INVESTMENTS - Schedule of Total Gains and Losses on Equity Securities (Details) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Mar. 31, 2026 |
Mar. 31, 2025 |
Mar. 31, 2026 |
Mar. 31, 2025 |
|
| Schedule of Investments [Abstract] | ||||
| Total gains (losses) recognized on equity securities | $ (21) | $ (12) | $ (34) | $ 16 |
| Less: Net gains (losses) recognized on equity securities sold | 0 | (1) | (1) | (1) |
| Unrealized gains (losses) recognized on equity securities held at end of period | $ (21) | $ (11) | $ (33) | $ 17 |