Fluor (FLR) 10-K 18 Feb 15 2014 FY Annual report Financial data

Document_and_Entity_Informatio

Document and Entity Information (USD $)	12 Months Ended
In Billions, except Share data, unless otherwise specified	Dec. 31, 2014	Feb. 11, 2015	Jun. 30, 2014
Document and Entity Information
Entity Registrant Name	FLUOR CORP
Entity Central Index Key	1124198
Document Type	10-K
Document Period End Date	31-Dec-14
Amendment Flag	FALSE
Current Fiscal Year End Date	-19
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Entity Public Float			$12
Entity Common Stock, Shares Outstanding		147,789,519
Document Fiscal Year Focus	2014
Document Fiscal Period Focus	FY

CONSOLIDATED_STATEMENT_OF_EARN

CONSOLIDATED STATEMENT OF EARNINGS (USD $)	12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
CONSOLIDATED STATEMENT OF EARNINGS
TOTAL REVENUE	$21,531,577	$27,351,573	$27,577,135
TOTAL COST OF REVENUE	20,132,544	25,986,382	26,692,138
OTHER (INCOME) AND EXPENSES
Corporate general and administrative expense	182,711	175,148	151,010
Interest expense	29,681	26,887	28,238
Interest income	-18,268	-14,443	-27,756
Total cost and expenses	20,326,668	26,173,974	26,843,630
EARNINGS FROM CONTINUING OPERATIONS BEFORE TAXES	1,204,909	1,177,599	733,505
INCOME TAX EXPENSE	352,815	354,573	162,438
EARNINGS FROM CONTINUING OPERATIONS	852,094	823,026	571,067
LOSS FROM DISCONTINUED OPERATIONS, NET OF TAX	-204,551
NET EARNINGS	647,543	823,026	571,067
LESS: NET EARNINGS ATTRIBUTABLE TO NONCONTROLLING INTERESTS	136,634	155,315	114,737
NET EARNINGS ATTRIBUTABLE TO FLUOR CORPORATION	510,909	667,711	456,330
AMOUNTS ATTRIBUTABLE TO FLUOR CORPORATION
Earnings from continuing operations	715,460	667,711	456,330
Loss from discontinued operations, net of tax	-204,551
NET EARNINGS ATTRIBUTABLE TO FLUOR CORPORATION	$510,909	$667,711	$456,330
BASIC EARNINGS (LOSS) PER SHARE ATTRIBUTABLE TO FLUOR CORPORATION
Earnings from continuing operations (in dollars per share)	$4.54	$4.11	$2.73
Loss from discontinued operations, net of tax (in dollars per share)	($1.30)
Net earnings (in dollars per share)	$3.24	$4.11	$2.73
DILUTED EARNINGS (LOSS) PER SHARE ATTRIBUTABLE TO FLUOR CORPORATION
Earnings from continuing operations (in dollars per share)	$4.48	$4.06	$2.71
Loss from discontinued operations, net of tax (in dollars per share)	($1.28)
Net earnings (in dollars per share)	$3.20	$4.06	$2.71
SHARES USED TO CALCULATE EARNINGS PER SHARE
Basic (in shares)	157,487	162,566	167,121
Diluted (in shares)	159,616	164,354	168,491
DIVIDENDS DECLARED PER SHARE (in dollars per share)	$0.84	$0.64	$0.64

CONSOLIDATED_STATEMENT_OF_COMP

CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME
NET EARNINGS	$647,543	$823,026	$571,067
OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX:
Foreign currency translation adjustment	-125,809	-46,901	29,703
Ownership share of equity method investees' other comprehensive income	1,838	10,745	563
Defined benefit pension and postretirement plan adjustments	-66,848	-5,573	-91,155
Unrealized gain (loss) on derivative contracts	-2,064	1,384	1,298
Unrealized gain (loss) on available-for-sale securities	-437	-778	85
TOTAL OTHER COMPREHENSIVE LOSS, NET OF TAX	-193,320	-41,123	-59,506
COMPREHENSIVE INCOME	454,223	781,903	511,561
LESS: COMPREHENSIVE INCOME ATTRIBUTABLE TO NONCONTROLLING INTERESTS	129,325	154,543	113,789
COMPREHENSIVE INCOME ATTRIBUTABLE TO FLUOR CORPORATION	$324,898	$627,360	$397,772

CONSOLIDATED_BALANCE_SHEET

CONSOLIDATED BALANCE SHEET (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
CURRENT ASSETS
Cash and cash equivalents ($352,996 and $488,426 related to variable interest entities	$1,993,125	$2,283,582
Marketable securities, current ($14,082 and $64,084 related to VIEs)	105,131	186,023
Accounts and notes receivable, net ($193,565 and $220,705 related to VIEs)	1,471,705	1,274,024
Contract work in progress ($166,334 and $238,895 related to VIEs)	1,587,275	1,740,821
Deferred taxes	340,223	245,796
Other current assets ($38,848 and $27,798 related to VIEs)	260,588	273,437
Total current assets	5,758,047	6,003,683
PROPERTY, PLANT AND EQUIPMENT
Land	84,274	88,763
Buildings and improvements	454,641	458,582
Machinery and equipment	1,305,623	1,328,434
Furniture and fixtures	142,961	146,498
Construction in progress	73,962	51,601
Gross property, plant and equipment	2,061,461	2,073,878
Less accumulated depreciation	1,081,198	1,106,925
Net property, plant and equipment ($77,579 and $87,774 related to VIEs)	980,263	966,953
OTHER ASSETS
Marketable securities, noncurrent	343,644	275,402
Goodwill	112,952	114,107
Investments	189,805	198,186
Deferred taxes	201,004	139,773
Deferred compensation trusts	405,022	388,408
Other ($24,003 and $25,013 related to VIEs)	203,692	237,338
Total other assets	1,456,119	1,353,214
TOTAL ASSETS	8,194,429	8,323,850
CURRENT LIABILITIES
Trade accounts payable ($213,837 and $311,892 related to VIEs)	1,422,084	1,641,109
Convertible senior notes and other borrowings	28,742	29,839
Advance billings on contracts ($151,321 and $327,820 related to VIEs)	569,418	743,524
Accrued salaries, wages and benefits ($51,749 and $64,064 related to VIEs)	725,586	753,452
Other accrued liabilities ($21,709 and $25,517 related to VIEs)	585,023	239,236
Total current liabilities	3,330,853	3,407,160
LONG-TERM DEBT DUE AFTER ONE YEAR	991,685	496,604
NONCURRENT LIABILITIES	648,061	539,263
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 - 148,633,640 and 161,287,818 shares in 2014 and 2013, respectively	1,486	1,613
Additional paid-in capital		12,911
Accumulated other comprehensive loss	-484,212	-298,201
Retained earnings	3,593,597	4,040,664
Total shareholders' equity	3,110,871	3,756,987
Noncontrolling interests	112,959	123,836
Total equity	3,223,830	3,880,823
TOTAL LIABILITIES AND EQUITY	$8,194,429	$8,323,850

CONSOLIDATED_BALANCE_SHEET_Par

CONSOLIDATED BALANCE SHEET (Parenthetical) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, except Share data, unless otherwise specified
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)	148,633,640	161,287,818
Common stock, outstanding shares (in shares)	148,633,640	161,287,818
CURRENT ASSETS, VIEs
Cash and cash equivalents	$1,993,125	$2,283,582
Marketable securities, current	105,131	186,023
Accounts and notes receivable	1,471,705	1,274,024
Contract work in progress	1,587,275	1,740,821
Other current assets	260,588	273,437
Net property, plant and equipment	980,263	966,953
Other	203,692	237,338
CURRENT LIABILITIES, VIEs
Trade accounts payable	1,422,084	1,641,109
Advance billings on contracts	569,418	743,524
Accrued salaries, wages and benefits	725,586	753,452
Other accrued liabilities	585,023	239,236
Consolidated variable interest entities
CURRENT ASSETS, VIEs
Cash and cash equivalents	352,996	488,426
Marketable securities, current	14,082	64,084
Accounts and notes receivable	193,565	220,705
Contract work in progress	166,334	238,895
Other current assets	38,848	27,798
Net property, plant and equipment	77,579	87,774
Other	24,003	25,013
CURRENT LIABILITIES, VIEs
Trade accounts payable	213,837	311,892
Advance billings on contracts	151,321	327,820
Accrued salaries, wages and benefits	51,749	64,064
Other accrued liabilities	$21,709	$25,517

CONSOLIDATED_STATEMENT_OF_CASH

CONSOLIDATED STATEMENT OF CASH FLOWS (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
CASH FLOWS FROM OPERATING ACTIVITIES
Net earnings	$647,543	$823,026	$571,067
Adjustments to reconcile net earnings to cash provided (utilized) by operating activities:
Loss from discontinued operations, net of taxes	204,551
Depreciation of fixed assets	191,701	206,331	210,441
Amortization of intangibles	893	767	1,940
Loss (gain) on sale of equity method investments	2,158	-2,370	-42,856
(Earnings) loss from equity method investments, net of distributions	1,295	15,030	9,157
Gain on sale of property, plant and equipment	-33,878	-24,509	-24,607
Impairment of long-lived assets		5,406	10,434
Restricted stock and stock option amortization	48,232	42,909	37,400
Deferred compensation trust	-16,614	-55,504	-29,887
Deferred compensation obligation	14,755	56,550	35,961
Statute expirations and tax settlements	-19,331		-13,152
Deferred taxes	62,084	-29,708	77,444
Excess tax benefit from stock-based plans	-4,089	-6,668	-4,356
Net retirement plan accrual (contributions)	-40,093	10,586	-46,877
Changes in operating assets and liabilities	-408,861	-261,596	-195,510
Cash outflows from discontinued operations	-8,058
Other items	286	8,656	7,172
Cash provided by operating activities	642,574	788,906	603,771
CASH FLOWS FROM INVESTING ACTIVITIES
Purchases of marketable securities	-410,508	-492,633	-922,024
Proceeds from the sales and maturities of marketable securities	419,398	482,376	1,065,312
Capital expenditures	-324,704	-288,487	-254,747
Proceeds from disposal of property, plant and equipment	105,872	74,028	102,379
Proceeds from sales of equity and cost method investments	44,000	3,005	55,136
Investments in partnerships and joint ventures	-38,687	-27,057	-30,782
Consolidation of a variable interest entity		24,675
Acquisitions		-23,075	-19,337
Other items	5,514	12,558	-9,677
Cash utilized by investing activities	-199,115	-234,610	-13,740
CASH FLOWS FROM FINANCING ACTIVITIES
Repurchase of common stock	-906,083	-200,052	-389,233
Dividends paid	-126,218	-78,716	-128,650
Proceeds from issuance of 3.5% Senior Notes	494,595
Debt and credit facility issuance costs	-7,685		-3,241
Distributions paid to noncontrolling interests	-138,041	-124,853	-100,623
Capital contributions by noncontrolling interests	3,336	1,697	2,665
Taxes paid on vested restricted stock	-11,475	-11,404	-11,744
Stock options exercised	24,189	52,838	11,592
Excess tax benefit from stock-based plans	4,089	6,668	4,356
Other items	-3,049	10,688	5,766
Cash utilized by financing activities	-666,416	-369,569	-616,626
Effect of exchange rate changes on cash	-67,500	-55,686	19,725
Increase (decrease) in cash and cash equivalents	-290,457	129,041	-6,870
Cash and cash equivalents at beginning of year	2,283,582	2,154,541	2,161,411
Cash and cash equivalents at end of year	1,993,125	2,283,582	2,154,541
5.625% Municipal Bonds
CASH FLOWS FROM FINANCING ACTIVITIES
Repayment of debt		-17,795
Convertible debt and notes payable
CASH FLOWS FROM FINANCING ACTIVITIES
Repayment of debt	($74)	($8,640)	($7,514)

CONSOLIDATED_STATEMENT_OF_CASH1

CONSOLIDATED STATEMENT OF CASH FLOWS (Parenthetical)	Dec. 31, 2012
5.625% Municipal Bonds
Debt instruments
Debt interest rate (as a percent)	5.63%

CONSOLIDATED_STATEMENT_OF_CHAN

CONSOLIDATED STATEMENT OF CHANGES IN EQUITY (USD $)	Total Shareholders' Equity	Common Stock	Additional Paid-In Capital	Accumulated Other Comprehensive Income (Loss)	Retained Earnings	Noncontrolling Interests	Total
In Thousands, except Share data, unless otherwise specified
BALANCE at Dec. 31, 2011	$3,395,525	$1,690	$2,574	($199,292)	$3,590,553	$64,381	$3,459,906
BALANCE (in shares) at Dec. 31, 2011		168,979,000
Increase (Decrease) in Shareholders' Equity
Net earnings	456,330				456,330	114,737	571,067
Other comprehensive loss	-58,558			-58,558		-948	-59,506
Dividends ($0.84, $0.64 and $0.64 per share for the years ended December 31, 2014, 2013 and 2012, respectively)	-107,522				-107,522		-107,522
Distributions to noncontrolling interests						-100,623	-100,623
Partner contributions in noncontrolling interests						2,665	2,665
Acquisition and other noncontrolling interest transactions	-2,673		-2,673			5,587	2,914
Stock-based plan activity	47,421	9	47,412				47,421
Stock-based plan activity (in shares)		771,000
Repurchase of common stock	-389,233	-75	-47,318		-341,840		-389,233
Repurchase of common stock (in shares)		-7,409,000					-7,409,200
Debt conversions	5		5				5
Debt conversions (in shares)		19,000
BALANCE at Dec. 31, 2012	3,341,295	1,624		-257,850	3,597,521	85,799	3,427,094
BALANCE (in shares) at Dec. 31, 2012		162,360,000
Increase (Decrease) in Shareholders' Equity
Net earnings	667,711				667,711	155,315	823,026
Other comprehensive loss	-40,351			-40,351		-772	-41,123
Dividends ($0.84, $0.64 and $0.64 per share for the years ended December 31, 2014, 2013 and 2012, respectively)	-104,488				-104,488		-104,488
Distributions to noncontrolling interests						-124,853	-124,853
Partner contributions in noncontrolling interests						1,697	1,697
Acquisition and other noncontrolling interest transactions	-975		-975			6,650	5,675
Stock-based plan activity	93,847	15	93,832				93,847
Stock-based plan activity (in shares)		1,518,000
Repurchase of common stock	-200,052	-26	-79,946		-120,080		-200,052
Repurchase of common stock (in shares)		-2,592,000					-2,591,557
Debt conversions (in shares)		2,000
BALANCE at Dec. 31, 2013	3,756,987	1,613	12,911	-298,201	4,040,664	123,836	3,880,823
BALANCE (in shares) at Dec. 31, 2013		161,288,000
Increase (Decrease) in Shareholders' Equity
Net earnings	510,909				510,909	136,634	647,543
Other comprehensive loss	-186,011			-186,011		-7,309	-193,320
Dividends ($0.84, $0.64 and $0.64 per share for the years ended December 31, 2014, 2013 and 2012, respectively)	-132,608				-132,608		-132,608
Distributions to noncontrolling interests						-138,041	-138,041
Partner contributions in noncontrolling interests						3,336	3,336
Acquisition and other noncontrolling interest transactions	751		751			-5,497	-4,746
Stock-based plan activity	66,925	6	66,919				66,925
Stock-based plan activity (in shares)		675,000
Repurchase of common stock	-906,083	-133	-80,581		-825,369		-906,083
Repurchase of common stock (in shares)		-13,331,000					-13,331,402
Debt conversions	1				1		1
Debt conversions (in shares)		2,000
BALANCE at Dec. 31, 2014	$3,110,871	$1,486		($484,212)	$3,593,597	$112,959	$3,223,830
BALANCE (in shares) at Dec. 31, 2014		148,634,000

CONSOLIDATED_STATEMENT_OF_CHAN1

CONSOLIDATED STATEMENT OF CHANGES IN EQUITY (Parenthetical) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
CONSOLIDATED STATEMENT OF CHANGES IN EQUITY
Dividends (in dollars per share)	$0.84	$0.64	$0.64

