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Employee Benefit Plans (Summary of PSUs with Market or Performance Based Conditions Granted) (Details) - shares
shares in Thousands
12 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Performance awards granted 4,698    
Performance or Market-based Restricted Stock Units ("PSU")      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Performance awards granted 635 714 2,106
Performance awards earned 342 566 839