Condensed Consolidating Financial Information (Details) (USD $)	3 Months Ended				6 Months Ended		9 Months Ended		12 Months Ended									12 Months Ended
	Dec. 31, 2012	Mar. 29, 2012	Dec. 31, 2011	Mar. 31, 2011	Jun. 28, 2012	Jun. 30, 2011	Sep. 27, 2012	Sep. 29, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Sep. 30, 2009 Senior Unsecured Notes Due Two Thousand And Seventeen [Member]	Nov. 18, 2010 Senior Unsecured Notes Due Two Thousand And Twenty [Member]	Dec. 31, 2012 Class A [Member]	Dec. 31, 2011 Class A [Member]	Dec. 31, 2012 Class B	Dec. 31, 2011 Class B	Dec. 31, 2012 Holdings	Dec. 31, 2011 Holdings	Dec. 31, 2010 Holdings	Dec. 31, 2012 Spirit [Member]	Dec. 31, 2011 Spirit [Member]	Dec. 31, 2010 Spirit [Member]	Dec. 31, 2012 Guarantor Subsidiaries [Member]	Dec. 31, 2011 Guarantor Subsidiaries [Member]	Dec. 31, 2010 Guarantor Subsidiaries [Member]	Dec. 31, 2012 Non-Guarantor Subsidiaries [Member]	Dec. 31, 2011 Non-Guarantor Subsidiaries [Member]	Dec. 31, 2010 Non-Guarantor Subsidiaries [Member]	Dec. 31, 2012 Consolidating Adjustments [Member]	Dec. 31, 2011 Consolidating Adjustments [Member]	Dec. 31, 2010 Consolidating Adjustments [Member]
Condensed Consolidating Statements of Operations [Abstract]
Net revenues	$ 1,425,600,000	$ 1,265,800,000	$ 1,218,900,000	$ 1,049,600,000	$ 1,341,000,000	$ 1,465,600,000	$ 1,365,300,000	$ 1,129,700,000	$ 5,397,700,000	$ 4,863,800,000	$ 4,172,400,000										$ 4,910,100,000	$ 4,401,400,000	$ 3,741,100,000	$ 151,500,000	$ 22,400,000	$ 10,300,000	$ 594,200,000	$ 536,600,000	$ 511,600,000	$ (258,100,000)	$ (96,600,000)	$ (90,600,000)
Operating costs and expenses
Cost of Sales									5,245,300,000	4,312,100,000	3,607,900,000										4,842,100,000	3,898,200,000	3,232,800,000	141,400,000	18,300,000	6,200,000	519,900,000	492,200,000	459,500,000	(258,100,000)	(96,600,000)	(90,600,000)
Selling, general and administrative									172,200,000	159,900,000	156,000,000							3,000,000	4,400,000	3,900,000	145,800,000	134,000,000	129,300,000	2,800,000	2,600,000	3,100,000	20,600,000	18,900,000	19,700,000
Gain On Insurance Settlement Severe Weather Event									146,200,000												146,200,000
Research and development									34,100,000	35,700,000	51,500,000										32,800,000	34,900,000	49,000,000				1,300,000	800,000	2,500,000
Total operating costs and expenses									5,305,400,000	4,507,700,000	3,815,400,000							3,000,000	4,400,000	3,900,000	4,874,500,000	4,067,100,000	3,411,100,000	144,200,000	20,900,000	9,300,000	541,800,000	511,900,000	481,700,000	(258,100,000)	(96,600,000)	(90,600,000)
Operating income	98,000,000	122,300,000	102,400,000	69,600,000	82,500,000	63,600,000	(210,500,000)	120,500,000	92,300,000	356,100,000	357,000,000							(3,000,000)	(4,400,000)	(3,900,000)	35,600,000	334,300,000	330,000,000	7,300,000	1,500,000	1,000,000	52,400,000	24,700,000	29,900,000
Interest expense and financing fee amortization									(82,900,000)	(77,500,000)	(59,100,000)										(81,900,000)	(76,300,000)	(58,300,000)				(10,300,000)	(7,200,000)	(4,500,000)	9,300,000	6,000,000	3,700,000
Interest income									200,000	300,000	300,000										9,400,000	6,300,000	4,000,000				100,000			(9,300,000)	(6,000,000)	(3,700,000)
Other income (expense), net									1,800,000	1,400,000	(400,000)										(900,000)	4,500,000	4,000,000	(100,000)			2,800,000	(3,100,000)	(4,400,000)
Income (loss) before income taxes and equity in net loss of affiliates and subsidiaries									11,400,000	280,300,000	297,800,000							(3,000,000)	(4,400,000)	(3,900,000)	(37,800,000)	268,800,000	279,700,000	7,200,000	1,500,000	1,000,000	45,000,000	14,400,000	21,000,000
