Consolidated Statements of Stockholders' Equity - USD ($) $ in Millions	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Income
Beginning balance at Dec. 31, 2021	$ 1,756	$ 0	$ 1,381	$ 365	$ 10
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	258			258
Other comprehensive income (loss), net of income taxes	42				42
Dividends	(192)			(192)
Other	4		4
Ending balance at Dec. 31, 2022	1,868	0	1,385	431	52
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	298			298
Other comprehensive income (loss), net of income taxes	(2)				(2)
Dividends	(192)			(192)
Other	11		11
Ending balance at Dec. 31, 2023	1,983	0	1,396	537	50
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	352			352
Other comprehensive income (loss), net of income taxes	(15)				(15)
Dividends	(192)			(192)
Other	14		17	(3)
Ending balance at Dec. 31, 2024	$ 2,142	$ 0	$ 1,413	$ 694	$ 35