Derivative Instruments and Hedging Activities Outstanding Commodity Hedge Contracts (Details) - T	12 Months Ended
Sep. 30, 2020	Sep. 30, 2019
Copper [Member]
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount, Mass	2,497	3,561
Aluminum [Member]
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount, Mass	3,036	2,967

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.

No definition available.

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