Employee Benefit Plans (Pension Plans' Target Asset Allocation Ranges) (Details))	12 Months Ended
	Jun. 30, 2012
United States Fixed Income Securities [Member]
Pension plan asset allocation rate, minimum	35.00%
Pension plan asset allocation rate, maximum	45.00%
United States Equity Securities [Member]
Pension plan asset allocation rate, minimum	37.00%
Pension plan asset allocation rate, maximum	50.00%
International Equity Securities [Member]
Pension plan asset allocation rate, minimum	12.00%
Pension plan asset allocation rate, maximum	20.00%