Revenue Recognition - Schedule of Impact Due to Contract Adjustments (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2022	Sep. 30, 2021	Sep. 30, 2020
Disaggregation of Revenue [Abstract]
Net sales	$ (0.1)	$ (33.9)	$ 13.1	$ 31.2
Operating income	(7.7)	(46.2)	19.4	16.2
Net income	$ (5.9)	$ (35.4)	$ 14.9	$ 12.4
Diluted earnings per share	$ (0.09)	$ (0.54)	$ 0.21	$ 0.18