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Debt - Debt Repurchases and Conversions (Details) - USD ($)
shares in Millions, $ in Millions
3 Months Ended 6 Months Ended
Mar. 01, 2018
Mar. 02, 2017
Mar. 01, 2018
Mar. 02, 2017
Extinguishment of Debt [Line Items]        
Decrease in Principal     $ (2,420)  
Decrease in Cash     (3,379) $ (556)
Gain (Loss) on debt repurchases and conversions $ (23) $ 0 (218) $ (2)
Corporate bonds | 2023 Notes        
Extinguishment of Debt [Line Items]        
Decrease in Principal     (1,000)  
Increase (Decrease) in Carrying Value     (991)  
Decrease in Cash     (1,046)  
Gain (Loss) on debt repurchases and conversions     (55)  
Secured Debt | 2023 Secured Notes        
Extinguishment of Debt [Line Items]        
Decrease in Principal     (1,250)  
Increase (Decrease) in Carrying Value     (1,238)  
Decrease in Cash     (1,373)  
Gain (Loss) on debt repurchases and conversions     $ (135)  
Convertible Debt        
Extinguishment of Debt [Line Items]        
Derivative, Term of Contract (in consecutive trading days)     20 days  
Convertible Debt | 2032C Notes | Settled Conversions        
Extinguishment of Debt [Line Items]        
Decrease in Principal     $ (52)  
Increase (Decrease) in Carrying Value     (49)  
Decrease in Cash     (240)  
Decrease in Equity     (195)  
Gain (Loss) on debt repurchases and conversions     $ 4  
Convertible Debt | 2033E Notes        
Extinguishment of Debt [Line Items]        
Treasury shares issued for conversion of 2033E Notes     4  
Convertible Debt | 2033E Notes | Settled Conversions        
Extinguishment of Debt [Line Items]        
Decrease in Principal [1]     $ (113)  
Increase (Decrease) in Carrying Value [1]     (143)  
Decrease in Cash [1]     (249)  
Decrease in Equity [1]     (97)  
Gain (Loss) on debt repurchases and conversions [1]     (9)  
Convertible Debt | 2033E Notes | Conversions not settled        
Extinguishment of Debt [Line Items]        
Decrease in Principal [2]     0  
Increase (Decrease) in Carrying Value [2]     137  
Decrease in Cash [2]     0  
Decrease in Equity [2]     (124)  
Gain (Loss) on debt repurchases and conversions [2]     (13)  
Principle amount of settlement obligations to be settled in cash in Q3-18     41  
Convertible Debt | 2033F Notes | Settled Conversions        
Extinguishment of Debt [Line Items]        
Decrease in Principal     (5)  
Increase (Decrease) in Carrying Value     (5)  
Decrease in Cash     (22)  
Decrease in Equity     (17)  
Gain (Loss) on debt repurchases and conversions     0  
Convertible Debt | 2033F Notes | Conversions not settled        
Extinguishment of Debt [Line Items]        
Decrease in Principal [2]     0  
Increase (Decrease) in Carrying Value [2]     101  
Decrease in Cash [2]     0  
Decrease in Equity [2]     (91)  
Gain (Loss) on debt repurchases and conversions [2]     (10)  
Principle amount of settlement obligations to be settled in cash in Q3-18     30  
Unscheduled Settlement Activities        
Extinguishment of Debt [Line Items]        
Decrease in Principal     (2,420)  
Increase (Decrease) in Carrying Value     (2,188)  
Decrease in Cash     (2,930)  
Decrease in Equity     $ (524)  
[1] Settlement included 4 million shares of our treasury stock in addition to cash.
[2] As of March 1, 2018, $41 million in principal amount of the 2033E Notes and $30 million in principal amount of the 2033F Notes had converted but not settled. These notes will settle in cash in the third quarter of 2018.