Restructuring Charges (Schedule of Restructuring Plan) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2026	Sep. 30, 2025	Sep. 30, 2026	Sep. 30, 2025
Restructuring Cost and Reserve [Line Items]
Total restructuring charges	$ 0	$ 12	$ 24	$ 27
Adenza restructuring
Restructuring Cost and Reserve [Line Items]
Total restructuring charges	0	12	24	27
Consulting services \| Adenza restructuring
Restructuring Cost and Reserve [Line Items]
Total restructuring charges	0	3	10	5
Employee-related costs \| Adenza restructuring
Restructuring Cost and Reserve [Line Items]
Total restructuring charges	0	7	7	18
Other \| Adenza restructuring
Restructuring Cost and Reserve [Line Items]
Total restructuring charges	$ 0	$ 2	$ 7	$ 4

- Definition

Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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