Fair Value Measurements, Derivative Instruments and Hedging Activities and Financial Risks - Estimated Carrying and Fair Values of Financial Instrument Assets and Liabilities Not Measured at Fair Value on Recurring Basis (Details) - USD ($) $ in Millions	Feb. 28, 2021	Nov. 30, 2020
Carrying Value
Assets
Long-term other assets	$ 47	$ 45
Total	47	45
Liabilities
Total	32,065	27,581
Carrying Value | Fixed rate debt
Liabilities
Debt	19,198	15,547
Carrying Value | Floating rate debt
Liabilities
Debt	12,868	12,034
Fair Value | Level 1
Assets
Long-term other assets	0	0
Total	0	0
Liabilities
Total	0	0
Fair Value | Level 1 | Fixed rate debt
Liabilities
Debt	0	0
Fair Value | Level 1 | Floating rate debt
Liabilities
Debt	0	0
Fair Value | Level 2
Assets
Long-term other assets	25	17
Total	25	17
Liabilities
Total	32,526	27,670
Fair Value | Level 2 | Fixed rate debt
Liabilities
Debt	20,313	16,258
Fair Value | Level 2 | Floating rate debt
Liabilities
Debt	12,213	11,412
Fair Value | Level 3
Assets
Long-term other assets	19	18
Total	19	18
Liabilities
Total	0	0
Fair Value | Level 3 | Fixed rate debt
Liabilities
Debt	0	0
Fair Value | Level 3 | Floating rate debt
Liabilities
Debt	$ 0	$ 0