Leases - Weighted Average (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 28, 2020	Jun. 30, 2019	Jun. 28, 2020	Jun. 30, 2019
Leases [Abstract]
Operating lease liabilities arising from obtaining right-of-use assets, including impact of ASC 842 adoption	$ 0.5	$ 8.5	$ 1.0	$ 55.7
Finance lease liabilities arising from obtaining right-of-use assets, including impact of ASC 842 adoption	$ 0.0	$ 0.0	$ 0.4	$ 39.6
Weighted-average remaining lease term (in years):
Operating leases	5 years 7 months 2 days	5 years 7 months 6 days	5 years 7 months 2 days	5 years 7 months 6 days
Finance leases	18 years 5 months 4 days	19 years 4 months 24 days	18 years 5 months 4 days	19 years 4 months 24 days
Weighted-average discount rate:
Operating leases	6.47%	6.55%	6.47%	6.55%
Finance leases	6.52%	6.53%	6.52%	6.53%