Segment Information - Revenues and Intersegment Revenues (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2025	Mar. 31, 2024
Segment Reporting Information [Line Items]
Total intersegment revenues	$ (799)	$ (688)
Corporate & Eliminations
Segment Reporting Information [Line Items]
Total intersegment revenues	3	6
Corporate & Eliminations \| ASC
Segment Reporting Information [Line Items]
Total intersegment revenues	3	6
Corporate & Eliminations \| IMS
Segment Reporting Information [Line Items]
Total intersegment revenues	$ 0	$ 0

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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+ Details