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, 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 income (loss), 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, 2024	2,142,000,000	0	1,413,000,000	694,000,000	35,000,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	31,000,000			31,000,000
Other comprehensive income (loss), net of income taxes	(6,000,000)				(6,000,000)
Dividends (per share declared and paid)	(48,000,000)			(48,000,000)
Other	3,000,000		4,000,000	(1,000,000)
Ending balance at Mar. 31, 2025	$ 2,122,000,000	$ 0	$ 1,417,000,000	$ 676,000,000	$ 29,000,000