Consolidated Statements of Operations (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Oct. 01, 2020	Sep. 30, 2021	Oct. 01, 2020
Income Statement [Abstract]
Revenues	$ 980.0	$ 806.3	$ 2,882.9	$ 2,528.2
Operating costs and expenses
Cost of sales	1,036.2	903.4	3,009.4	2,941.0
Selling, general and administrative	86.8	52.8	211.3	179.2
Restructuring Charges	0.8	19.5	8.1	68.4
Research and development	12.8	7.5	34.3	28.1
Gain (Loss) on Disposition of Property Plant Equipment	0.0	0.0	0.0	22.9
Total operating costs and expenses	1,136.6	983.2	3,263.1	3,239.6
Operating loss	(156.6)	(176.9)	(380.2)	(711.4)
Interest expense and financing fee amortization	(58.8)	(53.0)	(177.7)	(133.8)
Other income (expense), net	(94.8)	10.0	(138.7)	65.4
Loss before income taxes and equity in net loss of affiliate	(120.6)	(239.9)	(419.2)	(910.6)
Income tax benefit	7.9	85.2	0.6	340.0
Loss before equity in net loss of affiliate	(112.7)	(154.7)	(418.6)	(570.6)
Equity in net loss of affiliate	(0.9)	(0.8)	(1.9)	(3.8)
Net loss	$ (113.6)	$ (155.5)	$ (420.5)	$ (574.4)
Loss per share
Earnings Per Share, Basic	$ (1.09)	$ (1.50)	$ (4.04)	$ (5.53)
Diluted (in dollars per share)	$ (1.09)	$ (1.50)	$ (4.04)	$ (5.53)