Fluor (FLR) 10-Q30 Apr 152015 Q1 Quarterly reportFinancial data

Company Profile

Document_and_Entity_Informatio

Document and Entity Information	3 Months Ended
Document and Entity Information	Mar. 31, 2015	Apr. 24, 2015
Document and Entity Information
Entity Registrant Name	FLUOR CORP
Entity Central Index Key	1124198
Document Type	10-Q
Document Period End Date	31-Mar-15
Amendment Flag	FALSE
Current Fiscal Year End Date	-19
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		146,572,661
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	Q1

CONDENSED_CONSOLIDATED_STATEME

CONDENSED CONSOLIDATED STATEMENT OF EARNINGS (USD $)	3 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
CONDENSED CONSOLIDATED STATEMENT OF EARNINGS
TOTAL REVENUE	$4,548,649	$5,384,636
TOTAL COST OF REVENUE	4,251,189	5,072,304
OTHER (INCOME) AND EXPENSES
Corporate general and administrative expense	41,110	37,773
Interest expense	12,168	6,897
Interest income	-4,696	-3,806
Total cost and expenses	4,299,771	5,113,168
EARNINGS BEFORE TAXES	248,878	271,468
INCOME TAX EXPENSE	83,274	78,158
NET EARNINGS	165,604	193,310
LESS: NET EARNINGS ATTRIBUTABLE TO NONCONTROLLING INTERESTS	21,525	44,236
NET EARNINGS ATTRIBUTABLE TO FLUOR CORPORATION	$144,079	$149,074
BASIC EARNINGS PER SHARE	$0.98	$0.93
DILUTED EARNINGS PER SHARE	$0.96	$0.92
SHARES USED TO CALCULATE EARNINGS PER SHARE
BASIC (in shares)	147,731	160,213
DILUTED (in shares)	149,915	162,360
DIVIDENDS DECLARED PER SHARE (in dollars per share)	$0.21	$0.21

CONDENSED_CONSOLIDATED_STATEME1

CONDENSED CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
CONDENSED CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME
NET EARNINGS	$165,604	$193,310
OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX:
Foreign currency translation adjustment	-48,724	-12,729
Ownership share of equity method investees' other comprehensive loss	-4,481	-1,998
Defined benefit pension and postretirement plan adjustments	2,688	1,648
Unrealized gain (loss) on derivative contracts	894	-429
Unrealized gain (loss) on available-for-sale securities	609	-18
TOTAL OTHER COMPREHENSIVE LOSS, NET OF TAX	-49,014	-13,526
COMPREHENSIVE INCOME	116,590	179,784
LESS: COMPREHENSIVE INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	22,116	39,897
COMPREHENSIVE INCOME ATTRIBUTABLE TO FLUOR CORPORATION	$94,474	$139,887

CONDENSED_CONSOLIDATED_BALANCE

CONDENSED CONSOLIDATED BALANCE SHEET (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
CURRENT ASSETS
Cash and cash equivalents ($342,823 and $352,996 related to variable interest entities ("VIE"))	$1,811,293	$1,993,125
Marketable securities, current ($70,065 and $14,082 related to VIEs)	145,568	105,131
Accounts and notes receivable, net ($209,058 and $193,565 related to VIEs)	1,256,292	1,471,705
Contract work in progress ($200,180 and $166,334 related to VIEs)	1,486,943	1,587,275
Deferred taxes	320,147	340,223
Other current assets ($27,868 and $38,848 related to VIEs)	359,010	260,588
Total current assets	5,379,253	5,758,047
Marketable securities, noncurrent	254,761	343,644
Property, plant and equipment ("PP&E") ((net of accumulated depreciation of $1,071,024 and $1,081,198) (net PP&E of $81,181 and $77,579 related to VIEs))	965,935	980,263
Investments and goodwill	335,986	302,757
Deferred taxes	106,049	201,004
Deferred compensation trusts	371,418	405,022
Other ($24,796 and $24,003 related to VIEs)	205,794	203,692
TOTAL ASSETS	7,619,196	8,194,429
CURRENT LIABILITIES
Trade accounts payable ($202,316 and $213,837 related to VIEs)	1,251,950	1,422,084
Convertible senior notes and other borrowings	27,738	28,742
Advance billings on contracts ($188,732 and $151,321 related to VIEs)	586,020	569,418
Accrued salaries, wages and benefits ($51,113 and $51,749 related to VIEs)	697,174	725,586
Other accrued liabilities ($26,130 and $21,709 related to VIEs)	256,814	585,023
Total current liabilities	2,819,696	3,330,853
LONG-TERM DEBT DUE AFTER ONE YEAR	992,231	991,685
NONCURRENT LIABILITIES	606,013	648,061
CONTINGENCIES AND COMMITMENTS
Capital stock
Preferred - authorized 20,000,000 shares ($0.01 par value); none issued
Common - authorized 375,000,000 shares ($0.01 par value); issued and outstanding - 146,976,144 and 148,633,640 shares in 2015 and 2014, respectively	1,470	1,486
Accumulated other comprehensive loss	-533,817	-484,212
Retained earnings	3,601,071	3,593,597
Total shareholders' equity	3,068,724	3,110,871
Noncontrolling interests	132,532	112,959
Total equity	3,201,256	3,223,830
TOTAL LIABILITIES AND EQUITY	$7,619,196	$8,194,429

CONDENSED_CONSOLIDATED_BALANCE1

CONDENSED CONSOLIDATED BALANCE SHEET (Parenthetical) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, except Share data, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
CONDENSED CONSOLIDATED BALANCE SHEET
Property, plant and equipment, accumulated depreciation	$1,071,024	$1,081,198
Shareholders' equity
Preferred stock, authorized shares (in shares)	20,000,000	20,000,000
Preferred stock, par value (in dollars per share)	$0.01	$0.01
Preferred stock, issued shares (in shares)	0	0
Common stock, authorized shares (in shares)	375,000,000	375,000,000
Common stock, par value (in dollars per share)	$0.01	$0.01
Common stock, issued shares (in shares)	146,976,144	148,633,640
Common stock, outstanding shares (in shares)	146,976,144	148,633,640
CURRENT ASSETS, VIEs
Cash and cash equivalents	1,811,293	1,993,125
Marketable securities, current	145,568	105,131
Accounts and notes receivable	1,256,292	1,471,705
Contract work in progress	1,486,943	1,587,275
Other current assets	359,010	260,588
Net property, plant and equipment	965,935	980,263
Other	205,794	203,692
CURRENT LIABILITIES, VIEs
Trade accounts payable	1,251,950	1,422,084
Advance billings on contracts	586,020	569,418
Accrued salaries, wages and benefits	697,174	725,586
Other accrued liabilities	256,814	585,023
Consolidated variable interest entities
CURRENT ASSETS, VIEs
Cash and cash equivalents	342,823	352,996
Marketable securities, current	70,065	14,082
Accounts and notes receivable	209,058	193,565
Contract work in progress	200,180	166,334
Other current assets	27,868	38,848
Net property, plant and equipment	81,181	77,579
Other	24,796	24,003
CURRENT LIABILITIES, VIEs
Trade accounts payable	202,316	213,837
Advance billings on contracts	188,732	151,321
Accrued salaries, wages and benefits	51,113	51,749
Other accrued liabilities	$26,130	$21,709

CONDENSED_CONSOLIDATED_STATEME2

CONDENSED CONSOLIDATED STATEMENT OF CASH FLOWS (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
CASH FLOWS FROM OPERATING ACTIVITIES
Net earnings	$165,604	$193,310
Adjustments to reconcile net earnings to cash provided (utilized) by operating activities:
Depreciation of fixed assets	47,803	48,492
Amortization of intangibles	223	223
(Earnings) loss from equity method investments, net of distributions	-7,386	2,784
Gain on sale of property, plant and equipment	-8,841	-5,108
Restricted stock and stock option amortization	12,546	10,792
Deferred compensation trust	33,604	-1,946
Deferred compensation obligation	6,164	4,649
Deferred taxes	143,601	23,605
Excess tax benefit from stock-based plans	867	-3,115
Net retirement plan accrual (contributions)	3,391	-7,306
Changes in operating assets and liabilities	-52,775	-76,456
Cash outflows from discontinued operations	-306,490
Other items	971	-3,210
Cash provided by operating activities	39,282	186,714
CASH FLOWS FROM INVESTING ACTIVITIES
Purchases of marketable securities	-147,068	-134,264
Proceeds from the sales and maturities of marketable securities	194,635	88,643
Capital expenditures	-73,883	-66,628
Proceeds from disposal of property, plant and equipment	29,905	24,557
Investments in partnerships and joint ventures	-21,537	-4,978
Other items	-197	-1,070
Cash utilized by investing activities	-18,145	-93,740
CASH FLOWS FROM FINANCING ACTIVITIES
Repurchase of common stock	-111,658	-192,301
Dividends paid	-32,363	-25,966
Distributions paid to noncontrolling interests	-3,508	-15,898
Capital contributions by noncontrolling interests	698	46
Taxes paid on vested restricted stock	-7,588	-9,979
Stock options exercised	923	14,070
Excess tax benefit from stock-based plans	-867	3,115
Other items	393	1,896
Cash utilized by financing activities	-153,970	-225,017
Effect of exchange rate changes on cash	-48,999	-9,481
Decrease in cash and cash equivalents	-181,832	-141,524
Cash and cash equivalents at beginning of period	1,993,125	2,283,582
Cash and cash equivalents at end of period	$1,811,293	$2,142,058

Principles_of_Consolidation

Principles of Consolidation	3 Months Ended
Principles of Consolidation	Mar. 31, 2015
Principles of Consolidation
Principles of Consolidation	(1)Principles of Consolidation

	The Condensed Consolidated Financial Statements do not include footnotes and certain financial information normally presented annually under accounting principles generally accepted in the United States and, therefore, should be read in conjunction with the company’s December 31, 2014 Annual Report on Form 10-K. Accounting measurements at interim dates inherently involve greater reliance on estimates than at year-end. The results of operations for the three months ended March 31, 2015 may not necessarily be indicative of results that can be expected for the full year.

	The Condensed Consolidated Financial Statements included herein are unaudited; however, they contain all adjustments of a normal recurring nature which, in the opinion of management, are necessary to present fairly its consolidated financial position as of March 31, 2015 and its consolidated results of operations and cash flows for the interim periods presented. All significant intercompany transactions of consolidated subsidiaries are eliminated. Certain amounts in 2014 have been reclassified to conform to the 2015 presentation. Management has evaluated all material events occurring subsequent to the date of the financial statements up to the filing date of this Form 10-Q.

Recent_Accounting_Pronouncemen

Recent Accounting Pronouncements	3 Months Ended
Recent Accounting Pronouncements	Mar. 31, 2015
Recent Accounting Pronouncements
Recent Accounting Pronouncements	(2)Recent Accounting Pronouncements

	New accounting pronouncements implemented by the company during the first quarter of 2015 or requiring implementation in future periods are discussed below or elsewhere in the notes, where appropriate.

	In the first quarter of 2015, the company adopted Accounting Standards Update (“ASU”) 2014-11, “Repurchase-to-Maturity Transactions, Repurchase Financings, and Disclosures,” which makes limited amendments to the guidance in Accounting Standards Codification (“ASC”) 860, “Transfers and Servicing,” on accounting for certain repurchase agreements (“repos”). The ASU (1) requires entities to account for repurchase-to-maturity transactions as secured borrowings (rather than as sales with forward repurchase agreements); (2) eliminates accounting guidance on linked repurchase financing transactions; and (3) expands disclosure requirements related to certain transfers of financial assets that are accounted for as sales and certain transfers (specifically, repos, securities lending transactions and repurchase-to-maturity transactions) accounted for as secured borrowings. The adoption of ASU 2014-11 did not have a material impact on the company’s financial position, results of operations or cash flows.

	In the first of 2015, the company adopted ASU 2014-08, “Reporting Discontinued Operations and Disclosures of Disposals of Components of an Entity,” which amends the definition of a discontinued operation and requires entities to provide additional disclosures about disposal transactions that do not meet the discontinued operations criteria. This ASU requires discontinued operations treatment for disposals of a component or group of components of an entity that represent a strategic shift that has or will have a major impact on an entity’s operations or financial results. ASU 2014-08 also expands the scope of ASC 205-20, “Discontinued Operations,” to disposals of equity method investments and acquired businesses held for sale. The adoption of ASU 2014-08 did not have a material impact on the company’s financial position, results of operations or cash flows.

	In the first quarter of 2015, the company adopted ASU 2014-05, “Service Concession Arrangements.” This ASU clarifies that, unless certain circumstances are met, operating entities should not account for certain concession arrangements with public-sector entities as leases and should not recognize the related infrastructure as property, plant and equipment. The adoption of ASU 2014-05 did not have a material impact on the company’s financial position, results of operations or cash flows.

	In April 2015, the Financial Accounting Standards Board (“FASB”) issued ASU 2015-05, “Customer’s Accounting for Fees Paid in a Cloud Computing Arrangement.” This ASU clarifies the circumstances under which a cloud computing customer would account for the arrangement as a license of internal-use software. ASU 2015-05 is effective for interim and annual reporting periods beginning after December 15, 2015. Management does not expect the adoption of ASU 2015-05 to have a material impact on the company’s financial position, result of operations or cash flows.

	In April 2015, the FASB issued ASU 2015-03, “Simplifying the Presentation of Debt Issuance Costs.” This ASU changes the presentation of debt issuance costs on the balance sheet by requiring entities to present such costs as a direct deduction from the related debt liability rather than as an asset. ASU 2015-03 is effective for interim and annual reporting periods beginning after December 15, 2015. Management does not expect the adoption of ASU 2015-03 to have a material impact on the company’s financial position, results of operations or cash flows.

