Quarterly report pursuant to Section 13 or 15(d)

Revenue Recognition Narrative (Details)

v3.20.4
Revenue Recognition Narrative (Details) - USD ($)
$ in Millions
12 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Dec. 31, 2020
Revenue from Contract with Customer [Abstract]      
Receivables from long-term manufacturing contracts $ 138.1   $ 158.9
Liabilities from long-term manufacturing contracts and advances 189.1   $ 214.1
Revenue recognized on long-term manufacturing contracts and advances liabilities $ 80.1 $ 55.3