Restructuring and Other Charges - Summary of 2015 Restructuring Impacts on Reportable Segment Income by Line of Business (Details) - USD ($) $ in Thousands	3 Months Ended									12 Months Ended
	Sep. 30, 2016	Jul. 01, 2016	Apr. 01, 2016	Jan. 01, 2016	Oct. 02, 2015	Jun. 26, 2015	Mar. 27, 2015	Sep. 26, 2014	Jun. 27, 2014	Sep. 29, 2017	Sep. 30, 2016	Oct. 02, 2015	Sep. 26, 2014
Restructuring Charges [Line Items]
Restructuring Charges	$ 36,000	$ 25,800	$ 25,700	$ 48,100	$ 68,200	$ 30,100	$ 9,600	$ 30,400	$ 47,000	$ 98,688	$ 187,907	$ 157,192	$ 93,300
Operating Segments | Aerospace & Technology
Restructuring Charges [Line Items]
Restructuring Charges										1,820	5,835
Operating Segments | Buildings & Infrastructure
Restructuring Charges [Line Items]
Restructuring Charges										23,675	23,378
Operating Segments | Industrial
Restructuring Charges [Line Items]
Restructuring Charges										6,698	29,690
Operating Segments | Petroleum & Chemicals
Restructuring Charges [Line Items]
Restructuring Charges										36,664	87,188
Corporate Non-Segment
Restructuring Charges [Line Items]
Restructuring Charges										$ 29,831	$ 41,816