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Other Comprehensive Income (Loss) | 12 Months Ended
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Dec. 31, 2023
Equity [Abstract] |
Other Comprehensive Income (Loss) | Other Comprehensive Income (Loss) CSX reports comprehensive earnings or loss in accordance with the Comprehensive Income Topic in the ASC in the consolidated comprehensive income statement. Total comprehensive earnings are defined as all changes in shareholders' equity during a period, other than those resulting from investments by and distributions to shareholders (e.g. issuance of equity securities and dividends). Generally, for CSX, total comprehensive earnings equal net earnings plus or minus adjustments for pension and other post-retirement liabilities as well as derivative activity and other adjustments. Total comprehensive earnings represent the activity for a period net of tax and were $3.8 billion, $4.2 billion and $4.0 billion for 2023, 2022 and 2021, respectively. While total comprehensive earnings is the activity in a period and is largely driven by net earnings in that period, AOCI represents the cumulative balance of other comprehensive income, net of tax, as of the balance sheet date. For CSX, AOCI is primarily the cumulative balance related to pension and other post-retirement benefit adjustments, interest rate derivatives and CSX's share of AOCI of equity method investees. NOTE 16. Other Comprehensive Income (Loss), continued 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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- Definition The entire disclosure for comprehensive income, which includes, but is not limited to, 1) the amount of income tax expense or benefit allocated to each component of other comprehensive income, including reclassification adjustments, 2) the reclassification adjustments for each classification of other comprehensive income and 3) the ending accumulated balances for each component of comprehensive income. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(19)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483586/944-220-S99-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(21)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483621/220-10-S99-2 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 942 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04(23)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483589/942-220-S99-1 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 220 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org//220/tableOfContent + Details
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