Income Taxes (Details 5) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2011
Income Taxes
Balance, beginning	$ 2.3	$ 1.9	$ 3.6
Additions based on tax positions of prior years	0.6		0.3
Additions based on tax positions of current years		0.4
Reductions as a result of a lapse of statute of limitations	(1.3)		(2.0)
Reductions based on tax positions of prior year	(0.2)
Balance, ending	1.4	2.3	1.9
Offsetting tax benefits	1.1
Unrecognized tax benefits that, if recognized would affect the entity's effective tax rate	0.3	0.8	0.4
Income tax expense (benefits) related to interest and benefit	(0.3)	0.4	(0.3)
Amount of interest and penalties accrued	$ 0.6	$ 0.7
Statute of limitations period for state tax audits, low end of range	4 years
Statute of limitations period for state tax audits, high end of range	6 years