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Income Taxes (Narrative) (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Jun. 30, 2024 | Dec. 31, 2023 | Dec. 31, 2022 | Jun. 30, 2024 | Jun. 30, 2023
Income Taxes |  |  |  |  |  |  |
Effective Income Tax Rate Reconciliation, Percent | 27.70% | 5.40% |  | 22.40% | 30.00% |  |
Goodwill impairment |  |  |  | $ 581 |  |  |
Income Tax Expense (Benefit) | $ 136 | $ (7) |  | 104 | $ (8) |  |
Unrecognized tax benefits | 959 |  |  | 959 |  |  | $ 1,000
Unrecognized tax benefits that would impact effective tax rate | 864 |  |  | 864 |  |  | 873
Unrecognized tax benefits, interest and penalties accrued | 52 |  |  | 52 |  |  | 65
Medical Unit |  |  |  |  |  |  |
Income Taxes |  |  |  |  |  |  |
Goodwill impairment |  |  |  | 581 | $ 863 |  |
Medical Unit Goodwill Impairment [Member] | Subsequent Event |  |  |  |  |  |  |
Income Taxes |  |  |  |  |  |  |
Income Tax Expense (Benefit) |  |  | $ 65 |  |  |  |
Forecast [Member] | Medical Unit Goodwill Impairment [Member] |  |  |  |  |  |  |
Income Taxes |  |  |  |  |  |  |
Income Tax Expense (Benefit) |  |  |  |  |  | $ (45) |
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 | 30 |  |  | 30 |  |  |
CareFusion [Member] |  |  |  |  |  |  |
Income Taxes |  |  |  |  |  |  |
Indemnification Receivable | $ 20 |  |  | $ 20 |  |  | $ 82

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