Leases - Quantitative Disclosures (Details) $ in Millions	3 Months Ended	6 Months Ended
	Jun. 29, 2019 USD ($)	Jun. 29, 2019 USD ($)
Lease expenses
Operating lease expenses	$ 7.4	$ 15.0
Finance lease amortization expenses	0.1	0.1
Short-term lease expenses	1.2	1.9
Variable lease expenses	2.3	2.7
Sublease income	(0.1)	(0.1)
Total lease expenses	10.9	19.6
Right-of-use assets obtained in exchange for new operating lease liabilities	$ 1.0	2.0
—Operating cash flows from operating leases		12.6
—Financing cash flows from finance leases		0.2
Cash paid for amounts included in the measurement of lease liabilities:		$ 12.8
Weighted-average remaining lease term — finance leases	13 years 5 months	13 years 5 months
Weighted-average remaining lease term — operating leases	10 years 3 months	10 years 3 months
Weighted-average discount rate — finance leases (percent)	2.60%	2.60%
Weighted-average discount rate — operating leases (percent)	5.70%	5.70%