CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Statement of Comprehensive Income [Abstract]
Net Income	$ 478	$ 123
Other Comprehensive Income
Pension and other postretirement benefit plans obligations (net of taxes of $0 and $0, respectively)	0	1
Total other comprehensive income (loss)	0	1
Comprehensive Income (Loss)	478	124
Preferred stock dividend requirement of subsidiary	3	3
Comprehensive Income Available for Common Shareholders	$ 475	$ 121