Retirement Benefits (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Mar. 31, 2012	Mar. 31, 2011	Mar. 31, 2012	Mar. 31, 2011
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Contributions made to defined benefit pension plans	$ 2.1	$ 2.0	$ 6.4	$ 5.8
Expected contributions for the remainder of the fiscal year	$ 2.3		$ 2.3
Retirement Savings Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Maximum employee contribution rate, pretax			50.00%
Safe harbor non-elective contribution rate			3.00%
Matching contribution rate			3.00%
Matching and profit contribution vesting rate			25.00%