Segment Information - Schedule of Total Revenues, Operating Profit and Total Asset for Reporting Segment (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2017	Apr. 01, 2016	Mar. 31, 2017	Apr. 01, 2016
Segment Reporting Information [Line Items]
Revenues from External Customers	$ 2,302,567	$ 2,781,763	$ 4,854,171	$ 5,629,697
Total Operating Profit	68,173	86,781	156,801	146,231
Restructuring and Other Charges	(72,225)	(35,368)	(103,966)	(103,751)
Total Other (Expense) income	(6,449)	3,675	(9,197)	2,012
Total Other (Expense) income - Restructuring	(1,233)		(1,233)
Earnings Before Taxes	60,491	90,456	146,371	148,243
Operating Segments
Segment Reporting Information [Line Items]
Total Operating Profit	148,736	140,946	287,401	288,355
Corporate Non-Segment
Segment Reporting Information [Line Items]
Other Corporate Expenses	(8,338)	(18,797)	(26,634)	(38,373)
Petroleum & Chemicals
Segment Reporting Information [Line Items]
Revenues from External Customers	557,827	866,615	1,199,640	1,808,928
Petroleum & Chemicals | Operating Segments
Segment Reporting Information [Line Items]
Total Operating Profit	35,619	30,945	59,271	62,548
Aerospace & Technology
Segment Reporting Information [Line Items]
Revenues from External Customers	577,040	669,464	1,154,476	1,339,655
Aerospace & Technology | Operating Segments
Segment Reporting Information [Line Items]
Total Operating Profit	45,057	55,121	96,144	103,120
Buildings & Infrastructure
Segment Reporting Information [Line Items]
Revenues from External Customers	585,242	579,128	1,165,859	1,142,458
Buildings & Infrastructure | Operating Segments
Segment Reporting Information [Line Items]
Total Operating Profit	43,987	42,463	82,784	82,915
Industrial
Segment Reporting Information [Line Items]
Revenues from External Customers	582,458	666,556	1,334,196	1,338,656
Industrial | Operating Segments
Segment Reporting Information [Line Items]
Total Operating Profit	$ 24,073	$ 12,417	$ 49,202	$ 39,772