Acquisitions and Discontinued Operations - Additional Information (Details) - USD ($) $ in Millions	1 Months Ended	12 Months Ended
	Feb. 28, 2019	Dec. 31, 2018	Dec. 31, 2020	Dec. 31, 2019
Business Acquisition [Line Items]
Goodwill		$ 2,072.7	$ 2,392.2	$ 2,258.3
Discontinued Operations
Business Acquisition [Line Items]
Separation costs		$ 84.2
Aquion
Business Acquisition [Line Items]
Payments to acquire businesses	$ 163.4
Goodwill	101.9
Business Acquisition, Goodwill, Expected Tax Deductible Amount	4.6
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Indefinite-Lived Intangible Assets	$ 15.7
Useful life	15 years
Finite-lived intangible assets acquired	$ 78.8
Pelican
Business Acquisition [Line Items]
Payments to acquire businesses	121.1
Goodwill	118.0
Business Acquisition, Goodwill, Expected Tax Deductible Amount	$ 7.6