Goodwill - Schedule of Changes in Carrying Amounts of Goodwill (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Dec. 31, 2021
Goodwill [Line Items]
Goodwill	$ 586.2	$ 586.1
Accumulated impairment losses	(59.5)	(59.5)
Total	526.7	526.6
Foreign currency translation	0.1
Commercial
Goodwill [Line Items]
Goodwill	377.2	377.1
Total	377.2	377.1
Foreign currency translation	0.1
Aviation
Goodwill [Line Items]
Goodwill	209.0	209.0
Accumulated impairment losses	(59.5)	(59.5)
Total	$ 149.5	$ 149.5