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Income Taxes (Schedule of Deferred Tax Assets and Liabilities) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2017
Income Tax Disclosure [Abstract] |  |  |
Effective Income Tax Rate Reconciliation, Percent | 22.10% | 213.80% | 32.70%
Deferred income tax assets: |  |  |
Receivable basis difference | $ 35 | $ 41 |
Accrued liabilities | 133 | 110 |
Share-based compensation | 39 | 40 |
Loss and tax credit carryforwards | 621 | 526 |
Deferred tax assets related to uncertain tax positions | 30 | 30 |
Other | 6 | 101 |
Total deferred income tax assets | 864 | 848 |
Valuation allowance for deferred income tax assets | (542) | (412) |
Net deferred income tax assets | 322 | 436 |
Deferred income tax liabilities: |  |  |
Inventory basis differences | (1,056) | (1,103) |
Property-related | (171) | (176) |
Goodwill and other intangibles | (808) | (934) |
Total deferred income tax liabilities | (2,035) | (2,213) |
Net deferred income tax liability | $ (1,713) | $ (1,777) |

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