Other Intangible Assets, net - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Finite Lived Intangible Assets [Line Items]
Impairment charge		$ 72.1		$ 75.8
Proprietary Know How | Multi-Period Excess Earnings Method
Finite Lived Intangible Assets [Line Items]
Impairment charge				3.7
Proprietary Know How | Aviation
Finite Lived Intangible Assets [Line Items]
Impairment charge	$ 0.0	$ 72.1	$ 0.0	72.1
Proprietary Know How | Aviation | Multi-Period Excess Earnings Method
Finite Lived Intangible Assets [Line Items]
Impairment charge				$ 3.7