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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 | 9 Months Ended |
--- | --- | --- | ---
Aug. 31, 2018 | Aug. 31, 2017 | Aug. 31, 2018 | Aug. 31, 2017 | Nov. 30, 2017
Minimum |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Derivative asset, cash collateral netting threshold, fair value | $ 100,000,000 |  | $ 100,000,000 |  |
Fuel |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Collateral required to be posted | 0 |  | 0 |  | $ 0
Collateral required to be received | 0 |  | 0 |  | $ 0
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 | 3,000,000 | $ (17,000,000) | 13,000,000 | $ (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 | (1,000,000) | 17,000,000 | (11,000,000) | 52,000,000 |
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 | $ 1,000,000 | $ 1,000,000 | $ 5,000,000 | $ 5,000,000 |

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