SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION:
Supplemental Cash Flow Information [Abstract]
Customer [Domain]
Customer [Domain]
APAC
Asia Pacific and Japan [Member]
Asia Pacific and Japan [Member]
State
Current State and Local Tax Expense (Benefit)
Vested (shares)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period
General business credit carryforward
Deferred Tax Assets, Tax Credit Carryforwards, General Business
Earnings Per Share [Line Items]
Earnings Per Share [Line Items]
Earnings Per Share [Line Items]
Security Exchange Name
Security Exchange Name
Marketable equity securities
Equity Securities, FV-NI, Current
Forfeited (in dollars per share)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value
Accrued and other current liabilities
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Other
Forfeited (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period
Weighted average remaining lease term in years – operating leases
Operating Lease, Weighted Average Remaining Lease Term
Remaining terms (less than for minimum)
Operating Lease, Remaining Lease Term
Operating Lease, Remaining Lease Term
Foreign Currency and Transaction Gains and Losses
Foreign Currency Transactions and Translations Policy [Policy Text Block]
Number of primary stock incentive plans
Share-based Compensation Arrangement by Share-based Payment Award, Number of Primary Stock Incentive Plans
Share-based Compensation Arrangement by Share-based Payment Award, Number of Primary Stock Incentive Plans
Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table]
Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table]
Investment, Name [Axis]
Investment, Name [Axis]
Remaining shares available for grant under the plans (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect
Volatility
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate
Acquired intangibles
Deferred Tax Liabilities, Intangible Assets
Intrinsic value of options exercised
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value
Number of shares deregistered (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Deregistered
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Deregistered
Certificates of deposit and term deposits
Certificates of Deposit [Member]
Exercise Price, minimum (in dollars per share)
Share-based Payment Arrangement, Option, Exercise Price Range, Lower Range Limit
Summary of Investments
Schedule of Amortized Costs, Unrealized Gains and Losses, and Fair Value of Available For Sale Securities [Table Text Block]
Schedule of Amortized Costs, Unrealized Gains and Losses, and Fair Value of Available For Sale Securities [Table Text Block]
Subsequent Event Type [Domain]
Subsequent Event Type [Domain]
Lessee, Lease, Description [Line Items]
Lessee, Lease, Description [Line Items]
Amortization expense
Amortization of Intangible Assets
Other intangible assets
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill
Weighted-Average Useful Life (in Years)
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life
Stock repurchase program, unused balance
Stock Repurchase Program, Remaining Authorized Repurchase Amount
Gross increases for tax positions related to the prior year
Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions
Net deferred tax assets
Deferred Tax Assets, Net
Weighted average discount rate – operating leases
Operating Lease, Weighted Average Discount Rate, Percent
Anti-dilutive securities (in shares)
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount
Inventory
Schedule of Inventory, Current [Table Text Block]
Proceeds from mutual covenant-not-to-sue agreement
Proceeds From Mutual Covenant-Not-to-Sue Agreement
Proceeds From Mutual Covenant-Not-to-Sue Agreement
Revenue recognized that was previously included in deferred revenue in prior year
Contract with Customer, Liability, Revenue Recognized
Research and development
Research and Development Expense [Member]
Foreign withholding taxes
Effective Income Tax Rate Reconciliation, Foreign Withholding Taxes, Amount
Effective Income Tax Rate Reconciliation, Foreign Withholding Taxes, Amount
Subsequent Events [Abstract]
Subsequent Events [Abstract]
Deferred tax assets, net of valuation allowance
Deferred Tax Assets, Net of Valuation Allowance
Business Combination and Asset Acquisition [Abstract]
Business Acquisition [Axis]
Business Acquisition [Axis]
Revenue from External Customer [Line Items]
Revenue from External Customer [Line Items]
Award Type [Domain]
Award Type [Domain]
Fiscal Years:
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
Local Phone Number
Local Phone Number
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Options exercisable, Outstanding (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number
Backlog
Backlog [Member]
Backlog
Restricted Stock Units and Options
Restricted Stock Units and Options [Member]
Restricted Stock Units and Options
Investments Classified by Contractual Maturity Date
Investments Classified by Contractual Maturity Date [Table Text Block]
Significant change in unrecognized tax benefits is reasonably possible, amount of decrease in next 12 months
Decrease in Unrecognized Tax Benefits is Reasonably Possible
Fair Value
Finite-lived Intangible Assets Acquired
Retained Earnings (Accumulated Deficit)
Retained Earnings [Member]
Operating lease ROU assets
Deferred Tax Liabilities, Leasing Arrangements
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest [Abstract]
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest [Abstract]
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table]
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table]
Investments, All Other Investments [Abstract]
Investments, All Other Investments [Abstract]
Accounts receivable—net
Increase (Decrease) in Accounts Receivable
Liability for purchase of property and equipment
Capital Expenditures Incurred but Not yet Paid
Other long-term liabilities
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Other
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment [Line Items]
Entity Well Known Seasoned Issuer
Entity Well-known Seasoned Issuer
Shares withheld for taxes (in shares)
Share-based Payment Arrangement, Shares Withheld for Tax Withholding Obligation
Comprehensive income including non-controlling interests
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Basic (in dollars per share)
Earnings Per Share, Basic
Marketable equity securities, realized loss
Equity Securities, FV-NI, Realized Gain (Loss)
REVENUE RECOGNITION
Revenue from Contract with Customer [Text Block]
Balance, beginning (shares)
Balance, ending (shares)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number
Canada
CANADA
$76.22-$343.51
Price Range Four [Member]
Price Range Four [Member]
Interest expense
Interest Expense, Debt
Fair Value Measurement [Domain]
Fair Value Measurement [Domain]
DEFERRED CONTRACT COSTS
Capitalized Contract Cost, Net
Cumulative Effect, Period of Adoption, Adjustment
Cumulative Effect, Period of Adoption, Adjustment [Member]
Other
Other Noncash Income (Expense)
Concentration Risk
Concentration Risk [Policy Text Block]
Concentration Risk [Policy Text Block]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Evaluation units
Evaluation Units [Member]
Evaluation units [Member]
Entity Voluntary Filers
Entity Voluntary Filers
Fair value of options vested
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested in Period, Fair Value
Plan Name [Axis]
Plan Name [Axis]
Level 1
Fair Value, Inputs, Level 1 [Member]
CASH FLOWS FROM INVESTING ACTIVITIES:
Net Cash Provided by (Used in) Investing Activities [Abstract]
Goodwill impairment
Goodwill, Impairment Loss
Schedule of Warranties [Table]
Schedule of Warranties [Table]
Schedule of Warranties [Table]
Income Tax Disclosure [Abstract]
Income Tax Disclosure [Abstract]
State taxes—net of federal benefit
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount
Entity Small Business
Entity Small Business
Due within one to three years
Available-for-sale Securities, Debt Maturities, after One Year, Fair Value
This item represents the fair value of debt securities which are expected to mature after one year from the balance sheet date and which are categorized neither as held-to-maturity nor trading securities.
