Revenue Recognition - Disaggregation of Revenue (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Disaggregation Of Revenue [Line Items]
Net sales	$ 2,066.0	$ 2,208.8	$ 4,011.7	$ 4,097.8
Operating Segments
Disaggregation Of Revenue [Line Items]
Net sales	2,066.0		4,011.7
Intersegment Eliminations
Disaggregation Of Revenue [Line Items]
Net sales	(2.2)	(6.5)	(4.5)	(12.9)
Transferred at Point in Time
Disaggregation Of Revenue [Line Items]
Net sales	1,404.5	1,364.3	2,711.1	2,522.7
Transferred at Point in Time | Intersegment Eliminations
Disaggregation Of Revenue [Line Items]
Net sales	(2.2)	(6.4)	(4.5)	(13.5)
Transferred over Time
Disaggregation Of Revenue [Line Items]
Net sales	661.5	844.5	1,300.6	1,575.1
Transferred over Time | Intersegment Eliminations
Disaggregation Of Revenue [Line Items]
Net sales		(0.1)		0.6
Access Equipment
Disaggregation Of Revenue [Line Items]
Net sales	977.0	923.1	1,860.0	1,659.7
Access Equipment | Operating Segments
Disaggregation Of Revenue [Line Items]
Net sales	977.1	924.3	1,860.2	1,662.5
Access Equipment | Intersegment Eliminations
Disaggregation Of Revenue [Line Items]
Net sales	0.1	1.2	0.2	2.8
Access Equipment | Transferred at Point in Time | Operating Segments
Disaggregation Of Revenue [Line Items]
Net sales	965.4	907.1	1,835.3	1,628.2
Access Equipment | Transferred over Time | Operating Segments
Disaggregation Of Revenue [Line Items]
Net sales	11.7	17.2	24.9	34.3
Defense
Disaggregation Of Revenue [Line Items]
Net sales	538.9	709.9	1,074.1	1,324.2
Defense | Operating Segments
Disaggregation Of Revenue [Line Items]
Net sales	539.3	710.4	1,074.9	1,325.1
Defense | Intersegment Eliminations
Disaggregation Of Revenue [Line Items]
Net sales	0.4	0.5	0.8	0.9
Defense | Transferred at Point in Time | Operating Segments
Disaggregation Of Revenue [Line Items]
Net sales	2.2	10.1	4.3	20.4
Defense | Transferred over Time | Operating Segments
Disaggregation Of Revenue [Line Items]
Net sales	537.1	700.3	1,070.6	1,304.7
Fire & Emergency
Disaggregation Of Revenue [Line Items]
Net sales	275.7	298.4	562.2	607.1
Fire & Emergency | Operating Segments
Disaggregation Of Revenue [Line Items]
Net sales	276.5	302.5	564.4	615.0
Fire & Emergency | Intersegment Eliminations
Disaggregation Of Revenue [Line Items]
Net sales	0.8	4.1	2.2	7.9
Fire & Emergency | Transferred at Point in Time | Operating Segments
Disaggregation Of Revenue [Line Items]
Net sales	271.4	297.8	554.0	605.4
Fire & Emergency | Transferred over Time | Operating Segments
Disaggregation Of Revenue [Line Items]
Net sales	5.1	4.7	10.4	9.6
Commercial
Disaggregation Of Revenue [Line Items]
Net sales	274.4	277.4	515.4	506.2
Commercial | Operating Segments
Disaggregation Of Revenue [Line Items]
Net sales	275.3	278.1	516.7	508.1
Commercial | Intersegment Eliminations
Disaggregation Of Revenue [Line Items]
Net sales	0.9	0.7	1.3	1.9
Commercial | Transferred at Point in Time | Operating Segments
Disaggregation Of Revenue [Line Items]
Net sales	167.7	155.7	322.0	282.2
Commercial | Transferred over Time | Operating Segments
Disaggregation Of Revenue [Line Items]
Net sales	$ 107.6	$ 122.4	$ 194.7	$ 225.9