Fair Value Measurements, Derivative Instruments and Hedging Activities - Derivatives Qualifying and Designated as Hedging Instruments Recognized in Other Comprehensive Income (Details)	3 Months Ended		9 Months Ended
	Aug. 31, 2016 USD ($) counterparty	Aug. 31, 2015 USD ($)	Aug. 31, 2016 USD ($) counterparty	Aug. 31, 2015 USD ($)	Nov. 30, 2015 USD ($) counterparty
Derivative Instruments, Gain (Loss) [Line Items]
Fuel Derivative, Counterparty | counterparty	1		1		1
Fuel
Derivative Instruments, Gain (Loss) [Line Items]
Collateral posted	$ 3,000,000		$ 3,000,000		$ 25,000,000
Collateral required to be received	0		0		$ 0
Minimum
Derivative Instruments, Gain (Loss) [Line Items]
Derivative asset, cash collateral netting threshold, fair value	100,000,000		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	0	$ (13,000,000)	(17,000,000)	$ 33,000,000
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	2,000,000	9,000,000	21,000,000	(39,000,000)
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	$ 0	$ 5,000,000	$ 3,000,000	$ 8,000,000