Gross increases for tax positions related to the current year
Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets [Line Items]
Payments of debt assumed in connection with business combination
Repayments of Assumed Debt
2009 Equity Incentive Plan (Amended Plan)
Stock Plan, 2009 [Member]
Stock Plan, 2009 [Member]
Panopta Holdings LLC
Panopta Holdings LLC [Member]
Panopta Holdings LLC
LIABILITIES AND EQUITY
Liabilities and Equity [Abstract]
Unrecognized tax benefits that would favorably affect effective tax rate
Unrecognized Tax Benefits that Would Impact Effective Tax Rate
Accounts payable
Increase (Decrease) in Accounts Payable
Entity Interactive Data Current
Entity Interactive Data Current
2024
Finite-Lived Intangible Asset, Expected Amortization, Year Four
Gross decreases for tax positions related to prior year audit settlements
Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities
Liability for uncertain tax positions
Liability for Uncertainty in Income Taxes, Noncurrent
Balance Sheet Location [Domain]
Balance Sheet Location [Domain]
Unrecognized tax benefits, beginning of year
Unrecognized tax benefits, end of year
Unrecognized Tax Benefits
Total deferred tax assets
Deferred Tax Assets, Gross
Income Tax Authority [Domain]
Income Tax Authority [Domain]
Entity Common Stock, Shares Outstanding
Entity Common Stock, Shares Outstanding
Unrealized Gains
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax
Entity Address, State or Province
Entity Address, State or Province
LEASES
Lessee, Finance Leases [Text Block]
DEFERRED TAX ASSETS
Deferred tax asset recorded
Deferred Income Tax Assets, Net
CURRENT LIABILITIES:
Liabilities, Current [Abstract]
General and administrative
General and Administrative Expense
Options exercisable, Weighted average exercise price (in dollars per share)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price
Schedule of Share-based Compensation, Stock Options, Activity, Additional Information
Schedule of Share-based Compensation, Stock Options, Activity, Additional Information [Table Text Block]
Schedule of Share-based Compensation, Stock Options, Activity, Additional Information
Property, Plant and Equipment, Net, by Type [Abstract]
Property, Plant and Equipment, Net, by Type [Abstract]
INVENTORY
Inventory Disclosure [Text Block]
GROSS PROFIT:
Gross Profit [Abstract]
Accrued interest and penalties related to uncertain tax benefits
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued
Marketable equity securities
Equity Securities [Member]
Accounting Policies [Abstract]
Accounting Policies [Abstract]
Options outstanding, Weighted average remaining contractual life (in years)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term
Other long-term assets
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets
Federal
Current Federal Tax Expense (Benefit)
Total operating lease liabilities
Total
Operating Lease, Liability
Document Transition Report
Document Transition Report
Common stock, $0.001 par value—300.0 shares authorized; 162.0 shares and 162.5 shares issued and outstanding at December 31, 2021 and 2020, respectively
Common Stock, Value, Issued
Compensation cost not yet recognized period of recognition
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition
Balance, beginning (in dollars per share)
Balance, ending (in dollars per share)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value
Customer Concentration Risk [Member]
Customer Concentration Risk [Member]
Linksys
Linksys [Member]
Linksys
LEASES
Lessee, Operating Leases [Text Block]
BUSINESS COMBINATIONS
Business Combination Disclosure [Text Block]
ICFR Auditor Attestation Flag
ICFR Auditor Attestation Flag
U.S., Canada, and France
U.S., Canada, and France [Member]
U.S., Canada, and France
Antidilutive Securities, Name [Domain]
Antidilutive Securities, Name [Domain]
Square feet of property purchased
Property, Plant And Equipment, Additions, Area Of Property Purchased
Property, Plant And Equipment, Additions, Area Of Property Purchased
Foreign
Deferred Foreign Income Tax Expense (Benefit)
INVESTMENTS IN PRIVATELY HELD COMPANIES
Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block]
RSUs and stock options (in shares)
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements
Goodwill [Line Items]
Goodwill [Line Items]
Class of Stock [Axis]
Class of Stock [Axis]
Revenue from external customers by geographic region
Revenue from External Customers by Geographic Areas [Table Text Block]
Marketable Equity Securities
Marketable Securities, Policy [Policy Text Block]
Amount recorded in accrued liabilities and other liabilities in condensed consolidated balance sheet
Mutual Covenant Not-to-Sue Agreement, Patent Claims, Liability
Mutual Covenant Not-to-Sue Agreement, Patent Claims, Liability
Pro forma net income attributable to Fortinet, Inc.
Business Acquisition, Pro Forma Net Income (Loss)
Cash paid for amounts included in the measurement of lease liabilities
Cash Flow, Lessee [Abstract]
Cash Flow, Lessee [Abstract]
One-time transition tax
Effective Income Tax Rate Reconciliation, Tax Cuts and Jobs Act, Transition Tax on Accumulated Foreign Earnings, Amount
Commissions Expense [Table]
Commissions Expense [Table]
Commissions Expense [Table]
Income Tax Contingency [Line Items]
Income Tax Contingency [Line Items]
Income Tax Authority [Axis]
Income Tax Authority [Axis]
Work in process
Inventory, Work in Process, Net of Reserves
Purchases of property and equipment
Payments to Acquire Productive Assets
Prepaid expenses and other current assets
Prepaid Expense and Other Assets, Current
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Accrued liabilities
Accrued Liabilities, Current
Total revenue
Revenue
Revenue from Contract with Customer, Excluding Assessed Tax
Stock-based compensation expense
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Share-based Compensation Cost
Finished goods
Inventory, Finished Goods, Net of Reserves
Stock options
Share-based Payment Arrangement, Option [Member]
Equity [Abstract]
Fair Value Hierarchy and NAV [Axis]
Fair Value Hierarchy and NAV [Axis]
Depreciation and amortization
Deferred Tax Assets, Property, Plant and Equipment
Foreign-Derived Intangible Income
Effective Income Tax Rate Reconciliation, Tax Cuts And Jobs Act, Deduction, Foreign-Derived Intangible Income, Amount
Effective Income Tax Rate Reconciliation, Tax Cuts And Jobs Act, Deduction, Foreign-Derived Intangible Income, Amount
Warranties
Standard Product Warranty, Policy [Policy Text Block]
Weighted-average price per share issued (in dollars per share)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Issued, Weighted Average Price per Share
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Issued, Weighted Average Price per Share
Less Than 12 Months, Fair Value
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months
SEGMENT INFORMATION
Segment Reporting Disclosure [Text Block]
Mutual Covenant-Not-to-Sue Agreement [Abstract]
Mutual Covenant-Not-to-Sue Agreement [Abstract]
Other Americas
Other Americas [Member]
Other Americas [Member]
Schedule of Property, Plant and Equipment [Table]
Property, Plant and Equipment [Table]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale [Line Items]
TD Synnex [Member]
TD Synnex [Member]
TD Synnex
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Document Fiscal Year Focus
Document Fiscal Year Focus
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment [Abstract]
Purchases of investments
Payments to Acquire Other Investments
Additional Paid-In Capital
Additional Paid-in Capital [Member]
Long-term Debt, Type [Domain]
Long-term Debt, Type [Domain]
Accrued interest payable
Interest Payable
Investments in privately held companies
Equity Method Investments [Policy Text Block]
Stock-based compensation expense
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-based Payment Arrangement, Amount
OTHER EXPENSE—NET
Other Nonoperating Income (Expense)
Estimated fair value of outstanding debt
Long-term Debt, Fair Value
Purchases of marketable equity securities
Payments for (Proceeds from) Other Investing Activities
Repurchase and retirement of common stock (in shares)
Stock repurchased in the period, shares
Stock Repurchased and Retired During Period, Shares
Deferred revenue
Deferred Tax Assets, Deferred Income
Maximum
Maximum [Member]
Change in foreign currency translation
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, before Tax
Share-based Payment Arrangement [Abstract]
Share-based Payment Arrangement [Abstract]
Raw materials
Inventory, Raw Materials, Net of Reserves
Chicago
Chicago [Member]
Chicago
Award Type [Axis]
Award Type [Axis]
CASH FLOWS FROM FINANCING ACTIVITIES:
Net Cash Provided by (Used in) Financing Activities [Abstract]
Maturities of Operating Lease Liabilities
Lessee, Operating Lease, Liability, Maturity [Table Text Block]
Total Fortinet, Inc. stockholders’ equity
Stockholders' Equity Attributable to Parent
City Area Code
City Area Code
Options exercisable, Aggregate intrinsic value
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value
Prepaid expenses and other current assets
