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Accounting Policies and Basis of Presentation - Narrative (Details)
$ in Millions
 3 Months Ended
Mar. 31, 2017
USD ($)
segment
Mar. 31, 2016
USD ($)
Error Corrections and Prior Period Adjustments Restatement [Line Items]    
Number of reportable segments | segment 1  
Shares received per parent share   1
Loss on debt extinguishment $ 0.0 $ 76.3
Loss from continuing operations 36.0 192.7
Tax expense (1.5) (107.7)
Net cash used for operating activities of continuing operations (32.5) (163.4)
Net cash used for operating activities of discontinued operations $ 0.0 46.8
Revisions    
Error Corrections and Prior Period Adjustments Restatement [Line Items]    
Loss on debt extinguishment   4.3
Overstated income tax expense   0.8
Loss from continuing operations   3.5
Comprehensive loss   2.6
Retained earnings adjustment   2.6
Tax expense   0.8
Net cash used for operating activities of continuing operations   16.2
Net cash used for operating activities of discontinued operations   $ 16.2