Income tax provision									24,100,000	(86,900,000)	(78,200,000)							(200,000)	1,600,000	1,400,000	34,100,000	(82,300,000)	(76,600,000)	(2,700,000)	(600,000)	(400,000)	(7,100,000)	(5,600,000)	(2,600,000)
Income (loss) Before Equity In Netincome (Loss) Of Affiliates and subsidiaries									35,500,000	193,400,000	219,600,000							(3,200,000)	(2,800,000)	(2,500,000)	(3,700,000)	186,500,000	203,100,000	4,500,000	900,000	600,000	37,900,000	8,800,000	18,400,000
Equity in net loss of affiliates									(700,000)	(1,000,000)	(700,000)							(700,000)	(1,000,000)	(700,000)	(1,300,000)	(700,000)	(100,000)				600,000	(300,000)	(600,000)	700,000	1,000,000	700,000
Equity in net income of subsidiaries																		38,700,000	196,200,000	222,100,000	42,400,000	9,800,000	19,000,000							(81,100,000)	(206,000,000)	(241,100,000)
Net income	60,700,000	73,600,000	60,400,000	34,600,000	34,900,000	30,100,000	(134,400,000)	67,300,000	34,800,000	192,400,000	218,900,000							34,800,000	192,400,000	218,900,000	37,400,000	195,600,000	222,000,000	4,500,000	900,000	600,000	38,500,000	8,500,000	17,800,000	(80,400,000)	(205,000,000)	(240,400,000)
Other Comprehensive Income (Loss), Net of Tax																		(19,000,000)	(50,900,000)	(15,600,000)	(32,200,000)	(46,800,000)	(10,100,000)				13,200,000	(4,100,000)	(5,500,000)	19,000,000	50,900,000	15,600,000
Comprehensive Income, Net of Tax, Attributable to Parent									15,800,000	141,500,000	203,300,000							15,800,000	141,500,000	203,300,000	5,200,000	148,800,000	211,900,000	4,500,000	900,000	600,000	51,700,000	4,400,000	12,300,000	(61,400,000)	(154,100,000)	(224,800,000)
Current assets
Cash and cash equivalents	440,700,000		177,800,000						440,700,000	177,800,000											369,100,000	106,700,000	416,100,000				71,600,000	71,100,000	65,500,000
Accounts receivable, net	420,700,000		267,200,000						420,700,000	267,200,000											513,200,000	318,800,000		13,700,000	8,900,000		171,700,000	130,700,000		(277,900,000)	(191,200,000)
Inventory	2,410,800,000		2,630,900,000						2,410,800,000	2,630,900,000											2,006,900,000	2,354,800,000		164,300,000	113,800,000		239,700,000	162,300,000		(100,000)
Deferred tax asset-current	57,100,000		52,200,000						57,100,000	52,200,000											57,100,000	52,200,000
Other current assets	26,100,000		27,700,000						26,100,000	27,700,000											22,200,000	25,500,000					3,900,000	2,200,000
Total current assets	3,355,400,000		3,155,800,000						3,355,400,000	3,155,800,000											2,968,500,000	2,858,000,000		178,000,000	122,700,000		486,900,000	366,300,000		(278,000,000)	(191,200,000)
Property, plant and equipment, net	1,698,500,000		1,615,700,000						1,698,500,000	1,615,700,000											1,221,100,000	1,118,300,000		289,300,000	319,200,000		188,100,000	178,200,000
Pension assets	78,400,000		118,800,000						78,400,000	118,800,000											69,900,000	118,300,000					8,500,000	500,000
Investiment in subsidiary																		1,013,700,000	997,300,000		281,400,000	279,900,000								(1,295,100,000)	(1,277,200,000)
Equity In Net Assets Of Subsidiaries																		983,200,000	967,400,000		58,200,000	12,500,000								(1,041,400,000)	(979,900,000)
Deferred tax asset non-current, net	192,000,000		55,700,000						192,000,000	55,700,000											192,300,000	55,000,000					(300,000)	700,000
Other assets	91,000,000		96,400,000						91,000,000	96,400,000											405,000,000	333,600,000		80,000,000	80,000,000		27,500,000	30,300,000		(421,500,000)	(347,500,000)
Total assets	5,415,300,000		5,042,400,000						5,415,300,000	5,042,400,000								1,996,900,000	1,964,700,000		5,196,400,000	4,775,600,000		547,300,000	521,900,000		710,700,000	576,000,000		(3,036,000,000)	(2,795,800,000)
