Present and Prospective Accounting Pronouncements Cumulative effect of adoption of 2014-09 and 2018-02 (Details) - USD ($) $ in Millions	Dec. 31, 2018	Jan. 01, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Receivables, net of allowance for doubtful accounts	$ 127.6		$ 142.5
Inventories	273.0		259.1
Deferred tax asset			2.5
Retained earnings	1,612.6		1,280.1
Accumulated comprehensive loss	$ (146.4)		$ (122.1)	$ (137.2)	$ (146.1)
Balance upon adoption [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Receivables, net of allowance for 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 for 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 for doubtful accounts		0.0
Inventories		0.0
Deferred tax asset		0.0
Retained earnings		16.7
Accumulated comprehensive loss		$ (16.7)