v3.26.1
Share-Based Compensation (Additional Data Related to Restricted Share Unit Activity) (Details) - USD ($)
$ in Millions
12 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2024
Restricted Share Units      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Total compensation cost, net of estimated forfeitures, related to nonvested restricted share and share unit awards not yet recognized, pre-tax $ 74 $ 64 $ 71
Weighted-average period in years over which restricted share and share unit cost is expected to be recognized (in years) 2 years 2 years 2 years
Total fair value of shares vested during the year $ 60 $ 60 $ 63
Award vesting period (in years) 3 years    
Performance Share Units      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Total compensation cost, net of estimated forfeitures, related to nonvested restricted share and share unit awards not yet recognized, pre-tax $ 49 $ 47 $ 46
Weighted-average period in years over which restricted share and share unit cost is expected to be recognized (in years) 2 years 2 years 2 years
Total fair value of shares vested during the year $ 108 $ 49 $ 20