Retirement Benefits (Reconciliation of Net Actuarial Loss) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Changes in plan assets and benefit obligations recognized in other comprehensive income (loss):
Total amount recognized as change in plan assets and benefit obligations	$ 400	$ 503	$ (641)
Pension  Benefits
Recognized as component of net benefit (credit) cost:
Recognized as component of net benefit cost (credit)	240	214	209
Post-retirement Benefits
Recognized as component of net benefit (credit) cost:
Recognized as component of net benefit cost (credit)	5	2	(2)
U.S. | Pension  Benefits
Reconciliation of unrecognized net actuarial gain loss [Roll Forward]
Beginning balance	(1,347)	(1,419)
Recognized as component of net benefit (credit) cost:
Recognized as component of net benefit cost (credit)	21	19
Changes in plan assets and benefit obligations recognized in other comprehensive income (loss):
Other	0	(7)
Liability experience	107	20
Asset experience	(208)	40
Total amount recognized as change in plan assets and benefit obligations	(101)	53
Ending balance	(1,427)	(1,347)	(1,419)
U.S. | Post-retirement Benefits
Reconciliation of unrecognized net actuarial gain loss [Roll Forward]
Beginning balance	4	8
Recognized as component of net benefit (credit) cost:
Recognized as component of net benefit cost (credit)	0	(2)
Changes in plan assets and benefit obligations recognized in other comprehensive income (loss):
Other	0	0
Liability experience	(2)	(2)
Asset experience	0	0
Total amount recognized as change in plan assets and benefit obligations	(2)	(2)
Ending balance	2	4	8
Non-U.S. | Pension  Benefits
Reconciliation of unrecognized net actuarial gain loss [Roll Forward]
Beginning balance	(3,219)	(2,610)
Recognized as component of net benefit (credit) cost:
Recognized as component of net benefit cost (credit)	208	182	140
Amortization of net gain (loss)	10	3
Effect of settlement	2	2
Total recognized as component of net benefit cost (credit)	12	5
Changes in plan assets and benefit obligations recognized in other comprehensive income (loss):
Liability experience	(423)	226
Asset experience	831	191
Total amount recognized as change in plan assets and benefit obligations	(408)	(417)
Exchange rate adjustments	96	(197)
Ending balance	(3,519)	(3,219)	(2,610)
Non-U.S. | Post-retirement Benefits
Reconciliation of unrecognized net actuarial gain loss [Roll Forward]
Beginning balance	17	6
Recognized as component of net benefit (credit) cost:
Recognized as component of net benefit cost (credit)	5	1	(1)
Amortization of net gain (loss)	(5)	(1)
Effect of settlement	0	0
Total recognized as component of net benefit cost (credit)	(5)	(1)
Changes in plan assets and benefit obligations recognized in other comprehensive income (loss):
Liability experience	9	(10)
Asset experience	0	0
Total amount recognized as change in plan assets and benefit obligations	(9)	10
Exchange rate adjustments	0	2
Ending balance	$ 3	$ 17	$ 6