RETIREMENT BENEFIT OBLIGATIONS - Schedule of Amounts Recognized in Balance Sheets (Details) - USD ($) $ in Millions	Jun. 30, 2026	Jun. 30, 2025
Defined Benefit Plan Disclosure [Line Items]
Other non-current assets	$ 169	$ 165
Other current liabilities	(10)	(10)
Retirement benefit obligations	(97)	(117)
Net amount recognized	62	38
Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Other non-current assets	0	0
Other current liabilities	(6)	(7)
Retirement benefit obligations	(44)	(48)
Net amount recognized	(50)	(55)
U.S.
Defined Benefit Plan Disclosure [Line Items]
Other non-current assets	3	0
Other current liabilities	(1)	0
Retirement benefit obligations	(6)	(19)
Net amount recognized	(4)	(19)
Foreign Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Other non-current assets	166	165
Other current liabilities	(3)	(3)
Retirement benefit obligations	(47)	(50)
Net amount recognized	$ 116	$ 112