Property, plant and equipment, net - Schedule of Property and Equipment (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 683.3	$ 684.9
Less – accumulated depreciation	(18.3)	(16.1)
Total property, plant and equipment, net	665.0	668.8
Plant equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	55.8	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	13.6	13.5
Construction in progress | Rochester Hub
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	549.2	547.2
Construction in progress | Spokes Network
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	31.1	34.7
Construction in progress | Buildings
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 28.8	$ 29.5