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Goodwill and Other Intangible Assets (Narrative) (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Dec. 31, 2023 | Sep. 30, 2023 | Jun. 30, 2023 | Dec. 31, 2022 | Sep. 30, 2022 | Dec. 31, 2023 | Dec. 31, 2022
Goodwill and Intangible Assets Disclosure [Abstract] |  |  |  |  |  |  |
Amortization of intangible assets | $ 63 |  |  | $ 71 |  | $ 127 | $ 142
Estimated annual amortization of intangible assets - Remainder of Fiscal Year | 127 |  |  |  |  | 127 |
Estimated annual amortization of intangible assets - Year One | 226 |  |  |  |  | 226 |
Estimated annual amortization of intangible assets - Year Two | 206 |  |  |  |  | 206 |
Estimated annual amortization of intangible assets - Year Three | 174 |  |  |  |  | 174 |
Estimated annual amortization of intangible assets - Year Four | 148 |  |  |  |  | 148 |
Goodwill [Line Items] |  |  |  |  |  |  |
Goodwill | 4,024 |  | $ 4,609 |  |  | 4,024 |
Goodwill impairment |  |  |  |  |  | 581 |
Medical |  |  |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |  |  |
Goodwill | $ 1,375 |  | $ 1,960 |  |  | 1,375 |
Goodwill impairment |  |  |  | $ 709 | $ 154 | 581 |
Medical Unit |  |  |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |  |  |
Goodwill impairment |  |  |  |  |  | $ 581 | $ 863
Discount Rate, Fair Value Input |  | 11.00% | 10.00% |  |  |  |
Terminal Growth Rate, Fair Value Input | 2.00% | 2.00% | 2.00% |  |  | 2.00% |
Change in Discount Rate, Fair Value Input |  |  |  |  |  | 1.00% |

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