Consolidated Statements of Operations (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 28, 2017	Sep. 29, 2016	Sep. 28, 2017	Sep. 29, 2016
Revenues [Abstract]
Net revenues	$ 1,748.2	$ 1,711.4	$ 5,268.4	$ 5,222.9
Operating costs and expenses
Cost of sales	1,478.5	1,439.4	4,738.3	4,470.4
Selling, general and administrative	48.8	52.2	146.8	172.4
Unusual or Infrequent Item, or Both, Net of Insurance Proceeds	0.0	0.0	19.9	0.0
Research and development	9.5	5.4	21.2	15.9
Total operating costs and expenses	1,536.8	1,497.0	4,926.2	4,658.7
Operating income	211.4	214.4	342.2	564.2
Interest expense and financing fee amortization	(10.4)	(12.2)	(30.1)	(47.5)
Other income (expense), net	(1.9)	0.3	(4.6)	8.7
Income before income taxes and equity in net income of affiliate	202.9	201.9	316.7	508.0
Income tax provision	(55.9)	(57.3)	(84.9)	(147.8)
Income before equity in net income of affiliate	147.0	144.6	231.8	360.2
Equity in net income of affiliate	0.2	0.5	0.3	1.3
Net income	$ 147.2	$ 145.1	$ 232.1	$ 361.5
Earnings per share
Basic (in dollars per share)	$ 1.27	$ 1.16	$ 1.97	$ 2.82
Diluted (in dollars per share)	1.26	1.16	1.95	2.80
Common Stock, Dividends, Per Share, Declared	$ 0.10	$ 0.00	$ 0.30	$ 0.00