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Income Taxes (Narrative) (Details) - USD ($) $ in Millions |  | 12 Months Ended |
--- | --- | --- | ---
Jun. 28, 2018 | Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2016 | Jun. 30, 2015
Income Taxes |  |  |  |  |
Effective Income Tax Rate Reconciliation, Percent |  | 213.80% | 32.70% | 37.10% |
Provision at Federal statutory rate |  | 28.10% | 35.00% | 35.00% |
Provisional net tax benefit related to Tax Act |  | $ 977 |  |  |
Undistributed earnings from non-U.S. subsidiaries |  | 110 |  |  |
Provisional Tax Expense on Repatriated Undistributed Earnings of Foreign Subsidiaries |  | 41 |  |  |
Federal | $ 163 | 1,003 | $ (258) | $ (96) |
Deferred Tax Assets, Valuation Allowance | $ 72 |  |  |  |
Deferred tax assets on tax credit carryforwards |  | 526 | 378 |  |
Valuation allowance on operating loss carryforwards |  | 379 |  |  |
Unrecognized tax benefits that would impact effective tax rate |  | 262 | 268 | 355 |
Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions |  | 141 | 23 | 42 |
Unrecognized tax benefits |  | 423 | 417 | 527 | $ 542
Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities |  | 99 | 154 | 30 |
Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations |  | 11 | 0 | 1 |
Unrecognized tax benefits, interest and penalties accrued |  | 110 | 99 | 145 |
Unrecognized tax benefits, interest and penalties |  | 8 | 12 | $ 9 |
Amount CareFusion is liable under tax matters agreement in the event amount must be paid to the taxing authority |  | 151 | $ 142 |  |
Minimum |  |  |  |  |
Income Taxes |  |  |  |  |
Estimated range of decrease in unrecognized tax benefits within the next 12 months |  | 0 |  |  |
Maximum |  |  |  |  |
Income Taxes |  |  |  |  |
Estimated range of decrease in unrecognized tax benefits within the next 12 months |  | 35 |  |  |
Federal |  |  |  |  |
Income Taxes |  |  |  |  |
Tax credit carryforwards |  | 794 |  |  |
State and Local |  |  |  |  |
Income Taxes |  |  |  |  |
Tax credit carryforwards |  | 2,026 |  |  |
Foreign |  |  |  |  |
Income Taxes |  |  |  |  |
Tax credit carryforwards |  | 1,149 |  |  |
Patient Recovery Business [Member] |  |  |  |  |
Income Taxes |  |  |  |  |
Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions |  | 110 |  |  |
Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities |  | 81 |  |  |
Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations |  | 11 |  |  |
Business Combination, Indemnification Assets, Amount as of Acquisition Date |  | $ 21 |  |  |

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