Interim Financial Statements (Details) - USD ($) $ in Millions	Mar. 31, 2020	Jan. 01, 2020	Dec. 31, 2019	Jan. 01, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect of adopting Topic 326		$ 4.8		$ (0.9)
Accounts receivable, net	$ 298.2	504.5	$ 505.0
Allowance for doubtful accounts	6.8		7.3
Other non-current assets	448.5	382.5	388.5
Total Assets	6,014.1	6,077.4	6,083.9
Deferred income taxes	137.5	129.4	131.1
Total Liabilities	4,557.6	4,614.5	4,616.2
Retained earnings	1,436.2	1,397.0	1,401.8
Total Liabilities and Stockholders’ Equity	$ 6,014.1	6,077.4	$ 6,083.9
Accounting Standards Update 2016-13
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect of adopting Topic 326		4.8
Accounts receivable, net		(0.5)
Other non-current assets		(6.0)
Total Assets		(6.5)
Deferred income taxes		(1.7)
Total Liabilities		(1.7)
Retained earnings		(4.8)
Total Liabilities and Stockholders’ Equity		$ (6.5)