Supplemental Data (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013
Cost Data:
Repairs and maintenance costs	$ 114.7	$ 108.9	$ 101.9
Noncash investing and financing activities:
Noncash purchases of property, equipment and software	17.3	65.5	57.0
Loans Assumed	4.9	0.0	0.0
Cash paid during the year for:
Interest payments	29.0	15.1	16.8
Income tax (refunds) payments, net	$ (27.1)	$ 70.8	$ 51.2