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Business Segment Information - Schedule of Income (Loss) from Continuing Operations by Product Lines and Reportable Segments (Parenthetical) (Details) - USD ($) $ in Millions		3 Months Ended					12 Months Ended
	Oct. 01, 2022	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Dec. 31, 2022	Sep. 30, 2021	Sep. 30, 2020
Segment Reporting Information [Line Items]
Impairment of indefinite-lived intangible assets	$ 5.6
Intangible asset impairment charge							$ 7.7
Accelerated depreciation related to restructuring								$ 3.6	$ 6.9
Pension plan settlement charge							33.6
Gain from insurance proceeds									6.2
Interest Expense
Segment Reporting Information [Line Items]
Gain (loss) on extinguishment of debt									(8.5)
Interest Income
Segment Reporting Information [Line Items]
Interest income from arbitration settlement									3.3
Access Equipment
Segment Reporting Information [Line Items]
Expense to eliminate cumulative translation adjustments upon liquidation of foreign entities			$ 4.6				4.6
Restructuring provision				$ 1.3	$ 2.2	$ 8.0	2.2	3.1	10.4
Accelerated depreciation related to restructuring								3.6	2.8
Access Equipment | Operating Expenses
Segment Reporting Information [Line Items]
Restructuring provision								$ 7.4	4.7
Defense
Segment Reporting Information [Line Items]
Restructuring provision		$ 5.6
Impairment of indefinite-lived intangible assets							5.6
Intangible asset impairment charge		$ 4.3
Commercial
Segment Reporting Information [Line Items]
Restructuring provision									1.5
Impairment of indefinite-lived intangible assets							$ 2.1
Intangible asset impairment charge			$ 2.1
Accelerated depreciation related to restructuring									4.1
Gain on Business Interruption Insurance Recovery									$ 12.3
Gain on Business Interruption Insurance Recovery, Statement of Income or Comprehensive Income [Extensible Enumeration]									Other Nonoperating Income (Expense)
Gain (Loss) on Disposition of Business									$ 3.1

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