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, 2022	Mar. 31, 2021
Operating income (loss):
Operating income (loss)		$ 29.3	$ 140.8
Interest expense, net of interest income		(11.6)	(11.2)
Miscellaneous other income (expense)		1.1	3.1
Income before income taxes and earnings (losses) of unconsolidated affiliates		18.8	132.7
Operating Segments | Access Equipment
Operating income (loss):
Operating income (loss)	[1]	7.5	80.5
Operating Segments | Defense
Operating income (loss):
Operating income (loss)		19.4	35.5
Operating Segments | Fire & Emergency
Operating income (loss):
Operating income (loss)		22.4	47.4
Operating Segments | Commercial
Operating income (loss):
Operating income (loss)		14.3	18.8
Corporate, Non-segment
Operating income (loss):
Operating income (loss)		$ (34.3)	$ (41.4)

[1] Results for the three months ended March 31, 2021 include a $1.6 million benefit for restructuring and a $3.8 million charge for other costs related to restructuring plans.