Business Segment Information - Schedule of Identifiable Assets by Business Segments and by Geographical Segments (Details) - USD ($) $ in Millions		Dec. 31, 2022	Dec. 31, 2021	Sep. 30, 2021
Assets
Assets		$ 7,729.0	$ 6,849.7	$ 7,035.7
Operating Segments
Assets
Assets		7,729.0	6,849.7	7,035.7
Operating Segments | Access Equipment
Assets
Assets		3,483.6	3,192.1	3,076.3
Operating Segments | Access Equipment | Europe, Africa and Middle East
Assets
Assets		562.2	460.3	470.9
Operating Segments | Access Equipment | Rest of the World
Assets
Assets		428.4	383.0	371.4
Operating Segments | Access Equipment | United States
Assets
Assets		2,493.0	2,348.8	2,234.0
Operating Segments | Defense
Assets
Assets		2,066.9	1,266.2	1,196.2
Operating Segments | Defense | Rest of the World
Assets
Assets		6.9	7.2	7.2
Operating Segments | Defense | United States
Assets
Assets		2,060.0	1,259.0	1,189.0
Operating Segments | Fire & Emergency
Assets
Assets		612.2	532.7	558.7
Operating Segments | Fire & Emergency | Rest of the World
Assets
Assets		25.5
Operating Segments | Fire & Emergency | United States
Assets
Assets		586.7	532.7	558.7
Operating Segments | Commercial
Assets
Assets		515.8	460.1	473.7
Operating Segments | Commercial | Rest of the World
Assets
Assets		39.1	45.1	54.8
Operating Segments | Commercial | United States
Assets
Assets		476.7	415.0	418.9
Corporate, Non-segment | United States
Assets
Assets	[1]	$ 1,050.5	$ 1,398.6	$ 1,730.8

[1] Primarily includes cash and short-term investments and the Company’s global headquarters.