Retirement Benefits (Assumptions Used To Determine Benefit Obligations And Net Periodic Pension And Postretirement Benefit Costs) (Detail)	12 Months Ended
Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2010
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Benefit obligation discount rates for pension plans minimum	0.60%	4.70%	4.50%
Benefit obligation rates of compensation increase for pension plans, minimum	0.00%	2.50%	2.50%
Net periodic discount rates for pension plans, minimum	4.70%	4.10%	4.50%
Net periodic rates of compensation increase for pension plans, minimum	0.00%	2.50%	2.50%
Benefit obligation discount rates for pension plans maximum	5.00%	5.90%	5.00%
Benefit obligation rates of compensation increase for pension plans, maximum	4.00%	4.00%	4.00%
Net periodic discount rates for pension plans, maximum	5.90%	5.60%	6.17%
Net periodic rates of compensation increase for pension plans, maximum	4.00%	4.00%	4.00%

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