XML 68 R56.htm IDEA: XBRL DOCUMENT
v3.25.2

Income Taxes (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Jun. 27, 2025 | Jun. 28, 2024 | Jun. 27, 2025 | Jun. 28, 2024
Income Tax Disclosure [Abstract] |  |  |  |
Effective income tax rate | 21.90% | 33.20% | 45.60% | 14.90%
U.S tax unfavorable tax impacts |  |  | $ 63.1 |
Change in indefinite reinvestment assertion in foreign subsidiary |  |  |  | $ 61.6

X
- Definition Effective Income Tax Rate Reconciliation, Deferred Tax Expense (Benefit), Change in Indefinite Reinvestment Assertion in Foreign Subsidiary + References No definition available. + Details
Name: | jec_EffectiveIncomeTaxRateReconciliationDeferredTaxExpenseBenefitChangeInIndefiniteReinvestmentAssertionInForeignSubsidiary
Namespace Prefix: | jec_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Effective Income Tax Rate Reconciliation, Retained Interest Disallowing Tax Benefit + References No definition available. + Details
Name: | jec_EffectiveIncomeTaxRateReconciliationRetainedInterestDisallowingTaxBenefit
Namespace Prefix: | jec_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 12 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482685/740-10-50-12 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 231 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482663/740-10-55-231 + Details
Name: | us-gaap_EffectiveIncomeTaxRateContinuingOperations
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

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