	In February 2015, the FASB issued ASU 2015-02, “Amendments to the Consolidation Analysis.” This ASU amends the consolidation guidance for VIEs and general partners’ investments in limited partnerships and modifies the evaluation of whether limited partnerships and similar legal entities are VIEs or voting interest entities. ASU 2015-02 is effective for interim and annual reporting periods beginning after December 15, 2015. Management does not expect the adoption of ASU 2015-02 to have a material impact on the company’s financial position, results of operations or cash flows.

	In January 2015, the FASB issued ASU 2015-01, “Simplifying Income Statement Presentation by Eliminating the Concept of Extraordinary Items.” Under this ASU, an entity will no longer be allowed to separately disclose extraordinary items, net of tax, in the income statement after income from continuing operations if an event or transaction is unusual in nature and occurs infrequently. ASU 2015-01 is effective for interim and annual reporting periods beginning after December 15, 2015 with early adoption permitted. Upon adoption, the company may elect prospective or retrospective application. Management does not expect the adoption of ASU 2015-01 to have a material impact on the company’s financial position, results of operations or cash flows.

	In August 2014, the FASB issued ASU 2014-15, “Disclosure of Uncertainties about an Entity’s Ability to Continue as a Going Concern.” This ASU requires management to perform interim and annual assessments of an entity’s ability to continue as a going concern within one year of the date the financial statements are issued and to provide certain disclosures if conditions or events raise substantial doubt about the entity’s ability to continue as a going concern. ASU 2014-15 is effective for annual reporting periods ending after December 15, 2016 and subsequent interim reporting periods. The adoption of ASU 2014-15 will not have any impact on the company’s financial position, results of operations or cash flows.

	In June 2014, the FASB issued ASU 2014-12, “Accounting for Share-Based Payments When the Terms of an Award Provide That a Performance Target Could Be Achieved After the Requisite Service Period.” This ASU requires that a performance target that affects vesting, and that could be achieved after the requisite service period, be treated as a performance condition. ASU 2014-12 is effective for interim and annual reporting periods beginning after December 15, 2015. Management does not expect the adoption of ASU 2014-12 to have a material impact on the company’s financial position, results of operations or cash flows.

	In May 2014, the FASB issued ASU 2014-09, “Revenue from Contracts with Customers,” which outlines a single comprehensive model for entities to use in accounting for revenue arising from contracts with customers and supersedes most current revenue recognition guidance, including industry-specific guidance. ASU 2014-09 outlines a five-step process for revenue recognition that focuses on transfer of control, as opposed to transfer of risk and rewards, and also requires enhanced disclosures regarding the nature, amount, timing and uncertainty of revenues and cash flows from contracts with customers. Major provisions include determining which goods and services are distinct and require separate accounting, how variable consideration (which may include change orders and claims) is recognized, whether revenue should be recognized at a point in time or over time and ensuring the time value of money is considered in the transaction price. This ASU is currently effective for interim and annual reporting periods beginning after December 15, 2016 and can be applied either retrospectively to each prior period presented or as a cumulative-effect adjustment as of the date of adoption. Management is currently evaluating the impact of adopting ASU 2014-09 on the company’s financial position, results of operations and cash flows.

Other_Comprehensive_Income_Los

Other Comprehensive Income (Loss)	3 Months Ended
Other Comprehensive Income (Loss)	Mar. 31, 2015
Other Comprehensive Income (Loss)
Other Comprehensive Income (Loss)

	(3)Other Comprehensive Income (Loss)

	The tax effects of the components of other comprehensive income (loss) (“OCI”) are as follows:

			Three Months Ended									Three Months Ended
			March 31, 2015									March 31, 2014
						Tax									Tax
			Before-Tax			Benefit			Net-of-Tax			Before-Tax			Benefit			Net-of-Tax
	(in thousands)		Amount			(Expense)			Amount			Amount			(Expense)			Amount
	Other comprehensive income (loss):
	Foreign currency translation adjustment		$	(78,271	)	$	29,547		$	(48,724	)	$	(17,800	)	$	5,071		$	(12,729	)
	Ownership share of equity method investees’ other comprehensive loss		(6,002		)	1,521			(4,481		)	(944		)	(1,054		)	(1,998		)
	Defined benefit pension and postretirement plan adjustments		4,301			(1,613		)	2,688			2,636			(988		)	1,648
	Unrealized gain (loss) on derivative contracts		1,414			(520		)	894			(645		)	216			(429		)
	Unrealized gain (loss) on available-for-sale securities		974			(365		)	609			(29		)	11			(18		)
	Total other comprehensive loss		(77,584		)	28,570			(49,014		)	(16,782		)	3,256			(13,526		)
	Less: Other comprehensive income (loss) attributable to noncontrolling interests		591			—			591			(4,339		)	—			(4,339		)
	Other comprehensive loss attributable to Fluor Corporation		$	(78,175	)	$	28,570		$	(49,605	)	$	(12,443	)	$	3,256		$	(9,187	)

	The changes in accumulated other comprehensive income (“AOCI”) balances by component (after-tax) for the three months ended March 31, 2015 are as follows:

	(in thousands)		Foreign			Ownership Share			Defined Benefit			Unrealized			Unrealized			Accumulated
			Currency			of Equity Method			Pension and			Gain (Loss)			Gain (Loss)			Other
			Translation			Investees’ Other			Postretirement			on			on Available-			Comprehensive
						Comprehensive			Plans			Derivative			for-Sale			Income (Loss),
						Loss						Contracts			Securities			Net
	Attributable to Fluor Corporation:
	Balance as of December 31, 2014		$	(119,416	)	$	(30,436	)	$	(325,145	)	$	(8,954	)	$	(261	)	$	(484,212	)
	Other comprehensive income (loss) before reclassifications		(49,244		)	(4,481		)	—			596			678			(52,451		)
	Amounts reclassified from AOCI		—			—			2,688			227			(69		)	2,846
	Net other comprehensive income (loss)		(49,244		)	(4,481		)	2,688			823			609			(49,605		)
	Balance as of March 31, 2015		$	(168,660	)	$	(34,917	)	$	(322,457	)	$	(8,131	)	$	348		$	(533,817	)

	Attributable to Noncontrolling Interests:
	Balance as of December 31, 2014		$	1,328		$	—		$	—		$	(685	)	$	—		$	643
	Other comprehensive income (loss) before reclassifications		520			—			—			(3		)	—			517
	Amounts reclassified from AOCI		—			—			—			74			—			74
	Net other comprehensive income		520			—			—			71			—			591
	Balance as of March 31, 2015		$	1,848		$	—		$	—		$	(614	)	$	—		$	1,234

	The changes in AOCI balances by component (after-tax) for the three months ended March 31, 2014 are as follows:

	(in thousands)		Foreign			Ownership Share			Defined Benefit			Unrealized			Unrealized			Accumulated
			Currency			of Equity Method			Pension and			Gain (Loss)			Gain (Loss)			Other
			Translation			Investees’ Other			Postretirement			on			on Available-			Comprehensive
						Comprehensive			Plans			Derivative			for-Sale			Income (Loss),
						Loss						Contracts			Securities			Net
	Attributable to Fluor Corporation:
	Balance as of December 31, 2013		$	(164	)	$	(32,274	)	$	(258,297	)	$	(7,642	)	$	176		$	(298,201	)
	Other comprehensive loss before reclassifications		(8,451		)	(1,998		)	(403		)	(544		)	(26		)	(11,422		)
	Amounts reclassified from AOCI		—			—			2,051			176			8			2,235
	Net other comprehensive income (loss)		(8,451		)	(1,998		)	1,648			(368		)	(18		)	(9,187		)
	Balance as of March 31, 2014		$	(8,615	)	$	(34,272	)	$	(256,649	)	$	(8,010	)	$	158		$	(307,388	)

	Attributable to Noncontrolling Interests:
	Balance as of December 31, 2013		$	7,885		$	—		$	—		$	67		$	—		$	7,952
	Other comprehensive loss before reclassifications		(4,278		)	—			—			(64		)	—			(4,342		)
	Amounts reclassified from AOCI		—			—			—			3			—			3
	Net other comprehensive loss		(4,278		)	—			—			(61		)	—			(4,339		)
	Balance as of March 31, 2014		$	3,607		$	—		$	—		$	6		$	—		$	3,613

	The significant items reclassified out of AOCI and the corresponding location and impact on the Condensed Consolidated Statement of Earnings are as follows:

				Three Months Ended
		Location in Condensed		March 31,
(in thousands)		Consolidated Statement of Earnings		2015			2014
Component of AOCI:
Defined benefit pension plan adjustments		Various accounts(1)		$	(4,301	)	$	(3,281	)
Income tax benefit		Income tax expense		1,613			1,230
Net of tax				$	(2,688	)	$	(2,051	)

Unrealized gain (loss) on derivative contracts:
Commodity and foreign currency contracts		Total cost of revenue		$	(62	)	$	129
Interest rate contracts		Interest expense		(419		)	(419		)
Income tax benefit (net)		Income tax expense		180			111
Net of tax				(301		)	(179		)
Less: Noncontrolling interests		Net earnings attributable to noncontrolling interests		(74		)	(3		)
Net of tax and noncontrolling interests				$	(227	)	$	(176	)

Unrealized gain (loss) on available-for-sale securities		Corporate general and administrative expense		$	110		$	(13	)
Income tax benefit (expense)		Income tax expense		(41		)	5
Net of tax				$	69		$	(8	)


	-1		Defined benefit pension plan adjustments were reclassified primarily to total cost of revenue and corporate general and administrative expense.

Income_Taxes

Income Taxes	3 Months Ended
Income Taxes	Mar. 31, 2015
Income Taxes
Income Taxes	(4)Income Taxes

	The effective tax rates for the three months ended March 31, 2015 and 2014 were 33.5 percent and 28.8 percent, respectively. Both periods benefited from earnings attributable to noncontrolling interests for which income taxes are not typically the responsibility of the company. The lower effective tax rate for the three months ended March 31, 2014 was primarily due to the recognition of a deferred tax benefit for foreign taxes previously paid on certain unremitted foreign earnings, as well as higher earnings attributable to noncontrolling interests.

	The company conducts business globally and, as a result, the company or one or more of its subsidiaries files income tax returns in the U.S. federal jurisdiction and various state and foreign jurisdictions. In the normal course of business, the company is subject to examination by taxing authorities throughout the world, including such major jurisdictions as Australia, Canada, the Netherlands, South Africa, the United Kingdom and the United States. Although the company believes its reserves for its tax positions are reasonable, the final outcome of tax audits could be materially different, both favorably and unfavorably. With few exceptions, the company is no longer subject to U.S. federal, state and local, or non-U.S. income tax examinations for years before 2008.

Cash_Paid_for_Interest_and_Tax

Cash Paid for Interest and Taxes	3 Months Ended
Cash Paid for Interest and Taxes	Mar. 31, 2015
Cash Paid for Interest and Taxes
Cash Paid for Interest and Taxes	(5)Cash Paid for Interest and Taxes

	Cash paid for interest was $10 million for both the three months ended March 31, 2015 and 2014. Income tax payments, net of refunds, were $62 million and $37 million during the three-month periods ended March 31, 2015 and 2014, respectively.

Earnings_Per_Share

Earnings Per Share	3 Months Ended
	Mar. 31, 2015
Earnings Per Share
Earnings Per Share	(6)Earnings Per Share

	Diluted earnings per share (“EPS”) reflects the assumed exercise or conversion of all dilutive securities using the treasury stock method.

	The calculations of the basic and diluted EPS for the three months ended March 31, 2015 and 2014 are presented below:
		Three Months Ended
		March 31,
	(in thousands, except per share amounts)	2015		2014

	Net earnings attributable to Fluor Corporation	$	144,079	$	149,074

	Basic EPS attributable to Fluor Corporation:
	Weighted average common shares outstanding	147,731		160,213

	Basic earnings per share	$	0.98	$	0.93

	Diluted EPS attributable to Fluor Corporation:
	Weighted average common shares outstanding	147,731		160,213

	Diluted effect:
	Employee stock options, restricted stock units and shares and Value Driver Incentive units	1,825		1,709
	Conversion equivalent of dilutive convertible debt	359		438
	Weighted average diluted shares outstanding	149,915		162,360

	Diluted earnings per share	$	0.96	$	0.92

	Anti-dilutive securities not included above	3,162		440

	During the three months ended March 31, 2015 and 2014, the company repurchased and cancelled 1,939,997 and 2,461,800 shares of its common stock, respectively, under its stock repurchase program for $112 million and $192 million, respectively.

Fair_Value_of_Financial_Instru

Fair Value of Financial Instruments	3 Months Ended
Fair Value of Financial Instruments	Mar. 31, 2015
Fair Value of Financial Instruments
Fair Value of Financial Instruments	(7)Fair Value of Financial Instruments

	The fair value hierarchy established by ASC 820, “Fair Value Measurement,” prioritizes the use of inputs used in valuation techniques into the following three levels:

	 Level 1	— quoted prices in active markets for identical assets and liabilities
	 Level 2	— inputs other than quoted prices in active markets for identical assets and liabilities that are observable, either directly or indirectly
	 Level 3	— unobservable inputs

	The company measures and reports assets and liabilities at fair value utilizing pricing information received from third parties. The company performs procedures to verify the reasonableness of pricing information received for significant assets and liabilities classified as Level 2.

