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Fair Value Measurements, Derivative Instruments and Hedging Activities and Financial Risk - Fuel Derivatives Outstanding (Details) bbl in Thousands, $ in Millions | 12 Months Ended
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Nov. 30, 2017 USD ($) bbl $ / bbl | Nov. 30, 2016 USD ($) | Nov. 30, 2015 USD ($)
Derivative [Line Items] |  |  |
Unrealized gains (losses) on fuel derivatives, net | $ | $ 227 | $ 236 | $ (332)
Realized losses on fuel derivatives, net | $ | (192) | (283) | (244)
Gains (losses) on fuel derivatives, net | $ | $ 35 | $ (47) | $ (576)
Fuel Derivatives 2018 Maturity [Domain] |  |  |
Derivative [Line Items] |  |  |
Barrels (in bbls) | bbl | 5,700 |  |
Fuel Derivatives 2018 Maturity January 2014 Transaction Date |  |  |
Derivative [Line Items] |  |  |
Barrels (in bbls) | bbl | 2,700 |  |
Weighted-Average Floor Price (in dollars per BBL) | 75 |  |
Weighted-Average Ceiling Price (in dollars per BBL) | 110 |  |
Fuel Derivatives 2018 Maturity October 2014 Transaction Date |  |  |
Derivative [Line Items] |  |  |
Barrels (in bbls) | bbl | 3,000 |  |
Weighted-Average Floor Price (in dollars per BBL) | 80 |  |
Weighted-Average Ceiling Price (in dollars per BBL) | 114 |  |

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- Definition Aggregate notional amount of derivative expressed in nonmonetary units. For example, the number of barrels specified in a fuel oil forward purchase contract. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B + Details
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- Definition The cap rate on a price risk derivative such as a cap or collar. A payment or receipt is triggered if the market rate exceeds the cap rate on the contract. + References No definition available. + Details
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- Definition Amount of realized and unrealized gain (loss) of derivative instruments not designated or qualifying as hedging instruments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5624171-113959 + Details
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- Definition The difference between the book value and the sale price of options, swaps, futures, forward contracts, and other derivative instruments. This element refers to the gain (loss) included in earnings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.13(h)) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585 + Details
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- Definition The net change in the difference between the fair value and the carrying value, or in the comparative fair values, of derivative instruments, including options, swaps, futures, and forward contracts, held at each balance sheet date, that was included in earnings for the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585 + Details
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