Fair Value Measurements, Derivative Instruments and Hedging Activities and Financial Risks - Derivatives Qualifying and Designated as Hedging Instruments Recognized in Other Comprehensive Income (Details) - USD ($)	3 Months Ended
	Feb. 28, 2018	Feb. 28, 2017	Nov. 30, 2017
Derivative Instruments, Gain (Loss) [Line Items]
Derivative assets	$ 17,000,000		$ 15,000,000
Derivative liabilities	130,000,000		161,000,000
Minimum
Derivative Instruments, Gain (Loss) [Line Items]
Derivative asset, cash collateral netting threshold, fair value	100,000,000
Interest rate swaps – cash flow hedges | Cash flow hedging
Derivative Instruments, Gain (Loss) [Line Items]
Interest rate swaps designated as cash flow hedges	485,000,000		479,000,000
Fuel
Derivative Instruments, Gain (Loss) [Line Items]
Collateral required to be posted	0		0
Collateral required to be received	0		0
Designated as hedging instruments
Derivative Instruments, Gain (Loss) [Line Items]
Derivative assets	17,000,000		15,000,000
Derivative liabilities	63,000,000		57,000,000
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	(6,000,000)	$ 1,000,000
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	1,000,000	8,000,000
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	4,000,000	$ 2,000,000
Designated as hedging instruments | Currency swap
Derivative Instruments, Gain (Loss) [Line Items]
Derivative liabilities	337,000,000		324,000,000
Not designated as hedging instrument
Derivative Instruments, Gain (Loss) [Line Items]
Derivative liabilities	67,000,000		104,000,000
Prepaid expenses and other | Designated as hedging instruments | Net investment hedges
Derivative Instruments, Gain (Loss) [Line Items]
Derivative assets	4,000,000		3,000,000
Prepaid expenses and other | Designated as hedging instruments | Foreign currency zero cost collars – cash flow hedges
Derivative Instruments, Gain (Loss) [Line Items]
Derivative assets	13,000,000		12,000,000
Accrued liabilities and other | Designated as hedging instruments | Net investment hedges
Derivative Instruments, Gain (Loss) [Line Items]
Derivative liabilities	17,000,000		13,000,000
Accrued liabilities and other | Designated as hedging instruments | Interest rate swaps – cash flow hedges
Derivative Instruments, Gain (Loss) [Line Items]
Derivative liabilities	10,000,000		10,000,000
Accrued liabilities and other | Not designated as hedging instrument | Fuel
Derivative Instruments, Gain (Loss) [Line Items]
Derivative liabilities	67,000,000		95,000,000
Other long-term liabilities | Designated as hedging instruments | Net investment hedges
Derivative Instruments, Gain (Loss) [Line Items]
Derivative liabilities	21,000,000		17,000,000
Other long-term liabilities | Designated as hedging instruments | Interest rate swaps – cash flow hedges
Derivative Instruments, Gain (Loss) [Line Items]
Derivative liabilities	$ 14,000,000		17,000,000
Other long-term liabilities | Not designated as hedging instrument | Fuel
Derivative Instruments, Gain (Loss) [Line Items]
Derivative liabilities			$ 9,000,000