Goodwill - Schedule of Changes in Carrying Amounts of Goodwill (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
Goodwill [Line Items]
Goodwill	$ 602.8	$ 602.7
Accumulated impairment losses	(59.5)	(59.5)
Total	543.3	543.2
Foreign currency translation	0.1
Commercial
Goodwill [Line Items]
Goodwill	387.0	387.0
Total	387.0	387.0
Aviation
Goodwill [Line Items]
Goodwill	215.8	215.7
Accumulated impairment losses	(59.5)	(59.5)
Total	156.3	$ 156.2
Foreign currency translation	$ 0.1