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Related Party Transactions (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2025 | Mar. 31, 2024
Related Party Transaction [Line Items] |  |
Dividends to stockholders of UL Solutions | $ 26 | $ 25
UL Standards & Engagement Transactions |  |
Related Party Transaction [Line Items] |  |
Incurred expenses | 5 | 5
Related Party |  |
Related Party Transaction [Line Items] |  |
Dividends to stockholders of UL Solutions | $ 18 | $ 25

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