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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, 2021
Nov. 30, 2020
Assets    
Short-term investments $ 1,840 $ 0
Liabilities    
Derivative financial instruments 9 10
Financial Instruments Measured at Fair Value on a Recurring Basis | Level 1    
Assets    
Restricted cash 155 179
Short-term investments 1,840  
Total 11,670 9,692
Financial Instruments Measured at Fair Value on a Recurring Basis | Level 1 | Money market funds    
Assets    
Cash and cash equivalents 9,674 9,513
Financial Instruments Measured at Fair Value on a Recurring Basis | Level 2    
Liabilities    
Total 9 10
Financial Instruments Measured at Fair Value on a Recurring Basis | Level 2 | Derivative financial instruments, liabilities    
Liabilities    
Derivative financial instruments $ 9 $ 10