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Derivative Instruments - Hedging Relationship (Details) - USD ($)
$ in Millions
3 Months Ended
Nov. 30, 2017
Dec. 01, 2016
Not Designated as Hedging Instrument    
Derivative Instruments, Gain (Loss) [Line Items]    
Net gains (losses) for derivative instruments without hedge accounting designation $ (2) $ (178)
Designated as Hedging Instrument | Cash Flow Hedging    
Derivative Instruments, Gain (Loss) [Line Items]    
Net gains (losses) recognized in other comprehensive income, effective portion $ (4) $ (9)