EMPLOYEE BENEFIT PLANS - Schedule of Components of Net Periodic Benefit Cost (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2024
Defined Benefit Plan Disclosure [Line Items]
Total	$ 4	$ 2	$ 14
Retirement Income
Defined Benefit Plan Disclosure [Line Items]
Service cost	1	1	1
Interest cost	6	6	12
Fair value of plan assets	(1)	(1)	(2)
Amortization of unrecognized items	0	0	3
Curtailment gain recognized	0	0	(6)
Settlement loss recognized	0	(2)	179
Total	6	4	187
Retirement Health Care
Defined Benefit Plan Disclosure [Line Items]
Service cost	0	0	0
Interest cost	1	1	1
Fair value of plan assets	0	0	0
Amortization of unrecognized items	(2)	(2)	(2)
Curtailment gain recognized	0	0	0
Settlement loss recognized	0	0	0
Total	$ (1)	$ (1)	$ (1)