FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS - Summary of Company’s Assets Measured at Fair Value on Recurring Basis (Details) - USD ($) $ in Millions	Jun. 30, 2026	Jun. 30, 2025
Assets:
Equity and other securities	$ 907	$ 931
Fair Value, Measurements, Recurring
Assets:
Equity and other securities	907	931
Total assets	913	943
Fair Value, Measurements, Recurring | Interest Rate Contract | Cash Flow Hedging
Assets:
Interest rate derivatives—cash flow hedges	6	12
Fair Value, Measurements, Recurring | Level 1
Assets:
Equity and other securities	48	67
Total assets	48	67
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	57	50
Total assets	63	62
Fair Value, Measurements, Recurring | Level 2 | Interest Rate Contract | Cash Flow Hedging
Assets:
Interest rate derivatives—cash flow hedges	6	12
Fair Value, Measurements, Recurring | Level 3
Assets:
Equity and other securities	802	814
Total assets	802	814
Fair Value, Measurements, Recurring | Level 3 | Interest Rate Contract | Cash Flow Hedging
Assets:
Interest rate derivatives—cash flow hedges	$ 0	$ 0