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Financial Instruments and Fair Value Measurements - Additional Information (Detail) - USD ($) $ in Millions | 12 Months Ended
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Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2021
Cost of products sold |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Asset Impairment Charges |  |  | $ 40
Minimum |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Maturity period of short-term investments at the time of purchase | 3 months |  |
Maximum |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Maturity period of short-term investments at the time of purchase | 1 year |  |
Life Sciences | Cost of products sold |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Asset Impairment Charges |  | $ 11 |
Medical | Cost of products sold |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Asset Impairment Charges |  | 54 |
Medical | Acquisition-related integration and restructuring expense |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Asset Impairment Charges |  | $ 19 |

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