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Estimated Fair Value and Basis of Valuation of Financial Instrument Assets And (Liabilities) Measured at Fair Value on Recurring Basis (Parenthetical) (Detail) (USD $) In Millions, unless otherwise specified |  |  |  |  |  |  |  |  |  |  |  |  | 3 Months Ended |  |  | 3 Months Ended
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Feb. 29, 2012 Net investment hedges Financial Instruments Measured at Fair Value on a Recurring Basis | Nov. 30, 2011 Net investment hedges Financial Instruments Measured at Fair Value on a Recurring Basis | Feb. 29, 2012 Net investment hedges Financial Instruments Measured at Fair Value on a Recurring Basis Maximum | Feb. 29, 2012 Fuel Derivatives Second Half 2012 Financial Instruments Measured at Fair Value on a Recurring Basis | Nov. 30, 2011 Fuel Derivatives Second Half 2012 Financial Instruments Measured at Fair Value on a Recurring Basis | Feb. 29, 2012 Fuel Derivatives 2013 Maturity | Feb. 29, 2012 Fuel Derivatives 2013 Maturity Financial Instruments Measured at Fair Value on a Recurring Basis | Nov. 30, 2011 Fuel Derivatives 2013 Maturity Financial Instruments Measured at Fair Value on a Recurring Basis | Feb. 29, 2012 Fuel Derivatives 2014 Maturity | Feb. 29, 2012 Fuel Derivatives 2014 Maturity Financial Instruments Measured at Fair Value on a Recurring Basis | Nov. 30, 2011 Fuel Derivatives 2014 Maturity Financial Instruments Measured at Fair Value on a Recurring Basis | Feb. 29, 2012 Fuel Derivatives 2015 Maturity | Feb. 29, 2012 Fuel Derivatives 2015 Maturity Financial Instruments Measured at Fair Value on a Recurring Basis | Nov. 30, 2011 Fuel Derivatives 2015 Maturity Financial Instruments Measured at Fair Value on a Recurring Basis | Feb. 29, 2012 Fair Value Hedging Interest rate swaps Financial Instruments Measured at Fair Value on a Recurring Basis | Nov. 30, 2011 Fair Value Hedging Interest rate swaps Financial Instruments Measured at Fair Value on a Recurring Basis | Feb. 29, 2012 Fair Value Hedging Interest rate swaps Financial Instruments Measured at Fair Value on a Recurring Basis Maximum | Feb. 29, 2012 Cash Flow Hedging Interest rate swaps Financial Instruments Measured at Fair Value on a Recurring Basis | Nov. 30, 2011 Cash Flow Hedging Interest rate swaps Financial Instruments Measured at Fair Value on a Recurring Basis | Feb. 29, 2012 Cash Flow Hedging Interest rate swaps Financial Instruments Measured at Fair Value on a Recurring Basis Maximum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Estimated percent of fuel consumption |  |  |  | 20.00% | 10.00% | 20.00% | [1] | 20.00% | 10.00% | 20.00% | [1] | 20.00% | 10.00% | 20.00% | [1] | 20.00% | 10.00% |  |  |  |  |  |
Total foreign currency forwards designated as hedges of net investments in foreign operations for euro-denominated functional currency | $ 433 | $ 183 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maturity of foreign currency derivatives |  |  | July 2017 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount of interest rate swap agreements change, of fixed rate debt to U.S. dollar LIBOR or GBP LIBOR-based floating rate debt, for both U.S. dollar and sterling interest rate swaps designated as fair value hedges |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 316 | 510 |  |  |  |
Maturity of interest rate swaps |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2012-06 |  |  | 2022-02
Amount of interest rate swap agreements change, of EURIBOR-based floating rate debt to fixed rate debt, for euro interest rate swaps designated as cash flow hedges |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 322 | $ 320 |
[1] | Fuel derivatives mature evenly over each quarter within the above fiscal years.

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- Definition The percentage of expected requirements covered by the aggregate notional amount of derivative contracts expressed in nonmonetary units. For example, the number of barrels specified in a fuel oil forward purchase contract as a percentage of expected need. + References No definition available. + Details
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- Definition Fair value as of the balance sheet date of all interest rate derivative assets designated as cash flow hedging instruments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 17 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=6935481&loc=SL5624163-113959 + Details
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- Definition Fair value as of the balance sheet date of all derivative assets designated as interest rate fair value hedging instruments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 17 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=6935481&loc=SL5624163-113959 + Details
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- Definition Fair value of all derivative assets designated as hedges of net investment in foreign operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=6935481&loc=SL5624163-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 44C -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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