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Equity - Capped Calls (Details) - USD ($)
$ / shares in Units, shares in Millions
12 Months Ended
Aug. 29, 2019
Aug. 30, 2018
Aug. 31, 2017
Option Indexed to Issuer's Equity [Line Items]      
Value of shares received upon settlement of capped calls   $ 0 $ (125,000,000)
Treasury Stock      
Option Indexed to Issuer's Equity [Line Items]      
Value of shares received upon settlement of capped calls   $ 429,000,000 $ 67,000,000
Call Option | Purchased options      
Option Indexed to Issuer's Equity [Line Items]      
2033F capped calls, underlying common shares (in shares) 27    
2033F capped calls, initial strike price (in dollars per share) $ 10.93    
2033F capped calls, cap price (in dollars per share) $ 14.51    
Treasury shares from capped call settlement   9 4
Proceeds received upon settlement of capped calls     $ 125,000,000
Call Option | Purchased options | Treasury Stock      
Option Indexed to Issuer's Equity [Line Items]      
Value of shares received upon settlement of capped calls   $ 429,000,000 $ 67,000,000
Call Option | Purchased options | Minimum      
Option Indexed to Issuer's Equity [Line Items]      
2033F capped calls, potential value at expiration $ 0    
Call Option | Purchased options | Maximum      
Option Indexed to Issuer's Equity [Line Items]      
2033F capped calls, potential value at expiration $ 98,000,000