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Accumulated Other Comprehensive Income (Loss) (Tables) | 3 Months Ended
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Mar. 31, 2022
Equity [Abstract] |
Components of Accumulated Other Comprehensive Income, Net of Tax | The table below presents the components of the Company's accumulated other comprehensive income (loss), net of tax ("AOCI") (in millions):
|  | Pension and Other Postretirement Liabilities |  | Investments and Other |  | Deferred Taxes (a) |  | Total
Balance at December 31, 2021 |  | $ | (847) |  |  | $ | — |  |  | $ | (95) |  |  | $ | (942) |
Changes in value |  | 8 |  |  | — |  |  | (3) |  |  | 5 |
Amounts reclassified to earnings |  | — |  |  | — |  |  | — |  |  | — |
Balance at March 31, 2022 |  | $ | (839) |  |  | $ | — |  |  | $ | (98) |  |  | $ | (937) |
Balance at December 31, 2020 |  | $ | (1,102) |  |  | $ | 2 |  |  | $ | (39) |  |  | $ | (1,139) |
Changes in value |  | 13 |  |  | (1) |  |  | (3) |  |  | 9 |
Amounts reclassified to earnings |  | 5 |  | (b) | — |  |  | (1) |  |  | 4 |
Balance at March 31, 2021 |  | $ | (1,084) |  |  | $ | 1 |  |  | $ | (43) |  |  | $ | (1,126) |
(a) Relates primarily to pension and other postretirement benefit liabilities and includes approximately $285 million of deferred income tax expense that will not be recognized in net income until these obligations are fully extinguished. We consider all income sources, including other comprehensive income, in determining the amount of tax benefit allocated to results from operations. (b) This AOCI component is included in the computation of net periodic pension and other postretirement costs (see Note 5 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/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 30 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6450520&loc=d3e32583-110901 Reference 2: 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=124509347&loc=SL7669686-108580 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 30 -Section 45 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=118261656&loc=d3e32211-110900 + Details
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