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Note 11. Income Taxes - Accrued Interest and Penalties Related to Unrecognized Tax Benefits (Details) - USD ($)
$ in Millions
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2019
Income Tax Contingency      
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued $ 1.2 $ 1.6 $ 1.6