FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS - Summary of Assets and Liabilities Measured At Fair Value on Recurring Basis (Details) - USD ($) $ in Millions	Jun. 30, 2025	Jun. 30, 2024
Assets:
Equity and other securities	$ 931	$ 214
Fair Value, Measurements, Recurring
Assets:
Equity and other securities	931	214
Total assets	943	242
Fair Value, Measurements, Recurring \| Interest Rate Contract \| Cash Flow Hedging
Assets:
Interest rate derivatives—cash flow hedges	12	28
Fair Value, Measurements, Recurring \| Level 1
Assets:
Equity and other securities	67	53
Total assets	67	53
Fair Value, Measurements, Recurring \| Level 1 \| Interest Rate Contract \| Cash Flow Hedging
Assets:
Interest rate derivatives—cash flow hedges	0	0
Fair Value, Measurements, Recurring \| Level 2
Assets:
Equity and other securities	50	39
Total assets	62	67
Fair Value, Measurements, Recurring \| Level 2 \| Interest Rate Contract \| Cash Flow Hedging
Assets:
Interest rate derivatives—cash flow hedges	12	28
Fair Value, Measurements, Recurring \| Level 3
Assets:
Equity and other securities	814	122
Total assets	814	122
Fair Value, Measurements, Recurring \| Level 3 \| Interest Rate Contract \| Cash Flow Hedging
Assets:
Interest rate derivatives—cash flow hedges	$ 0	$ 0