Segment Information (Tables)

12 Months Ended

Sep. 29, 2017

Segment Reporting [Abstract]

Schedule of Total Revenues, Operating Profit and Total Asset for Reporting Segment

The following tables present total revenues and operating profit for each reportable segment (in thousands) and includes a reconciliation of segment operating profit to total U.S. GAAP operating profit by including certain corporate-level expenses and expenses relating to the Restructuring and other charges and CH2M professional fees and integration costs (in thousands).

		For the Years Ended
	September 29, 2017		September 30, 2016		October 2, 2015
Revenues from External Customers:
Aerospace & Technology	$	2,360,613	$	2,657,433	$	2,924,753
Buildings & Infrastructure		2,452,321		2,253,512		2,458,379
Industrial		2,743,662		2,793,713		2,517,571
Petroleum & Chemicals		2,466,192		3,259,499		4,214,129
Total	$	10,022,788	$	10,964,157	$	12,114,832

	For the Years Ended
	September 29, 2017			September 30, 2016			October 2, 2015
Operating Profit:
Aerospace & Technology	$	202,595		$	203,808		$	205,368
Buildings & Infrastructure(1)		193,455			174,648			145,299
Industrial		115,262			81,268			126,531
Petroleum & Chemicals		113,858			126,604			138,351
Total Segment Operating Profit		625,170			586,328			615,549
Other Corporate Items		(81,595	)		(60,100	)		(15,739	)
Restructuring and Other Charges		(134,206	)		(187,630	)		(154,283	)
CH2M Professional Fees and Integration    Costs		(17,100	)		—			—
Total U.S. GAAP Operating Profit		392,269			338,598			445,527
Gain (Loss) on disposal of business and    investments		10,880			(41,410	)		(2,909	)
Total Other Expense (2)		(9,932	)		(10,465	)		(12,481	)
Earnings Before Taxes	$	393,217		$	286,723		$	430,137

(1) Excludes $ 23,844 in restructuring and other charges for the fiscal year ended September 29, 2017.

(2) Years ending September 29, 2017 and September 30, 2016 include Restructuring and other charges of $1,233 and $277, respectively.

Schedule of Services Revenues for Reportable Segment

The following tables present total services revenues for each reportable segment for the three years ended September 29, 2017, September 30, 2016 and October 2, 2015 (in thousands):

		For the Year Ended
		September 29, 2017
		Aerospace & Technology	Buildings & Infrastructure		Industrial		Petroleum & Chemicals		Total
Technical Professional Services Revenues
Project Services	$	960,374	$	2,185,220	$	196,171	$	1,464,098	$	4,805,863
Process, Scientific and Systems Consulting		774,063		—		—		31,081		805,144
Total Technical Professional Services    Revenues		1,734,437		2,185,220		196,171		1,495,179		5,611,007
Field Services Revenues
Construction		250,956		254,118		1,901,299		967,888		3,374,261
Operations and Maintenance ("O&M")		375,220		12,983		646,192		3,125		1,037,520
Total Field Services Revenues		626,176		267,101		2,547,491		971,013		4,411,781
Total Revenues	$	2,360,613	$	2,452,321	$	2,743,662	$	2,466,192	$	10,022,788

	For the Year Ended
	September 30, 2016
		Aerospace & Technology	Buildings & Infrastructure		Industrial		Petroleum & Chemicals		Total
Technical Professional Services Revenues
Project Services	$	910,290	$	2,094,282	$	891,018	$	1,843,250	$	5,738,840
Process, Scientific and Systems Consulting		803,654		—		—		48,675		852,329
Total Technical Professional Services    Revenues		1,713,944		2,094,282		891,018		1,891,925		6,591,169
Field Services Revenues
Construction		171,614		119,463		1,601,562		1,366,251		3,258,890
Operations and Maintenance ("O&M")		771,875		39,767		301,133		1,323		1,114,098
Total Field Services Revenues		943,489		159,230		1,902,695		1,367,574		4,372,988
Total Revenues	$	2,657,433	$	2,253,512	$	2,793,713	$	3,259,499	$	10,964,157

Financial Information by Geographic Area

The following table presents certain financial information by geographic area (in thousands):

	For the Years Ended
	September 29, 2017		September 30, 2016		October 2, 2015
Revenues:
United States	$	5,822,843	$	6,247,448	$	7,154,433
Europe		2,262,092		2,346,224		2,074,837
Canada		590,604		927,942		1,065,651
Asia		253,167		299,952		304,393
India		165,295		187,929		163,871
Australia and New Zealand		628,945		436,670		611,271
South America and Mexico		73,456		125,610		143,014
Middle East and Africa		226,386		392,382		597,362
Total	$	10,022,788	$	10,964,157	$	12,114,832
Property, equipment and improvements, net:
United States	$	220,416	$	195,392	$	208,155
Europe		46,108		37,163		55,713
Canada		18,435		21,464		36,647
Asia		2,793		3,069		3,859
India		19,191		13,350		16,264
Australia and New Zealand		18,692		18,888		24,460
South America and Mexico		4,619		5,621		9,127
Middle East and Africa		19,657		24,726		27,013
Total	$	349,911	$	319,673	$	381,238

Revenues Earned Directly or Indirectly from the U.S. Federal Government and its Agencies

The following table presents the revenues earned directly or indirectly from the U.S. federal government and its agencies, expressed as a percentage of total revenues:

For the Years Ended
September 29, 2017		September 30, 2016		October 2, 2015
	19.2%		21.4%		21.7%