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Acquisitions (Details) - USD ($)
$ in Millions
4 Months Ended 12 Months Ended
Mar. 17, 2020
Aug. 30, 2020
Aug. 30, 2020
Sep. 01, 2019
Sep. 02, 2018
Business Combinations [Abstract]          
Payments to Acquire Businesses, Gross $ 998        
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets 283        
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities 219        
Business Acquisition, Goodwill, Expected Tax Deductible Amount $ 934        
Payments to Acquire Businesses and Interest in Affiliates   $ 25 $ 1,163 $ 0 $ 0