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Income Tax Expense - Domestic and Foreign Components of Income Before Income Taxes (Details) - USD ($)
$ in Millions
12 Months Ended
Jul. 03, 2020
Jun. 28, 2019
Jun. 29, 2018
Income Tax Disclosure [Abstract]      
Foreign $ (695) $ (642) $ 2,398
Domestic 649 355 (313)
Income (loss) before taxes $ (46) $ (287) $ 2,085