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Pension and Postretirement Benefit Plans - US Pension Weighted Averages and Expected Returns Information (Details) | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022 | Jun. 30, 2024 | Mar. 31, 2024
Postretirement Benefits |  |  |  |  |
Weighted-average assumptions used to determine benefit obligations |  |  |  |  |
Discount rate | 5.68% | 5.06% | 5.25% |  |
Weighted-average assumptions used to determine net cost for years ended |  |  |  |  |
Discount rate - service cost | 5.30% | 5.39% | 3.11% |  |
Discount rate - interest cost | 5.23% | 5.25% | 2.59% |  |
Expected return on assets | 7.85% | 7.58% | 5.77% |  |
United States | U.S. Pension Plans |  |  |  |  |
Weighted-average assumptions used to determine benefit obligations |  |  |  |  |
Discount rate | 5.64% | 4.98% | 5.18% | 5.43% | 5.22%
Compensation rate increase | 3.77% | 3.77% | 3.37% |  |
Weighted-average assumptions used to determine net cost for years ended |  |  |  |  |
Discount rate - service cost | 5.35% | 5.26% | 3.10% |  |
Discount rate - interest cost | 5.21% | 5.11% | 2.38% |  |
Expected return on assets | 7.63% | 7.50% | 6.00% |  |
Compensation rate increase | 3.77% | 3.37% | 3.21% |  |
United States | Postretirement Benefits |  |  |  |  |
Weighted-average assumptions used to determine benefit obligations |  |  |  |  |
Discount rate |  |  |  |  | 5.19%
International | U.S. Pension Plans |  |  |  |  |
Weighted-average assumptions used to determine benefit obligations |  |  |  |  |
Discount rate | 4.44% | 3.99% | 4.39% |  |
Compensation rate increase | 2.88% | 2.88% | 2.86% |  |
Weighted-average assumptions used to determine net cost for years ended |  |  |  |  |
Discount rate - service cost | 3.77% | 4.06% | 1.64% |  |
Discount rate - interest cost | 4.06% | 4.39% | 1.62% |  |
Expected return on assets | 5.31% | 4.61% | 3.86% |  |
Compensation rate increase | 2.89% | 2.86% | 2.86% |  |

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- Definition Weighted average rate for present value of future retirement benefits cash flows, used to determine benefit obligation of defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (k)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
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- Definition Weighted average rate increase of compensation, used to determine benefit obligation of defined benefit plan. Plan includes, but is not limited to, pay-related defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (k)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
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