Business Acquisitions - Unaudited Pro Forma Revenue and Net Income (loss) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Business Combination, Asset Acquisition, Transaction between Entities under Common Control, and Joint Venture Formation [Abstract]
Revenue	$ 772	$ 779	$ 2,357	$ 2,404
Net (loss)	$ (90)	$ (144)	$ (9)	$ (165)