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Accumulated Other Comprehensive Income (Loss) (Tables) | 6 Months Ended
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Jun. 30, 2023
Equity [Abstract] |
Schedule of 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 March 31, 2023 |  | $ | 582 |  |  | $ | (8) |  |  | $ | (413) |  |  | $ | 161 |
Changes in value |  | (8) |  |  | (31) |  |  | 8 |  |  | (31) |
Amounts reclassified to earnings |  | (35) |  | (b) | — |  |  | 8 |  |  | (27) |
Balance at June 30, 2023 |  | $ | 539 |  |  | $ | (39) |  |  | $ | (397) |  |  | $ | 103 |
Balance at December 31, 2022 |  | $ | 626 |  |  | $ | (35) |  |  | $ | (416) |  |  | $ | 175 |
Changes in value |  | (17) |  |  | (4) |  |  | 4 |  |  | (17) |
Amounts reclassified to earnings |  | (70) |  | (b) | — |  |  | 15 |  |  | (55) |
Balance at June 30, 2023 |  | $ | 539 |  |  | $ | (39) |  |  | $ | (397) |  |  | $ | 103 |
Balance at March 31, 2022 |  | $ | (839) |  |  | $ | — |  |  | $ | (98) |  |  | $ | (937) |
Changes in value |  | 6 |  |  | (14) |  |  | 2 |  |  | (6) |
Amounts reclassified to earnings |  | (1) |  | (b) | — |  |  | — |  |  | (1) |
Balance at June 30, 2022 |  | $ | (834) |  |  | $ | (14) |  |  | $ | (96) |  |  | $ | (944) |
Balance at December 31, 2021 |  | $ | (847) |  |  | $ | — |  |  | $ | (95) |  |  | $ | (942) |
Changes in value |  | 14 |  |  | (14) |  |  | (1) |  |  | (1) |
Amounts reclassified to earnings |  | (1) |  | (b) | — |  |  | — |  |  | (1) |
Balance at June 30, 2022 |  | $ | (834) |  |  | $ | (14) |  |  | $ | (96) |  |  | $ | (944) |
(a) Includes approximately $285 million of deferred income tax expense that will not be recognized in net income until the related pension and postretirement benefit 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, specifically the following components: amortization of unrecognized (gain) loss, amortization of prior service credit and other (see Note 5 of this report for additional information).

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