FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS - Schedule of Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - USD ($) $ in Millions	Sep. 30, 2026	Jun. 30, 2026
Assets:
Equity and other securities	$ 953	$ 907
Fair Value, Recurring
Assets:
Equity and other securities	953	907
Total assets	958	913
Fair Value, Recurring | Interest rate derivatives—cash flow hedges | Cash Flow Hedging
Assets:
Interest rate derivatives—cash flow hedges	5	6
Fair Value, Recurring | Level 1
Assets:
Equity and other securities	87	48
Total assets	87	48
Fair Value, Recurring | Level 1 | Interest rate derivatives—cash flow hedges | Cash Flow Hedging
Assets:
Interest rate derivatives—cash flow hedges	0	0
Fair Value, Recurring | Level 2
Assets:
Equity and other securities	62	57
Total assets	67	63
Fair Value, Recurring | Level 2 | Interest rate derivatives—cash flow hedges | Cash Flow Hedging
Assets:
Interest rate derivatives—cash flow hedges	5	6
Fair Value, Recurring | Level 3
Assets:
Equity and other securities	804	802
Total assets	804	802
Fair Value, Recurring | Level 3 | Interest rate derivatives—cash flow hedges | Cash Flow Hedging
Assets:
Interest rate derivatives—cash flow hedges	$ 0	$ 0