Quarterly report pursuant to Section 13 or 15(d)

Revenue Recognition - Narrative (Details)

v3.22.0.1
Revenue Recognition - Narrative (Details) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Sep. 30, 2021
Disaggregation of Revenue [Line Items]      
Deferred revenue, revenue recognized $ 41.2 $ 14.0  
Cumulative catch-up adjustment to revenue from change in estimates $ (4.7) $ 10.2  
Cumulative catch-up adjustment to diluted earnings per share from change in estimates (in dollars per share) $ 0.05 $ 0.12  
Unbilled receivables      
Disaggregation of Revenue [Line Items]      
Unbilled contracts receivable $ 12.5   $ 10.4