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Discontinued Operations (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
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	$ 0.0
Restructuring Charges									3.5	4.3
Disposal Group, Including Discontinued Operation, Other Income									0.1
Liabilities of discontinued operations:
Other income (expense)										0.0	(0.7)
Loss from discontinued operations before income taxes									0.1	0.0	(0.7)
Income tax (provision) benefit									0.0	0.0	(0.1)
Loss from discontinued operations	$ 0.0	$ 0.1	$ 0.0	$ 0.0	$ 0.0	$ 0.0	$ 0.0	$ 0.0	0.1	0.0	$ (0.8)
Discontinued Operations, Disposed of by Sale [Member]
Assets of discontinued operations:
Assets held for sale	1.0				1.0				1.0	1.0
Other assets	2.4				2.5				2.4	2.5
Liabilities of discontinued operations:
Current liabilities	$ 0.1				$ 0.1				$ 0.1	$ 0.1

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