Condensed Consolidating Financial Information (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 28, 2017	Sep. 29, 2016	Sep. 28, 2017	Sep. 29, 2016	Sep. 28, 2017	Dec. 31, 2016
Condensed Consolidating Statements of Operations [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 expense, net	1.9	(0.3)	4.6	(8.7)
Income (loss) before income taxes and equity in net loss of affiliates and subsidiaries	202.9	201.9	316.7	508.0
Income tax provision	(55.9)	(57.3)	(84.9)	(147.8)
Income (loss) Before Equity In Net Income (Loss) Of Affiliates and Subsidiaries	147.0	144.6	231.8	360.2
Equity in net income of affiliate	0.2	0.5	0.3	1.3
Equity in net income of subsidiaries	0.0		0.0
Net income	147.2	145.1	232.1	361.5
Total other comprehensive income (loss)	13.8	(8.5)	33.6	(42.9)
Comprehensive Income, Net of Tax, Attributable to Parent	161.0	136.6	265.7	318.6
Current assets
Cash and cash equivalents	726.6	670.4	697.7	957.3	$ 726.6	$ 697.7
Restricted Cash and Cash Equivalents					3.2	0.0
Accounts receivable, net					851.7	660.5
Inventory					1,363.2	1,515.3
Other current assets					67.3	36.9
Total current assets					3,012.0	2,910.4
Property, plant and equipment, net					2,018.7	1,991.6
Pension assets					309.2	282.3
Other assets					197.3	220.9
Total assets					5,537.2	5,405.2
Current liabilities
Accounts payable					762.1	579.7
Accrued expenses					258.3	216.2
Profit sharing					65.7	101.4
Current portion of long-term debt					27.9	26.7
Advance payments, short-term					131.0	199.3
Deferred revenue and other deferred credits, short-term					68.3	312.1
Deferred grant income liability - current					21.0	14.4
Other current liabilities					601.7	94.4
Total current liabilities					1,936.0	1,544.2
Long-term debt					1,060.9	1,060.0
Advance payments, long-term					255.6	342.0
Pension/OPEB obligation					40.3	43.9
Deferred grant income liability - non-current					44.9	63.4
Deferred revenue and other deferred credits					166.5	146.8
Other liabilities					273.6	276.1
Total equity					1,759.4	1,928.8
Total liabilities and equity					5,537.2	5,405.2
Operating activities
Net cash (used in) operating activities	624.6	574.4	624.6	574.4
Investing activities
Purchase of property, plant and equipment	(138.7)	(156.8)	(138.7)	(156.8)
Proceeds from Sales of Assets, Investing Activities	0.3			0.6
Payments for (Proceeds from) Other Investing Activities				0.0
Proceeds from sale of assets			0.3	0.6
Net cash used in investing activities	(138.4)	(156.2)	(138.4)	(156.2)
Proceeds from Issuance of Senior Long-term Debt			0.0	299.8
Financing activities
Principal payments of debt	(2.3)	(16.7)	(2.3)	(16.7)
Repayments of Debt			12.5	0.0
Repayments of Senior Debt		300.0	0.0	300.0
Payments Related to Tax Withholding for Share-based Compensation	(13.8)	(15.2)	(13.8)	(15.2)
Proceeds from Issuance of Long-term Debt		299.8
Debt issuance and financing costs	(0.9)	(17.2)	(0.9)	(17.2)
Proceeds from Other Debt	7.6		7.6	0.0
Proceeds from (Payments for) Other Financing Activities	0.0	0.0
Payments for Repurchase of Common Stock	(402.1)	(649.6)	(402.1)	(649.6)
Proceeds from (Repayments of) Restricted Cash, Financing Activities	(3.2)		(3.2)	0.0
Proceeds from subsidiary (payments to Parent) to pay dividends	0.0
Payments of Dividends	(35.7)		(35.7)	0.0
Excess tax benefit of share-based payment arrangements		(0.1)	0.0	(0.1)
Net cash used in financing activities	(462.9)	(699.0)	(462.9)	(699.0)
Effect of exchange rate changes on cash and cash equivalents	5.6	(6.1)	5.6	(6.1)
Net decrease in cash and cash equivalents for the period	28.9	(286.9)	28.9	(286.9)
Cash and cash equivalents, beginning of period			697.7	957.3