	The following table presents, for each of the fair value hierarchy levels required under ASC 820-10, the company’s assets and liabilities that are measured at fair value on a recurring basis as of March 31, 2015 and December 31, 2014:
			March 31, 2015												December 31, 2014
			Fair Value Hierarchy												Fair Value Hierarchy
	(in thousands)		Total			Level 1			Level 2			Level 3			Total		Level 1		Level 2		Level 3
	Assets:
	Cash and cash equivalents(1)		$	7,269		$	7,269		$	—		$	—		$	14,419	$	14,419	$	—	$	—
	Marketable securities, current(2)		64,937			—			64,937			—			80,706		—		80,706		—
	Deferred compensation trusts(3)		54,913			54,913			—			—			94,893		94,893		—		—
	Marketable securities, noncurrent(4)		254,761			—			254,761			—			343,644		—		343,644		—
	Derivative assets(5)
	Commodity contracts		315			—			315			—			561		—		561		—
	Foreign currency contracts		2,710			—			2,710			—			180		—		180		—

	Liabilities:
	Derivative liabilities(5)
	Commodity contracts		$	2,000		$	—		$	2,000		$	—		$	2,290	$	—	$	2,290	$	—
	Foreign currency contracts		3,670			—			3,670			—			4,392		—		4,392		—



		-1		Consists primarily of registered money market funds valued at fair value. These investments represent the net asset value of the shares of such funds as of the close of business at the end of the period.

		-2		Consists of investments in U.S. agency securities, U.S. Treasury securities and corporate debt securities with maturities of less than one year that are valued based on pricing models, which are determined from a compilation of primarily observable market information, broker quotes in non-active markets or similar assets.

		-3		Consists primarily of registered money market funds and an equity index fund valued at fair value. These investments, which are trading securities, represent the net asset value of the shares of such funds as of the close of business at the end of the period based on the last trade or official close of an active market or exchange.

		-4		Consists of investments in U.S. agency securities, U.S. Treasury securities and corporate debt securities with maturities ranging from one year to three years that are valued based on pricing models, which are determined from a compilation of primarily observable market information, broker quotes in non-active markets or similar assets.

		-5		See Note 8 for the classification of commodity and foreign currency contracts in the Condensed Consolidated Balance Sheet. Commodity and foreign currency contracts are estimated using standard pricing models with market-based inputs, which take into account the present value of estimated future cash flows.

	All of the company’s financial instruments carried at fair value are included in the table above. All of the above financial instruments are available-for-sale securities except for those held in the deferred compensation trusts (which are trading securities) and derivative assets and liabilities. The company has determined that there was no other-than-temporary impairment of available-for-sale securities with unrealized losses, and the company expects to recover the entire cost basis of the securities. The available-for-sale securities are made up of the following security types as of March 31, 2015: money market funds of $7 million, U.S. agency securities of $56 million, U.S. Treasury securities of $60 million and corporate debt securities of $204 million. As of December 31, 2014, available-for-sale securities consisted of money market funds of $14 million, U.S. agency securities of $73 million, U.S. Treasury securities of $107 million and corporate debt securities of $245 million. The amortized cost of these available-for-sale securities is not materially different from the fair value. During the three months ended March 31, 2015 and 2014, proceeds from sales and maturities of available-for-sale securities were $183 million and $64 million, respectively.

	The carrying values and estimated fair values of the company’s financial instruments that are not required to be measured at fair value in the Condensed Consolidated Balance Sheet are as follows:
					March 31, 2015						December 31, 2014
			Fair Value		Carrying			Fair			Carrying			Fair
	(in thousands)		Hierarchy		Value			Value			Value			Value
	Assets:
	Cash(1)		Level 1		$	1,034,253		$	1,034,253		$	1,224,834		$	1,224,834
	Cash equivalents(2)		Level 2		769,771			769,771			753,872			753,872
	Marketable securities, current(3)		Level 2		80,631			80,631			24,425			24,425
	Notes receivable, including noncurrent portion(4)		Level 3		17,614			17,614			19,284			19,284
	Liabilities:
	3.375% Senior Notes(5)		Level 2		$	497,155		$	519,925		$	497,045		$	510,465
	3.5% Senior Notes(5)		Level 2		494,774			515,545			494,640			498,914
	1.5% Convertible Senior Notes(5)		Level 2		18,324			38,333			18,324			40,826
	Other borrowings(6)		Level 2		9,716			9,716			10,418			10,418



		-1		Cash consists of bank deposits. Carrying amounts approximate fair value.

		-2		Cash equivalents consist of held-to-maturity time deposits with maturities of three months or less at the date of purchase. The carrying amounts of these time deposits approximate fair value because of the short-term maturity of these instruments.

		-3		Marketable securities, current consist of held-to-maturity time deposits with original maturities greater than three months that will mature within one year. The carrying amounts of these time deposits approximate fair value because of the short-term maturity of these instruments. Amortized cost is not materially different from the fair value.

	-4		Notes receivable are carried at net realizable value which approximates fair value. Factors considered by the company in determining the fair value include the credit worthiness of the borrower, current interest rates, the term of the note and any collateral pledged as security. Notes receivable are periodically assessed for impairment.

	-5		The fair value of the 3.375% Senior Notes, 3.5% Senior Notes and 1.5% Convertible Senior Notes are estimated based on quoted market prices for similar issues.

	-6		Other borrowings primarily represent amounts outstanding under a short-term credit facility. The carrying amount of borrowings under this credit facility approximates fair value because of the short-term maturity.

Derivatives_and_Hedging

Derivatives and Hedging	3 Months Ended
Derivatives and Hedging	Mar. 31, 2015
Derivatives and Hedging
Derivatives and Hedging	(8)Derivatives and Hedging

	The company limits exposure to foreign currency fluctuations in most of its engineering and construction contracts through provisions that require client payments in currencies corresponding to the currencies in which cost is incurred. Certain financial exposure, which includes currency and commodity price risk associated with engineering and construction contracts, currency risk associated with monetary assets and liabilities denominated in nonfunctional currencies and risk associated with interest rate volatility, may subject the company to earnings volatility. In cases where financial exposure is identified, the company generally implements a hedging strategy utilizing derivative instruments as hedging instruments to mitigate the risk. These hedging instruments are designated as either fair value or cash flow hedges in accordance with ASC 815, “Derivatives and Hedging.” The company formally documents its hedge relationships at inception, including identification of the hedging instruments and the hedged items, as well as its risk management objectives and strategies for undertaking the hedge transaction. The company also formally assesses, both at inception and at least quarterly thereafter, whether the hedging instruments are highly effective in offsetting changes in the fair value of the hedged items. The fair values of all hedging instruments are recognized as assets or liabilities at the balance sheet date. For fair value hedges, the effective portion of the change in the fair value of the hedging instrument is offset against the change in the fair value of the underlying asset or liability through earnings. For cash flow hedges, the effective portion of the hedging instrument’s gain or loss due to changes in fair value is recorded as a component of AOCI and is reclassified into earnings when the hedged item settles. Any ineffective portion of a hedging instrument’s change in fair value is immediately recognized in earnings. The company does not enter into derivative instruments for speculative purposes. The company maintains master netting arrangements with certain counterparties to facilitate the settlement of derivative instruments; however, the company reports the fair value of derivative instruments on a gross basis.

	As of March 31, 2015, the company had total gross notional amounts of $636 million of foreign currency contracts and $10 million of commodity contracts outstanding relating to engineering and construction contract obligations and monetary assets and liabilities denominated in nonfunctional currencies. The foreign currency contracts are of varying duration, none of which extend beyond December 2017. The commodity contracts are of varying duration, none of which extend beyond May 2017. The impact to earnings due to hedge ineffectiveness was immaterial for the three months ended March 31, 2015 and 2014.

	The fair values of derivatives designated as hedging instruments under ASC 815 as of March 31, 2015 and December 31, 2014 were as follows:
		Asset Derivatives							Liability Derivatives
		Balance Sheet		March 31,			December 31,		Balance Sheet		March 31,			December 31,
	(in thousands)	Location		2015			2014		Location		2015			2014
	Commodity contracts	Other current assets		$	106		$	365	Other accrued liabilities		$	1,057		$	1,362
	Foreign currency contracts	Other current assets		1,422			128		Other accrued liabilities		1,755			3,721
	Commodity contracts	Other assets		209			196		Noncurrent liabilities		943			928
	Foreign currency contracts	Other assets		1,288			52		Noncurrent liabilities		1,915			671
	Total			$	3,025		$	741			$	5,670		$	6,682

	The pre-tax net gains (losses) recognized in earnings associated with the hedging instruments designated as fair value hedges for the three months ended March 31, 2015 and 2014 were as follows:
				Three Months Ended
				March 31,
	Fair Value Hedges (in thousands)	Location of Gain		2015			2014
	Foreign currency contracts	Corporate general and administrative expense		$	(1,154	)	$	1,259

	The pre-tax amount of gain (loss) recognized in earnings on hedging instruments for the fair value hedges noted in the table above offset the amount of gain (loss) recognized in earnings on the hedged items in the same locations in the Condensed Consolidated Statement of Earnings.

	The after-tax amount of gain (loss) recognized in OCI and reclassified from AOCI into earnings associated with the derivative instruments designated as cash flow hedges for the three months ended March 31, 2015 and 2014 was as follows:
		After-Tax Amount of Gain							After-Tax Amount of Gain
		(Loss) Recognized in OCI							(Loss) Reclassified from
									AOCI into Earnings
		Three Months Ended							Three Months Ended
		March 31,							March 31,
	Cash Flow Hedges (in thousands)	2015			2014			Location of Gain (Loss)	2015			2014
	Commodity contracts	$	(112	)	$	(143	)	Total cost of revenue	$	(91	)	$	78
	Foreign currency contracts	708			(401		)	Total cost of revenue	126			8
	Interest rate contracts	—			—			Interest expense	(262		)	(262		)
	Total	$	596		$	(544	)		$	(227	)	$	(176	)

Retirement_Benefits

Retirement Benefits	3 Months Ended
	Mar. 31, 2015
Retirement Benefits
Retirement Benefits	(9)Retirement Benefits

	Net periodic pension expense for the U.S. and non-U.S. defined benefit pension plans included the following components:
		U.S. Pension Plan						Non-U.S. Pension Plans
		Three Months Ended						Three Months Ended
		March 31,						March 31,
	(in thousands)	2015			2014			2015			2014
	Service cost	$	1,700		$	950		$	5,202		$	4,153
	Interest cost	3,799			7,919			6,641			8,804
	Expected return on assets	(5,275		)	(7,526		)	(12,305		)	(12,248		)
	Amortization of prior service cost	217			187			(206		)	—
	Recognized net actuarial loss	2,351			1,109			1,939			1,984
	Net periodic pension expense	$	2,792		$	2,639		$	1,271		$	2,693

	The company currently expects to contribute up to $100 million into its defined benefit pension plans during 2015, which is expected to be in excess of the minimum funding required and includes estimated additional funding to settle the U.S. defined benefit pension plan (the “U.S. plan”). During the three months ended March 31, 2015, contributions of approximately $0.9 million were made by the company.

	The company’s Board of Directors previously approved amendments to freeze the accrual of future service-related benefits for salaried participants of the U.S. plan as of December 31, 2011 and craft participants of the U.S. plan as of December 31, 2013. During the fourth quarter of 2014, the company’s Board of Directors approved an amendment to terminate the U.S. plan effective December 31, 2014. The U.S. plan is expected to be settled in late 2015, subject to regulatory approval. The company’s ultimate settlement obligation will depend upon the nature and timing of participant settlements and prevailing market conditions. Upon settlement, the company expects to recognize additional expense, consisting of unrecognized actuarial losses included in AOCI that totaled approximately $271 million as of March 31, 2015, adjusted for the difference between the ultimate settlement obligation and the company’s accrued pension liability, which could be significant. The company does not expect the settlement of the plan obligations to have a material impact on its cash position.

Financing_Arrangements

Financing Arrangements	3 Months Ended
	Mar. 31, 2015
Financing Arrangements
Financing Arrangements	(10)Financing Arrangements

	As of March 31, 2015, the company had a combination of committed and uncommitted lines of credit that totaled $5.3 billion. These lines may be used for revolving loans, letters of credit and/or general purposes. The committed lines of credit consist of a $1.7 billion Revolving Loan and Letter of Credit Facility and a $1.8 billion Revolving Loan and Letter of Credit Facility. Both facilities mature in May 2019. The company may utilize up to $1.75 billion in the aggregate of the combined $3.5 billion committed lines of credit for revolving advances. Each of the credit facilities may be increased up to an additional $500 million subject to certain conditions, and contain customary financial and restrictive covenants, including a maximum ratio of consolidated debt to tangible net worth of one-to-one and a cap on the aggregate amount of debt of $750 million for the company’s subsidiaries. Borrowings under both facilities bear interest at rates based on the Eurodollar Rate or an alternative base rate, plus an applicable borrowing margin.

	In November 2014, the company issued $500 million of 3.5% Senior Notes (the “2014 Notes”) due December 15, 2024 and received proceeds of $491 million, net of underwriting discounts. Interest on the 2014 Notes is payable semi-annually on June 15 and December 15 of each year, beginning on June 15, 2015. Prior to September 15, 2024, the company may redeem the 2014 Notes at a redemption price equal to 100 percent of the principal amount, plus a “make whole” premium described in the indenture. On or after September 15, 2024, the company may redeem the 2014 Notes at 100 percent of the principal amount plus accrued and unpaid interest, if any, to the date of purchase.

	In September 2011, the company issued $500 million of 3.375% Senior Notes (the “2011 Notes”) due September 15, 2021 and received proceeds of $492 million, net of underwriting discounts. Interest on the 2011 Notes is payable semi-annually on March 15 and September 15 of each year, and began on March 15, 2012. The company may, at any time, redeem the 2011 Notes at a redemption price equal to 100 percent of the principal amount, plus a “make whole” premium described in the indenture.

	For both the 2014 Notes and the 2011 Notes, if a change of control triggering event occurs, as defined by the terms of the respective indentures, the company will be required to offer to purchase the 2014 Notes and the 2011 Notes at a purchase price equal to 101 percent of their principal amount, plus accrued and unpaid interest, if any, to the date of purchase. The company is generally not limited under the indentures governing the 2014 Notes and the 2011 Notes in its ability to incur additional indebtedness provided the company is in compliance with certain restrictive covenants, including restrictions on liens and restrictions on sale and leaseback transactions.

