Segment Information - Revenues and Intersegment Revenues (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Segment Reporting Information [Line Items]
Total intersegment revenues	$ (3,234)	$ (2,826)	$ (2,693)
Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Total intersegment revenues	22	26	23
Intersegment Eliminations [Member] | ASC
Segment Reporting Information [Line Items]
Total intersegment revenues	21	25	21
Intersegment Eliminations [Member] | IMS
Segment Reporting Information [Line Items]
Total intersegment revenues	$ 1	$ 1	$ 2