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, 2023	Jun. 30, 2022	Jun. 30, 2021
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Projected benefit obligation, beginning of the year	$ 1,083	$ 1,549
Service cost	1	1	$ 2
Interest cost	40	25	25
Benefits paid	(70)	(68)
Settlements	(5)	(24)
Actuarial gain	(127)	(283)
Foreign exchange rate changes	24	(117)
Projected benefit obligation, end of the year	946	1,083	1,549
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets, beginning of the year	1,051	1,447
Actual return on plan assets	(92)	(215)
Employer contributions	14	29
Benefits paid	(63)	(61)
Settlements	(5)	(24)
Foreign exchange rate changes	28	(125)
Fair value of plan assets, end of the year	933	1,051	1,447
Funded status	$ (13)	$ (32)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Interest Cost, Statement of Income or Comprehensive Income [Extensible Enumeration]	Other, net	Other, net
Domestic Pension Benefits
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Projected benefit obligation, beginning of the year	$ 260	$ 339
Service cost	0	0	0
Interest cost	11	7	7
Benefits paid	(21)	(18)
Settlements	0	(12)
Actuarial gain	(9)	(56)
Foreign exchange rate changes	0	0
Projected benefit obligation, end of the year	241	260	339
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets, beginning of the year	220	285
Actual return on plan assets	5	(49)
Employer contributions	0	14
Benefits paid	(21)	(18)
Settlements	0	(12)
Foreign exchange rate changes	0	0
Fair value of plan assets, end of the year	204	220	285
Funded status	(37)	(40)
Foreign Pension Benefits
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Projected benefit obligation, beginning of the year	755	1,124
Service cost	1	1	2
Interest cost	27	17	16
Benefits paid	(42)	(43)
Settlements	(5)	(12)
Actuarial gain	(114)	(216)
Foreign exchange rate changes	24	(116)
Projected benefit obligation, end of the year	646	755	1,124
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets, beginning of the year	831	1,162
Actual return on plan assets	(97)	(166)
Employer contributions	14	15
Benefits paid	(42)	(43)
Settlements	(5)	(12)
Foreign exchange rate changes	28	(125)
Fair value of plan assets, end of the year	729	831	1,162
Funded status	83	76
Postretirement Benefits
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Projected benefit obligation, beginning of the year	68	86
Service cost	0	0	0
Interest cost	2	1	2
Benefits paid	(7)	(7)
Settlements	0	0
Actuarial gain	(4)	(11)
Foreign exchange rate changes	0	(1)
Projected benefit obligation, end of the year	59	68	86
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	$ (59)	$ (68)