Condensed Consolidated Statements of Stockholder's Equity - USD ($) $ in Millions	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Loss	Non-controlling Interests
Balances, beginning of period at Dec. 31, 2022	$ 1,077	$ 0	$ 1,009	$ 211	$ (166)	$ 23
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	58			55		3
Dividend to stockholder of UL Solutions	(20)			(20)
Other comprehensive (loss) income, net of tax	7				7
Balances, end of period at Mar. 31, 2023	1,122	0	1,009	246	(159)	26
Balances, beginning of period at Dec. 31, 2023	678	0	776	24	(146)	24
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	60			56		4
Dividend to stockholder of UL Solutions	(25)			(25)
Dividend to non-controlling interest	(15)
Other comprehensive (loss) income, net of tax	(15)				(14)	(1)
Balances, end of period at Mar. 31, 2024	$ 683	$ 0	$ 776	$ 55	$ (160)	$ 12