Assumptions Used in Estimating the Fair Value of Stock Award Grants (Detail) - $ / shares |
12 Months Ended | ||
|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2024 |
|
| Share based Compensation Arrangement by Share based Payment Award, Fair Value Assumptions, Method Used [Line Items] | |||
| Interest rates minimum | 3.40% | 3.40% | 3.80% |
| Interest rates maximum | 4.50% | 5.50% | 5.60% |
| Lower Limit | |||
| Share based Compensation Arrangement by Share based Payment Award, Fair Value Assumptions, Method Used [Line Items] | |||
| Dividends per share (quarterly amounts) | $ 0.83 | $ 0.75 | $ 0.68 |
| Upper Limit | |||
| Share based Compensation Arrangement by Share based Payment Award, Fair Value Assumptions, Method Used [Line Items] | |||
| Dividends per share (quarterly amounts) | $ 0.91 | $ 0.83 | $ 0.75 |