Income Tax (Reconciliation of the Amount of Unrecognized Tax Benefits) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Unrecognized Tax Benefits [Roll Forward]
Unrecognized Tax Benefits Beginning balance, January 1	$ 33	$ 36	$ 34
Unrecognized Tax Benefits, Increases Resulting from Prior Period Tax Positions	2	9	3
Unrecognized Tax Benefits, Decreases Resulting from Prior Period Tax Positions	(9)	(15)	(4)
Unrecognized Tax Benefits, Increases Resulting from Current Period Tax Positions	7	3	3
Unrecognized Tax Benefits Ending balance, December 31	$ 33	$ 33	$ 36