	In February 2004, the company issued $330 million of 1.5% Convertible Senior Notes (the “2004 Notes”) due February 15, 2024 and received proceeds of $323 million, net of underwriting discounts. In December 2004, the company irrevocably elected to pay the principal amount of the 2004 Notes in cash. The 2004 Notes are convertible if a specified trading price of the company’s common stock (the “trigger price”) is achieved and maintained for a specified period. The trigger price condition was satisfied during the fourth quarter of 2014 and first quarter of 2015, and the 2004 Notes were therefore classified as short-term debt as of December 31, 2014 and March 31, 2015. In March 2015, the company notified the holders of the 2004 Notes of its election to redeem all of the outstanding 2004 Notes on May 7, 2015. The redemption price is equal to 100 percent of the principal amount plus accrued and unpaid interest up to (but excluding) May 7, 2015. The holders of the 2004 Notes may, at their option, convert the 2004 Notes at any time before the close of business on May 6, 2015.

	The following table presents information related to the liability and equity components of the 2004 Notes:
		March 31,		December 31,
	(in thousands)	2015		2014

	Carrying value of the equity component	$	19,516	$	19,516
	Principal amount and carrying value of the liability component	18,324		18,324

	The 2004 Notes are convertible into shares of the company’s common stock (par value $0.01 per share) at a conversion rate of 37.0997 shares per each $1,000 principal amount of the 2004 Notes. Interest expense for the first quarter of both 2015 and 2014 included original coupon interest of less than $0.1 million. The if-converted value of $39 million was in excess of the principal value as of March 31, 2015.

	During the third quarter of 2013, the company established a short-term credit facility to purchase land and construction equipment associated with the equipment operations in the Global Services segment. Outstanding borrowings under the facility were $9 million and $10 million as of March 31, 2015 and December 31, 2014, respectively.

	As of March 31, 2015, the company was in compliance with all of the financial covenants related to its debt agreements.

StockBased_Plans

Stock-Based Plans	3 Months Ended
Stock-Based Plans	Mar. 31, 2015
Stock-Based Plans
Stock-Based Plans	(11)Stock-Based Plans

	The company’s executive and director stock-based compensation plans are described, and informational disclosures provided, in the Notes to Consolidated Financial Statements included in the Form 10-K for the year ended December 31, 2014. In the first quarter of 2015 and 2014, 520,947 and 357,138 restricted stock units, respectively, were granted to executives, at weighted-average per share prices of $59.05 and $79.19, respectively. For the company’s executives, the restricted units granted in 2015 and 2014 generally vest ratably over three years. During the first quarter of 2015 and 2014, options for the purchase of 963,288 shares at a weighted-average exercise price of $59.05 per share and 684,486 shares at a weighted-average exercise price of $79.19 per share, respectively, were awarded to executives. The options granted in 2015 and 2014 vest ratably over three years. The options expire ten years after the grant date.

	In the first quarter of 2015 and 2014, performance-based Value Driver Incentive (“VDI”) units totaling 430,970 and 315,551, respectively, were granted to executives at weighted-average per share prices of $59.05 and $79.19, respectively. The number of units is adjusted at the end of each performance period based on the achievement of certain performance criteria. The VDI awards granted in 2015 can only be settled in company stock and are accounted for as equity awards in accordance with ASC 718. The VDI awards granted in 2014 may be settled in cash, based on the closing price of the company’s common stock on the vesting date, or company stock. In accordance with ASC 718, the awards granted in 2014 are classified as liabilities and remeasured at fair value at the end of each reporting period until the awards are settled. Both the VDI awards granted in 2015 and 2014 vest after a period of approximately three years.

Noncontrolling_Interests

Noncontrolling Interests	3 Months Ended
Noncontrolling Interests	Mar. 31, 2015
Noncontrolling Interests.
Noncontrolling Interests	(12)Noncontrolling Interests

	The company applies the provisions of ASC 810-10-45, which establishes accounting and reporting standards for ownership interests in subsidiaries held by parties other than the parent, the amount of consolidated net earnings attributable to the parent and to the noncontrolling interests, changes in a parent’s ownership interest and the valuation of retained noncontrolling equity investments when a subsidiary is deconsolidated.

	As required by ASC 810-10-45, the company has separately disclosed on the face of the Condensed Consolidated Statement of Earnings for all periods presented the amount of net earnings attributable to the company and the amount of net earnings attributable to noncontrolling interests. For the three months ended March 31, 2015 and 2014, net earnings attributable to noncontrolling interests were $22 million and $44 million, respectively. Income taxes associated with earnings attributable to noncontrolling interests were immaterial in both periods presented. Distributions paid to noncontrolling interests were $4 million and $16 million for the three months ended March 31, 2015 and 2014, respectively. Capital contributions by noncontrolling interests were $0.7 million and less than $0.1 million for the three months ended March 31, 2015 and 2014, respectively.

Contingencies_and_Commitments

Contingencies and Commitments	3 Months Ended
Contingencies and Commitments	Mar. 31, 2015
Contingencies and Commitments
Contingencies and Commitments	(13)Contingencies and Commitments

	The company and certain of its subsidiaries are subject to litigation, claims and other commitments and contingencies arising in the ordinary course of business, including matters related to government contracting and environmental regulations. The company currently does not expect that the ultimate resolution of any open matters will have a material adverse effect on its consolidated financial position or results of operations.

	As of March 31, 2015, several matters were in the litigation and dispute resolution process. The following discussion provides a background and current status of these matters:

	St. Joe Minerals Matters

	Since 1995, the company has been named as a defendant in a number of lawsuits alleging injuries resulting from the lead business of St. Joe Minerals Corporation (“St. Joe”) and The Doe Run Company (“Doe Run”) in Herculaneum, Missouri, which are discontinued operations. The company was named as a defendant in these lawsuits as a result of its ownership or other interests in St. Joe and Doe Run in the period between 1981 and 1994. In 1994, the company sold its interests in St. Joe and Doe Run, along with all liabilities associated with the lead business, pursuant to a sale agreement in which the buyer agreed to indemnify the company for those liabilities. Until December 2010, substantially all the lawsuits were settled and paid by the buyer; and in all cases the company was fully released.

	In December 2010, the buyer settled with certain plaintiffs without obtaining a release for the benefit of the company, leaving the company to defend its case with these plaintiffs in the City of St. Louis Circuit Court. In late July 2011, the jury reached an unexpected verdict in this case, ruling in favor of 16 of the plaintiffs and against the company and certain former subsidiaries for $38.5 million in compensatory and economic damages and $320 million in punitive damages. In August 2011, the court entered judgments based on the verdict. In December 2011, the company appealed the judgments of the court.

	In June 2014, the Missouri Court of Appeals issued its opinion reversing and remanding to the trial court the award of $240 million in punitive damages against Fluor. In addition, the appellate court upheld the judgment for $38.5 million in compensatory and economic damages and $80 million of punitive damages against the company and its former subsidiaries to whom the company has provided certain indemnities relating to the St. Joe and Doe Run businesses.

	In October 2014, the company entered into a settlement agreement with counsel for a number of plaintiffs (including the 16 plaintiffs described above). In January 2015, the company paid $306 million pursuant to the settlement agreement. While the company is unable to estimate a range of possible losses in the remaining lawsuits, it does not expect any material charges to result from these cases. In addition, the company will continue to take steps to enforce its rights to indemnification described above for both the settled matters and outstanding claims.

	Other Matters

	The company and certain of its clients have made claims arising from the performance under its contracts. The company recognizes revenue, but not profit, for certain claims (including change orders in dispute and unapproved change orders in regard to both scope and price) when it is determined that recovery of incurred costs is probable and the amounts can be reliably estimated. Under ASC 605-35-25, these requirements are satisfied when (a) the contract or other evidence provides a legal basis for the claim, (b) additional costs were caused by circumstances that were unforeseen at the contract date and not the result of deficiencies in the company’s performance, (c) claim-related costs are identifiable and considered reasonable in view of the work performed, and (d) evidence supporting the claim is objective and verifiable. The company periodically evaluates its position and the amounts recognized in revenue with respect to all its claims. Recognized claims against clients amounted to $21 million as of both March 31, 2015 and December 31, 2014 and are included in contract work in progress in the accompanying Condensed Consolidated Balance Sheet.

	From time to time, the company enters into significant contracts with the U.S. government and its agencies. Government contracts are subject to audits and investigations by government representatives with respect to the company’s compliance with various restrictions and regulations applicable to government contractors, including but not limited to the allowability of costs incurred under reimbursable contracts. In connection with performing government contracts, the company maintains reserves for estimated exposures associated with these matters.

Guarantees

Guarantees	3 Months Ended
Guarantees	Mar. 31, 2015
Guarantees
Guarantees	(14)Guarantees

	In the ordinary course of business, the company enters into various agreements providing performance assurances and guarantees to clients on behalf of certain unconsolidated and consolidated partnerships, joint ventures and other jointly executed contracts. These agreements are entered into primarily to support the project execution commitments of these entities. The performance guarantees have various expiration dates ranging from mechanical completion of the project being constructed to a period extending beyond contract completion in certain circumstances. The maximum potential amount of future payments that the company could be required to make under outstanding performance guarantees, which represents the remaining cost of work to be performed by or on behalf of third parties under engineering and construction contracts, was estimated to be $15.5 billion as of March 31, 2015. Amounts that may be required to be paid in excess of estimated cost to complete contracts in progress are not estimable. For cost reimbursable contracts, amounts that may become payable pursuant to guarantee provisions are normally recoverable from the client for work performed under the contract. For lump-sum or fixed-price contracts, the performance guarantee amount is the cost to complete the contracted work, less amounts remaining to be billed to the client under the contract. Remaining billable amounts could be greater or less than the cost to complete. In those cases where costs exceed the remaining amounts payable under the contract, the company may have recourse to third parties, such as owners, co-venturers, subcontractors or vendors for claims. The company assessed its performance guarantee obligation as of March 31, 2015 and December 31, 2014 in accordance with ASC 460, “Guarantees,” and the carrying value of the liability was not material.

	Financial guarantees, made in the ordinary course of business in certain limited circumstances, are entered into with financial institutions and other credit grantors and generally obligate the company to make payment in the event of a default by the borrower. These arrangements generally require the borrower to pledge collateral to support the fulfillment of the borrower’s obligation.

Variable_Interest_Entities

Variable Interest Entities	3 Months Ended
Variable Interest Entities	Mar. 31, 2015
Variable Interest Entities
Variable Interest Entities	(15)Variable Interest Entities

	In the normal course of business, the company forms partnerships or joint ventures primarily for the execution of single contracts or projects. The majority of these partnerships or joint ventures are characterized by a 50 percent or less, noncontrolling ownership or participation interest, with decision making and distribution of expected gains and losses typically being proportionate to the ownership or participation interest. Many of the partnership and joint venture agreements provide for capital calls to fund operations, as necessary. Such funding is infrequent and is not anticipated to be material. The company accounts for its partnerships and joint ventures in accordance with ASC 810, “Consolidation.”

	In accordance with ASC 810, the company assesses its partnerships and joint ventures at inception to determine if any meet the qualifications of a VIE. The company considers a partnership or joint venture a VIE if either (a) the total equity investment is not sufficient to permit the entity to finance its activities without additional subordinated financial support, (b) characteristics of a controlling financial interest are missing (either the ability to make decisions through voting or other rights, the obligation to absorb the expected losses of the entity or the right to receive the expected residual returns of the entity), or (c) the voting rights of the equity holders are not proportional to their obligations to absorb the expected losses of the entity and/or their rights to receive the expected residual returns of the entity, and substantially all of the entity’s activities either involve or are conducted on behalf of an investor that has disproportionately few voting rights. Upon the occurrence of certain events outlined in ASC 810, the company reassesses its initial determination of whether the partnership or joint venture is a VIE. The majority of the company’s partnerships and joint ventures qualify as VIEs because the total equity investment is typically nominal and not sufficient to permit the entity to finance its activities without additional subordinated financial support.

	The company also performs a qualitative assessment of each VIE to determine if the company is its primary beneficiary, as required by ASC 810. The company concludes that it is the primary beneficiary and consolidates the VIE if the company has both (a) the power to direct the economically significant activities of the entity and (b) the obligation to absorb losses of, or the right to receive benefits from, the entity that could potentially be significant to the VIE. The company considers the contractual agreements that define the ownership structure, distribution of profits and losses, risks, responsibilities, indebtedness, voting rights and board representation of the respective parties in determining if the company is the primary beneficiary. The company also considers all parties that have direct or implicit variable interests when determining whether it is the primary beneficiary. As required by ASC 810, management’s assessment of whether the company is the primary beneficiary of a VIE is continuously performed.

	In most cases, when the company is not the primary beneficiary and not required to consolidate the VIE, the proportionate consolidation method of accounting is used for joint ventures and partnerships in the construction industry, whereby the company recognizes its proportionate share of revenue, cost and profit in its Condensed Consolidated Statement of Earnings and uses the one-line equity method of accounting in the Condensed Consolidated Balance Sheet, which is a common application of ASC 810-10-45-14 in the construction industry. The cost and equity methods of accounting are also used, depending on the company’s respective ownership interest and amount of influence on the entity, as well as other factors. The net carrying value of the unconsolidated VIEs classified under “Investments and goodwill” and “Other accrued liabilities” in the Condensed Consolidated Balance Sheet was a net asset of $131 million and $107 million as of March 31, 2015 and December 31, 2014, respectively. Some of the company’s VIEs have debt; however, such debt is typically non-recourse in nature. The company’s maximum exposure to loss as a result of its investments in unconsolidated VIEs is typically limited to the aggregate of the carrying value of the investment and future funding commitments. Future funding commitments as of March 31, 2015 for the unconsolidated VIEs were $20 million.

