Leases - Lease Cost (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Jun. 29, 2019	Jun. 29, 2019
Leases [Abstract]
Amortization of ROU assets	$ 0.4	$ 0.7
Interest on lease liabilities	0.0	0.1
Operating lease costs	6.3	12.5
Total lease costs	$ 6.7	$ 13.3