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Supplemental Financial Information - Other Income (Expense), Net (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2023
Equity securities, FV-NI, unrealized gain (loss) | $ (5) | $ 5 | $ (3)
Deferred compensation investment income (expense) | 28 | 57 | 32
Net pension cost (credit) | (84) | (65) | (98)
Foreign currency transaction gain (loss), realized | (47) | (47) | (36)
Advanced Patient Monitoring Services Agreement Income (Loss), net | (14) |  |
Embecta services agreement income, net |  | 26 | 59
Other | (1) | (4) | 0
Other expense, net | (123) | $ (28) | (46)
United States |  |  |
Pension settlement expense | $ 38 |  | $ 57

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