Retirement Benefit Obligations - Schedule of Change in Projected Benefit Obligation, Change in Fair Value of Plan Assets and Funded Status (Detail) - USD ($) $ in Millions		12 Months Ended
		Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation, beginning of the year		$ 1,723	$ 1,787
Service cost		9	10	$ 12
Interest cost		44	66	72
Benefits paid		(70)	(81)
Settlements	[1]	(36)	(44)
Actuarial loss/(gain)	[2]	47	179
Foreign exchange rate changes		(15)	(190)
Plan curtailments		0	(4)
Amendments, transfers and other		(1)	0
Projected benefit obligation, end of the year		1,701	1,723	1,787
Beginning balance		1,367	1,506
Actual return on plan assets		106	121
Employer contributions		26	26
Benefits paid		(62)	(73)
Settlements	[1]	(36)	(44)
Foreign exchange rate changes		(12)	(169)
Amendments, transfers and other		0	0
Ending balance		1,389	1,367	1,506
Funded status		(312)	(356)
Domestic Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation, beginning of the year		396	382
Service cost		0	0	1
Interest cost		12	17	17
Benefits paid		(23)	(18)
Settlements	[1]	(13)	(11)
Actuarial loss/(gain)	[2]	(4)	28
Foreign exchange rate changes		0	0
Plan curtailments		0	(2)
Amendments, transfers and other		0	0
Projected benefit obligation, end of the year		368	396	382
Beginning balance		287	302
Actual return on plan assets		23	14
Employer contributions		3	0
Benefits paid		(23)	(18)
Settlements	[1]	(13)	(11)
Foreign exchange rate changes		0	0
Amendments, transfers and other		0	0
Ending balance		277	287	302
Funded status		(91)	(109)
Foreign Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation, beginning of the year		1,201	1,272
Service cost		9	10	11
Interest cost		29	44	49
Benefits paid		(39)	(55)
Settlements	[1]	(23)	(33)
Actuarial loss/(gain)	[2]	54	153
Foreign exchange rate changes		(15)	(188)
Plan curtailments		0	(2)
Amendments, transfers and other		0	0
Projected benefit obligation, end of the year		1,216	1,201	1,272
Beginning balance		1,080	1,204
Actual return on plan assets		83	107
Employer contributions		23	26
Benefits paid		(39)	(55)
Settlements	[1]	(23)	(33)
Foreign exchange rate changes		(12)	(169)
Amendments, transfers and other		0	0
Ending balance		1,112	1,080	1,204
Funded status		(104)	(121)
Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation, beginning of the year		126	133
Service cost		0	0	0
Interest cost		3	5	6
Benefits paid		(8)	(8)
Settlements	[1]	0	0
Actuarial loss/(gain)	[2]	(3)	(2)
Foreign exchange rate changes		0	(2)
Plan curtailments		0	0
Amendments, transfers and other		(1)	0
Projected benefit obligation, end of the year		117	126	133
Beginning balance		0	0
Actual return on plan assets		0	0
Employer contributions		0	0
Benefits paid		0	0
Settlements	[1]	0	0
Foreign exchange rate changes		0	0
Amendments, transfers and other		0	0
Ending balance		0	0	$ 0
Funded status		$ (117)	$ (126)

[1] Amounts related to payments made to former employees of the Company in full settlement of their deferred pension benefits.

[2] Fiscal 2017 actuarial losses for the Company's foreign pension plans are primarily related to the decrease in discount rates used in measuring plan obligations as of June 30, 2017. Fiscal 2017 actuarial gains related to domestic pension plans primarily relate to the increase in discount rates for the U.S. plans used in measuring plan obligations as of June 30, 2017. Fiscal 2016 actuarial losses for the Company's pension plans are primarily related to the reduction in discount rates used in measuring plan obligations as of June 30, 2016.