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Other Comprehensive Income (Loss) (Tables) | 12 Months Ended
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Dec. 31, 2023
Equity [Abstract] |
Schedule of Changes in the AOCI Balance by Component | Changes in the AOCI balance by component are shown in the following table. Amounts reclassified in pension and other post-employment benefits to net earnings relate to the amortization of actuarial losses and are included in other income - net on the consolidated income statements. See Note 9, Employee Benefit Plans, for further information. Interest rate derivatives consist of forward starting interest rate swaps classified as cash flow hedges. See Note 10, Debt and Credit Agreements, for further information. Items classified as other primarily represent CSX's share of AOCI of equity method investees. Amounts reclassified in other to net earnings are included in purchased services and other or equipment and other rents on the consolidated income statements.
| Pension and Other Post-Employment Benefits | Interest Rate Derivatives | Other | Accumulated Other Comprehensive (Loss) Income
(Dollars in Millions) |  |  |  |
Balance December 31, 2020 - Net of Tax | $ | (598) |  | $ | 62 |  | $ | (62) |  | $ | (598) |
Other Comprehensive Income (Loss) |  |  |  |
Income Before Reclassifications | 147 |  | 11 |  | — |  | 158 |
Amounts Reclassified to Net Earnings | 66 |  | — |  | 15 |  | 81 |
Tax Expense | (46) |  | (3) |  | — |  | (49) |
Total Other Comprehensive Income | $ | 167 |  | $ | 8 |  | $ | 15 |  | $ | 190 |
Balance December 31, 2021 - Net of Tax | $ | (431) |  | $ | 70 |  | $ | (47) |  | $ | (408) |
Other Comprehensive Income (Loss) |  |  |  |
(Loss) Income Before Reclassifications | (129) |  | 88 |  | — |  | (41) |
Amounts Reclassified to Net Earnings | 44 |  | — |  | 2 |  | 46 |
Tax Benefit (Expense) | 19 |  | (8) |  | 4 |  | 15 |
Total Other Comprehensive (Loss) Income | $ | (66) |  | $ | 80 |  | $ | 6 |  | $ | 20 |
Balance December 31, 2022 - Net of Tax | $ | (497) |  | $ | 150 |  | $ | (41) |  | $ | (388) |
Other Comprehensive Income (Loss) |  |  |  |
Income Before Reclassifications | 75 |  | 16 |  | — |  | 91 |
Amounts Reclassified to Net Earnings | 18 |  | — |  | 5 |  | 23 |
Tax Expense | (19) |  | (16) |  | (3) |  | (38) |
Total Other Comprehensive Income | $ | 74 |  | $ | — |  | $ | 2 |  | $ | 76 |
Balance December 31, 2023 - Net of Tax | $ | (423) |  | $ | 150 |  | $ | (39) |  | $ | (312) |

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