	In some cases, the company is required to consolidate certain VIEs. As of March 31, 2015, the carrying values of the assets and liabilities associated with the operations of the consolidated VIEs were $977 million and $471 million, respectively. As of December 31, 2014, the carrying values of the assets and liabilities associated with the operations of the consolidated VIEs were $891 million and $442 million, respectively. The assets of a VIE are restricted for use only for the particular VIE and are not available for general operations of the company.

	The company has agreements with certain VIEs to provide financial or performance assurances to clients. See Note 14 for a further discussion of such agreements. A discussion of the company’s more significant or unique VIEs is provided in the Notes to Consolidated Financial Statements included in the Form 10-K for the year ended December 31, 2014.

Operating_Information_by_Segme

Operating Information by Segment	3 Months Ended
	Mar. 31, 2015
Operating Information by Segment
Operating Information by Segment	(16)Operating Information by Segment

	Effective January 1, 2015, the company implemented certain organizational changes that impacted the composition of its reportable segments. The company’s fabrication activities, previously included in the Global Services segment, have been integrated into the reporting segments for which the activities are being performed, primarily the Oil & Gas segment. Additionally, certain plant engineering offices located in Europe, Africa and the Middle East, which were previously included in the industrial services business line of the Industrial & Infrastructure segment, have been integrated into the Oil & Gas segment. Segment operating information for 2014 has been recast to reflect these organizational changes.

	Operating information by reportable segment is as follows:

		Three Months Ended
		March 31,
	External Revenue (in millions)	2015			2014
	Oil & Gas	$	2,471.6		$	2,782.8
	Industrial & Infrastructure	1,080.2			1,615.7
	Government	646.0			593.2
	Global Services	129.7			142.0
	Power	221.1			250.9
	Total external revenue	$	4,548.6		$	5,384.6

	The Global Services segment represents a combination of other operating segments that do not meet the ASC 280, “Segment Reporting,” requirements for separate disclosure or aggregation. Intercompany revenue for the Global Services segment, excluded from the amounts shown above, was $115 million and $136 million for the three months ended March 31, 2015 and 2014, respectively.

		Three Months Ended
		March 31,
	Segment Profit (Loss) (in millions)	2015			2014
	Oil & Gas	$	183.3		$	139.1
	Industrial & Infrastructure	71.1			97.2
	Government	14.8			12.5
	Global Services	15.3			20.7
	Power	(8.6		)	(1.4		)
	Total segment profit	$	275.9		$	268.1

	Power segment profit for the three months ended March 31, 2015 and 2014 included the operations of NuScale, which are primarily for research and development activities associated with the licensing and commercialization of small modular nuclear reactor technology. In May 2014, NuScale entered into a cost-sharing agreement with the U.S. Department of Energy (“DOE”) establishing the terms and conditions of a multi-year funding award that allows certain qualified expenditures to be reimbursed.

	NuScale expenses included in the determination of segment profit were $17 million and $13 million for the three months ended March 31, 2015 and 2014, respectively. NuScale expenses for 2015 were net of qualified reimbursable expenses of $14 million. The company recognizes the cost-sharing award with the DOE, when earned, as a reduction of “Total cost of revenue” in the Condensed Consolidated Statement of Earnings and, correspondingly, as an increase to segment profit in the period for which the related costs are recognized, with the exception of certain pre-award costs which were recognized in the second quarter of 2014 upon entering into the cost-sharing agreement.

	A reconciliation of total segment profit to earnings before taxes is as follows:

		Three Months Ended
		March 31,
	Reconciliation of Total Segment Profit to Earnings Before Taxes (in millions)	2015			2014
	Total segment profit	$	275.9		$	268.1
	Corporate general and administrative expense	(41.1		)	(37.8		)
	Interest income (expense), net	(7.4		)	(3.0		)
	Earnings attributable to noncontrolling interests	21.5			44.2
	Earnings before taxes	$	248.9		$	271.5

	Total assets by segment are as follows:

		March 31,			December 31,
	Total Assets by Segment (in millions)	2015			2014
	Oil & Gas	$	1,476.5		$	1,745.3
	Industrial & Infrastructure	842.2			848.2
	Government	510.1			540.1
	Global Services	763.2			781.9
	Power	196.4			178.6

	The above changes in total assets by segment are primarily due to fluctuations in project working capital related to project execution activities.

Other_Comprehensive_Income_Los1

Other Comprehensive Income (Loss) (Tables)	3 Months Ended
Other Comprehensive Income (Loss) (Tables)	Mar. 31, 2015
Other Comprehensive Income (Loss)
Schedule of tax effects of components of other comprehensive income (loss)
			Three Months Ended									Three Months Ended
			March 31, 2015									March 31, 2014
						Tax									Tax
			Before-Tax			Benefit			Net-of-Tax			Before-Tax			Benefit			Net-of-Tax
	(in thousands)		Amount			(Expense)			Amount			Amount			(Expense)			Amount
	Other comprehensive income (loss):
	Foreign currency translation adjustment		$	(78,271	)	$	29,547		$	(48,724	)	$	(17,800	)	$	5,071		$	(12,729	)
	Ownership share of equity method investees’ other comprehensive loss		(6,002		)	1,521			(4,481		)	(944		)	(1,054		)	(1,998		)
	Defined benefit pension and postretirement plan adjustments		4,301			(1,613		)	2,688			2,636			(988		)	1,648
	Unrealized gain (loss) on derivative contracts		1,414			(520		)	894			(645		)	216			(429		)
	Unrealized gain (loss) on available-for-sale securities		974			(365		)	609			(29		)	11			(18		)
	Total other comprehensive loss		(77,584		)	28,570			(49,014		)	(16,782		)	3,256			(13,526		)
	Less: Other comprehensive income (loss) attributable to noncontrolling interests		591			—			591			(4,339		)	—			(4,339		)
	Other comprehensive loss attributable to Fluor Corporation		$	(78,175	)	$	28,570		$	(49,605	)	$	(12,443	)	$	3,256		$	(9,187	)


Schedule of changes in accumulated other comprehensive income balances by component (after-tax)	(in thousands)		Foreign			Ownership Share			Defined Benefit			Unrealized			Unrealized			Accumulated
			Currency			of Equity Method			Pension and			Gain (Loss)			Gain (Loss)			Other
			Translation			Investees’ Other			Postretirement			on			on Available-			Comprehensive
						Comprehensive			Plans			Derivative			for-Sale			Income (Loss),
						Loss						Contracts			Securities			Net
	Attributable to Fluor Corporation:
	Balance as of December 31, 2014		$	(119,416	)	$	(30,436	)	$	(325,145	)	$	(8,954	)	$	(261	)	$	(484,212	)
	Other comprehensive income (loss) before reclassifications		(49,244		)	(4,481		)	—			596			678			(52,451		)
	Amounts reclassified from AOCI		—			—			2,688			227			(69		)	2,846
	Net other comprehensive income (loss)		(49,244		)	(4,481		)	2,688			823			609			(49,605		)
	Balance as of March 31, 2015		$	(168,660	)	$	(34,917	)	$	(322,457	)	$	(8,131	)	$	348		$	(533,817	)

	Attributable to Noncontrolling Interests:
	Balance as of December 31, 2014		$	1,328		$	—		$	—		$	(685	)	$	—		$	643
	Other comprehensive income (loss) before reclassifications		520			—			—			(3		)	—			517
	Amounts reclassified from AOCI		—			—			—			74			—			74
	Net other comprehensive income		520			—			—			71			—			591
	Balance as of March 31, 2015		$	1,848		$	—		$	—		$	(614	)	$	—		$	1,234

	(in thousands)		Foreign			Ownership Share			Defined Benefit			Unrealized			Unrealized			Accumulated
			Currency			of Equity Method			Pension and			Gain (Loss)			Gain (Loss)			Other
			Translation			Investees’ Other			Postretirement			on			on Available-			Comprehensive
						Comprehensive			Plans			Derivative			for-Sale			Income (Loss),
						Loss						Contracts			Securities			Net
	Attributable to Fluor Corporation:
	Balance as of December 31, 2013		$	(164	)	$	(32,274	)	$	(258,297	)	$	(7,642	)	$	176		$	(298,201	)
	Other comprehensive loss before reclassifications		(8,451		)	(1,998		)	(403		)	(544		)	(26		)	(11,422		)
	Amounts reclassified from AOCI		—			—			2,051			176			8			2,235
	Net other comprehensive income (loss)		(8,451		)	(1,998		)	1,648			(368		)	(18		)	(9,187		)
	Balance as of March 31, 2014		$	(8,615	)	$	(34,272	)	$	(256,649	)	$	(8,010	)	$	158		$	(307,388	)

	Attributable to Noncontrolling Interests:
	Balance as of December 31, 2013		$	7,885		$	—		$	—		$	67		$	—		$	7,952
	Other comprehensive loss before reclassifications		(4,278		)	—			—			(64		)	—			(4,342		)
	Amounts reclassified from AOCI		—			—			—			3			—			3
	Net other comprehensive loss		(4,278		)	—			—			(61		)	—			(4,339		)
	Balance as of March 31, 2014		$	3,607		$	—		$	—		$	6		$	—		$	3,613


Schedule of significant items reclassified out of AOCI and corresponding location and impact on Condensed Consolidated Statement of Earnings
					Three Months Ended
			Location in Condensed		March 31,
	(in thousands)		Consolidated Statement of Earnings		2015			2014
	Component of AOCI:
	Defined benefit pension plan adjustments		Various accounts(1)		$	(4,301	)	$	(3,281	)
	Income tax benefit		Income tax expense		1,613			1,230
	Net of tax				$	(2,688	)	$	(2,051	)

	Unrealized gain (loss) on derivative contracts:
	Commodity and foreign currency contracts		Total cost of revenue		$	(62	)	$	129
	Interest rate contracts		Interest expense		(419		)	(419		)
	Income tax benefit (net)		Income tax expense		180			111
	Net of tax				(301		)	(179		)
	Less: Noncontrolling interests		Net earnings attributable to noncontrolling interests		(74		)	(3		)
	Net of tax and noncontrolling interests				$	(227	)	$	(176	)

	Unrealized gain (loss) on available-for-sale securities		Corporate general and administrative expense		$	110		$	(13	)
	Income tax benefit (expense)		Income tax expense		(41		)	5
	Net of tax				$	69		$	(8	)



		-1		Defined benefit pension plan adjustments were reclassified primarily to total cost of revenue and corporate general and administrative expense.

Earnings_Per_Share_Tables

Earnings Per Share (Tables)	3 Months Ended
	Mar. 31, 2015
Earnings Per Share
Schedule of calculations of basic and diluted EPS		Three Months Ended
		March 31,
	(in thousands, except per share amounts)	2015		2014

	Net earnings attributable to Fluor Corporation	$	144,079	$	149,074

	Basic EPS attributable to Fluor Corporation:
	Weighted average common shares outstanding	147,731		160,213

	Basic earnings per share	$	0.98	$	0.93

	Diluted EPS attributable to Fluor Corporation:
	Weighted average common shares outstanding	147,731		160,213

	Diluted effect:
	Employee stock options, restricted stock units and shares and Value Driver Incentive units	1,825		1,709
	Conversion equivalent of dilutive convertible debt	359		438
	Weighted average diluted shares outstanding	149,915		162,360

	Diluted earnings per share	$	0.96	$	0.92

	Anti-dilutive securities not included above	3,162		440

Fair_Value_of_Financial_Instru1

Fair Value of Financial Instruments (Tables)	3 Months Ended
Fair Value of Financial Instruments (Tables)	Mar. 31, 2015
Fair Value of Financial Instruments
Schedule of assets and liabilities measured at fair value on a recurring basis			March 31, 2015												December 31, 2014
			Fair Value Hierarchy												Fair Value Hierarchy
	(in thousands)		Total			Level 1			Level 2			Level 3			Total		Level 1		Level 2		Level 3
	Assets:
	Cash and cash equivalents(1)		$	7,269		$	7,269		$	—		$	—		$	14,419	$	14,419	$	—	$	—
	Marketable securities, current(2)		64,937			—			64,937			—			80,706		—		80,706		—
	Deferred compensation trusts(3)		54,913			54,913			—			—			94,893		94,893		—		—
	Marketable securities, noncurrent(4)		254,761			—			254,761			—			343,644		—		343,644		—
	Derivative assets(5)
	Commodity contracts		315			—			315			—			561		—		561		—
	Foreign currency contracts		2,710			—			2,710			—			180		—		180		—

	Liabilities:
	Derivative liabilities(5)
	Commodity contracts		$	2,000		$	—		$	2,000		$	—		$	2,290	$	—	$	2,290	$	—
	Foreign currency contracts		3,670			—			3,670			—			4,392		—		4,392		—



		-1		Consists primarily of registered money market funds valued at fair value. These investments represent the net asset value of the shares of such funds as of the close of business at the end of the period.

		-2		Consists of investments in U.S. agency securities, U.S. Treasury securities and corporate debt securities with maturities of less than one year that are valued based on pricing models, which are determined from a compilation of primarily observable market information, broker quotes in non-active markets or similar assets.

		-3		Consists primarily of registered money market funds and an equity index fund valued at fair value. These investments, which are trading securities, represent the net asset value of the shares of such funds as of the close of business at the end of the period based on the last trade or official close of an active market or exchange.

		-4		Consists of investments in U.S. agency securities, U.S. Treasury securities and corporate debt securities with maturities ranging from one year to three years that are valued based on pricing models, which are determined from a compilation of primarily observable market information, broker quotes in non-active markets or similar assets.