Major_Accounting_Policies

Major Accounting Policies	12 Months Ended
	Dec. 31, 2014
Major Accounting Policies
Major Accounting Policies
	1.     Major Accounting Policies
	Principles of Consolidation
	The financial statements include the accounts of Fluor Corporation and its subsidiaries ("the company"). The company frequently forms joint ventures or partnerships with unrelated third parties for the execution of single contracts or projects. The company assesses its joint ventures and partnerships at inception to determine if any meet the qualifications of a variable interest entity ("VIE") in accordance with Accounting Standards Codification ("ASC") 810, "Consolidation." If a joint venture or partnership is a VIE and the company is the primary beneficiary, the joint venture or partnership is fully consolidated (see "15. Variable Interest Entities" below). For partnerships and joint ventures in the construction industry, unless full consolidation is required, the company generally recognizes its proportionate share of revenue, cost and profit in its Consolidated Statement of Earnings and uses the one-line equity method of accounting in the 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. At times, the company also executes projects through collaborative arrangements for which the company recognizes its relative share of revenue and cost.
	All significant intercompany transactions of consolidated subsidiaries are eliminated. Certain amounts in 2013 and 2012 have been reclassified to conform to the 2014 presentation. Management has evaluated all material events occurring subsequent to the date of the financial statements up to the filing date of this annual report on Form 10-K.
	Use of Estimates
	The preparation of financial statements in accordance with accounting principles generally accepted in the United States requires management to make estimates and assumptions that affect reported amounts. These estimates are based on information available through the date of the issuance of the financial statements. Therefore, actual results could differ from those estimates.
	Cash and Cash Equivalents
	Cash and cash equivalents include securities with maturities of three months or less at the date of purchase. Securities with maturities beyond three months are classified as marketable securities within current and noncurrent assets.
	Marketable Securities
	Marketable securities consist of time deposits placed with investment grade banks with original maturities greater than three months, which by their nature are typically held to maturity, and are classified as such because the company has the intent and ability to hold them to maturity. Held-to-maturity securities are carried at amortized cost. The company also has investments in debt securities which are classified as available-for-sale because the investments may be sold prior to their maturity date. Available-for-sale securities are carried at fair value. The cost of securities sold is determined by using the specific identification method. Marketable securities are assessed for other-than-temporary impairment.
	Engineering and Construction Contracts
	The company recognizes engineering and construction contract revenue using the percentage-of-completion method, based primarily on contract cost incurred to date compared to total estimated contract cost. Cost of revenue includes an allocation of depreciation and amortization. Customer-furnished materials, labor and equipment and, in certain cases, subcontractor materials, labor and equipment, are included in revenue and cost of revenue when management believes that the company is responsible for the ultimate acceptability of the project. Contracts are generally segmented between types of services, such as engineering and construction, and accordingly, gross margin related to each activity is recognized as those separate services are rendered. Changes to total estimated contract cost or losses, if any, are recognized in the period in which they are determined. Pre-contract costs are expensed as incurred. Revenue recognized in excess of amounts billed is classified as a current asset under contract work in progress. Advances that are payments on account of contract work in progress of $471 million and $544 million as of December 31, 2014 and 2013, respectively, have been deducted from contract work in progress. Amounts billed to clients in excess of revenue recognized to date are classified as a current liability under advance billings on contracts. The company anticipates that substantially all incurred cost associated with contract work in progress as of December 31, 2014 will be billed and collected in 2015. The company recognizes revenue, but not profit, for certain significant 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 cost is probable and the amounts can be reliably estimated. Under ASC 605-35-25, these requirements are satisfied when the contract or other evidence provides a legal basis for the claim, additional costs were caused by circumstances that were unforeseen at the contract date and not the result of deficiencies in the company's performance, claim-related costs are identifiable and considered reasonable in view of the work performed, and evidence supporting the claim is objective and verifiable. Cost, but not profit, associated with unapproved change orders is accounted for in revenue when it is probable that the cost will be recovered through a change in the contract price. In circumstances where recovery is considered probable but the revenue cannot be reliably estimated, cost attributable to change orders is deferred pending determination of the impact on contract price. If the requirements for recognizing revenue for claims or unapproved change orders are met, revenue is recorded only to the extent that costs associated with the claims or unapproved change orders have been incurred. The company generally provides limited warranties for work performed under its engineering and construction contracts. The warranty periods typically extend for a limited duration following substantial completion of the company's work on a project. Historically, warranty claims have not resulted in material costs incurred, and any estimated costs for warranties are included in the individual project cost estimates for purposes of accounting for long-term contracts.
	Property, Plant and Equipment
	Property, plant and equipment are recorded at cost. Leasehold improvements are amortized over the shorter of their economic lives or the lease terms. Depreciation is calculated using the straight-line method over the following ranges of estimated useful service lives, in years:
		December 31,						Estimated
								Useful
								Service
	(cost in thousands)		2014			2013		Lives
	Buildings			281,852			282,842
			$			$				20 – 40
	Building and leasehold improvements			172,789			175,740			6 – 20
	Machinery and equipment			1,305,623			1,328,434			2 – 10
	Furniture and fixtures			142,961			146,498			2 – 10
	Goodwill and Intangible Assets
	Goodwill is not amortized but is subject to annual impairment tests. Interim testing for impairment is performed if indicators of potential impairment exist. For purposes of impairment testing, goodwill is allocated to the applicable reporting units based on the current reporting structure. When testing goodwill for impairment quantitatively, the company first compares the fair value of each reporting unit with its carrying amount. If the carrying amount of a reporting unit exceeds its fair value, a second step is performed to measure the amount of potential impairment. In the second step, the company compares the implied fair value of reporting unit goodwill with the carrying amount of the reporting unit's goodwill. If the carrying amount of reporting unit goodwill exceeds the implied fair value of that goodwill, an impairment loss is recognized. During 2014, the company completed its annual goodwill impairment test in the first quarter and quantitatively determined that none of the goodwill was impaired. Goodwill for each of the company's segments is shown in "16. Operations by Business Segment and Geographical Area."
	The company had intangible assets with a carrying value of $23 million and $24 million as of December 31, 2014 and 2013, respectively. Intangible assets with indefinite lives are not amortized but are subject to annual impairment tests. Interim testing for impairment is also performed if indicators of potential impairment exist. An intangible asset with an indefinite life is impaired if its carrying value exceeds its fair value. As of December 31, 2014, none of the company's intangible assets with indefinite lives were impaired. Intangible assets with finite lives are amortized on a straight-line basis over the useful lives of those assets, ranging from one year to ten years.
	Income Taxes
	Deferred tax assets and liabilities are recognized for the expected future tax consequences of events that have been recognized in the company's financial statements or tax returns. The company evaluates the realizability of its deferred tax assets and maintains a valuation allowance, if necessary, to reduce certain deferred tax assets to amounts that are more likely than not to be realized. The factors used to assess the likelihood of realization are the company's forecast of future taxable income and available tax planning strategies that could be implemented to realize the net deferred tax assets. Failure to achieve forecasted taxable income in the applicable taxing jurisdictions could affect the ultimate realization of deferred tax assets and could result in an increase in the company's effective tax rate on future earnings.
	Income tax positions must meet a more-likely-than-not recognition threshold to be recognized. Income tax positions that previously failed to meet the more-likely-than-not threshold are recognized in the first subsequent financial reporting period in which that threshold is met. Previously recognized tax positions that no longer meet the more-likely-than-not threshold are derecognized in the first subsequent financial reporting period in which that threshold is no longer met. The company recognizes potential interest and penalties related to unrecognized tax benefits within its global operations in income tax expense.
	Judgment is required in determining the consolidated provision for income taxes as the company considers its worldwide taxable earnings and the impact of the continuing audit process conducted by various tax authorities. The final outcome of these audits by foreign jurisdictions, the Internal Revenue Service and various state governments could differ materially from that which is reflected in the Consolidated Financial Statements.
	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 accumulated other comprehensive income (loss) ("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.
	Under ASC 815, in certain limited circumstances, foreign currency payment provisions could be deemed embedded derivatives. As of December 31, 2014, 2013 and 2012, the company had no significant embedded derivatives in any of its contracts.
	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.
	Concentrations of Credit Risk
	Accounts receivable and all contract work in progress are from clients in various industries and locations throughout the world. Most contracts require payments as the projects progress or, in certain cases, advance payments. The company generally does not require collateral, but in most cases can place liens against the property, plant or equipment constructed or terminate the contract, if a material default occurs. The company evaluates the counterparty credit risk of third parties as part of its project risk review process and in determining the appropriate level of reserves. The company maintains adequate reserves for potential credit losses and generally such losses have been minimal and within management's estimates.
	Cash and marketable securities are deposited with major banks throughout the world. Such deposits are placed with high quality institutions and the amounts invested in any single institution are limited to the extent possible in order to minimize concentration of counterparty credit risk.
	The company's counterparties for derivative contracts are large financial institutions selected based on profitability, strength of balance sheet, credit ratings and capacity for timely payment of financial commitments. There are no significant concentrations of credit risk with any individual counterparty related to our derivative contracts.
	The company monitors the credit quality of its counterparties and has not incurred any significant credit risk losses related to its deposits or derivative contracts.
	Stock-Based Plans
	The company applies the provisions of ASC 718, "Compensation — Stock Compensation," in its accounting and reporting for stock-based compensation. ASC 718 requires all stock-based payments to employees, including grants of employee stock options, to be recognized in the income statement based on their fair values. All unvested options outstanding under the company's option plans have grant prices equal to the market price of the company's stock on the dates of grant. Compensation cost for restricted stock and restricted stock units is determined based on the fair market value of the company's stock at the date of grant. Compensation cost for stock appreciation rights is determined based on the change in the fair market value of the company's stock during the period. Stock-based compensation expense is generally recognized over the required service period, or over a shorter period when employee retirement eligibility is a factor. Certain awards that may be settled in cash or company stock are classified as liabilities and remeasured at fair value at the end of each reporting period until the awards are settled.
	Other Comprehensive Income (Loss)
	ASC 220, "Comprehensive Income," establishes standards for reporting and displaying comprehensive income and its components in the consolidated financial statements. The company reports the cumulative foreign currency translation adjustments, unrealized gains and losses on available-for-sale securities and derivative contracts, ownership share of equity method investees' other comprehensive income (loss), and adjustments related to defined benefit pension and postretirement plans, as components of accumulated other comprehensive income (loss).
	The tax effects of the components of other comprehensive income (loss) are as follows:
			Year Ended December 31,
			2014									2013									2012
	(in thousands)		Before-Tax			Tax			Net-of-Tax			Before-Tax			Tax			Net-of-Tax			Before-Tax			Tax			Net-of-Tax
			Amount			(Expense)			Amount			Amount			(Expense)			Amount			Amount			(Expense)			Amount
						Benefit									Benefit									Benefit
	Other comprehensive income (loss):
	Foreign currency translation adjustment		$	(197,361	)	$	71,552		$	(125,809	)	$	(74,538	)	$	27,637		$	(46,901	)	$	47,780		$	(18,077	)	$	29,703
	Ownership share of equity method investees' other comprehensive income			5,892			(4,054	)		1,838			13,117			(2,372	)		10,745			1,487			(924	)		563
	Defined benefit pension and postretirement plan adjustments			(106,957	)		40,109			(66,848	)		(8,917	)		3,344			(5,573	)		(145,848	)		54,693			(91,155	)
	Unrealized gain (loss) on derivative contracts			(2,837	)		773			(2,064	)		2,171			(787	)		1,384			2,369			(1,071	)		1,298
	Unrealized gain (loss) on available-for-sale securities			(700	)		263			(437	)		(1,244	)		466			(778	)		135			(50	)		85
	Total other comprehensive loss			(301,963	)		108,643			(193,320	)		(69,411	)		28,288			(41,123	)		(94,077	)		34,571			(59,506	)
	Less: Other comprehensive loss attributable to noncontrolling interests			(7,309	)		—			(7,309	)		(772	)		—			(772	)		(948	)		—			(948	)
	Other comprehensive loss attributable to Fluor Corporation		$	(294,654	)	$	108,643		$	(186,011	)	$	(68,639	)	$	28,288		$	(40,351	)	$	(93,129	)	$	34,571		$	(58,558	)
	In the first quarter of 2013, the company adopted Accounting Standards Update ("ASU") 2013-02, "Reporting of Amounts Reclassified Out of Accumulated Other Comprehensive Income," which requires an entity to disclose additional information about reclassification adjustments, including (a) changes in AOCI balances by component and (b) significant items reclassified out of AOCI.
	The changes in AOCI balances by component (after-tax) for the year ended December 31, 2014 are as follows:
	(in thousands)		Foreign			Ownership			Defined			Unrealized			Unrealized			Accumulated
			Currency			Share of			Benefit			Gain (Loss)			Gain (Loss)			Other
			Translation			Equity Method			Pension and			on Derivative			on Available-			Comprehensive
			Investees' Other			Postretirement			Contracts			for-Sale			Income
			Comprehensive			Plans						Securities			(Loss), Net
			Income (Loss)
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			(119,252	)		(7,958	)		(74,924	)		(2,151	)		(349	)		(204,634	)
Amount reclassified from AOCI			—			9,796			8,076			839			(88	)		18,623
Net other comprehensive income (loss)			(119,252	)		1,838			(66,848	)		(1,312	)		(437	)		(186,011	)
Balance as of December 31, 2014		$	(119,416	)	$	(30,436	)	$	(325,145	)	$	(8,954	)	$	(261	)	$	(484,212	)
Attributable to Noncontrolling Interests:
Balance as of December 31, 2013		$	7,885		$	—		$	—		$	67		$	—		$	7,952
Other comprehensive loss before reclassifications			(6,557	)		—			—			(795	)		—			(7,352	)
Amount reclassified from AOCI			—			—			—			43						43
Net other comprehensive loss			(6,557	)		—			—			(752	)		—			(7,309	)
Balance as of December 31, 2014		$	1,328		$	—		$	—		$	(685	)	$	—		$	643
The changes in AOCI balances by component (after-tax) for the year ended December 31, 2013 are as follows:
(in thousands)		Foreign			Ownership			Defined			Unrealized			Unrealized			Accumulated
		Currency			Share of			Benefit			Gain (Loss)			Gain (Loss)			Other
		Translation			Equity Method			Pension and			on Derivative			on Available-			Comprehensive
					Investees' Other			Postretirement			Contracts			for-Sale			Income
					Comprehensive			Plans						Securities			(Loss), Net
					Income (Loss)
Attributable to Fluor Corporation:
Balance as of December 31, 2012		$	45,899		$	(43,019	)	$	(252,724	)	$	(8,960	)	$	954		$	(257,850	)
Other comprehensive income (loss) before reclassifications			(46,063	)		10,745			(13,655	)		(2,536	)		(652	)		(52,161	)
Amount reclassified from AOCI			—			—			8,082			3,854			(126	)		11,810
Net other comprehensive income (loss)			(46,063	)		10,745			(5,573	)		1,318			(778	)		(40,351	)
Balance as of December 31, 2013		$	(164	)	$	(32,274	)	$	(258,297	)	$	(7,642	)	$	176		$	(298,201	)
Attributable to Noncontrolling Interests:
Balance as of December 31, 2012		$	8,723		$	—		$	—		$	1		$	—		$	8,724
Other comprehensive income (loss) before reclassifications			(838	)		—			—			62			—			(776	)
Amount reclassified from AOCI			—			—			—			4						4
Net other comprehensive income (loss)			(838	)		—			—			66			—			(772	)
Balance as of December 31, 2013		$	7,885		$	—		$	—		$	67		$	—		$	7,952
The changes in AOCI balances by component (after-tax) attributable to Fluor Corporation for the year ended December 31, 2012 are as follows:
(in thousands)		Foreign			Ownership			Defined			Unrealized			Unrealized			Accumulated
		Currency			Share of Equity			Benefit			Gain (Loss)			Gain on			Other
		Translation			Method			Pension and			on Derivative			Available-			Comprehensive
					Investees' Other			Postretirement			Contracts			for-Sale			Loss, Net
					Comprehensive			Plans						Securities
					Income (Loss)
Balance as of December 31, 2011			15,770			(43,582			(161,569			(10,780			869			(199,292
		$			$		)	$		)	$		)	$			$		)
Current-period other comprehensive income (loss)			30,129			563			(91,155	)		1,820			85			(58,558	)
Balance as of December 31, 2012		$	45,899		$	(43,019	)	$	(252,724	)	$	(8,960	)	$	954		$	(257,850	)
During 2014 and 2013, functional currency exchange rates for most of the company's international operations weakened against the U.S. dollar, resulting in unrealized translation losses. During 2012, functional currency exchange rates for most of the company's international operations strengthened against the U.S. dollar, resulting in unrealized translation gains.
The significant items reclassified out of AOCI and the corresponding location and impact on the Consolidated Statement of Earnings are as follows:
				Year Ended
		Location in Consolidated		December 31,
(in thousands)		Statements of Earnings		2014			2013
Component of AOCI:
Ownership share of equity method investees' other comprehensive loss		Total cost of revenue		$	(15,662	)	$	—
Income tax benefit		Income tax expense			5,866			—
Net of tax				$	(9,796	)	$	—
Defined benefit pension plan adjustments		Various accounts(1)			(12,922			(12,931
				$		)	$		)
Income tax benefit		Income tax expense			4,846			4,849
Net of tax				$	(8,076	)	$	(8,082	)
Unrealized gain (loss) on derivative contracts:
Commodity and foreign currency contracts		Total cost of revenue		$	255		$	(4,502	)
Interest rate contracts		Interest expense			(1,678	)		(1,678	)
Income tax benefit (net)		Income tax expense			541			2,322
Net of tax:					(882	)		(3,858	)
Less: Noncontrolling interests		Net earnings attributable to noncontrolling interests			(43	)		(4	)
Net of tax and noncontrolling interests				$	(839	)	$	(3,854	)
Unrealized gain on available-for-sale securities		Corporate general and administrative expense		$	140		$	202
Income tax expense		Income tax expense			(52	)		(76	)
Net of tax				$	88		$	126
-1	Defined benefit pension plan adjustments were reclassified primarily to total cost of revenue and corporate general and administrative expense.
Recent Accounting Pronouncements
In January 2015, the Financial Accounting Standards Board ("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 June 2014, the FASB issued 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. This ASU is effective for interim and annual reporting periods beginning after December 15, 2014. Management does not expect the adoption of ASU 2014-11 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 revenue 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 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.
In April 2014, the FASB issued 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. This ASU is effective prospectively for all disposals or classifications as held for sale that occur in interim and annual reporting periods beginning after December 15, 2014. Management does not expect the adoption of ASU 2014-08 to have a material impact on the company's financial position, results of operations or cash flows.
In January 2014, the FASB issued 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. This ASU is effective for interim and annual reporting periods beginning after December 15, 2014. Management does not expect the adoption of ASU 2014-05 to have a material impact on the company's financial position, results of operations or cash flows.
In the first quarter of 2014, the company adopted ASU 2013-11, "Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists." This ASU clarifies the financial statement presentation of unrecognized tax benefits in certain circumstances. The adoption of ASU 2013-11 did not have an impact on the company's financial position, results of operations or cash flows.
In the first quarter of 2014, the company adopted ASU 2013-07, "Liquidation Basis of Accounting," which clarifies when an entity should apply the liquidation basis of accounting. In addition, ASU 2013-07 provides principles for the recognition and measurement of assets and liabilities and requirements for financial statements prepared using the liquidation basis of accounting. The adoption of ASU 2013-07 did not have an impact on the company's financial position, results of operations or cash flows.
In the first quarter of 2014, the company adopted ASU 2013-05, "Parent's Accounting for the Cumulative Translation Adjustment upon Derecognition of Certain Subsidiaries or Groups of Assets within a Foreign Entity or of an Investment in a Foreign Entity." The objective of ASU 2013-05 is to resolve a practice diversity in circumstances where reporting entities release cumulative translation adjustments into net income when a parent either sells a part or all of its investment in a foreign entity, or no longer holds a controlling financial interest in a subsidiary or group of assets that is a nonprofit activity or a business (other than a sale of in substance real estate or conveyance of oil and gas mineral rights) within a foreign entity. The adoption of ASU 2013-05 did not have an impact on the company's financial position, results of operations or cash flows.
In the first quarter of 2014, the company adopted ASU 2013-04, "Obligations Resulting from Joint and Several Liability Arrangements for Which the Total Amount of the Obligation Is Fixed at the Reporting Date," which addresses the recognition, measurement and disclosure of certain obligations including debt arrangements, other contractual obligations and settled litigation and judicial rulings. The adoption of ASU 2013-04 did not have an impact on the company's financial position, results of operations or cash flows.

Discontinued_Operations

Discontinued Operations	12 Months Ended
	Dec. 31, 2014
Discontinued Operations
Discontinued Operations
	2.     Discontinued Operations
	During 2014, the company recorded an after-tax loss from discontinued operations of $205 million in connection with the reassessment of estimated loss contingencies related to the previously divested lead business of St. Joe Minerals Corporation and The Doe Run Company in Herculaneum, Missouri. The tax effect associated with this loss was $112 million. See "14. Contingencies and Commitments" for further discussion of this matter.

Recovered_Sheet1

Consolidated Statement of Cash Flows	12 Months Ended
	Dec. 31, 2014
Consolidated Statement of Cash Flows.
Consolidated Statement of Cash Flows
	3.     Consolidated Statement of Cash Flows
	The changes in operating assets and liabilities as shown in the Consolidated Statement of Cash Flows are comprised of:
		Year Ended December 31,
	(in thousands)	2014			2013			2012
	(Increase) decrease in:
	Accounts and notes receivable, net	$	(336,109	)	$	(98,744	)	$	23,680
	Contract work in progress		50,570			101,158			29,669
	Other current assets		28,482			102,417			(111,311	)
	Other assets		44,580			(26,204	)		(65,418	)
	Increase (decrease) in:
	Trade accounts payable		(153,515	)		(274,418	)		195,147
	Advance billings on contracts		(63,594	)		(29,043	)		(237,497	)
	Accrued liabilities		31,697			(83,613	)		28,993
	Other liabilities		(10,972	)		46,851			(58,773	)
	Decrease in cash due to changes in operating assets and liabilities	$	(408,861	)	$	(261,596	)	$	(195,510	)
	Cash paid during the year for:
	Interest	$	23,509		$	22,585		$	24,244
	Income taxes (net of refunds)		228,471			268,889			294,214

Income_Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2014
Income Taxes
Income Taxes
	4.     Income Taxes
	The income tax expense (benefit) included in the Consolidated Statement of Earnings from continuing operations is as follows:
		Year Ended December 31,
	(in thousands)	2014			2013			2012
	Current:
	Federal	$	126,490		$	200,608		$	(133,312	)
	Foreign		151,240			168,894			226,110
	State and local		13,001			14,779			(7,804	)
	Total current		290,731			384,281			84,994
	Deferred:
	Federal		74,037			(29,873	)		87,723
	Foreign		(10,353	)		2,054			(16,645	)
	State and local		(1,600	)		(1,889	)		6,366
	Total deferred		62,084			(29,708	)		77,444
	Total income tax expense	$	352,815		$	354,573		$	162,438
	A reconciliation of U.S. statutory federal income tax expense to income tax expense is as follows:
		Year Ended December 31,
	(in thousands)	2014			2013			2012
	U.S. statutory federal tax expense		421,718			412,159			256,727
		$			$			$
	Increase (decrease) in taxes resulting from:
	State and local income taxes		7,670			7,802			1,727
	Other permanent items, net		(9,378	)		(17,517	)		(4,849	)
	Noncontrolling interests		(47,822	)		(54,359	)		(39,600	)
	Foreign losses, net		27,660			(18,568	)		(84,366	)
	Valuation allowance, net		(36,523	)		15,305			85,541
	Statute expirations and tax authority settlements		(19,331	)		—			(13,152	)
	Other changes to unrecognized tax positions		5,574			9,261			(29,740	)
	Other, net		3,247			490			(9,850	)
	Total income tax expense	$	352,815		$	354,573		$	162,438
	Deferred taxes reflect the tax effects of differences between the amounts recorded as assets and liabilities for financial reporting purposes and the amounts recorded for income tax purposes. The tax effects of significant temporary differences giving rise to deferred tax assets and liabilities are as follows:
		December 31,
	(in thousands)	2014			2013
	Deferred tax assets:
	Accrued liabilities not currently deductible:
	Employee compensation and benefits	$	53,672		$	54,723
	Employee time-off accrual		92,901			94,213
	Project and non-project reserves		27,520			24,753
	Accrual for discontinued operations		110,714			—
	Workers' compensation insurance accruals		13,122			14,400
	Tax basis of investments in excess of book basis		4,264			4,957
	Revenue recognition		36,890			36,180
	Net operating loss carryforward		236,138			266,664
	Unrealized currency loss		4,161			6,817
	Foreign tax credits		—			30,705
	Other comprehensive loss		288,494			179,228
	Other		39,552			21,274
	Total deferred tax assets		907,428			733,914
	Valuation allowance for deferred tax assets		(208,905	)		(245,428	)
	Deferred tax assets, net	$	698,523		$	488,486
	Deferred tax liabilities:
	Book basis of property, equipment and other capital costs in excess of tax basis		(53,750	)		(36,169	)
	Residual U.S. tax on unremitted non-U.S. earnings		(85,669	)		(50,569	)
	Other		(17,877	)		(16,179	)
	Total deferred tax liabilities		(157,296	)		(102,917	)
	Deferred tax assets, net of deferred tax liabilities	$	541,227		$	385,569
	The company had non-U.S. net operating loss carryforwards, related to various jurisdictions, of approximately $1.0 billion as of December 31, 2014. Of the total losses, $977 million can be carried forward indefinitely and $48 million will begin to expire in various jurisdictions starting in 2015.
	The company maintains a valuation allowance to reduce certain deferred tax assets to amounts that are more likely than not to be realized. The valuation allowance for 2014 and 2013 is primarily due to the deferred tax assets established for certain net operating loss carryforwards and certain reserves on investments. The net decrease in the valuation allowance during 2014 was primarily due to realization of deferred tax assets as a result of utilization of net operating losses carryforwards in the current year.
	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 a 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.
	During 2014, the company concluded an audit with the U.S. Internal Revenue Service ("IRS") for tax years 2006 through 2008. This resulted in a net reduction in tax expense of $19 million. During 2012, the company reached an agreement on certain issues with the IRS on a tax audit for tax years 2003 through 2005, which resulted in a net reduction in tax expense of $13 million.
	The unrecognized tax benefits as of December 31, 2014 and 2013 were $34 million and $54 million, of which $25 million and $40 million, if recognized, would have favorably impacted the effective tax rates at the end of 2014 and 2013, respectively. The company does not anticipate any significant changes to the unrecognized tax benefits within the next twelve months.
	A reconciliation of the beginning and ending amount of unrecognized tax benefits including interest and penalties is as follows:
	(in thousands)	2014			2013
Balance at beginning of year	$	54,054		$	47,043
Change in tax positions of prior years		6,727			1,015
Change in tax positions of current year		3,600			7,397
Reduction in tax positions for statute expirations		(2,275	)		(1,401	)
Reduction in tax positions for audit settlements		(28,134	)		—
Balance at end of year	$	33,972		$	54,054
The company recognizes accrued interest and penalties related to unrecognized tax benefits in income tax expense. The company has $7 million in interest and penalties accrued as of both December 31, 2014 and 2013.
U.S. and foreign earnings from continuing operations before taxes are as follows:
	Year Ended December 31,
(in thousands)	2014			2013			2012
United States	$	332,497		$	303,070		$	279,890
Foreign		872,412			874,529			453,615
Total	$	1,204,909		$	1,177,599		$	733,505
Earnings from continuing operations before taxes in the United States increased in 2014 compared to 2013 primarily due to higher contributions from the Oil & Gas segment. Earnings from continuing operations before taxes in foreign jurisdictions decreased modestly in 2014 compared to 2013 primarily due to lower contributions from the mining and metals business line of the Industrial & Infrastructure segment. Earnings from continuing operations before taxes in the United States increased in 2013 compared to 2012 principally due to improved performance in the Oil & Gas segment. Earnings from continuing operations before taxes in foreign jurisdictions increased in 2013 compared to 2012 because the prior year results included a pre-tax charge of an unexpected adverse decision in the arbitration proceedings related to the company's claim for additional compensation for the now completed Greater Gabbard Project.

