CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Statement of Comprehensive Income [Abstract]
Net Income	$ 360	$ 401	$ 838	$ 524
Other Comprehensive Income
Pension and other post-retirement benefit plans obligations (net of taxes of $0, $0, $0, and $0, respectively)	0	0	0	1
Net unrealized losses on available-for-sale securities (net of taxes of $2, $0, $2, and $0, respectively)	(5)	0	(5)	0
Total other comprehensive income (loss)	(5)	0	(5)	1
Comprehensive Income	355	401	833	525
Preferred stock dividend requirement of subsidiary	4	4	7	7
Comprehensive Income Attributable to Common Shareholders	$ 351	$ 397	$ 826	$ 518