Statement of Shareholders' Equity (Parenthetical) (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2010
Shareholders Equity [Line Items]
Pension and postretirement liability adjustment, tax	$ 0.8	$ 0.7	$ 0.5
Unrealized loss on available-for-sale securities, tax	2.6	1.3
Reclassification adjustment for other-than temporary impairment included in net income, tax	$ 4.0
Treasury stock acquired, Shares	2.2	9.2	14.2
Common stock dividends, per share	$ 0.64	$ 0.60	$ 0.56