Net Periodic Pension Cost Recognized (Detail) - Pension Plans, Defined Benefit - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2014
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 94,650	$ 97,960	$ 99,929
Interest cost	181,469	176,556	190,999
Special termination cost	7,088	21,174	0
Settlements	5,102	0	0
Expected return on plan assets	(221,629)	(218,938)	(226,884)
Amortization of prior service cost	7,470	9,437	14,644
Amortization of unrecognized actuarial loss	170,407	152,664	159,584
Amortization of initial net obligation	17	17	19
Net periodic benefit cost	$ 244,574	$ 238,870	$ 238,291