Other Intangible Assets, net and Goodwill - Intangible Assets by Major Class (Details) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Goodwill And Intangible Assets [Line Items]
Finite-lived intangible assets, Gross	$ 11,580.3	$ 11,680.5
Finite-lived intangible assets, Accumulated Amortization	(1,603.7)	(1,449.4)
Finite-lived intangible assets, Net	9,976.6	10,231.1
Total intangible assets, Gross	11,741.6	11,841.8
Total intangible assets, Net	10,137.9	10,392.4
Trade names
Goodwill And Intangible Assets [Line Items]
Indefinite-lived intangible assets	161.3	161.3
Customer relationships
Goodwill And Intangible Assets [Line Items]
Finite-lived intangible assets, Gross	8,155.7	8,279.1
Finite-lived intangible assets, Accumulated Amortization	(598.2)	(514.8)
Finite-lived intangible assets, Net	7,557.5	7,764.3
Databases and content
Goodwill And Intangible Assets [Line Items]
Finite-lived intangible assets, Gross	2,592.9	2,577.1
Finite-lived intangible assets, Accumulated Amortization	(635.9)	(591.0)
Finite-lived intangible assets, Net	1,957.0	1,986.1
Computer software
Goodwill And Intangible Assets [Line Items]
Finite-lived intangible assets, Gross	740.7	733.1
Finite-lived intangible assets, Accumulated Amortization	(341.9)	(320.1)
Finite-lived intangible assets, Net	398.8	413.0
Trade names
Goodwill And Intangible Assets [Line Items]
Finite-lived intangible assets, Gross	61.8	62.1
Finite-lived intangible assets, Accumulated Amortization	(13.2)	(10.5)
Finite-lived intangible assets, Net	48.6	51.6
Order or Production Backlog [Member]
Goodwill And Intangible Assets [Line Items]
Finite-lived intangible assets, Gross	29.2	29.1
Finite-lived intangible assets, Accumulated Amortization	(14.5)	(13.0)
Finite-lived intangible assets, Net	$ 14.7	$ 16.1