Restructuring Charges - Summary of 2015 Restructuring Impact on the Reportable Segments (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Apr. 01, 2016	Apr. 01, 2016
Restructuring Charges [Line Items]
Restructuring Charges	$ 35,368	$ 103,751
Operating Segments | Petroleum & Chemicals
Restructuring Charges [Line Items]
Restructuring Charges	29,039	53,015
Operating Segments | Buildings & Infrastructure
Restructuring Charges [Line Items]
Restructuring Charges	601	15,567
Operating Segments | Aerospace & Technology
Restructuring Charges [Line Items]
Restructuring Charges	239	2,435
Operating Segments | Industrial
Restructuring Charges [Line Items]
Restructuring Charges	2,316	19,893
Corporate Non-Segment
Restructuring Charges [Line Items]
Restructuring Charges	$ 3,173	$ 12,841