Quarterly report pursuant to Section 13 or 15(d)

Revenue Recognition - Narrative (Details)

v3.23.1
Revenue Recognition - Narrative (Details) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended 6 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Mar. 31, 2023
Mar. 31, 2022
Sep. 30, 2022
Disaggregation of Revenue [Line Items]          
Deferred revenue, revenue recognized $ 34.8 $ 20.6 $ 85.9 $ 61.8  
Cumulative catch-up adjustment to revenue from change in estimates $ (6.5) $ (1.4) $ (6.1) $ (4.2)  
Cumulative catch-up adjustment to diluted earnings per share from change in estimates (in dollars per share) $ (0.08) $ (0.02) $ (0.07) $ (0.05)  
Unbilled receivables          
Disaggregation of Revenue [Line Items]          
Unbilled contracts receivable $ 11.7   $ 11.7   $ 13.1