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Revenue Recognition - Schedule of Deferred Contract Costs (Details) - Other Long -term Assets - USD ($) $ in Millions	Dec. 31, 2021	Sep. 30, 2021
Costs for Anticipated Contracts
Capitalized Contract Cost [Line Items]
Deferred contract related costs	$ 4.9	$ 4.8
Engineering Costs
Capitalized Contract Cost [Line Items]
Deferred contract related costs	60.0	42.3
Factory Setup Costs
Capitalized Contract Cost [Line Items]
Deferred contract related costs	4.1	2.2
Supplier-Owned Tooling
Capitalized Contract Cost [Line Items]
Deferred contract related costs	4.2	1.3
Deferred Contract Related Costs
Capitalized Contract Cost [Line Items]
Deferred contract related costs	$ 73.2	$ 50.6

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+ References

No definition available.

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- Definition

Amount, after accumulated amortization and accumulated impairment loss, of asset recognized from cost incurred to obtain or fulfill contract with customer.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 340
-SubTopic 40
-Section 50
-Paragraph 3
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=123353750&loc=SL49131252-203054

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