CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Statement of Comprehensive Income [Abstract]
Net income	$ 549	$ 524	$ 1,183	$ 1,259
Other Comprehensive Income (Loss)
Pension and other postretirement benefit plans obligations (net of taxes of $0, $0, $0 and $0 respectively)	0	0	1	0
Net unrealized gains (losses) on available-for-sale securities (net of taxes of $3, $0, $5 and $1 respectively)	8	0	14	(1)
Total other comprehensive income (loss)	8	0	15	(1)
Comprehensive Income	557	524	1,198	1,258
Preferred stock dividend requirement	28	4	55	7
Comprehensive Income Attributable to Common Shareholders	$ 529	$ 520	$ 1,143	$ 1,251