XML 32 R29.htm IDEA: XBRL DOCUMENT
v2.4.0.6

Fuel Derivatives Outstanding (Detail) | Feb. 29, 2012 bbl
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Fuel Derivatives 2012 Third Quarter Maturity |  |
Derivative [Line Items] |  |
Barrels | 1,044,000 | [1]
Weighted-Average Floor Price | 92 | [1]
Weighted-Average Ceiling Price | 132 | [1]
Percent of Estimated Fuel Consumption | 21.00% | [1]
Fuel Derivatives 2012 Fourth Quarter Maturity |  |
Derivative [Line Items] |  |
Barrels | 1,044,000 | [1]
Weighted-Average Floor Price | 92 | [1]
Weighted-Average Ceiling Price | 132 | [1]
Percent of Estimated Fuel Consumption | 20.00% | [1]
Fuel Derivatives Second Half 2012 |  |
Derivative [Line Items] |  |
Barrels | 2,088,000 | [1]
Weighted-Average Floor Price | 92 | [1]
Weighted-Average Ceiling Price | 132 | [1]
Fuel Derivatives 2013 Maturity |  |
Derivative [Line Items] |  |
Barrels | 4,224,000 | [1]
Weighted-Average Floor Price | 86 | [1]
Weighted-Average Ceiling Price | 130 | [1]
Percent of Estimated Fuel Consumption | 20.00% | [1]
Fuel Derivatives 2014 Maturity |  |
Derivative [Line Items] |  |
Barrels | 4,224,000 | [1]
Weighted-Average Floor Price | 79 | [1]
Weighted-Average Ceiling Price | 127 | [1]
Percent of Estimated Fuel Consumption | 20.00% | [1]
Fuel Derivatives 2015 Maturity |  |
Derivative [Line Items] |  |
Barrels | 4,320,000 | [1]
Weighted-Average Floor Price | 75 | [1]
Weighted-Average Ceiling Price | 125 | [1]
Percent of Estimated Fuel Consumption | 20.00% | [1]
[1] | Fuel derivatives mature evenly over each quarter within the above fiscal years.

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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 + 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 Floor rate on a price risk derivative such as a floor or a collar. A payment or receipt is triggered if the market rate falls below the floor rate on the contract. + References No definition available. + Details
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- Details
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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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