Cash and cash equivalents, end of period	726.6	670.4	726.6	670.4
Consolidation, Eliminations [Member]
Condensed Consolidating Statements of Operations [Abstract]
Net revenues	(136.6)	(146.6)	(458.1)	(473.3)
Operating costs and expenses
Cost of sales	(136.6)	(146.6)	(458.1)	(473.3)
Unusual or Infrequent Item, or Both, Net of Insurance Proceeds			0.0
Total operating costs and expenses	(136.6)	(146.6)	(458.1)	(473.3)
Interest expense and financing fee amortization	1.4	1.8	4.5	5.7
Other expense, net	(1.4)	(1.8)	(4.5)	(5.7)
Equity in net income of affiliate	(0.2)	(0.5)	(0.3)	(1.3)
Equity in net income of subsidiaries	(167.8)	(157.4)	(314.7)	(408.7)
Net income	(168.0)	(157.9)	(315.0)	(410.0)
Total other comprehensive income (loss)	(28.1)	26.2	(68.6)	87.4
Comprehensive Income, Net of Tax, Attributable to Parent	(196.1)	(131.7)	(383.6)	(322.6)
Current assets
Restricted Cash and Cash Equivalents					0.0
Accounts receivable, net					(355.6)	(373.9)
Total current assets					(355.6)	(373.9)
Investment in subsidiary					(2,436.4)	(2,473.2)
Other assets					(257.4)	(279.4)
Total assets					(3,049.4)	(3,126.5)
Current liabilities
Accounts payable					(355.6)	(373.9)
Total current liabilities					(355.6)	(373.9)
Long-term debt					(156.8)	(199.4)
Other liabilities					(100.6)	(80.0)
Total equity					(2,436.4)	(2,473.2)
Total liabilities and equity					(3,049.4)	(3,126.5)
Investing activities
Proceeds from Sales of Assets, Investing Activities	0.0			0.0
Payments for (Proceeds from) Other Investing Activities				0.0
Financing activities
Repayments of Debt			0.0
Repayments of Senior Debt		0.0
Payments Related to Tax Withholding for Share-based Compensation	0.0	0.0
Debt issuance and financing costs	0.0
Proceeds from Other Debt	0.0
Proceeds from (Payments for) Other Financing Activities	0.0	0.0
Payments for Repurchase of Common Stock		0.0
Proceeds from (Repayments of) Restricted Cash, Financing Activities	0.0
Proceeds from subsidiary (payments to Parent) to pay dividends	0.0
Payments of Dividends	0.0
Excess tax benefit of share-based payment arrangements		0.0
Parent Company [Member]
Operating costs and expenses
Selling, general and administrative	3.9	2.2	8.8	6.0
Unusual or Infrequent Item, or Both, Net of Insurance Proceeds			0.0
Total operating costs and expenses	3.9	2.2	8.8	6.0
Operating income	(3.9)	(2.2)	(8.8)	(6.0)
Income (loss) before income taxes and equity in net loss of affiliates and subsidiaries	(3.9)	(2.2)	(8.8)	(6.0)
Income tax provision	0.8	0.6	2.7	1.8
Income (loss) Before Equity In Net Income (Loss) Of Affiliates and Subsidiaries	(3.1)	(1.6)	(6.1)	(4.2)
Equity in net income of affiliate	0.2	0.5	0.3	1.3
Equity in net income of subsidiaries	150.1	146.2	237.9	364.4
Net income	147.2	145.1	232.1	361.5
Total other comprehensive income (loss)	13.8	(8.5)	33.6	(42.9)
Comprehensive Income, Net of Tax, Attributable to Parent	161.0	136.6	265.7	318.6
Current assets
Restricted Cash and Cash Equivalents					0.0
Investment in subsidiary					1,759.4	1,928.8
Total assets					1,759.4	1,928.8
Current liabilities
Total equity					1,759.4	1,928.8
Total liabilities and equity					1,759.4	1,928.8
Investing activities
Proceeds from Sales of Assets, Investing Activities	0.0			0.0
Payments for (Proceeds from) Other Investing Activities				0.0
Financing activities
Repayments of Debt			0.0
Repayments of Senior Debt		0.0
Payments Related to Tax Withholding for Share-based Compensation	0.0	0.0
Debt issuance and financing costs	0.0
Proceeds from Other Debt	0.0
Proceeds from (Payments for) Other Financing Activities	402.1	649.6
