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, 2021	Jun. 30, 2020	Jun. 30, 2019
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Projected benefit obligation, beginning of the year	$ 1,513	$ 1,484
Service cost	2	2	$ 2
Interest cost	25	34	42
Benefits paid	(71)	(64)
Settlements	22	57
Actuarial loss (gain)	(10)	146
Foreign exchange rate changes	129	(32)
Amendments, transfers and other	(17)	0
Projected benefit obligation, end of the year	1,549	1,513	1,484
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets, beginning of the year	1,319	1,325
Actual return on plan assets	48	110
Employer contributions	35	30
Benefits paid	(63)	(56)
Settlements	(22)	(57)
Foreign exchange rate changes	130	(33)
Fair value of plan assets, end of the year	1,447	1,319	1,325
Funded status	(102)	(194)
Domestic Pension Benefits
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Projected benefit obligation, beginning of the year	353	350
Service cost	0	0	0
Interest cost	7	11	13
Benefits paid	(18)	(17)
Settlements	12	30
Actuarial loss (gain)	9	39
Foreign exchange rate changes	0	0
Amendments, transfers and other	0	0
Projected benefit obligation, end of the year	339	353	350
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets, beginning of the year	258	263
Actual return on plan assets	36	25
Employer contributions	21	17
Benefits paid	(18)	(17)
Settlements	(12)	(30)
Foreign exchange rate changes	0	0
Fair value of plan assets, end of the year	285	258	263
Funded status	(54)	(95)
Foreign Pension Benefits
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Projected benefit obligation, beginning of the year	1,051	1,025
Service cost	2	2	2
Interest cost	16	20	25
Benefits paid	(45)	(39)
Settlements	10	27
Actuarial loss (gain)	(18)	102
Foreign exchange rate changes	128	(32)
Amendments, transfers and other	0	0
Projected benefit obligation, end of the year	1,124	1,051	1,025
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets, beginning of the year	1,061	1,062
Actual return on plan assets	12	85
Employer contributions	14	13
Benefits paid	(45)	(39)
Settlements	(10)	(27)
Foreign exchange rate changes	130	(33)
Fair value of plan assets, end of the year	1,162	1,061	1,062
Funded status	38	10
Postretirement Benefits
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Projected benefit obligation, beginning of the year	109	109
Service cost	0	0	0
Interest cost	2	3	4
Benefits paid	(8)	(8)
Settlements	0	0
Actuarial loss (gain)	(1)	5
Foreign exchange rate changes	1	0
Amendments, transfers and other	(17)	0
Projected benefit obligation, end of the year	86	109	109
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets, beginning of the year	0	0
Actual return on plan assets	0	0
Employer contributions	0	0
Benefits paid	0	0
Settlements	0	0
Foreign exchange rate changes	0	0
Fair value of plan assets, end of the year	0	0	$ 0
Funded status	$ (86)	$ (109)