Retirement Benefit Obligations - Schedule of Components of Net Periodic Costs (Income) (Detail) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2016
Defined Benefit Plan Disclosure [Line Items]
Service cost benefits earned during the period	$ 6	$ 9	$ 10
Interest costs on projected benefit obligations	44	44	66
Expected return on plan assets	(71)	(75)	(81)
Amortization of deferred losses	23	21	18
Amortization of prior service costs	(3)	(4)	(7)
Settlements, curtailments and other	4	6	2
Net periodic benefits costs (income) - Total	3	1	8
United States [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost benefits earned during the period	0	0	0
Interest costs on projected benefit obligations	12	12	17
Expected return on plan assets	(18)	(18)	(19)
Amortization of deferred losses	5	5	4
Amortization of prior service costs	0	0	0
Settlements, curtailments and other	0	3	0
Net periodic benefits costs (income) - Total	(1)	2	2
Foreign Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost benefits earned during the period	6	9	10
Interest costs on projected benefit obligations	29	29	44
Expected return on plan assets	(53)	(57)	(62)
Amortization of deferred losses	18	16	14
Amortization of prior service costs	0	0	0
Settlements, curtailments and other	4	3	2
Net periodic benefits costs (income) - Total	4	0	8
Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost benefits earned during the period	0	0	0
Interest costs on projected benefit obligations	3	3	5
Expected return on plan assets	0	0	0
Amortization of deferred losses	0	0	0
Amortization of prior service costs	(3)	(4)	(7)
Settlements, curtailments and other	0	0	0
Net periodic benefits costs (income) - Total	$ 0	$ (1)	$ (2)