Annual report pursuant to Section 13 and 15(d)

Discontinued Operations - Narrative (Details)

v3.10.0.1
Discontinued Operations - Narrative (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]        
Proceeds from sale of discontinued operations $ 90.2 $ 0.0 $ 0.0  
Other Income 3.0      
Termination fee to cancel sublease before end of term 2.5      
Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax $ (153.8) $ 0.0 0.0  
DLW Subsidiary        
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]        
Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax     $ 1.7  
DLW Subsidiary | Discontinued operations        
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]        
Pension benefit liability       $ 115.0
Deferred tax asset and tax benefit       $ 43.4