Retirement Benefit Obligations - Schedule of Amounts Recognized in Accumulated Other Comprehensive (Loss) Income (Detail) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Defined Benefit Plan Disclosure [Line Items]
Actuarial losses (gains)	$ 612	$ 574
Prior service (benefit) cost	(34)	(41)
Net amounts recognized	578	533
Domestic Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Actuarial losses (gains)	158	131
Prior service (benefit) cost	0	0
Net amounts recognized	158	131
Foreign Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Actuarial losses (gains)	452	439
Prior service (benefit) cost	0	0
Net amounts recognized	452	439
Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Actuarial losses (gains)	2	4
Prior service (benefit) cost	(34)	(41)
Net amounts recognized	$ (32)	$ (37)