Consolidated Statements of Operations (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 29, 2018	Mar. 30, 2017
Revenues [Abstract]
Revenue	$ 1,736.1	$ 1,694.1
Operating costs and expenses
Cost of sales	1,511.0	1,421.0
Selling, general and administrative	56.2	52.9
Unusual or Infrequent Item, or Both, Net of Insurance Proceeds	0.0	10.8
Research and development	9.4	5.0
Total operating costs and expenses	1,576.6	1,489.7
Operating income	159.5	204.4
Interest expense and financing fee amortization	(11.3)	(9.5)
Other income, net	(4.1)	(10.7)
Income before income taxes and equity in net income of affiliate	152.3	205.6
Income tax provision	(27.5)	(64.0)
Income before equity in net income of affiliate	124.8	141.6
Equity in net income of affiliate	0.6	0.1
Net income	$ 125.4	$ 141.7
Earnings per share
Earnings Per Share, Basic	$ 1.11	$ 1.19
Diluted (in dollars per share)	1.10	1.17
Common Stock, Dividends, Per Share, Declared	$ 0.10	$ 0.10