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Basis of Presentation - Narrative (Details) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Mar. 31, 2014
Sep. 30, 2015
Sep. 30, 2014
Error Corrections and Prior Period Adjustments Restatement [Line Items]          
The effect to current period income tax expense and net income due to out of period adjustment     $ 1.6    
Tax effect per diluted share (in dollars per share)     $ 0.03    
Increase in net income and income from continuing operations $ 7.0 $ 10.8   $ 43.0 $ 22.1
Out of Period Tax Adjustments          
Error Corrections and Prior Period Adjustments Restatement [Line Items]          
Increase in net income and income from continuing operations     $ 1.6