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Income Taxes (Schedule of Deferred Tax Assets and Liabilities) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2016
Income Tax Disclosure [Abstract] |  |  |
Effective Income Tax Rate Reconciliation, Percent | 213.80% | 32.70% | 37.10%
Deferred income tax assets: |  |  |
Receivable basis difference | $ 41 | $ 42 |
Accrued liabilities | 110 | 125 |
Share-based compensation | 40 | 53 |
Loss and tax credit carryforwards | 526 | 378 |
Deferred tax assets related to uncertain tax positions | 30 | 51 |
Other | 101 | 43 |
Total deferred income tax assets | 848 | 692 |
Valuation allowance for deferred income tax assets | (412) | (237) |
Net deferred income tax assets | 436 | 455 |
Deferred income tax liabilities: |  |  |
Inventory basis differences | (1,103) | (1,578) |
Property-related | (176) | (183) |
Goodwill and other intangibles | (934) | (570) |
Total deferred income tax liabilities | (2,213) | (2,331) |
Net deferred income tax liability | $ (1,777) | $ (1,876) |

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