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Prepaid Expense and Other Assets
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Intangible Assets Disclosure [Abstract]
Repurchase and retirement of common stock
Payments for Repurchase of Common Stock
Property and equipment, useful life
Property, Plant and Equipment, Useful Life
EQUITY:
Stockholders' Equity Attributable to Parent [Abstract]
Deferred contract costs
Increase (Decrease) in Deferred Charges
INTEREST INCOME
Investment Income, Net
Operating lease liabilities – non-current
Operating Lease, Liability, Noncurrent
Adjustments for New Accounting Pronouncements [Axis]
Accounting Standards Update [Axis]
Total current
Current Income Tax Expense (Benefit)
Aggregate principal amount
Debt Instrument, Face Amount
EMEA
Europe, Middle East and Africa [Member]
Europe, Middle East and Africa [Member]
Research and Development Costs and Software Development Costs
Research, Development, and Computer Software, Policy [Policy Text Block]
Share-based Payment Arrangement
Share-based Payment Arrangement [Member]
RSUs
Restricted Stock Units (RSUs) [Member]
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block]
Matching contribution on employee contributions, Percent
Defined Contribution Plan, Employer Matching Contribution, Percent of Match
Total deferred tax liabilities
Deferred Tax Liabilities, Gross
Business Acquisition [Line Items]
Business Acquisition [Line Items]
Impairment loss
Capitalized Contract Cost, Impairment Loss
Share Repurchase Program [Axis]
Share Repurchase Program [Axis]
Income Statement [Abstract]
Income Statement [Abstract]
Entity Registrant Name
Entity Registrant Name
Accounts receivable—net
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables
Options Outstanding, Weighted Average Exercise Price (in dollars per share)
Share-based Payment Arrangement, Option, Exercise Price Range, Outstanding, Weighted Average Exercise Price
Other
Effective Income Tax Rate Reconciliation, Other Adjustments, Amount
Forfeited (in dollars per share)
Share-based Compensation Arrangements by Share-based Payment Award, Options, Forfeitures in Period, Weighted Average Exercise Price
PROVISION FOR INCOME TAXES
Provision for income taxes
Income Tax Expense (Benefit)
Accounts receivable—Net of allowance for credit losses of $2.4 million and $2.5 million at December 31, 2021 and 2020, respectively
Accounts Receivable, after Allowance for Credit Loss, Current
Entity Tax Identification Number
Entity Tax Identification Number
Document Fiscal Period Focus
Document Fiscal Period Focus
Total current assets
Assets, Current
Schedule of Range of Options
Share-based Payment Arrangement, Option, Exercise Price Range [Table Text Block]
Total lease payments
Lessee, Operating Lease, Liability, to be Paid
Accounts Receivable [Member]
Accounts Receivable [Member]
Forfeited (shares)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period
Valuation allowance
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount
Stock repurchased, value
Stock Repurchased During Period, Value
Stock-Based Compensation
Share-based Payment Arrangement [Policy Text Block]
Available-for-sale Securities, Debt Maturities, Fair Value [Abstract]
Debt Securities, Available-for-sale, Fair Value, Fiscal Year Maturity [Abstract]
Security Subscription [Member]
Security Subscription [Member]
Security Subscription [Member]
Statement of Financial Position [Abstract]
Statement of Financial Position [Abstract]
$48.83-$72.75
Price Range Three [Member]
Price Range Three [Member]
Business activity (in business activities)
Number of Business Activities
Number of business activities
Property, Plant and Equipment, Type [Domain]
Long-Lived Tangible Asset [Domain]
Weighted-average fair value per share granted
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value
Additional proceeds if extended
Mutual Covenant-Not-to-Sue Agreement, Patent Claims, Extension Option, Additional Proceeds
Mutual Covenant-Not-to-Sue Agreement, Patent Claims, Extension Option, Additional Proceeds
Equity Component [Domain]
Equity Component [Domain]
2022
Lessee, Operating Lease, Liability, to be Paid, Year One
Schedule of Equity Method Investments [Table]
Schedule of Equity Method Investments [Table]
Deferred tax assets:
Components of Deferred Tax Assets [Abstract]
Amount representing the right to utilize future patents
Mutual Covenant-Not-to-Sue Agreement, Patent Claims, Right to Utilize Future Patents, Liability
Mutual Covenant-Not-to-Sue Agreement, Patent Claims, Right to Utilize Future Patents, Liability
Remaining performance obligation
Revenue, Remaining Performance Obligation, Amount
Other contractual commitments and open purchase orders
Other Commitment
LIABILITIES
Liabilities [Abstract]
2025
Lessee, Operating Lease, Liability, to be Paid, Year Four
Level 2
Fair Value, Inputs, Level 2 [Member]
Type of Adoption [Domain]
Accounting Standards Update [Domain]
Research and development credit
Effective Income Tax Rate Reconciliation, Tax Credit, Research, Amount
Auditor Location
Auditor Location
Total, Fair Value
Debt Securities, Available-for-sale, Unrealized Loss Position
Segment Reporting [Abstract]
Segment Reporting [Abstract]
Amortized Cost
Debt Securities, Available-for-sale, Amortized Cost
Revenue from External Customers by Products and Services [Table]
Revenue from External Customers by Products and Services [Table]
Useful life of finite-lived intangible assets
Finite-Lived Intangible Asset, Useful Life
Use of Estimates
Use of Estimates, Policy [Policy Text Block]
Schedule of Earnings Per Share, Basic and Diluted
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
DEFERRED REVENUE
Deferred Revenue, Noncurrent
Title of 12(b) Security
Title of 12(b) Security
Investment, Name [Domain]
Investment, Name [Domain]
Common Stock, shares authorized
Common Stock, Shares Authorized
Short-term investments, maximum original maturity
Investments, Classification as Short-term, Maximum Original Maturity
Investments, Classification as Short-term, Maximum Original Maturity
Deferred Compensation Arrangement with Individual, Share-based Payments, by Title of Individual [Axis]
Title of Individual [Axis]
Noncontrolling Interest, Period Increase (Decrease)
Noncontrolling Interest, Period Increase (Decrease)
Document Type
Document Type
Additional minimum lease payments relating to operating office space lease signed but not yet commenced
Operating Lease, Lease Not yet Commenced, Expense
Operating Lease, Lease Not yet Commenced, Expense
Product and Service [Domain]
Product and Service [Domain]
Stated interest rate
Coupon Rate
Debt Instrument, Interest Rate, Stated Percentage
Warranty length
Warranty Length
Warranty Length
Renewal terms (up to)
Lessee, Operating Lease, Renewal Term
LESS: NET LOSS ATTRIBUTABLE TO NON-CONTROLLING INTERESTS, NET OF TAX
Net loss attributable to non-controlling interests
Net Income (Loss) Attributable to Noncontrolling Interest
Net increase of gross unrecognized tax benefits
Unrecognized Tax Benefits, Period Increase (Decrease)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share Repurchase Program [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Measurement Frequency [Axis]
Measurement Frequency [Axis]
Share-based Payment Arrangement, Option, Exercise Price Range [Table]
Share-based Payment Arrangement, Option, Exercise Price Range [Table]
Components of Lease Expense and Supplemental Cash Flow Information
Lease, Cost [Table Text Block]
ShieldX Networks Inc (ShieldX)
ShieldX Networks Inc (ShieldX) [Member]
ShieldX Networks Inc (ShieldX)
Geographical [Axis]
Statement, Geographical [Axis]
Geographical [Axis]
Commercial paper
Commercial Paper, Not Included with Cash and Cash Equivalents [Member]
State and Local Jurisdiction [Member]
State and Local Jurisdiction [Member]
Product
Product [Member]
TOTAL ASSETS
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets
Subsequent Event
Subsequent Events [Text Block]
Foreign income taxed at different rates
Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Amount
Goodwill expected to be deductible for tax purposes
Business Acquisition, Goodwill, Expected Tax Deductible Amount
Net cash provided by (used in) financing activities
Net Cash Provided by (Used in) Financing Activities
Weighted-average shares used to compute net income per share attributable to Fortinet, Inc.:
Diluted shares:
Weighted Average Number of Shares Outstanding, Diluted [Abstract]
Award vesting period
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period
LOSS FROM EQUITY METHOD INVESTMENT
Loss from equity method investment
Income (Loss) from Equity Method Investments
Reserved for Future Option, Restricted Stock Unit and Other Equity Award Grants
Reserved for Future Option, Restricted Stock Unit and Other Equity Award Grants [Member]
Reserved for Future Option, Restricted Stock Unit and Other Equity Award Grants [Member]
Concentration Risk by Type [Axis]
Concentration Risk Type [Axis]
Stock Options, Nonqualifying
Stock Options, Nonqualifying [Member]
Stock Options, Nonqualifying [Member]
Extension term
Mutual Covenant-Not-to-Sue Agreement, Patent Claims, Extension Option, Term
