Inventory (Details 1) (USD $)					12 Months Ended							12 Months Ended						3 Months Ended
	Mar. 28, 2013	Dec. 31, 2012	Mar. 28, 2013 Inventory Type Two [Member]	Dec. 31, 2012 Inventory Type Two [Member]	Dec. 31, 2012 Inventory Type Three [Member]	Mar. 28, 2013 Inventory Type Five [Member]	Dec. 31, 2012 Inventory Type Five [Member]	Mar. 28, 2013 Airbus Three Hundred Fifty XWB [Member]	Dec. 31, 2012 Airbus Three Hundred Fifty XWB [Member]	Mar. 28, 2013 Inventory Type Six [Member]	Dec. 31, 2012 Inventory Type Six [Member]	Dec. 31, 2012 Inventory Type Eight [Member]	Mar. 28, 2013 Inventory Type Eight [Member]	Mar. 28, 2013 Inventory Type Ten [Member]	Dec. 31, 2012 Inventory Type Ten [Member]	Mar. 28, 2013 Other Inventory Contracts [Member]	Dec. 31, 2012 Other Inventory Contracts [Member]	Mar. 29, 2012 G280 [Member]	Mar. 28, 2013 G280 [Member]	Dec. 31, 2012 G280 [Member]	Mar. 28, 2013 G650 [Member]	Dec. 31, 2012 G650 [Member]	Mar. 28, 2013 Sikorsky [Member]	Dec. 31, 2012 Sikorsky [Member]	Mar. 28, 2013 Boeing Sustaining [Member]	Dec. 31, 2012 Boeing Sustaining [Member]	Mar. 28, 2013 Bombardier C Series [Member]	Dec. 31, 2012 Bombardier C Series [Member]
Inventory By Platform [Abstract]
Inventory	$ 2,492,900,000	$ 2,410,800,000	$ 100,400,000	$ 82,200,000		$ 847,900,000	$ 852,400,000	$ 451,800,000	$ 409,800,000	$ 91,800,000	$ 106,400,000			$ 48,900,000	$ 45,000,000	$ 51,300,000	$ 102,300,000		$ 98,200,000	$ 68,300,000	$ 406,900,000	$ 379,900,000	$ 3,800,000	$ 4,700,000	$ 387,000,000	$ 355,600,000	$ 4,900,000	$ 4,200,000
Inventory In Process	1,199,600,000	1,202,300,000	93,900,000	83,600,000		227,000,000	225,200,000	138,400,000	133,200,000	79,900,000	88,200,000	12,600,000	17,600,000	48,900,000	45,000,000	47,600,000	98,300,000		57,500,000	83,300,000	49,800,000	36,700,000			434,300,000	392,300,000	4,700,000	3,900,000
Non Recurring Production Costs Included In Inventory [Abstract]
Nonrecurring production cost included in inventory	109,800,000	117,500,000		(700,000)		32,100,000	26,600,000	40,200,000	51,300,000							3,700,000	4,000,000						3,800,000	4,700,000	30,000,000	31,600,000
Capitalized Preproduction Costs Included In Inventory [Abstract]
Capitalized pre-production	510,000,000	524,600,000	6,800,000			181,900,000	189,500,000	56,800,000	56,800,000			51,400,000	49,000,000						5,400,000	5,500,000	203,300,000	208,400,000			6,800,000	5,800,000
Net Forward Loss Charge Recorded					8,000,000							151,000,000						10.7
Provision for Loss on Contracts	622,600,000	607,400,000	(5,100,000)	(11,500,000)		(199,300,000)	(184,000,000)	(8,600,000)	(8,900,000)			(115,200,000)	(121,400,000)						(118,800,000)	(118,800,000)	(162,500,000)	(162,500,000)			(6,900,000)	(6,500,000)
Deferred Production Costs And Credit Balances [Abstract]
Deferred Production Costs	1,296,100,000	1,173,800,000	4,800,000	3,600,000		606,200,000	595,100,000	225,000,000	177,400,000	11,900,000	18,200,000	51,200,000	54,800,000						154,100,000	98,300,000	316,300,000	297,300,000			(77,200,000)	(67,600,000)	200,000	300,000
Contract Liability					$ 1,500,000							$ 35,800,000