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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
Feb. 28, 2018
Nov. 30, 2017
Feb. 28, 2017
Nov. 30, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Cash and cash equivalents $ 453 $ 395 $ 437 $ 603
Assets        
Derivative financial instruments 17 15    
Liabilities        
Derivative financial instruments 130 161    
Financial Instruments Measured at Fair Value on a Recurring Basis | Level 1        
Assets        
Restricted cash 29 26    
Total 488 518    
Financial Instruments Measured at Fair Value on a Recurring Basis | Level 1 | Money market funds        
Assets        
Cash and cash equivalents 453 395    
Financial Instruments Measured at Fair Value on a Recurring Basis | Level 1 | Marketable securities held in rabbi trusts        
Assets        
Investments 6 97    
Financial Instruments Measured at Fair Value on a Recurring Basis | Level 2        
Assets        
Total 17 15    
Liabilities        
Total 130 161    
Financial Instruments Measured at Fair Value on a Recurring Basis | Level 2 | Derivative financial instruments        
Assets        
Derivative financial instruments 17 15    
Financial Instruments Measured at Fair Value on a Recurring Basis | Level 2 | Derivative financial instruments        
Liabilities        
Derivative financial instruments $ 130 $ 161