Segment Information - Total Assets by Segment (Details) - USD ($) $ in Millions	Mar. 31, 2025	Dec. 31, 2024
Segment Reporting Information [Line Items]
Total assets	$ 4,096	$ 4,184
Operating Segments | ASC
Segment Reporting Information [Line Items]
Total assets	2,389	2,249
Operating Segments | IMS
Segment Reporting Information [Line Items]
Total assets	1,248	1,225
Corporate & Eliminations
Segment Reporting Information [Line Items]
Total assets	$ 459	$ 710