Income Taxes (Schedule of Unrecognized Tax Benefits Roll Forward) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance at January 1	$ 46	$ 53	$ 53
Additions based on tax positions related to the current year	0	0	0
Additions for tax positions of prior years	48	2	7
Reductions for tax positions of prior years	(2)	(2)	(7)
Settlements	(1)	(7)	0
Expiration of statute of limitations	0	0	0
Balance at December 31	$ 91	$ 46	$ 53