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Accumulated Other Comprehensive Income (Loss) (Tables) | 12 Months Ended
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Dec. 31, 2017
Components of Accumulated Other Comprehensive Income, Net of Tax | The tables below present the components of the Company’s AOCI, net of tax (in millions):
|  | Pension and Other Postretirement Liabilities |  |  | Fuel Derivatives Contracts |  |  | Investments and Other |  |  | Deferred Taxes |  |  | Total |
Balance at December 31, 2014 |  | $ | (472) |  |  | $ | (499) |  |  | $ | 8 |  |  | $ | (116) |  |  | $ | (1,079) |
Other comprehensive income (loss) before reclassifications |  |  | 78 | (a) |  |  | (320) |  |  |  | (5) |  |  |  | 88 |  |  |  | (159) |
Amounts reclassified from accumulated other comprehensive income |  |  | 31 |  |  |  | 604 |  |  |  | — |  |  |  | (228) |  |  |  | 407 |
Net other comprehensive income (loss) |  |  | 109 |  |  |  | 284 |  |  |  | (5) |  |  |  | (140) |  |  |  | 248 |
Balance at December 31, 2015 |  | $ | (363) |  |  | $ | (215) |  |  | $ | 3 |  |  | $ | (256) |  |  | $ | (831) |
Other comprehensive income (loss) before reclassifications |  |  | (517) | (a) |  |  | (4) |  |  |  | — |  |  |  | 187 |  |  |  | (334) |
Amounts reclassified from accumulated other comprehensive income |  |  | 26 |  |  |  | 217 |  |  |  | (2) |  |  |  | 95 |  |  |  | 336 |
Net other comprehensive income (loss) |  |  | (491) |  |  |  | 213 |  |  |  | (2) |  |  |  | 282 |  |  |  | 2 |
Balance at December 31, 2016 |  | $ | (854) |  |  | $ | (2) |  |  | $ | 1 |  |  | $ | 26 |  |  | $ | (829) |
Other comprehensive income (loss) before reclassifications |  |  | (306) | (a) |  |  | — |  |  |  | (7) |  |  |  | 74 |  |  |  | (239) |
Amounts reclassified from accumulated other comprehensive income |  |  | 58 |  |  |  | 2 |  |  |  | — |  |  |  | (21) |  |  |  | 39 |
Reclassification of stranded tax effects |  |  | — |  |  |  | — |  |  |  | — |  |  |  | (118) | (b) |  |  | (118) |
Net other comprehensive income (loss) |  |  | (248) |  |  |  | 2 |  |  |  | (7) |  |  |  | (65) |  |  |  | (318) |
Balance at December 31, 2017 |  | $ | (1,102) |  |  | $ | — |  |  | $ | (6) |  |  | $ | (39) | (c) |  | $ | (1,147) |
Details about AOCI Components |  | Amount Reclassified from AOCI to Income |  |  | Affected Line Item in the Statement Where Net Income is Presented |
|  | Year Ended December 31, |  |  |  |
|  | 2017 |  |  | 2016 |  |  | 2015 |  |  |  |
Fuel derivative contracts |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fuel contracts-reclassifications of losses into earnings (d) |  | $ | 2 |  |  | $ | 217 |  |  | $ | 604 |  |  |  | Aircraft fuel |
Pension and Postretirement liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amortization of unrecognized (gains) losses and prior service cost (e) |  |  | 58 |  |  |  | 26 |  |  |  | 31 |  |  |  | Salaries and related costs |
Investments and other |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Available-for-sale securities—reclassifications of gains into earnings |  |  | — |  |  |  | (2 | ) |  |  | — |  |  |  | Miscellaneous, net |
(a) Prior service credits increased by $0 million, $30 million and $0 million and actuarial losses increased by approximately $306 million, $560 million and $78 million for 2017, 2016 and 2015, respectively. (b) This amount represents the reclassification from AOCI to RE of the stranded tax effects resulting from the enactment of the Tax Act. (c) Deferred tax balance relates mainly to Pension and Other Postretirement Liabilities. (d) The last of the Company’s fuel hedge derivatives designated for cash flow hedge accounting expired in December 2016. The 2017 amount reclassified from AOCI into fuel expense represents hedge losses on December 2016 settled trades, but for which the associated fuel purchased in December 2016 was not consumed until January 2017. The Company’s current strategy is to not enter into transactions to hedge its fuel consumption, although the Company regularly reviews its strategy based on market conditions and other factors. (e) This AOCI component is included in the computation of net periodic pension and other postretirement costs (see Note 8 of this report for additional information).

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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=84228862&loc=SL7669686-108580 + Details
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