Document and Entity Information - shares	9 Months Ended
	Sep. 27, 2018	Oct. 24, 2018
Class Of Stock [Line Items]
Entity Registrant Name	Spirit AeroSystems Holdings, Inc.
Entity Central Index Key	0001364885
Document Type	10-Q
Document Period End Date	Sep. 27, 2018
Document Fiscal Year Focus	2018
Document Fiscal Period Focus	Q3
Current Fiscal Year End Date	--12-31
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Amendment Flag	false
Trading Symbol	SPR
Class A [Member]
Class Of Stock [Line Items]
Entity Common Stock, Shares Outstanding		105,997,678
Class B [Member]
Class Of Stock [Line Items]
Entity Common Stock, Shares Outstanding		0