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Pension and Postretirement Benefit Plans (Tables) | 3 Months Ended
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Mar. 31, 2024
Retirement Benefits [Abstract] |
Schedule of Net Periodic Benefit Cost (Benefit) | The other components of net periodic benefit cost are reflected in other expense (income), net. Components of net periodic benefit cost and other supplemental information for the three months ended March 31, 2024 and 2023 follow:
|  | Three months ended March 31,
|  | Qualified and Non-qualified Pension Benefits |  | Postretirement Benefits
|  | United States | International |
(Millions) |  | 2024 |  | 2023 |  | 2024 |  | 2023 |  | 2024 |  | 2023
Net periodic benefit cost (benefit) |  |  |  |  |  |  |  |  |  |  |  |
Operating expense |  |  |  |  |  |  |  |  |  |  |  |
Service cost |  | $ | 37 |  |  | $ | 43 |  |  | $ | 21 |  |  | $ | 19 |  |  | $ | 7 |  |  | $ | 6 |
Non-operating expense |  |  |  |  |  |  |  |  |  |  |  |
Interest cost |  | 160 |  |  | 166 |  |  | 54 |  |  | 55 |  |  | 22 |  |  | 22 |
Expected return on plan assets |  | (237) |  |  | (244) |  |  | (87) |  |  | (75) |  |  | (19) |  |  | (19) |
Amortization of transition asset |  | — |  |  | — |  |  | 1 |  |  | — |  |  | — |  |  | — |
Amortization of prior service benefit |  | (4) |  |  | (6) |  |  | 1 |  |  | 1 |  |  | (6) |  |  | (8) |
Amortization of net actuarial loss |  | 95 |  |  | 73 |  |  | 3 |  |  | 2 |  |  | 6 |  |  | 2 |
Total non-operating expense (benefit) |  | 14 |  |  | (11) |  |  | (28) |  |  | (17) |  |  | 3 |  |  | (3) |
Total net periodic benefit cost (benefit) |  | $ | 51 |  |  | $ | 32 |  |  | $ | (7) |  |  | $ | 2 |  |  | $ | 10 |  |  | $ | 3 |

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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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