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, 2018	Nov. 30, 2017
Carrying Value
Assets
Long-term other assets	$ 117	$ 126
Total	117	126
Liabilities
Total	9,610	9,246
Carrying Value | Fixed Rate
Liabilities
Debt	5,168	5,588
Carrying Value | Floating Rate
Liabilities
Debt	4,442	3,658
Fair Value | Level 1
Assets
Long-term other assets	0	0
Total	0	0
Liabilities
Total	0	0
Fair Value | Level 1 | Fixed Rate
Liabilities
Debt	0	0
Fair Value | Level 1 | Floating Rate
Liabilities
Debt	0	0
Fair Value | Level 2
Assets
Long-term other assets	43	49
Total	43	49
Liabilities
Total	9,906	9,589
Fair Value | Level 2 | Fixed Rate
Liabilities
Debt	5,418	5,892
Fair Value | Level 2 | Floating Rate
Liabilities
Debt	4,488	3,697
Fair Value | Level 3
Assets
Long-term other assets	71	75
Total	71	75
Liabilities
Total	0	0
Fair Value | Level 3 | Fixed Rate
Liabilities
Debt	0	0
Fair Value | Level 3 | Floating Rate
Liabilities
Debt	$ 0	$ 0