XML 117 R104.htm IDEA: XBRL DOCUMENT v3.21.2
Assumptions Used in Estimating the Fair Value of Stock Award Grants (Detail) - $ / shares
 12 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2019
Share based Compensation Arrangement by Share based Payment Award, Fair Value Assumptions, Method Used [Line Items]      
Interest rates minimum 0.01% 0.10% 1.80%
Interest rates maximum 1.50% 2.20% 3.10%
Lower Limit      
Share based Compensation Arrangement by Share based Payment Award, Fair Value Assumptions, Method Used [Line Items]      
Dividends per share (quarterly amounts) $ 0.51 $ 0.46 $ 0.42
Upper Limit      
Share based Compensation Arrangement by Share based Payment Award, Fair Value Assumptions, Method Used [Line Items]      
Dividends per share (quarterly amounts) $ 0.56 $ 0.51 $ 0.46