EMPLOYEE BENEFIT PLANS - Narrative (Details) - USD ($) $ in Millions	3 Months Ended			9 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2025	Mar. 31, 2024
Defined Benefit Plan Disclosure [Line Items]
One-time noncash settlement charge, net of curtailment gain	$ 0	$ 0		$ 0	$ 171
Net periodic benefit cost	3	1		0	11
Retirement Health Care
Defined Benefit Plan Disclosure [Line Items]
Net periodic benefit cost	0	(1)		(1)	(1)
UNITED STATES | Retirement Income
Defined Benefit Plan Disclosure [Line Items]
One-time noncash settlement charge, net of curtailment gain			$ 171
One-time noncash settlement charge, net of curtailment gain, after tax			$ 130
Retirement plan contributions	$ 8	$ 8		$ 12	$ 12