Consolidated Statements of Operations - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 26, 2019	Jun. 27, 2019	Mar. 28, 2019	Dec. 31, 2018	Sep. 27, 2018	Jun. 28, 2018	Mar. 29, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Statement [Abstract]
Net revenues	$ 1,959.3	$ 1,919.9	$ 2,016.1	$ 1,967.8	$ 1,835.3	$ 1,813.7	$ 1,836.9	$ 1,736.1	$ 7,863.1	$ 7,222.0	$ 6,983.0
Operating costs and expenses
Cost of sales									6,786.4	6,135.9	6,195.3
Selling, general and administrative									261.4	210.4	204.7
Unusual or Infrequent Item, or Both, Net of Insurance Proceeds									0.0	(10.0)	19.9
Research and development									54.5	42.5	31.2
Total operating costs and expenses									7,102.3	6,378.8	6,451.1
Operating income	95.7	206.1	226.0	233.0	243.6	222.5	217.6	159.5	760.8	843.2	531.9
Interest expense and financing fee amortization									(91.9)	(80.0)	(41.7)
Other (expense) income, net									5.8	7.0	(44.4)
Income before income taxes and equity in net income of affiliates									663.1	756.2	534.6
Income tax provision									(132.8)	(139.8)	(180.0)
Income before equity in net income of affiliates									530.3	616.4	354.6
Equity in net income of affiliates									(0.2)	0.6	0.3
Net income	$ 67.7	$ 131.3	$ 168.0	$ 163.1	$ 177.6	$ 168.8	$ 145.2	$ 125.4	$ 530.1	$ 617.0	$ 354.9
Earnings per share
Basic (in dollars per share)	$ 0.65	$ 1.27	$ 1.62	$ 1.57	$ 1.70	$ 1.61	$ 1.32	$ 1.11	$ 5.11	$ 5.71	$ 3.04
Earnings Per Share, Diluted	0.65	1.26	1.61	1.55	1.68	1.59	1.31	1.10	5.06	5.65	3.01
Common Stock, Dividends, Per Share, Declared	$ 0.12	$ 0.12	$ 0.12	$ 0.12	$ 0.12	$ 0.12	$ 0.12	$ 0.10	$ 0.48	$ 0.46	$ 0.40