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	9 Months Ended
Sep. 30, 2026	Sep. 30, 2025	Sep. 30, 2026	Sep. 30, 2025
Increase (Decrease) in Temporary Equity [Roll Forward]
Opening balance	$ 292	$ 249	$ 287	$ 253
Net income (loss) attributable to redeemable non-controlling interests	5	1	13	(2)
Currency translation adjustments and other	(4)	0	(7)	(1)
Closing balance	$ 293	$ 250	$ 293	$ 250

Carrying amount, attributable to parent and noncontrolling interests, of an entity's issued and outstanding stock which is not included within permanent equity. Temporary equity is a security with redemption features that are outside the control of the issuer, is not classified as an asset or liability in conformity with GAAP, and is not mandatorily redeemable. Includes any type of security that is redeemable at a fixed or determinable price or on a fixed or determinable date or dates, is redeemable at the option of the holder, or has conditions for redemption which are not solely within the control of the issuer. Includes stock with a put option held by an ESOP and stock redeemable by a holder only in the event of a change in control of the issuer.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
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+ Details

- Definition

Adjustments to temporary equity resulting from foreign currency translation adjustments.

+ References

+ Details

- Definition

The portion of net income or loss attributable to temporary equity interest.

+ References

+ Details