XML 55 R41.htm IDEA: XBRL DOCUMENT v3.4.0.3

Disclosures About Defined Pension Benefit Obligations (Defined Contribution Plans) (Details) $ in Thousands	6 Months Ended
	Apr. 01, 2016 USD ($)
Defined Benefit Pension Plans And Defined Benefit Postretirement Plans Disclosure [Abstract]
Cash contributions made during the first six months of fiscal 2016	$ 18,266
Cash contributions we expect to make during the remainder of fiscal 2016	16,256
Total	$ 34,522

X

- Definition

Expected contributions to funded pension plans.

+ References

No definition available.

+ Details

Name:	jec_ExpectedContributionsToFundedPensionPlans
Namespace Prefix:	jec_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Expected Pension Contributions

+ References

No definition available.

+ Details

Name:	jec_ExpectedPensionContributions
Namespace Prefix:	jec_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	us-gaap_DefinedBenefitPensionPlansAndDefinedBenefitPostretirementPlansDisclosureAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The amount of cash or cash equivalents contributed by the entity to fund its pension plans.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 25
-Subparagraph (g)
-URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3536-108585

+ Details

Name:	us-gaap_PensionContributions
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration