Other Intangible Assets, net - Narrative (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2020	Jun. 30, 2021	Dec. 31, 2020
Finite Lived Intangible Assets [Line Items]
Carrying amount			$ 58.8	$ 63.1
Impairment of intangible assets	$ 3.7	$ 3.7
Proprietary Know How
Finite Lived Intangible Assets [Line Items]
Carrying amount			$ 2.9	$ 3.4
Proprietary Know How | Aviation
Finite Lived Intangible Assets [Line Items]
Impairment of intangible assets	3.7	3.7
Proprietary Know How | Level 3
Finite Lived Intangible Assets [Line Items]
Carrying amount	7.6	7.6
Fair value	$ 3.9	$ 3.9