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Postretirement Benefit Plans - Benefit Obligations and Plan Assets (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Change in plan assets |  |  |
Funded status at end of year | $ 107 | $ 53 |
U.S. | Defined Benefit |  |  |
Change in plan benefit obligation |  |  |
Benefit obligation at beginning of year: | 505 | 521 |
Service cost | 7 | 8 | $ 15
Interest cost | 25 | 28 | 29
Participant contributions | 0 | 0 |
Benefits paid | (36) | (13) |
Settlements | (2) | (40) |
Actuarial loss (gain) | (6) | 1 |
Effects of exchange rate changes | 0 | 0 |
Benefit obligation at end of year | 493 | 505 | 521
Change in plan assets |  |  |
Fair value of plan assets at beginning of year: | 418 | 421 |
Actual return on plan assets | 18 | 47 |
Participant contributions | 0 | 0 |
Benefits paid | (36) | (13) |
Settlements | (2) | (40) |
Effects of exchange rate changes | 0 | 0 |
Other | 0 | 0 |
Fair value of plan assets at end of year | 400 | 418 | 421
Funded status at end of year | (93) | (87) |
U.S. | Defined Benefit | Qualified Plan |  |  |
Change in plan assets |  |  |
Defined Benefit Plan, Plan Assets, Contributions by Employer | 0 | 0 |
U.S. | Defined Benefit | Nonqualified Plan |  |  |
Change in plan assets |  |  |
Defined Benefit Plan, Plan Assets, Contributions by Employer | 2 | 3 |
U.S. | Retiree Health Care |  |  |
Change in plan benefit obligation |  |  |
Benefit obligation at beginning of year: | 258 | 274 |
Service cost | 1 | 2 | 3
Interest cost | 13 | 15 | 11
Participant contributions | 13 | 14 |
Benefits paid | (39) | (41) |
Settlements | 0 | 0 |
Actuarial loss (gain) | (12) | (6) |
Effects of exchange rate changes | 0 | 0 |
Benefit obligation at end of year | 234 | 258 | 274
Change in plan assets |  |  |
Fair value of plan assets at beginning of year: | 264 | 280 |
Actual return on plan assets | 9 | 29 |
Participant contributions | 13 | 14 |
Benefits paid | (39) | (41) |
Settlements | 0 | 0 |
Effects of exchange rate changes | 0 | 0 |
Other | 0 | (19) |
Fair value of plan assets at end of year | 248 | 264 | 280
Funded status at end of year | 14 | 6 |
U.S. | Retiree Health Care | Qualified Plan |  |  |
Change in plan assets |  |  |
Defined Benefit Plan, Plan Assets, Contributions by Employer | 1 | 1 |
U.S. | Retiree Health Care | Nonqualified Plan |  |  |
Change in plan assets |  |  |
Defined Benefit Plan, Plan Assets, Contributions by Employer | 0 | 0 |
Non-U.S. | Defined Benefit |  |  |
Change in plan benefit obligation |  |  |
Benefit obligation at beginning of year: | 1,732 | 1,667 |
Service cost | 16 | 16 | 25
Interest cost | 55 | 57 | 33
Participant contributions | 1 | 1 |
Benefits paid | (83) | (77) |
Settlements | (6) | (6) |
Actuarial loss (gain) | (106) | 80 |
Effects of exchange rate changes | (87) | (6) |
Benefit obligation at end of year | 1,522 | 1,732 | 1,667
Change in plan assets |  |  |
Fair value of plan assets at beginning of year: | 1,866 | 1,822 |
Actual return on plan assets | 27 | 137 |
Participant contributions | 1 | 1 |
Benefits paid | (83) | (77) |
Settlements | (6) | (6) |
Effects of exchange rate changes | (99) | (13) |
Other | 0 | 0 |
Fair value of plan assets at end of year | 1,708 | 1,866 | $ 1,822
Funded status at end of year | 186 | 134 |
Non-U.S. | Defined Benefit | Qualified Plan |  |  |
Change in plan assets |  |  |
Defined Benefit Plan, Plan Assets, Contributions by Employer | 2 | 2 |
Non-U.S. | Defined Benefit | Nonqualified Plan |  |  |
Change in plan assets |  |  |
Defined Benefit Plan, Plan Assets, Contributions by Employer | $ 0 | $ 0 |

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- Definition Amount of asset segregated and restricted to provide benefit under defined benefit plan. Asset includes, but is not limited to, stock, bond, other investment, earning from investment, and contribution by employer and employee. + 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 1 -Subparagraph (d)(iv)(02) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d)(ii) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d)(iv)(01) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 Reference 6: http://www.xbrl.org/2003/role/exampleRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d)(ii) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 Reference 7: http://www.xbrl.org/2003/role/exampleRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d)(iv)(01) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
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- Definition Amount of funded (unfunded) status of defined benefit plan, measured as difference between fair value of plan assets and benefit obligation. Includes, but is not limited to, overfunded (underfunded) status. + 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 45 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480535/715-20-45-2 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
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