Quarterly report pursuant to Section 13 or 15(d)

Revenue Recognition Narrative (Details)

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Revenue Recognition Narrative (Details) - USD ($)
$ in Millions
3 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Sep. 30, 2019
Revenue from Contract with Customer [Abstract]      
Receivables from long-term manufacturing contracts $ 205.9   $ 181.1
Liabilities from long-term manufacturing contracts and advances 183.1   $ 158.2
Revenue recognized on long-term manufacturing contracts and advances liabilities $ 55.3 $ 78.0