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Pension and Other Postretirement Benefit Plans (Tables) | 3 Months Ended
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Mar. 31, 2024
Pension Plans |
Defined Benefit Plan Disclosure [Line Items] |
Net Benefit Costs | The Company has defined benefit pension plans covering eligible employees in the U.S. and in certain of its international subsidiaries. The net periodic benefit cost (credit) of such plans consisted of the following components:
| Three Months Ended March 31, |  |
| 2024 |  | 2023 |  |  |  |
($ in millions) | U.S. |  | International |  | U.S. |  | International |  |  |  |  |  |  |  |
Service cost | $ | 86 |  |  | $ | 61 |  |  | $ | 76 |  |  | $ | 49 |  |  |  |  |  |  |  |  |
Interest cost | 134 |  |  | 74 |  |  | 133 |  |  | 74 |  |  |  |  |  |  |  |  |
Expected return on plan assets | (207) |  |  | (139) |  |  | (187) |  |  | (128) |  |  |  |  |  |  |  |  |
Amortization of unrecognized prior service credit | — |  |  | (3) |  |  | — |  |  | (3) |  |  |  |  |  |  |  |  |
Net loss (gain) amortization | 10 |  |  | 1 |  |  | — |  |  | (1) |  |  |  |  |  |  |  |  |
Termination benefits | 3 |  |  | — |  |  | — |  |  | — |  |  |  |  |  |  |  |  |
Curtailments | — |  |  | — |  |  | 2 |  |  | — |  |  |  |  |  |  |  |  |
Settlements | — |  |  | — |  |  | 21 |  |  | — |  |  |  |  |  |  |  |  |
| $ | 26 |  |  | $ | (6) |  |  | $ | 45 |  |  | $ | (9) |  |  |  |  |  |  |  |  |
Other Postretirement Benefit Plans |
Defined Benefit Plan Disclosure [Line Items] |
Net Benefit Costs | The Company provides medical benefits, principally to its eligible U.S. retirees and similar benefits to their dependents, through its other postretirement benefit plans. The net credit of such plans consisted of the following components:
| Three Months Ended March 31, |  |
($ in millions) | 2024 |  | 2023 |  |  |  |
Service cost | $ | 8 |  |  | $ | 8 |  |  |  |  |
Interest cost | 14 |  |  | 16 |  |  |  |  |
Expected return on plan assets | (20) |  |  | (16) |  |  |  |  |
Amortization of unrecognized prior service credit | (11) |  |  | (12) |  |  |  |  |
Net gain amortization | (12) |  |  | (11) |  |  |  |  |
| $ | (21) |  |  | $ | (15) |  |  |  |  |

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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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