Business Segment Information - Schedule of Identifiable Assets by Business Segments and by Geographical Segments (Details) - USD ($) $ in Millions		Sep. 30, 2020	Sep. 30, 2019
Assets
Assets		$ 5,815.9	$ 5,566.3
Operating Segments | Access Equipment
Assets
Assets		2,893.8	2,973.2
Operating Segments | Access Equipment | United States
Assets
Assets		2,151.4	2,317.2
Operating Segments | Access Equipment | Europe, Africa and Middle East
Assets
Assets		383.4	403.4
Operating Segments | Access Equipment | Rest of the World
Assets
Assets	[1]	359.0	252.6
Operating Segments | Defense
Assets
Assets		1,062.7	889.7
Operating Segments | Defense | United States
Assets
Assets		1,055.5	883.0
Operating Segments | Defense | Rest of the World
Assets
Assets		7.2	6.7
Operating Segments | Fire & Emergency | United States
Assets
Assets		586.8	587.9
Operating Segments | Commercial
Assets
Assets		418.2	432.5
Operating Segments | Commercial | United States
Assets
Assets		370.7	383.6
Operating Segments | Commercial | Rest of the World
Assets
Assets		47.5	48.9
Corporate, Non-segment
Assets
Assets		854.4	683.0
Corporate, Non-segment | United States
Assets
Assets	[2]	$ 854.4	597.6
Corporate, Non-segment | Rest of the World
Assets
Assets	[1]		$ 85.4

[1] Control of a shared manufacturing facility in Mexico transferred to the Access Equipment segment effective October 1, 2019.

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