Retirement_Benefits

Retirement Benefits	12 Months Ended
	Dec. 31, 2014
Retirement Benefits
Retirement Benefits
	5.     Retirement Benefits
	The company sponsors contributory and non-contributory defined contribution retirement and defined benefit pension plans for eligible employees worldwide. Domestic and international defined contribution retirement plans are available to eligible salaried and craft employees. Contributions to defined contribution retirement plans are based on a percentage of the employee's eligible compensation. The company recognized expense of $150 million, $151 million and $144 million associated with contributions to its defined contribution retirement plans during 2014, 2013 and 2012, respectively. Certain defined benefit pension plans are available to eligible international salaried employees. A defined benefit pension plan was previously available to U.S. salaried and craft employees; however, the U.S. defined benefit pension plan (the "U.S. plan") was terminated on December 31, 2014 (see further discussion below). Contributions to defined benefit pension plans are at least the minimum amounts required by applicable regulations. Benefit payments under these plans are generally based upon length of service and/or a percentage of qualifying compensation.
	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 both 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 $274 million as of December 31, 2014, 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.
	The company's defined benefit pension plan in the Netherlands was closed to new participants on December 31, 2013. This change did not have a material impact on the pension obligation or the accumulated other comprehensive income balance of the plan. The company previously approved an amendment to freeze the accrual of future service-related benefits for eligible participants of the U.K. pension plan as of April 1, 2011.
	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
			Year Ended December 31,									Year Ended December 31,
	(in thousands)		2014			2013			2012			2014			2013			2012
	Service cost		$	3,800		$	6,453		$	5,957		$	16,217		$	15,390		$	7,723
	Interest cost			31,675			29,100			33,293			34,536			32,176			32,630
	Expected return on assets			(30,105	)		(30,975	)		(35,322	)		(48,077	)		(46,420	)		(41,949	)
	Amortization of prior service cost/(credits)			750			103			(114	)		—			—			—
	Recognized net actuarial loss			4,435			6,039			4,279			7,738			6,788			1,663
	(Gain on curtailment)/loss on settlement			—			(309	)		—			—			—			—
	Net periodic pension expense		$	10,555		$	10,411		$	8,093		$	10,414		$	7,934		$	67
	The ranges of assumptions indicated below cover defined benefit pension plans in the United States, the Netherlands, the United Kingdom, Australia and the Philippines and are based on the economic environment in each host country at the end of each respective annual reporting period. The discount rate for the U.S. plan was determined based on assumptions which reflect the intended settlement of the plan in 2015. Benefits that are assumed to be settled as lump-sum payments to plan participants were estimated using interest rates prescribed by law. Benefits that are assumed to be settled through an annuity purchase were estimated using a blend of U.S. Treasury and high-quality corporate bond discount rates. The discount rates for the non-U.S. defined benefit pension plans were determined primarily based on a hypothetical yield curve developed from the yields on high quality corporate and government bonds with durations consistent with the pension obligations in those countries. The expected long-term rate of return on asset assumptions utilizing historical returns, correlations and investment manager forecasts are established for each major asset category including public U.S. and international equities, U.S. private equities and debt securities.
			U.S. Pension Plan									Non-U.S. Pension Plans
			December 31,									December 31,
			2014			2013			2012			2014			2013			2012
	For determining projected benefit obligation at year-end:
	Discount rates			1.95%			4.95%			4.05%			2.20-5.00%			3.55-5.50%			3.60-6.00%
	Rates of increase in compensation levels			N/A			N/A			N/A			2.25-8.00%			2.25-9.00%			2.25-9.00%
	For determining net periodic cost for the year:
	Discount rates			4.95%			4.05%			5.05%			3.55-5.50%			3.60-6.00%			3.75-6.75%
	Rates of increase in compensation levels			N/A			N/A			N/A			2.25-9.00%			2.25-9.00%			2.25-9.00%
	Expected long-term rates of return on assets			4.55%			4.25%			5.25%			4.75-7.00%			5.00-7.00%			5.00-7.00%
	The company evaluates the funded status of each of its retirement plans using the above assumptions and determines the appropriate funding level considering applicable regulatory requirements, tax deductibility, reporting considerations and other factors. The funding status of the plans is sensitive to changes in long-term interest rates and returns on plan assets, and funding obligations could increase substantially if interest rates fall dramatically or returns on plan assets are below expectations. Assuming no changes in current assumptions, the company expects to contribute up to $100 million in 2015, which is expected to be in excess of the minimum funding required and includes estimated additional funding to settle the U.S. plan. If the discount rates were reduced by 25 basis points, plan liabilities for the U.S. and non-U.S. plans would increase by approximately $17 million and $54 million, respectively.
	The following table sets forth the target allocations and the weighted average actual allocations of plan assets:
						U.S. Plan								Non-U.S. Plan
						Assets								Assets
						December 31,								December 31,
			Target Allocation			2014			2013		Target Allocation			2014			2013
	Asset category:
	Debt securities		95% - 100%			93%			94%		65% - 75%			71%			63%
	Equity securities		0% - 5%			2%			5%		20% - 30%			25%			32%
	Other		0% - 5%			5%			1%		0% - 10%			4%			5%
	Total					100%			100%					100%			100%
	The company's investment strategy is to maintain asset allocations that appropriately address risk within the context of seeking adequate returns. Investment allocations are determined by each plan's investment committee and/or trustees. In the case of certain non-U.S. plans, asset allocations may be affected by local regulations. Long-term allocation guidelines are set and expressed in terms of a target range allocation for each asset class to provide portfolio management flexibility. Short-term deviations from these allocations may exist from time to time for tactical investment or strategic implementation purposes.
	Investments in debt securities are used to provide stable investment returns while protecting the funding status of the plans. Investments in equity securities are utilized to generate long-term capital appreciation to mitigate the effects of increases in benefit obligations resulting from inflation, longer life expectancy and salary growth. While most of the company's plans are not prohibited from investing in the company's common stock or debt securities, there are no such direct investments at the present time.
	Plan assets included investments in common or collective trusts, which offer efficient access to diversified investments across various asset categories. The estimated fair value of the investments in the common or collective trusts represents the underlying net asset value of the shares or units of such funds as determined by the issuer. A redemption notice period of no more than 30 days is required for the plans to redeem certain investments in common or collective trusts. At the present time, there are no other restrictions on how the plans may redeem their investments.
	Debt securities are comprised of corporate bonds, government securities and common or collective trusts, with underlying investments in corporate bonds, government and asset backed securities and interest rate swaps. Corporate bonds primarily consist of investment-grade rated bonds and notes, of which no significant concentration exists in any one rating category or industry. Government securities include U.S. and international government bonds, some of which are inflation-indexed. Corporate bonds and government securities 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. As of December 31, 2013, the investments in corporate bonds and government securities held by the U.S. plan were primarily concentrated in U.S. issuers. As of December 31, 2014, debt securities held by the U.S. plan consisted entirely of common or collective trusts, with underlying investments in corporate bonds and government securities.
	Equity securities are diversified across various industries and are comprised of common and preferred stocks of U.S. and international companies, common or collective trusts with underlying investments in common and preferred stocks and limited partnerships. Publicly traded corporate equity securities are valued based on the last trade or official close of an active market or exchange on the last business day of the plan's year. Securities not traded on the last business day are valued at the last reported bid price. As of December 31, 2014 and 2013, direct investments in equity securities, excluding common or collective trusts, were concentrated primarily in international securities held by the company's non-U.S. pension plans. Limited partnerships are valued at the plan's proportionate share of the estimated fair value of the underlying net assets as determined by the general partners. The limited partnerships are classified as Level 3 investments, as defined below.
	Other is primarily comprised of common or collective trusts, short-term investment funds, foreign currency contracts and obligations to return collateral under securities lending arrangements. Common or collective trusts hold underlying investments in commodities, foreign currency contracts and real estate. Common or collective trusts with underlying investments in real estate are classified as Level 3 investments. The estimated fair value of foreign currency contracts is determined from broker quotes. The estimated fair value of obligations to return collateral under securities lending arrangements are determined based on the last traded price of the underlying securities held as collateral.
	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 plan assets and liabilities of the company's U.S. and non-U.S. defined benefit pension plans that are measured at fair value on a recurring basis as of December 31, 2014 and 2013:
	U.S. Pension Plan
			December 31, 2014												December 31, 2013
			Fair Value Hierarchy												Fair Value Hierarchy
	(in thousands)		Total			Level 1			Level 2			Level 3			Total			Level 1			Level 2			Level 3
	Assets:
	Equity securities:
	Common stock		$	19		$	19		$	—		$	—		$	—		$	—		$	—		$	—
	Common or collective trusts			—			—			—			—			17,068			—			17,068			—
	Limited Partnerships			12,393			—			—			12,393			17,546			—			—			17,546
	Debt securities:
	Common or collective trusts			698,193			—			698,193			—			202,575			—			202,575			—
	Corporate bonds			—			—			—			—			397,524			—			397,524			—
	Government securities			—			—			—			—			69,562			—			69,562			—
	Other:
Common or collective trusts — money market funds			40,640			—			40,640			—			3,644			—			3,644			—
Other assets			—			—			—			—			4,374			—			4,374			—
Liabilities:
Foreign currency contracts and other			—			—			—			—			(4,338	)		—			(4,338	)		—
Plan assets measured at fair value, net		$	751,245		$	19		$	738,833		$	12,393		$	707,955		$	—		$	690,409		$	17,546
Plan assets not measured at fair value, net			23												775
Total plan assets, net		$	751,268											$	708,730
Non-U.S. Pension Plans
		December 31, 2014												December 31, 2013
		Fair Value Hierarchy												Fair Value Hierarchy
(in thousands)		Total			Level 1			Level 2			Level 3			Total			Level 1			Level 2			Level 3
Assets:
Equity securities:
Common and preferred stock		$	54,890		$	54,890		$	—		$	—		$	71,567		$	71,567		$	—		$	—
Common or collective trusts			200,701			—			200,701			—			228,608			—			228,608			—
Debt securities:
Common or collective trusts			378,569			—			378,569			—			321,086			—			321,086			—
Corporate bonds			149,152			—			149,152			—			107,658			—			107,658			—
Government securities			195,305			—			195,305			—			160,586			—			160,586			—
Other:
Common or collective trusts			37,092			—			30,441			6,651			48,409			—			40,667			7,742
Other assets			13,006			—			13,006			—			2,634			—			2,634			—
Liabilities:
Foreign currency contracts and other			(11,038	)		—			(11,038	)		—			(3,979	)		—			(3,979	)		—
Plan assets measured at fair value, net		$	1,017,677		$	54,890		$	956,136		$	6,651		$	936,569		$	71,567		$	857,260		$	7,742
Plan assets not measured at fair value, net			14,456												9,268
Total plan assets, net			1,032,133												945,837
		$												$
The following table presents a reconciliation of the beginning and ending balances of the fair value measurements using significant unobservable inputs (Level 3):
		U.S. Pension Plan						Non-U.S.
								Pension Plans
(in thousands)		2014			2013			2014			2013
Balance at beginning of year		$	17,546		$	17,630		$	7,742		$	7,800
Actual return on plan assets:
Assets still held at reporting date			(2,454	)		418			(886	)		(58	)
Assets sold during the period			124			357			3			—
Purchases			—			—			—			—
Sales			(2,823	)		(859	)		(208	)		—
Settlements			—			—			—			—
Balance at end of year		$	12,393		$	17,546		$	6,651		$	7,742
The following table presents expected benefit payments for the U.S. and non-U.S. defined benefit pension plans:
(in thousands)		U.S.			Non-U.S.
		Pension Plan			Pension Plans
Year Ended December 31,
2015		$	820,586	-1	$	26,497
2016			—			27,250
2017			—			28,914
2018			—			29,443
2019			—			31,706
2020 — 2024			—			177,582
-1	The majority of the benefit payments for the U.S. plan are expected to occur at settlement and to be funded from plan assets, which totaled $751 million as of December 31, 2014.
Measurement dates for the company's U.S. and non-U.S. defined benefit pension plans are December 31. The following table sets forth the change in projected benefit obligation, plan assets and funded status of the U.S. and non-U.S. plans:
		U.S. Pension Plan						Non-U.S. Pension Plans
		December 31,						December 31,
(in thousands)		2014			2013			2014			2013
Change in projected benefit obligation
Benefit obligation at beginning of year		$	686,977		$	756,976		$	908,530		$	826,466
Service cost			3,800			6,453			16,217			15,390
Interest cost			31,675			29,100			34,536			32,176
Employee contributions			—			—			4,448			3,832
Currency translation			—			—			(110,188	)		25,885
Actuarial (gain) loss			146,643			(59,990	)		196,021			29,510
Plan amendments			2,236			6,367			(17,921	)		—
Benefits paid			(52,199	)		(48,204	)		(26,505	)		(24,729	)
Curtailments			—			—			—			—
Other			(3,764	)		(3,725	)		—			—
Projected benefit obligation at end of year			815,368			686,977			1,005,138			908,530
Change in plan assets
Plan assets at beginning of year			708,730			767,296			945,837			886,141
Actual return on plan assets			62,501			(6,637	)		191,929			40,508
Company contributions			36,000			—			26,816			13,133
Employee contributions			—			—			4,448			3,832
Currency translation			—			—			(110,392	)		26,952
Benefits paid			(52,199	)		(48,204	)		(26,505	)		(24,729	)
Other			(3,764	)		(3,725	)		—			—
Plan assets at end of year			751,268			708,730			1,032,133			945,837
(Under)/overfunded amounts		$	(64,100	)	$	21,753		$	26,995		$	37,307
Amounts recognized in the Consolidated Balance Sheet
Pension assets included in other assets		$	—		$	21,753		$	82,820		$	58,849
Pension liabilities included in noncurrent liabilities			(64,100	)		—			(55,825	)		(21,542	)
Accumulated other comprehensive loss (pre-tax)		$	273,832		$	162,534		$	250,399		$	252,995
During 2015, approximately $10 million for the U.S. plan and $7 million for the non-U.S. plans of the amount of accumulated other comprehensive loss shown above is expected to be recognized as components of net periodic pension expense, excluding any additional expenses that may be recognized in conjunction with the settlement of the U.S. plan.
For the defined benefit pension plans in the United States, the Netherlands and the Philippines, the projected benefit obligations exceeded the plan assets. In the aggregate, these plans had projected benefit obligations of $1.5 billion and plan assets with a fair value of $1.3 billion.
The total accumulated benefit obligation for the U.S. and non-U.S. plans as of December 31, 2014 was $815 million and $937 million, respectively. The total accumulated benefit obligation for the U.S. and non-U.S. plans as of December 31, 2013 was $687 million and $853 million, respectively. The accumulated benefit obligation exceeded plan assets for the U.S. plan as of December 31, 2014. Plan assets exceeded the accumulated benefit obligation for each of the company's non-U.S plans as of December 31, 2014 and 2013 and for the U.S. plan as of December 31, 2013.
In addition to the company's U.S. defined benefit pension plan, the company and certain of its subsidiaries provide health care and life insurance benefits for certain retired U.S. employees. The health care and life insurance plans are generally contributory, with retiree contributions adjusted annually. The accumulated postretirement benefit obligation as of December 31, 2014 and 2013 was determined in accordance with the current terms of the company's health care plans, together with relevant actuarial assumptions and health care cost trend rates projected at annual rates ranging from 7.5 percent in 2015 down to 5 percent in 2025 and beyond. The effect of a one percent annual increase in these assumed cost trend rates would increase the accumulated postretirement benefit obligation and interest cost by approximately $0.4 million and less than $0.1 million, respectively. The effect of a one percent annual decrease in these assumed cost trend rates would decrease the accumulated postretirement benefit obligation and interest cost by approximately $0.4 million and less than $0.1 million, respectively.
Net periodic postretirement benefit cost included the following components:
		Year Ended December 31,
(in thousands)		2014			2013			2012
Service cost		$	—		$	—		$	—
Interest cost			388			351			592
Expected return on assets			—			—			—
Amortization of prior service cost			—			—			—
Recognized net actuarial loss			151			341			640
Net periodic postretirement benefit cost		$	539		$	692		$	1,232
The following table sets forth the change in the accumulated postretirement benefit obligation:
		Year Ended
		December 31,
(in thousands)		2014			2013
Change in accumulated postretirement benefit obligation
Benefit obligation at beginning of year		$	12,629		$	14,512
Service cost			—			—
Interest cost			388			351
Employee contributions			356			421
Actuarial (gain) loss			(252	)		(596	)
Benefits paid			(1,811	)		(2,059	)
Benefit obligation at end of year		$	11,310		$	12,629
Funded status		$	(11,310	)	$	(12,629	)
Unrecognized net actuarial losses totaling $1 million and $2 million as of December 31, 2014 and 2013, respectively, were classified in accumulated other comprehensive loss. The accumulated postretirement benefit obligation classified in current liabilities was approximately $2 million and $3 million as of December 31, 2014 and 2013, respectively. The remaining balance of the accumulated postretirement benefit obligation was classified in noncurrent liabilities for both years.
The discount rate used in determining the accumulated postretirement benefit obligation was 3.25 percent as of December 31, 2014 and 3.40 percent as of December 31, 2013. The discount rate used for the accumulated postretirement obligation was determined by discounting the expected future benefit payments using yields based on a portfolio of high quality corporate bonds having maturities that are consistent with the expected timing of future payments to plan participants. Benefit payments, as offset by retiree contributions, are not expected to change significantly in the future.
The preceding information does not include amounts related to benefit plans applicable to employees associated with certain contracts with the U.S. Department of Energy ("DOE") because the company is not responsible for the current or future funded status of these plans.
In addition to the company's defined benefit pension plans discussed above, the company participates in multiemployer pension plans for its union construction and maintenance craft employees. Contributions are based on the hours worked by employees covered under various collective bargaining agreements. Company contributions to these multiemployer pension plans were $23 million, $19 million and $24 million during 2014, 2013 and 2012, respectively. The company does not have any significant future obligations or funding requirements related to these plans other than the ongoing contributions that are paid as hours are worked by plan participants. None of these multiemployer pension plans are individually significant to the company.

