Fair Value Measurements, Derivative Instruments and Hedging Activities and Financial Risks - Offsetting Derivative Instruments (Details) - USD ($) $ in Millions	Aug. 31, 2018	Nov. 30, 2017
Assets
Gross Amounts	$ 5	$ 15
Gross Amounts Offset in the Balance Sheet	0	0
Total Net Amounts Presented in the Balance Sheet	5	15
Gross Amounts not Offset in the Balance Sheet	(5)	(8)
Net Amounts	0	7
Liabilities
Gross Amounts	40	161
Gross Amounts Offset in the Balance Sheet	0	0
Total Net Amounts Presented in the Balance Sheet	40	161
Gross Amounts not Offset in the Balance Sheet	(5)	(8)
Net Amounts	$ 36	$ 153

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