Current liabilities
Accounts payable	659,000,000		559,400,000						659,000,000	559,400,000											616,300,000	477,000,000		157,200,000	129,300,000		163,400,000	144,300,000		(277,900,000)	(191,200,000)
Accrued expenses	216,300,000		200,800,000						216,300,000	200,800,000											188,400,000	167,500,000		2,600,000	300,000		25,300,000	33,000,000
Profit sharing	28,300,000		23,500,000						28,300,000	23,500,000											25,900,000	21,600,000					2,400,000	1,900,000
Current portion of long-term debt	10,300,000		48,900,000						10,300,000	48,900,000											6,600,000	39,800,000			5,600,000		3,700,000	3,500,000
Advance payments, short-term	70,700,000		8,800,000						70,700,000	8,800,000											70,700,000	8,800,000
Deferred revenue, short-term	18,400,000		28,500,000						18,400,000	28,500,000											16,600,000	27,200,000					1,800,000	1,300,000
Deferred Grant Income Liability Current	6,900,000		6,100,000						6,900,000	6,100,000														5,700,000	4,900,000		1,200,000	1,200,000
Other current liabilities	57,100,000		37,500,000						57,100,000	37,500,000											52,600,000	32,900,000					4,500,000	4,600,000
Total current liabilities	1,067,000,000		913,500,000						1,067,000,000	913,500,000											977,100,000	774,800,000		165,500,000	140,100,000		202,300,000	189,800,000		(277,900,000)	(191,200,000)
Long-term debt	1,165,900,000		1,152,000,000						1,165,900,000	1,152,000,000											1,142,900,000	1,126,200,000		80,000,000	80,000,000		284,500,000	213,300,000		(341,500,000)	(267,500,000)
Advance payments, long-term	833,600,000		655,900,000						833,600,000	655,900,000											833,600,000	655,900,000
Pension/OPEB obligation	75,600,000		84,200,000						75,600,000	84,200,000											75,600,000	84,200,000
Deferred Grant Income Liability Noncurrent	116,600,000		121,800,000						116,600,000	121,800,000														83,300,000	88,900,000		33,300,000	32,900,000
Deferred revenue and other deferred credits	30,800,000		34,700,000						30,800,000	34,700,000											21,100,000	24,000,000					9,700,000	10,700,000
Other liabilities	128,900,000		115,600,000						128,900,000	115,600,000											189,300,000	175,900,000					19,600,000	19,700,000		(80,000,000)	(80,000,000)
Equity
Preferred stock, par value $0.01, 10,000,000 shares authorized, no shares issued	0		0						0	0
Common stock														1,200,000	1,200,000	200,000	200,000
Additional paid-in capital	1,012,300,000		995,900,000						1,012,300,000	995,900,000
Accumulated other comprehensive loss	(145,200,000)		(126,200,000)						(145,200,000)	(126,200,000)
Retained earnings	1,127,900,000		1,093,100,000						1,127,900,000	1,093,100,000
Total shareholders' equity	1,996,400,000		1,964,200,000						1,996,400,000	1,964,200,000
Noncontrolling interest	500,000		500,000						500,000	500,000
Total equity	1,996,900,000		1,964,700,000						1,996,900,000	1,964,700,000								1,996,900,000	1,964,700,000		1,956,800,000	1,934,600,000		218,500,000	212,900,000		161,300,000	109,600,000		(2,336,600,000)	(2,257,100,000)
Total liabilities and equity	5,415,300,000		5,042,400,000						5,415,300,000	5,042,400,000								1,996,900,000	1,964,700,000		5,196,400,000	4,775,600,000		547,300,000	521,900,000		710,700,000	576,000,000		(3,036,000,000)	(2,795,800,000)
Operating activities
Net cash (used in) operating activities									544,400,000	(47,300,000)	125,100,000							34,800,000	193,500,000	219,700,000	586,600,000	(63,200,000)	124,600,000	4,600,000	25,700,000	(8,500,000)	(46,800,000)	(9,800,000)	9,000,000	(34,800,000)	(193,500,000)	(219,700,000)
Investing Activities
