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Related Party Transactions (Details) - USD ($) $ in Millions | 1 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2023 | Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Related Party Transaction [Line Items] |  |  |  |
Dividends to stockholders of UL Solutions |  | $ 100 | $ 680 | $ 1,600
UL Standards & Engagement Transactions |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Incurred expenses |  | 22 | 21 | 21
Related Party |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Dividends to stockholders of UL Solutions | $ 600 | $ 83 | $ 680 | $ 1,600

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