CONDENSED CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) $ in Millions	Total	Common Stock	Preferred Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Income (Loss)	Retained Earnings
Balance at beginning of period at Dec. 31, 2023	$ 15,542	$ 0	$ 0	$ 8,783	$ (1,208)	$ 7,967
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	536					536
Other comprehensive income (loss)	(39)				(39)
Stock-based compensation	6			6
Dividends paid (Note 10)	(450)					(450)
Balance at end of period at Mar. 31, 2024	15,596	0	0	8,789	(1,246)	8,054
Balance at beginning of period at Dec. 31, 2024	15,193	0	0	8,814	(1,531)	7,909
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	499					499
Other comprehensive income (loss)	(28)				(28)
Stock-based compensation	8			8
Dividends paid (Note 10)	(350)					(350)
Balance at end of period at Mar. 31, 2025	$ 15,321	$ 0	$ 0	$ 8,822	$ (1,559)	$ 8,058