Retirement Benefits (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2011	Dec. 31, 2010
Defined Benefit Plan Disclosure [Line Items]
Profit sharing contribution accrued	$ 0	$ 0	$ 0	$ 0
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Contributions made to defined benefit pension plan	2.2	1.9	4.3	3.8
Expected contributions for the remainder of the fiscal year	$ 4.4		$ 4.4
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%