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Incentive Plans Incentive Plans Equity Incentive Plan Policy: Valuation Assumptions (Details) - Equity Incentive Plans - Stock Options
12 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Expected volatility 16.50% 0.00%
Weighted-average volatility 16.50% 0.00%
Expected dividend yield 2.80% 0.00%
Expected term 7 years 6 months 0 years
Risk-free interest rate 2.10% 0.00%