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Business Acquisitions and Disposition (Details) - USD ($) $ in Millions		3 Months Ended
	Mar. 17, 2021	Mar. 31, 2022	Dec. 31, 2021
Business Acquisition [Line Items]
Goodwill		$ 14,094.9	$ 14,094.5
Sedaru, Inc.
Business Acquisition [Line Items]
Sale of investment	$ 27.1
Pretax gain on sale of investment	$ 27.1
Other acquisitions
Business Acquisition [Line Items]
Aggregate purchase price		49.8
Goodwill		25.6
Other identifiable intangibles		23.3
Other acquisitions \| Customer related intangibles
Business Acquisition [Line Items]
Other identifiable intangibles		$ 20.9
Weighted average useful life of finite-lived intangible assets (in years)		15 years 1 month 6 days
Other acquisitions \| Technology
Business Acquisition [Line Items]
Other identifiable intangibles		$ 2.4
Weighted average useful life of finite-lived intangible assets (in years)		5 years 3 months 18 days