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Derivative Financial Instruments - Summary of Amounts Recorded in Consolidated Balance Sheets Footnote (Detail) - USD ($) $ in Millions	Mar. 31, 2021	Sep. 30, 2020
Derivatives, Fair Value [Line Items]
Foreign exchange derivative contracts in asset	$ 6
Foreign exchange derivative contracts in liability	(6)
Interest Rate Swap
Derivatives, Fair Value [Line Items]
Foreign exchange derivative contracts in liability	$ (30)	$ (38)

X

- Definition

Fair value, before effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets elected not to be offset. Excludes assets not subject to a master netting arrangement.

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X

- Definition

Fair value, before effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities elected not to be offset. Excludes liabilities not subject to a master netting arrangement.

+ References

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- 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.

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No definition available.

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