Summary of Adjustments to Balance Sheet due to Adoption of Guidance (Details) - USD ($) $ in Millions	Dec. 31, 2019	Jan. 01, 2019	Dec. 31, 2018	Jan. 01, 2018	Dec. 31, 2017
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Property, Plant and Equipment, Net	$ 573.0	$ 563.0	$ 598.2
Other Assets	288.8	224.9	117.4
Accounts payable and accrued expenses	831.9	738.7	725.1	$ 662.1	$ 659.1
Deferred and Other Long-term Liabilities	315.5	222.2	180.9
Deferred Income Taxes	579.6	580.8	576.4
Retained earnings	$ 4,237.4	3,845.6	3,832.6	$ 3,477.3	$ 3,479.0
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