XML 51 R41.htm IDEA: XBRL DOCUMENT
v3.25.3

Property and Equipment—Net (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2025 | Jun. 30, 2025 | Mar. 31, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024 | Dec. 31, 2024
Property, Plant and Equipment, Net, by Type [Abstract] |  |  |  |  |  |  |
Total property and equipment | $ 2,067.6 |  |  |  | $ 2,067.6 |  | $ 1,765.6
Less: accumulated depreciation | (462.4) |  |  |  | (462.4) |  | (416.1)
Property and equipment—net | 1,605.2 |  |  |  | 1,605.2 |  | 1,349.5
Purchase of property and equipment |  |  |  |  | 322.0 | $ 281.3 |
Depreciation expense | 25.3 |  |  | $ 24.5 | 74.4 | $ 76.0 |
Frankfurt, Germany |  |  |  |  |  |  |
Property, Plant and Equipment, Net, by Type [Abstract] |  |  |  |  |  |  |
Purchase of property and equipment |  |  | $ 54.5 |  |  |  |
Canada, United States And Netherlands |  |  |  |  |  |  |
Property, Plant and Equipment, Net, by Type [Abstract] |  |  |  |  |  |  |
Purchase of property and equipment |  | $ 130.5 |  |  |  |  |
Canada And United Kingdom |  |  |  |  |  |  |
Property, Plant and Equipment, Net, by Type [Abstract] |  |  |  |  |  |  |
Purchase of property and equipment | 70.8 |  |  |  |  |  |
Land |  |  |  |  |  |  |
Property, Plant and Equipment, Net, by Type [Abstract] |  |  |  |  |  |  |
Total property and equipment | 592.4 |  |  |  | 592.4 |  | 500.6
Land | Frankfurt, Germany |  |  |  |  |  |  |
Property, Plant and Equipment, Net, by Type [Abstract] |  |  |  |  |  |  |
Total property and equipment |  |  | 16.8 |  |  |  |
Land | Canada, United States And Netherlands |  |  |  |  |  |  |
Property, Plant and Equipment, Net, by Type [Abstract] |  |  |  |  |  |  |
Total property and equipment |  | 43.0 |  |  |  |  |
Land | Canada And United Kingdom |  |  |  |  |  |  |
Property, Plant and Equipment, Net, by Type [Abstract] |  |  |  |  |  |  |
Total property and equipment | 37.5 |  |  |  | 37.5 |  |
Buildings and improvements |  |  |  |  |  |  |
Property, Plant and Equipment, Net, by Type [Abstract] |  |  |  |  |  |  |
Total property and equipment | 974.1 |  |  |  | 974.1 |  | 801.4
Buildings and improvements | Frankfurt, Germany |  |  |  |  |  |  |
Property, Plant and Equipment, Net, by Type [Abstract] |  |  |  |  |  |  |
Total property and equipment |  |  | $ 37.7 |  |  |  |
Buildings and improvements | Canada, United States And Netherlands |  |  |  |  |  |  |
Property, Plant and Equipment, Net, by Type [Abstract] |  |  |  |  |  |  |
Total property and equipment |  | $ 87.5 |  |  |  |  |
Buildings and improvements | Canada And United Kingdom |  |  |  |  |  |  |
Property, Plant and Equipment, Net, by Type [Abstract] |  |  |  |  |  |  |
Total property and equipment | 33.3 |  |  |  | 33.3 |  |
Computer equipment and software |  |  |  |  |  |  |
Property, Plant and Equipment, Net, by Type [Abstract] |  |  |  |  |  |  |
Total property and equipment | 324.5 |  |  |  | 324.5 |  | 279.1
Leasehold improvements |  |  |  |  |  |  |
Property, Plant and Equipment, Net, by Type [Abstract] |  |  |  |  |  |  |
Total property and equipment | 64.4 |  |  |  | 64.4 |  | 64.3
Evaluation units |  |  |  |  |  |  |
Property, Plant and Equipment, Net, by Type [Abstract] |  |  |  |  |  |  |
Total property and equipment | 23.4 |  |  |  | 23.4 |  | 31.8
Furniture and fixtures |  |  |  |  |  |  |
Property, Plant and Equipment, Net, by Type [Abstract] |  |  |  |  |  |  |
Total property and equipment | 38.3 |  |  |  | 38.3 |  | 36.4
Construction-in-progress |  |  |  |  |  |  |
Property, Plant and Equipment, Net, by Type [Abstract] |  |  |  |  |  |  |
Total property and equipment | $ 50.5 |  |  |  | $ 50.5 |  | $ 52.0

X
- Definition Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(8)(b)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478777/944-210-S99-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(14)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482099/360-10-50-1 + Details
Name: | us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Subparagraph (b) -SubTopic 10 -Topic 230 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-28 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 220 -SubTopic 40 -Name Accounting Standards Codification -Section 55 -Paragraph 18 -Publisher FASB -URI https://asc.fasb.org/1943274/2147476153/220-40-55-18 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Topic 220 -SubTopic 40 -Name Accounting Standards Codification -Section 55 -Paragraph 11 -Publisher FASB -URI https://asc.fasb.org/1943274/2147476153/220-40-55-11 Reference 4: http://www.xbrl.org/2003/role/exampleRef -Topic 220 -SubTopic 40 -Name Accounting Standards Codification -Section 55 -Paragraph 24 -Publisher FASB -URI https://asc.fasb.org/1943274/2147476153/220-40-55-24 Reference 5: http://www.xbrl.org/2003/role/exampleRef -Topic 220 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 12 -Publisher FASB -URI https://asc.fasb.org/1943274/2147476148/220-40-50-12 Reference 6: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482099/360-10-50-1 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Topic 220 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147476148/220-40-50-6 + Details
Name: | us-gaap_Depreciation
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 230 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 13 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-13 + Details
Name: | us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(8)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478777/944-210-S99-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(13)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 360 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482099/360-10-50-1 + Details
Name: | us-gaap_PropertyPlantAndEquipmentGross
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 1 -SubTopic 10 -Topic 360 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482099/360-10-50-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 7A -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478964/842-20-50-7A Reference 3: http://www.xbrl.org/2003/role/exampleRef -Topic 852 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 10 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481372/852-10-55-10 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(8)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478777/944-210-S99-1 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 942 -SubTopic 360 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147478451/942-360-50-1 + Details
Name: | us-gaap_PropertyPlantAndEquipmentNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_PropertyPlantAndEquipmentNetByTypeAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | srt_StatementGeographicalAxis=ftnt_FrankfurtGermanyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=ftnt_CanadaUnitedStatesAndNetherlandsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=ftnt_CanadaAndUnitedKingdomMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_LandMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_BuildingAndBuildingImprovementsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_ComputerEquipmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_LeaseholdsAndLeaseholdImprovementsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=ftnt_EvaluationUnitsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_FurnitureAndFixturesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_ConstructionInProgressMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |