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Document And Entity Information - USD ($)
 6 Months Ended
Apr. 01, 2017
Apr. 24, 2017
Apr. 03, 2016
Document Information      
Entity Registrant Name MOOG INC.    
Entity Central Index Key 0000067887    
Current Fiscal Year End Date --09-30    
Entity Filer Category Large Accelerated Filer    
Document Type 10-Q    
Document Period End Date Apr. 01, 2017    
Document Fiscal Year Focus 2017    
Document Fiscal Period Focus Q2    
Amendment Flag false    
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Public Float     $ 1,462,000,000
Class A Common Stock      
Document Information      
Entity Common Stock, Shares Outstanding   32,278,171  
Entity Listing, Par Value Per Share $ 1.00    
Class B Common Stock      
Document Information      
Entity Common Stock, Shares Outstanding   3,589,482  
Entity Listing, Par Value Per Share $ 1.00