RETIREMENT BENEFIT OBLIGATIONS - Schedule of Amounts Recognized in Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2026	Jun. 30, 2025
Defined Benefit Plan Disclosure [Line Items]
Actuarial losses (gains)	$ 415	$ 443
Prior service cost (benefit)	(9)	(13)
Net amounts recognized	406	430
Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Actuarial losses (gains)	(8)	(6)
Prior service cost (benefit)	(15)	(20)
Net amounts recognized	(23)	(26)
Domestic Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Actuarial losses (gains)	109	118
Prior service cost (benefit)	0	0
Net amounts recognized	109	118
Foreign Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Actuarial losses (gains)	314	331
Prior service cost (benefit)	6	7
Net amounts recognized	$ 320	$ 338