Income Taxes (Components of Income Tax Expense) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2011
Provision for income taxes from continuing operations [Abstract]
Current federal	$ 13.5	$ 2.2	$ 2.4
Current state	4.8	4.5	3.1
Total current	18.3	6.7	5.5
Deferred federal	24.2	19.7	2.3
Deferred state	1.6	1.2	(4.9)
Total deferred	25.8	20.9	(2.6)
Change in valuation allowance	(3.3)	(5.4)	5.7
Total income tax expense (benefit)	40.8	22.2	8.6
Income taxes associated with continuing operations and discontinued operations [Abstract]
Continuing operations	40.8	22.2	8.6
Discontinued operations	0	(0.3)	(3.6)
Total	$ 40.8	$ 21.9	$ 5.0