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Supplemental Cash Flow Information (Tables)
 3 Months Ended
Sep. 30, 2015
Supplemental Cash Flow Elements [Abstract]  
Schedule of Supplemental Cash Flow Information
     Three months ended
September 30,		  
     2015      2014  

Cash paid during the period for income taxes

    $ 18.4       $ 11.1   

Non-cash investing and financing activities:

      

Fair value adjustment on marketable investment securities recorded to stockholders’ equity

    $ 0.1       $ (0.2 )