Mutual Covenant-Not-to-Sue Agreement, Patent Claims, Extension Option, Term
2023
Finite-Lived Intangible Asset, Expected Amortization, Year Three
Deferred tax liabilities:
Deferred Tax Liabilities, Gross [Abstract]
Business Combinations
Business Combinations Policy [Policy Text Block]
AlaxaIA
AlaxaIA Networks Corporation [Member]
AlaxaIA Networks Corporation
Accounts payable
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable
Commissions Expense [Line Items]
Commissions Expense [Line Items]
[Line Items] for Commissions Expense [Table]
Goodwill
Goodwill and Intangible Assets, Goodwill, Policy [Policy Text Block]
Document Period End Date
Document Period End Date
Operating lease liabilities
Deferred Tax Assets, Operating Lease Liabilities
Deferred Tax Assets, Operating Lease Liabilities
Number of reporting units
Number of Reporting Units
Issuance of common stock in connection with equity incentive plans - net of tax withholding
Stock Issued During Period, Value, Equity Incentive Plans, Net of Taxes Withheld
Stock Issued During Period, Value, Equity Incentive Plans, Net of Taxes Withheld
Directors and Other Service Providers
Directors and Other Service Providers [Member]
Directors and Other Service Providers [Member]
Concentration Risk Benchmark [Domain]
Concentration Risk Benchmark [Domain]
Number of Shares
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
State
Deferred State and Local Income Tax Expense (Benefit)
Schedule of Property, Plant and Equipment - Net
Property, Plant and Equipment [Table Text Block]
Income Statement Location [Domain]
Income Statement Location [Domain]
NON-CASH INVESTING AND FINANCING ACTIVITIES:
Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract]
Invoice payable period (no more than)
Revenue from Contract with Customers, General Invoice Payable Period
Revenue from Contract with Customers, General Invoice Payable Period
PROPERTY AND EQUIPMENT—NET
Property and equipment—net
Property and equipment - net
Property, Plant and Equipment, Net
Total operating expenses
Operating Expenses
Income Tax Liabilities
Accrued Income Taxes, Noncurrent [Member]
Accrued Income Taxes, Noncurrent
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]
Net income per share attributable to Fortinet, Inc. (Note 9):
Earnings Per Share [Abstract]
Total property and equipment
Property, Plant and Equipment, Gross
Current portion of long-term debt
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Long-term Debt
Allowance for credit losses
Accounts Receivable, Allowance for Credit Loss
Balance - Beginning (in dollars per share)
Balance - Ending (in dollars per share)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]
Other net assets acquired
Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Other Assets (Liabilities), Net
Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Other Assets (Liabilities), Net
Schedule of Equity Method Investments [Line Items]
Schedule of Equity Method Investments [Line Items]
Entity Current Reporting Status
Entity Current Reporting Status
Weighted-Average Grant Date Fair Value per Share
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Amortization of investment premiums (discounts)
Accretion (Amortization) of Discounts and Premiums, Investments
Balance, beginning of period (in shares)
Balance, end of period (in shares)
Shares, Issued
United States
UNITED STATES
Shares reserved for future issuances (in shares)
Common Stock, Capital Shares Reserved for Future Issuance
Leases [Abstract]
Leases [Abstract]
COST OF REVENUE:
Cost of Goods and Services Sold [Abstract]
Income Taxes
Income Tax, Policy [Policy Text Block]
Entity Address, Postal Zip Code
Entity Address, Postal Zip Code
Financial Instruments and Fair Value [Abstract]
Financial Instruments and Fair Value [Abstract]
Financial Instruments and Fair Value [Abstract]
Deferred Revenue
Revenue from Contract with Customer [Policy Text Block]
2022
Purchase Obligation, to be Paid, Year One
Accounting Standards Update 2021-08
Accounting Standards Update 2021-08 [Member]
Accounting Standards Update 2021-08
Diluted (in shares)
Weighted-average shares used to compute diluted net income per share (in shares)
Weighted Average Number of Shares Outstanding, Diluted
Domestic
Income (Loss) from Continuing Operations before Income Taxes, Domestic
INCOME TAXES
Income Tax Disclosure [Text Block]
Cash equivalents
Cash Equivalents, Line Item [Member]
Cash Equivalents, Line Item [Member]
Basic shares:
Weighted Average Number of Shares Outstanding, Basic [Abstract]
Long-term Debt, Type [Axis]
Long-term Debt, Type [Axis]
Schedule of Share-based Compensation, Stock Options, Activity
Share-based Payment Arrangement, Option, Activity [Table Text Block]
Schedule of Acquired Finite-Lived Intangible Assets by Major Class
Schedule of Acquired Finite-Lived Intangible Assets by Major Class [Table Text Block]
Liability incurred in connection with business combination
Business Combination, Liabilities Incurred
Business Combination, Liabilities Incurred
Statement of Cash Flows [Abstract]
Statement of Cash Flows [Abstract]
Short-term investments
Other Short-term Investments
Total
Inventory purchase commitments
Purchase Obligation
Finite-Lived Intangible Assets, Major Class Name [Domain]
Finite-Lived Intangible Assets, Major Class Name [Domain]
Entity Address, Address Line One
Entity Address, Address Line One
Less: accumulated depreciation
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment
CASH FLOWS FROM OPERATING ACTIVITIES:
Net Cash Provided by (Used in) Operating Activities [Abstract]
General and administrative
General and Administrative Expense [Member]
Entity Shell Company
Entity Shell Company
Expected term in years
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term
Total current liabilities
Liabilities, Current
ESPP
Employee Stock [Member]
Taxes paid related to net share settlement of equity awards
Amount withheld for taxes
Payment, Tax Withholding, Share-based Payment Arrangement
Schedule of Share-based Payment Award Employee Stock Purchase Plan Additional Information
Schedule of Share based Payment Award Employee Stock Purchase Plan Additional Information [Table Text Block]
Schedule of Share based Payment Award Employee Stock Purchase Plan Additional Information [Table Text Block]
Long-term investments
Long Term Investments, Line Item [Member]
Long Term Investments, Line Item [Member]
Cash
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents
Maximum contribution percentage of each employee's eligible earnings, Percent
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay
Options vested and expected to vest, Aggregate intrinsic value
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value
Current Fiscal Year End Date
Current Fiscal Year End Date
Less: Unamortized discount and debt issuance costs
Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net
FINANCIAL INSTRUMENTS AND FAIR VALUE
Financial Instruments Disclosure [Text Block]
$31.39-$39.49
Price Range Two [Member]
Price Range Two [Member]
Statement [Table]
Statement [Table]
Recently Adopted Accounting Standards and Recent Accounting Standards Not Yet Effective
New Accounting Pronouncements, Policy [Policy Text Block]
Compensation cost not yet recognized
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount
Statistical Measurement [Axis]
Statistical Measurement [Axis]
Accounts receivable
Accounts Receivable [Policy Text Block]
Subsequent Event
Subsequent Event [Member]
Total
Finite-Lived Intangible Assets, Net
GOODWILL
Goodwill
Balance - beginning of period
Balance - end of period
Goodwill
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]
Non-controlling interests
Stockholders' Equity Attributable to Noncontrolling Interest
Less Than 12 Months, Unrealized Losses
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss
Income Tax Benefit from Stock Option Plans
Income Tax Benefit from Stock Option Plans [Table Text Block]
Income Tax Benefit from Stock Option Plans [Table Text Block]
Schedule of Changes in Carrying Value of Goodwill
Schedule of Goodwill [Table Text Block]
Adjustments to reconcile net income to net cash provided by operating activities:
Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract]
Subsequent Event Type [Axis]
Subsequent Event Type [Axis]
Operating lease expense
Operating Lease, Cost
Computer equipment and software
Computer Equipment [Member]
12 Months or Greater, Unrealized Losses
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss
Total deferred
Deferred Income Tax Expense (Benefit)
Options vested and expected to vest, Weighted average remaining contractual life (in years)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Remaining Contractual Term
Stock repurchase program, authorized amount
Stock Repurchase Program, Authorized Amount
Changes in operating assets and liabilities, net of impact of business combinations:
Increase (Decrease) in Other Operating Assets and Liabilities, Net [Abstract]
Fair Value, Measurements, Fair Value Hierarchy [Domain]
Fair Value Hierarchy and NAV [Domain]
NET INCOME ATTRIBUTABLE TO FORTINET, INC.
