Note 17  Sharebased Compensation  Performance Stock Units, Valuation Assumptions (Details)  Performance Shares [Member] 
12 Months Ended  

Jun. 30, 2023 
Jun. 30, 2022 
Jun. 30, 2021 

Volatility  47.70%  43.30%  56.00% 
Riskfree rate of return  3.16%  0.62%  0.14% 
Dividend yield  4.25%  3.79%  3.26% 
X  
 Definition The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term. Reference 1: http://www.xbrl.org/2003/role/disclosureRef

X  
 Definition The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probabilityweighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period. Reference 1: http://www.xbrl.org/2003/role/disclosureRef

X  
 Definition The riskfree interest rate assumption that is used in valuing an option on its own shares. Reference 1: http://www.xbrl.org/2003/role/disclosureRef

X  
 Details
