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Goodwill and Other Intangible Assets (Narrative) (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | ---
Mar. 31, 2024 | Sep. 30, 2023 | Mar. 31, 2023 | Dec. 31, 2022 | Sep. 30, 2022 | Mar. 31, 2024 | Mar. 31, 2023 | Jan. 01, 2024 | Jun. 30, 2023
Goodwill and Intangible Assets Disclosure [Abstract] |  |  |  |  |  |  |  |  |
Amortization of intangible assets | $ 64 |  | $ 69 |  |  | $ 191 | $ 211 |  |
Estimated annual amortization of intangible assets - Remainder of Fiscal Year | 69 |  |  |  |  | 69 |  |  |
Estimated annual amortization of intangible assets - Year One | 256 |  |  |  |  | 256 |  |  |
Estimated annual amortization of intangible assets - Year Two | 241 |  |  |  |  | 241 |  |  |
Estimated annual amortization of intangible assets - Year Three | 213 |  |  |  |  | 213 |  |  |
Estimated annual amortization of intangible assets - Year Four | 186 |  |  |  |  | 186 |  |  |
Goodwill [Line Items] |  |  |  |  |  |  |  |  |
Goodwill | 4,788 |  |  |  |  | 4,788 |  |  | $ 4,609
Goodwill impairment |  |  |  |  |  | 671 |  |  |
Global Medical Products and Distribution |  |  |  |  |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |  |  |  |  |
Goodwill | 0 |  |  |  |  | 0 |  |  | $ 677
Goodwill impairment | 90 | $ 581 |  | $ 709 | $ 154 | 671 | $ 863 |  |
OptiFreight Logistics [Member] |  |  |  |  |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |  |  |  |  |
Goodwill | $ 48 |  |  |  |  | $ 48 |  |  |
Global Medical Products and Distribution |  |  |  |  |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |  |  |  |  |
Goodwill |  |  |  |  |  |  |  | $ 90 |
Discount Rate, Fair Value Input | 11.00% |  |  |  |  | 11.00% |  |  |
Terminal Growth Rate, Fair Value Input | 2.00% |  |  |  |  | 2.00% |  |  |
Reporting Unit, Percentage of Fair Value in Excess of Carrying Amount |  |  | 4.00% |  |  |  | 4.00% |  |

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