Share-Based Compensation (Schedule of Total Share-Based Compensation Expense by Type of Award) (Details) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Dec. 31, 2022 |
Dec. 31, 2021 |
Dec. 31, 2022 |
Dec. 31, 2021 |
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||
| Total share-based compensation | $ 25 | $ 18 | $ 48 | $ 42 |
| Restricted Share Unit | ||||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||
| Total share-based compensation | 15 | 17 | 32 | 35 |
| Performance Share Unit | ||||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||
| Total share-based compensation | $ 10 | $ 1 | $ 16 | $ 7 |