Purchase Of Property Plant And Equipment Severe Weather Event									(12,900,000)												12,900,000
Purchase of property, plant and equipment									(236,100,000)	(249,700,000)	(288,100,000)										(204,700,000)	(184,700,000)	(136,800,000)	(4,600,000)	(25,700,000)	(135,100,000)	(26,800,000)	(39,300,000)	(16,200,000)
Proceeds from Insurance Settlement, Investing Activities																					0
Contribution To Subsidiary																							143,600,000									(143,600,000)
Other Investing Activities									(1,400,000)		(800,000)
Other																					0								(800,000)
Proceeds from sale of assets									1,600,000	500,000	500,000										400,000	300,000	200,000				1,200,000	200,000	300,000
Equity in net assets of subsidiaries																		(34,800,000)	(193,500,000)	(219,700,000)	(1,600,000)						200,000			34,800,000	193,500,000	219,700,000
Net cash (used in) investing activities									(248,800,000)	(249,200,000)	(288,400,000)							(34,800,000)	(193,500,000)	(219,700,000)	(218,800,000)	(184,400,000)	(280,200,000)	(4,600,000)	(25,700,000)	(135,100,000)	(25,400,000)	(39,100,000)	(16,700,000)	34,800,000	193,500,000	363,300,000
Financing Activities
Proceeds from revolving credit facility									170,000,000	30,000,000	150,000,000										170,000,000	30,000,000	150,000,000
Repayments on revolving credit facility									170,000,000	30,000,000	150,000,000										170,000,000	30,000,000	150,000,000
Proceeds from Issuance of Long-term Debt									547,600,000												547,200,000		300,000,000				400,000
Proceeds from Issuance of Subordinated Long-term Debt											300,000,000
Principal payments of debt									(571,000,000)	(8,000,000)	(9,600,000)										(567,400,000)	(5,800,000)	(9,200,000)				(3,600,000)	(2,200,000)	(400,000)
Collection on (repayment of) intercompany debt																					(74,000,000)	(57,300,000)	(23,200,000)				74,000,000	57,300,000	23,200,000
Proceeds from parent company contribution																										143,600,000						(143,600,000)
Debt issuance and financing costs									(12,400,000)		(18,000,000)										(12,400,000)		(18,000,000)
Excess tax benefit of share-based payment arrangements									1,200,000	1,300,000	5,000,000										1,200,000	1,300,000	5,000,000
Net cash provided by (used in) financing activities									(34,600,000)	(6,700,000)	277,400,000										(105,400,000)	(61,800,000)	254,600,000			143,600,000	70,800,000	55,100,000	22,800,000			(143,600,000)
Effect of exchange rate changes on cash and cash equivalents									1,900,000	(600,000)	(1,500,000)																1,900,000	(600,000)	(1,500,000)
Net (decrease) in cash and cash equivalents for the period									262,900,000	(303,800,000)	112,600,000										262,400,000	(309,400,000)	99,000,000				500,000	5,600,000	13,600,000
Cash and cash equivalents, beginning of period		177,800,000			177,800,000		177,800,000		177,800,000		369,000,000										106,700,000	416,100,000	317,100,000				71,100,000	65,500,000	51,900,000
Cash and cash equivalents, end of period	440,700,000		177,800,000						440,700,000	177,800,000											369,100,000	106,700,000	416,100,000				71,600,000	71,100,000	65,500,000
Debt Instrument [Line Items]
Debt instrument, face amount												$ 300,000,000	$ 300,000,000
Preferred stock, par value	$ 0.01		$ 0.01						$ 0.01	$ 0.01
Preferred stock, shares authorized	10,000,000		10,000,000						10,000,000	10,000,000
Preferred stock, shares issued	0		0						0	0
Common stock, par value														$ 0.01	$ 0.01	$ 0.01	$ 0.01
Common stock, shares authorized														200,000,000	200,000,000	150,000,000	150,000,000
Common stock, shares issued														119,671,298	118,560,926	24,025,880	24,304,717