Fair_Value_of_Financial_Instru

Fair Value of Financial Instruments	12 Months Ended
	Dec. 31, 2014
Fair Value of Financial Instruments
Fair Value of Financial Instruments
	6.     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:
	•		—		quoted prices in active markets for identical assets and liabilities
	Level 1
	•		—		inputs other than quoted prices in active markets for identical assets and liabilities that are observable, either directly or indirectly
	Level 2
	•		—		unobservable inputs
	Level 3
	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 December 31, 2014 and 2013:
			December 31, 2014												December 31, 2013
			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)		$	14,419		$	14,419		$	—		$	—		$	50,081	$	50,081	$	—	$	—
	Marketable securities, current(2)			80,706			—			80,706			—			111,333		—		111,333		—
	Deferred compensation trusts(3)			94,893			94,893			—			—			87,507		87,507		—		—
	Marketable securities, noncurrent(4)			343,644			—			343,644			—			275,402		—		275,402		—
	Derivative assets(5)
	Commodity contracts			561			—			561			—			438		—		438		—
	Foreign currency contracts			180			—			180			—			855		—		855		—
	Liabilities:
	Derivative liabilities(5)
	Commodity contracts		$	2,290		$	—		$	2,290		$	—		$	3	$	—	$	3	$	—
	Foreign currency contracts			4,392			—			4,392			—			967		—		967		—
	-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, corporate debt securities and commercial paper 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 "7. Derivatives and Hedging" for the classification of commodity and foreign currency contracts in the 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 December 31, 2014: 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. As of December 31, 2013, available-for-sale securities consisted of money market funds of $50 million, U.S. agency securities of $119 million, U.S. Treasury securities of $26 million, corporate debt securities of $235 million and commercial paper of $7 million. The amortized cost of these available-for-sale securities is not materially different from the fair value. During 2014, 2013 and 2012, proceeds from sales and maturities of available-for-sale securities were $274 million, $346 million and $523 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 Consolidated Balance Sheet are as follows:
					December 31, 2014						December 31, 2013
			Fair Value
	(in thousands)		Hierarchy		Carrying Value			Fair Value			Carrying Value			Fair Value
	Assets:
	Cash(1)		Level 1		$	1,224,834		$	1,224,834		$	1,444,656		$	1,444,656
	Cash equivalents(2)		Level 2			753,872			753,872			788,845			788,845
	Marketable securities, current(3)		Level 2			24,425			24,425			74,690			74,690
	Notes receivable, including noncurrent portion(4)		Level 3			19,284			19,284			27,602			27,602
	Liabilities:
	3.375% Senior Notes(5)		Level 2		$	497,045		$	510,465		$	496,604		$	484,204
	3.5% Senior Notes(5)		Level 2			494,640			498,914			—			—
	1.5% Convertible Senior Notes(5)		Level 2			18,324			40,826			18,398			54,027
	Other borrowings(6)		Level 2			10,418			10,418			11,441			11,441
	-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 carry 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	12 Months Ended
	Dec. 31, 2014
Derivatives and Hedging
Derivatives and Hedging
	7.     Derivatives and Hedging
	As of December 31, 2014, the company had total gross notional amounts of $235 million of foreign currency contracts and $12 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 2016. 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 years ended December 31, 2014, 2013 and 2012.
	The fair values of derivatives designated as hedging instruments under ASC 815 as of December 31, 2014 and 2013 were as follows:
		Asset Derivatives								Liability Derivatives
	(in thousands)	Balance Sheet		December 31,			December 31,			Balance Sheet		December 31,			December 31,
		Location		2014			2013			Location		2014			2013
	Commodity contracts	Other current assets		$	365		$	296		Other accrued liabilities		$	1,362		$	3
	Foreign currency contracts	Other current assets			128			855		Other accrued liabilities			3,721			967
	Commodity contracts	Other assets			196			142		Noncurrent liabilities			928			—
	Foreign currency contracts	Other assets			52			—		Noncurrent liabilities			671			—
	Total			$	741		$	1,293				$	6,682		$	970
	The pre-tax net gains (losses) recognized in earnings associated with the hedging instruments designated as fair value hedges for the years ended December 31, 2014, 2013 and 2012 were as follows:
	Fair Value Hedges (in thousands)	Location of Gain (Loss)		2014			2013			2012
	Foreign currency contracts	Corporate general and administrative expense		$	(3,322	)	$	2,885		$	(14,236	)
	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 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 years ended December 31, 2014, 2013 and 2012 was as follows:
		After-Tax Amount of Gain											After-Tax Amount of Gain
		(Loss) Recognized in OCI											(Loss) Reclassified from
													AOCI into Earnings
	Cash Flow Hedges (in thousands)	2014			2013			2012			Location of Gain (Loss)		2014			2013			2012
	Commodity contracts	$	(881	)	$	265		$	1,138		Total cost of revenue		$	(59	)	$	50		$	1,859
	Foreign currency contracts		(1,270	)		(2,801	)		2,933		Total cost of revenue			269			(2,855	)		1,441
	Interest rate contracts		—			—			—		Interest expense			(1,049	)		(1,049	)		(1,049	)
	Total	$	(2,151	)	$	(2,536	)	$	4,071				$	(839	)	$	(3,854	)	$	2,251

Financing_Arrangements

Financing Arrangements	12 Months Ended
	Dec. 31, 2014
Financing Arrangements
Financing Arrangements
	8.     Financing Arrangements
	As of December 31, 2014, 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 Agreement and a $1.8 billion Revolving Loan and Letter of Credit Facility Agreement. Both facilities mature in May 2019. 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.
	Letters of credit are provided in the ordinary course of business primarily to indemnify the company's clients if the company fails to perform its obligations under its contracts. As of December 31, 2014, letters of credit and borrowings totaling $1.4 billion were outstanding under these committed and uncommitted lines of credit. As an alternative to letters of credit, surety bonds are used as a form of credit enhancement.
	Consolidated debt consisted of the following:
		December 31,
	(in thousands)	2014		2013
	Current:
	1.5% Convertible Senior Notes	$	18,324	$	18,398
	Other borrowings		10,418		11,441
	Long-Term:
	3.375% Senior Notes	$	497,045	$	496,604
	3.5% Senior Notes		494,640		—
	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. Interest on the 2004 Notes is payable semi-annually on February 15 and August 15 of each year. The 2004 Notes are convertible into shares of the company's common stock par value $0.01 per share, at a conversion rate of 36.6729 shares per each $1,000 principal amount of the 2004 Notes, subject to adjustment as described in the indenture. The 2004 Notes are convertible during any fiscal quarter if the closing price of the company's common stock for at least 20 trading days in the 30 consecutive trading day-period ending on the last trading day of the previous fiscal quarter is greater than or equal to 130 percent of the conversion price in effect on that 30th trading day (the "trigger price"). The trigger price is currently $35.45, but is subject to adjustment as outlined in the indenture. The trigger price condition was satisfied during the fourth quarter of 2014 and 2013 and the 2004 Notes were therefore classified as short-term debt as of December 31, 2014 and 2013, respectively.
	Holders of the 2004 Notes were entitled to require the company to purchase all or a portion of their 2004 Notes on February 17, 2009 and February 15, 2014 at 100 percent of the principal amount plus accrued and unpaid interest; a de minimis amount of 2004 Notes were tendered for purchase. Holders of the 2004 Notes will again be entitled to have the company purchase their 2004 Notes at the same price on February 15, 2019. The 2004 Notes are currently redeemable at the option of the company, in whole or in part, at 100 percent of the principal amount plus accrued and unpaid interest. In the event of a change of control of the company, each holder may require the company to repurchase the 2004 Notes for cash, in whole or in part, at 100 percent of the principal amount plus accrued and unpaid interest.
	Pursuant to the requirements of ASC 260-10, "Earnings per Share," ("EPS") the company includes in the diluted EPS computations, based on the treasury stock method, shares that may be issuable upon conversion of the 2004 Notes. On December 30, 2004, the company irrevocably elected to pay the principal amount of the 2004 Notes in cash, and therefore there is no dilutive impact on EPS unless the average stock price exceeds the conversion price of $27.27. Upon conversion, shares of the company's common stock are issued to satisfy any appreciation between the conversion price and the market price on the date of conversion. During 2014, holders converted less than $0.1 million of the 2004 Notes in exchange for the principal balance owed in cash plus 1,750 shares of the company's common stock. During 2013, holders converted less than $0.1 million of the 2004 Notes in exchange for the principal balance owed in cash plus 1,562 shares of the company's common stock.
	The company applies the provisions of ASC 470-20, "Debt with Conversion and Other Options." ASC 470-20 requires the issuer of a convertible debt instrument to separately account for the liability and equity components in a manner that reflects the entity's nonconvertible debt borrowing rate when interest expense is recognized in subsequent periods.
	The following table presents information related to the liability and equity components of the 2004 Notes:
		December 31,
	(in thousands)	2014		2013
	Carrying value of the equity component	$	19,516	$	19,519
	Principal amount and carrying value of the liability component		18,324		18,398
	Interest expense on the 2004 Notes for the years ended December 31, 2014, 2013 and 2012 includes original coupon interest of $0.3 million for all years. The effective interest rate on the liability component was 4.375 percent through February 15, 2009 at which time the discount on the liability was fully amortized. The if-converted value is $41 million and is in excess of the principal value as of December 31, 2014.
	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 $10 million and $11 million as of December 31, 2014 and 2013, respectively.
	As of December 31, 2014, the company was in compliance with all of the financial covenants related to its debt agreements.

Other_Noncurrent_Liabilities

Other Noncurrent Liabilities	12 Months Ended
	Dec. 31, 2014
Other Noncurrent Liabilities
Other Noncurrent Liabilities
	9.     Other Noncurrent Liabilities
	The company has deferred compensation and retirement arrangements for certain key executives which generally provide for payments upon retirement, death or termination of employment. The deferrals can earn either market-based fixed or variable rates of return, at the option of the participants. As of December 31, 2014 and 2013, $428 million and $415 million, respectively, of obligations related to these plans were included in noncurrent liabilities. To fund these obligations, the company has established non-qualified trusts, which are classified as noncurrent assets. These trusts primarily hold company-owned life insurance policies, reported at cash surrender value, and marketable equity securities, reported at fair value. These trusts were valued at $405 million and $388 million as of December 31, 2014 and 2013, respectively. Periodic changes in value of these trust investments, most of which are unrealized, are recognized in earnings, and serve to mitigate changes to obligations included in noncurrent liabilities which are also reflected in earnings.
	The company maintains appropriate levels of insurance for business risks, including workers compensation and general liability. Insurance coverages contain various retention amounts for which the company provides accruals based on the aggregate of the liability for reported claims and an actuarially determined estimated liability for claims incurred but not reported. Other noncurrent liabilities included $27 million and $28 million as of December 31, 2014 and 2013, respectively, relating to these liabilities. For certain professional liability risks the company's retention amount under its claims-made insurance policies does not include an accrual for claims incurred but not reported because there is insufficient claims history or other reliable basis to support an estimated liability. The company believes that retained professional liability amounts are manageable risks and are not expected to have a material adverse impact on results of operations or financial position.

StockBased_Plans

Stock-Based Plans	12 Months Ended
	Dec. 31, 2014
Stock-Based Plans
Stock-Based Plans
	10.   Stock-Based Plans
	The company's executive stock-based plans provide for grants of nonqualified or incentive stock options, restricted stock awards or units, stock appreciation rights and performance-based Value Driver Incentive ("VDI") units. All executive stock-based plans are administered by the Organization and Compensation Committee of the Board of Directors ("Committee") comprised of outside directors, none of whom are eligible to participate in the executive plans. Recorded compensation cost for stock-based payment arrangements, which is generally recognized on a straight-line basis, totaled $45 million, $54 million and $40 million for the years ended December 31, 2014, 2013 and 2012, respectively, net of recognized tax benefits of $27 million, $32 million and $24 million for the years ended 2014, 2013 and 2012, respectively.
	The following table summarizes restricted stock, restricted stock unit and stock option activity:
		Restricted Stock or						Stock Options
		Restricted Stock Units
		Number			Weighted			Number			Weighted
					Average						Average
					Grant Date						Exercise Price
					Fair Value						Per Share
					Per Share
	Outstanding as of December 31, 2011		1,294,615		$	44.33			2,899,501		$	50
	Granted		450,668			61.7			688,380			62.18
	Expired or canceled		(17,109	)		58.35			(45,164	)		61.57
	Vested/exercised		(657,998	)		43.46			(309,692	)		37.41
	Outstanding as of December 31, 2012		1,070,176		$	51.96			3,233,025		$	53.64
	Granted		482,959			61.62			884,574			61.45
	Expired or canceled		(11,104	)		62.35			(15,607	)		65.46
	Vested/exercised		(564,265	)		50.65			(1,137,285	)		46.53
	Outstanding as of December 31, 2013		977,766		$	57.36			2,964,707		$	58.63
	Granted		370,014			79.06			684,486			79.19
	Expired or canceled		(30,032	)		69.17			(58,215	)		73.33
	Vested/exercised		(449,227	)		57.08			(417,970	)		57.67
	Outstanding as of December 31, 2014		868,521			66.35			3,173,008			62.92
					$						$
	Options exercisable as of December 31, 2014								1,728,445			57.38
											$
	Remaining unvested options outstanding and expected to vest								1,401,226			69.55
											$
	As of December 31, 2014, there were a maximum of 11,909,687 shares available for future grant under the company's various stock-based plans. Shares available for future grant included shares which may be granted by the Committee as either stock options, on a share-for-share basis, or restricted stock awards, restricted stock units and VDI units on the basis of one share for each 2.25 available shares.
	Restricted stock units and restricted shares issued under the plans provide that shares awarded may not be sold or otherwise transferred until service-based restrictions have lapsed and any performance objectives have been attained as established by the Committee. Restricted stock units are rights to receive shares subject to certain service and performance conditions as established by the Committee. Generally, upon termination of employment, restricted stock units and restricted shares which have not vested are forfeited. For the company's executives, the restricted units granted in 2014, 2013 and 2012 generally vest ratably over three years. For the company's directors, the restricted units and shares granted in 2014, 2013 and 2012 vest or vested on the first anniversary of the grant. For the years 2014, 2013 and 2012, recognized compensation expense of $31 million, $28 million and $25 million, respectively, is included in corporate general and administrative expense related to restricted stock awards and units. The fair value of restricted stock that vested during 2014, 2013 and 2012 was $35 million, $36 million and $38 million, respectively. The balance of unamortized restricted stock expense as of December 31, 2014 was $15 million, which is expected to be recognized over a weighted-average period of 1.3 years.
	Option grant amounts and award dates are established by the Committee. Option grant prices are the fair value of the company's common stock at such date of grant. Options normally extend for 10 years and become exercisable over a vesting period determined by the Committee. The options granted in 2014, 2013 and 2012 vest ratably over three years. The aggregate intrinsic value, representing the difference between market value on the date of exercise and the option price, of stock options exercised during 2014, 2013 and 2012 was $8 million, $29 million and $7 million, respectively. The balance of unamortized stock option expense as of December 31, 2014 was $6 million, which is expected to be recognized over a weighted-average period of 1.1 years. Expense associated with stock options for the years ended December 31, 2014, 2013 and 2012, which is included in corporate general and administrative expense in the accompanying Consolidated Statement of Earnings, totaled $17 million, $15 million and $13 million, respectively.
	The fair value on the grant date and the significant assumptions used in the Black-Scholes option-pricing model are as follows:
		December 31,
		2014			2013
	Weighted average grant date fair value	$	23.04		$	17.22
	Expected life of options (in years)		5.8			4.5
	Risk-free interest rate		1.8	%		0.8	%
	Expected volatility		31.6	%		35.8	%
	Expected annual dividend per share	$	0.84		$	0.64
	The computation of the expected volatility assumption used in the Black-Scholes calculations is based on a 50/50 blend of historical and implied volatility.
	Information related to options outstanding as of December 31, 2014 is summarized below:
		Options Outstanding									Options Exercisable
	Range of Exercise Prices	Number			Weighted			Weighted			Number		Weighted		Weighted
		Outstanding			Average			Average			Exercisable		Average		Average
					Remaining			Exercise Price					Remaining		Exercise Price
					Contractual			Per Share					Contractual		Per Share
					Life (In Years)								Life (In Years)
	$30.46 - $41.77		176,161			4.2		$	30.46			176,161		4.2	$	30.46
	$42.11 - $62.50		1,713,173			6.8			57.50			919,859		6.0		53.93
	$68.36 - $80.12		1,283,674			7.1			74.61			632,425		5.1		69.90
			3,173,008			6.8		$	62.92			1,728,445		5.4	$	57.38
	As of December 31, 2014, options outstanding and options exercisable both had an aggregate intrinsic value of approximately $12 million.
	Performance-based VDI units issued under the plans are based on target award values. The number of units awarded is determined by dividing the applicable target award value by the closing price of the company's common stock on the date of grant. The number of units is adjusted at the end of each performance period based on the achievement of performance criteria. The VDI awards granted in 2014 and 2013 vest after a period of approximately three years. The VDI awards granted in 2012 vest on the first and third anniversaries of the date of grant. The awards 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, these awards are classified as liabilities and remeasured at fair value at the end of each reporting period until the awards are settled. Compensation expense of $24 million, $43 million and $26 million related to these awards is included in corporate general and administrative expense in 2014, 2013 and 2012, respectively, of which $21 million was paid in 2014. The balance of unamortized compensation expense associated with VDI units as of December 31, 2014 was $15 million, which is expected to be recognized over a weighted-average period of 1.9 years.

Earnings_Per_Share

Earnings Per Share	12 Months Ended
	Dec. 31, 2014
Earnings Per Share
Earnings Per Share
	11.   Earnings Per Share
	Basic EPS is calculated by dividing net earnings attributable to Fluor Corporation by the weighted average number of common shares outstanding during the period. Potentially dilutive securities include employee stock options, restricted stock units and shares, VDI units and the 1.5% Convertible Senior Notes (see "8. Financing Arrangements" above for information about the Convertible Senior Notes). Diluted 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 years ended December 31, 2014, 2013 and 2012 under the treasury stock method are presented below:
		Year Ended December 31,
	(in thousands, except per share amounts)	2014			2013		2012
	Amounts attributable to Fluor Corporation:
	Earnings from continuing operations	$	715,460		$	667,711	$	456,330
	Loss from discontinued operations, net of taxes		(204,551	)		—		—
	Net earnings	$	510,909		$	667,711	$	456,330
	Basic EPS attributable to Fluor Corporation:
	Weighted average common shares outstanding		157,487			162,566		167,121
	Earnings from continuing operations		4.54			4.11		2.73
		$			$		$
	Loss from discontinued operations, net of taxes		(1.30	)		—		—
	Net earnings	$	3.24		$	4.11	$	2.73
	Diluted EPS attributable to Fluor Corporation:
	Weighted average common shares outstanding		157,487			162,566		167,121
	Diluted effect:
	Employee stock options, restricted stock units and shares and VDI units		1,719			1,383		1,024
	Conversion equivalent of dilutive convertible debt		410			405		346
	Weighted average diluted shares outstanding		159,616			164,354		168,491
	Earnings from continuing operations		4.48			4.06		2.71
		$			$		$
	Loss from discontinued operations, net of taxes		(1.28	)		—		—
	Net earnings	$	3.2		$	4.06	$	2.71
	Anti-dilutive securities not included above		769			1,436		1,557
	During the years ended December 31, 2014, 2013 and 2012, the company repurchased and canceled 13,331,402; 2,591,557; and 7,409,200 shares of its common stock, respectively, under its stock repurchase program for $906 million, $200 million, and $389 million, respectively.

Lease_Obligations

Lease Obligations	12 Months Ended
	Dec. 31, 2014
Lease Obligations
Lease Obligations
	12.   Lease Obligations
	Net rental expense amounted to approximately $218 million, $206 million and $181 million in the years ended December 31, 2014, 2013 and 2012, respectively. The company's lease obligations relate primarily to office facilities, equipment used in connection with long-term construction contracts and other personal property. Net rental expense in 2014 was higher compared to 2013, primarily due to an increase in rental equipment required to support project execution activities in the Oil & Gas segment. Net rental expense in 2013 was higher compared to 2012, primarily due to an increase in rental equipment required to support project execution activities in the Industrial & Infrastructure segment.
	The company's obligations for minimum rentals under non-cancelable operating leases are as follows:
	Year Ended December 31,	(in thousands)
	2015	$	48,800
	2016		47,100
	2017		38,400
	2018		28,600
	2019		23,200
	Thereafter		49,600

Noncontrolling_Interests

Noncontrolling Interests	12 Months Ended
	Dec. 31, 2014
Noncontrolling Interests.
Noncontrolling Interests
	13.   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 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 years ended December 31, 2014, 2013 and 2012, net earnings attributable to noncontrolling interests were $137 million, $155 million and $115 million, respectively. Income taxes associated with earnings attributable to noncontrolling interests were immaterial in all periods presented. Distributions paid to noncontrolling interests were $138 million, $125 million and $101 million for the years ended December 31, 2014, 2013 and 2012, respectively. Capital contributions by noncontrolling interests were $3 million, $2 million and $3 million for the years ended December 31, 2014, 2013 and 2012, respectively.

Contingencies_and_Commitments

Contingencies and Commitments	12 Months Ended
	Dec. 31, 2014
Contingencies and Commitments
Contingencies and Commitments
	14.   Contingencies and Commitments
	The company and certain of its subsidiaries are subject to litigation, claims, performance guarantees, 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 December 31, 2014, 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). As a result of the company's updated assessment of the estimated loss contingency related to these matters, the company recorded an after-tax loss from discontinued operations of $205 million during the year ended December 31, 2014. In January 2015, the company paid approximately $300 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.
	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 $17.7 billion as of December 31, 2014. 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 December 31, 2014 and 2013 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 require the borrower to pledge collateral to support the fulfillment of the borrower's obligation.
	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 and $20 million as of December 31, 2014 and 2012, respectively, and are included in contract work in progress in the accompanying Consolidated Balance Sheet. There were no recognized claims against clients as of December 31, 2013.
	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.
	The company's operations are subject to and affected by federal, state and local laws and regulations regarding the protection of the environment. The company maintains reserves for potential future environmental cost where such obligations are either known or considered probable, and can be reasonably estimated. The company believes, based upon present information available to it, that its reserves with respect to future environmental cost are adequate and such future cost will not have a material effect on the company's consolidated financial position, results of operations or liquidity.

