Derivative Instruments and Hedging Activities - Schedule of Notional Amounts of Outstanding Derivative Positions (Detail) - USD ($) $ in Millions	Dec. 31, 2025	Sep. 30, 2025
Foreign Exchange Contracts
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional amount of derivative	$ 2,906	$ 5,710
Foreign Exchange Contracts \| Cash flow hedges
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional amount of derivative	898	1,170
Currency Swap \| Net investment hedges
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional amount of derivative	1,054	1,054
Interest Rate Swaps \| Fair value hedges
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional amount of derivative	700	700
Foreign Currency-Denominated Debt \| Net investment hedges
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional amount of derivative	$ 2,644	$ 2,630

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References + Details

BECTON DICKINSON & CO 10-Q