Business Segment Information - Schedule of Income (Loss) from Continuing operations by Product Lines and Reportable Segments (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Operating income (loss):
Operating income (loss)	$ 130.8	$ 31.8
Interest expense, net of interest income	(7.2)	(11.6)
Miscellaneous other income	5.8	1.1
Income before income taxes and losses of unconsolidated affiliates	129.4	21.3
Operating Segments | Access
Operating income (loss):
Operating income (loss)	135.0	5.7
Operating Segments | Defense
Operating income (loss):
Operating income (loss)	1.7	19.4
Operating Segments | Vocational
Operating income (loss):
Operating income (loss)	28.1	41.0
Corporate, Non-segment
Operating income (loss):
Operating income (loss)	$ (34.0)	$ (34.3)