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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
May 31, 2018
Nov. 30, 2017
Assets    
Derivative financial instruments $ 6 $ 15
Liabilities    
Derivative financial instruments 59 161
Financial Instruments Measured at Fair Value on a Recurring Basis | Level 1    
Assets    
Restricted cash 15 26
Total 1,075 518
Financial Instruments Measured at Fair Value on a Recurring Basis | Level 1 | Money market funds    
Assets    
Cash and cash equivalents 1,053 395
Financial Instruments Measured at Fair Value on a Recurring Basis | Level 1 | Marketable securities held in rabbi trusts    
Assets    
Investments 7 97
Financial Instruments Measured at Fair Value on a Recurring Basis | Level 2    
Assets    
Total 6 15
Liabilities    
Total 59 161
Financial Instruments Measured at Fair Value on a Recurring Basis | Level 2 | Derivative financial instruments, assets    
Assets    
Derivative financial instruments 6 15
Financial Instruments Measured at Fair Value on a Recurring Basis | Level 2 | Derivative financial instruments, liabilities    
Liabilities    
Derivative financial instruments $ 59 $ 161