Payments for Repurchase of Common Stock	(402.1)	(649.6)
Proceeds from (Repayments of) Restricted Cash, Financing Activities	0.0
Proceeds from subsidiary (payments to Parent) to pay dividends	35.7
Payments of Dividends	(35.7)
Excess tax benefit of share-based payment arrangements		0.0
Non-Guarantor Subsidiaries [Member]
Condensed Consolidating Statements of Operations [Abstract]
Net revenues	311.8	308.7	1,025.4	984.5
Operating costs and expenses
Cost of sales	284.0	287.2	913.5	896.7
Selling, general and administrative	3.6	3.4	10.7	12.0
Unusual or Infrequent Item, or Both, Net of Insurance Proceeds			0.0
Research and development	0.7	0.4	1.8	1.5
Total operating costs and expenses	288.3	291.0	926.0	910.2
Operating income	23.5	17.7	99.4	74.3
Interest expense and financing fee amortization	(1.3)	(1.9)	(4.5)	(6.0)
Other expense, net	(0.7)	(2.5)	(0.7)	(14.5)
Income (loss) before income taxes and equity in net loss of affiliates and subsidiaries	21.5	13.3	94.2	53.8
Income tax provision	(3.7)	(2.1)	(17.4)	(9.5)
Income (loss) Before Equity In Net Income (Loss) Of Affiliates and Subsidiaries	17.8	11.2	76.8	44.3
Equity in net income of affiliate	0.2	0.5	0.3	1.3
Net income	18.0	11.7	77.1	45.6
Total other comprehensive income (loss)	14.3	(17.7)	35.0	(44.5)
Comprehensive Income, Net of Tax, Attributable to Parent	32.3	(6.0)	112.1	1.1
Current assets
Cash and cash equivalents	38.8	61.0	17.6	63.1	38.8	17.6
Restricted Cash and Cash Equivalents					0.0
Accounts receivable, net					330.4	249.4
Inventory					438.1	456.5
Other current assets					3.6	7.9
Total current assets					810.9	731.4
Property, plant and equipment, net					519.3	529.3
Pension assets					15.4	14.2
Other assets					121.1	101.4
Total assets					1,466.7	1,376.3
Current liabilities
Accounts payable					431.8	426.6
Accrued expenses					26.5	23.4
Profit sharing					2.7	4.2
Current portion of long-term debt					0.8	1.6
Deferred revenue and other deferred credits, short-term					1.5	1.3
Deferred grant income liability - current					21.0	14.4
Other current liabilities					4.5	0.2
Total current liabilities					488.8	471.7
Long-term debt					165.3	206.9
Deferred grant income liability - non-current					44.9	63.4
Deferred revenue and other deferred credits					2.9	3.4
Other liabilities					7.9	6.6
Total equity					756.9	624.3
Total liabilities and equity					1,466.7	1,376.3
Operating activities
Net cash (used in) operating activities	98.9	93.1
Investing activities
Purchase of property, plant and equipment	(16.6)	(35.4)
Proceeds from Sales of Assets, Investing Activities	0.0			0.0
Payments for (Proceeds from) Other Investing Activities				(0.4)
Net cash used in investing activities	(16.6)	(35.8)
Financing activities
Principal payments of debt	(1.6)	(2.3)
Repayments of Debt			0.0
Repayments of Senior Debt		0.0
Collection on (repayment of) intercompany debt	(65.1)	(51.0)
Payments Related to Tax Withholding for Share-based Compensation	0.0	0.0
Debt issuance and financing costs	0.0
Proceeds from Other Debt	0.0
Proceeds from (Payments for) Other Financing Activities	0.0	0.0
Payments for Repurchase of Common Stock		0.0
Proceeds from (Repayments of) Restricted Cash, Financing Activities	0.0
Proceeds from subsidiary (payments to Parent) to pay dividends	0.0
Payments of Dividends	0.0
Excess tax benefit of share-based payment arrangements		0.0
Net cash used in financing activities	(66.7)	(53.3)
Effect of exchange rate changes on cash and cash equivalents	5.6	(6.1)
Net decrease in cash and cash equivalents for the period	21.2	(2.1)
Cash and cash equivalents, beginning of period			17.6	63.1
