Retirement Benefit Obligations - Schedule of Amounts Recognized in Balance Sheets (Detail) - USD ($) $ in Millions	Jun. 30, 2015	Jun. 30, 2014
Defined Benefit Plan Disclosure [Line Items]
Other non-current assets	$ 36	$ 67
Other current liabilities	(12)	(12)
Retirement benefit obligations	(305)	(272)
Net amount recognized	(281)	(217)
Domestic Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Other non-current assets	0	0
Other current liabilities	0	0
Retirement benefit obligations	(80)	(49)
Net amount recognized	(80)	(49)
Foreign Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Other non-current assets	36	67
Other current liabilities	(1)	(1)
Retirement benefit obligations	(103)	(84)
Net amount recognized	(68)	(18)
Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Other non-current assets	0	0
Other current liabilities	(11)	(11)
Retirement benefit obligations	(122)	(139)
Net amount recognized	$ (133)	$ (150)