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	Aug. 31, 2020	Nov. 30, 2019
Carrying Value
Assets
Long-term other assets	$ 46	$ 181
Total	46	181
Liabilities
Total	25,537	11,634
Carrying Value | Fixed rate debt
Liabilities
Debt	14,250	7,438
Carrying Value | Floating rate debt
Liabilities
Debt	11,287	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	24	31
Total	24	31
Liabilities
Total	24,080	12,030
Fair Value | Level 2 | Fixed rate debt
Liabilities
Debt	13,789	7,782
Fair Value | Level 2 | Floating rate debt
Liabilities
Debt	10,291	4,248
Fair Value | Level 3
Assets
Long-term other assets	14	149
Total	14	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