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Basis of Presentation (Details) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Mar. 31, 2014
Jun. 30, 2015
Jun. 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    
Income from continuing operations, net of tax $ 10.1 $ 10.2   $ 36.0 $ 11.3
Out of Period Tax Adjustments          
Error Corrections and Prior Period Adjustments Restatement [Line Items]          
Income from continuing operations, net of tax     $ 1.6