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Common Stock (Tables)
12 Months Ended
Jun. 30, 2021
Equity [Abstract]  
Schedule of Stock Repurchases
Repurchases of the Company’s common and class B stock were as follows:

Years ended June 30,202120202019
(In millions)
Number of shares0.1 0.1 0.2 
Cost at market value$2.9 $4.7 $10.0