Segments (Sales by Revenue Recognition Method) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 28, 2026	Mar. 29, 2025	Mar. 28, 2026	Mar. 29, 2025
Segment Reporting
Net sales	$ 1,051,947	$ 934,022	$ 2,152,293	$ 1,841,904
Transferred over time
Segment Reporting
Net sales	685,269	606,864	1,411,644	1,194,979
Transferred at point in time
Segment Reporting
Net sales	366,678	327,158	740,649	646,925
Space And Defense
Segment Reporting
Net sales	313,593	270,184	637,871	517,968
Space And Defense | Transferred over time
Segment Reporting
Net sales	279,637	242,650	563,716	466,032
Space And Defense | Transferred at point in time
Segment Reporting
Net sales	33,956	27,534	74,155	51,936
Military Aircraft
Segment Reporting
Net sales	235,489	213,849	482,900	427,269
Military Aircraft | Transferred over time
Segment Reporting
Net sales	201,275	181,079	415,077	357,633
Military Aircraft | Transferred at point in time
Segment Reporting
Net sales	34,214	32,770	67,823	69,636
Commercial Aircraft
Segment Reporting
Net sales	247,007	215,563	514,850	434,053
Commercial Aircraft | Transferred over time
Segment Reporting
Net sales	182,592	154,862	388,224	316,074
Commercial Aircraft | Transferred at point in time
Segment Reporting
Net sales	64,415	60,701	126,626	117,979
Industrial
Segment Reporting
Net sales	255,858	234,426	516,672	462,614
Industrial | Transferred over time
Segment Reporting
Net sales	21,765	28,273	44,627	55,240
Industrial | Transferred at point in time
Segment Reporting
Net sales	$ 234,093	$ 206,153	$ 472,045	$ 407,374