Note 6. Credit Facilities Primary Credit Facility Textuals (Details) $ in Millions	Jun. 30, 2018 USD ($)	Jun. 30, 2017
Short-term Debt, Weighted Average Interest Rate, at Point in Time	2.67%	4.50%
Primary Credit Facility
Line of Credit Facility, Commitment Fee Basis Points, Minimum	20.0
Line of Credit Facility, Commitment Fee Basis Points, Maximum	25.0
Adjusted Leverage Ratio, Indebtedness Reduction For Excess Cash	$ 15
Adjusted Leverage Ratio Covenant	3.0
Fixed Charge Coverage Ratio Covenant	1.10