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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, 2020
Nov. 30, 2019
Assets    
Derivative financial instruments   $ 58
Liabilities    
Derivative financial instruments $ 12 25
Financial Instruments Measured at Fair Value on a Recurring Basis | Level 1    
Assets    
Restricted cash 15 13
Total 6,896 530
Financial Instruments Measured at Fair Value on a Recurring Basis | Level 1 | Money market funds    
Assets    
Cash and cash equivalents 6,881 518
Financial Instruments Measured at Fair Value on a Recurring Basis | Level 2    
Assets    
Total   58
Liabilities    
Total 12 25
Financial Instruments Measured at Fair Value on a Recurring Basis | Level 2 | Derivative financial instruments, assets    
Assets    
Derivative financial instruments   58
Financial Instruments Measured at Fair Value on a Recurring Basis | Level 2 | Derivative financial instruments, liabilities    
Liabilities    
Derivative financial instruments $ 12 $ 25