Other Assets (Details) - USD ($) $ in Millions	3 Months Ended
	Apr. 02, 2020	Dec. 31, 2019	Mar. 28, 2019	Dec. 31, 2018
Other Assets [Line Items]
Intangible Assets, Gross (Excluding Goodwill)	$ 34.8	$ 4.8
Finite-Lived Intangible Assets, Amortization Expense, Remainder of Fiscal Year	1.6
Finite-Lived Intangible Assets, Amortization Expense, Year Two	2.1
Finite-Lived Intangible Assets, Amortization Expense, Year Three	2.1
Finite-Lived Intangible Assets, Amortization Expense, Year Four	2.1
Finite-Lived Intangible Assets, Amortization Expense, Year Five	2.1
Finite-Lived Intangible Assets, Amortization Expense, Year Six	2.1
Intangible assets
Deferred financing costs, net	7.6	4.8
Goodwill - Europe	78.5	2.4
Equity in net assets of affiliates	6.2	7.7
Customer Supply Agreement	10.1	11.5
Restricted Cash, Noncurrent	16.5	16.4	$ 16.3	$ 20.2
Other	39.2	36.4
Total	79.6	76.8
Intangible Assets, Net (Excluding Goodwill)	$ 30.6	1.2
Weighted Average Amortization Period Intangible Assets	P14Y9M18D
Patents [Member]
Other Assets [Line Items]
Intangible Assets, Gross (Excluding Goodwill)	$ 2.0	2.0
Finite-Lived Intangible Assets, Amortization Expense, Remainder of Fiscal Year	0.0
Finite-Lived Intangible Assets, Amortization Expense, Year Two	0.0
Finite-Lived Intangible Assets, Amortization Expense, Year Three	0.0
Finite-Lived Intangible Assets, Amortization Expense, Year Four	0.0
Finite-Lived Intangible Assets, Amortization Expense, Year Five	0.0
Finite-Lived Intangible Assets, Amortization Expense, Year Six	0.0
Intangible assets
Less: Accumulated amortization	2.0	1.9
Favorable Leasehold [Member]
Other Assets [Line Items]
Intangible Assets, Gross (Excluding Goodwill)	2.8	2.8
Finite-Lived Intangible Assets, Amortization Expense, Remainder of Fiscal Year	0.1
Finite-Lived Intangible Assets, Amortization Expense, Year Two	0.1
Finite-Lived Intangible Assets, Amortization Expense, Year Three	0.1
Finite-Lived Intangible Assets, Amortization Expense, Year Four	0.1
Finite-Lived Intangible Assets, Amortization Expense, Year Five	0.1
Finite-Lived Intangible Assets, Amortization Expense, Year Six	0.1
Intangible assets
Less: Accumulated amortization	$ 1.7	1.7
Weighted Average Amortization Period Intangible Assets	P9Y6M
Debt issuance costs [Member]
Intangible assets
Deferred financing costs	$ 45.1	41.7
Less: Accumulated amortization-deferred financing costs	(37.5)	(36.9)
Developed Technology [Member]
Other Assets [Line Items]
Intangible Assets, Gross (Excluding Goodwill)	30.0	0.0
Finite-Lived Intangible Assets, Amortization Expense, Remainder of Fiscal Year	1.5
Finite-Lived Intangible Assets, Amortization Expense, Year Two	2.0
Finite-Lived Intangible Assets, Amortization Expense, Year Three	2.0
Finite-Lived Intangible Assets, Amortization Expense, Year Four	2.0
Finite-Lived Intangible Assets, Amortization Expense, Year Five	2.0
Finite-Lived Intangible Assets, Amortization Expense, Year Six	2.0
Intangible assets
Less: Accumulated amortization	$ 0.5	$ 0.0
Weighted Average Amortization Period Intangible Assets	P15Y