Summary of Significant Accounting Policies (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	12 Months Ended
	Sep. 27, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Accounting Policies [Abstract]
KIESC Ownership Percentage		77.80%
Textuals [Line Items]
Cumulative Catch Up Adjustment		$ 95.5	$ 14.7	$ 13.8
Net Forward Loss Charge Recorded	590.0	1,133.3
Non-recurring Revenues		255.6	239.4	222.0
Revenue Reduction Consideration Given By Vendor To Customer		28.6	51.1
Allowance for Doubtful Accounts Receivable		0.2	4.3
Movement in Standard and Extended Product Warranty, Increase (Decrease) [Roll Forward]
Product Warranty And Extraordinary Rework, Beginning Balance		30.9	19.6
Charges to costs and expenses		38.3	12.0
Write-offs, net of recoveries		(0.6)	(0.9)
Exchange rate		0.1	0.2
Product Warranty And Extraordinary Rework, Ending Balance		68.7	30.9	19.6
Affiliates [Line Items]
Equity in net assets of affiliates		1.4	5.1
Taikoo Spirit AeroSystems Composite Co Ltd [Member]
Affiliates [Line Items]
Equity in net assets of affiliates		1.4
Variable Interest Entity Ownership Percentage		31.50%
Land and Land Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life		20 years
Building [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life		45 years
Minimum [Member] | Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life		3 years
Minimum [Member] | Tooling Airplane Program B787 Rolls Royce [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life		5 years
Minimum [Member] | Tooling Airplane Program All Others [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life		2 years
Minimum [Member] | Software [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life		3 years
Capitalization Policy, Service Life		1 year
Capitalization Policy, Software, Acquisition Cost		0.1
Maximum [Member] | Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life		20 years
Maximum [Member] | Tooling Airplane Program B787 Rolls Royce [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life		20 years
Maximum [Member] | Tooling Airplane Program All Others [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life		10 years
Maximum [Member] | Software [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life		7 years
Patents [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Finite-Lived Intangible Asset, Useful Life		6 years
Patents [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Finite-Lived Intangible Asset, Useful Life		16 years
Favorable Leasehold [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Finite-Lived Intangible Asset, Useful Life		14 years
Favorable Leasehold [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Finite-Lived Intangible Asset, Useful Life		24 years
Customer Relationship [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Finite-Lived Intangible Asset, Useful Life		8 years
Fuselage Systems [Member]
Textuals [Line Items]
Cumulative Catch Up Adjustment		60.1	(2.4)
Propulsion Systems [Member]
Textuals [Line Items]
Cumulative Catch Up Adjustment		30.0	7.3
Wing Systems [Member]
Textuals [Line Items]
Cumulative Catch Up Adjustment		$ 5.4	$ 9.8