Fair Value Measurements, Derivative Instruments and Hedging Activities - Derivatives Qualifying and Designated as Hedging Instruments Recognized in Other Comprehensive Income (Details) - USD ($)	3 Months Ended
	Feb. 28, 2017	Feb. 29, 2016	Nov. 30, 2016
Fuel
Derivative Instruments, Gain (Loss) [Line Items]
Collateral required to be posted	$ 0		$ 0
Collateral required to be received	0		$ 0
Minimum
Derivative Instruments, Gain (Loss) [Line Items]
Derivative asset, cash collateral netting threshold, fair value	100,000,000
Designated as hedging instruments | Net investment hedges
Derivative Instruments, Gain (Loss) [Line Items]
Effective portions of derivatives qualifying and designated as hedging instruments recognized in other comprehensive income	1,000,000	$ (13,000,000)
Designated as hedging instruments | Foreign currency zero cost collars – cash flow hedges
Derivative Instruments, Gain (Loss) [Line Items]
Effective portions of derivatives qualifying and designated as hedging instruments recognized in other comprehensive income	8,000,000	10,000,000
Designated as hedging instruments | Interest rate swaps – cash flow hedges
Derivative Instruments, Gain (Loss) [Line Items]
Effective portions of derivatives qualifying and designated as hedging instruments recognized in other comprehensive income	$ 2,000,000	$ (3,000,000)