Leases - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 29, 2020	Dec. 29, 2019	Dec. 31, 2018
Lessee, Lease, Description [Line Items]
Leases, remaining lease term (years)	15 years
Operating lease right-of-use assets	$ 89.2	$ 60.4
Operating lease current liabilities	19.2	20.1
Operating lease noncurrent liabilities	$ 72.7	$ 43.3
Operating lease, weighted average discount rate	4.80%
2020, remaining	$ 2.2
2021	3.3
2022	3.3
2023	3.4
2024	3.4
2025	3.4
Thereafter	$ 34.0
Accounting Standards Update 2016-02
Lessee, Lease, Description [Line Items]
Operating lease right-of-use assets			$ 74.1
Operating lease current liabilities			19.8
Operating lease noncurrent liabilities			$ 54.3
Minimum
Lessee, Lease, Description [Line Items]
Leases, remaining lease term (years)	1 year
Maximum
Lessee, Lease, Description [Line Items]
Leases, remaining lease term (years)	15 years
Sale of Main Headquarters
Lessee, Lease, Description [Line Items]
Operating lease right-of-use assets	$ 37.6
Operating lease current liabilities	1.2
Operating lease noncurrent liabilities	$ 36.1