Income Taxes (Summary Of Activity In Unrecognized Tax Benefits) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Unrecognized tax benefits, beginning balance	$ 38	$ 57	$ 37
Additions for tax positions of prior years	0	8	38
Reductions for tax positions of prior years	(5)	(6)	(2)
Settlements, decrease	(6)	(20)	(15)
Statute of limitations	0	(1)	(1)
Unrecognized tax benefits, ending balance	27	38	57
Unrecognized tax benefits that would impact effective income tax rate	27
Uncertain tax positions, reasonably possible increase or decrease during the next twelve months	7
Unrecognized tax benefits income tax net penalties and interest expense (benefits)	(2)	(1)	$ 1
Interest and penalties accrued	$ 2	$ 4