Revenue Recognition Narrative (Details) - USD ($) $ in Millions |
6 Months Ended | ||
|---|---|---|---|
Mar. 31, 2020 |
Mar. 31, 2019 |
Sep. 30, 2019 |
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| Revenue from Contract with Customer [Abstract] | |||
| Receivables from long-term manufacturing contracts | $ 187.3 | $ 181.1 | |
| Liabilities from long-term manufacturing contracts and advances | 176.6 | $ 158.2 | |
| Revenue recognized on long-term manufacturing contracts and advances liabilities | $ 87.8 | $ 107.0 | |
| X | ||||||||||
- Definition Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount of revenue recognized that was previously included in balance of obligation to transfer good or service to customer for which consideration from customer has been received or is due. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount to be collected within one year of the balance sheet date (or one operating cycle, if longer) from customers in accordance with the contractual provisions of long-term contracts or programs including amounts billed and unbilled as of the balance sheet date. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- References No definition available.
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