Restructuring Charges (Schedule of Restructuring Plan) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Restructuring Cost and Reserve [Line Items]
Total restructuring charges	$ 14	$ 9	$ 24	$ 15
Adenza restructuring
Restructuring Cost and Reserve [Line Items]
Total restructuring charges	14	9	24	15
Consulting services | Adenza restructuring
Restructuring Cost and Reserve [Line Items]
Total restructuring charges	6	1	10	2
Employee-related costs | Adenza restructuring
Restructuring Cost and Reserve [Line Items]
Total restructuring charges	3	7	7	11
Other | Adenza restructuring
Restructuring Cost and Reserve [Line Items]
Total restructuring charges	$ 5	$ 1	$ 7	$ 2