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Equity Plans - Share Based Compensation (Details) - USD ($)
$ / shares in Units, shares in Millions
12 Months Ended
Aug. 31, 2017
Sep. 01, 2016
Sep. 03, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Number of shares available for future awards (in shares) 101    
Employee stock option      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]      
Number of shares outstanding (in shares) 42    
Number of shares granted (in shares) 8 8 8
Number of shares exercised (in shares) (14)    
Number of shares canceled or expired (in shares) (3)    
Number of shares outstanding (in shares) 33 42  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]      
Weighted average exercise price per share for options outstanding (in dollars per share) $ 16.37    
Weighted average exercise price per share for options granted (in dollars per share) 19.61    
Weighted average exercise price per share for options exercised (in dollars per share) 10.17    
Weighted average exercise price per share for options canceled or expired (in dollars per share) 22.55    
Weighted average exercise price per share for options outstanding (in dollars per share) $ 19.32 $ 16.37  
Share-based Compensation Arrangement by Share-based Payment Award Options, Outstanding, Additiona Disclosures [Abstract]      
Weighted average remaining contractual term for options outstanding (in years) 4 years 5 months    
Aggregated intrinsic value for options outstanding $ 438,000,000    
Options exercisable (in shares) 17    
Weighted average exercise price per share for options exercisable (in dollars per share) $ 17.44    
Weighted average remaining contractual term for options exercisable (in years) 2 years 8 months    
Aggregated intrinsic value for options exercisable $ 255,000,000    
Options unvested (in shares) 16    
Weighted average exercise price per share for options unvested (in dollars per share) $ 21.25    
Weighted average remaining contractual term for options unvested (in years) 6 years 2 months    
Aggregated intrinsic value for options unvested $ 183,000,000    
Share-based Compensation Arrangement by Share-based Payment Award, Additional General Disclosures [Abstract]      
Total intrinsic value for option exercised $ 198,000,000 $ 52,000,000 $ 229,000,000
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]      
Fair Value Assumptions, Method Used Black-Scholes    
Stock options granted (in shares) 8 8 8
Weighted-average grant-date fair values per share of options granted during period (in dollars per share) $ 8.68 $ 6.94 $ 14.79
Average expected life (in years) 5 years 6 months 5 years 6 months 5 years 7 months
Weighted-average expected volatility (in hundredths) 46.00% 47.00% 45.00%
Weighted-average risk-free interest rate (in hundredths) 1.80% 1.70% 1.70%
Expected dividends assumed in estimated option values $ 0 $ 0 $ 0
Employee stock option | Minimum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock option annual incremental vesting (percentage) 25.00%    
Employee stock option | Maximum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock option annual incremental vesting (percentage) 33.00%    
Employee stock option | Awards Granted After February 2014      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
General number of years from grant date until stock options expire (in years) 8 years    
Employee stock option | Awards Granted Prior to February 2014      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
General number of years from grant date until stock options expire (in years) 6 years    
Restricted stock award      
Restricted Stock Awards activity      
Number of Shares - Outstanding (in shares) 18    
Number of Shares - Granted (in shares) 8 10 7
Number of Shares - Restrictions lapsed (in shares) (6)    
Number of Shares - Canceled (in shares) (1)    
Number of Shares - Outstanding (in shares) 19 18  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]      
Weighted Average Grant Date Fair Value Per Share - Outstanding (in dollars per share) $ 20.24    
Weighted Average Grant Date Fair Value Per Share - Granted (in dollars per share) 18.77 $ 15.40 $ 32.60
Weighted Average Grant Date Fair Value Per Share - Restrictions lapsed (in dollars per share) 19.53    
Weighted Average Grant Date Fair Value Per Share - Cancelled (in dollars per share) 20.59    
Weighted Average Grant Date Fair Value Per Share - Outstanding (in dollars per share) $ 19.78 $ 20.24  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract]      
Restricted stock awards granted (in shares) 8 10 7
Weighted-average grant-date fair values per share (in dollars per share) $ 18.77 $ 15.40 $ 32.60
Aggregate vesting-date fair value of shares vested $ 115,000,000 $ 71,000,000 $ 155,000,000
Restricted stock award | Performance-based awards (Tranche One)      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract]      
Restricted award vesting period 3 years    
Restricted stock award | Performance-based awards (Tranche One) | Minimum      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract]      
Restricted award vesting rights, percentage 0.00%    
Restricted stock award | Performance-based awards (Tranche One) | Maximum      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract]      
Restricted award vesting rights, percentage 200.00%    
Restricted stock award | Market-based awards (Tranche Two)      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract]      
Restricted award vesting period 3 years    
Restricted stock award | Market-based awards (Tranche Two) | Minimum      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract]      
Restricted award vesting rights, percentage 0.00%    
Restricted stock award | Market-based awards (Tranche Two) | Maximum      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract]      
Restricted award vesting rights, percentage 200.00%    
Restricted stock award | Service-based awards (Tranche Three)      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock option annual incremental vesting (percentage) 25.00%    
Restricted stock award, performance and market based awards      
Restricted Stock Awards activity      
Number of Shares - Outstanding (in shares) 3