Retirement Benefits (Reconciliation of Prior Service Credit) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Pension  Benefits
Recognized as component of net benefit (credit) cost:
Total recognized as component of net benefit (credit) cost	$ (214)	$ (209)	$ (240)
Post-retirement Benefits
Recognized as component of net benefit (credit) cost:
Total recognized as component of net benefit (credit) cost	(2)	2	2
Prior Service Credit (Cost)
Recognized as component of net benefit (credit) cost:
Recognized as component of net benefit cost (credit)	(2)	(2)	(2)
Non-U.S. | Pension  Benefits
Recognized as component of net benefit (credit) cost:
Total recognized as component of net benefit (credit) cost	(182)	(140)	(187)
Non-U.S. | Post-retirement Benefits
Recognized as component of net benefit (credit) cost:
Total recognized as component of net benefit (credit) cost	(1)	1	2
Non-U.S. | Prior Service Credit (Cost) | Pension  Benefits
Reconciliation of prior service (cost) credit recognized in accumulated other comprehensive income (loss):
Beginning balance	(16)	(18)
Recognized as component of net benefit (credit) cost:
Recognized as component of net benefit cost (credit)	0	0
Total recognized as component of net benefit (credit) cost	0	0
Changes in plan assets and benefit obligations recognized in other comprehensive income (loss):
Exchange rate adjustments	(1)	2
Ending balance	(17)	(16)	(18)
Non-U.S. | Prior Service Credit (Cost) | Post-retirement Benefits
Reconciliation of prior service (cost) credit recognized in accumulated other comprehensive income (loss):
Beginning balance	5	7
Recognized as component of net benefit (credit) cost:
Recognized as component of net benefit cost (credit)	(2)	(2)
Total recognized as component of net benefit (credit) cost	(2)	(2)
Changes in plan assets and benefit obligations recognized in other comprehensive income (loss):
Exchange rate adjustments	0	0
Ending balance	$ 3	$ 5	$ 7