Property and Equipment, Net (Details) - USD ($) $ in Millions	Dec. 29, 2019	Dec. 30, 2018
Long-Lived Tangible Asset [Line Items]
Finance lease right-of-use assets	$ 46.3
Total Property and equipment, gross	194.3	$ 156.7
Less: accumulated depreciation and amortization	89.4	68.3
Total property and equipment, net	104.9	88.4
Land
Long-Lived Tangible Asset [Line Items]
Property, plant and equipment, gross	12.2	12.2
Buildings
Long-Lived Tangible Asset [Line Items]
Property, plant and equipment, gross	7.8	7.9
Leasehold improvements
Long-Lived Tangible Asset [Line Items]
Property, plant and equipment, gross	25.5	20.5
Branch equipment
Long-Lived Tangible Asset [Line Items]
Property, plant and equipment, gross	47.9	36.8
Office furniture and fixtures
Long-Lived Tangible Asset [Line Items]
Property, plant and equipment, gross	21.4	19.1
Vehicles
Long-Lived Tangible Asset [Line Items]
Property, plant and equipment, gross	30.2	58.1
Tooling
Long-Lived Tangible Asset [Line Items]
Property, plant and equipment, gross	0.1	0.1
Construction in process
Long-Lived Tangible Asset [Line Items]
Property, plant and equipment, gross	$ 2.9	$ 2.0