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COMMON STOCK - Common Stock Outstanding (Details) - shares
12 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2023
Common Class A      
Increase (Decrease) in Stockholders' Equity      
Balance at the beginning of the period (in shares) 233,146,600 232,077,900 231,513,500
Acquisition of treasury stock (in shares) (482,500) (316,500) (1,220,700)
Stock-based compensation (in shares) 1,560,700 1,385,200 1,785,100
Balance at the end of the period (in shares) 234,224,800 233,146,600 232,077,900
Common Class B      
Increase (Decrease) in Stockholders' Equity      
Balance at the beginning of the period (in shares) 125,542,029 125,542,000 125,542,000
Acquisition of treasury stock (in shares) 0 0 0
Stock-based compensation (in shares) 0 0 0
Balance at the end of the period (in shares) 125,542,029 125,542,029 125,542,000