Segment Information - Schedule of Segment Information by Regions (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Services revenue
Services revenue	$ 442.2	$ 381.0	$ 867.5	$ 730.8
Total operating income (loss)	25.3	25.6	44.6	45.7
General and administrative expenses
General and administrative expenses	31.8	26.7	62.4	51.2
Depreciation and amortization
Depreciation and amortization	8.8	6.5	17.2	13.3
Operating Segments | Commercial
Services revenue
Services revenue	147.6	132.9	292.0	264.1
Total operating income (loss)	36.1	34.7	67.3	63.3
General and administrative expenses
General and administrative expenses	9.3	7.8	17.5	13.9
Depreciation and amortization
Depreciation and amortization	3.8	2.8	7.4	5.8
Operating Segments | Aviation
Services revenue
Services revenue	73.7	63.6	145.6	116.8
Total operating income (loss)	9.6	8.5	18.2	16.6
General and administrative expenses
General and administrative expenses	4.0	2.9	7.9	5.6
Depreciation and amortization
Depreciation and amortization	3.1	2.1	5.9	5.0
Segment Reconciling Items
Services revenue
Total operating income (loss)	(20.4)	(17.6)	(40.9)	(34.2)
General and administrative expenses
General and administrative expenses	18.5	16.0	37.0	31.7
Depreciation and amortization
Depreciation and amortization	1.9	1.6	3.9	2.5
Lease Type Contracts
Services revenue
Services revenue	76.3	70.6	144.5	133.2
Lease Type Contracts | Operating Segments | Commercial
Services revenue
Services revenue	72.4	67.1	137.0	126.3
Lease Type Contracts | Operating Segments | Aviation
Services revenue
Services revenue	3.9	3.5	7.5	6.9
Management Type Contracts
Services revenue
Services revenue	145.0	125.9	293.1	247.7
Management Type Contracts | Operating Segments | Commercial
Services revenue
Services revenue	75.2	65.8	155.0	137.8
Management Type Contracts | Operating Segments | Aviation
Services revenue
Services revenue	69.8	60.1	138.1	109.9
Reimbursed Management Type Contract Revenue
Services revenue
Services revenue	$ 220.9	$ 184.5	$ 429.9	$ 349.9