Variable_Interest_Entities

Variable Interest Entities	12 Months Ended
	Dec. 31, 2014
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 Consolidated Statement of Earnings and uses the one-line equity method of accounting in the 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 "Other accrued liabilities" in the Consolidated Balance Sheet was a net asset of $107 million and $122 million as of December 31, 2014 and 2013, 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 December 31, 2014 for the unconsolidated VIEs were $20 million.
	In some cases, the company is required to consolidate certain VIEs. 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. As of December 31, 2013, the carrying values of the assets and liabilities associated with the operations of the consolidated VIEs were $1.2 billion and $731 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 "14. Contingencies and Commitments" for a further discussion of such agreements. Below is a discussion of the company's more significant or unique VIEs and related accounting considerations.
	Interstate 95 High-Occupancy Toll ("HOT") Lanes Project
	In August 2012, the company was awarded the $925 million Interstate 95 HOT Lanes Project in Virginia through a public-private partnership between the Virginia Department of Transportation ("VDOT") and 95 Express Lanes, LLC, a joint venture in which the company had a 10 percent interest and Transurban (USA) Inc. had a 90 percent interest. In 2014, the company sold its interest in 95 Express Lanes, LLC to Transurban (USA) Inc.
	VDOT owns and oversees the addition and extension of HOT lanes, interchange improvements and construction of commuter parking lots on 29 miles of I-95 in northern Virginia. As concessionaire, Transurban (USA) Inc. is responsible for developing, designing, financing, constructing, maintaining and operating the improvements and HOT lanes under a 75-year concession agreement. The construction is being financed primarily through grant funding from VDOT, private activity bonds, a non-recourse loan from the federal Transportation Infrastructure Finance Innovation Act ("TIFIA"), which is administered by the U.S. Department of Transportation, and equity contributions from the joint venture members.
	The construction of the improvements and HOT lanes is being performed by a construction joint venture in which the company has a 65 percent interest and Lane Construction has a 35 percent interest ("Fluor-Lane 95"). The company has evaluated its interest in Fluor-Lane 95 and has determined that it is the primary beneficiary. Accordingly, the company consolidates the accounts of Fluor-Lane 95. As of December 31, 2014, the company's financial statements included assets of $82 million and liabilities of $64 million for Fluor-Lane 95. As of December 31, 2013, the company's financial statements included assets of $119 million and liabilities of $115 million for Fluor-Lane 95.
	Eagle P3 Commuter Rail Project
	In August 2010, the company was awarded its $1.7 billion share of the Eagle P3 Commuter Rail Project in the Denver metropolitan area. The project is a public-private partnership between the Regional Transportation District in Denver, Colorado ("RTD") and Denver Transit Partners ("DTP"), a wholly-owned subsidiary of Denver Transit Holdings LLC ("DTH"), a joint venture in which the company has a 10 percent interest, with two additional partners each owning a 45 percent interest. Under the agreement, RTD owns and oversees the addition of railways, facilities and rolling stock for three new commuter and light rail corridors in the Denver metropolitan area. RTD is funding the construction of the railways and facilities through the issuance of $398 million of private activity bonds, as well as from various other sources, including federal grants. RTD advanced the proceeds of the private activity bonds to DTP as a loan that is non-recourse to the company and will be repaid to RTD over the life of the concession agreement. DTP, as concessionaire, will design, build, finance, operate and maintain the railways, facilities and rolling stock under a 35-year concession agreement. The company has determined that DTH is a VIE for which the company is not the primary beneficiary. DTH is accounted for under the equity method of accounting. Based on contractual documents, the company's maximum exposure to loss relating to its investments in DTH is limited to its future funding commitment of $5 million, plus the carrying value of its investment of $1 million.
	The construction of the railways and facilities is being performed through subcontract arrangements by Denver Transit Systems ("DTS") and Denver Transit Constructors ("DTC"), construction joint ventures in which the company has an ownership interest of 50 percent and 40 percent, respectively. The company has determined that DTS and DTC are VIEs for which the company is the primary beneficiary. Therefore, the company consolidates the accounts of DTS and DTC in its financial statements. As of December 31, 2014, the combined carrying values of the assets and liabilities of DTS and DTC were $108 million and $49 million, respectively. As of December 31, 2013, the combined carrying values of the assets and liabilities of DTS and DTC were $150 million and $72 million, respectively. The company has provided certain performance guarantees on behalf of DTS.
	Fluor SKM Joint Venture
	In 2008, the Fluor SKM joint venture was awarded the initial program management, engineering and construction management contract for the expansion of port, rail and mine facilities for BHP Billiton Limited's iron ore mining project in the Pilbara region of Western Australia. Fluor SKM is a joint venture between Fluor Australia Pty Ltd and Sinclair Knight Merz ("Fluor SKM") in which Fluor Australia Pty Ltd has a 55 percent interest and Sinclair Knight Merz has the remaining 45 percent interest.
	The company has evaluated its interest in Fluor SKM and has determined that the company is the primary beneficiary. Accordingly, the company consolidates the accounts of Fluor SKM. For the years ended December 31, 2014, 2013 and 2012, the company's results of operations included revenue of $437 million, $1.8 billion and $3.4 billion, respectively. As of December 31, 2014, the carrying values of the assets and liabilities of the Fluor SKM joint venture were $24 million and $26 million, respectively. As of December 31, 2013, the carrying values of the assets and liabilities of the Fluor SKM joint venture were $62 million and $83 million, respectively.

Operations_by_Business_Segment

Operations by Business Segment and Geographic Area	12 Months Ended
	Dec. 31, 2014
Operations by Business Segment and Geographical Area
Operations by Business Segment and Geographical Area
	16.   Operations by Business Segment and Geographic Area
	The company provides professional services in the fields of engineering, procurement, construction, fabrication and modularization, commissioning and maintenance, as well as project management, on a global basis and serves a diverse set of industries worldwide. The five principal business segments are: Oil & Gas, Industrial & Infrastructure, Government, Global Services and Power, as discussed further below.
	The Oil & Gas segment provides design, engineering, procurement, construction and project management services for upstream oil and gas production, liquefied natural gas, downstream refining, offshore production, pipeline, chemicals and petrochemicals markets. The revenue of a single customer and its affiliates of the Oil & Gas segment amounted to 15 percent, 12 percent and 11 percent of the company's consolidated revenue during the year ended December 31, 2014, 2013 and 2012, respectively.
	The Industrial & Infrastructure segment provides design, engineering, procurement, construction, operations and maintenance and project management services to the mining and metals, transportation, life sciences, manufacturing, commercial and institutional, telecommunications, microelectronics and water sectors. The revenue of a single customer and its affiliates of the Industrial & Infrastructure segment amounted to 13 percent of the company's consolidated revenue during the year ended December 31, 2012.
	The Government segment provides engineering, construction, logistics, base and facilities operations and maintenance, contingency response and environmental and nuclear services to the U.S. government and governments abroad. The percentage of the company's consolidated revenue from work performed for various agencies of the U.S. government was 11 percent, 10 percent and 12 percent during the years ended December 31, 2014, 2013 and 2012, respectively.
	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. The Global Services segment includes site equipment and tool services, industrial fleet services, fabrication, construction and modularization services and supply chain solutions. In addition, Global Services provides temporary staffing of technical, professional and administrative personnel for projects in all segments.
	The Power segment provides engineering, procurement, construction, program management, start-up and commissioning, operations and maintenance and technical services to the gas fueled, solid fueled, environmental compliance, renewables, nuclear and power services markets. The Power segment includes the operations of NuScale Power, LLC, the Oregon-based designer of small modular nuclear reactors, which is managed as a separate operating segment within the Power segment.
	The reportable segments follow the same accounting policies as those described in Major Accounting Policies. Management evaluates a segment's performance based upon segment profit. The company incurs cost and expenses and holds certain assets at the corporate level which relate to its business as a whole. Certain of these amounts have been charged to the company's business segments by various methods, largely on the basis of usage. Total assets not allocated to segments and held in "Corporate and other" primarily include cash, marketable securities, income-tax related assets, pension assets, deferred compensation trust assets and corporate property, plant and equipment.
	Operating Information by Segment
			Year Ended December 31,
	(in millions)		2014			2013			2012
	External revenue
	Oil & Gas		$	11,368.90		$	11,519.80		$	9,513.90
	Industrial & Infrastructure			6,061.70			11,081.70			13,237.80
	Government			2,511.90			2,749.10			3,304.70
	Global Services			585			611.8			679.6
	Power			1,004.10			1,389.20			841.1
	Total external revenue		$	21,531.60		$	27,351.60		$	27,577.10
	Segment profit (loss)
	Oil & Gas		$	673.4		$	441.1		$	334.7
	Industrial & Infrastructure			391.2			476			176.5
	Government			92.7			161.4			149.7
	Global Services			73.8			119.7			125.4
	Power			31.3			11.7			(16.9	)
	Total segment profit		$	1,262.40		$	1,209.90		$	769.4
	Depreciation and amortization of fixed assets
	Oil & Gas		$	—		$	—		$	—
	Industrial & Infrastructure			2.6			1.5			2.4
	Government			5.4			9.5			12.9
	Global Services			111.8			117.7			124.6
	Power			1.6			1.1			0.9
	Corporate and other			70.3			76.5			69.6
	Total depreciation and amortization of fixed assets		$	191.7		$	206.3		$	210.4
	Capital expenditures
	Oil & Gas		$	—		$	—		$	—
	Industrial & Infrastructure			8.3			2.9			0.5
	Government			2.2			4.1			5.7
	Global Services			224			145.3			184.5
	Power			2.1			1.3			3.6
	Corporate and other			88.1			134.9			60.4
	Total capital expenditures		$	324.7		$	288.5		$	254.7
	Total assets
	Oil & Gas		$	1,708.20		$	1,643.80
	Industrial & Infrastructure			871.9			909.7
	Government			540.1			580.6
	Global Services			795.3			758.9
	Power			178.6			154.9
	Corporate and other			4,100.30			4,276.00
	Total assets		$	8,194.40		$	8,323.90
	Goodwill
	Oil & Gas		$	7.1		$	7.1
	Industrial & Infrastructure			16.9			18.6
	Government			58			57.5
	Global Services			20.4			20.3
	Power			10.6			10.6
	Total goodwill		$	113		$	114.1
	•	Industrial & Infrastructure.  Segment profit for 2012 included pre-tax charges for the Greater Gabbard Project totaling $416 million as well as a pre-tax gain of $43 million on the sale of the company's unconsolidated interest in a telecommunications company located in the United Kingdom.
	•	Government.  Segment profit in 2013 included pre-tax income of $57 million resulting from the favorable resolution of various issues with the U.S. government related to 2001 - 2013. Of this amount, $31 million was the result of resolving challenges as to the reimbursability of certain costs, $11 million was the result of a favorable court ruling that resolved certain disputed items and $15 million was related to the closeout and final disposition of other matters.
	•	Global Services.  During 2014, 2013 and 2012, intercompany revenue for the Global Services segment, excluded from the amounts shown above, was $531 million, $505 million and $462 million, respectively.
	•	Power.  Segment profit for 2014, 2013 and 2012 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 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 $46 million, $53 million and $63 million during 2014, 2013 and 2012, respectively. NuScale expenses for 2014 were reported net of qualified reimbursable expenses of $38 million. The company recognizes the cost-sharing award with the DOE, when earned, as a reduction of "Total cost of revenue" in the 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.
	Reconciliation of Segment Information to Consolidated Amounts
			Year Ended December 31,
	(in millions)		2014			2013			2012
Total segment profit			1,262.40			1,209.90			769.4
		$			$			$
Corporate general and administrative expense			(182.7	)		(175.1	)		(151.0	)
Interest expense, net			(11.4	)		(12.5	)		(0.5	)
Earnings attributable to noncontrolling interests			136.6			155.3			115.6
Earnings from continuing operations before taxes		$	1,204.90		$	1,177.60		$	733.5
Operating Information by Geographic Area
Engineering services for international projects are often performed within the United States or a country other than where the project is located. Revenue associated with these services has been classified within the geographic area where the work was performed.
		External Revenue									Total Assets
		Year Ended December 31,									As of December 31,
(in millions)		2014			2013			2012			2014		2013
United States			7,466.2			7,295.0			7,021.4			4,598.4		4,329.4
		$			$			$			$		$
Canada			4,133.3			6,275.8			5,371.9			900.4		927.8
Asia Pacific (includes Australia)			2,568.0			4,503.4			6,349.7			724.7		791.4
Europe			2,070.1			2,096.3			1,632.9			1,178.0		1,150.4
Central and South America			2,494.8			3,509.7			3,526.5			371.7		657.8
Middle East and Africa			2,799.2			3,671.4			3,674.7			421.2		467.1
Total		$	21,531.6		$	27,351.6		$	27,577.1		$	8,194.4	$	8,323.9
Non-Operating Expense
Non-operating expense items of $2 million and $12 million were included in corporate general and administrative expense in 2013 and 2012, respectively. There were no non-operating expenses during 2014.

Quarterly_Financial_Data_Unaud

Quarterly Financial Data (Unaudited)	12 Months Ended
	Dec. 31, 2014
Quarterly Financial Data (Unaudited)
Quarterly Financial Data (Unaudited)
	17.   Quarterly Financial Data (Unaudited)
	The following is a summary of the quarterly results of operations:
	(in millions, except per share amounts)	First Quarter		Second Quarter			Third Quarter			Fourth Quarter
	Year ended December 31, 2014
	Revenue	$	5,384.60	$	5,251.70		$	5,440.10		$	5,455.20
	Cost of revenue		5,072.30		4,906.40			5,060.00			5,093.80
	Earnings from continuing operations before taxes		271.5		285.3			343.4			304.7
	Earnings from continuing operations		193.3		195.2			228.7			234.9
	Loss from discontinued operations, net of taxes		—		(85.2	)		(113.8	)		(5.6	)
	Net earnings		193.3		110			114.9			229.3
	Net earnings attributable to Fluor Corporation		149.1		77.8			69.5			214.5
	Basic earnings (loss) per share attributable to Fluor Corporation:
	Earnings from continuing operations	$	0.93	$	1.03		$	1.17		$	1.43
	Loss from discontinued operations, net of taxes		—		(0.54	)		(0.73	)		(0.04	)
	Net earnings		0.93		0.49			0.44			1.39
	Diluted earnings (loss) per share attributable to Fluor Corporation:
	Earnings from continuing operations		0.92		1.02			1.15			1.41
	Loss from discontinued operations, net of taxes		—		(0.54	)		(0.71	)		(0.04	)
	Net earnings		0.92		0.48			0.44			1.37
	Year ended December 31, 2013
	Revenue	$	7,185.60	$	7,190.30		$	6,684.20		$	6,291.50
	Cost of revenue		6,843.80		6,857.50			6,329.70			5,955.40
	Earnings from continuing operations before taxes		306.3		298.7			304.7			267.9
	Earnings from continuing operations		213.3		207.3			217.4			185
	Loss from discontinued operations, net of taxes		—		—			—			—
	Net earnings		213.3		207.3			217.4			185
	Net earnings attributable to Fluor Corporation		166.5		161.4			173			166.8
	Basic earnings (loss) per share attributable to Fluor Corporation:
	Earnings from continuing operations	$	1.02	$	0.99		$	1.06		$	1.03
	Loss from discontinued operations, net of taxes		—		—			—			—
	Net earnings		1.02		0.99			1.06			1.03
	Diluted earnings (loss) per share attributable to Fluor Corporation:
	Earnings from continuing operations		1.02		0.98			1.05			1.01
	Loss from discontinued operations, net of taxes		—		—			—			—
	Net earnings		1.02		0.98			1.05			1.01
	Net earnings in the second, third and fourth quarters of 2014 included losses from discontinued operations in connection with the reassessment of estimated loss contingencies related to the previously divested lead business of St. Joe Minerals Corporation and The Doe Run Company in Herculaneum, Missouri.
	Net earnings in the fourth quarter of 2013 included pre-tax income of $57 million (or $0.22 per diluted share) resulting from the favorable resolution of various issues with the U.S. government related to 2001 - 2013. Of this amount, $31 million was the result of resolving challenges as to the reimbursability of certain costs, $11 million was the result of a favorable court ruling that resolved certain disputed items and $15 million was related to the closeout and final disposition of other matters.

