Consolidated Condensed Statements of Shareholders' Equity Statement - 3 months ended Dec. 30, 2017 - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Treasury Stock At Cost	Stock Employee Compensation Trust (SECT)	Supplemental Retirement Plan (SERP) Trust	Accumulated Other Comprehensive Loss	Class A Common Stock	Class A Common Stock Treasury Stock At Cost	Class A Common Stock Stock Employee Compensation Trust (SECT)	Class B Common Stock	Class B Common Stock Treasury Stock At Cost	Class B Common Stock Stock Employee Compensation Trust (SECT)	Class B Common Stock Supplemental Retirement Plan (SERP) Trust
Beginning of period, Amount at Sep. 30, 2017	$ 1,214,304	$ 51,280	$ 492,246	$ 1,847,819	$ (739,157)	$ (89,919)	$ (12,474)	$ (335,491)
Increase (Decrease) in Stockholders' Equity
Issuance of shares			(1,633)		2,681
Equity-based compensation expense			2,001
Adjustment to market - SECT, SERP and other			6,085
Net earnings attributable to Moog	1,299			1,299
Class A and B shares purchased					(2,734)
Purchase of shares - SECT	(3,823)					(3,823)
Adjustment to market						(5,248)	(837)
Other comprehensive income (loss)	15,854							15,854
End of period, Amount at Dec. 30, 2017	$ 1,227,949	$ 51,280	$ 498,699	$ 1,849,118	$ (739,210)	$ (98,990)	$ (13,311)	$ (319,637)
Beginning of period - Common Stock at Sep. 30, 2017									43,704,286			7,575,427
Increase (Decrease) in Stockholders' Equity
Conversion of Class B to Class A									11,300			(11,300)
End of period - Common Stock at Dec. 30, 2017									43,715,586			7,564,127
Beginning of period, Shares at Sep. 30, 2017										(10,933,003)	(425,148)		(3,333,927)	(654,753)	(150,000)
Increase (Decrease) in Stockholders' Equity
Class A and B shares issued related to equity awards, shares										64,486			5,878
Class A and B shares purchased, shares										(33,020)			(15)
Purchase of shares - SECT											0			(44,662)
End of period, Shares at Dec. 30, 2017										(10,901,537)	(425,148)		(3,328,064)	(699,415)	(150,000)
Increase (Decrease) in Stockholders' Equity
Common stock outstanding, shares									32,388,901			3,386,648