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Significant Accounting Policies (Details 16) - USD ($)
$ in Millions
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2013
Comprehensive Income      
Foreign translation adjustments $ 6.5 $ 9.4 $ 7.3
Maximum      
Comprehensive Income      
Net unrealized gains (losses) on available for sale securities $ (0.1) $ 0.1 $ (0.1)