Accumulated Other Comprehensive Loss - Schedule of Comprehensive Income (Loss) Attributable to Minority Shareholders (Details) - USD ($) $ in Millions	3 Months Ended				6 Months Ended		9 Months Ended	12 Months Ended
	Jun. 30, 2025	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Jun. 30, 2025	Jun. 30, 2024	Sep. 30, 2024	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Equity [Abstract]
Net Income (Loss) Attributable to Minority Shareholders	$ 27	$ 1	$ (6)	$ (1)	$ 30	$ (7)	$ (6)	$ (11)	$ (2)	$ 4
Other Comprehensive Income (Loss):
Foreign currency translation	5		(1)		8	(4)
Other Comprehensive Income (Loss)	5		(1)		8	(4)
Comprehensive Income (Loss) Attributable to Minority Shareholders	$ 32	$ 9	$ (7)	$ (4)	$ 38	$ (11)	$ (2)	$ (12)	$ 2	$ (13)