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Pension and Other Postretirement Benefit Plans - Accumulated and Projected Benefit Obligation in Excess of Plan Assets (Details) - Pension Benefits - USD ($) $ in Millions | Dec. 31, 2024 | Dec. 31, 2023
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United States |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |
Pension plans with a projected benefit obligation in excess of plan assets, projected benefit obligation | $ 9,517 | $ 10,446
Pension plans with a projected benefit obligation in excess of plan assets, fair value of plan assets | 9,057 | 9,804
Pension plans with an accumulated benefit obligation in excess of plan assets, accumulated benefit obligation | 442 | 9,700
Pension plans with an accumulated benefit obligation in excess of plan assets, fair value of plan assets | 0 | 9,186
International |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |
Pension plans with a projected benefit obligation in excess of plan assets, projected benefit obligation | 1,847 | 2,961
Pension plans with a projected benefit obligation in excess of plan assets, fair value of plan assets | 1,435 | 2,462
Pension plans with an accumulated benefit obligation in excess of plan assets, accumulated benefit obligation | 1,768 | 1,791
Pension plans with an accumulated benefit obligation in excess of plan assets, fair value of plan assets | $ 1,385 | $ 1,336

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- Definition Amount of plan asset for defined benefit pension plan with projected benefit obligation in excess of plan assets. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 17 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480482/715-20-55-17 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-3 + Details
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- Definition Amount of accumulated benefit obligation for defined benefit plan with accumulated benefit obligation in excess of plan assets. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 17 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480482/715-20-55-17 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-3 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-3 + Details
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