Deferred Revenue (Estimated Deferred Revenue) (Details) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Fiscal Year Ended [Abstract]
2022	$ 594
2023	65
2024	33
2025	21
2026	15
2027+	7
Total	735	$ 448
Market Technology
Fiscal Year Ended [Abstract]
2022	101
2023	8
2024	1
2025	1
2026	0
2027+	0
Total	111	117
Investment Intelligence
Fiscal Year Ended [Abstract]
2022	115
2023	11
2024	0
2025	0
2026	0
2027+	0
Total	126	106
Initial Listings
Fiscal Year Ended [Abstract]
2022	37
2023	37
2024	27
2025	18
2026	15
2027+	7
Total	141	145
Annual Listings
Fiscal Year Ended [Abstract]
2022	270
2023	0
2024	0
2025	0
2026	0
2027+	0
Total	270	2
Other
Fiscal Year Ended [Abstract]
2022	11
2023	6
2024	5
2025	2
2026	0
2027+	0
Total	24	21
IR & ESG Services
Fiscal Year Ended [Abstract]
2022	60
2023	3
2024	0
2025	0
2026	0
2027+	0
Total	$ 63	$ 57

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Contract With Customer, Liability, Expected To Be Recognized In Year Four

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Contract With Customer, Liability, Expected To Be Recognized, Remainder Of Fiscal Year

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Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable.

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