Retirement Benefits - Status of the Company Plans (Details) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Components of prepaid (accrued) pension cost:
Non-current benefit asset	$ 98,000,000	$ 164,000,000
Postretirement Health Care Benefits Plan
Change in benefit obligation:
Benefit obligation at January 1	103,000,000	78,000,000
Service cost	0	0	$ 0
Interest cost	5,000,000	2,000,000	1,000,000
Plan amendments	0	46,000,000
Actuarial loss (gain)	2,000,000	(12,000,000)
Foreign exchange valuation adjustment	0	0
Benefit payments	(14,000,000)	(11,000,000)
Benefit obligation at December 31	96,000,000	103,000,000	78,000,000
Change in plan assets:
Fair value at January 1	134,000,000	186,000,000
Return on plan assets	14,000,000	(41,000,000)
Company contributions	0	0
Foreign exchange valuation adjustment	0	0
Benefit payments	(14,000,000)	(11,000,000)
Fair value at December 31	134,000,000	134,000,000	186,000,000
Funded status of the plan	38,000,000	31,000,000
Unrecognized net loss	68,000,000	70,000,000
Unrecognized prior service benefit (cost)	44,000,000	46,000,000
Prepaid pension cost	150,000,000	147,000,000
Components of prepaid (accrued) pension cost:
Current benefit liability	0	0
Non-current benefit liability	0	0
Non-current benefit asset	38,000,000	31,000,000
Deferred income taxes	31,000,000	32,000,000
Accumulated other comprehensive loss	81,000,000	84,000,000
Prepaid pension cost	150,000,000	147,000,000
United States | Pension Benefit Plans
Change in benefit obligation:
Benefit obligation at January 1	3,809,000,000	5,140,000,000
Service cost	0	0	0
Interest cost	190,000,000	128,000,000	115,000,000
Plan amendments	0	0
Actuarial loss (gain)	59,000,000	(1,329,000,000)
Foreign exchange valuation adjustment	0	0
Benefit payments	(130,000,000)	(130,000,000)
Benefit obligation at December 31	3,928,000,000	3,809,000,000	5,140,000,000
Change in plan assets:
Fair value at January 1	3,076,000,000	4,157,000,000
Return on plan assets	324,000,000	(954,000,000)
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	3,273,000,000	3,076,000,000	4,157,000,000
Funded status of the plan	(655,000,000)	(733,000,000)
Unrecognized net loss	1,695,000,000	1,689,000,000
Unrecognized prior service benefit (cost)	0	0
Prepaid pension cost	1,040,000,000	956,000,000
Components of prepaid (accrued) pension cost:
Current benefit liability	(2,000,000)	(3,000,000)
Non-current benefit liability	(653,000,000)	(730,000,000)
Non-current benefit asset	0	0
Deferred income taxes	403,000,000	403,000,000
Accumulated other comprehensive loss	1,292,000,000	1,286,000,000
Prepaid pension cost	1,040,000,000	956,000,000
Non U.S. | Pension Benefit Plans
Change in benefit obligation:
Benefit obligation at January 1	1,207,000,000	1,935,000,000
Service cost	1,000,000	1,000,000	1,000,000
Interest cost	56,000,000	29,000,000	21,000,000
Plan amendments	0	0
Actuarial loss (gain)	62,000,000	(534,000,000)
Foreign exchange valuation adjustment	66,000,000	(174,000,000)
Benefit payments	(45,000,000)	(50,000,000)
Benefit obligation at December 31	1,347,000,000	1,207,000,000	1,935,000,000
Change in plan assets:
Fair value at January 1	1,092,000,000	1,870,000,000
Return on plan assets	56,000,000	(555,000,000)
Company contributions	9,000,000	8,000,000
Foreign exchange valuation adjustment	60,000,000	(181,000,000)
Benefit payments	(45,000,000)	(50,000,000)
Fair value at December 31	1,172,000,000	1,092,000,000	$ 1,870,000,000
Funded status of the plan	(175,000,000)	(115,000,000)
Unrecognized net loss	829,000,000	758,000,000
Unrecognized prior service benefit (cost)	(67,000,000)	(70,000,000)
Prepaid pension cost	587,000,000	573,000,000
Components of prepaid (accrued) pension cost:
Current benefit liability	0	0
Non-current benefit liability	(210,000,000)	(185,000,000)
Non-current benefit asset	35,000,000	70,000,000
Deferred income taxes	102,000,000	83,000,000
Accumulated other comprehensive loss	660,000,000	605,000,000
Prepaid pension cost	$ 587,000,000	$ 573,000,000