Income Taxes (Reconciliation of Beginning and Ending Unrecognized Tax Benefits) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Reconciliation of Unrecognized Tax Benefits
Balance at beginning of year	$ 53	$ 74	$ 64
Additions based on tax positions related to the current year	1	0	0
Additions for tax positions of prior years	16	40	12
Reductions for tax positions due to lapse of statutes of limitations	0	(5)	0
Reductions for tax positions of prior years	0	(23)	(2)
Tax settlements	(1)	(33)	0
Balance at end of year	$ 69	$ 53	$ 74