Pension and Other Postretirement Benefits (Details 8)	12 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
Pension and Other Postretirement Benefit Disclosures
Weighted-average asset allocation (as a percent)	100.00%	100.00%
Equity securities
Pension and Other Postretirement Benefit Disclosures
Weighted-average asset allocation (as a percent)	66.00%	66.10%
Fixed income securities
Pension and Other Postretirement Benefit Disclosures
Weighted-average asset allocation (as a percent)	31.30%	32.30%
Cash and cash equivalents
Pension and Other Postretirement Benefit Disclosures
Weighted-average asset allocation (as a percent)	2.70%	1.60%
U.S. Pension Plans | Equity securities
Pension and Other Postretirement Benefit Disclosures
Plan's current allocation policy (as a percent)	60.00%
U.S. Pension Plans | Fixed income securities
Pension and Other Postretirement Benefit Disclosures
Plan's current allocation policy (as a percent)	40.00%
Other Postretirement Plans | Equity securities
Pension and Other Postretirement Benefit Disclosures
Plan's current allocation policy (as a percent)	100.00%	100.00%