Segment Information - Schedule of Segment Information by Regions (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Services revenue
Services revenue	$ 460.7	$ 404.4	$ 1,328.2	$ 1,135.2
Total operating income (loss)	21.0	23.8	65.6	69.5
General and administrative expenses
General and administrative expenses	37.6	27.2	100.0	78.4
Depreciation and amortization
Depreciation and amortization	9.0	7.2	26.2	20.5
Operating Segments | Commercial
Services revenue
Services revenue	146.5	136.8	438.5	400.9
Total operating income (loss)	35.7	32.4	103.0	95.7
General and administrative expenses
General and administrative expenses	9.8	7.2	27.3	21.1
Depreciation and amortization
Depreciation and amortization	3.8	3.4	11.2	9.2
Operating Segments | Aviation
Services revenue
Services revenue	81.9	70.3	227.5	187.1
Total operating income (loss)	10.6	9.7	28.8	26.3
General and administrative expenses
General and administrative expenses	4.8	3.1	12.7	8.7
Depreciation and amortization
Depreciation and amortization	2.9	2.4	8.8	7.4
Segment Reconciling Items
Services revenue
Total operating income (loss)	(25.3)	(18.3)	(66.2)	(52.5)
General and administrative expenses
General and administrative expenses	23.0	16.9	60.0	48.6
Depreciation and amortization
Depreciation and amortization	2.3	1.4	6.2	3.9
Lease Type Contracts
Services revenue
Services revenue	74.9	72.2	219.4	205.4
Lease Type Contracts | Operating Segments | Commercial
Services revenue
Services revenue	70.9	68.6	207.9	194.9
Lease Type Contracts | Operating Segments | Aviation
Services revenue
Services revenue	4.0	3.6	11.5	10.5
Management Type Contracts
Services revenue
Services revenue	153.5	134.9	446.6	382.6
Management Type Contracts | Operating Segments | Commercial
Services revenue
Services revenue	75.6	68.2	230.6	206.0
Management Type Contracts | Operating Segments | Aviation
Services revenue
Services revenue	77.9	66.7	216.0	176.6
Reimbursed Management Type Contract Revenue
Services revenue
Services revenue	$ 232.3	$ 197.3	$ 662.2	$ 547.2