Segment Information - Schedule of Revenues and Intersegment Revenues (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Sep. 30, 2026	Sep. 30, 2025	Sep. 30, 2026	Sep. 30, 2025
Segment Reporting [Line Items]
Total intersegment revenues	$ (1,066)	$ (960)	$ (2,825)	$ (2,588)
Corporate & Eliminations
Segment Reporting [Line Items]
Total intersegment revenues	21	3	36	9
Corporate & Eliminations \| ASC
Segment Reporting [Line Items]
Total intersegment revenues	20	3	33	9
Corporate & Eliminations \| IMS
Segment Reporting [Line Items]
Total intersegment revenues	$ 1	$ 0	$ 3	$ 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

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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+ Details