Net Income (Loss) Attributable to Parent
Operating lease ROU assets – non-current
Operating Lease, Right-of-Use Asset
Loss from equity method investment
Equity Method Investment, Realized Gain (Loss) on Disposal
Net operating loss carryforward
Deferred Tax Assets, Operating Loss Carryforwards
Accrued payroll and compensation
Employee-related Liabilities, Current
Income Statement Location [Axis]
Income Statement Location [Axis]
Accumulated Amortization
Finite-Lived Intangible Assets, Accumulated Amortization
Statistical Measurement [Domain]
Statistical Measurement [Domain]
Entity Incorporation, State or Country Code
Entity Incorporation, State or Country Code
REVENUE:
Revenue from Contract with Customer [Abstract]
Additional paid-in capital
Additional Paid in Capital, Common Stock
OTHER ASSETS
Other Assets, Noncurrent
Dividend rate
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate
Retirement Benefits [Abstract]
Retirement Benefits [Abstract]
Entity File Number
Entity File Number
Stock-based compensation expense
APIC, Share-based Payment Arrangement, Increase for Cost Recognition
Short-term investments
Short Term Investments, Line Item [Member]
Short Term Investments, Line Item [Member]
Mutual Covenant-Not-to-Sue and Release Agreement
Mutual Covenant-Not-to-Sue Agreement Disclosure [Text Block]
Mutual Covenant-Not-to-Sue Agreement Disclosure [Text Block]
Litigation settlement, expense
Litigation Settlement, Expense
Variable lease expense
Variable Lease, Cost
Liability incurred in connection with business combination, amount recognized as compensation cost in consolidated statement of income
Business Combination, Compensation Expense, Liabilities Incurred
Business Combination, Compensation Expense, Liabilities Incurred
Granted (in dollars per share)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value
Municipal bonds
Municipal Bonds [Member]
Title of Individual with Relationship to Entity [Domain]
Title of Individual [Domain]
Maturities of investments
Proceeds from Maturities, Prepayments and Calls of Debt Securities, Available-for-sale
Net unrealized loss on investments - net of tax
OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment, after Tax
Share Repurchase Program [Domain]
Share Repurchase Program [Domain]
Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Axis]
Exercise Price Range [Axis]
Cash, Cash Equivalents and Available-for-sale Investments
Cash and Cash Equivalents and Available-for-Sale Investments [Policy Text Block]
Cash and Cash Equivalents and Available-for-Sale Investments [Policy Text Block]
ASSETS
Assets [Abstract]
Land
Land [Member]
Options vested and expected to vest, Weighted average exercise price (in dollars per share)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Exercise Price
Finance lease liabilities arising from obtaining right-of-use assets
Right-of-Use Asset Obtained in Exchange for Finance Lease Liability
Granted (shares)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period
GOODWILL AND OTHER INTANGIBLE ASSETS - Net
Goodwill and Intangible Assets Disclosure [Text Block]
Concentration (percent)
Concentration Risk, Percentage
Property and Equipment
Property, Plant and Equipment, Policy [Policy Text Block]
Balance - Beginning (in shares)
Balance - Ending (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number
Schedule of Estimated Useful Lives of Property and Equipment - net
Schedule of Estimated Useful Lives of Property, Plant and Equipment [Table Text Block]
Schedule of Estimated Useful Lives of Property, Plant and Equipment [Table Text Block]
Amount allocated to functional component
Mutual Covenant-Not-to-Sue Agreement, Patent Claims, Allocated Value
Mutual Covenant-Not-to-Sue Agreement, Patent Claims, Allocated Value
Trade name
Trade Names [Member]
Debt Instrument [Axis]
Debt Instrument [Axis]
Prepaid expenses and other current assets
Increase (Decrease) in Prepaid Expense and Other Assets
Lease not yet commenced, approximate term
Lessee, Operating Lease, Lease Not yet Commenced, Term of Contract
Advertising Expense
Advertising Cost [Policy Text Block]
COMMITMENTS AND CONTINGENCIES
Commitments and Contingencies Disclosure [Text Block]
Minimum stock ownership percent triggering early award expiration
Share-based Compensation Arrangement by Share-based Payment Award, Minimum Stock Ownership Percent Triggering Early Award Expiration
Share-based Compensation Arrangement by Share-based Payment Award, Minimum Stock Ownership Percent Triggering Early Award Expiration
Repurchase and retirement of common stock
Stock repurchased in the period, value
Stock Repurchased and Retired During Period, Value
Property and equipment by geographic region
Long-lived Assets by Geographic Areas [Table Text Block]
Inventory
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory
Operating lease liabilities arising from obtaining right-of-use assets
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability
Business Acquisition, Pro Forma Information
Business Acquisition, Pro Forma Information [Table Text Block]
Schedule of Deferred Tax Assets and Liabilities
Schedule of Deferred Tax Assets and Liabilities [Table Text Block]
Maximum employee contribution rate (percent)
Share-based Compensation Arrangement by Share-based Payment Award, Maximum Employee Subscription Rate
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies Disclosure [Abstract]
Schedule of Segment Reporting Information, by Segment [Table]
Schedule of Segment Reporting Information, by Segment [Table]
Number of operating segments (in operating segments)
Number of Operating Segments
U.S. government and agency securities
US Treasury and Government [Member]
2024
Lessee, Operating Lease, Liability, to be Paid, Year Three
Additional shares authorized
Stock Repurchase Program, Authorized Amount, Approved Increase
Stock Repurchase Program, Authorized Amount, Approved Increase
Purchases of marketable equity securities
Payments to Acquire Equity Securities, FV-NI
Contingent Liabilities
Commitments and Contingencies, Policy [Policy Text Block]
Disaggregation of Revenue
Disaggregation of Revenue [Table Text Block]
Number of Shares
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Gain on intellectual property matter
Gain on IP matter
Gain (Loss) From Mutual Covenant-Not-To-Sue Agreement, Right To Use Existing Intellectual Property
Gain (Loss) From Mutual Covenant-Not-To-Sue Agreement, Right To Use Existing Intellectual Property
Total identified intangible assets:
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles
Software Products [Member]
Software, Product Warranty [Member]
Software, Product Warranty
Number of shares authorized (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized
Operating cash flows used for operating leases
Operating Lease, Payments
Total debt
Long-term Debt, Gross
Goodwill [Roll Forward]
Goodwill [Roll Forward]
Proceeds from release of indemnity escrow
Proceeds From Release Of Indemnity Escrow Related To Business Combination
Proceeds From Release Of Indemnity Escrow Related To Business Combination
Total Assets, Fair Value Disclosure
Assets, Fair Value Disclosure
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
TOTAL LIABILITIES AND EQUITY
Liabilities and Equity
Deferred contract costs
Deferred Tax Liabilities, Deferred Expense
Americas [Member]
Americas [Member]
2026
Lessee, Operating Lease, Liability, to be Paid, Year Five
Exercised (in dollars per share)
Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price
Service
Service [Member]
Lessee, Lease, Description [Table]
Lessee, Lease, Description [Table]
Income tax benefit associated with stock-based compensation
Share-based Payment Arrangement, Exercise of Option, Tax Benefit
Concentration Risk [Line Items]
Concentration Risk [Line Items]
Issuance of common stock in connection with equity incentive plans - net of tax withholding (in shares)
Stock Issued During Period, Shares, Equity Incentive Plans
Stock Issued During Period, Shares, Equity Incentive Plans
Options Exercisable, Weighted Average Exercise Price (in dollars per share)
Share-based Payment Arrangement, Option, Exercise Price Range, Exercisable, Weighted Average Exercise Price
Income Tax Contingency [Table]
Income Tax Contingency [Table]
NET INCOME PER SHARE
Earnings Per Share [Text Block]
OPERATING EXPENSES:
Operating Expenses [Abstract]
Average price of stock repurchased (in dollars per share)
Treasury Stock Acquired, Average Cost Per Share
Investment ownership percentage
Equity Method Investment, Ownership Percentage
Minimum
Minimum [Member]
Total gross profit
Gross Profit
Schedule of Shares Reserved for Future Issuance
Schedule of Shares Reserved for Future Issuance [Table Text Block]
