Derivative Instruments and Hedging Activities Outstanding Commodity Hedge Contracts (Details) - T	12 Months Ended
Sep. 30, 2021	Sep. 30, 2020
Copper [Member]
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount, Mass	2,656	2,497
Aluminum [Member]
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount, Mass	5,159	3,036

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.

Name:	us-gaap_DerivativeLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration