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Share-Based Compensation (Narrative) (Details) shares in Thousands, $ in Millions | 12 Months Ended
--- | ---
Jun. 30, 2024 USD ($) grantees shares | Jun. 30, 2023 USD ($) shares | Jun. 30, 2022 USD ($) shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Share-Based Payment Arrangement, Plan Modification, Number of Grantees Affected | grantees | 4 |  |
Total share-based compensation expense | $ 121 | $ 96 | $ 81
Tax benefit related to share-based compensation | 16 | 12 | 12
Total expense on employee retirement savings plans | 65 | 66 | 60
Share-Based Payment Arrangement, Plan Modification, Incremental Cost | 9 |  |
Performance Share Units |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Total share-based compensation expense | $ 44 | $ 32 | $ 12
Performance Share Units | Maximum |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Target performance goal (as a percent) | 240.00% |  |
Stock Options |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Granted (in shares) | shares | 0 | 0 | 0
2021 LTIP [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Number of shares available for grant | shares | 18,000 |  |
2021 LTIP [Member] | Awards Other than Stock Options |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Number of shares available for grant | shares | 7,000 |  |
2021 LTIP [Member] | Stock Options |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Number of shares available for grant | shares | 18,000 |  |

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