		-5		See Note 8 for the classification of commodity and foreign currency contracts in the Condensed Consolidated Balance Sheet. Commodity and foreign currency contracts are estimated using standard pricing models with market-based inputs, which take into account the present value of estimated future cash flows.



Schedule of carrying values and estimated fair values of financial instruments not required to be measured at fair value in Condensed Consolidated Balance Sheet					March 31, 2015						December 31, 2014
			Fair Value		Carrying			Fair			Carrying			Fair
	(in thousands)		Hierarchy		Value			Value			Value			Value
	Assets:
	Cash(1)		Level 1		$	1,034,253		$	1,034,253		$	1,224,834		$	1,224,834
	Cash equivalents(2)		Level 2		769,771			769,771			753,872			753,872
	Marketable securities, current(3)		Level 2		80,631			80,631			24,425			24,425
	Notes receivable, including noncurrent portion(4)		Level 3		17,614			17,614			19,284			19,284
	Liabilities:
	3.375% Senior Notes(5)		Level 2		$	497,155		$	519,925		$	497,045		$	510,465
	3.5% Senior Notes(5)		Level 2		494,774			515,545			494,640			498,914
	1.5% Convertible Senior Notes(5)		Level 2		18,324			38,333			18,324			40,826
	Other borrowings(6)		Level 2		9,716			9,716			10,418			10,418



		-1		Cash consists of bank deposits. Carrying amounts approximate fair value.

		-2		Cash equivalents consist of held-to-maturity time deposits with maturities of three months or less at the date of purchase. The carrying amounts of these time deposits approximate fair value because of the short-term maturity of these instruments.

		-3		Marketable securities, current consist of held-to-maturity time deposits with original maturities greater than three months that will mature within one year. The carrying amounts of these time deposits approximate fair value because of the short-term maturity of these instruments. Amortized cost is not materially different from the fair value.

		-4		Notes receivable are carried at net realizable value which approximates fair value. Factors considered by the company in determining the fair value include the credit worthiness of the borrower, current interest rates, the term of the note and any collateral pledged as security. Notes receivable are periodically assessed for impairment.

		-5		The fair value of the 3.375% Senior Notes, 3.5% Senior Notes and 1.5% Convertible Senior Notes are estimated based on quoted market prices for similar issues.

		-6		Other borrowings primarily represent amounts outstanding under a short-term credit facility. The carrying amount of borrowings under this credit facility approximates fair value because of the short-term maturity.

Derivatives_and_Hedging_Tables

Derivatives and Hedging (Tables)	3 Months Ended
Derivatives and Hedging (Tables)	Mar. 31, 2015
Derivatives and Hedging
Schedule of fair values of derivatives designated as hedging instruments under ASC 815		Asset Derivatives							Liability Derivatives
		Balance Sheet		March 31,			December 31,		Balance Sheet		March 31,			December 31,
	(in thousands)	Location		2015			2014		Location		2015			2014
	Commodity contracts	Other current assets		$	106		$	365	Other accrued liabilities		$	1,057		$	1,362
	Foreign currency contracts	Other current assets		1,422			128		Other accrued liabilities		1,755			3,721
	Commodity contracts	Other assets		209			196		Noncurrent liabilities		943			928
	Foreign currency contracts	Other assets		1,288			52		Noncurrent liabilities		1,915			671
	Total			$	3,025		$	741			$	5,670		$	6,682


Schedule of after-tax amount of gain (loss) recognized in OCI and reclassified from AOCI into earnings associated with derivative instruments designated as cash flow hedges		After-Tax Amount of Gain							After-Tax Amount of Gain
		(Loss) Recognized in OCI							(Loss) Reclassified from
									AOCI into Earnings
		Three Months Ended							Three Months Ended
		March 31,							March 31,
	Cash Flow Hedges (in thousands)	2015			2014			Location of Gain (Loss)	2015			2014
	Commodity contracts	$	(112	)	$	(143	)	Total cost of revenue	$	(91	)	$	78
	Foreign currency contracts	708			(401		)	Total cost of revenue	126			8
	Interest rate contracts	—			—			Interest expense	(262		)	(262		)
	Total	$	596		$	(544	)		$	(227	)	$	(176	)


Hedging instruments designated as fair value hedges
Derivative gain (loss)
Schedule of pre-tax net gains (losses) recognized in earnings				Three Months Ended
				March 31,
	Fair Value Hedges (in thousands)	Location of Gain		2015			2014
	Foreign currency contracts	Corporate general and administrative expense		$	(1,154	)	$	1,259

Retirement_Benefits_Tables

Retirement Benefits (Tables) (Defined Benefit Pension Plans)	3 Months Ended
	Mar. 31, 2015
Defined Benefit Pension Plans
Defined Benefit Plans and Other Postretirement Benefit Plans
Schedule of components of net periodic pension expense		U.S. Pension Plan						Non-U.S. Pension Plans
		Three Months Ended						Three Months Ended
		March 31,						March 31,
	(in thousands)	2015			2014			2015			2014
	Service cost	$	1,700		$	950		$	5,202		$	4,153
	Interest cost	3,799			7,919			6,641			8,804
	Expected return on assets	(5,275		)	(7,526		)	(12,305		)	(12,248		)
	Amortization of prior service cost	217			187			(206		)	—
	Recognized net actuarial loss	2,351			1,109			1,939			1,984
	Net periodic pension expense	$	2,792		$	2,639		$	1,271		$	2,693

Financing_Arrangements_Tables

Financing Arrangements (Tables)	3 Months Ended
	Mar. 31, 2015
Financing Arrangements
Schedule of liability and equity components of 2004 Notes		March 31,		December 31,
	(in thousands)	2015		2014

	Carrying value of the equity component	$	19,516	$	19,516
	Principal amount and carrying value of the liability component	18,324		18,324

Operating_Informatin_by_Segmen

Operating Informatin by Segment (Tables)	3 Months Ended
	Mar. 31, 2015
Operating Information by Segment
Schedule of External Revenue, Segment Profit (Loss) and Total Assets by Segment
			Three Months Ended
			March 31,
	External Revenue (in millions)		2015			2014
	Oil & Gas		$	2,471.60		$	2,782.80
	Industrial & Infrastructure		1,080.20			1,615.70
	Government		646			593.2
	Global Services		129.7			142
	Power		221.1			250.9
	Total external revenue		$	4,548.60		$	5,384.60
			Three Months Ended
			March 31,
	Segment Profit (Loss) (in millions)		2015			2014
	Oil & Gas		$	183.3		$	139.1
	Industrial & Infrastructure		71.1			97.2
	Government		14.8			12.5
	Global Services		15.3			20.7
	Power		(8.6		)	(1.4		)
	Total segment profit		$	275.9		$	268.1
			March 31,			December 31,
	Total Assets by Segment (in millions)		2015			2014
	Oil & Gas		$	1,476.50		$	1,745.30
	Industrial & Infrastructure		842.2			848.2
	Government		510.1			540.1
	Global Services		763.2			781.9
	Power		196.4			178.6


Reconciliation of Total Segment Profit to Earnings Before Taxes		Three Months Ended
		March 31,
	Reconciliation of Total Segment Profit to Earnings Before Taxes (in millions)	2015			2014
	Total segment profit	$	275.9		$	268.1
	Corporate general and administrative expense	(41.1		)	(37.8		)
	Interest income (expense), net	(7.4		)	(3.0		)
	Earnings attributable to noncontrolling interests	21.5			44.2
	Earnings before taxes	$	248.9		$	271.5

Other_Comprehensive_Income_Los2

Other Comprehensive Income (Loss) (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Other comprehensive income (loss), Before-Tax Amount:
Total other comprehensive loss, Before-Tax	($77,584)	($16,782)
Less: Other comprehensive income (loss) attributable to noncontrolling interests, Before-Tax	591	-4,339
Other comprehensive loss attributable to Fluor Corporation, Before-Tax	-78,175	-12,443
Other comprehensive income (loss), Tax Benefit (Expense):
Total other comprehensive loss, Tax Benefit (Expense)	28,570	3,256
Other comprehensive loss attributable to Fluor Corporation, Tax Benefit (Expense)	28,570	3,256
Other comprehensive income (loss), Net-of-Tax Amount:
Total other comprehensive loss, Net-of-Tax	-49,014	-13,526
Less: Other comprehensive income (loss) attributable to noncontrolling interests, Net-of-Tax	591	-4,339
Other comprehensive loss attributable to Fluor Corporation, Net-of-Tax	-49,605	-9,187
Foreign Currency Translation
Other comprehensive income (loss), Before-Tax Amount:
Total other comprehensive loss, Before-Tax	-78,271	-17,800
Other comprehensive income (loss), Tax Benefit (Expense):
Total other comprehensive loss, Tax Benefit (Expense)	29,547	5,071
Other comprehensive income (loss), Net-of-Tax Amount:
Total other comprehensive loss, Net-of-Tax	-48,724	-12,729
Less: Other comprehensive income (loss) attributable to noncontrolling interests, Net-of-Tax	520	-4,278
Other comprehensive loss attributable to Fluor Corporation, Net-of-Tax	-49,244	-8,451
Ownership Share of Equity Method Investees' Other Comprehensive Loss
Other comprehensive income (loss), Before-Tax Amount:
Total other comprehensive loss, Before-Tax	-6,002	-944
Other comprehensive income (loss), Tax Benefit (Expense):
Total other comprehensive loss, Tax Benefit (Expense)	1,521	-1,054
Other comprehensive income (loss), Net-of-Tax Amount:
Total other comprehensive loss, Net-of-Tax	-4,481	-1,998
Other comprehensive loss attributable to Fluor Corporation, Net-of-Tax	-4,481	-1,998
Defined Benefit Pension and Postretirement Plans
Other comprehensive income (loss), Before-Tax Amount:
Total other comprehensive loss, Before-Tax	4,301	2,636
Other comprehensive income (loss), Tax Benefit (Expense):
Total other comprehensive loss, Tax Benefit (Expense)	-1,613	-988
Other comprehensive income (loss), Net-of-Tax Amount:
Total other comprehensive loss, Net-of-Tax	2,688	1,648
Other comprehensive loss attributable to Fluor Corporation, Net-of-Tax	2,688	1,648
Unrealized Gain (Loss) on Derivative Contracts
Other comprehensive income (loss), Before-Tax Amount:
Total other comprehensive loss, Before-Tax	1,414	-645
Other comprehensive income (loss), Tax Benefit (Expense):
Total other comprehensive loss, Tax Benefit (Expense)	-520	216
Other comprehensive income (loss), Net-of-Tax Amount:
Total other comprehensive loss, Net-of-Tax	894	-429
Less: Other comprehensive income (loss) attributable to noncontrolling interests, Net-of-Tax	71	-61
Other comprehensive loss attributable to Fluor Corporation, Net-of-Tax	823	-368
Unrealized Gain (Loss) on Available-for-Sale Securities
Other comprehensive income (loss), Before-Tax Amount:
Total other comprehensive loss, Before-Tax	974	-29
Other comprehensive income (loss), Tax Benefit (Expense):
Total other comprehensive loss, Tax Benefit (Expense)	-365	11
Other comprehensive income (loss), Net-of-Tax Amount:
Total other comprehensive loss, Net-of-Tax	609	-18
Other comprehensive loss attributable to Fluor Corporation, Net-of-Tax	$609	($18)

Other_Comprehensive_Income_Los3

Other Comprehensive Income (Loss) (Details 2) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Changes in AOCI balances by component (after-tax)
Accumulated Other Comprehensive Income (Loss), Net, balance as of beginning of year	($484,212)	($298,201)
Other comprehensive income (loss) before reclassifications	-52,451	-11,422
Amounts reclassified from AOCI	2,846	2,235
Other comprehensive loss attributable to Fluor Corporation, Net-of-Tax	-49,605	-9,187
Accumulated Other Comprehensive Income (Loss), Net, balance as of end of period	-533,817	-307,388
Foreign Currency Translation
Changes in AOCI balances by component (after-tax)
Accumulated Other Comprehensive Income (Loss), Net, balance as of beginning of year	-119,416	-164
Other comprehensive income (loss) before reclassifications	-49,244	-8,451
Other comprehensive loss attributable to Fluor Corporation, Net-of-Tax	-49,244	-8,451
Accumulated Other Comprehensive Income (Loss), Net, balance as of end of period	-168,660	-8,615
Ownership Share of Equity Method Investees' Other Comprehensive Loss
Changes in AOCI balances by component (after-tax)
Accumulated Other Comprehensive Income (Loss), Net, balance as of beginning of year	-30,436	-32,274
Other comprehensive income (loss) before reclassifications	-4,481	-1,998
Other comprehensive loss attributable to Fluor Corporation, Net-of-Tax	-4,481	-1,998
Accumulated Other Comprehensive Income (Loss), Net, balance as of end of period	-34,917	-34,272
Defined Benefit Pension and Postretirement Plans
Changes in AOCI balances by component (after-tax)
Accumulated Other Comprehensive Income (Loss), Net, balance as of beginning of year	-325,145	-258,297
Other comprehensive income (loss) before reclassifications		-403
Amounts reclassified from AOCI	2,688	2,051
Other comprehensive loss attributable to Fluor Corporation, Net-of-Tax	2,688	1,648
Accumulated Other Comprehensive Income (Loss), Net, balance as of end of period	-322,457	-256,649
Unrealized Gain (Loss) on Derivative Contracts
Changes in AOCI balances by component (after-tax)
Accumulated Other Comprehensive Income (Loss), Net, balance as of beginning of year	-8,954	-7,642
Other comprehensive income (loss) before reclassifications	596	-544
Amounts reclassified from AOCI	227	176
Other comprehensive loss attributable to Fluor Corporation, Net-of-Tax	823	-368
Accumulated Other Comprehensive Income (Loss), Net, balance as of end of period	-8,131	-8,010
Unrealized Gain (Loss) on Available-for-Sale Securities
Changes in AOCI balances by component (after-tax)
Accumulated Other Comprehensive Income (Loss), Net, balance as of beginning of year	-261	176
Other comprehensive income (loss) before reclassifications	678	-26
Amounts reclassified from AOCI	-69	8
Other comprehensive loss attributable to Fluor Corporation, Net-of-Tax	609	-18
Accumulated Other Comprehensive Income (Loss), Net, balance as of end of period	$348	$158

