Income Taxes And Tax-Related Items Reconciliation of the Beginning and Ending Amounts of Unrecognized Tax Benefits (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Income Tax Disclosure [Abstract]
Balance at January 1	$ 18	$ 19	$ 17
(Decrease) increase as a result of tax positions taken during a prior period	(2)	1	1
Increase as a result of tax positions taken during the current period	3	3	2
Decreases related to settlements with tax authorities	(3)	(3)	(1)
Reduction as a result of expiration of statue of limitations	0	(2)	0
Balance at December 31	$ 16	$ 18	$ 19