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Income Taxes - Reconciliations of Federal statutory rate to effective tax rate (Details)
12 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2019
Income Taxes      
Federal income tax rate 21.00% 21.00% 21.00%
State and local taxes, net of federal benefit 0.80% 1.70% 0.60%
Foreign income tax rates 4.20% 3.60% 4.10%
Changes in uncertain tax positions (6.80%) 5.20% (1.00%)
Global Intangible Low-Taxed Income 1.30% 6.20% 0.80%
Recognition of federal and foreign tax credits (2.10%) (0.90%) (2.50%)
Change in valuation allowance 0.50% 3.60%  
Other (0.70%) (0.80%) 0.50%
Effective tax rate 18.20% 39.60% 23.50%