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Income Taxes (Narrative) (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2018 | Dec. 31, 2017 | Jun. 30, 2018
Income Taxes |  |  |  |  |
Remeasurement Deferred Tax Assets and Liabilities expense (benefit) |  | $ (935) |  | $ (935) |
Foreign income, transition tax |  | $ 41 |  | $ 41 |
Unrecognized tax benefits | $ 496 |  | $ 496 |  | $ 423
Unrecognized tax benefits that would impact effective tax rate | 333 |  | 333 |  | 262
Unrecognized tax benefits, interest and penalties accrued | $ 116 |  | $ 116 |  | 110
Effective Income Tax Rate Reconciliation, Percent | 31.00% | (231.90%) | 23.50% | (136.60%) |
Net Discrete Tax Benefit |  |  | $ 38 |  |
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 | 35 |  | 35 |  |
Patient Recovery Business |  |  |  |  |
Income Taxes |  |  |  |  |
Indemnification Receivable | 23 |  | 23 |  | 21
Disposal Group, Held-for-sale, Not Discontinued Operations [Member] |  |  |  |  |
Income Taxes |  |  |  |  |
Disposal Group, Including Discontinued Operation, Provisional Tax Expense |  | $ 57 |  | $ 57 |
CareFusion [Member] |  |  |  |  |
Income Taxes |  |  |  |  |
Indemnification Receivable | $ 156 |  | $ 156 |  | $ 151

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