Goodwill - Schedule of Changes in Carrying Amounts of Goodwill (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Goodwill [Line Items]
Goodwill	$ 586,100,000	$ 586,100,000	$ 586,000,000.0
Accumulated impairment losses	(59,500,000)	(59,500,000)
Total	526,600,000	526,600,000	586,000,000.0
Impairment		(59,500,000)	0
Foreign currency translation		100,000
Commercial
Goodwill [Line Items]
Goodwill	377,100,000	377,100,000	377,000,000.0
Total	377,100,000	377,100,000	377,000,000.0
Foreign currency translation		100,000
Aviation
Goodwill [Line Items]
Goodwill	209,000,000.0	209,000,000.0	209,000,000.0
Accumulated impairment losses	(59,500,000)	(59,500,000)
Total	149,500,000	149,500,000	209,000,000.0
Impairment	$ 0	(59,500,000)	$ 0
Foreign currency translation		$ 0