| Document and Entity Information Document | Nov. 03, 2020 |
| Entity Information [Line Items] | |
| Document Type | 8-K |
| Document Period End Date | Nov. 3, 2020 |
| Entity Registrant Name | MOOG Inc. |
| Entity Incorporation, State or Country Code | NY |
| Entity File Number | 1-05129 |
| Entity Tax Identification Number | 16-0757636 |
| Entity Address, Address Line One | 400 Jamison Rd |
| Entity Address, City or Town | East Aurora, |
| Entity Address, State or Province | NY |
| Entity Address, Postal Zip Code | 14052-0018 |
| City Area Code | 716 |
| Local Phone Number | 652-2000 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | false |
| Entity Central Index Key | 0000067887 |
| Amendment Flag | false |
| Common Class A [Member] | |
| Entity Information [Line Items] | |
| Title of 12(b) Security | Class A common stock |
| Trading Symbol | MOG.A |
| Security Exchange Name | NYSE |
| Common Class B [Member] | |
| Entity Information [Line Items] | |
| Title of 12(b) Security | Class B common stock |
| Trading Symbol | MOG.B |
| Security Exchange Name | NYSE |
