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Fair Value Measurements - Narrative (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gain related to observable price change	$ 2	$ 34
Loss related to observable price change			$ 1
Developed technology | Exchanges Segment
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impairment of assets	$ 3		$ 3

X

- Definition

Amount of loss from downward price adjustment on investment in equity security without readily determinable fair value.

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- Definition

Amount of gain from upward price adjustment on investment in equity security without readily determinable fair value.

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- Definition

The amount of impairment loss recognized in the period resulting from the write-down of the carrying amount of a finite-lived intangible asset to fair value.

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