Unaudited Quarterly Results - Schedule of Unaudited Quarterly Results (Parenthetical) (Details) - USD ($) $ in Millions	3 Months Ended							12 Months Ended
	Dec. 31, 2022	Sep. 30, 2022	Mar. 31, 2022	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Dec. 31, 2022	Sep. 30, 2021	Sep. 30, 2020
Effect of Fourth Quarter Events [Line Items]
Pension settlement charge	$ 33.6
Restructuring charge, net of tax	25.7
Intangible asset impairment charge								$ 7.7
Income tax expense (benefit) related to taxes on income in prior periods			$ 18.1
Tax benefit for revaluation of deferred tax liabilities				$ 11.7
Tax benefit for net operating loss carrybacks				$ 5.4	$ 69.9
Valuation allowance on foreign net deferred tax assets benefits (expense)									$ 11.7
Defense
Effect of Fourth Quarter Events [Line Items]
Restructuring charges	5.6
Intangible asset impairment charge	$ 4.3
Access Equipment
Effect of Fourth Quarter Events [Line Items]
Restructuring charges					1.3	$ 2.2	$ 8.0	2.2	$ 3.1	$ 10.4
Restructuring charge, net of tax					$ 1.4	$ 2.5	$ 7.8
Expense to eliminate cumulative translation adjustments upon liquidation of foreign entities		$ 4.6						$ 4.6
Commercial
Effect of Fourth Quarter Events [Line Items]
Restructuring charges										$ 1.5
Intangible asset impairment charge		$ 2.1