FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS - Schedule of Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - USD ($) $ in Millions	Sep. 30, 2025	Jun. 30, 2025
Assets:
Equity and other securities	$ 942	$ 931
Fair Value, Recurring
Assets:
Equity and other securities	942	931
Total assets	952	943
Fair Value, Recurring | Interest rate derivatives - cash flow hedges | Cash Flow Hedging
Assets:
Derivative assets	10	12
Fair Value, Recurring | Level 1
Assets:
Equity and other securities	74	67
Total assets	74	67
Fair Value, Recurring | Level 1 | Interest rate derivatives - cash flow hedges | Cash Flow Hedging
Assets:
Derivative assets	0	0
Fair Value, Recurring | Level 2
Assets:
Equity and other securities	54	50
Total assets	64	62
Fair Value, Recurring | Level 2 | Interest rate derivatives - cash flow hedges | Cash Flow Hedging
Assets:
Derivative assets	10	12
Fair Value, Recurring | Level 3
Assets:
Equity and other securities	814	814
Total assets	814	814
Fair Value, Recurring | Level 3 | Interest rate derivatives - cash flow hedges | Cash Flow Hedging
Assets:
Derivative assets	$ 0	$ 0