v3.26.1
Investments - Additional Information (Details) - USD ($)
12 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2024
Investments, All Other Investments [Abstract]      
Gross proceeds from matured or redeemed securities $ 1,000,000,000.0 $ 1,300,000,000 $ 1,500,000,000
Equity securities held at cost 40,396,000 40,277,000  
Impairment loss 0 4,600,000 14,100,000
Equity securities, upward adjustment 0 $ 2,600,000 0
Equity securities, downward adjustment $ 0   $ 0