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RETIREMENT BENEFIT OBLIGATIONS - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2023
Defined Benefit Plan Disclosure [Line Items]
Net pension and postretirement benefits liability	$ 38	$ 12
Net periodic benefit costs	10	28	$ 13
Pension plan contributions for next fiscal year	$ 1
Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Pension asset portfolio, percentage	10.00%
Fixed Income Securities
Defined Benefit Plan Disclosure [Line Items]
Pension asset portfolio, percentage	86.00%
Cash And Other
Defined Benefit Plan Disclosure [Line Items]
Pension asset portfolio, percentage	4.00%
Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Accumulated pension benefit obligations	$ 818	$ 816