Basis of Presentation, Principles of Consolidation, and Summary of Significant Accounting Policies - Changes in Redeemable Non-Controlling Interests (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Increase (Decrease) in Temporary Equity [Roll Forward]
Opening balance	$ 292	$ 255	$ 287	$ 253
Net income (loss) attributable to redeemable non-controlling interests	3	(1)	8	(3)
Currency translation adjustments and other	(3)	(5)	(3)	(1)
Closing balance	$ 292	$ 249	$ 292	$ 249