Cash and cash equivalents, end of period	38.8	61.0	38.8	61.0
Subsidiary Issuer [Member]
Condensed Consolidating Statements of Operations [Abstract]
Net revenues	1,573.0	1,549.3	4,701.1	4,711.7
Operating costs and expenses
Cost of sales	1,331.1	1,298.8	4,282.9	4,047.0
Selling, general and administrative	41.3	46.6	127.3	154.4
Unusual or Infrequent Item, or Both, Net of Insurance Proceeds			19.9
Research and development	8.8	5.0	19.4	14.4
Total operating costs and expenses	1,381.2	1,350.4	4,449.5	4,215.8
Operating income	191.8	198.9	251.6	495.9
Interest expense and financing fee amortization	(10.5)	(12.1)	(30.1)	(47.2)
Other expense, net	4.0	4.0	9.8	11.5
Income (loss) before income taxes and equity in net loss of affiliates and subsidiaries	185.3	190.8	231.3	460.2
Income tax provision	(53.0)	(55.8)	(70.2)	(140.1)
Income (loss) Before Equity In Net Income (Loss) Of Affiliates and Subsidiaries	132.3	135.0	161.1	320.1
Equity in net income of subsidiaries	17.7	11.2	76.8	44.3
Net income	150.0	146.2	237.9	364.4
Total other comprehensive income (loss)	13.8	(8.5)	33.6	(42.9)
Comprehensive Income, Net of Tax, Attributable to Parent	163.8	137.7	271.5	321.5
Current assets
Cash and cash equivalents	687.8	609.4	680.1	894.2	687.8	680.1
Restricted Cash and Cash Equivalents					3.2
Accounts receivable, net					876.9	785.0
Inventory					925.1	1,058.8
Other current assets					63.7	29.0
Total current assets					2,556.7	2,552.9
Property, plant and equipment, net					1,499.4	1,462.3
Pension assets					293.8	268.1
Investment in subsidiary					677.0	544.4
Other assets					333.6	398.9
Total assets					5,360.5	5,226.6
Current liabilities
Accounts payable					685.9	527.0
Accrued expenses					231.8	192.8
Profit sharing					63.0	97.2
Current portion of long-term debt					27.1	25.1
Advance payments, short-term					131.0	199.3
Deferred revenue and other deferred credits, short-term					66.8	310.8
Other current liabilities					597.2	94.2
Total current liabilities					1,802.8	1,446.4
Long-term debt					1,052.4	1,052.5
Advance payments, long-term					255.6	342.0
Pension/OPEB obligation					40.3	43.9
Deferred revenue and other deferred credits					163.6	143.4
Other liabilities					366.3	349.5
Total equity					1,679.5	1,848.9
Total liabilities and equity					$ 5,360.5	$ 5,226.6
Operating activities
Net cash (used in) operating activities	525.7	481.3
Investing activities
Purchase of property, plant and equipment	(122.1)	(121.4)
Proceeds from Sales of Assets, Investing Activities	0.3			0.6
Payments for (Proceeds from) Other Investing Activities				0.4
Net cash used in investing activities	(121.8)	(120.4)
Financing activities
Principal payments of debt	(0.7)	(14.4)
Repayments of Debt			(12.5)
Repayments of Senior Debt		(300.0)
Collection on (repayment of) intercompany debt	65.1	51.0
Payments Related to Tax Withholding for Share-based Compensation	(13.8)	(15.2)
Proceeds from Issuance of Long-term Debt		299.8
Debt issuance and financing costs	(0.9)	(17.2)
Proceeds from Other Debt	7.6
Proceeds from (Payments for) Other Financing Activities	(402.1)	(649.6)
Payments for Repurchase of Common Stock	0.0	0.0
Proceeds from (Repayments of) Restricted Cash, Financing Activities	(3.2)
Proceeds from subsidiary (payments to Parent) to pay dividends	(35.7)
Payments of Dividends
Excess tax benefit of share-based payment arrangements		(0.1)
Net cash used in financing activities	(396.2)	(645.7)
Net decrease in cash and cash equivalents for the period	7.7	(284.8)
Cash and cash equivalents, beginning of period			680.1	894.2
Cash and cash equivalents, end of period	$ 687.8	$ 609.4	$ 687.8	$ 609.4