v3.25.2
Cover - shares
 6 Months Ended
Jun. 30, 2025
Jul. 25, 2025
Entity Information [Line Items]    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Jun. 30, 2025  
Document Transition Report false  
Entity File Number 001-42012  
Entity Registrant Name UL Solutions Inc.  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 27-0913800  
Entity Address, Address Line One 333 Pfingsten Road  
Entity Address, City or Town Northbrook  
Entity Address, State or Province IL  
Entity Address, Postal Zip Code 60062  
City Area Code 847  
Local Phone Number 272-8800  
Title of 12(b) Security Class A Common Stock, par value $0.001 per share  
Trading Symbol ULS  
Security Exchange Name NYSE  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Non-accelerated Filer  
Entity Small Business false  
Entity Emerging Growth Company false  
Entity Shell Company false  
Entity Central Index Key 0001901440  
Current Fiscal Year End Date --12-31  
Document Fiscal Year Focus 2025  
Document Fiscal Period Focus Q2  
Amendment Flag false  
Common Class A    
Entity Information [Line Items]    
Entity Common Stock, Shares Outstanding   62,752,788
Common Class B    
Entity Information [Line Items]    
Entity Common Stock, Shares Outstanding   138,130,000