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Postretirement Benefit Plans - Benefit Obligations and Plan Assets (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Change in plan assets |  |  |
Funded status at end of year | $ 61 | $ 303 |
U.S. | Defined Benefit |  |  |
Change in plan benefit obligation |  |  |
Benefit obligation at beginning of year: | 895 | 1,097 |
Service cost | 15 | 21 | $ 18
Interest cost | 29 | 30 | 31
Participant contributions | 0 | 0 |
Benefits paid | (12) | (12) |
Settlements | (309) | (162) |
Curtailments | 0 | 0 |
Actuarial loss (gain) | (97) | (79) |
Effects of exchange rate changes | 0 | 0 |
Benefit obligation at end of year | 521 | 895 | 1,097
Change in plan assets |  |  |
Fair value of plan assets at beginning of year: | 934 | 1,061 |
Actual return on plan assets | (205) | 37 |
Participant contributions | 0 | 0 |
Benefits paid | (12) | (12) |
Settlements | (309) | (162) |
Effects of exchange rate changes | 0 | 0 |
Fair value of plan assets at end of year | 421 | 934 | 1,061
Funded status at end of year | (100) | 39 |
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 | 13 | 10 |
U.S. | Retiree Health Care |  |  |
Change in plan benefit obligation |  |  |
Benefit obligation at beginning of year: | 360 | 389 |
Service cost | 3 | 3 | 3
Interest cost | 11 | 10 | 13
Participant contributions | 15 | 14 |
Benefits paid | (41) | (38) |
Settlements | 0 | 0 |
Curtailments | 0 | 0 |
Actuarial loss (gain) | (74) | (18) |
Effects of exchange rate changes | 0 | 0 |
Benefit obligation at end of year | 274 | 360 | 389
Change in plan assets |  |  |
Fair value of plan assets at beginning of year: | 385 | 389 |
Actual return on plan assets | (80) | 19 |
Participant contributions | 15 | 14 |
Benefits paid | (41) | (38) |
Settlements | 0 | 0 |
Effects of exchange rate changes | 0 | 0 |
Fair value of plan assets at end of year | 280 | 385 | 389
Funded status at end of year | 6 | 25 |
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: | 2,574 | 2,868 |
Service cost | 25 | 36 | 34
Interest cost | 33 | 37 | 38
Participant contributions | 5 | 9 |
Benefits paid | (86) | (101) |
Settlements | (91) | (12) |
Curtailments | (4) | 0 |
Actuarial loss (gain) | (547) | (111) |
Effects of exchange rate changes | (242) | (152) |
Benefit obligation at end of year | 1,667 | 2,574 | 2,868
Change in plan assets |  |  |
Fair value of plan assets at beginning of year: | 2,813 | 3,008 |
Actual return on plan assets | (557) | 75 |
Participant contributions | 5 | 9 |
Benefits paid | (86) | (101) |
Settlements | (91) | (12) |
Effects of exchange rate changes | (271) | (173) |
Fair value of plan assets at end of year | 1,822 | 2,813 | $ 3,008
Funded status at end of year | 155 | 239 |
Non-U.S. | Defined Benefit | Qualified Plan |  |  |
Change in plan assets |  |  |
Defined Benefit Plan, Plan Assets, Contributions by Employer | 9 | 7 |
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 increase (decrease) in plan assets of defined benefit plan from actual return (loss) determined by change in fair value of plan assets adjusted for contributions, benefit payments, and other expenses. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b)(1) -URI https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI https://asc.fasb.org/extlink&oid=123450688&loc=d3e4179-114921 + Details
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- Definition Amount of gain (loss) from change in actuarial assumptions which (increases) decreases benefit obligation of defined benefit plan. Assumptions include, but are not limited to, interest, mortality, employee turnover, salary, and temporary deviation from substantive plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a)(4) -URI https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 + Details
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- Definition Amount of contributions received by defined benefit plan from participant which increase benefit obligation. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a)(3) -URI https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 + Details
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