Goodwill and Other Intangible Assets - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Goodwill [Line Items]
Document Period End Date	Dec. 31, 2019
Finite-Lived Intangible Assets, Gross	$ 1,072.8	$ 1,045.0
Payments to Acquire Businesses, Net of Cash Acquired	226.5	765.4	$ 346.8
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	84.4
Goodwill, Acquired During Period	46.1
Goodwill, Other Increase (Decrease)	$ (12.9)	(11.2)
Document Fiscal Year Focus	2019
Finite-Lived Intangible Assets, Accumulated Amortization	$ 444.5	416.7
Goodwill, Purchase Accounting Adjustments	$ (1.9)
Goodwill, Written off Related to Sale of Business Unit		$ 5.1
Finite-Lived Intangible Assets, Remaining Amortization Period	18 years 1 month 6 days	17 years 1 month 6 days
Goodwill and Other Intangible Assets (Textual) [Abstract]
Amortization expense for intangible assets	$ 57.3	$ 46.8	$ 40.0
Future Amortization Expense Year 2016	55.4
Future Amortization Expense Year 2017	51.4
Future Amortization Expense Year 2018	46.6
Future Amortization Expense Year 2019	43.7
Future Amortization Expense Year 2020	42.1
2019 Acquisitions [Member]
Goodwill [Line Items]
Payments to Acquire Businesses, Net of Cash Acquired	226.5
2018 Acquisitions [Member]
Goodwill [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net	$ 829.5	834.3
Payments to Acquire Businesses, Net of Cash Acquired		765.4
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles		375.4
Goodwill, Acquired During Period		465.0
Goodwill, Other Increase (Decrease)		$ 3.2
Minimum [Member]
Goodwill [Line Items]
Finite-Lived Intangible Asset, Useful Life	1 year
Minimum [Member] | 2019 Acquisitions [Member]
Goodwill [Line Items]
Finite-Lived Intangible Asset, Useful Life	2 years
Minimum [Member] | 2018 Acquisitions [Member]
Goodwill [Line Items]
Finite-Lived Intangible Asset, Useful Life		2 years