Present and Prospective Accounting Pronouncements Present and Prospective Accounting Pronouncements - Cumulative Effect of changes due to adoption of ASU 2014-09 and 2018-02 (Details) - USD ($) $ in Millions	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017	Dec. 31, 2016
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Receivables, net of allowance of doubtful accounts	$ 149.3	$ 142.5
Inventories	329.4	259.1
Deferred tax asset	2.5	2.5
Retained earnings	1,364.4	1,280.1
Accumulated comprehensive loss	(134.9)	$ (122.1)	$ (133.2)	$ (137.2)
Balance upon adoption [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Receivables, net of allowance of doubtful accounts	120.8
Inventories	274.9
Deferred tax asset	4.0
Retained earnings	1,292.4
Accumulated comprehensive loss	(138.8)
Accounting Standards Update 2014-09 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Receivables, net of allowance of doubtful accounts	(21.7)
Inventories	15.8
Deferred tax asset	1.5
Retained earnings	(4.4)
Accumulated comprehensive loss	0.0
Accounting Standards Update 2018-02 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Receivables, net of allowance of doubtful accounts	0.0
Inventories	0.0
Deferred tax asset	0.0
Retained earnings	16.7
Accumulated comprehensive loss	$ (16.7)