Property, plant and equipment, net - Schedule of Property and Equipment (Details) - USD ($) $ in Millions	Jun. 30, 2024	Dec. 31, 2023
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 718.7	$ 684.9
Less – accumulated depreciation	(20.9)	(16.1)
Total property, plant and equipment, net	697.8	668.8
Plant equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	53.3	55.3
Computer equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	4.6	4.5
Vehicles
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	0.2	0.2
Leasehold improvement
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	13.0	13.5
Construction in progress | Rochester Hub
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	579.5	547.2
Construction in progress | Spokes Network
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	38.5	34.7
Construction in progress | Buildings
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 29.6	$ 29.5