Basis of Presentation (Details) $ in Millions	3 Months Ended
	Mar. 31, 2019 USD ($)
Business Acquisition [Line Items]
Operating lease right-of-use assets	$ 102.1
Lease liabilities	105.6
Increase to retained earnings	30.0
Accounting Standards Update 2016-02
Business Acquisition [Line Items]
Operating lease right-of-use assets	109.3
Lease liabilities	$ 109.3