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Segment Information (Segment Profit by Reportable Segment) (Details) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2024 USD ($) | Dec. 31, 2023 USD ($) | Sep. 30, 2023 USD ($) | Mar. 31, 2023 USD ($) | Dec. 31, 2022 USD ($) | Sep. 30, 2022 USD ($) | Jun. 30, 2024 USD ($) segment | Jun. 30, 2023 USD ($) | Jun. 30, 2022 USD ($)
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |  |  |  |  |  |
Operating earnings/(loss) | $ 369 | $ 505 | $ (32) | $ 604 | $ (86) | $ 123 | $ 1,243 | $ 752 | $ (607)
Number of Reportable Segments | segment |  |  |  |  |  |  | 2 |  |
Operating Segments |  |  |  |  |  |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |  |  |  |  |  |
Operating earnings/(loss) |  |  |  |  |  |  | $ 2,530 | 2,130 | 1,969
Operating Segments | Pharmaceutical and Specialty Solutions |  |  |  |  |  |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |  |  |  |  |  |
Operating earnings/(loss) |  |  |  |  |  |  | 2,015 | 1,881 | 1,643
Operating Segments | GMPD |  |  |  |  |  |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |  |  |  |  |  |
Operating earnings/(loss) |  |  |  |  |  |  | 92 | (147) | (64)
Operating Segments | Other Operating Segment |  |  |  |  |  |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |  |  |  |  |  |
Operating earnings/(loss) |  |  |  |  |  |  | 423 | 396 | 390
Total operating earnings/(loss) |  |  |  |  |  |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |  |  |  |  |  |
Operating earnings/(loss) |  |  |  |  |  |  | $ (1,287) | $ (1,378) | $ (2,576)

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