Net Periodic Pension Cost Recognized (Detail) (Pension Plans, Defined Benefit, USD $) In Thousands	3 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
Pension Plans, Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 21,624	$ 21,870
Interest cost	45,916	43,271
Expected return on plan assets	(50,169)	(48,733)
Amortization of prior service cost	3,484	3,129
Amortization of net actuarial loss	25,414	25,798
Amortization of initial net (asset)	(15)	(14)
Net benefit cost	$ 46,254	$ 45,321