Recently Adopted and Issued Accounting Standards - Effect of Adoption of New Revenue Recognition Standard (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Jan. 01, 2018	Dec. 31, 2017
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Net sales	$ 1,186.2	$ 1,131.3	$ 3,472.4	$ 3,233.8
Other current liabilities	400.0		400.0			$ 562.0
Other non-current liabilities	615.1		615.1			490.8
Retained earnings	1,646.7		1,646.7			$ 1,735.2
Calculated under Revenue Guidance in Effect before Topic 606
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Net sales	1,185.9		3,471.0
Other current liabilities	399.2		399.2
Other non-current liabilities	611.4		611.4
ASU 2014-09
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Other current liabilities					$ 2.4
Retained earnings					$ 2.4
ASU 2014-09 | Difference Between Revenue Guidance In Effect Before And After Topic 606
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Net sales	0.3		1.4
Other current liabilities	0.8		0.8
Other non-current liabilities	$ 3.7		$ 3.7