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Debt (Carrying Value and Estimated Fair Value of Company's Long-term Debt) (Details) - USD ($)
$ in Millions
3 Months Ended
Nov. 20, 2016
Aug. 28, 2016
Debt Instrument [Line Items]    
Total long-term debt, carrying value $ 5,092 $ 5,161
Less current portion, carrying value 1,159 1,100
Long-term debt, excluding current maturities 3,933 4,061
Total long-term debt, fair value 5,137 5,274
Less current portion, fair value 1,177 1,130
Long-term debt, excluding current portion, fair value $ 3,960 4,144
5.5% Senior Notes Due March 2017    
Debt Instrument [Line Items]    
Debt instrument, interest rate, stated percentage 5.50%  
Debt instrument, maturity date Mar. 15, 2017  
Total long-term debt, carrying value $ 1,100 1,100
5.5% Senior Notes Due March 2017 | Fair Value, Inputs, Level 2    
Debt Instrument [Line Items]    
Total long-term debt, fair value $ 1,116 1,129
1.125% Senior Notes Due December 2017    
Debt Instrument [Line Items]    
Debt instrument, interest rate, stated percentage 1.125%  
Debt instrument, maturity date Dec. 15, 2017  
Total long-term debt, carrying value $ 1,099 1,099
1.125% Senior Notes Due December 2017 | Fair Value, Inputs, Level 2    
Debt Instrument [Line Items]    
Total long-term debt, fair value $ 1,100 1,103
1.7% Senior Notes Due December 2019    
Debt Instrument [Line Items]    
Debt instrument, interest rate, stated percentage 1.70%  
Debt instrument, maturity date Dec. 15, 2019  
Total long-term debt, carrying value $ 1,197 1,196
1.7% Senior Notes Due December 2019 | Fair Value, Inputs, Level 2    
Debt Instrument [Line Items]    
Total long-term debt, fair value $ 1,201 1,219
1.75% Senior Notes Due February 2020    
Debt Instrument [Line Items]    
Debt instrument, interest rate, stated percentage 1.75%  
Debt instrument, maturity date Feb. 15, 2020  
Total long-term debt, carrying value $ 498 498
1.75% Senior Notes Due February 2020 | Fair Value, Inputs, Level 2    
Debt Instrument [Line Items]    
Total long-term debt, fair value $ 498 508
2.25% Senior Notes Due February 2022    
Debt Instrument [Line Items]    
Debt instrument, interest rate, stated percentage 2.25%  
Debt instrument, maturity date Feb. 15, 2022  
Total long-term debt, carrying value $ 497 497
2.25% Senior Notes Due February 2022 | Fair Value, Inputs, Level 2    
Debt Instrument [Line Items]    
Total long-term debt, fair value 498 512
Other Long-term Debt    
Debt Instrument [Line Items]    
Total long-term debt, carrying value 701 771
Other Long-term Debt | Fair Value, Inputs, Level 3    
Debt Instrument [Line Items]    
Total long-term debt, fair value $ 724 $ 803