Document And Entity Information - USD ($)	6 Months Ended
	Mar. 31, 2018	Apr. 24, 2018	Apr. 02, 2017
Document Information
Entity Registrant Name	MOOG INC.
Entity Central Index Key	0000067887
Current Fiscal Year End Date	--09-29
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Document Period End Date	Mar. 31, 2018
Document Fiscal Year Focus	2018
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			$ 2,212,000,000
Class A Common Stock
Document Information
Entity Common Stock, Shares Outstanding		32,441,477
Entity Listing, Par Value Per Share	$ 1.00
Class B Common Stock
Document Information
Entity Common Stock, Shares Outstanding		3,321,143
Entity Listing, Par Value Per Share	$ 1.00