Supplemental Data (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2014
Cost Data:
Repairs and maintenance costs	$ 101.8	$ 114.7	$ 108.9
Noncash investing and financing activities:
Sale of equity method investment	12.6	0.0	0.0
Noncash purchases of property, equipment and software	15.1	17.3	65.5
Seller financed debt related to the purchase of software	0.0	4.9	0.0
Cash paid during the year for:
Interest payments, net	27.5	29.0	15.1
Income tax payment (refunds), net	$ 27.9	$ (27.1)	$ 70.8