Summary Of Significant Accounting Policies Impact of Change in Accounting Principle on Consolidated Condensed Statement of Earnings (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Oct. 03, 2020	Jun. 27, 2020	Mar. 28, 2020	Dec. 28, 2019	Sep. 28, 2019	Jun. 29, 2019	Mar. 30, 2019	Dec. 29, 2018	Oct. 03, 2020	Sep. 28, 2019	Sep. 29, 2018
New Accounting Pronouncements or Change in Accounting Principle
Other									$ 20,707	$ 18,505	$ 8,608
Earnings before income taxes									5,417	226,952	182,179
Income Tax Expense (Benefit)									(3,788)	52,404	86,818
Net earnings attributable to Moog and noncontrolling interest									9,205	174,548	95,361
Net earnings attributable to Moog	$ (77,977)	$ (12,590)	$ 49,745	$ 50,027	$ 44,555	$ 46,165	$ 41,059	$ 42,769	$ 9,205	$ 174,548	$ 95,240
Net earnings (loss) per share attributable to Moog, Basic	$ (2.40)	$ (0.39)	$ 1.49	$ 1.45	$ 1.28	$ 1.32	$ 1.18	$ 1.23	$ 0.28	$ 5.01	$ 2.67
Net earnings (loss) per share attributable to Moog, Diluted	$ (2.40)	$ (0.39)	$ 1.48	$ 1.44	$ 1.27	$ 1.31	$ 1.17	$ 1.22	$ 0.28	$ 4.96	$ 2.64
Retirement liability adjustment									$ 102,081	$ (12,806)	$ 28,024
Other Comprehensive Income (Loss), Net of Tax									130,024	(42,685)	11,624
Comprehensive income (loss)									139,229	131,863	59,908
Comprehensive income (loss) attributable to Moog									139,229	131,863	59,817
Previously Reported
New Accounting Pronouncements or Change in Accounting Principle
Other										11,699	6,950
Earnings before income taxes										233,758	183,837
Income Tax Expense (Benefit)										54,010	87,209
Net earnings attributable to Moog and noncontrolling interest										179,748	96,628
Net earnings attributable to Moog										$ 179,748	$ 96,507
Net earnings (loss) per share attributable to Moog, Basic										$ 5.16	$ 2.71
Net earnings (loss) per share attributable to Moog, Diluted										$ 5.11	$ 2.68
Retirement liability adjustment										$ (18,006)	$ 26,757
Other Comprehensive Income (Loss), Net of Tax										(47,885)	10,357
Comprehensive income (loss)										131,863	59,908
Comprehensive income (loss) attributable to Moog										131,863	59,817
Restatement Adjustment
New Accounting Pronouncements or Change in Accounting Principle
Other									11,502	6,806	1,658
Earnings before income taxes									(11,502)	(6,806)	(1,658)
Income Tax Expense (Benefit)									(2,714)	(1,606)	(391)
Net earnings attributable to Moog and noncontrolling interest									(8,788)	(5,200)	(1,267)
Net earnings attributable to Moog									$ (8,788)	$ (5,200)	$ (1,267)
Net earnings (loss) per share attributable to Moog, Basic									$ (0.27)	$ (0.15)	$ (0.04)
Net earnings (loss) per share attributable to Moog, Diluted									$ (0.27)	$ (0.15)	$ (0.04)
Retirement liability adjustment									$ 8,788	$ 5,200	$ 1,267
Other Comprehensive Income (Loss), Net of Tax									8,788	5,200	1,267
Comprehensive income (loss)									0	0	0
Comprehensive income (loss) attributable to Moog									0	$ 0	$ 0
Previous Accounting Guidance
New Accounting Pronouncements or Change in Accounting Principle
Other									32,209
Earnings before income taxes									(6,085)
Income Tax Expense (Benefit)									(6,502)
Net earnings attributable to Moog and noncontrolling interest									417
Net earnings attributable to Moog									$ 417
Net earnings (loss) per share attributable to Moog, Basic									$ 0.01
Net earnings (loss) per share attributable to Moog, Diluted									$ 0.01
Retirement liability adjustment									$ 110,869
Other Comprehensive Income (Loss), Net of Tax									138,812
Comprehensive income (loss)									139,229
Comprehensive income (loss) attributable to Moog									$ 139,229