Schedule of Shares Reserved for Future Issuance [Table Text Block]
2023
Lessee, Operating Lease, Liability, to be Paid, Year Two
EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS
Effect of Exchange Rate on Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents
INCOME BEFORE INCOME TAXES AND LOSS FROM EQUITY METHOD INVESTMENT
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table]
Cumulative Effect, Period of Adoption [Axis]
Cumulative Effect, Period of Adoption [Axis]
12 Months or Greater, Fair Value
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer
Equity interests acquired
Business Acquisition, Percentage of Voting Interests Acquired
Revenue Recognition
Revenue [Policy Text Block]
Payments made in connection with business combinations, net of cash acquired
Payments to Acquire Businesses, Net of Cash Acquired
Debt
Debt Disclosure [Text Block]
Long-term investments, minimum original maturity
Investments, Classification as Long-term, Minimum Maturity
Investments, Classification as Long-term, Minimum Maturity
Contractual term
Mutual Covenant-Not-to-Sue Agreement, Patent Claims, Contractual Term
Mutual Covenant-Not-to-Sue Agreement, Patent Claims, Contractual Term
Schedule of Components of Income Tax Expense (Benefit)
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]
Options Exercisable, Number Exercisable (in shares)
Share-based Payment Arrangement, Option, Exercise Price Range, Shares Exercisable
EQUITY
Share-based Payment Arrangement [Text Block]
Senior Notes
Senior Notes [Member]
Non-controlling interests
NON-CONTROLLING INTERESTS
Business Combination, Acquisition of Less than 100 Percent, Noncontrolling Interest, Fair Value
Level 3
Fair Value, Inputs, Level 3 [Member]
Leases
Lessee, Leases [Policy Text Block]
Number of reportable segments (in reportable segments)
Number of Reportable Segments
Periodic purchase limit (shares)
Employee Stock Purchase Plan, Periodic Purchase Limit
Employee Stock Purchase Plan, Periodic Purchase Limit
Cash paid to settle liability incurred for repurchase of common stock
Repurchase of Common Stock, Settlement of Liabilities Incurred
Repurchase of Common Stock, Settlement of Liabilities Incurred
Foreign currency transaction losses
Foreign Currency Transaction Gain (Loss), before Tax
Purchase price of common stock as percentage of lower of fair market value of common stock on first day of offering period or last day of purchase period
Purchase Price of Common Stock As Percentage Of Lower Of Fair Market Value Of Common Stock On First Day Of Offering Period Or Last Day Of Purchase Period
Purchase Price of Common Stock As Percentage Of Lower Of Fair Market Value Of Common Stock On First Day Of Offering Period Or Last Day Of Purchase Period
Disaggregation of Revenue [Line Items]
Disaggregation of Revenue [Line Items]
Inventory, Net [Abstract]
Inventory, Net [Abstract]
Additions due to business combinations
Goodwill, Acquired During Period
COMMITMENTS AND CONTINGENCIES (Note 13)
Commitments and Contingencies
Subsequent Event [Table]
Subsequent Event [Table]
Accumulated other comprehensive income (loss)
Accumulated Other Comprehensive Income (Loss), Net of Tax
Cost of service revenue
Cost of Services [Member]
Cost of Services [Member]
Entity Emerging Growth Company
Entity Emerging Growth Company
Matching contributions to the RRSP and 401(k) Plans
Defined Contribution Plan, Employer Matching Contribution, Amount
Defined Contribution Plan, Employer Matching Contribution, Amount
INCOME TAX LIABILITIES
Accrued Income Taxes, Noncurrent
DEFINED CONTRIBUTION PLANS
Compensation and Employee Benefit Plans [Text Block]
Stock Options and Restricted Stock Units, Outstanding
Stock Options and Restricted Stock Units, Outstanding [Member]
Stock Options and Restricted Stock Units, Outstanding [Member]
Payments for debt issuance costs
Payments of Debt Issuance Costs
EnSilo Ltd.
EnSilo Ltd. [Member]
EnSilo Ltd. [Member]
Auditor Name
Auditor Name
Cover [Abstract]
Cover [Abstract]
California [Member]
State Jurisdiction, California [Member]
State Jurisdiction, California [Member]
Schedule of Unrealized Loss on Investments
Schedule of Unrealized Loss on Investments [Table Text Block]
Less imputed interest
Lessee, Operating Lease, Liability, Undiscounted Excess Amount
Hardware Products [Member]
Hardware, Product Warranty [Member]
Hardware, Product Warranty [Member]
Litigation settlement, deferred loss payment expensed over time
Litigation Settlement, Deferred Loss Payment Expensed Over Time
Litigation Settlement, Deferred Loss Payment Expensed Over Time
Schedule of Available-for-sale Securities, Major Types of Debt and Equity Securities [Axis]
Financial Instrument [Axis]
Options Outstanding, Weighted Average Remaining Contractual Life (in years)
Share-based Payment Arrangement, Option, Exercise Price Range, Outstanding, Weighted Average Remaining Contractual Term
Schedule of Available-for-sale Securities [Table]
Schedule of Available-for-sale Securities [Table]
Current:
Current Income Tax Expense (Benefit), Continuing Operations [Abstract]
Reported as [Member]
Reported Value Measurement [Member]
Common Stock
Common Stock [Member]
Foreign
Income (Loss) from Continuing Operations before Income Taxes, Foreign
OPERATING INCOME
Operating Income (Loss)
Annual purchase limit
Employee Stock Purchase Plan, Annual Purchase Limit
Employee Stock Purchase Plan, Annual Purchase Limit
Operating lease liabilities – current
Operating Lease, Liability, Current
Supplemental Balance Sheet Information
Assets And Liabilities, Lessee [Table Text Block]
Assets And Liabilities, Lessee [Table Text Block]
Unrealized Losses
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax
Less: comprehensive loss attributable to non-controlling interests
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Noncontrolling Interest
2022
Finite-Lived Intangible Asset, Expected Amortization, Year Two
Stock-based compensation
Share-based Payment Arrangement, Noncash Expense
Cash and cash equivalents
Cash and Cash Equivalents, at Carrying Value
Schedule of Share-based Compensation, Shares Withheld for Taxes
Schedule of Share-based Compensation, Shares Withheld for Taxes [Table Text Block]
Schedule of Share-based Compensation, Shares Withheld for Taxes [Table Text Block]
Depreciation
Depreciation
Schedule of Earnings Per Share [Table]
Schedule of Earnings Per Share [Table]
Schedule of Earnings Per Share [Table]
Deferred tax assets
Increase (Decrease) in Deferred Income Taxes
Schedule of Employee Service Share based Compensation Allocation of Recognized Period Costs by Award Type
Schedule of Employee Service Share based Compensation Allocation of Recognized Period Costs by Award Type [Table Text Block]
Schedule of Employee Service Share based Compensation Allocation of Recognized Period Costs by Award Type [Table Text Block]
Exclusive Networks Group [Member]
Exclusive Networks Group [Member]
Exclusive Networks Group [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]
Accrued liabilities
Increase (Decrease) in Accrued Liabilities
Cost of product revenue
Cost of Goods Sold [Member]
Cost of Goods Sold [Member]
Schedule of Share-based Compensation, Restricted Stock Units Award Activity
Share-based Payment Arrangement, Restricted Stock Unit, Activity [Table Text Block]
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]
Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]
Income Tax Liabilities - Non-current [Member]
Income Tax Liabilities - Non-current [Member]
Income Tax Liabilities - Non-current [Member]
OPAQ Networks, Inc (OPAQ)
OPAQ Networks, Inc (OPAQ) [Member]
OPAQ Networks, Inc (OPAQ)
Cash payments to purchase real estate
Payments to Acquire Property, Plant, and Equipment
Total liabilities
Liabilities
Thereafter
Finite-Lived Intangible Asset, Expected Amortization, After Year Four
Finite-Lived Intangible Asset, Expected Amortization, After Year Four
2021
Finite-Lived Intangible Asset, Expected Amortization, Year One
Granted (in dollars per share)
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price
Options outstanding, Aggregate intrinsic value
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value
Segment managers responsible for operations (in segment managers)
Number of Segment Managers Responsible for Operations
Number of Segment Managers Responsible for Operations
Net operating loss carryforwards
Operating Loss Carryforwards
Common Stock, shares issued
Common Stock, Shares, Issued
Individual Owning Less Than 10 Percent of Stock
Individual Owning Less Than 10 Percent of Stock [Member]
Individual Owning Less Than 10 Percent of Stock [Member]
Inventory purchase commitments
Purchase Obligation, Fiscal Year Maturity [Abstract]
