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Discontinued Operations (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 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	$ 0.0	$ 0.0
Less: Loss from discontinued operations	0.0	0.0	(0.4)	0.0
Liabilities of discontinued operations:
Disposal Group, Including Discontinued Operation, Other Expense	0.0	0.0	(0.4)	0.0
Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax	0.0	0.0	(0.4)	0.0
Discontinued Operation, Tax Effect of Discontinued Operation	0.0	$ 0.0	0.0	$ 0.0
Discontinued Operations, Disposed of by Sale [Member]
Assets of discontinued operations:
Current assets	0.8		0.8		$ 1.0
Other assets	1.9		1.9		2.4
Liabilities of discontinued operations:
Current liabilities	$ 0.1		$ 0.1		$ 0.1

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