Income Taxes, Unrecognized Tax Benefits and Other Disclosures (Details) $ in Millions	12 Months Ended
	Dec. 31, 2017 USD ($) Jurisdiction	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)
Income Taxes [Abstract]
Unrecognized tax benefits, that would effect effective tax rate if recognized	$ 12.6
Unrecognized tax benefits offset by reduction of corresponding deferred tax asset	1.2
Reconciliation of Unrecognized Tax Benefits [Roll Forward]
Beginning balance	6.8	$ 4.8	$ 4.0
Gross increases for tax positions of prior years	11.2	3.1	0.0
Gross decreases for tax positions of prior years	0.0	0.0	(0.4)
Gross increases for tax positions of current year	0.6	0.0	1.8
Settlements	(6.2)	(0.4)	0.0
Lapse of statute of limitations	(0.3)	(0.7)	(0.6)
Changes due to currency fluctuations	0.5	0.0	0.0
Ending balance	12.6	6.8	4.8
Accrued interest and penalties	$ 0.8	3.0
Income Tax Contingency [Line Items]
Number of jurisdictions outside U.S. | Jurisdiction	33
Deferred tax liability for repatriation of unremitted foreign earnings	$ 114.0
Unremitted foreign earnings	(9.3)	$ (77.3)	$ (94.6)	$ (94.1)
Accumulated earnings of non-U.S. subsidiaries	287.0
Repatriate accumulated earnings	200.0
Income tax reconciliation withholding tax	$ 9.3
United Kingdom [Member] | Minimum [Member]
Income Tax Contingency [Line Items]
Year under examination	2012
United Kingdom [Member] | Maximum [Member]
Income Tax Contingency [Line Items]
Year under examination	2014
Germany [Member] | Minimum [Member]
Income Tax Contingency [Line Items]
Open tax year	2008
Year under examination	2011
Germany [Member] | Maximum [Member]
Income Tax Contingency [Line Items]
Open tax year	2010
Year under examination	2014
Italy [Member] | Minimum [Member]
Income Tax Contingency [Line Items]
Year under examination	2012
Italy [Member] | Maximum [Member]
Income Tax Contingency [Line Items]
Year under examination	2014
U.S. Federal [Member] | Minimum [Member]
Income Tax Contingency [Line Items]
Open tax year	2014
U.S. State and Local [Member] | Minimum [Member]
Income Tax Contingency [Line Items]
Open tax year	2013
Non U.S. [Member] | Minimum [Member]
Income Tax Contingency [Line Items]
Open tax year	2005