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, 2023	Dec. 31, 2022	Sep. 30, 2021
Disaggregation of Revenue [Abstract]
Net sales	$ (0.1)	$ 18.8	$ (33.9)	$ 13.1
Operating income	(7.7)	2.9	(46.2)	19.4
Net income	$ (5.9)	$ 2.2	$ (35.4)	$ 14.9
Diluted earnings per share	$ (0.09)	$ 0.03	$ (0.54)	$ 0.21