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Earnings Per Share (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Earnings Per Share [Abstract]    
Net income attributable to stockholders of UL Solutions $ 67 $ 56
Basic weighted average common shares outstanding (in shares) 200 200
Effect of dilutive securities (in shares) 3 0
Diluted weighted average common shares outstanding (in shares) 203 200
Basic earnings per share attributable to stockholder of UL Solutions (in dollars per share) $ 0.34 $ 0.28
Diluted earnings per share attributable to stockholder of UL Solutions (in dollars per share) $ 0.33 $ 0.28