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Postretirement Benefits (Narrative) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Jun. 30, 2011	Jun. 30, 2010
Estimated medical cost trend rate for next fiscal year	10.00%	10.00%
Estimated ultimate trend rate for medical costs	5.00%	5.00%
Postretirement Benefits [Member]
Estimated employer contributions to postretirement benefit plans in next fiscal year	$ 0.2

The assumed health care cost trend rate for the next year used to measure the expected cost of benefits covered by the plan (gross eligible charges). This is based upon the annual rate of change in the cost of health care benefits currently provided by the postretirement benefit plan, due to factors other than changes in the composition of the plan population by age and dependency status.

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