Revenue Recognition - Disaggregation of Revenue (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Disaggregation Of Revenue [Line Items]
Net sales	$ 2,066.7	$ 2,063.0	$ 6,078.4	$ 6,160.8
Operating Segments
Disaggregation Of Revenue [Line Items]
Net sales	2,066.7	2,063.0	6,078.4	6,160.8
Intersegment Eliminations
Disaggregation Of Revenue [Line Items]
Net sales	(1.6)	(4.6)	(6.1)	(17.5)
Transferred at Point in Time
Disaggregation Of Revenue [Line Items]
Net sales	1,440.9	1,297.0	4,152.0	3,819.7
Transferred at Point in Time | Intersegment Eliminations
Disaggregation Of Revenue [Line Items]
Net sales	(1.6)	(4.5)	(6.1)	(18.0)
Transferred over Time
Disaggregation Of Revenue [Line Items]
Net sales	625.8	766.0	1,926.4	2,341.1
Transferred over Time | Intersegment Eliminations
Disaggregation Of Revenue [Line Items]
Net sales		(0.1)		0.5
Access Equipment
Disaggregation Of Revenue [Line Items]
Net sales	1,037.9	845.2	2,897.9	2,504.9
Access Equipment | Operating Segments
Disaggregation Of Revenue [Line Items]
Net sales	1,037.9	845.9	2,898.1	2,508.4
Access Equipment | Intersegment Eliminations
Disaggregation Of Revenue [Line Items]
Net sales		0.7	0.2	3.5
Access Equipment | Transferred at Point in Time | Operating Segments
Disaggregation Of Revenue [Line Items]
Net sales	1,026.4	830.6	2,861.7	2,458.8
Access Equipment | Transferred over Time | Operating Segments
Disaggregation Of Revenue [Line Items]
Net sales	11.5	15.3	36.4	49.6
Defense
Disaggregation Of Revenue [Line Items]
Net sales	518.5	649.9	1,592.6	1,974.1
Defense | Operating Segments
Disaggregation Of Revenue [Line Items]
Net sales	518.7	650.2	1,593.6	1,975.3
Defense | Intersegment Eliminations
Disaggregation Of Revenue [Line Items]
Net sales	0.2	0.3	1.0	1.2
Defense | Transferred at Point in Time | Operating Segments
Disaggregation Of Revenue [Line Items]
Net sales	4.3	3.5	8.6	23.9
Defense | Transferred over Time | Operating Segments
Disaggregation Of Revenue [Line Items]
Net sales	514.4	646.7	1,585.0	1,951.4
Fire & Emergency
Disaggregation Of Revenue [Line Items]
Net sales	246.5	334.7	808.7	941.8
Fire & Emergency | Operating Segments
Disaggregation Of Revenue [Line Items]
Net sales	247.2	337.7	811.6	952.7
Fire & Emergency | Intersegment Eliminations
Disaggregation Of Revenue [Line Items]
Net sales	0.7	3.0	2.9	10.9
Fire & Emergency | Transferred at Point in Time | Operating Segments
Disaggregation Of Revenue [Line Items]
Net sales	242.7	331.6	796.7	937.0
Fire & Emergency | Transferred over Time | Operating Segments
Disaggregation Of Revenue [Line Items]
Net sales	4.5	6.1	14.9	15.7
Commercial
Disaggregation Of Revenue [Line Items]
Net sales	263.8	233.2	779.2	739.4
Commercial | Operating Segments
Disaggregation Of Revenue [Line Items]
Net sales	264.5	233.8	781.2	741.9
Commercial | Intersegment Eliminations
Disaggregation Of Revenue [Line Items]
Net sales	0.7	0.6	2.0	2.5
Commercial | Transferred at Point in Time | Operating Segments
Disaggregation Of Revenue [Line Items]
Net sales	169.1	135.8	491.1	418.0
Commercial | Transferred over Time | Operating Segments
Disaggregation Of Revenue [Line Items]
Net sales	$ 95.4	$ 98.0	$ 290.1	$ 323.9