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. 29, 2020	Nov. 30, 2019
Carrying Value
Assets
Long-term other assets	$ 177	$ 181
Total	177	181
Liabilities
Total	13,091	11,634
Carrying Value | Fixed rate debt
Liabilities
Debt	7,351	7,438
Carrying Value | Floating rate debt
Liabilities
Debt	5,740	4,195
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	30	31
Total	30	31
Liabilities
Total	13,204	12,030
Fair Value | Level 2 | Fixed rate debt
Liabilities
Debt	7,548	7,782
Fair Value | Level 2 | Floating rate debt
Liabilities
Debt	5,656	4,248
Fair Value | Level 3
Assets
Long-term other assets	145	149
Total	145	149
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