Major_Accounting_Policies_Poli

Major Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2014
Major Accounting Policies
Principles of Consolidation	Principles of Consolidation
	The financial statements include the accounts of Fluor Corporation and its subsidiaries ("the company"). The company frequently forms joint ventures or partnerships with unrelated third parties for the execution of single contracts or projects. The company assesses its joint ventures and partnerships at inception to determine if any meet the qualifications of a variable interest entity ("VIE") in accordance with Accounting Standards Codification ("ASC") 810, "Consolidation." If a joint venture or partnership is a VIE and the company is the primary beneficiary, the joint venture or partnership is fully consolidated (see "15. Variable Interest Entities" below). For partnerships and joint ventures in the construction industry, unless full consolidation is required, the company generally recognizes its proportionate share of revenue, cost and profit in its Consolidated Statement of Earnings and uses the one-line equity method of accounting in the 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. At times, the company also executes projects through collaborative arrangements for which the company recognizes its relative share of revenue and cost.
	All significant intercompany transactions of consolidated subsidiaries are eliminated. Certain amounts in 2013 and 2012 have been reclassified to conform to the 2014 presentation. Management has evaluated all material events occurring subsequent to the date of the financial statements up to the filing date of this annual report on Form 10-K.
Use of Estimates	Use of Estimates
	The preparation of financial statements in accordance with accounting principles generally accepted in the United States requires management to make estimates and assumptions that affect reported amounts. These estimates are based on information available through the date of the issuance of the financial statements. Therefore, actual results could differ from those estimates.
Cash and Cash Equivalents	Cash and Cash Equivalents
	Cash and cash equivalents include securities with maturities of three months or less at the date of purchase. Securities with maturities beyond three months are classified as marketable securities within current and noncurrent assets.
Marketable Securities
	Marketable Securities
	Marketable securities consist of time deposits placed with investment grade banks with original maturities greater than three months, which by their nature are typically held to maturity, and are classified as such because the company has the intent and ability to hold them to maturity. Held-to-maturity securities are carried at amortized cost. The company also has investments in debt securities which are classified as available-for-sale because the investments may be sold prior to their maturity date. Available-for-sale securities are carried at fair value. The cost of securities sold is determined by using the specific identification method. Marketable securities are assessed for other-than-temporary impairment.
Engineering and Construction Contracts	Engineering and Construction Contracts
	The company recognizes engineering and construction contract revenue using the percentage-of-completion method, based primarily on contract cost incurred to date compared to total estimated contract cost. Cost of revenue includes an allocation of depreciation and amortization. Customer-furnished materials, labor and equipment and, in certain cases, subcontractor materials, labor and equipment, are included in revenue and cost of revenue when management believes that the company is responsible for the ultimate acceptability of the project. Contracts are generally segmented between types of services, such as engineering and construction, and accordingly, gross margin related to each activity is recognized as those separate services are rendered. Changes to total estimated contract cost or losses, if any, are recognized in the period in which they are determined. Pre-contract costs are expensed as incurred. Revenue recognized in excess of amounts billed is classified as a current asset under contract work in progress. Advances that are payments on account of contract work in progress of $471 million and $544 million as of December 31, 2014 and 2013, respectively, have been deducted from contract work in progress. Amounts billed to clients in excess of revenue recognized to date are classified as a current liability under advance billings on contracts. The company anticipates that substantially all incurred cost associated with contract work in progress as of December 31, 2014 will be billed and collected in 2015. The company recognizes revenue, but not profit, for certain significant 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 cost is probable and the amounts can be reliably estimated. Under ASC 605-35-25, these requirements are satisfied when the contract or other evidence provides a legal basis for the claim, additional costs were caused by circumstances that were unforeseen at the contract date and not the result of deficiencies in the company's performance, claim-related costs are identifiable and considered reasonable in view of the work performed, and evidence supporting the claim is objective and verifiable. Cost, but not profit, associated with unapproved change orders is accounted for in revenue when it is probable that the cost will be recovered through a change in the contract price. In circumstances where recovery is considered probable but the revenue cannot be reliably estimated, cost attributable to change orders is deferred pending determination of the impact on contract price. If the requirements for recognizing revenue for claims or unapproved change orders are met, revenue is recorded only to the extent that costs associated with the claims or unapproved change orders have been incurred. The company generally provides limited warranties for work performed under its engineering and construction contracts. The warranty periods typically extend for a limited duration following substantial completion of the company's work on a project. Historically, warranty claims have not resulted in material costs incurred, and any estimated costs for warranties are included in the individual project cost estimates for purposes of accounting for long-term contracts.
Property, Plant and Equipment	Property, Plant and Equipment
	Property, plant and equipment are recorded at cost. Leasehold improvements are amortized over the shorter of their economic lives or the lease terms. Depreciation is calculated using the straight-line method over the following ranges of estimated useful service lives, in years:
		December 31,						Estimated
								Useful
								Service
	(cost in thousands)		2014			2013		Lives
	Buildings			281,852			282,842
			$			$				20 – 40
	Building and leasehold improvements			172,789			175,740			6 – 20
	Machinery and equipment			1,305,623			1,328,434			2 – 10
	Furniture and fixtures			142,961			146,498			2 – 10
Goodwill and Intangible Assets	Goodwill and Intangible Assets
	Goodwill is not amortized but is subject to annual impairment tests. Interim testing for impairment is performed if indicators of potential impairment exist. For purposes of impairment testing, goodwill is allocated to the applicable reporting units based on the current reporting structure. When testing goodwill for impairment quantitatively, the company first compares the fair value of each reporting unit with its carrying amount. If the carrying amount of a reporting unit exceeds its fair value, a second step is performed to measure the amount of potential impairment. In the second step, the company compares the implied fair value of reporting unit goodwill with the carrying amount of the reporting unit's goodwill. If the carrying amount of reporting unit goodwill exceeds the implied fair value of that goodwill, an impairment loss is recognized. During 2014, the company completed its annual goodwill impairment test in the first quarter and quantitatively determined that none of the goodwill was impaired. Goodwill for each of the company's segments is shown in "16. Operations by Business Segment and Geographical Area."
	The company had intangible assets with a carrying value of $23 million and $24 million as of December 31, 2014 and 2013, respectively. Intangible assets with indefinite lives are not amortized but are subject to annual impairment tests. Interim testing for impairment is also performed if indicators of potential impairment exist. An intangible asset with an indefinite life is impaired if its carrying value exceeds its fair value. As of December 31, 2014, none of the company's intangible assets with indefinite lives were impaired. Intangible assets with finite lives are amortized on a straight-line basis over the useful lives of those assets, ranging from one year to ten years.
Income Taxes	Income Taxes
	Deferred tax assets and liabilities are recognized for the expected future tax consequences of events that have been recognized in the company's financial statements or tax returns. The company evaluates the realizability of its deferred tax assets and maintains a valuation allowance, if necessary, to reduce certain deferred tax assets to amounts that are more likely than not to be realized. The factors used to assess the likelihood of realization are the company's forecast of future taxable income and available tax planning strategies that could be implemented to realize the net deferred tax assets. Failure to achieve forecasted taxable income in the applicable taxing jurisdictions could affect the ultimate realization of deferred tax assets and could result in an increase in the company's effective tax rate on future earnings.
	Income tax positions must meet a more-likely-than-not recognition threshold to be recognized. Income tax positions that previously failed to meet the more-likely-than-not threshold are recognized in the first subsequent financial reporting period in which that threshold is met. Previously recognized tax positions that no longer meet the more-likely-than-not threshold are derecognized in the first subsequent financial reporting period in which that threshold is no longer met. The company recognizes potential interest and penalties related to unrecognized tax benefits within its global operations in income tax expense.
	Judgment is required in determining the consolidated provision for income taxes as the company considers its worldwide taxable earnings and the impact of the continuing audit process conducted by various tax authorities. The final outcome of these audits by foreign jurisdictions, the Internal Revenue Service and various state governments could differ materially from that which is reflected in the Consolidated Financial Statements.
Derivatives and Hedging	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 accumulated other comprehensive income (loss) ("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.
	Under ASC 815, in certain limited circumstances, foreign currency payment provisions could be deemed embedded derivatives. As of December 31, 2014, 2013 and 2012, the company had no significant embedded derivatives in any of its contracts.
	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.
Concentrations of Credit Risk	Concentrations of Credit Risk
	Accounts receivable and all contract work in progress are from clients in various industries and locations throughout the world. Most contracts require payments as the projects progress or, in certain cases, advance payments. The company generally does not require collateral, but in most cases can place liens against the property, plant or equipment constructed or terminate the contract, if a material default occurs. The company evaluates the counterparty credit risk of third parties as part of its project risk review process and in determining the appropriate level of reserves. The company maintains adequate reserves for potential credit losses and generally such losses have been minimal and within management's estimates.
	Cash and marketable securities are deposited with major banks throughout the world. Such deposits are placed with high quality institutions and the amounts invested in any single institution are limited to the extent possible in order to minimize concentration of counterparty credit risk.
	The company's counterparties for derivative contracts are large financial institutions selected based on profitability, strength of balance sheet, credit ratings and capacity for timely payment of financial commitments. There are no significant concentrations of credit risk with any individual counterparty related to our derivative contracts.
	The company monitors the credit quality of its counterparties and has not incurred any significant credit risk losses related to its deposits or derivative contracts.
Stock-Based Plans	Stock-Based Plans
	The company applies the provisions of ASC 718, "Compensation — Stock Compensation," in its accounting and reporting for stock-based compensation. ASC 718 requires all stock-based payments to employees, including grants of employee stock options, to be recognized in the income statement based on their fair values. All unvested options outstanding under the company's option plans have grant prices equal to the market price of the company's stock on the dates of grant. Compensation cost for restricted stock and restricted stock units is determined based on the fair market value of the company's stock at the date of grant. Compensation cost for stock appreciation rights is determined based on the change in the fair market value of the company's stock during the period. Stock-based compensation expense is generally recognized over the required service period, or over a shorter period when employee retirement eligibility is a factor. Certain awards that may be settled in cash or company stock are classified as liabilities and remeasured at fair value at the end of each reporting period until the awards are settled.
Other Comprehensive Income (Loss)	Other Comprehensive Income (Loss)
	ASC 220, "Comprehensive Income," establishes standards for reporting and displaying comprehensive income and its components in the consolidated financial statements. The company reports the cumulative foreign currency translation adjustments, unrealized gains and losses on available-for-sale securities and derivative contracts, ownership share of equity method investees' other comprehensive income (loss), and adjustments related to defined benefit pension and postretirement plans, as components of accumulated other comprehensive income (loss).
	The tax effects of the components of other comprehensive income (loss) are as follows:
			Year Ended December 31,
			2014									2013									2012
	(in thousands)		Before-Tax			Tax			Net-of-Tax			Before-Tax			Tax			Net-of-Tax			Before-Tax			Tax			Net-of-Tax
			Amount			(Expense)			Amount			Amount			(Expense)			Amount			Amount			(Expense)			Amount
						Benefit									Benefit									Benefit
	Other comprehensive income (loss):
	Foreign currency translation adjustment		$	(197,361	)	$	71,552		$	(125,809	)	$	(74,538	)	$	27,637		$	(46,901	)	$	47,780		$	(18,077	)	$	29,703
	Ownership share of equity method investees' other comprehensive income			5,892			(4,054	)		1,838			13,117			(2,372	)		10,745			1,487			(924	)		563
	Defined benefit pension and postretirement plan adjustments			(106,957	)		40,109			(66,848	)		(8,917	)		3,344			(5,573	)		(145,848	)		54,693			(91,155	)
	Unrealized gain (loss) on derivative contracts			(2,837	)		773			(2,064	)		2,171			(787	)		1,384			2,369			(1,071	)		1,298
	Unrealized gain (loss) on available-for-sale securities			(700	)		263			(437	)		(1,244	)		466			(778	)		135			(50	)		85
	Total other comprehensive loss			(301,963	)		108,643			(193,320	)		(69,411	)		28,288			(41,123	)		(94,077	)		34,571			(59,506	)
	Less: Other comprehensive loss attributable to noncontrolling interests			(7,309	)		—			(7,309	)		(772	)		—			(772	)		(948	)		—			(948	)
	Other comprehensive loss attributable to Fluor Corporation		$	(294,654	)	$	108,643		$	(186,011	)	$	(68,639	)	$	28,288		$	(40,351	)	$	(93,129	)	$	34,571		$	(58,558	)
	In the first quarter of 2013, the company adopted Accounting Standards Update ("ASU") 2013-02, "Reporting of Amounts Reclassified Out of Accumulated Other Comprehensive Income," which requires an entity to disclose additional information about reclassification adjustments, including (a) changes in AOCI balances by component and (b) significant items reclassified out of AOCI.
	The changes in AOCI balances by component (after-tax) for the year ended December 31, 2014 are as follows:
	(in thousands)		Foreign			Ownership			Defined			Unrealized			Unrealized			Accumulated
			Currency			Share of			Benefit			Gain (Loss)			Gain (Loss)			Other
			Translation			Equity Method			Pension and			on Derivative			on Available-			Comprehensive
						Investees' Other			Postretirement			Contracts			for-Sale			Income
						Comprehensive			Plans						Securities			(Loss), Net
						Income (Loss)
	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			(119,252	)		(7,958	)		(74,924	)		(2,151	)		(349	)		(204,634	)
	Amount reclassified from AOCI			—			9,796			8,076			839			(88	)		18,623
	Net other comprehensive income (loss)			(119,252	)		1,838			(66,848	)		(1,312	)		(437	)		(186,011	)
	Balance as of December 31, 2014		$	(119,416	)	$	(30,436	)	$	(325,145	)	$	(8,954	)	$	(261	)	$	(484,212	)
	Attributable to Noncontrolling Interests:
	Balance as of December 31, 2013		$	7,885		$	—		$	—		$	67		$	—		$	7,952
	Other comprehensive loss before reclassifications			(6,557	)		—			—			(795	)		—			(7,352	)
	Amount reclassified from AOCI			—			—			—			43						43
	Net other comprehensive loss			(6,557	)		—			—			(752	)		—			(7,309	)
	Balance as of December 31, 2014		$	1,328		$	—		$	—		$	(685	)	$	—		$	643
	The changes in AOCI balances by component (after-tax) for the year ended December 31, 2013 are as follows:
	(in thousands)		Foreign			Ownership			Defined			Unrealized			Unrealized			Accumulated
			Currency			Share of			Benefit			Gain (Loss)			Gain (Loss)			Other
			Translation			Equity Method			Pension and			on Derivative			on Available-			Comprehensive
						Investees' Other			Postretirement			Contracts			for-Sale			Income
						Comprehensive			Plans						Securities			(Loss), Net
						Income (Loss)
	Attributable to Fluor Corporation:
	Balance as of December 31, 2012		$	45,899		$	(43,019	)	$	(252,724	)	$	(8,960	)	$	954		$	(257,850	)
	Other comprehensive income (loss) before reclassifications			(46,063	)		10,745			(13,655	)		(2,536	)		(652	)		(52,161	)
	Amount reclassified from AOCI			—			—			8,082			3,854			(126	)		11,810
	Net other comprehensive income (loss)			(46,063	)		10,745			(5,573	)		1,318			(778	)		(40,351	)
	Balance as of December 31, 2013		$	(164	)	$	(32,274	)	$	(258,297	)	$	(7,642	)	$	176		$	(298,201	)
	Attributable to Noncontrolling Interests:
	Balance as of December 31, 2012		$	8,723		$	—		$	—		$	1		$	—		$	8,724
	Other comprehensive income (loss) before reclassifications			(838	)		—			—			62			—			(776	)
	Amount reclassified from AOCI			—			—			—			4						4
	Net other comprehensive income (loss)			(838	)		—			—			66			—			(772	)
	Balance as of December 31, 2013		$	7,885		$	—		$	—		$	67		$	—		$	7,952
	The changes in AOCI balances by component (after-tax) attributable to Fluor Corporation for the year ended December 31, 2012 are as follows:
	(in thousands)		Foreign			Ownership			Defined			Unrealized			Unrealized			Accumulated
			Currency			Share of Equity			Benefit			Gain (Loss)			Gain on			Other
			Translation			Method			Pension and			on Derivative			Available-			Comprehensive
						Investees' Other			Postretirement			Contracts			for-Sale			Loss, Net
						Comprehensive			Plans						Securities
						Income (Loss)
	Balance as of December 31, 2011			15,770			(43,582			(161,569			(10,780			869			(199,292
$			$			)		$	)		$	)		$	$			)
Current-period other comprehensive income (loss)			30,129			563			(91,155	)		1,820			85			(58,558	)
Balance as of December 31, 2012		$	45,899		$	(43,019	)	$	(252,724	)	$	(8,960	)	$	954		$	(257,850	)
During 2014 and 2013, functional currency exchange rates for most of the company's international operations weakened against the U.S. dollar, resulting in unrealized translation losses. During 2012, functional currency exchange rates for most of the company's international operations strengthened against the U.S. dollar, resulting in unrealized translation gains.
The significant items reclassified out of AOCI and the corresponding location and impact on the Consolidated Statement of Earnings are as follows:
				Year Ended
		Location in Consolidated		December 31,
(in thousands)		Statements of Earnings		2014			2013
Component of AOCI:
Ownership share of equity method investees' other comprehensive loss		Total cost of revenue		$	(15,662	)	$	—
Income tax benefit		Income tax expense			5,866			—
Net of tax				$	(9,796	)	$	—
Defined benefit pension plan adjustments		Various accounts(1)			(12,922			(12,931
				$		)	$		)
Income tax benefit		Income tax expense			4,846			4,849
Net of tax				$	(8,076	)	$	(8,082	)
Unrealized gain (loss) on derivative contracts:
Commodity and foreign currency contracts		Total cost of revenue		$	255		$	(4,502	)
Interest rate contracts		Interest expense			(1,678	)		(1,678	)
Income tax benefit (net)		Income tax expense			541			2,322
Net of tax:					(882	)		(3,858	)
Less: Noncontrolling interests		Net earnings attributable to noncontrolling interests			(43	)		(4	)
Net of tax and noncontrolling interests				$	(839	)	$	(3,854	)
Unrealized gain on available-for-sale securities		Corporate general and administrative expense		$	140		$	202
Income tax expense		Income tax expense			(52	)		(76	)
Net of tax				$	88		$	126
-1	Defined benefit pension plan adjustments were reclassified primarily to total cost of revenue and corporate general and administrative expense.
Recent Accounting Pronouncements	Recent Accounting Pronouncements
	In January 2015, the Financial Accounting Standards Board ("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 June 2014, the FASB issued 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. This ASU is effective for interim and annual reporting periods beginning after December 15, 2014. Management does not expect the adoption of ASU 2014-11 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 revenue 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 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.
	In April 2014, the FASB issued 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. This ASU is effective prospectively for all disposals or classifications as held for sale that occur in interim and annual reporting periods beginning after December 15, 2014. Management does not expect the adoption of ASU 2014-08 to have a material impact on the company's financial position, results of operations or cash flows.
	In January 2014, the FASB issued 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. This ASU is effective for interim and annual reporting periods beginning after December 15, 2014. Management does not expect the adoption of ASU 2014-05 to have a material impact on the company's financial position, results of operations or cash flows.
	In the first quarter of 2014, the company adopted ASU 2013-11, "Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists." This ASU clarifies the financial statement presentation of unrecognized tax benefits in certain circumstances. The adoption of ASU 2013-11 did not have an impact on the company's financial position, results of operations or cash flows.
	In the first quarter of 2014, the company adopted ASU 2013-07, "Liquidation Basis of Accounting," which clarifies when an entity should apply the liquidation basis of accounting. In addition, ASU 2013-07 provides principles for the recognition and measurement of assets and liabilities and requirements for financial statements prepared using the liquidation basis of accounting. The adoption of ASU 2013-07 did not have an impact on the company's financial position, results of operations or cash flows.
	In the first quarter of 2014, the company adopted ASU 2013-05, "Parent's Accounting for the Cumulative Translation Adjustment upon Derecognition of Certain Subsidiaries or Groups of Assets within a Foreign Entity or of an Investment in a Foreign Entity." The objective of ASU 2013-05 is to resolve a practice diversity in circumstances where reporting entities release cumulative translation adjustments into net income when a parent either sells a part or all of its investment in a foreign entity, or no longer holds a controlling financial interest in a subsidiary or group of assets that is a nonprofit activity or a business (other than a sale of in substance real estate or conveyance of oil and gas mineral rights) within a foreign entity. The adoption of ASU 2013-05 did not have an impact on the company's financial position, results of operations or cash flows.
	In the first quarter of 2014, the company adopted ASU 2013-04, "Obligations Resulting from Joint and Several Liability Arrangements for Which the Total Amount of the Obligation Is Fixed at the Reporting Date," which addresses the recognition, measurement and disclosure of certain obligations including debt arrangements, other contractual obligations and settled litigation and judicial rulings. The adoption of ASU 2013-04 did not have an impact on the company's financial position, results of operations or cash flows.

Major_Accounting_Policies_Tabl

Major Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2014
Major Accounting Policies
Schedule of property, plant and equipment and ranges of estimated useful service lives
		December 31,						Estimated
								Useful
								Service
	(cost in thousands)		2014			2013		Lives
	Buildings			281,852			282,842
			$			$				20 – 40
	Building and leasehold improvements			172,789			175,740			6 – 20
	Machinery and equipment			1,305,623			1,328,434			2 – 10
	Furniture and fixtures			142,961			146,498			2 – 10
Schedule of tax effects of components of other comprehensive income (loss)
			Year Ended December 31,
			2014									2013									2012
	(in thousands)		Before-Tax			Tax			Net-of-Tax			Before-Tax			Tax			Net-of-Tax			Before-Tax			Tax			Net-of-Tax
			Amount			(Expense)			Amount			Amount			(Expense)			Amount			Amount			(Expense)			Amount
						Benefit									Benefit									Benefit
	Other comprehensive income (loss):
	Foreign currency translation adjustment		$	(197,361	)	$	71,552		$	(125,809	)	$	(74,538	)	$	27,637		$	(46,901	)	$	47,780		$	(18,077	)	$	29,703
	Ownership share of equity method investees' other comprehensive income			5,892			(4,054	)		1,838			13,117			(2,372	)		10,745			1,487			(924	)		563
	Defined benefit pension and postretirement plan adjustments			(106,957	)		40,109			(66,848	)		(8,917	)		3,344			(5,573	)		(145,848	)		54,693			(91,155	)
	Unrealized gain (loss) on derivative contracts			(2,837	)		773			(2,064	)		2,171			(787	)		1,384			2,369			(1,071	)		1,298
	Unrealized gain (loss) on available-for-sale securities			(700	)		263			(437	)		(1,244	)		466			(778	)		135			(50	)		85
	Total other comprehensive loss			(301,963	)		108,643			(193,320	)		(69,411	)		28,288			(41,123	)		(94,077	)		34,571			(59,506	)
	Less: Other comprehensive loss attributable to noncontrolling interests			(7,309	)		—			(7,309	)		(772	)		—			(772	)		(948	)		—			(948	)
	Other comprehensive loss attributable to Fluor Corporation		$	(294,654	)	$	108,643		$	(186,011	)	$	(68,639	)	$	28,288		$	(40,351	)	$	(93,129	)	$	34,571		$	(58,558	)
Schedule of changes in AOCI balances by component (after-tax)
	(in thousands)		Foreign			Ownership			Defined			Unrealized			Unrealized			Accumulated
			Currency			Share of			Benefit			Gain (Loss)			Gain (Loss)			Other
			Translation			Equity Method			Pension and			on Derivative			on Available-			Comprehensive
						Investees' Other			Postretirement			Contracts			for-Sale			Income
						Comprehensive			Plans						Securities			(Loss), Net
						Income (Loss)
	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			(119,252	)		(7,958	)		(74,924	)		(2,151	)		(349	)		(204,634	)
	Amount reclassified from AOCI			—			9,796			8,076			839			(88	)		18,623
	Net other comprehensive income (loss)			(119,252	)		1,838			(66,848	)		(1,312	)		(437	)		(186,011	)
	Balance as of December 31, 2014		$	(119,416	)	$	(30,436	)	$	(325,145	)	$	(8,954	)	$	(261	)	$	(484,212	)
	Attributable to Noncontrolling Interests:
	Balance as of December 31, 2013		$	7,885		$	—		$	—		$	67		$	—		$	7,952
	Other comprehensive loss before reclassifications			(6,557	)		—			—			(795	)		—			(7,352	)
	Amount reclassified from AOCI			—			—			—			43						43
	Net other comprehensive loss			(6,557	)		—			—			(752	)		—			(7,309	)
	Balance as of December 31, 2014		$	1,328		$	—		$	—		$	(685	)	$	—		$	643
	(in thousands)		Foreign			Ownership			Defined			Unrealized			Unrealized			Accumulated
			Currency			Share of			Benefit			Gain (Loss)			Gain (Loss)			Other
			Translation			Equity Method			Pension and			on Derivative			on Available-			Comprehensive
						Investees' Other			Postretirement			Contracts			for-Sale			Income
						Comprehensive			Plans						Securities			(Loss), Net
						Income (Loss)
	Attributable to Fluor Corporation:
	Balance as of December 31, 2012		$	45,899		$	(43,019	)	$	(252,724	)	$	(8,960	)	$	954		$	(257,850	)
	Other comprehensive income (loss) before reclassifications			(46,063	)		10,745			(13,655	)		(2,536	)		(652	)		(52,161	)
	Amount reclassified from AOCI			—			—			8,082			3,854			(126	)		11,810
	Net other comprehensive income (loss)			(46,063	)		10,745			(5,573	)		1,318			(778	)		(40,351	)
	Balance as of December 31, 2013		$	(164	)	$	(32,274	)	$	(258,297	)	$	(7,642	)	$	176		$	(298,201	)
	Attributable to Noncontrolling Interests:
	Balance as of December 31, 2012		$	8,723		$	—		$	—		$	1		$	—		$	8,724
	Other comprehensive income (loss) before reclassifications			(838	)		—			—			62			—			(776	)
	Amount reclassified from AOCI			—			—			—			4						4
	Net other comprehensive income (loss)			(838	)		—			—			66			—			(772	)
	Balance as of December 31, 2013		$	7,885		$	—		$	—		$	67		$	—		$	7,952
	(in thousands)		Foreign			Ownership			Defined			Unrealized			Unrealized			Accumulated
			Currency			Share of Equity			Benefit			Gain (Loss)			Gain on			Other
			Translation			Method			Pension and			on Derivative			Available-			Comprehensive
						Investees' Other			Postretirement			Contracts			for-Sale			Loss, Net
						Comprehensive			Plans						Securities
						Income (Loss)
	Balance as of December 31, 2011			15,770			(43,582			(161,569			(10,780			869			(199,292
			$			$		)	$		)	$		)	$			$		)
	Current-period other comprehensive income (loss)			30,129			563			(91,155	)		1,820			85			(58,558	)
	Balance as of December 31, 2012		$	45,899		$	(43,019	)	$	(252,724	)	$	(8,960	)	$	954		$	(257,850	)
Schedule of significant items reclassified out of AOCI and corresponding location and impact on Consolidated Statement of Earnings
					Year Ended
			Location in Consolidated		December 31,
	(in thousands)		Statements of Earnings		2014			2013
	Component of AOCI:
	Ownership share of equity method investees' other comprehensive loss		Total cost of revenue		$	(15,662	)	$	—
	Income tax benefit		Income tax expense			5,866			—
	Net of tax				$	(9,796	)	$	—
	Defined benefit pension plan adjustments		Various accounts(1)			(12,922			(12,931
					$		)	$		)
	Income tax benefit		Income tax expense			4,846			4,849
	Net of tax				$	(8,076	)	$	(8,082	)
	Unrealized gain (loss) on derivative contracts:
	Commodity and foreign currency contracts		Total cost of revenue		$	255		$	(4,502	)
	Interest rate contracts		Interest expense			(1,678	)		(1,678	)
	Income tax benefit (net)		Income tax expense			541			2,322
	Net of tax:					(882	)		(3,858	)
	Less: Noncontrolling interests		Net earnings attributable to noncontrolling interests			(43	)		(4	)
	Net of tax and noncontrolling interests				$	(839	)	$	(3,854	)
	Unrealized gain on available-for-sale securities		Corporate general and administrative expense		$	140		$	202
	Income tax expense		Income tax expense			(52	)		(76	)
	Net of tax				$	88		$	126
	-1	Defined benefit pension plan adjustments were reclassified primarily to total cost of revenue and corporate general and administrative expense.

