COMMON STOCK - Common Stock Outstanding (Details) - shares	12 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2022
Common Class A
Increase (Decrease) in Stockholders' Equity
Balance at the beginning of the period (in shares)	232,077,900	231,513,500	233,517,400
Acquisition of treasury stock (in shares)	(316,500)	(1,220,700)	(7,393,600)
Conversion of Class B to Class A (in shares)			2,700,000
Stock-based compensation (in shares)	1,385,200	1,785,100	2,689,700
Balance at the end of the period (in shares)	233,146,600	232,077,900	231,513,500
Common Class B
Increase (Decrease) in Stockholders' Equity
Balance at the beginning of the period (in shares)	125,542,029	125,542,000	128,242,000
Acquisition of treasury stock (in shares)	0	0	0
Conversion of Class B to Class A (in shares)			(2,700,000)
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