Other_Comprehensive_Income_Los4

Other Comprehensive Income (Loss) (Details 3) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Changes in AOCI balances by component (after-tax) attributable to Noncontrolling Interest
Accumulated Other Comprehensive Income (Loss), Net, Attributable to Noncontrolling Interests, balance as of beginning of year	$643	$7,952
Other comprehensive income (loss) before reclassifications attributable to noncontrolling interests	517	-4,342
Amount reclassified from AOCI attributable to noncontrolling interests	74	3
Net other comprehensive income (loss) attributable to noncontrolling interests	591	-4,339
Accumulated Other Comprehensive Income (Loss), Net, Attributable to Noncontrolling Interests, balance as of end of period	1,234	3,613
Foreign Currency Translation
Changes in AOCI balances by component (after-tax) attributable to Noncontrolling Interest
Accumulated Other Comprehensive Income (Loss), Net, Attributable to Noncontrolling Interests, balance as of beginning of year	1,328	7,885
Other comprehensive income (loss) before reclassifications attributable to noncontrolling interests	520	-4,278
Net other comprehensive income (loss) attributable to noncontrolling interests	520	-4,278
Accumulated Other Comprehensive Income (Loss), Net, Attributable to Noncontrolling Interests, balance as of end of period	1,848	3,607
Unrealized Gain (Loss) on Derivative Contracts
Changes in AOCI balances by component (after-tax) attributable to Noncontrolling Interest
Accumulated Other Comprehensive Income (Loss), Net, Attributable to Noncontrolling Interests, balance as of beginning of year	-685	67
Other comprehensive income (loss) before reclassifications attributable to noncontrolling interests	-3	-64
Amount reclassified from AOCI attributable to noncontrolling interests	74	3
Net other comprehensive income (loss) attributable to noncontrolling interests	71	-61
Accumulated Other Comprehensive Income (Loss), Net, Attributable to Noncontrolling Interests, balance as of end of period	($614)	$6

Other_Comprehensive_Income_Los5

Other Comprehensive Income (Loss) (Details 4) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Reclassifications out of accumulated other comprehensive income (loss)
Total cost of revenue	($4,251,189)	($5,072,304)
Interest expense	-12,168	-6,897
Corporate general and administrative expense	-41,110	-37,773
Income tax expense	-83,274	-78,158
NET EARNINGS	165,604	193,310
Net earnings attributable to noncontrolling interests	21,525	44,236
NET EARNINGS ATTRIBUTABLE TO FLUOR CORPORATION	144,079	149,074
Defined Benefit Pension and Postretirement Plans \| Reclassified out of AOCI
Reclassifications out of accumulated other comprehensive income (loss)
Various accounts, primarily cost of revenue and corporate general and administrative expense	-4,301	-3,281
Income tax expense	1,613	1,230
NET EARNINGS	-2,688	-2,051
Unrealized Gain (Loss) on Derivative Contracts \| Reclassified out of AOCI
Reclassifications out of accumulated other comprehensive income (loss)
Income tax expense	180	111
NET EARNINGS	-301	-179
Net earnings attributable to noncontrolling interests	-74	-3
NET EARNINGS ATTRIBUTABLE TO FLUOR CORPORATION	-227	-176
Unrealized Gain (Loss) on Derivative Contracts \| Reclassified out of AOCI \| Commodity contracts and foreign currency contracts
Reclassifications out of accumulated other comprehensive income (loss)
Total cost of revenue	-62	129
Unrealized Gain (Loss) on Derivative Contracts \| Reclassified out of AOCI \| Interest rate contracts
Reclassifications out of accumulated other comprehensive income (loss)
Interest expense	-419	-419
Unrealized Gain (Loss) on Available-for-Sale Securities \| Reclassified out of AOCI
Reclassifications out of accumulated other comprehensive income (loss)
Corporate general and administrative expense	110	-13
Income tax expense	-41	5
NET EARNINGS	$69	($8)

Income_Taxes_Details

Income Taxes (Details)	3 Months Ended
Income Taxes (Details)	Mar. 31, 2015	Mar. 31, 2014
Income Taxes
Effective tax rate, continuing operations (as a percent)	33.50%	28.80%

Cash_Paid_for_Interest_and_Tax1

Cash Paid for Interest and Taxes (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Cash paid during the year for:
Cash paid for interest	$10	$10
Income taxes payments, net of refunds	$62	$37

Earnings_Per_Share_Details

Earnings Per Share (Details) (USD $)	3 Months Ended
Earnings Per Share (Details) (USD $)	Mar. 31, 2015	Mar. 31, 2014
Amounts attributable to Fluor Corporation:
Net earnings attributable to Fluor Corporation	$144,079,000	$149,074,000
Basic EPS attributable to Fluor Corporation:
Weighted average common shares outstanding (in shares)	147,731,000	160,213,000
Basic earnings per share (in dollars per share)	$0.98	$0.93
Diluted EPS attributable to Fluor Corporation:
Weighted average common shares outstanding (in shares)	147,731,000	160,213,000
Diluted effect:
Employee stock options, restricted stock units and shares and Value Driver Incentive units (in shares)	1,825,000	1,709,000
Conversion equivalent of dilutive convertible debt (in shares)	359,000	438,000
Weighted average diluted shares outstanding (in shares)	149,915,000	162,360,000
Diluted EPS attributable to Fluor Corporation
Diluted earnings per share (in dollars per share)	$0.96	$0.92
Anti-dilutive securities not included above (in shares)	3,162,000	440,000
Repurchases of common stock
Common stock repurchased and cancelled, shares (in shares)	1,939,997	2,461,800
Common stock repurchased and cancelled, amount (in dollars)	$112,000,000	$192,000,000

Fair_Value_of_Financial_Instru2

Fair Value of Financial Instruments (Details) (USD $)	0 Months Ended		3 Months Ended
Fair Value of Financial Instruments (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Fair value of assets and liabilities measured on recurring basis
Deferred compensation trusts	$371,418,000	$405,022,000	$371,418,000		$405,022,000
Other-than-temporary impairment of available-for-sale securities	0	0
Proceeds from the sales and maturities of available-for-sale securities			183,000,000	64,000,000
Marketable securities, available-for-sale \| Minimum
Fair value of assets and liabilities measured on recurring basis
Debt securities maturity period			1 year
Marketable securities, available-for-sale \| Maximum
Fair value of assets and liabilities measured on recurring basis
Debt securities maturity period			3 years
Fair Value, Measurements, Recurring \| Money market funds
Fair value of assets and liabilities measured on recurring basis
Available-for-sale securities	7,000,000	14,000,000	7,000,000		14,000,000
Fair Value, Measurements, Recurring \| U.S. agency securities
Fair value of assets and liabilities measured on recurring basis
Available-for-sale securities	56,000,000	73,000,000	56,000,000		73,000,000
Fair Value, Measurements, Recurring \| U.S. Treasury securities
Fair value of assets and liabilities measured on recurring basis
Available-for-sale securities	60,000,000	107,000,000	60,000,000		107,000,000
Fair Value, Measurements, Recurring \| Corporate debt securities
Fair value of assets and liabilities measured on recurring basis
Available-for-sale securities	204,000,000	245,000,000	204,000,000		245,000,000
Fair Value, Measurements, Recurring \| Fair Value
Fair value of assets and liabilities measured on recurring basis
Cash and cash equivalents	7,269,000	14,419,000	7,269,000		14,419,000
Marketable securities, current	64,937,000	80,706,000	64,937,000		80,706,000
Deferred compensation trusts	54,913,000	94,893,000	54,913,000		94,893,000
Marketable securities, noncurrent	254,761,000	343,644,000	254,761,000		343,644,000
Fair Value, Measurements, Recurring \| Fair Value \| Commodity contracts
Fair value of assets and liabilities measured on recurring basis
Derivative assets	315,000	561,000	315,000		561,000
Derivative liabilities	2,000,000	2,290,000	2,000,000		2,290,000
Fair Value, Measurements, Recurring \| Fair Value \| Foreign currency contracts
Fair value of assets and liabilities measured on recurring basis
Derivative assets	2,710,000	180,000	2,710,000		180,000
Derivative liabilities	3,670,000	4,392,000	3,670,000		4,392,000
Fair Value, Measurements, Recurring \| Level 1
Fair value of assets and liabilities measured on recurring basis
Cash and cash equivalents	7,269,000	14,419,000	7,269,000		14,419,000
Deferred compensation trusts	54,913,000	94,893,000	54,913,000		94,893,000
Fair Value, Measurements, Recurring \| Level 2
Fair value of assets and liabilities measured on recurring basis
Marketable securities, current	64,937,000	80,706,000	64,937,000		80,706,000
Marketable securities, noncurrent	254,761,000	343,644,000	254,761,000		343,644,000
Fair Value, Measurements, Recurring \| Level 2 \| Commodity contracts
Fair value of assets and liabilities measured on recurring basis
Derivative assets	315,000	561,000	315,000		561,000
Derivative liabilities	2,000,000	2,290,000	2,000,000		2,290,000
Fair Value, Measurements, Recurring \| Level 2 \| Foreign currency contracts
Fair value of assets and liabilities measured on recurring basis
Derivative assets	2,710,000	180,000	2,710,000		180,000
Derivative liabilities	$3,670,000	$4,392,000	$3,670,000		$4,392,000

Fair_Value_of_Financial_Instru3

Fair Value of Financial Instruments (Details 2) (USD $)	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2011	Nov. 30, 2014	Feb. 29, 2004
In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2011	Nov. 30, 2014	Feb. 29, 2004
3.375% Senior Notes
Estimated fair values of the company's financial instruments that are not measured at fair value on a recurring basis
Interest rate (as a percent)	3.38%	3.38%	3.38%
3.5% Senior Notes
Estimated fair values of the company's financial instruments that are not measured at fair value on a recurring basis
Interest rate (as a percent)	3.50%	3.50%		3.50%
1.5% Convertible Senior Notes due February 15, 2024
Estimated fair values of the company's financial instruments that are not measured at fair value on a recurring basis
Interest rate (as a percent)	1.50%	1.50%			1.50%
Carrying Value
Estimated fair values of the company's financial instruments that are not measured at fair value on a recurring basis
Cash	1,034,253	1,224,834
Cash equivalents	769,771	753,872
Marketable securities, current	80,631	24,425
Notes receivable, including noncurrent portion	17,614	19,284
Carrying Value \| Other borrowings
Estimated fair values of the company's financial instruments that are not measured at fair value on a recurring basis
Debt	9,716	10,418
Carrying Value \| 3.375% Senior Notes
Estimated fair values of the company's financial instruments that are not measured at fair value on a recurring basis
Debt	497,155	497,045
Carrying Value \| 3.5% Senior Notes
Estimated fair values of the company's financial instruments that are not measured at fair value on a recurring basis
Debt	494,774	494,640
Carrying Value \| 1.5% Convertible Senior Notes due February 15, 2024
Estimated fair values of the company's financial instruments that are not measured at fair value on a recurring basis
Debt	18,324	18,324
Fair Value \| Level 1
Estimated fair values of the company's financial instruments that are not measured at fair value on a recurring basis
Cash	1,034,253	1,224,834
Fair Value \| Level 2
Estimated fair values of the company's financial instruments that are not measured at fair value on a recurring basis
Cash equivalents	796,771	753,872
Marketable securities, current	80,631	24,425
Fair Value \| Level 2 \| Other borrowings
Estimated fair values of the company's financial instruments that are not measured at fair value on a recurring basis
Debt	9,716	10,418
Fair Value \| Level 2 \| 3.375% Senior Notes
Estimated fair values of the company's financial instruments that are not measured at fair value on a recurring basis
Debt	519,925	510,465
Fair Value \| Level 2 \| 3.5% Senior Notes
Estimated fair values of the company's financial instruments that are not measured at fair value on a recurring basis
Debt	515,545	498,914
Fair Value \| Level 2 \| 1.5% Convertible Senior Notes due February 15, 2024
Estimated fair values of the company's financial instruments that are not measured at fair value on a recurring basis
Debt	38,333	40,826
Fair Value \| Level 3
Estimated fair values of the company's financial instruments that are not measured at fair value on a recurring basis
Notes receivable, including noncurrent portion	17,614	19,284

Derivatives_and_Hedging_Detail

Derivatives and Hedging (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
Commodity contracts
Derivatives, Fair Value
Total gross notional amount	$10,000,000
Foreign currency contracts
Derivatives, Fair Value
Total gross notional amount	636,000,000
Designated as Hedging Instrument
Derivatives, Fair Value
Asset Derivatives	3,025,000	741,000
Liability Derivatives	5,670,000	6,682,000
Designated as Hedging Instrument \| Commodity contracts \| Other current assets
Derivatives, Fair Value
Asset Derivatives	106,000	365,000
Designated as Hedging Instrument \| Commodity contracts \| Other assets
Derivatives, Fair Value
Asset Derivatives	209,000	196,000
Designated as Hedging Instrument \| Commodity contracts \| Other accrued liabilities
Derivatives, Fair Value
Liability Derivatives	1,057,000	1,362,000
Designated as Hedging Instrument \| Commodity contracts \| Noncurrent liabilities
Derivatives, Fair Value
Liability Derivatives	943,000	928,000
Designated as Hedging Instrument \| Foreign currency contracts \| Other current assets
Derivatives, Fair Value
Asset Derivatives	1,422,000	128,000
Designated as Hedging Instrument \| Foreign currency contracts \| Other assets
Derivatives, Fair Value
Asset Derivatives	1,288,000	52,000
Designated as Hedging Instrument \| Foreign currency contracts \| Other accrued liabilities
Derivatives, Fair Value
Liability Derivatives	1,755,000	3,721,000
Designated as Hedging Instrument \| Foreign currency contracts \| Noncurrent liabilities
Derivatives, Fair Value
Liability Derivatives	$1,915,000	$671,000

