CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Statement of Comprehensive Income [Abstract]
Net Income	$ 410	$ 360	$ 982	$ 838
Other Comprehensive Income
Net unrealized gains (losses) on available-for-sale securities (net of taxes of $0, $2, $2 and $2 respectively)	0	(5)	5	(5)
Total other comprehensive income (loss)	0	(5)	5	(5)
Comprehensive Income	410	355	987	833
Preferred stock dividend requirement of subsidiary	4	4	7	7
Comprehensive Income Attributable to Common Shareholders	$ 406	$ 351	$ 980	$ 826