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Retirement Benefits - Status of the Company Plans (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Components of prepaid (accrued) pension cost: |  |  |
Non-current benefit asset | $ 164,000,000 | $ 365,000,000 |
Postretirement Health Care Benefits Plan |  |  |
Change in benefit obligation: |  |  |
Benefit obligation at January 1 | 78,000,000 | 71,000,000 |
Service cost | 0 | 0 | $ 0
Interest cost | 2,000,000 | 1,000,000 | 2,000,000
Plan amendments | 46,000,000 | 0 |
Actuarial loss (gain) | (12,000,000) | 10,000,000 |
Foreign exchange valuation adjustment | 0 | 0 |
Benefit payments | (11,000,000) | (4,000,000) |
Benefit obligation at December 31 | 103,000,000 | 78,000,000 | 71,000,000
Change in plan assets: |  |  |
Fair value at January 1 | 186,000,000 | 181,000,000 |
Return on plan assets | (41,000,000) | 9,000,000 |
Company contributions | 0 | 0 |
Foreign exchange valuation adjustment | 0 | 0 |
Benefit payments | (11,000,000) | (4,000,000) |
Fair value at December 31 | 134,000,000 | 186,000,000 | 181,000,000
Funded status of the plan | 31,000,000 | 108,000,000 |
Unrecognized net loss | 70,000,000 | 31,000,000 |
Unrecognized prior service benefit (cost) | 46,000,000 | 0 |
Prepaid pension cost | 147,000,000 | 139,000,000 |
Components of prepaid (accrued) pension cost: |  |  |
Current benefit liability | 0 | 0 |
Non-current benefit liability | 0 | 0 |
Non-current benefit asset | 31,000,000 | 108,000,000 |
Deferred income taxes | 32,000,000 | 11,000,000 |
Accumulated other comprehensive loss | 84,000,000 | 20,000,000 |
Prepaid pension cost | 147,000,000 | 139,000,000 |
United States | Pension Benefit Plans |  |  |
Change in benefit obligation: |  |  |
Benefit obligation at January 1 | 5,140,000,000 | 5,226,000,000 |
Service cost | 0 | 0 | 0
Interest cost | 128,000,000 | 115,000,000 | 144,000,000
Plan amendments | 0 | 0 |
Actuarial loss (gain) | (1,329,000,000) | (71,000,000) |
Foreign exchange valuation adjustment | 0 | 0 |
Benefit payments | (130,000,000) | (130,000,000) |
Benefit obligation at December 31 | 3,809,000,000 | 5,140,000,000 | 5,226,000,000
Change in plan assets: |  |  |
Fair value at January 1 | 4,157,000,000 | 4,083,000,000 |
Return on plan assets | (954,000,000) | 201,000,000 |
Company contributions | 3,000,000 | 3,000,000 |
Foreign exchange valuation adjustment | 0 | 0 |
Benefit payments | (130,000,000) | (130,000,000) |
Fair value at December 31 | 3,076,000,000 | 4,157,000,000 | 4,083,000,000
Funded status of the plan | (733,000,000) | (983,000,000) |
Unrecognized net loss | 1,689,000,000 | 1,871,000,000 |
Unrecognized prior service benefit (cost) | 0 | 0 |
Prepaid pension cost | 956,000,000 | 888,000,000 |
Components of prepaid (accrued) pension cost: |  |  |
Current benefit liability | (3,000,000) | (3,000,000) |
Non-current benefit liability | (730,000,000) | (980,000,000) |
Non-current benefit asset | 0 | 0 |
Deferred income taxes | 403,000,000 | 454,000,000 |
Accumulated other comprehensive loss | 1,286,000,000 | 1,417,000,000 |
Prepaid pension cost | 956,000,000 | 888,000,000 |
Non U.S. | Pension Benefit Plans |  |  |
Change in benefit obligation: |  |  |
Benefit obligation at January 1 | 1,935,000,000 | 2,058,000,000 |
Service cost | 1,000,000 | 1,000,000 | 2,000,000
Interest cost | 29,000,000 | 21,000,000 | 29,000,000
Plan amendments | 0 | 0 |
Actuarial loss (gain) | (534,000,000) | (61,000,000) |
Foreign exchange valuation adjustment | (174,000,000) | (31,000,000) |
Benefit payments | (50,000,000) | (53,000,000) |
Benefit obligation at December 31 | 1,207,000,000 | 1,935,000,000 | 2,058,000,000
Change in plan assets: |  |  |
Fair value at January 1 | 1,870,000,000 | 1,880,000,000 |
Return on plan assets | (555,000,000) | 43,000,000 |
Company contributions | 8,000,000 | 9,000,000 |
Foreign exchange valuation adjustment | (181,000,000) | (9,000,000) |
Benefit payments | (50,000,000) | (53,000,000) |
Fair value at December 31 | 1,092,000,000 | 1,870,000,000 | $ 1,880,000,000
Funded status of the plan | (115,000,000) | (65,000,000) |
Unrecognized net loss | 758,000,000 | 655,000,000 |
Unrecognized prior service benefit (cost) | (70,000,000) | (77,000,000) |
Prepaid pension cost | 573,000,000 | 513,000,000 |
Components of prepaid (accrued) pension cost: |  |  |
Current benefit liability | 0 | 0 |
Non-current benefit liability | (185,000,000) | (297,000,000) |
Non-current benefit asset | 70,000,000 | 232,000,000 |
Deferred income taxes | 83,000,000 | 61,000,000 |
Accumulated other comprehensive loss | 605,000,000 | 517,000,000 |
Prepaid pension cost | $ 573,000,000 | $ 513,000,000 |

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