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Equity - Outstanding Capped Calls (Details) - USD ($)
shares in Millions
3 Months Ended
Dec. 01, 2016
Dec. 31, 2016
Sep. 01, 2016
Option Indexed to Issuer's Equity [Line Items]      
Treasury Stock, held (in shares) 54   54
Call Option | Purchased options | Minimum      
Option Indexed to Issuer's Equity [Line Items]      
Range of value at expiration of outstanding capped calls $ 0    
Call Option | Purchased options | Maximum      
Option Indexed to Issuer's Equity [Line Items]      
Range of value at expiration of outstanding capped calls $ 719,000,000    
Call Option | Purchased options | 2032C and 2032D convertible senior notes | Subsequent Event      
Option Indexed to Issuer's Equity [Line Items]      
Capped call settlement shares received   4  
Capped call settlement, dollar value of shares received   $ 67,000,000  
Treasury Stock, held (in shares)   4