Postretirement Benefits (Narrative) (Details) - Other Postretirement Benefits Plan [Member] - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Total recognized in other comprehensive income	$ 8
Total recognized in net periodic benefit cost or OCI	(2)	$ 44	$ 27
Non-U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Total recognized in net periodic benefit cost or OCI	$ 0	$ 0	$ 1