CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Statement of Comprehensive Income [Abstract]
Net income	$ 579	$ 351	$ 1,838	$ 1,333
Other Comprehensive Income
Net unrealized gains (losses) on available-for-sale securities (net of taxes of $2, $0, $1, and $2, respectively)	4	(2)	3	3
Total other comprehensive income (loss)	4	(2)	3	3
Comprehensive Income	583	349	1,841	1,336
Preferred stock dividend requirement of subsidiary	3	3	10	10
Comprehensive Income (Loss) Attributable to Common Shareholders	$ 580	$ 346	$ 1,831	$ 1,326