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Discontinued Operations (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposal Group, Including Discontinued Operation, Revenue	$ 0.0	$ 0.0
Less: Loss from discontinued operations	(0.4)	0.0
Liabilities of discontinued operations:
Restructuring Charges	0.4		$ 3.5
Disposal Group, Including Discontinued Operation, Other Expense	(0.4)	0.0
Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax	(0.4)	0.0
Discontinued Operation, Tax Effect of Discontinued Operation	0.0	$ 0.0
Discontinued Operations, Disposed of by Sale [Member]
Assets of discontinued operations:
Current assets	1.0		1.0
Other assets	1.9		2.4
Liabilities of discontinued operations:
Current liabilities	$ 0.1		$ 0.1

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