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Common Stock - Narrative (Details)
Dec. 31, 2024
vote
$ / shares
shares
Dec. 31, 2023
$ / shares
shares
Dec. 31, 2022
shares
Class of Stock [Line Items]      
Preferred stock authorized (in shares) 10,000,000    
Preferred stock, par value (in dollars per share) | $ / shares $ 0.001    
Preferred stock outstanding (in shares) 0 0 0
Preferred stock, issued (in shares) 0 0 0
UL Solutions | UL Standards & Engagement Liabrary Access      
Class of Stock [Line Items]      
Ownership percentage 69.00%    
Voting power 95.70%    
Class A      
Class of Stock [Line Items]      
Common stock authorized (in shares) 1,000,000,000 200,000,000  
Common stock, par value (in dollars per share) | $ / shares $ 0.001 $ 0.001  
Votes per share | vote 1    
Class B      
Class of Stock [Line Items]      
Common stock authorized (in shares) 500,000,000 200,000,000  
Common stock, par value (in dollars per share) | $ / shares $ 0.001 $ 0.001  
Votes per share | vote 10