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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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