Other Financial Information Other Financial Information (Components of Accrued Liabilities) (Details) - USD ($) $ in Thousands	Oct. 02, 2020	Sep. 27, 2019
Other Financial Information [Abstract]
Accrued payroll and related liabilities	$ 746,637	$ 677,313
Project-related accruals	60,531	58,835
Non project-related accruals	237,204	258,312
Insurance liabilities	75,267	83,968
Sales and other similar taxes	104,720	34,390
Deferred rent	0	68,914
Dividends payable	25,524	23,439
Deferred gain on ECR disposition	0	179,208
Current liabilities held for sale	0	2,573
Total	$ 1,249,883	$ 1,386,952