Revenue Recognition - Disaggregation of Revenue (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Disaggregation Of Revenue [Line Items]
Net sales	$ 1,945.7	$ 1,889.0
Intersegment Eliminations
Disaggregation Of Revenue [Line Items]
Net sales	(2.3)	(6.4)
Transferred at Point in Time
Disaggregation Of Revenue [Line Items]
Net sales	1,306.6	1,158.5
Transferred at Point in Time | Intersegment Eliminations
Disaggregation Of Revenue [Line Items]
Net sales	(2.3)	(7.0)
Transferred over Time
Disaggregation Of Revenue [Line Items]
Net sales	639.1	730.5
Transferred over Time | Intersegment Eliminations
Disaggregation Of Revenue [Line Items]
Net sales		0.6
Access Equipment
Disaggregation Of Revenue [Line Items]
Net sales	883.0	736.6
Access Equipment | Operating Segments
Disaggregation Of Revenue [Line Items]
Net sales	883.1	738.2
Access Equipment | Intersegment Eliminations
Disaggregation Of Revenue [Line Items]
Net sales	0.1	1.6
Access Equipment | Transferred at Point in Time | Operating Segments
Disaggregation Of Revenue [Line Items]
Net sales	869.9	721.1
Access Equipment | Transferred over Time | Operating Segments
Disaggregation Of Revenue [Line Items]
Net sales	13.2	17.1
Defense
Disaggregation Of Revenue [Line Items]
Net sales	535.2	614.3
Defense | Operating Segments
Disaggregation Of Revenue [Line Items]
Net sales	535.6	614.7
Defense | Intersegment Eliminations
Disaggregation Of Revenue [Line Items]
Net sales	0.4	0.4
Defense | Transferred at Point in Time | Operating Segments
Disaggregation Of Revenue [Line Items]
Net sales	2.1	10.3
Defense | Transferred over Time | Operating Segments
Disaggregation Of Revenue [Line Items]
Net sales	533.5	604.4
Fire & Emergency
Disaggregation Of Revenue [Line Items]
Net sales	286.5	308.7
Fire & Emergency | Operating Segments
Disaggregation Of Revenue [Line Items]
Net sales	287.9	312.5
Fire & Emergency | Intersegment Eliminations
Disaggregation Of Revenue [Line Items]
Net sales	1.4	3.8
Fire & Emergency | Transferred at Point in Time | Operating Segments
Disaggregation Of Revenue [Line Items]
Net sales	282.6	307.6
Fire & Emergency | Transferred over Time | Operating Segments
Disaggregation Of Revenue [Line Items]
Net sales	5.3	4.9
Commercial
Disaggregation Of Revenue [Line Items]
Net sales	241.0	228.8
Commercial | Operating Segments
Disaggregation Of Revenue [Line Items]
Net sales	241.4	230.0
Commercial | Intersegment Eliminations
Disaggregation Of Revenue [Line Items]
Net sales	0.4	1.2
Commercial | Transferred at Point in Time | Operating Segments
Disaggregation Of Revenue [Line Items]
Net sales	154.3	126.5
Commercial | Transferred over Time | Operating Segments
Disaggregation Of Revenue [Line Items]
Net sales	$ 87.1	$ 103.5