Retirement Benefit Obligations - Schedule of Amounts Recognized in Accumulated Other Comprehensive Loss (Detail) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Defined Benefit Plan Disclosure [Line Items]
Actuarial losses (gains)	$ 452	$ 446
Prior service cost (benefit)	(21)	(25)
Net amounts recognized	431	421
Domestic Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Actuarial losses (gains)	118	126
Prior service cost (benefit)	0	0
Net amounts recognized	118	126
Foreign Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Actuarial losses (gains)	342	325
Prior service cost (benefit)	7	7
Net amounts recognized	349	332
Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Actuarial losses (gains)	(8)	(5)
Prior service cost (benefit)	(28)	(32)
Net amounts recognized	$ (36)	$ (37)