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Earnings Per Share (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Earnings Per Share [Abstract]      
Net income attributable to stockholders of UL Solutions $ 326 $ 260 $ 293
Basic weighted average common shares outstanding (in shares) 200 200 200
Effect of dilutive securities (in shares) 1 0 0
Diluted weighted average common shares outstanding (in shares) 201 200 200
Basic earnings per share attributable to stockholder of UL Solutions (in dollars per share) $ 1.63 $ 1.30 $ 1.47
Diluted earnings per share attributable to stockholder of UL Solutions (in dollars per share) $ 1.62 $ 1.30 $ 1.47