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Fair Value Measurements, Derivative Instruments and Hedging Activities and Financial Risks - Estimated Fair Value and Basis of Valuation of Financial Instrument Assets And Liabilities Measured at Fair Value on Recurring Basis (Details) - USD ($)
$ in Millions
Aug. 31, 2018
Nov. 30, 2017
Assets    
Derivative financial instruments $ 5 $ 15
Liabilities    
Derivative financial instruments 40 161
Financial Instruments Measured at Fair Value on a Recurring Basis | Level 1    
Assets    
Restricted cash 15 26
Total 547 518
Financial Instruments Measured at Fair Value on a Recurring Basis | Level 1 | Money market funds    
Assets    
Cash and cash equivalents 526 395
Financial Instruments Measured at Fair Value on a Recurring Basis | Level 1 | Marketable securities held in rabbi trusts    
Assets    
Marketable securities held in rabbi trusts 6 97
Financial Instruments Measured at Fair Value on a Recurring Basis | Level 2    
Assets    
Total 5 15
Liabilities    
Total 40 161
Financial Instruments Measured at Fair Value on a Recurring Basis | Level 2 | Derivative financial instruments    
Assets    
Derivative financial instruments 5 15
Financial Instruments Measured at Fair Value on a Recurring Basis | Level 2 | Derivative financial instruments    
Liabilities    
Derivative financial instruments $ 40 $ 161