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Pension Plans (Schedule Of Pension Plans Recorded In Accumulated Other Comprehensive Loss Not Yet Recognized As Component Of Net Periodic Pension Cost) (Details) (USD $) In Thousands | Sep. 30, 2011 | Oct. 01, 2010
--- | --- | ---
U.S. Pension Plans [Member] |  |
Net actuarial loss | $ 68,224 | $ 62,749
Prior service cost |  |
Total | 68,224 | 62,749
Non-U.S. Pension Plans [Member] |  |
Net actuarial loss | 124,560 | 202,806
Prior service cost | 1,166 | 1,569
Total | $ 125,726 | $ 204,375

X
- Definition Defined benefit plan accumulated other comprehensive income net gains losses net of tax. + Details
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X
- Definition Defined benefit plan accumulated other comprehensive income net of tax. + Details
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X
- Definition Defined benefit plan accumulated other comprehensive income net prior service cost credit net of tax. + Details
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Namespace Prefix: | jec
Data Type: | xbrli:monetaryItemType
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