Summary of Adjustments to Balance Sheet due to Adoption of Guidance (Details) - USD ($) $ in Millions	Mar. 31, 2019	Jan. 01, 2019	Dec. 31, 2018
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Property, Plant and Equipment, Net	$ 558.8	$ 563.0	$ 598.2
Other Assets	229.5	224.9	117.4
Accounts payable and accrued expenses	699.1	738.7	725.1
Deferred and Other Long-term Liabilities	238.1	245.2	203.9
Deferred Income Taxes	580.5	580.8	576.4
Retained earnings	$ 3,965.4	3,845.6	3,832.6
ASU 2016-02
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Property, Plant and Equipment, Net		(35.2)	35.0
Other Assets		107.5
Accounts payable and accrued expenses		13.6
Deferred and Other Long-term Liabilities		41.3
Deferred Income Taxes		4.4	4.0
Retained earnings		$ 13.0	$ 13.0