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Receivables and Contract Assets (Details) - USD ($) $ in Thousands | Jun. 26, 2020 | Sep. 27, 2019
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Components of receivables and contract assets: |  |
Amounts billed, net | $ 1,395,745 | $ 1,222,339
Unbilled receivables and other | 1,301,494 | 1,216,028
Contract assets | 456,425 | 401,842
Total receivables and contract assets, net | 3,153,664 | 2,840,209
Other information about receivables: |  |
Amounts due from the United States federal government, included above, net of advanced billings | $ 606,875 | $ 630,975

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- Definition Amounts due for billed services rendered or to be rendered, actions taken or to be taken, or a promise to refrain from taking certain actions in accordance with the terms of a legally binding agreement between the Company and, at a minimum, one other party. An example would be amounts billed to customers under contracts or programs but not paid as of the balance sheet date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.3(c)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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