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Common Stock - Narrative (Details)
Jun. 30, 2024
vote
$ / shares
shares
Dec. 31, 2023
$ / shares
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
UL Solutions | UL Standards & Engagement Liabrary Access    
Class of Stock [Line Items]    
Ownership percentage 80.60%  
Voting power 97.60%  
Common 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  
Common 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