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Pension and Postretirement Benefit Plans - US Pension Weighted Averages and Expected Returns Information (Details) | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Postretirement Benefits |  |  |
Weighted-average assumptions used to determine benefit obligations |  |  |
Discount rate | 5.06% | 5.25% | 2.88%
Weighted-average assumptions used to determine net cost for years ended |  |  |
Discount rate - service cost | 5.39% | 3.11% | 3.21%
Discount rate - interest cost | 5.25% | 2.59% | 2.20%
Expected return on assets | 7.58% | 5.77% | 6.15%
United States | U.S. Pension Plans |  |  |
Weighted-average assumptions used to determine benefit obligations |  |  |
Discount rate | 4.98% | 5.18% | 2.89%
Compensation rate increase | 3.77% | 3.37% | 3.21%
Weighted-average assumptions used to determine net cost for years ended |  |  |
Discount rate - service cost | 5.26% | 3.10% | 2.81%
Discount rate - interest cost | 5.11% | 2.38% | 1.92%
Expected return on assets | 7.50% | 6.00% | 6.50%
Compensation rate increase | 3.37% | 3.21% | 3.21%
International | U.S. Pension Plans |  |  |
Weighted-average assumptions used to determine benefit obligations |  |  |
Discount rate | 3.99% | 4.39% | 1.80%
Compensation rate increase | 2.88% | 2.86% | 2.86%
Weighted-average assumptions used to determine net cost for years ended |  |  |
Discount rate - service cost | 4.06% | 1.64% | 1.23%
Discount rate - interest cost | 4.39% | 1.62% | 1.13%
Expected return on assets | 4.61% | 3.86% | 4.36%
Compensation rate increase | 2.86% | 2.86% | 2.88%

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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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- Definition Weighted average rate of return on plan assets, reflecting average rate of earnings expected on existing plan assets and expected contributions, used to determine net periodic benefit cost 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 8 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480506/715-20-50-8 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (k)(3) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480506/715-20-50-1 + Details
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