Retirement Benefit Obligations - Schedule of Amounts Recognized in Accumulated Other Comprehensive (Loss) Income (Detail) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Defined Benefit Plan Disclosure [Line Items]
Actuarial losses (gains)	$ 574	$ 546
Prior service (benefit) cost	(41)	(54)
Net amounts recognized	533	492
Domestic Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Actuarial losses (gains)	131	108
Prior service (benefit) cost	0	0
Net amounts recognized	131	108
Foreign Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Actuarial losses (gains)	439	420
Prior service (benefit) cost	0	0
Net amounts recognized	439	420
Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Actuarial losses (gains)	4	18
Prior service (benefit) cost	(41)	(54)
Net amounts recognized	$ (37)	$ (36)