Document and Entity Information (USD $)	12 Months Ended
	Dec. 31, 2012	Feb. 22, 2013 Class A [Member]	Feb. 22, 2013 Class B
Class Of Stock [Line Items]
Entity Common Stock, Shares Outstanding		119,612,407	24,025,880
Entity Registrant Name	Spirit AeroSystems Holdings, Inc.
Entity Central Index Key	0001364885
Document Type	10-K
Document Period End Date	Dec. 31, 2012
Amendment Flag	false
Document Fiscal Year Focus	2012
Document Fiscal Period Focus	FY
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Entity Public Float	$ 2,825,306,867
Trading Symbol	SPR