XML 122 R95.htm IDEA: XBRL DOCUMENT v3.24.3

Savings and Deferred Compensation Plans - Schedule of Savings Plans Contributions (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 27, 2024	Sep. 29, 2023	Sep. 30, 2022
Savings And Deferred Compensation Plans [Abstract]
Savings plans contributions	$ 192,588	$ 160,256	$ 136,231

X

- Definition

Defined Contribution Plan Savings Plans Contributions

+ References

No definition available.

+ Details

Name:	jec_DefinedContributionPlanSavingsPlansContributions
Namespace Prefix:	jec_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Savings And Deferred Compensation Plans [Abstract]

+ References

No definition available.

+ Details

Name:	jec_SavingsAndDeferredCompensationPlansAbstract
Namespace Prefix:	jec_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration