Quarterly Data - Unaudited Net Sales And Earnings (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Sep. 29, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 30, 2017	Sep. 30, 2017	Jul. 01, 2017	Apr. 01, 2017	Dec. 31, 2016	Sep. 29, 2018	Sep. 30, 2017	Oct. 01, 2016
Quarterly Financial Data [Abstract]
Net sales	$ 700,866	$ 692,018	$ 689,049	$ 627,535	$ 649,268	$ 626,183	$ 632,403	$ 589,670	$ 2,709,468	$ 2,497,524	$ 2,411,937
Gross profit	198,843	197,386	192,649	184,109	191,522	182,414	185,080	172,506	772,987	731,522	711,583
Net earnings attributable to Moog	$ 40,560	$ 40,683	$ 13,965	$ 1,299	$ 38,602	$ 40,088	$ 32,026	$ 30,564	$ 96,507	$ 141,280	$ 126,745
Net earnings per share attributable to Moog, Basic	$ 1.15	$ 1.14	$ 0.39	$ 0.04	$ 1.08	$ 1.12	$ 0.89	$ 0.85	$ 2.71	$ 3.94	$ 3.49
Net earnings per share attributable to Moog, Diluted	$ 1.14	$ 1.13	$ 0.39	$ 0.04	$ 1.07	$ 1.11	$ 0.88	$ 0.84	$ 2.68	$ 3.90	$ 3.47