Business Segment Information - Schedule of Income (Loss) from Continuing operations by Product Lines and Reportable Segments (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Operating income (loss):
Operating income (loss)		$ 69.4	$ 203.8	$ 98.7	$ 344.6
Interest expense, net of interest income		(11.9)	(11.7)	(23.5)	(22.9)
Miscellaneous other income (expense)		(15.1)	0.4	(14.0)	3.5
Income before income taxes and losses of unconsolidated affiliates		42.4	192.5	61.2	325.2
Operating Segments | Access Equipment
Operating income (loss):
Operating income (loss)	[1]	69.4	113.0	76.9	193.5
Operating Segments | Defense
Operating income (loss):
Operating income (loss)		2.1	59.8	21.5	95.3
Operating Segments | Fire & Emergency
Operating income (loss):
Operating income (loss)		22.8	44.5	45.2	91.9
Operating Segments | Commercial
Operating income (loss):
Operating income (loss)		15.1	29.6	29.4	48.4
Corporate, Non-segment
Operating income (loss):
Operating income (loss)		$ (40.0)	$ (43.1)	$ (74.3)	$ (84.5)

[1] Results for the three and six months ended June 30, 2021 include a $0.2 million charge and $1.4 million benefit for restructuring, respectively. The Company incurred additional charges of $1.1 million and $4.9 million of other costs related to restructuring plans in the three and six months ended June 30, 2021, respectively.