Recovered_Sheet2

Consolidated Statement of Cash Flows (Tables)	12 Months Ended
	Dec. 31, 2014
Consolidated Statement of Cash Flows.
Schedule of changes in operating assets and liabilities and cash paid for interest and income taxes (net of refunds)
		Year Ended December 31,
	(in thousands)	2014			2013			2012
	(Increase) decrease in:
	Accounts and notes receivable, net	$	(336,109	)	$	(98,744	)	$	23,680
	Contract work in progress		50,570			101,158			29,669
	Other current assets		28,482			102,417			(111,311	)
	Other assets		44,580			(26,204	)		(65,418	)
	Increase (decrease) in:
	Trade accounts payable		(153,515	)		(274,418	)		195,147
	Advance billings on contracts		(63,594	)		(29,043	)		(237,497	)
	Accrued liabilities		31,697			(83,613	)		28,993
	Other liabilities		(10,972	)		46,851			(58,773	)
	Decrease in cash due to changes in operating assets and liabilities	$	(408,861	)	$	(261,596	)	$	(195,510	)
	Cash paid during the year for:
	Interest	$	23,509		$	22,585		$	24,244
	Income taxes (net of refunds)		228,471			268,889			294,214

Income_Taxes_Tables

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2014
Income Taxes
Income tax expense (benefit) included in Consolidated Statement of Earnings from continuing operations
		Year Ended December 31,
	(in thousands)	2014			2013			2012
	Current:
	Federal	$	126,490		$	200,608		$	(133,312	)
	Foreign		151,240			168,894			226,110
	State and local		13,001			14,779			(7,804	)
	Total current		290,731			384,281			84,994
	Deferred:
	Federal		74,037			(29,873	)		87,723
	Foreign		(10,353	)		2,054			(16,645	)
	State and local		(1,600	)		(1,889	)		6,366
	Total deferred		62,084			(29,708	)		77,444
	Total income tax expense	$	352,815		$	354,573		$	162,438
Reconciliation of U.S. statutory federal income tax expense to income tax expense
		Year Ended December 31,
	(in thousands)	2014			2013			2012
	U.S. statutory federal tax expense		421,718			412,159			256,727
		$			$			$
	Increase (decrease) in taxes resulting from:
	State and local income taxes		7,670			7,802			1,727
	Other permanent items, net		(9,378	)		(17,517	)		(4,849	)
	Noncontrolling interests		(47,822	)		(54,359	)		(39,600	)
	Foreign losses, net		27,660			(18,568	)		(84,366	)
	Valuation allowance, net		(36,523	)		15,305			85,541
	Statute expirations and tax authority settlements		(19,331	)		—			(13,152	)
	Other changes to unrecognized tax positions		5,574			9,261			(29,740	)
	Other, net		3,247			490			(9,850	)
	Total income tax expense	$	352,815		$	354,573		$	162,438
Tax effects of significant temporary differences giving rise to deferred tax assets and liabilities
		December 31,
	(in thousands)	2014			2013
	Deferred tax assets:
	Accrued liabilities not currently deductible:
	Employee compensation and benefits	$	53,672		$	54,723
	Employee time-off accrual		92,901			94,213
	Project and non-project reserves		27,520			24,753
	Accrual for discontinued operations		110,714			—
	Workers' compensation insurance accruals		13,122			14,400
	Tax basis of investments in excess of book basis		4,264			4,957
	Revenue recognition		36,890			36,180
	Net operating loss carryforward		236,138			266,664
	Unrealized currency loss		4,161			6,817
	Foreign tax credits		—			30,705
	Other comprehensive loss		288,494			179,228
	Other		39,552			21,274
	Total deferred tax assets		907,428			733,914
	Valuation allowance for deferred tax assets		(208,905	)		(245,428	)
	Deferred tax assets, net	$	698,523		$	488,486
	Deferred tax liabilities:
	Book basis of property, equipment and other capital costs in excess of tax basis		(53,750	)		(36,169	)
	Residual U.S. tax on unremitted non-U.S. earnings		(85,669	)		(50,569	)
	Other		(17,877	)		(16,179	)
	Total deferred tax liabilities		(157,296	)		(102,917	)
	Deferred tax assets, net of deferred tax liabilities	$	541,227		$	385,569
Reconciliation of beginning and ending amount of unrecognized tax benefits including interest and penalties
	(in thousands)	2014			2013
	Balance at beginning of year	$	54,054		$	47,043
	Change in tax positions of prior years		6,727			1,015
	Change in tax positions of current year		3,600			7,397
	Reduction in tax positions for statute expirations		(2,275	)		(1,401	)
	Reduction in tax positions for audit settlements		(28,134	)		—
	Balance at end of year	$	33,972		$	54,054
U.S. and foreign earnings from continuing operations before taxes
		Year Ended December 31,
	(in thousands)	2014			2013			2012
	United States	$	332,497		$	303,070		$	279,890
	Foreign		872,412			874,529			453,615
	Total	$	1,204,909		$	1,177,599		$	733,505

Retirement_Benefits_Tables

Retirement Benefits (Tables)	12 Months Ended
	Dec. 31, 2014
Defined Benefit Pension Plans
Defined Benefit Plans and Other Postretirement Benefit Plans
Schedule of components of net periodic pension expense / benefit cost
			U.S. Pension Plan									Non-U.S. Pension Plans
			Year Ended December 31,									Year Ended December 31,
	(in thousands)		2014			2013			2012			2014			2013			2012
	Service cost		$	3,800		$	6,453		$	5,957		$	16,217		$	15,390		$	7,723
	Interest cost			31,675			29,100			33,293			34,536			32,176			32,630
	Expected return on assets			(30,105	)		(30,975	)		(35,322	)		(48,077	)		(46,420	)		(41,949	)
	Amortization of prior service cost/(credits)			750			103			(114	)		—			—			—
	Recognized net actuarial loss			4,435			6,039			4,279			7,738			6,788			1,663
	(Gain on curtailment)/loss on settlement			—			(309	)		—			—			—			—
	Net periodic pension expense		$	10,555		$	10,411		$	8,093		$	10,414		$	7,934		$	67
Schedule of assumptions for determining projected benefit obligation at year end and net periodic cost for year
			U.S. Pension Plan									Non-U.S. Pension Plans
			December 31,									December 31,
			2014			2013			2012			2014			2013			2012
	For determining projected benefit obligation at year-end:
	Discount rates			1.95%			4.95%			4.05%			2.20-5.00%			3.55-5.50%			3.60-6.00%
	Rates of increase in compensation levels			N/A			N/A			N/A			2.25-8.00%			2.25-9.00%			2.25-9.00%
	For determining net periodic cost for the year:
	Discount rates			4.95%			4.05%			5.05%			3.55-5.50%			3.60-6.00%			3.75-6.75%
	Rates of increase in compensation levels			N/A			N/A			N/A			2.25-9.00%			2.25-9.00%			2.25-9.00%
	Expected long-term rates of return on assets			4.55%			4.25%			5.25%			4.75-7.00%			5.00-7.00%			5.00-7.00%
Schedule of target allocations and weighted average actual allocations of plan assets
						U.S. Plan								Non-U.S. Plan
						Assets								Assets
						December 31,								December 31,
			Target Allocation			2014			2013		Target Allocation			2014			2013
	Asset category:
	Debt securities		95% - 100%			93%			94%		65% - 75%			71%			63%
	Equity securities		0% - 5%			2%			5%		20% - 30%			25%			32%
	Other		0% - 5%			5%			1%		0% - 10%			4%			5%
	Total					100%			100%					100%			100%
Schedule of plan assets and liabilities of defined benefit pension plans, measured at fair value on a recurring basis
	U.S. Pension Plan
			December 31, 2014												December 31, 2013
			Fair Value Hierarchy												Fair Value Hierarchy
	(in thousands)		Total			Level 1			Level 2			Level 3			Total			Level 1			Level 2			Level 3
	Assets:
	Equity securities:
	Common stock		$	19		$	19		$	—		$	—		$	—		$	—		$	—		$	—
	Common or collective trusts			—			—			—			—			17,068			—			17,068			—
	Limited Partnerships			12,393			—			—			12,393			17,546			—			—			17,546
	Debt securities:
	Common or collective trusts			698,193			—			698,193			—			202,575			—			202,575			—
	Corporate bonds			—			—			—			—			397,524			—			397,524			—
	Government securities			—			—			—			—			69,562			—			69,562			—
	Other:
	Common or collective trusts — money market funds			40,640			—			40,640			—			3,644			—			3,644			—
	Other assets			—			—			—			—			4,374			—			4,374			—
	Liabilities:
	Foreign currency contracts and other			—			—			—			—			(4,338	)		—			(4,338	)		—
	Plan assets measured at fair value, net		$	751,245		$	19		$	738,833		$	12,393		$	707,955		$	—		$	690,409		$	17,546
	Plan assets not measured at fair value, net			23												775
	Total plan assets, net		$	751,268											$	708,730
	Non-U.S. Pension Plans
			December 31, 2014												December 31, 2013
			Fair Value Hierarchy												Fair Value Hierarchy
	(in thousands)		Total			Level 1			Level 2			Level 3			Total			Level 1			Level 2			Level 3
	Assets:
	Equity securities:
	Common and preferred stock		$	54,890		$	54,890		$	—		$	—		$	71,567		$	71,567		$	—		$	—
	Common or collective trusts			200,701			—			200,701			—			228,608			—			228,608			—
	Debt securities:
	Common or collective trusts			378,569			—			378,569			—			321,086			—			321,086			—
	Corporate bonds			149,152			—			149,152			—			107,658			—			107,658			—
	Government securities			195,305			—			195,305			—			160,586			—			160,586			—
	Other:
	Common or collective trusts			37,092			—			30,441			6,651			48,409			—			40,667			7,742
	Other assets			13,006			—			13,006			—			2,634			—			2,634			—
	Liabilities:
	Foreign currency contracts and other			(11,038	)		—			(11,038	)		—			(3,979	)		—			(3,979	)		—
	Plan assets measured at fair value, net		$	1,017,677		$	54,890		$	956,136		$	6,651		$	936,569		$	71,567		$	857,260		$	7,742
	Plan assets not measured at fair value, net			14,456												9,268
	Total plan assets, net			1,032,133												945,837
			$												$
Reconciliation of beginning and ending balances of fair value measurements using significant unobservable inputs (Level 3)
			U.S. Pension Plan						Non-U.S.
									Pension Plans
	(in thousands)		2014			2013			2014			2013
	Balance at beginning of year		$	17,546		$	17,630		$	7,742		$	7,800
	Actual return on plan assets:
	Assets still held at reporting date			(2,454	)		418			(886	)		(58	)
	Assets sold during the period			124			357			3			—
	Purchases			—			—			—			—
	Sales			(2,823	)		(859	)		(208	)		—
	Settlements			—			—			—			—
	Balance at end of year		$	12,393		$	17,546		$	6,651		$	7,742
Schedule of expected benefit payments for U.S and non-U.S defined benefit pension plans
	(in thousands)		U.S.			Non-U.S.
			Pension Plan			Pension Plans
	Year Ended December 31,
	2015		$	820,586	-1	$	26,497
	2016			—			27,250
	2017			—			28,914
	2018			—			29,443
	2019			—			31,706
	2020 — 2024			—			177,582
	-1	The majority of the benefit payments for the U.S. plan are expected to occur at settlement and to be funded from plan assets, which totaled $751 million as of December 31, 2014.
Schedule of change in projected benefit obligation, plan assets and funded status of U.S and non-U.S plans
			U.S. Pension Plan						Non-U.S. Pension Plans
			December 31,						December 31,
	(in thousands)		2014			2013			2014			2013
	Change in projected benefit obligation
	Benefit obligation at beginning of year		$	686,977		$	756,976		$	908,530		$	826,466
	Service cost			3,800			6,453			16,217			15,390
	Interest cost			31,675			29,100			34,536			32,176
	Employee contributions			—			—			4,448			3,832
	Currency translation			—			—			(110,188	)		25,885
	Actuarial (gain) loss			146,643			(59,990	)		196,021			29,510
	Plan amendments			2,236			6,367			(17,921	)		—
	Benefits paid			(52,199	)		(48,204	)		(26,505	)		(24,729	)
	Curtailments			—			—			—			—
	Other			(3,764	)		(3,725	)		—			—
	Projected benefit obligation at end of year			815,368			686,977			1,005,138			908,530
	Change in plan assets
	Plan assets at beginning of year			708,730			767,296			945,837			886,141
	Actual return on plan assets			62,501			(6,637	)		191,929			40,508
	Company contributions			36,000			—			26,816			13,133
	Employee contributions			—			—			4,448			3,832
	Currency translation			—			—			(110,392	)		26,952
	Benefits paid			(52,199	)		(48,204	)		(26,505	)		(24,729	)
	Other			(3,764	)		(3,725	)		—			—
	Plan assets at end of year			751,268			708,730			1,032,133			945,837
	(Under)/overfunded amounts		$	(64,100	)	$	21,753		$	26,995		$	37,307
Schedule of amounts recognized in Consolidated Balance Sheet
	Amounts recognized in the Consolidated Balance Sheet
	Pension assets included in other assets		$	—		$	21,753		$	82,820		$	58,849
	Pension liabilities included in noncurrent liabilities			(64,100	)		—			(55,825	)		(21,542	)
	Accumulated other comprehensive loss (pre-tax)		$	273,832		$	162,534		$	250,399		$	252,995
Postretirement Benefit
Defined Benefit Plans and Other Postretirement Benefit Plans
Schedule of components of net periodic pension expense / benefit cost
			Year Ended December 31,
	(in thousands)		2014			2013			2012
	Service cost		$	—		$	—		$	—
	Interest cost			388			351			592
	Expected return on assets			—			—			—
	Amortization of prior service cost			—			—			—
	Recognized net actuarial loss			151			341			640
	Net periodic postretirement benefit cost		$	539		$	692		$	1,232
Schedule of change in accumulated postretirement benefit obligation
			Year Ended
			December 31,
	(in thousands)		2014			2013
	Change in accumulated postretirement benefit obligation
	Benefit obligation at beginning of year		$	12,629		$	14,512
	Service cost			—			—
	Interest cost			388			351
	Employee contributions			356			421
	Actuarial (gain) loss			(252	)		(596	)
	Benefits paid			(1,811	)		(2,059	)
	Benefit obligation at end of year		$	11,310		$	12,629
	Funded status		$	(11,310	)	$	(12,629	)

Fair_Value_of_Financial_Instru1

Fair Value of Financial Instruments (Tables)	12 Months Ended
	Dec. 31, 2014
Fair Value of Financial Instruments
Schedule of assets and liabilities measured at fair value on a recurring basis
			December 31, 2014												December 31, 2013
			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)		$	14,419		$	14,419		$	—		$	—		$	50,081	$	50,081	$	—	$	—
	Marketable securities, current(2)			80,706			—			80,706			—			111,333		—		111,333		—
	Deferred compensation trusts(3)			94,893			94,893			—			—			87,507		87,507		—		—
	Marketable securities, noncurrent(4)			343,644			—			343,644			—			275,402		—		275,402		—
	Derivative assets(5)
	Commodity contracts			561			—			561			—			438		—		438		—
	Foreign currency contracts			180			—			180			—			855		—		855		—
	Liabilities:
	Derivative liabilities(5)
	Commodity contracts		$	2,290		$	—		$	2,290		$	—		$	3	$	—	$	3	$	—
	Foreign currency contracts			4,392			—			4,392			—			967		—		967		—
	-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, corporate debt securities and commercial paper 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 "7. Derivatives and Hedging" for the classification of commodity and foreign currency contracts in the 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 Consolidated Balance Sheet
					December 31, 2014						December 31, 2013
			Fair Value
	(in thousands)		Hierarchy		Carrying Value			Fair Value			Carrying Value			Fair Value
	Assets:
	Cash(1)		Level 1		$	1,224,834		$	1,224,834		$	1,444,656		$	1,444,656
	Cash equivalents(2)		Level 2			753,872			753,872			788,845			788,845
	Marketable securities, current(3)		Level 2			24,425			24,425			74,690			74,690
	Notes receivable, including noncurrent portion(4)		Level 3			19,284			19,284			27,602			27,602
	Liabilities:
	3.375% Senior Notes(5)		Level 2		$	497,045		$	510,465		$	496,604		$	484,204
	3.5% Senior Notes(5)		Level 2			494,640			498,914			—			—
	1.5% Convertible Senior Notes(5)		Level 2			18,324			40,826			18,398			54,027
	Other borrowings(6)		Level 2			10,418			10,418			11,441			11,441
	-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 carry 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)	12 Months Ended
	Dec. 31, 2014
Derivatives and Hedging
Schedule of fair values of derivatives designated as hedging instruments under ASC 815
		Asset Derivatives								Liability Derivatives
	(in thousands)	Balance Sheet		December 31,			December 31,			Balance Sheet		December 31,			December 31,
		Location		2014			2013			Location		2014			2013
	Commodity contracts	Other current assets		$	365		$	296		Other accrued liabilities		$	1,362		$	3
	Foreign currency contracts	Other current assets			128			855		Other accrued liabilities			3,721			967
	Commodity contracts	Other assets			196			142		Noncurrent liabilities			928			—
	Foreign currency contracts	Other assets			52			—		Noncurrent liabilities			671			—
	Total			$	741		$	1,293				$	6,682		$	970
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
	Cash Flow Hedges (in thousands)	2014			2013			2012			Location of Gain (Loss)		2014			2013			2012
	Commodity contracts	$	(881	)	$	265		$	1,138		Total cost of revenue		$	(59	)	$	50		$	1,859
	Foreign currency contracts		(1,270	)		(2,801	)		2,933		Total cost of revenue			269			(2,855	)		1,441
	Interest rate contracts		—			—			—		Interest expense			(1,049	)		(1,049	)		(1,049	)
	Total	$	(2,151	)	$	(2,536	)	$	4,071				$	(839	)	$	(3,854	)	$	2,251
Hedging instruments designated as fair value hedges
Derivative gain (loss)
Schedule of pre-tax amount of gain (loss) recognized in earnings
	Fair Value Hedges (in thousands)	Location of Gain (Loss)		2014			2013			2012
	Foreign currency contracts	Corporate general and administrative expense		$	(3,322	)	$	2,885		$	(14,236	)

Financing_Arrangements_Tables

Financing Arrangements (Tables)	12 Months Ended
	Dec. 31, 2014
Financing Arrangements
Consolidated debt
		December 31,
	(in thousands)	2014		2013
	Current:
	1.5% Convertible Senior Notes	$	18,324	$	18,398
	Other borrowings		10,418		11,441
	Long-Term:
	3.375% Senior Notes	$	497,045	$	496,604
	3.5% Senior Notes		494,640		—
Schedule of liability and equity components of 2004 Notes
		December 31,
	(in thousands)	2014		2013
	Carrying value of the equity component	$	19,516	$	19,519
	Principal amount and carrying value of the liability component		18,324		18,398

