Summary of Significant Accounting Policies (Supplemental Security Income Payment Calculations) (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2011
Accounting Policies [Abstract]
Impact of newly issued SSI ratios on revenue	$ 9.1
Impact of newly issued SSI ratios on net Income	5.3
Impact of newly issued SSI ratios, per diluted share	$ 0.07
Uninsured discount	$ 545.0	$ 451.4	$ 277.2