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, 2020	$ 1,615	$ 0	$ 1,381	$ 233	$ 1
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	324			324
Other comprehensive income, net of income taxes	9				9
Dividends	(192)			(192)
Ending 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, 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, 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