| Cover | Sep. 28, 2021 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Sep. 28, 2021 |
| Current Fiscal Year End Date | --12-31 |
| Entity File Number | 001-33160 |
| Entity Registrant Name | Spirit AeroSystems Holdings, Inc. |
| Entity Central Index Key | 0001364885 |
| Entity Tax Identification Number | 20-2436320 |
| Entity Incorporation, State or Country Code | DE |
| Entity Address, Address Line One | 3801 South Oliver |
| Entity Address, City or Town | Wichita |
| Entity Address, State or Province | KS |
| Entity Address, Postal Zip Code | 67210 |
| City Area Code | 316 |
| Local Phone Number | 526-9000 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Class A Common Stock, par value $0.01 per share |
| Trading Symbol | SPR |
| Security Exchange Name | NYSE |
| Entity Emerging Growth Company | false |