Basis of Presentation and Preparation
Presentation and Preparation of Consolidated Financial Statements [Policy Text Block]
Presentation and Preparation of Consolidated Financial Statements [Policy Text Block]
Entity Address, City or Town
Entity Address, City or Town
Interest costs capitalized
Interest Costs Capitalized
Schedule of Aggregate Changes in Unrecognized Tax Benefits
Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block]
Balance Sheet Location [Axis]
Balance Sheet Location [Axis]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position [Abstract]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position [Abstract]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position [Abstract]
Measurement Frequency [Domain]
Measurement Frequency [Domain]
INTEREST EXPENSE
Interest Expense
Accrued payroll and compensation
Increase (Decrease) in Employee Related Liabilities
Capitalized research expenditures
Deferred Tax Assets, Research and Development Capitalized
Deferred Tax Assets, Research and Development Capitalized
Deferred:
Deferred Income Tax Expense (Benefit), Continuing Operations [Abstract]
Audit Information [Abstract]
Audit Information
Effective Interest Rate
Debt Instrument, Interest Rate, Effective Percentage
Initial term
Mutual Covenant-Not-to-Sue Agreement, Patent Claims, Initial Term
Mutual Covenant-Not-to-Sue Agreement, Patent Claims, Initial Term
Purchase price
Net purchase consideration
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net
Amortization of deferred contract costs
Capitalized Contract Cost, Amortization
Accumulated deficit
Retained Earnings (Accumulated Deficit)
Option contractual term
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period
Statement of Stockholders' Equity [Abstract]
Statement of Stockholders' Equity [Abstract]
Shares issued under the ESPP (in shares)
Stock Issued During Period, Shares, Employee Stock Purchase Plans
Entity Filer Category
Entity Filer Category
Risk-free interest rate
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate
Concentration Risk [Table]
Concentration Risk [Table]
Fair Value [Member]
Estimate of Fair Value Measurement [Member]
Inventory Disclosure [Abstract]
Inventory Disclosure [Abstract]
Finite-Lived Intangible Assets by Major Class [Axis]
Finite-Lived Intangible Assets by Major Class [Axis]
Total equity
Balance, beginning of period
Balance, end of period
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest
Amendment Flag
Amendment Flag
Proceeds from long-term borrowings, net of discount and underwriting fees
Proceeds from Issuance of Long-term Debt
Equity Components [Axis]
Equity Components [Axis]
Antidilutive Securities Excluded from Computation of Earnings Per Share, by Antidilutive Securities [Axis]
Antidilutive Securities [Axis]
Sales and marketing
Selling and Marketing Expense [Member]
Disaggregation of Revenue [Table]
Disaggregation of Revenue [Table]
Concentration Risk Type [Domain]
Concentration Risk Type [Domain]
Inventory
Inventory
Inventory, Net
Granted (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures
Federal
Deferred Federal Income Tax Expense (Benefit)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Thereafter
Lessee, Operating Lease, Liability, to be Paid, after Year Five
Product and Service [Axis]
Product and Service [Axis]
Investments in equity securities of privately-held companies
Equity Securities without Readily Determinable Fair Value, Amount
Entity Public Float
Entity Public Float
Documents Incorporated by Reference
Documents Incorporated by Reference [Text Block]
CyberSponse, Inc.
CyberSponse, Inc. [Member]
CyberSponse, Inc. [Member]
Short-term lease expense
Short-term Lease, Cost
Gross decreases for tax positions related to the current year
Unrecognized Tax Benefits, Decrease Resulting from Current Period Tax Positions
Sales and marketing
Selling and Marketing Expense
Stock repurchased (in shares)
Stock Repurchased During Period, Shares
Foreign currency translation adjustment
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax
Other liabilities
Increase (Decrease) in Accrued Liabilities and Other Operating Liabilities
Statement [Line Items]
Statement [Line Items]
Deferred revenue
Increase (Decrease) in Contract with Customer, Liability
Reserves and accruals
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals
Short-term investments, minimum original maturity
Investments, Classification as Short-term, Minimum Original Maturity
Investments, Classification as Short-term, Minimum Original Maturity
Weighted- Average Exercise Price
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
Federal [Member]
Domestic Tax Authority [Member]
Fair Value
Fair Value
Investments, Fair Value Disclosure
Debt Securities, Available-for-sale
Debt Disclosure [Abstract]
Property, Plant and Equipment by Type [Axis]
Long-Lived Tangible Asset [Axis]
Less: Valuation allowance
Deferred Tax Assets, Valuation Allowance
Customer [Axis]
Customer [Axis]
Foreign tax credit
Effective Income Tax Rate Reconciliation, Tax Credit, Foreign, Amount
Schedule of Business Acquisitions, by Acquisition [Table]
Schedule of Business Acquisitions, by Acquisition [Table]
Document Annual Report
Document Annual Report
Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block]
Current liabilities assumed
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities
Proceeds from issuance of common stock
Proceeds from Issuance of Common Stock
Less: tax provision (benefit) related to items of other comprehensive income or loss
Other Comprehensive Income (Loss), Tax
TOTAL ASSETS
Assets
Plan Name [Domain]
Plan Name [Domain]
Cash paid for interest
Interest Paid, Excluding Capitalized Interest, Operating Activities
Geographical [Domain]
Segment, Geographical [Domain]
Geographical [Domain]
Comprehensive Income
Comprehensive Income Loss [Policy Text Block]
Comprehensive Income Loss [Policy Text Block]
Amount held in indemnity escrow
Business Combination, Consideration Transferred, Amount Held in Indemnity Escrow
Business Combination, Consideration Transferred, Amount Held in Indemnity Escrow
Non-Controlling Interests
Noncontrolling Interest [Member]
Research and development
Research and Development Expense
2031 Senior Notes
2031 Senior Notes [Member]
2031 Senior Notes
Percent of market price for non-statutory options
Share-based Compensation Arrangement by Share-based Payment Award, Minimum Exercise Price as Percent of Fair Value On Grant Date
Share-based Compensation Arrangement by Share-based Payment Award, Minimum Exercise Price as Percent of Fair Value On Grant Date
$23.83-$23.83
Price Range One [Member]
Price Range One [Member]
Estimate for sales return reserve
Contract with Customer, Refund Liability, Current
THE COMPANY AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Significant Accounting Policies [Text Block]
Performance obligation expected recognition period
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period
Cumulative Effect, Period of Adoption [Domain]
Cumulative Effect, Period of Adoption [Domain]
Net cash provided by operating activities
Net Cash Provided by (Used in) Operating Activities
Tax credit carryforwards
Tax Credit Carryforward, Amount
Fair Value, Recurring and Nonrecurring [Table]
Fair Value, Recurring and Nonrecurring [Table]
Furniture and fixtures
Furniture and Fixtures [Member]
Schedule of Long-term Debt Instruments [Table]
Schedule of Long-term Debt Instruments [Table]
Subsequent Event [Line Items]
Subsequent Event [Line Items]
Basic (in shares)
Weighted-average common shares outstanding-basic (in shares)
Weighted Average Number of Shares Outstanding, Basic
Diluted (in dollars per share)
Diluted (in dollars per share)
Earnings Per Share, Diluted
2026 Senior Notes
2026 Senior Notes [Member]
2026 Senior Notes
Effect of potentially dilutive securities:
Incremental Weighted Average Shares Attributable to Dilutive Effect [Abstract]
2016 Share Repurchase Program
Share Repurchase Program [Member]
Share Repurchase Program [Member]
Summary of Inventory Purchase Commitments
Contractual Obligation, Fiscal Year Maturity [Table Text Block]
Award expiration period
Share-based Compensation Arrangement by Share-based Payment Award, Award Expiration Period
Share-based Compensation Arrangement by Share-based Payment Award, Award Expiration Period
Cash paid for income taxes—net
Income Taxes Paid, Net
Leasehold improvements
Leaseholds and Leasehold Improvements [Member]
Other Intangible Assets
Intangible Assets, Finite-Lived, Policy [Policy Text Block]
Accounting Standards Update [Extensible List]
Accounting Standards Update [Extensible Enumeration]
Comprehensive income attributable to Fortinet, Inc.
