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Income Taxes (Gross Unrecognized Tax Benefits) (Details) - USD ($)
$ in Millions
12 Months Ended
Aug. 29, 2021
Aug. 30, 2020
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]    
Gross unrecognized tax benefit at beginning of year $ 30 $ 27
Gross increases—current year tax positions 2 1
Gross increases—tax positions in prior years 2 8
Gross decreases—tax positions in prior years 0 (3)
Lapse of statute of limitations (1) (3)
Gross unrecognized tax benefit at end of year $ 33 $ 30