CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Statement of Comprehensive Income [Abstract]
Net Income	$ 572	$ 478
Other Comprehensive Income
Net unrealized gains on available-for-sale securities (net of taxes of $2 and $0, respectively)	5	0
Total other comprehensive income (loss)	5	0
Comprehensive Income	577	478
Preferred stock dividend requirement of subsidiary	3	3
Comprehensive Income Attributable to Common Shareholders	$ 574	$ 475