Segment Information (Tables)

6 Months Ended

Mar. 30, 2018

Segment Reporting [Abstract]

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

The following tables present total revenues and segment 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 transaction and integration costs (in thousands). Prior period information has been recast to reflect the current period presentation.

	For the Three Months Ended				For the Six Months Ended
	March 30, 2018		March 31, 2017		March 30, 2018		March 31, 2017
Revenues from External Customers:
Aerospace, Technology, Environmental and Nuclear	$	1,105,673	$	602,043	$	1,851,594	$	1,205,228
Buildings, Infrastructure and Advanced Facilities	1,758,412		897,829		2,790,177		1,836,723
Energy, Chemicals and Resources	1,070,943		802,695		2,043,567		1,812,220
Total	$	3,935,028	$	2,302,567	$	6,685,338	$	4,854,171

	For the Three Months Ended						For the Six Months Ended
	March 30, 2018			March 31, 2017			March 30, 2018			March 31, 2017
Segment Operating Profit:
Aerospace, Technology, Environmental and Nuclear (1)	$	61,338		$	44,341		$	127,669		$	94,397
Buildings, Infrastructure and Advanced Facilities (2)	138,017			63,342			201,986			118,690
Energy, Chemicals and Resources	56,328			41,053			102,790			74,314
Total Segment Operating Profit	255,683			148,736			432,445			287,401
Other Corporate Expenses	(35,660		)	(8,338		)	(77,789		)	(26,634		)
Restructuring and Other Charges	(68,885		)	(72,225		)	(88,234		)	(103,966		)
CH2M Transaction Costs	(4,852		)	—			(72,493		)	—
Total U.S. GAAP Operating Profit	146,286			68,173			193,929			156,801
Total Other (Expense) Income, net (3)	(24,119		)	(7,682		)	(29,846		)	(10,430		)
Earnings Before Taxes	$	122,167		$	60,491		$	164,083		$	146,371

(1) Includes $17.3 million in charges during the three and six month periods ended March 30, 2018 associated with a legal matter.

(2) Excludes $22.6 million in restructuring and other charges for the three and six months ended March 31, 2017. See Note 10, Restructuring and Other Charges.

(3) Includes amortization of deferred financing fees related to the CH2M acquisition of $466.0 thousand and $722.0 thousand for the three and six months ended March 30, 2018, respectively.

Schedule of Services Revenues for Reportable Segment

The following tables present total services revenues for each reportable segment for the three and six months ended March 30, 2018 and March 31, 2017 (in thousands).

	For the Three Months Ended								For the Six Months Ended
	March 30, 2018								March 30, 2018
	Aerospace, Technology, Environmental and Nuclear		Buildings, Infrastructure and Advanced Facilities		Energy, Chemicals and Resources		Total		Aerospace, Technology, Environmental and Nuclear		Buildings, Infrastructure and Advanced Facilities		Energy, Chemicals and Resources		Total
Technical Professional Services Revenues
Project Services	$	313,937	$	1,356,998	$	257,615	$	1,928,550	$	573,332	$	2,151,562	$	562,676	$	3,287,570
Process, Scientific, and Systems Consulting	507,229		2,975		6,069		516,273		751,358		4,471		11,517		767,346
Total Technical Professional Services Revenues	821,166		1,359,973		263,684		2,444,823		1,324,690		2,156,033		574,193		4,054,916
Field Services Revenues
Construction	79,473		397,487		507,937		984,897		223,113		632,609		1,002,744		1,858,466
Operations and Maintenance ("O&M")	205,034		952		299,322		505,308		303,791		1,535		466,630		771,956
Total Field Services Revenues	284,507		398,439		807,259		1,490,205		526,904		634,144		1,469,374		2,630,422
	$	1,105,673	$	1,758,412	$	1,070,943	$	3,935,028	$	1,851,594	$	2,790,177	$	2,043,567	$	6,685,338

	For the Three Months Ended								For the Six Months Ended
	March 31, 2017								March 31, 2017
	Aerospace, Technology, Environmental and Nuclear		Buildings, Infrastructure and Advanced Facilities		Energy, Chemicals and Resources		Total		Aerospace, Technology, Environmental and Nuclear		Buildings, Infrastructure and Advanced Facilities		Energy, Chemicals and Resources		Total
Technical Professional Services Revenues
Project Services	$	215,009	$	636,698	$	309,620	$	1,161,327	$	386,861	$	1,287,949	$	544,708	$	2,219,518
Process, Scientific, and Systems Consulting	184,944		4,618		4,887		194,449		384,773		6,331		10,091		401,195
Total Technical Professional Services Revenues	399,953		641,316		314,507		1,355,776		771,634		1,294,280		554,799		2,620,713
Field Services Revenues
Construction	65,648		254,216		402,605		722,469		172,210		535,397		961,809		1,669,416
Operations and Maintenance ("O&M")	136,442		2,297		85,583		224,322		261,384		7,046		295,612		564,042
Total Field Services Revenues	202,090		256,513		488,188		946,791		433,594		542,443		1,257,421		2,233,458
	$	602,043	$	897,829	$	802,695	$	2,302,567	$	1,205,228	$	1,836,723	$	1,812,220	$	4,854,171