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Supplemental Cash Flow Information (Tables)
 3 Months Ended
Sep. 30, 2016
Supplemental Cash Flow Elements [Abstract]  
Schedule of Supplemental Cash Flow Information
     Three months ended
September 30,		  
     2016      2015  

Cash paid during the period for income taxes

    $ 3.3       $ 18.4   

Non-cash investing and financing activities:

      

Fair value adjustment on marketable investment securities recorded to other stockholder’s equity

      (0.4 )       0.1