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Accumulated Other Comprehensive Income (Loss) (Tables) | 12 Months Ended
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Dec. 31, 2019
Equity [Abstract] |
Components of AOCI | The tables below present the components of the Company's AOCI, net of tax (in millions):
|  | Pension and Other Postretirement Liabilities |  | Investments and Other |  | Deferred Taxes |  | Total
Balance at December 31, 2016 |  | $ | (854 | ) |  | $ | (1 | ) |  | $ | 26 |  |  | $ | (829 | )
Change in value |  | (306 | ) | (a) | (7 | ) |  | 74 |  |  | (239 | )
Amounts reclassified to earnings |  | 58 |  |  | 2 |  |  | (21 | ) |  | 39 |
Reclassification of stranded tax effects |  | — |  |  | — |  |  | (118 | ) | (b) | (118 | )
Balance at December 31, 2017 |  | (1,102 | ) |  | (6 | ) |  | (39 | ) |  | (1,147 | )
Change in value |  | 377 |  | (a) | (5 | ) |  | (83 | ) |  | 289 |
Amounts reclassified to earnings |  | 62 |  |  | — |  |  | (13 | ) |  | 49 |
Amounts reclassified to retained earnings ("RE") |  | — |  |  | 7 |  | (c) | (1 | ) | (c) | 6 |
Balance at December 31, 2018 |  | (663 | ) |  | (4 | ) |  | (136 | ) |  | (803 | )
Change in value |  | 105 |  | (a) | 7 |  |  | (24 | ) |  | 88 |
Amounts reclassified to earnings |  | (2 | ) |  | (1 | ) |  | — |  |  | (3 | )
Balance at December 31, 2019 |  | $ | (560 | ) |  | $ | 2 |  |  | $ | (160 | ) |  | $ | (718 | )
(a) This AOCI component is included in the computation of net periodic pension and other postretirement costs. See Note 7 of this report for additional information on pensions and other postretirement liabilities. (b) This amount represents the reclassification from AOCI to RE of the stranded tax effects resulting from the enactment of the Tax Cuts and Jobs Act (the "Tax Act"). (c) These amounts represent the reclassification from AOCI to RE of the unrealized loss, and related tax, on the Company's investment in Azul Linhas Aéreas Brasileiras S.A. ("Azul") which was classified as an available-for-sale security prior to the Company adopting Accounting Standards Update No. 2016-01, Financial Instruments—Overall (Subtopic 825-10) effective January 1, 2018.

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- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=118930883&loc=SL7669686-108580 + Details
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