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Income Taxes (Narrative) (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Jun. 30, 2023 | Dec. 31, 2022 | Sep. 30, 2022 | Jun. 30, 2023 | Jun. 30, 2022 | Jun. 30, 2021 | Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2016 | Jun. 30, 2015 | Jun. 30, 2020
Income Taxes |  |  |  |  |  |  |  |  |  |  |
Effective Income Tax Rate Reconciliation, Percent |  |  |  | 58.90% | (21.20%) | (89.70%) |  |  |  |  |
Goodwill, Impairment Loss |  |  |  | $ 1,231 | $ 2,084 |  |  |  |  |  |
Income Tax Expense (Benefit) |  |  |  | $ 376 | $ 163 | $ (289) |  |  |  |  |
Provision at Federal statutory rate |  |  |  | 21.00% | 21.00% | 21.00% | 28.00% | 35.00% | 35.00% | 35.00% |
Deferred income taxes and other liabilities | $ 8,653 |  |  | $ 8,653 | $ 9,299 |  |  |  |  |  |
Unrecognized tax benefits that would impact effective tax rate | 873 |  |  | 873 | 858 | $ 849 |  |  |  |  |
Effective Tax Rate Impact From Certain Foreign Jurisdictions |  |  |  | 27 |  |  |  |  |  |  |
Undistributed Earnings of Foreign Subsidiaries | 976 |  |  | 976 |  |  |  |  |  |  |
Deferred tax assets on tax credit carryforwards | (671) |  |  | (671) | (778) |  |  |  |  |  |
Valuation allowance on operating loss carryforwards | (403) |  |  | (403) |  |  |  |  |  |  |
Unrecognized tax benefits | 1,010 |  |  | 1,010 | 943 | 932 |  |  |  |  | $ 998
Unrecognized tax benefits, interest and penalties accrued | 65 |  |  | 65 | 48 | 49 |  |  |  |  |
Medical |  |  |  |  |  |  |  |  |  |  |
Income Taxes |  |  |  |  |  |  |  |  |  |  |
Goodwill, Impairment Loss |  |  |  | 1,231 | 2,084 |  |  |  |  |  |
Medical Unit |  |  |  |  |  |  |  |  |  |  |
Income Taxes |  |  |  |  |  |  |  |  |  |  |
Goodwill, Impairment Loss | 368 | $ 709 | $ 154 | 1,200 | 2,100 |  |  |  |  |  |
Medical Unit | Medical |  |  |  |  |  |  |  |  |  |  |
Income Taxes |  |  |  |  |  |  |  |  |  |  |
Goodwill, Impairment Loss |  |  |  | (1,200) | (2,100) |  |  |  |  |  |
Net Operating Loss Carryback |  |  |  |  |  |  |  |  |  |  |
Income Taxes |  |  |  |  |  |  |  |  |  |  |
Income Tax Expense (Benefit) |  |  |  |  |  | (424) |  |  |  |  |
Income Taxes Receivable |  |  |  |  |  | 974 |  |  |  |  |
Proceeds from Income Tax Refunds |  |  |  |  | 966 |  |  |  |  |  |
Deferred income taxes and other liabilities |  |  |  |  |  | 700 |  |  |  |  |
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 | 50 |  |  | 50 |  |  |  |  |  |  |
Federal |  |  |  |  |  |  |  |  |  |  |
Income Taxes |  |  |  |  |  |  |  |  |  |  |
Tax credit carryforwards | 505 |  |  | 505 |  |  |  |  |  |  |
State and Local |  |  |  |  |  |  |  |  |  |  |
Income Taxes |  |  |  |  |  |  |  |  |  |  |
Tax credit carryforwards | 3,400 |  |  | 3,400 |  |  |  |  |  |  |
Foreign |  |  |  |  |  |  |  |  |  |  |
Income Taxes |  |  |  |  |  |  |  |  |  |  |
Tax credit carryforwards | 2,100 |  |  | 2,100 |  |  |  |  |  |  |
CareFusion [Member] |  |  |  |  |  |  |  |  |  |  |
Income Taxes |  |  |  |  |  |  |  |  |  |  |
Amount CareFusion is liable under tax matters agreement in the event amount must be paid to the taxing authority | $ 82 |  |  | 82 | 75 |  |  |  |  |  |
Total Opioid Litigation [Member] |  |  |  |  |  |  |  |  |  |  |
Income Taxes |  |  |  |  |  |  |  |  |  |  |
Income Tax Expense (Benefit) |  |  |  |  |  | (228) |  |  |  |  |
Litigation Settlement, Expense |  |  |  |  |  | 1,170 |  |  |  |  |
Unrecognized tax benefits that would impact effective tax rate |  |  |  |  |  | $ 219 |  |  |  |  |
Medical Unit Goodwill Impairment [Member] |  |  |  |  |  |  |  |  |  |  |
Income Taxes |  |  |  |  |  |  |  |  |  |  |
Income Tax Expense (Benefit) |  |  |  | $ (82) | $ (150) |  |  |  |  |  |

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