Condensed Consolidated Statements of Stockholders' Equity - USD ($)	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Income
Beginning balance at Dec. 31, 2022	$ 1,868,000,000	$ 0	$ 1,385,000,000	$ 431,000,000	$ 52,000,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	17,000,000			17,000,000
Other comprehensive (loss) income, net of income taxes	(13,000,000)				(13,000,000)
Dividends (per share declared and paid)	(48,000,000)			(48,000,000)
Other	1,000,000		1,000,000
Ending balance at Mar. 31, 2023	1,825,000,000	0	1,386,000,000	400,000,000	39,000,000
Beginning balance at Dec. 31, 2022	1,868,000,000	0	1,385,000,000	431,000,000	52,000,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	83,000,000
Ending balance at Jun. 30, 2023	1,859,000,000	0	1,389,000,000	418,000,000	52,000,000
Beginning balance at Mar. 31, 2023	1,825,000,000	0	1,386,000,000	400,000,000	39,000,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	66,000,000			66,000,000
Other comprehensive (loss) income, net of income taxes	13,000,000				13,000,000
Dividends (per share declared and paid)	(48,000,000)			(48,000,000)
Other	3,000,000		3,000,000
Ending balance at Jun. 30, 2023	1,859,000,000	0	1,389,000,000	418,000,000	52,000,000
Beginning balance at Dec. 31, 2023	1,983,000,000	0	1,396,000,000	537,000,000	50,000,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	49,000,000			49,000,000
Other comprehensive (loss) income, net of income taxes	3,000,000				3,000,000
Dividends (per share declared and paid)	(48,000,000)			(48,000,000)
Other	2,000,000		3,000,000	(1,000,000)
Ending balance at Mar. 31, 2024	1,989,000,000	0	1,399,000,000	537,000,000	53,000,000
Beginning balance at Dec. 31, 2023	1,983,000,000	0	1,396,000,000	537,000,000	50,000,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	145,000,000
Ending balance at Jun. 30, 2024	2,040,000,000	0	1,404,000,000	585,000,000	51,000,000
Beginning balance at Mar. 31, 2024	1,989,000,000	0	1,399,000,000	537,000,000	53,000,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	97,000,000			97,000,000
Other comprehensive (loss) income, net of income taxes	(2,000,000)				(2,000,000)
Dividends (per share declared and paid)	(48,000,000)			(48,000,000)
Other	4,000,000		5,000,000	(1,000,000)
Ending balance at Jun. 30, 2024	$ 2,040,000,000	$ 0	$ 1,404,000,000	$ 585,000,000	$ 51,000,000