XML 86 R70.htm IDEA: XBRL DOCUMENT
v3.25.0.1

Segment Reporting - Other Segment Items (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Segment Reporting Information [Line Items] |  |  |
Depreciation and amortization expense | $ 175.4 | $ 177.3 | $ 176.6
U.S. reportable segment | Operating Segment |  |  |
Segment Reporting Information [Line Items] |  |  |
U.S. ROA pre-tax profit depreciation and amortization expense | 188.1 | 168.1 | 156.4
Other operating segment | Operating Segment |  |  |
Segment Reporting Information [Line Items] |  |  |
Other operating segment ROA pre-tax profit depreciation and amortization expense | 27.4 | 24.7 | 23.0
Other reconciling items |  |  |
Segment Reporting Information [Line Items] |  |  |
Other reconciling items | $ (40.1) | $ (15.5) | $ (2.8)

X
- Definition Segment Reporting, Other Operating Segment Item, ROA Pre-Tax Profit Depreciation and Amortization Expense + References No definition available. + Details
Name: | fast_SegmentReportingOtherOperatingSegmentItemROAPreTaxProfitDepreciationAndAmortizationExpense
Namespace Prefix: | fast_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Segment Reporting, Other Segment Item, Other Reconciling Items + References No definition available. + Details
Name: | fast_SegmentReportingOtherSegmentItemOtherReconcilingItems
Namespace Prefix: | fast_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Segment Reporting, Segment Item, U.S. ROA Pre-Tax Profit Depreciation and Amortization Expense + References No definition available. + Details
Name: | fast_SegmentReportingSegmentItemROAPreTaxProfitDepreciationAndAmortizationExpense
Namespace Prefix: | fast_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets. + 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 280 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 48 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482785/280-10-55-48 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 49 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482785/280-10-55-49 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 270 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482964/270-10-50-1 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 32 -Subparagraph (ee) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-32 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 22 -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-22 + Details
Name: | us-gaap_DepreciationDepletionAndAmortization
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_SegmentReportingInformationLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=us-gaap_ReportableSegmentAggregationBeforeOtherOperatingSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ConsolidationItemsAxis=us-gaap_OperatingSegmentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=us-gaap_AllOtherSegmentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=fast_OtherSegmentItemOtherReconcilingItemsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |