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Revenue Accounting for Contracts / Accounting for Joint Ventures (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
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Jun. 29, 2018 | Jun. 30, 2017 | Jun. 29, 2018 | Jun. 30, 2017
Revenue Accounting For Contracts Accounting For Joint Ventures [Abstract] |  |  |  |
Pass-through costs included in revenues | $ 889,147 | $ 628,070 | $ 2,198,197 | $ 1,861,615

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- Definition Revenue accounting for contracts / accounting for joint ventures. + References No definition available. + Details
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