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Employee Benefit Plans (Tables) | 3 Months Ended
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Mar. 31, 2024
Retirement Benefits [Abstract] |
Schedule of Components of Net Periodic Benefit Cost | The Company's net periodic benefit cost includes the following components for the three months ended March 31 (in millions):
|  | Pension Benefits |  | Other Postretirement Benefits |  | Affected Line Item in the Statements of Consolidated Operations
|  | 2024 |  | 2023 |  | 2024 |  | 2023 |  |
Service cost |  | $ | 34 |  |  | $ | 31 |  |  | $ | 1 |  |  | $ | 1 |  |  | Salaries and related costs
Interest cost |  | 57 |  |  | 55 |  |  | 10 |  |  | 10 |  |  | Miscellaneous, net
Expected return on plan assets |  | (69) |  |  | (63) |  |  | — |  |  | — |  |  | Miscellaneous, net
Amortization of unrecognized (gain) loss |  | 5 |  |  | 2 |  |  | (7) |  |  | (9) |  |  | Miscellaneous, net
Amortization of prior service credit |  | — |  |  | — |  |  | (23) |  |  | (28) |  |  | Miscellaneous, net
Total |  | $ | 27 |  |  | $ | 25 |  |  | $ | (19) |  |  | $ | (26) |  |  |

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- Definition Tabular disclosure of the components of net benefit costs for pension plans and/or other employee benefit plans including service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) recognized due to settlements or curtailments. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 715 -SubTopic 20 -Subparagraph (h) -Name Accounting Standards Codification -Paragraph 1 -Section 50 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480506/715-20-50-1 + Details
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