Goodwill and Purchased Intangible Assets - Goodwill Allocated to Reportable Segments (Details) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Goodwill [Line Items]
Gross	$ 2,146.6	$ 2,150.7
Accumulated Impairment	(1,101.7)	(1,101.7)
Net	1,044.9	1,049.0
Access Equipment
Goodwill [Line Items]
Gross	1,805.6	1,809.7
Accumulated Impairment	(932.1)	(932.1)
Net	873.5	877.6
Defense
Goodwill [Line Items]
Gross	44.4	44.4
Net	44.4	44.4
Fire & Emergency
Goodwill [Line Items]
Gross	108.1	108.1
Accumulated Impairment	(2.0)	(2.0)
Net	106.1	106.1
Commercial
Goodwill [Line Items]
Gross	188.5	188.5
Accumulated Impairment	(167.6)	(167.6)
Net	$ 20.9	$ 20.9