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Segments - Information on Segments and Reconciliation to Earnings Before Income Taxes from Continuing Operations- Additional Information (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2016
Jun. 30, 2016
Dec. 31, 2015
Operating Segments | Manufacturing      
Segment Reporting Information [Line Items]      
Inventory (principally raw materials and work-in-process) $ 19.4 $ 19.4 $ 19.4
Building | Operating Segments | Other      
Segment Reporting Information [Line Items]      
Gain on sale of corporate office building   11.1  
HomeSmart | Disposal Group, Disposed of by Sale, Not Discontinued Operations      
Segment Reporting Information [Line Items]      
Charge related to write down of disposal group   4.2  
Business exit costs $ 1.0 $ 1.4