INVESTMENTS - Schedule of Total Gains and Losses on Equity Securities (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2024
Schedule of Investments [Abstract]
Total gains (losses) recognized on equity securities	$ (20)	$ 21	$ (13)
Less: Net gains (losses) recognized on equity securities sold or impaired	(1)	0	0
Unrealized gains (losses) recognized on equity securities held at end of period	$ (19)	$ 21	$ (13)