Revenue Accounting for Contracts - Schedule of Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 27, 2025	Jun. 28, 2024	Jun. 27, 2025	Jun. 28, 2024
Disaggregation of Revenue [Line Items]
Revenues	$ 3,031,768	$ 2,883,384	$ 8,875,139	$ 8,540,791
United States
Disaggregation of Revenue [Line Items]
Revenues	1,862,762	1,809,939	5,471,774	5,316,903
Europe
Disaggregation of Revenue [Line Items]
Revenues	726,478	671,375	2,136,581	2,026,806
Canada
Disaggregation of Revenue [Line Items]
Revenues	66,341	66,849	180,491	191,392
Asia
Disaggregation of Revenue [Line Items]
Revenues	36,827	31,619	105,599	96,379
India
Disaggregation of Revenue [Line Items]
Revenues	50,691	37,946	132,138	110,963
Australia and New Zealand
Disaggregation of Revenue [Line Items]
Revenues	139,696	135,228	410,239	407,215
Middle East and Africa
Disaggregation of Revenue [Line Items]
Revenues	$ 148,973	$ 130,428	$ 438,317	$ 391,133