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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, 2019
Nov. 30, 2018
Assets    
Derivative financial instruments $ 29  
Liabilities    
Derivative financial instruments 26 $ 29
Financial Instruments Measured at Fair Value on a Recurring Basis | Level 1    
Assets    
Restricted cash 14 14
Total 1,215 996
Financial Instruments Measured at Fair Value on a Recurring Basis | Level 1 | Money market funds    
Assets    
Cash and cash equivalents 1,202 982
Financial Instruments Measured at Fair Value on a Recurring Basis | Level 2    
Assets    
Total 25  
Liabilities    
Total 22 29
Financial Instruments Measured at Fair Value on a Recurring Basis | Level 2 | Derivative financial instruments, assets    
Assets    
Derivative financial instruments 25  
Financial Instruments Measured at Fair Value on a Recurring Basis | Level 2 | Derivative financial instruments, liabilities    
Liabilities    
Derivative financial instruments $ 22 $ 29