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Other Financial Information Other Financial Information (Components of Receivables) (Details) - USD ($) $ in Thousands | Sep. 27, 2019 | Sep. 28, 2018
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Components of receivables: |  |
Amounts billed, net | $ 1,222,339 | $ 1,107,250
Unbilled receivables and other | 1,216,028 | 1,393,246
Contract assets | 401,842 | 13,438
Total receivables and contract assets, net | 2,840,209 | 2,513,934
Other information about receivables: |  |
Amounts due from the United States federal government included above, net of advanced billings | $ 630,975 | $ 472,846

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