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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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