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Business Acquisitions (Details) $ in Millions					9 Months Ended
Business Acquisitions (Details) $ in Millions	Aug. 21, 2023 USD ($)	Aug. 07, 2023 USD ($)	Aug. 04, 2023 USD ($)	May 02, 2023 USD ($)	Sep. 30, 2023 USD ($) acquisition	Sep. 30, 2022 USD ($)	Dec. 31, 2022 USD ($)
Business Acquisition [Line Items]
Goodwill					$ 17,047.6		$ 15,946.1
Payments to acquire business					1,970.1	$ 580.9
Promium, LLC
Business Acquisition [Line Items]
Aggregate purchase price				$ 16.5
Goodwill					1,137.8
Other identifiable intangibles					$ 792.7
Number of business acquisitions \| acquisition					3
Promium, LLC \| Trade names
Business Acquisition [Line Items]
Intangible assets acquired, not subject to amortization					$ 30.7
Promium, LLC \| Customer related intangibles
Business Acquisition [Line Items]
Other identifiable intangibles					$ 710.1
Weighted average useful life of finite-lived intangible assets (in years)					19 years 2 months 12 days
Promium, LLC \| Technology
Business Acquisition [Line Items]
Other identifiable intangibles					$ 82.6
Weighted average useful life of finite-lived intangible assets (in years)					6 years 7 months 6 days
Syntellis Performance Solutions, LLC
Business Acquisition [Line Items]
Aggregate purchase price		$ 1,381.0
Federal tax attributes		$ 135.0
Weighted average useful life of finite-lived intangible assets (in years)		15 years
Replicon Inc.
Business Acquisition [Line Items]
Aggregate purchase price	$ 447.5
Federal tax attributes	$ 80.0
Weighted average useful life of finite-lived intangible assets (in years)	15 years
Certinia Inc.
Business Acquisition [Line Items]
Payments to acquire business			$ 125.0
Certinia Inc. \| Certinia Inc.
Business Acquisition [Line Items]
Equity method investment, ownership percentage			18.20%