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Goodwill and Purchased Intangible Assets - Goodwill Allocated to Reportable Segments (Details) - USD ($) $ in Millions	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2019
Goodwill [Line Items]
Gross	$ 2,153.7	$ 2,119.5
Accumulated Impairment	(1,101.7)	(1,110.0)
Net	1,052.0	1,009.5	$ 995.7
Access Equipment
Goodwill [Line Items]
Gross	1,812.7	1,814.7
Accumulated Impairment	(932.1)	(932.1)
Net	880.6	882.6	868.8
Defense
Goodwill [Line Items]
Gross	44.4
Net	44.4
Fire & Emergency
Goodwill [Line Items]
Gross	108.1	108.1
Accumulated Impairment	(2.0)	(2.0)
Net	106.1	106.1	106.1
Commercial
Goodwill [Line Items]
Gross	188.5	196.7
Accumulated Impairment	(167.6)	(175.9)
Net	$ 20.9	$ 20.8	$ 20.8

X

- Definition

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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+ References

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