Comprehensive Income (Loss), Net of Tax, Attributable to Parent
OTHER INTANGIBLE ASSETS—NET
Intangible Assets, Net (Excluding Goodwill)
Deferred tax liability recorded
Deferred Income Tax Liabilities, Net
Business Acquisition, Acquiree [Domain]
Business Acquisition, Acquiree [Domain]
Property and equipment
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment
Corporate debt securities
Corporate Debt Securities [Member]
Schedule of Effective Income Tax Rate Reconciliation
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]
Accounts payable
Accounts Payable, Current
Employee
Employee [Member]
Employee [Member]
Depreciation and amortization
Depreciation, Depletion and Amortization
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]
Revenue recognition period (in years)
Revenue Recognition Period
Revenue Recognition Period
Accumulated Other Comprehensive Income (Loss)
AOCI Attributable to Parent [Member]
Inventory
Increase (Decrease) in Inventories
Common Stock, shares outstanding
Common Stock, Shares, Outstanding
Ingram Micro [Member]
Ingram Micro [Member]
Ingram Micro [Member]
LONG-TERM INVESTMENTS
Long-term Investments
Financial Instruments [Domain]
Financial Instruments [Domain]
Total cost of revenue
Cost of Goods and Services Sold
Sales Commissions [Member]
Sales Commissions [Member]
Sales Commissions [Member]
Entity Central Index Key
Entity Central Index Key
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total lease expense
Lease, Cost
Amount held in indemnity escrow, expected to be held for 36 months
Business Combination, Consideration Transferred, Amount Held in Indemnity Escrow, Portion Expected to be Held for Thirty-Six Months After Closing Date
Business Combination, Consideration Transferred, Amount Held in Indemnity Escrow, Portion Expected to be Held for Thirty-Six Months After Closing Date
Exercise Price, maximum (in dollars per share)
Share-based Payment Arrangement, Option, Exercise Price Range, Upper Range Limit
Gross decreases for tax positions related to prior year
Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions
Customer relationships
Customer Relationships [Member]
Deferred Contract Costs
Commissions Expense, Policy [Policy Text Block]
PROPERTY AND EQUIPMENT—Net
Property, Plant and Equipment Disclosure [Text Block]
OTHER LIABILITIES
Other Liabilities, Noncurrent
Schedule of Long-term Debt Instruments
Schedule of Long-term Debt Instruments [Table Text Block]
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Table]
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Table]
Debt Instrument [Line Items]
Debt Instrument [Line Items]
Trading Symbol
Trading Symbol
Pro forma revenue
Business Acquisition, Pro Forma Revenue
Thereafter
Purchase Obligation, To Be Paid, Thereafter
Purchase Obligation, To Be Paid, Thereafter
Total, Unrealized Losses
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss
Other assets
Increase (Decrease) in Other Operating Assets
Maximum stock ownership percent triggering early award expiration
Share-based Compensation Arrangement by Share-based Payment Award, Maximum Stock Ownership Percent For Options Granted to Individuals
Share-based Compensation Arrangement by Share-based Payment Award, Maximum Stock Ownership Percent For Options Granted to Individuals
Options vested and expected to vest, Outstanding (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number
Sales of investments
Proceeds from Sale of Debt Securities, Available-for-sale
Marketable equity securities
Marketable Equity Securities, Line Item [Member]
Marketable Equity Securities, Line Item
Schedule of Deferred Taxes [Table]
Schedule of Deferred Taxes [Table]
Schedule of Deferred Taxes [Table]
LONG-TERM DEBT
Total long-term debt
Long-term Debt, Excluding Current Maturities
Schedule of Goodwill [Table]
Schedule of Goodwill [Table]
Total stock-based compensation expense
Share-based Payment Arrangement, Expense
Liability incurred in connection with business combination
Business Combination, Consideration Transferred, Liabilities Incurred
Sales Revenue [Member]
Sales Revenue [Member]
Sales Revenue [Member]
Options exercisable, Weighted average remaining contractual life (in years)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term
Net income per share attributable to Fortinet, Inc. common stockholders:
Earnings Per Share, Basic and Diluted [Abstract]
Warranties [Line Items]
Warranties [Line Items]
Warranties [Line Items]
NET INCOME INCLUDING NON-CONTROLLING INTERESTS
Net income including non-controlling interests
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest
Schedule of Income before Income Tax, Domestic and Foreign
Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block]
Liabilities assumed
TOTAL LIABILITIES
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities
Construction-in-progress
Construction in Progress [Member]
CASH AND CASH EQUIVALENTS—Beginning of year
CASH AND CASH EQUIVALENTS—End of year
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions And Allocation of Recognized Period Costs [Table Text Block]
Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. Tabular disclosure of the allocation of equity-based compensation costs to a given line item on the balance sheet and income statement for the period. This may include the reporting line for the costs and the amount capitalized and expensed.
Indemnity funds held in escrow, received by the company
Business Combination, Consideration Transferred, Amount Held in Indemnity Escrow, Portion Received By The Company
Business Combination, Consideration Transferred, Amount Held in Indemnity Escrow, Portion Received By The Company
Common Stock, par value (dollars per share)
Common Stock, Par or Stated Value Per Share
Statement of Comprehensive Income [Abstract]
CURRENT ASSETS:
Assets, Current [Abstract]
Other
Proceeds from (Payments for) Other Financing Activities
Gross
Finite-Lived Intangible Assets, Gross
Schedule of Finite-Lived Intangible Assets by Major Class
Schedule of Finite-Lived Intangible Assets [Table Text Block]
Impairment of Long-Lived Assets
Impairment or Disposal of Long-Lived Assets, Policy [Policy Text Block]
Deferred revenue
Deferred Revenue, Current
Money market funds
Money Market Funds, Excluding Commercial Paper [Member]
Money Market Funds, Excluding Commercial Paper [Member]
Change in unrealized gains (losses) on investments
OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment and Tax
Exercised (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period
Exercise Price Range [Domain]
Exercise Price Range [Domain]
Other comprehensive income (loss)
Other Comprehensive Income (Loss), Net of Tax
Recurring
Fair Value, Recurring [Member]
Gross decreases for tax positions related to expiration of statute of limitations
Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations
Measurement Basis [Axis]
Measurement Basis [Axis]
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]
Financial Instruments and Fair Value
Fair Value of Financial Instruments, Policy [Policy Text Block]
Auditor Firm ID
Auditor Firm ID
Transfers of evaluation units from inventory to property and equipment
Transfers of Evaluation Units from Inventory to Property and Equipment
Transfers of Evaluation Units from Inventory to Property and Equipment
Purchases of investment in privately held company
Purchase of investment in privately held company
Payments to Acquire Equity Method Investments
Other comprehensive income (loss):
Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent [Abstract]
Net cash used in investing activities
Net Cash Provided by (Used in) Investing Activities
Portion at Fair Value Measurement [Member]
Portion at Fair Value Measurement [Member]
Buildings and improvements
Building and Building Improvements [Member]
Vested (in dollars per share)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value
Class of Stock [Domain]
Class of Stock [Domain]
Cash consideration
Payments to Acquire Businesses, Gross
Foreign currency translation adjustments
Goodwill, Foreign Currency Translation Gain (Loss)
Segment Reporting Information [Line Items]
Segment Reporting Information [Line Items]
Latin America
Latin America [Member]
Payments for legal settlements
Payments for Legal Settlements
Debt Instrument, Name [Domain]
Debt Instrument, Name [Domain]
Individual Owning 10 Percent or More of Stock
Individual Owning 10 Percent or More of Stock [Member]
Individual Owning 10 Percent or More of Stock [Member]
Total proceeds if extension option utilized
Mutual Covenant-Not-to-Sue Agreement, Patent Claims, Total Proceeds Expected If Extension Option Utilized
Mutual Covenant-Not-to-Sue Agreement, Patent Claims, Total Proceeds Expected If Extension Option Utilized
Deferred Taxes [Line Items]
Deferred Taxes [Line Items]
Deferred Taxes [Line Items]
Tax at federal statutory tax rate
Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount
Options Outstanding, Number Outstanding (in shares)
Share-based Payment Arrangement, Option, Exercise Price Range, Shares Outstanding
Technical Support and Other [Member]
Technical Support and Other [Member]
Technical Support and Other [Member]
Inventory
Inventory, Policy [Policy Text Block]
Foreign
Current Foreign Tax Expense (Benefit)
Developed technology
Developed Technology Rights [Member]
Due within one year
Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, Year One
Concentration Risk by Benchmark [Axis]
Concentration Risk Benchmark [Axis]
Amount held in indemnity escrow, expected to be held for 12 months
Business Combination, Consideration Transferred, Amount Held in Indemnity Escrow, Portion Expected to be Held for Twelve Months After Closing Date
Business Combination, Consideration Transferred, Amount Held in Indemnity Escrow, Portion Expected to be Held for Twelve Months After Closing Date
Schedule of Finite-Lived Intangible Assets by Major Class [Table]
Schedule of Finite-Lived Intangible Assets [Table]
Accounting Standards Update 2018-02 [Member]