Consolidated Statements Of Shareholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Retained Earnings	Treasury Shares At Cost	Stock Employee Compensation Trust (SECT)	Supplemental Retirement Plan (SERP) Trust	Accumulated Other Comprehensive (Loss) Income	Noncontrolling Interest	Class A Common Stock	Class A Common Stock Treasury Shares At Cost	Class A Common Stock Stock Employee Compensation Trust (SECT)	Class B Common Stock	Class B Common Stock Treasury Shares At Cost	Class B Common Stock Stock Employee Compensation Trust (SECT)	Class B Common Stock Supplemental Retirement Plan (SERP) Trust
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Total shareholders' equity	$ 1,214,304
Beginning of year - Moog shareholder's equity, Amount at Sep. 30, 2017		$ 51,280	$ 492,246	$ 1,849,697	$ (739,157)	$ (89,919)	$ (12,474)	$ (337,369)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of shares			(4,321)		8,881
Equity-based compensation expense			5,804
Redemption of noncontrolling interest			175
Adjustments to market - SECT, SERP and other			8,353
Net earnings attributable to Moog	95,240			95,240
Dividends				(17,889)
Adoption of 606 | Accounting Standards Update 2014-09				0
Class A and B shares purchased					(8,218)
Issuance of shares						4,714	0
Purchase of shares - SECT	(30,358)					(30,358)
Purchase of shares - SERP	(55,000)						(55,000)
Adjustment to market						(2,886)	(5,467)
Other comprehensive income (loss)	11,624							11,654
Tax Cuts and Jobs Act, reclassification to retained earnings	(47,077)			47,077				(47,077)
End of year - Moog shareholder's equity, Amount at Sep. 29, 2018	1,224,986	51,280	502,257	1,974,125	(738,494)	(118,449)	(72,941)	(372,792)
Beginning of year - Noncontrolling Interest, Amount at Sep. 30, 2017									$ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Noncontrolling interest of acquired entity									1,927
Net earnings attributable to noncontrolling interest	121								121
Foreign currency translation adjustment	(16,279)								(30)
Acquisition of noncontrolling interest									(2,018)
End of year - Noncontrolling Interest, Amount at Sep. 29, 2018									0
Beginning of year - Common stock at Sep. 30, 2017										43,704,286			7,575,427
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Conversion of Class B to Class A										80,203			(80,203)
End of year - Common stock at Sep. 29, 2018										43,784,489			7,495,224
Beginning of year - Shares at Sep. 30, 2017											(10,933,003)	(425,148)		(3,333,927)	(654,753)	(150,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares issued related to equity awards											104,842			64,664
Shares purchased											(44,414)			(54,733)
Shares issued															57,277	0
Purchase of shares - SECT															(386,296)
Purchase of shares - SERP																(726,170)
End of year - Shares at Sep. 29, 2018											(10,872,575)	(425,148)		(3,323,996)	(983,772)	(876,170)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Total shareholders' equity	1,224,986
Issuance of shares			(1,018)		9,880
Equity-based compensation expense			6,464
Redemption of noncontrolling interest			0
Adjustments to market - SECT, SERP and other			2,843
Net earnings attributable to Moog	174,548			174,548
Dividends				(34,857)
Adoption of 606 | Accounting Standards Update 2014-09				14,923
Class A and B shares purchased					(40,955)
Issuance of shares						22,190	4,293
Purchase of shares - SECT	(15,288)					(15,288)
Purchase of shares - SERP	0						0
Adjustment to market						55	(2,898)
Other comprehensive income (loss)	(42,685)							(42,685)
Tax Cuts and Jobs Act, reclassification to retained earnings	0			0				0
End of year - Moog shareholder's equity, Amount at Sep. 28, 2019	1,322,481	51,280	510,546	2,128,739	(769,569)	(111,492)	(71,546)	(415,477)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Noncontrolling interest of acquired entity									0
Net earnings attributable to noncontrolling interest	0								0
Foreign currency translation adjustment	(29,984)								0
Acquisition of noncontrolling interest									0
End of year - Noncontrolling Interest, Amount at Sep. 28, 2019									0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Conversion of Class B to Class A										10,446			(10,446)
End of year - Common stock at Sep. 28, 2019										43,794,935			7,484,778
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares issued related to equity awards											109,005			148,017
Shares purchased											(337,942)			(169,510)
Shares issued															270,675	50,000
Purchase of shares - SECT															(173,203)
Purchase of shares - SERP																0
End of year - Shares at Sep. 28, 2019											(11,101,512)	(425,148)		(3,345,489)	(886,300)	(826,170)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Total shareholders' equity	1,322,481
Issuance of shares			142		11,887
Equity-based compensation expense			5,661
Redemption of noncontrolling interest			0
Adjustments to market - SECT, SERP and other			(43,704)
Net earnings attributable to Moog	9,205			9,205
Dividends				(25,210)
Adoption of 606 | Accounting Standards Update 2014-09				0
Class A and B shares purchased					(233,101)
Issuance of shares						28,768	0
Purchase of shares - SECT	(6,774)					(6,774)
Purchase of shares - SERP	0						0
Adjustment to market						25,256	18,448
Other comprehensive income (loss)	130,024							130,024
Tax Cuts and Jobs Act, reclassification to retained earnings	0			0				0
End of year - Moog shareholder's equity, Amount at Oct. 03, 2020	1,243,083	$ 51,280	$ 472,645	$ 2,112,734	$ (990,783)	$ (64,242)	$ (53,098)	$ (285,453)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Noncontrolling interest of acquired entity									0
Net earnings attributable to noncontrolling interest	0								0
Foreign currency translation adjustment	26,405								0
Acquisition of noncontrolling interest									0
End of year - Noncontrolling Interest, Amount at Oct. 03, 2020									$ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Conversion of Class B to Class A										4,294			(4,294)
End of year - Common stock at Oct. 03, 2020										43,799,229			7,480,484
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares issued related to equity awards											31,943			215,040
Shares purchased											(2,890,429)			(214,428)
Shares issued															408,641	0
Purchase of shares - SECT															(79,884)
Purchase of shares - SERP																0
End of year - Shares at Oct. 03, 2020											(13,959,998)	(425,148)		(3,344,877)	(557,543)	(826,170)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Total shareholders' equity	$ 1,243,083