Derivatives_and_Hedging_Detail1

Derivatives and Hedging (Details 2) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Derivative Instruments, Gain (Loss)
After-tax amount of gain (loss) recognized in OCI	$596	($544)
After-tax amount of gain (loss) reclassified from AOCI into earnings	-227	-176
Commodity contracts
Derivative Instruments, Gain (Loss)
After-tax amount of gain (loss) recognized in OCI	-112	-143
Commodity contracts \| Total cost of revenue
Derivative Instruments, Gain (Loss)
After-tax amount of gain (loss) reclassified from AOCI into earnings	-91	78
Foreign currency contracts
Derivative Instruments, Gain (Loss)
After-tax amount of gain (loss) recognized in OCI	708	-401
Foreign currency contracts \| Corporate general and administrative expense
Derivative Instruments, Gain (Loss)
Net Gains Recognized in Earnings	-1,154	1,259
Foreign currency contracts \| Total cost of revenue
Derivative Instruments, Gain (Loss)
After-tax amount of gain (loss) reclassified from AOCI into earnings	126	8
Interest rate contracts \| Interest expense
Derivative Instruments, Gain (Loss)
After-tax amount of gain (loss) reclassified from AOCI into earnings	($262)	($262)

Retirement_Benefits_Details

Retirement Benefits (Details) (USD $)	3 Months Ended	12 Months Ended	3 Months Ended
Retirement Benefits (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014
Defined Benefit Pension Plans
Estimated future employer contributions to defined benefit pension plans
Company contributions	$900,000
Defined Benefit Pension Plans \| Maximum
Estimated future employer contributions to defined benefit pension plans
Expected contributions in next fiscal year		100,000,000
Defined Benefit U.S. Pension Plans
Retirement benefits
Unrecognized net actuarial losses classified in accumulated other comprehensive loss	271,000,000
Net periodic pension expense for defined benefit pension plans
Service cost	1,700,000		950,000
Interest cost	3,799,000		7,919,000
Expected return on assets	-5,275,000		-7,526,000
Amortization of prior service cost	217,000		187,000
Recognized net actuarial loss	2,351,000		1,109,000
Net periodic pension expense	2,792,000		2,639,000
Defined Benefit Non-U.S. Pension Plans
Net periodic pension expense for defined benefit pension plans
Service cost	5,202,000		4,153,000
Interest cost	6,641,000		8,804,000
Expected return on assets	-12,305,000		-12,248,000
Amortization of prior service cost	-206,000
Recognized net actuarial loss	1,939,000		1,984,000
Net periodic pension expense	$1,271,000		$2,693,000

Financing_Arrangements_Details

Financing Arrangements (Details) (USD $)	1 Months Ended	3 Months Ended	1 Months Ended
Financing Arrangements (Details) (USD $)	Nov. 30, 2014	Mar. 31, 2015	Sep. 30, 2011	Feb. 29, 2004	Dec. 31, 2014
3.5% Senior Notes
Financing Arrangements
Debt issued	$500,000,000
Interest rate (as a percent)	3.50%	3.50%			3.50%
Proceeds from issuance of notes, net of underwriting discounts	491,000,000
3.5% Senior Notes \| Change of control triggering event
Financing Arrangements
Redemption price as a percentage of principal		101.00%
3.375% Senior Notes
Financing Arrangements
Debt issued			500,000,000
Interest rate (as a percent)		3.38%	3.38%		3.38%
Proceeds from issuance of notes, net of underwriting discounts			492,000,000
3.375% Senior Notes \| Change of control triggering event
Financing Arrangements
Redemption price as a percentage of principal		101.00%
3.375% Senior Notes \| Minimum
Financing Arrangements
Redemption price as a percentage of principal		100.00%
1.5% Convertible Senior Notes due February 15, 2024
Financing Arrangements
Debt issued				330,000,000
Interest rate (as a percent)		1.50%		1.50%	1.50%
Proceeds from issuance of notes, net of underwriting discounts				323,000,000
Redemption price as a percentage of principal		100.00%
Lines of credit
Financing Arrangements
Maximum borrowing capacity		5,300,000,000
Committed lines of credit
Financing Arrangements
Maximum borrowing capacity		3,500,000,000
Committed lines of credit \| May 2014 Revolving Loan and Letter of Credit Facility Agreement, due May 2019
Financing Arrangements
Maximum borrowing capacity		1,700,000,000
Maximum borrowing capacity additional amount, subject to certain conditions		500,000,000
Committed lines of credit \| May 2014 Revolving Loan and Letter of Credit Facility Agreement, due May 2019 \| Maximum
Financing Arrangements
Ratio of consolidated debt to tangible net worth		1
Committed lines of credit \| May 2014 Revolving Loan and Letter of Credit Facility Agreement, due May 2019 \| Maximum \| Subsidiaries
Financing Arrangements
Aggregate amount of debt		750,000,000
Committed lines of credit \| November 2012 Revolving Loan and Letter of Credit Facility Agreement, as amended, due May 2019
Financing Arrangements
Maximum borrowing capacity		1,800,000,000
Maximum borrowing capacity additional amount, subject to certain conditions		500,000,000
Committed lines of credit \| November 2012 Revolving Loan and Letter of Credit Facility Agreement, as amended, due May 2019 \| Maximum
Financing Arrangements
Ratio of consolidated debt to tangible net worth		1
Committed lines of credit \| November 2012 Revolving Loan and Letter of Credit Facility Agreement, as amended, due May 2019 \| Maximum \| Subsidiaries
Financing Arrangements
Aggregate amount of debt		750,000,000
Committed lines of credit \| Revolving advances
Financing Arrangements
Maximum borrowing capacity		1,750,000,000
Prior to September 15, 2024 \| 3.5% Senior Notes \| Minimum
Financing Arrangements
Redemption price as a percentage of principal		100.00%
On or after September 15, 2024 \| 3.5% Senior Notes
Financing Arrangements
Redemption price as a percentage of principal		100.00%

Financing_Arrangements_Details1

Financing Arrangements (Details 2) (USD $)	3 Months Ended
Financing Arrangements (Details 2) (USD $)	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Financing Arrangements
Common stock, par value (in dollars per share)	$0.01		$0.01
1.5% Convertible Senior Notes due February 15, 2024
Financing Arrangements
Carrying value of the equity component	$19,516,000		$19,516,000
Principal amount and carrying value of the liability component	18,324,000		18,324,000
Conversion rate per $1,000 principal amount of Notes (in shares)	37.0997
If-converted value	39,000,000
1.5% Convertible Senior Notes due February 15, 2024 \| Maximum
Financing Arrangements
Debt instrument, coupon interest	$100,000	$100,000

Financing_Arrangements_Details2

Financing Arrangements (Details 3) (Lines of credit, USD $)	Mar. 31, 2015	Dec. 31, 2014
In Millions, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Lines of credit
Short-term credit facility
Outstanding borrowings under short-term facility	$9	$10

StockBased_Plans_Details

Stock-Based Plans (Details) (Executives, USD $)	3 Months Ended
Stock-Based Plans (Details) (Executives, USD $)	Mar. 31, 2015	Mar. 31, 2014
Restricted stock units
Stock Plans
Granted (in shares)	520,947	357,138
Granted, weighted average grant date fair value (in dollars per share)	$59.05	$79.19
Vesting period	3 years	3 years
Stock Options
Stock Plans
Granted (in shares)	963,288	684,486
Granted (in dollars per share)	$59.05	$79.19
Vesting period	3 years	3 years
Term of stock-based award	10 years	10 years
Performance-based VDI units
Stock Plans
Granted (in shares)	430,970	315,551
Granted, weighted average grant date fair value (in dollars per share)	$59.05	$79.19
Vesting period	3 years	3 years

Noncontrolling_Interests_Detai

Noncontrolling Interests (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Noncontrolling Interests.
Net earnings attributable to noncontrolling interests	$21,525	$44,236
Distributions paid to noncontrolling interests	3,508	15,898
Capital contributions by noncontrolling interests	$698	$46

Contingencies_and_Commitments_

Contingencies and Commitments (Details) (St. Joe and Doe Run, USD $)	1 Months Ended			0 Months Ended
In Millions, unless otherwise specified	Jul. 31, 2011	Jan. 31, 2015	Jun. 30, 2014	Oct. 31, 2014
	plaintiff	Jan. 31, 2015	Jun. 30, 2014	plaintiff
St. Joe and Doe Run December 2010 litigation
Litigation and dispute resolution
Number of plaintiffs	16
Compensatory and economic damages	$38.50
Punitive damages	320
St. Joe and Doe Run December 2010 litigation, December 2011 judgment, appeal and opinion
Litigation and dispute resolution
Compensatory and economic damages			38.5
Punitive damages reversed and remanded back to trial court			240
Punitive damages			80
Payment pursuant to settlement agreement		$306
St. Joe and Doe Run December 2010 litigation, December 2011 judgment, appeal and opinion \| Minimum
Litigation and dispute resolution
Number of plaintiffs				16

Contingencies_and_Commitments_1

Contingencies and Commitments (Details 2) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Millions, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Recognized claims against clients
Contracts receivable, claims and uncertain amounts	$21	$21

Guarantees_Details

Guarantees (Details) (Performance Guarantee, USD $)	Mar. 31, 2015
In Billions, unless otherwise specified	Mar. 31, 2015
Performance Guarantee
Guarantees
Estimated performance guarantees outstanding	$15.50

Variable_Interest_Entities_Det

Variable Interest Entities (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Partnership \| Majority
Variable interest entity information
Entity's interest in joint venture (as a percent)	50.00%
Joint ventures \| Majority
Variable interest entity information
Entity's interest in joint venture (as a percent)	50.00%
Unconsolidated variable interest entities
Variable interest entity information
Net carrying value of the unconsolidated VIEs	131	$107
Unconsolidated variable interest entities \| Future funding commitment
Variable interest entity information
Future funding amount	20
Consolidated variable interest entities
Variable interest entity information
Carrying value of assets	977	891
Carrying value of liabilities	471	$442

Operating_Information_by_Segme1

Operating Information by Segment (Details) (USD $)	3 Months Ended
Operating Information by Segment (Details) (USD $)	Mar. 31, 2015	Mar. 31, 2014
Operating information by segment
Revenue	$4,548,649,000	$5,384,636,000
Oil and Gas Segment
Operating information by segment
Revenue	2,471,600,000	2,782,800,000
Industrial and Infrastructure Segment
Operating information by segment
Revenue	1,080,200,000	1,615,700,000
Government Segment
Operating information by segment
Revenue	646,000,000	593,200,000
Global Services Segment
Operating information by segment
Revenue	129,700,000	142,000,000
Power Segment
Operating information by segment
Revenue	221,100,000	250,900,000
Intercompany \| Global Services Segment
Operating information by segment
Revenue	115,000,000	136,000,000
Reportable segments
Operating information by segment
Profit (Loss)	275,900,000	268,100,000
Reportable segments \| Oil and Gas Segment
Operating information by segment
Profit (Loss)	183,300,000	139,100,000
Reportable segments \| Industrial and Infrastructure Segment
Operating information by segment
Profit (Loss)	71,100,000	97,200,000
Reportable segments \| Government Segment
Operating information by segment
Profit (Loss)	14,800,000	12,500,000
Reportable segments \| Global Services Segment
Operating information by segment
Profit (Loss)	15,300,000	20,700,000
Reportable segments \| Power Segment
Operating information by segment
Profit (Loss)	-8,600,000	-1,400,000
Reportable segments \| Power Segment \| Nu Scale Power
Additional operating information by segment
Expenses	17,000,000	13,000,000
Reportable segments \| Power Segment \| Nu Scale Power \| Cost-sharing agreement, research and development activities \| U.S. Department of Energy
Additional operating information by segment
Qualified reimbursable expenses	$14,000,000

Operating_Information_by_Segme2

Operating Information by Segment (Details 2) (USD $)	3 Months Ended
Operating Information by Segment (Details 2) (USD $)	Mar. 31, 2015	Mar. 31, 2014
Reconciliation of total segment profit to earnings before taxes
Corporate general and administrative expense	($41,110,000)	($37,773,000)
Interest income (expense), net	-7,400,000	-3,000,000
Earnings before taxes	248,878,000	271,468,000
Reportable segments
Reconciliation of total segment profit to earnings before taxes
Segment profit	275,900,000	268,100,000
Reconciling item \| Noncontrolling interests
Reconciliation of total segment profit to earnings before taxes
Earnings before taxes	$21,500,000	$44,200,000

Operating_Information_by_Segme3

Operating Information by Segment (Details 3) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Operations by Business Segment and Geographical Area
Total assets	$7,619,196	$8,194,429
Reportable segments \| Oil and Gas Segment
Operations by Business Segment and Geographical Area
Total assets	1,476,500	1,745,300
Reportable segments \| Industrial and Infrastructure Segment
Operations by Business Segment and Geographical Area
Total assets	842,200	848,200
Reportable segments \| Government Segment
Operations by Business Segment and Geographical Area
Total assets	510,100	540,100
Reportable segments \| Global Services Segment
Operations by Business Segment and Geographical Area
Total assets	763,200	781,900
Reportable segments \| Power Segment
Operations by Business Segment and Geographical Area
Total assets	$196,400	$178,600