Consolidated Condensed Statements of Shareholders' Equity Statement - 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	Noncontrolling Interest	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
Increase (Decrease) in Stockholders' Equity
Total shareholders' equity	$ 1,214,304
Beginning of period - Moog shareholder's equity, 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			(2,874)		5,325
Equity-based compensation expense			4,394
Adjustment to market - SECT, SERP and other			(7,256)
Net earnings attributable to Moog	55,947			55,947
Dividends				(8,941)
Tax Cuts and Jobs Act, reclassification from AOCIL to retained earnings	(47,077)			47,077				(47,077)
Class A and B shares purchased					(5,210)
Issuance of shares - SECT						1,941
Purchase of shares - SECT	(8,444)					(8,444)
Adjustment to market						6,518	738
Other comprehensive income (loss)								5,825
End of period - Moog shareholder's equity, Amount at Jun. 30, 2018	1,262,267	$ 51,280	$ 486,510	$ 1,941,902	$ (739,042)	$ (89,904)	$ (11,736)	$ (376,743)
Beginning of period - Noncontrolling Interest, Amount at Sep. 30, 2017	0								$ 0
Increase (Decrease) in Stockholders' Equity
Acquisition of noncontrolling interest									485
Net earnings attributable to noncontrolling interest	67								67
Foreign currency translation adjustment	(10,127)								(26)
End of period - Noncontrolling Interest, Amount at Jun. 30, 2018	526								$ 526
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										75,951			(75,951)
End of period - Common Stock at Jun. 30, 2018										43,780,237			7,499,476
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 compensation, shares											83,193			28,460
Class A and B shares purchased, shares											(38,590)			(22,469)
Issuance of shares - SECT												0			21,871
Purchase of shares - SECT												0			(97,855)
End of period, Shares at Jun. 30, 2018											(10,888,400)	(425,148)		(3,327,936)	(730,737)	(150,000)
Increase (Decrease) in Stockholders' Equity
Total shareholders' equity	$ 1,262,793
Common stock outstanding, shares										32,466,689			3,290,803