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, 2019	Nov. 30, 2018
Carrying Value
Assets
Long-term other assets	$ 123	$ 127
Total	123	127
Liabilities
Total	11,697	10,394
Carrying Value | Fixed rate debt
Liabilities
Debt	6,875	5,699
Carrying Value | Floating rate debt
Liabilities
Debt	4,822	4,695
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	31	30
Total	31	30
Liabilities
Total	11,897	10,526
Fair Value | Level 2 | Fixed rate debt
Liabilities
Debt	7,030	5,799
Fair Value | Level 2 | Floating rate debt
Liabilities
Debt	4,867	4,727
Fair Value | Level 3
Assets
Long-term other assets	91	95
Total	91	95
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