CONDENSED CONSOLIDATED STATEMENTS OF SHAREHOLDERS’ EQUITY, UTILITY - USD ($) $ in Millions	Total	Utility	Total Shareholders' Equity	Total Shareholders' Equity Utility	Preferred Stock	Preferred Stock Utility	Common Stock	Common Stock Utility	Additional Paid-in Capital Utility	Reinvested Earnings	Reinvested Earnings Utility	Accumulated Other Comprehensive Income (Loss)	Accumulated Other Comprehensive Income (Loss) Utility
Beginning balance at Dec. 31, 2023	$ 25,292		$ 25,040	$ 29,524		$ 258	$ 30,374	$ 1,322	$ 30,570	$ (5,321)	$ (2,613)	$ (13)	$ (13)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	735	$ 781	735	781						735	781
Other comprehensive income (loss)	(1)	(1)	(1)	(1)								(1)	(1)
Equity contribution				440					440
Common stock dividend	(22)		(22)	(450)						(22)	(450)
Preferred stock dividend requirement				(3)							(3)
Ending balance at Mar. 31, 2024	25,983		25,731	30,291		258	30,356	1,322	31,010	(4,611)	(2,285)	(14)	(14)
Beginning balance at Dec. 31, 2024	30,401		30,149	35,550	$ 1,579	258	31,555	1,322	35,930	(2,966)	(1,940)	(19)	(20)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	634	695	634	695						634	695
Other comprehensive income (loss)	7	$ 7	7	7								7	7
Equity contribution				450					450
Common stock dividend	(55)		(55)	(575)						(55)	(575)
Preferred stock dividend requirement				(3)							(3)
Ending balance at Mar. 31, 2025	$ 30,937		$ 30,685	$ 36,124	$ 1,579	$ 258	$ 31,532	$ 1,322	$ 36,380	$ (2,414)	$ (1,823)	$ (12)	$ (13)