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Accumulated Other Comprehensive Income (Loss) (Tables) | 12 Months Ended
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Dec. 31, 2014
Equity [Abstract] |
Rollforward of the Amounts Included in AOCI, Net of Taxes | A rollforward of the amounts included in AOCI, net of taxes, is shown below for 2014 and 2013:
(in millions) | Fuel derivatives |  | Interest rate derivatives |  | Defined benefit plan items |  | Other |  | Deferred tax impact |  | Accumulated other comprehensive income (loss)
Balance at December 31, 2012 | $ | (103 | ) |  | $ | (108 | ) |  | $ | 26 |  |  | $ | (8 | ) |  | $ | 74 |  |  | $ | (119 | )
changes in fair value | (82 | ) |  | 22 |  |  | 39 |  |  | 16 |  |  | — |  |  | (5 | )
Reclassification to earnings | 165 |  |  | 28 |  |  | — |  |  | — |  |  | (72) |  |  | 121 |
Balance at December 31, 2013 | $ | (20 | ) |  | $ | (58 | ) |  | $ | 65 |  |  | $ | 8 |  |  | $ | 2 |  |  | $ | (3 | )
changes in fair value | (1,191 | ) |  | (10 | ) |  | (24 | ) |  | — |  |  | 454 |  |  | (771 | )
Reclassification to earnings | 34 |  |  | 23 |  |  | — |  |  | — |  |  | (21) |  |  | 36 |
Balance at December 31, 2014 | $ | (1,177 | ) |  | $ | (45 | ) |  | $ | 41 |  |  | $ | 8 |  |  | $ | 435 |  |  | $ | (738 | )
Reclassification out of Accumulated Other Comprehensive Income | The following table illustrates the significant amounts reclassified out of each component of AOCI for the year ended December 31, 2014:
Year ended December 31, 2014
(in millions) |  | Amounts reclassified from AOCI |  | Affected line item in the Consolidated Statement of Comprehensive Income
AOCI components |  |
Unrealized gain on fuel derivative instruments |  | $ | 34 |  |  | Fuel and oil expense
|  | 12 |  |  | Less: Tax expense
|  | $ | 22 |  |  | Net of tax
Unrealized gain on interest rate derivative instruments |  | $ | 23 |  |  | Interest expense
|  | 9 |  |  | Less: Tax expense
|  | $ | 14 |  |  | Net of tax
Total reclassifications for the period |  | $ | 36 |  |  | Net of tax

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- Definition Tabular disclosure of information about items reclassified out of accumulated other comprehensive income (loss). + References No definition available. + Details
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- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=36458714&loc=SL7669686-108580 + Details
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