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Changes in Estimates (Details) - USD ($) $ / shares in Units, $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Dec. 28, 2018 | Dec. 29, 2017 | Dec. 28, 2018 | Dec. 29, 2017
Change in Accounting Estimate [Line Items] |  |  |  |
Revenue recognized from performance obligations satisfied in prior periods | $ 9 | $ 16 | $ 16 | $ 30
Contracts Accounted for under Percentage of Completion |  |  |  |
Change in Accounting Estimate [Line Items] |  |  |  |
Operating income (loss) | $ 2 | $ (16) | $ (1) | $ (11)
Operating income (loss), per diluted share (in dollars per share) | $ 0.02 | $ (0.09) |  | $ (0.06)
Operating income (loss), net of tax |  | $ (11) |  | $ (8)

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