Retirement Benefit Obligations - Schedule of Amounts Recognized in Balance Sheets (Detail) - USD ($) $ in Millions	Jun. 30, 2017	Jun. 30, 2016
Defined Benefit Plan Disclosure [Line Items]
Other non-current assets	$ 17	$ 4
Other current liabilities	(10)	(10)
Retirement benefit obligations	(319)	(350)
Net amount recognized	(312)	(356)
Domestic Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Other non-current assets	0	0
Other current liabilities	0	0
Retirement benefit obligations	(91)	(109)
Net amount recognized	(91)	(109)
Foreign Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Other non-current assets	17	4
Other current liabilities	(1)	(1)
Retirement benefit obligations	(120)	(124)
Net amount recognized	(104)	(121)
Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Other non-current assets	0	0
Other current liabilities	(9)	(9)
Retirement benefit obligations	(108)	(117)
Net amount recognized	$ (117)	$ (126)