Segment Information (details) (USD $)	3 Months Ended		12 Months Ended
	Mar. 28, 2013	Mar. 29, 2012	Dec. 31, 2012
Segment Revenues
Revenues	$ 1,442,200,000	$ 1,265,800,000
Segment Operating Income
Business Segment Operating Income	206,500,000	167,400,000
Segment Information Unallocated Corporate Selling General And Administrative	(39,600,000)	(40,700,000)
Segment Information Unallocated Impact Of Severe Weather Event	(8,800,000)
Segment Information Unallocated Research And Development	(1,800,000)	(1,100,000)
Segment Information Unallocated Cost Of Sales	(11,800,000)	(3,300,000)
Total operating income	144,500,000	122,300,000
Net Forward loss recorded	622,600,000		607,400,000
Forward loss recorded for the period	6,400,000
Textuals [Abstract]
Number Of Principal Segments	3
Percentage Of Net Revenue Derived From Two Largest Customers	92.00%
Number Of Largest Customers	2
Change In Estimate To Increase Warranty And Extraordinary Rework Reserve Included In Unallocated Cost Of Sale	10,000,000	2,300,000
Early Retirement Incentive	1,800,000	1,000,000
Fuselage Systems [Member]
Segment Revenues
Segment Revenues	717,900,000		622,600,000
Segment Operating Income
Business Segment Operating Income	121,400,000	88,100,000
Propulsion Systems [Member]
Segment Revenues
Segment Revenues	375,300,000		344,000,000
Segment Operating Income
Business Segment Operating Income	65,300,000	58,300,000
Wing Systems [Member]
Segment Revenues
Segment Revenues	343,300,000		296,600,000
Segment Operating Income
Business Segment Operating Income	18,200,000	20,800,000
Other Systems [Member]
Segment Revenues
Segment Revenues	5,700,000		2,600,000
Segment Operating Income
Business Segment Operating Income	1,600,000	200,000
B747-8 [Member]
Textuals [Abstract]
Net Forward Loss Charge Recorded		2.7
G280 [Member]
Segment Operating Income
Net Forward loss recorded	(118,800,000)		(118,800,000)
Textuals [Abstract]
Net Forward Loss Charge Recorded		10.7
B787
Segment Operating Income
Net Forward loss recorded	(199,300,000)		(184,000,000)
B787 | Wing Systems [Member]
Textuals [Abstract]
Net Forward Loss Charge Recorded	$ 15.3