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Income Taxes (Narrative) (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Mar. 31, 2020 | Mar. 31, 2019 | Mar. 31, 2020 | Mar. 31, 2019 | Jun. 30, 2019
Income Taxes |  |  |  |  |
Income Tax Expense (Benefit) | $ 127 | $ 74 | $ (237) | $ 342 |
Unrecognized tax benefits | 919 |  | 919 |  | $ 456
Unrecognized tax benefits that would impact effective tax rate | 772 |  | 772 |  | 303
Unrecognized tax benefits, interest and penalties accrued | $ 137 |  | $ 137 |  | 122
Effective Income Tax Rate Reconciliation, Percent | 26.80% | 20.00% | 5.20% | 22.60% |
Minimum |  |  |  |  |
Income Taxes |  |  |  |  |
Estimated range of decrease in unrecognized tax benefits within the next 12 months | $ 0 |  | $ 0 |  |
Maximum |  |  |  |  |
Income Taxes |  |  |  |  |
Estimated range of decrease in unrecognized tax benefits within the next 12 months | $ 350 |  | 350 |  |
Internal Revenue Service (IRS) [Member] | Minimum |  |  |  |  |
Income Taxes |  |  |  |  |
Open Tax Year | 2008 |  |  |  |
Patient Recovery Business |  |  |  |  |
Income Taxes |  |  |  |  |
Indemnification Receivable | $ 18 |  | 18 |  | 22
CareFusion [Member] |  |  |  |  |
Income Taxes |  |  |  |  |
Indemnification Receivable | 173 |  | 173 |  | $ 165
Total Opioid Litigation [Member] |  |  |  |  |
Income Taxes |  |  |  |  |
Estimated Litigation Liability | 5,630 |  | 5,630 |  |
Income Tax Expense (Benefit) |  |  | (487) |  |
Unrecognized tax benefits that would impact effective tax rate | $ 468 |  | $ 468 |  |

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