Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Earnings Per Share [Abstract]
Net income attributable to stockholder of UL Solutions	$ 56	$ 55
Basic weighted average common shares outstanding (in shares)	200	200
Effect of dilutive securities (in shares)	0	0
Diluted weighted average common shares outstanding (in shares)	200	200
Basic earnings per share attributable to stockholder of UL Solutions (in dollars per share)	$ 0.28	$ 0.28
Diluted earnings per share attributable to stockholder of UL Solutions (in dollars per share)	$ 0.28	$ 0.28