StockBased_Plans_Tables

Stock-Based Plans (Tables)	12 Months Ended
	Dec. 31, 2014
Stock-Based Plans
Summary of restricted stock, restricted stock unit and stock option activity
		Restricted Stock or						Stock Options
		Restricted Stock Units
		Number			Weighted			Number			Weighted
					Average						Average
					Grant Date						Exercise Price
					Fair Value						Per Share
					Per Share
	Outstanding as of December 31, 2011		1,294,615		$	44.33			2,899,501		$	50
	Granted		450,668			61.7			688,380			62.18
	Expired or canceled		(17,109	)		58.35			(45,164	)		61.57
	Vested/exercised		(657,998	)		43.46			(309,692	)		37.41
	Outstanding as of December 31, 2012		1,070,176		$	51.96			3,233,025		$	53.64
	Granted		482,959			61.62			884,574			61.45
	Expired or canceled		(11,104	)		62.35			(15,607	)		65.46
	Vested/exercised		(564,265	)		50.65			(1,137,285	)		46.53
	Outstanding as of December 31, 2013		977,766		$	57.36			2,964,707		$	58.63
	Granted		370,014			79.06			684,486			79.19
	Expired or canceled		(30,032	)		69.17			(58,215	)		73.33
	Vested/exercised		(449,227	)		57.08			(417,970	)		57.67
	Outstanding as of December 31, 2014		868,521			66.35			3,173,008			62.92
					$						$
	Options exercisable as of December 31, 2014								1,728,445			57.38
											$
	Remaining unvested options outstanding and expected to vest								1,401,226			69.55
											$
Schedule of fair value on grant date and significant assumptions used in Black-Scholes option-pricing model
		December 31,
		2014			2013
	Weighted average grant date fair value	$	23.04		$	17.22
	Expected life of options (in years)		5.8			4.5
	Risk-free interest rate		1.8	%		0.8	%
	Expected volatility		31.6	%		35.8	%
	Expected annual dividend per share	$	0.84		$	0.64
Summary of information related to options outstanding
	Information related to options outstanding as of December 31, 2014 is summarized below:
		Options Outstanding									Options Exercisable
	Range of Exercise Prices	Number			Weighted			Weighted			Number		Weighted		Weighted
		Outstanding			Average			Average			Exercisable		Average		Average
					Remaining			Exercise Price					Remaining		Exercise Price
					Contractual			Per Share					Contractual		Per Share
					Life (In Years)								Life (In Years)
	$30.46 - $41.77		176,161			4.2		$	30.46			176,161		4.2	$	30.46
	$42.11 - $62.50		1,713,173			6.8			57.50			919,859		6.0		53.93
	$68.36 - $80.12		1,283,674			7.1			74.61			632,425		5.1		69.90
			3,173,008			6.8		$	62.92			1,728,445		5.4	$	57.38

Earnings_Per_Share_Tables

Earnings Per Share (Tables)	12 Months Ended
	Dec. 31, 2014
Earnings Per Share
Schedule of calculations of basic and diluted EPS
		Year Ended December 31,
	(in thousands, except per share amounts)	2014			2013		2012
	Amounts attributable to Fluor Corporation:
	Earnings from continuing operations	$	715,460		$	667,711	$	456,330
	Loss from discontinued operations, net of taxes		(204,551	)		—		—
	Net earnings	$	510,909		$	667,711	$	456,330
	Basic EPS attributable to Fluor Corporation:
	Weighted average common shares outstanding		157,487			162,566		167,121
	Earnings from continuing operations		4.54			4.11		2.73
		$			$		$
	Loss from discontinued operations, net of taxes		(1.30	)		—		—
	Net earnings	$	3.24		$	4.11	$	2.73
	Diluted EPS attributable to Fluor Corporation:
	Weighted average common shares outstanding		157,487			162,566		167,121
	Diluted effect:
	Employee stock options, restricted stock units and shares and VDI units		1,719			1,383		1,024
	Conversion equivalent of dilutive convertible debt		410			405		346
	Weighted average diluted shares outstanding		159,616			164,354		168,491
	Earnings from continuing operations		4.48			4.06		2.71
		$			$		$
	Loss from discontinued operations, net of taxes		(1.28	)		—		—
	Net earnings	$	3.2		$	4.06	$	2.71
	Anti-dilutive securities not included above		769			1,436		1,557

Lease_Obligations_Tables

Lease Obligations (Tables)	12 Months Ended
	Dec. 31, 2014
Lease Obligations
Obligations for minimum rentals under non-cancelable operating leases
	Year Ended December 31,	(in thousands)
	2015	$	48,800
	2016		47,100
	2017		38,400
	2018		28,600
	2019		23,200
	Thereafter		49,600

Operations_by_Business_Segment1

Operations by Business Segment and Geographic Area (Tables)	12 Months Ended
	Dec. 31, 2014
Operations by Business Segment and Geographical Area
Operating Information by Segment
	Operating Information by Segment
		Year Ended December 31,
	(in millions)	2014			2013			2012
	External revenue
	Oil & Gas	$	11,368.90		$	11,519.80		$	9,513.90
	Industrial & Infrastructure		6,061.70			11,081.70			13,237.80
	Government		2,511.90			2,749.10			3,304.70
	Global Services		585			611.8			679.6
	Power		1,004.10			1,389.20			841.1
	Total external revenue	$	21,531.60		$	27,351.60		$	27,577.10
	Segment profit (loss)
	Oil & Gas	$	673.4		$	441.1		$	334.7
	Industrial & Infrastructure		391.2			476			176.5
	Government		92.7			161.4			149.7
	Global Services		73.8			119.7			125.4
	Power		31.3			11.7			(16.9	)
	Total segment profit	$	1,262.40		$	1,209.90		$	769.4
	Depreciation and amortization of fixed assets
	Oil & Gas	$	—		$	—		$	—
	Industrial & Infrastructure		2.6			1.5			2.4
	Government		5.4			9.5			12.9
	Global Services		111.8			117.7			124.6
	Power		1.6			1.1			0.9
	Corporate and other		70.3			76.5			69.6
	Total depreciation and amortization of fixed assets	$	191.7		$	206.3		$	210.4
	Capital expenditures
	Oil & Gas	$	—		$	—		$	—
	Industrial & Infrastructure		8.3			2.9			0.5
	Government		2.2			4.1			5.7
	Global Services		224			145.3			184.5
	Power		2.1			1.3			3.6
	Corporate and other		88.1			134.9			60.4
	Total capital expenditures	$	324.7		$	288.5		$	254.7
	Total assets
	Oil & Gas	$	1,708.20		$	1,643.80
	Industrial & Infrastructure		871.9			909.7
	Government		540.1			580.6
	Global Services		795.3			758.9
	Power		178.6			154.9
	Corporate and other		4,100.30			4,276.00
	Total assets	$	8,194.40		$	8,323.90
	Goodwill
	Oil & Gas	$	7.1		$	7.1
	Industrial & Infrastructure		16.9			18.6
	Government		58			57.5
	Global Services		20.4			20.3
	Power		10.6			10.6
	Total goodwill	$	113		$	114.1
Reconciliation of Segment Information to Consolidated Amounts
		Year Ended December 31,
	(in millions)	2014			2013			2012
	Total segment profit		1,262.40			1,209.90			769.4
		$			$			$
	Corporate general and administrative expense		(182.7	)		(175.1	)		(151.0	)
	Interest expense, net		(11.4	)		(12.5	)		(0.5	)
	Earnings attributable to noncontrolling interests		136.6			155.3			115.6
	Earnings from continuing operations before taxes	$	1,204.90		$	1,177.60		$	733.5
Operating Information by Geographic Area
		External Revenue									Total Assets
		Year Ended December 31,									As of December 31,
	(in millions)	2014			2013			2012			2014		2013
	United States		7,466.2			7,295.0			7,021.4			4,598.4		4,329.4
		$			$			$			$		$
	Canada		4,133.3			6,275.8			5,371.9			900.4		927.8
	Asia Pacific (includes Australia)		2,568.0			4,503.4			6,349.7			724.7		791.4
	Europe		2,070.1			2,096.3			1,632.9			1,178.0		1,150.4
	Central and South America		2,494.8			3,509.7			3,526.5			371.7		657.8
	Middle East and Africa		2,799.2			3,671.4			3,674.7			421.2		467.1
	Total	$	21,531.6		$	27,351.6		$	27,577.1		$	8,194.4	$	8,323.9

Quarterly_Financial_Data_Unaud1

Quarterly Financial Data (Unaudited) (Tables)	12 Months Ended
	Dec. 31, 2014
Quarterly Financial Data (Unaudited)
Summary of quarterly results of operations
	(in millions, except per share amounts)	First Quarter		Second Quarter			Third Quarter			Fourth Quarter
	Year ended December 31, 2014
	Revenue	$	5,384.60	$	5,251.70		$	5,440.10		$	5,455.20
	Cost of revenue		5,072.30		4,906.40			5,060.00			5,093.80
	Earnings from continuing operations before taxes		271.5		285.3			343.4			304.7
	Earnings from continuing operations		193.3		195.2			228.7			234.9
	Loss from discontinued operations, net of taxes		—		(85.2	)		(113.8	)		(5.6	)
	Net earnings		193.3		110			114.9			229.3
	Net earnings attributable to Fluor Corporation		149.1		77.8			69.5			214.5
	Basic earnings (loss) per share attributable to Fluor Corporation:
	Earnings from continuing operations	$	0.93	$	1.03		$	1.17		$	1.43
	Loss from discontinued operations, net of taxes		—		(0.54	)		(0.73	)		(0.04	)
	Net earnings		0.93		0.49			0.44			1.39
	Diluted earnings (loss) per share attributable to Fluor Corporation:
	Earnings from continuing operations		0.92		1.02			1.15			1.41
	Loss from discontinued operations, net of taxes		—		(0.54	)		(0.71	)		(0.04	)
	Net earnings		0.92		0.48			0.44			1.37
	Year ended December 31, 2013
	Revenue	$	7,185.60	$	7,190.30		$	6,684.20		$	6,291.50
	Cost of revenue		6,843.80		6,857.50			6,329.70			5,955.40
	Earnings from continuing operations before taxes		306.3		298.7			304.7			267.9
	Earnings from continuing operations		213.3		207.3			217.4			185
	Loss from discontinued operations, net of taxes		—		—			—			—
	Net earnings		213.3		207.3			217.4			185
	Net earnings attributable to Fluor Corporation		166.5		161.4			173			166.8
	Basic earnings (loss) per share attributable to Fluor Corporation:
	Earnings from continuing operations	$	1.02	$	0.99		$	1.06		$	1.03
	Loss from discontinued operations, net of taxes		—		—			—			—
	Net earnings		1.02		0.99			1.06			1.03
	Diluted earnings (loss) per share attributable to Fluor Corporation:
	Earnings from continuing operations		1.02		0.98			1.05			1.01
	Loss from discontinued operations, net of taxes		—		—			—			—
	Net earnings		1.02		0.98			1.05			1.01

Major_Accounting_Policies_Deta

Major Accounting Policies (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Engineering and Construction Contracts
Advances on contract work in progress	$471	$544

Major_Accounting_Policies_Deta1

Major Accounting Policies (Details 2) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Property plant and equipment
Property, plant and equipment, at cost	2,061,461	$2,073,878
Buildings
Property plant and equipment
Property, plant and equipment, at cost	281,852	282,842
Buildings | Minimum
Property plant and equipment
Estimated Useful Service Lives	20 years
Buildings | Maximum
Property plant and equipment
Estimated Useful Service Lives	40 years
Building and leasehold improvements
Property plant and equipment
Property, plant and equipment, at cost	172,789	175,740
Building and leasehold improvements | Minimum
Property plant and equipment
Estimated Useful Service Lives	6 years
Building and leasehold improvements | Maximum
Property plant and equipment
Estimated Useful Service Lives	20 years
Machinery and equipment
Property plant and equipment
Property, plant and equipment, at cost	1,305,623	1,328,434
Machinery and equipment | Minimum
Property plant and equipment
Estimated Useful Service Lives	2 years
Machinery and equipment | Maximum
Property plant and equipment
Estimated Useful Service Lives	10 years
Furniture and fixtures
Property plant and equipment
Property, plant and equipment, at cost	142,961	$146,498
Furniture and fixtures | Minimum
Property plant and equipment
Estimated Useful Service Lives	2 years
Furniture and fixtures | Maximum
Property plant and equipment
Estimated Useful Service Lives	10 years

Major_Accounting_Policies_Deta2

Major Accounting Policies (Details 3) (USD $)	0 Months Ended	3 Months Ended	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Mar. 31, 2014	Dec. 31, 2014	Dec. 31, 2013
Goodwill and Intangible Assets
Goodwill impaired		$0
Carrying value of intangible assets	23		23	24
Intangible assets with indefinite lives impaired	$0
Minimum
Finite lived intangible assets
Useful lives of intangible assets with finite lives			1 year
Maximum
Finite lived intangible assets
Useful lives of intangible assets with finite lives			10 years

Major_Accounting_Policies_Deta3

Major Accounting Policies (Details 4) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Other comprehensive income (loss), Before-Tax Amount:
Total other comprehensive loss, Before-Tax Amount	($301,963)	($69,411)	($94,077)
Less: Other comprehensive loss attributable to noncontrolling interests, Before-Tax Amount	-7,309	-772	-948
Other comprehensive loss attributable to Fluor Corporation, Before-Tax Amount	-294,654	-68,639	-93,129
Other comprehensive income (loss), Tax (Expense) Benefit:
Total other comprehensive loss, Tax (Expense) Benefit	108,643	28,288	34,571
Other comprehensive loss attributable to Fluor Corporation, Tax (Expense) Benefit	108,643	28,288	34,571
Other comprehensive income (loss), Net-of-Tax:
Total other comprehensive loss, Net-of-Tax Amount	-193,320	-41,123	-59,506
Less: Other comprehensive loss attributable to noncontrolling interests, Net-of-Tax Amount	-7,309	-772	-948
Other comprehensive loss attributable to Fluor Corporation, Net-of-Tax Amount	-186,011	-40,351	-58,558
Foreign Currency Translation
Other comprehensive income (loss), Before-Tax Amount:
Total other comprehensive loss, Before-Tax Amount	-197,361	-74,538	47,780
Other comprehensive income (loss), Tax (Expense) Benefit:
Total other comprehensive loss, Tax (Expense) Benefit	71,552	27,637	-18,077
Other comprehensive income (loss), Net-of-Tax:
Total other comprehensive loss, Net-of-Tax Amount	-125,809	-46,901	29,703
Less: Other comprehensive loss attributable to noncontrolling interests, Net-of-Tax Amount	-6,557	-838
Other comprehensive loss attributable to Fluor Corporation, Net-of-Tax Amount	-119,252	-46,063	30,129
Ownership Share of Equity Method Investees' Other Comprehensive Income
Other comprehensive income (loss), Before-Tax Amount:
Total other comprehensive loss, Before-Tax Amount	5,892	13,117	1,487
Other comprehensive income (loss), Tax (Expense) Benefit:
Total other comprehensive loss, Tax (Expense) Benefit	-4,054	-2,372	-924
Other comprehensive income (loss), Net-of-Tax:
Total other comprehensive loss, Net-of-Tax Amount	1,838	10,745	563
Other comprehensive loss attributable to Fluor Corporation, Net-of-Tax Amount	1,838	10,745	563
Defined Benefit Pension and Postretirement Plans
Other comprehensive income (loss), Before-Tax Amount:
Total other comprehensive loss, Before-Tax Amount	-106,957	-8,917	-145,848
Other comprehensive income (loss), Tax (Expense) Benefit:
Total other comprehensive loss, Tax (Expense) Benefit	40,109	3,344	54,693
Other comprehensive income (loss), Net-of-Tax:
Total other comprehensive loss, Net-of-Tax Amount	-66,848	-5,573	-91,155
Other comprehensive loss attributable to Fluor Corporation, Net-of-Tax Amount	-66,848	-5,573	-91,155
Unrealized Gain (Loss) on Derivative Contracts
Other comprehensive income (loss), Before-Tax Amount:
Total other comprehensive loss, Before-Tax Amount	-2,837	2,171	2,369
Other comprehensive income (loss), Tax (Expense) Benefit:
Total other comprehensive loss, Tax (Expense) Benefit	773	-787	-1,071
Other comprehensive income (loss), Net-of-Tax:
Total other comprehensive loss, Net-of-Tax Amount	-2,064	1,384	1,298
Less: Other comprehensive loss attributable to noncontrolling interests, Net-of-Tax Amount	-752	66
Other comprehensive loss attributable to Fluor Corporation, Net-of-Tax Amount	-1,312	1,318	1,820
Unrealized Gain (Loss) on Available-for-Sale Securities
Other comprehensive income (loss), Before-Tax Amount:
Total other comprehensive loss, Before-Tax Amount	-700	-1,244	135
Other comprehensive income (loss), Tax (Expense) Benefit:
Total other comprehensive loss, Tax (Expense) Benefit	263	466	-50
Other comprehensive income (loss), Net-of-Tax:
Total other comprehensive loss, Net-of-Tax Amount	-437	-778	85
Other comprehensive loss attributable to Fluor Corporation, Net-of-Tax Amount	($437)	($778)	$85

Major_Accounting_Policies_Deta4

Major Accounting Policies (Details 5) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Changes in AOCI balances by component (after-tax)
Accumulated Other Comprehensive Income (Loss), Net, balance as of beginning of year	($298,201)	($257,850)	($199,292)
Other comprehensive income (loss) before reclassifications	-204,634	-52,161
Amount reclassified from AOCI	18,623	11,810
Other comprehensive loss attributable to Fluor Corporation, Net-of-Tax Amount	-186,011	-40,351	-58,558
Accumulated Other Comprehensive Income (Loss), Net, balance as of end of year	-484,212	-298,201	-257,850
Foreign Currency Translation
Changes in AOCI balances by component (after-tax)
Accumulated Other Comprehensive Income (Loss), Net, balance as of beginning of year	-164	45,899	15,770
Other comprehensive income (loss) before reclassifications	-119,252	-46,063
Other comprehensive loss attributable to Fluor Corporation, Net-of-Tax Amount	-119,252	-46,063	30,129
Accumulated Other Comprehensive Income (Loss), Net, balance as of end of year	-119,416	-164	45,899
Ownership Share of Equity Method Investees' Other Comprehensive Income
Changes in AOCI balances by component (after-tax)
Accumulated Other Comprehensive Income (Loss), Net, balance as of beginning of year	-32,274	-43,019	-43,582
Other comprehensive income (loss) before reclassifications	-7,958	10,745
Amount reclassified from AOCI	9,796
Other comprehensive loss attributable to Fluor Corporation, Net-of-Tax Amount	1,838	10,745	563
Accumulated Other Comprehensive Income (Loss), Net, balance as of end of year	-30,436	-32,274	-43,019
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	-258,297	-252,724	-161,569
Other comprehensive income (loss) before reclassifications	-74,924	-13,655
Amount reclassified from AOCI	8,076	8,082
Other comprehensive loss attributable to Fluor Corporation, Net-of-Tax Amount	-66,848	-5,573	-91,155
Accumulated Other Comprehensive Income (Loss), Net, balance as of end of year	-325,145	-258,297	-252,724
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	-7,642	-8,960	-10,780
Other comprehensive income (loss) before reclassifications	-2,151	-2,536
Amount reclassified from AOCI	839	3,854
Other comprehensive loss attributable to Fluor Corporation, Net-of-Tax Amount	-1,312	1,318	1,820
Accumulated Other Comprehensive Income (Loss), Net, balance as of end of year	-8,954	-7,642	-8,960
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	176	954	869
Other comprehensive income (loss) before reclassifications	-349	-652
Amount reclassified from AOCI	-88	-126
Other comprehensive loss attributable to Fluor Corporation, Net-of-Tax Amount	-437	-778	85
Accumulated Other Comprehensive Income (Loss), Net, balance as of end of year	($261)	$176	$954

Major_Accounting_Policies_Deta5

Major Accounting Policies (Details 6) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
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	$7,952	$8,724
Other comprehensive income (loss) before reclassifications attributable to noncontrolling interests	-7,352	-776
Amount reclassified from AOCI attributable to noncontrolling interests	43	4
Net other comprehensive income (loss) attributable to noncontrolling interests	-7,309	-772	-948
Accumulated Other Comprehensive Income (Loss), Net, Attributable to Noncontrolling Interests, balance as of end of year	643	7,952	8,724
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	7,885	8,723
Other comprehensive income (loss) before reclassifications attributable to noncontrolling interests	-6,557	-838
Net other comprehensive income (loss) attributable to noncontrolling interests	-6,557	-838
Accumulated Other Comprehensive Income (Loss), Net, Attributable to Noncontrolling Interests, balance as of end of year	1,328	7,885
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	67	1
Other comprehensive income (loss) before reclassifications attributable to noncontrolling interests	-795	62
Amount reclassified from AOCI attributable to noncontrolling interests	43	4
Net other comprehensive income (loss) attributable to noncontrolling interests	-752	66
Accumulated Other Comprehensive Income (Loss), Net, Attributable to Noncontrolling Interests, balance as of end of year	($685)	$67

Major_Accounting_Policies_Deta6

Major Accounting Policies (Details 7) (USD $)	3 Months Ended								12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Reclassifications out of accumulated other comprehensive income (loss)
Total cost of revenue	($5,093,800)	($5,060,000)	($4,906,400)	($5,072,300)	($5,955,400)	($6,329,700)	($6,857,500)	($6,843,800)	($20,132,544)	($25,986,382)	($26,692,138)
Interest expense									-29,681	-26,887	-28,238
Corporate general and administrative expense									-182,711	-175,148	-151,010
Income tax benefit (expense) (net)									-352,815	-354,573	-162,438
NET EARNINGS	229,300	114,900	110,000	193,300	185,000	217,400	207,300	213,300	647,543	823,026	571,067
Net earnings attributable to noncontrolling interests									-136,634	-155,315	-114,737
Net of tax and noncontrolling interest	214,500	69,500	77,800	149,100	166,800	173,000	161,400	166,500	510,909	667,711	456,330
Ownership Share of Equity Method Investees' Other Comprehensive Income | Reclassified out of AOCI
Reclassifications out of accumulated other comprehensive income (loss)
Total cost of revenue									-15,662
Income tax benefit (expense) (net)									5,866
NET EARNINGS									-9,796
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									-12,922	-12,931
Income tax benefit (expense) (net)									4,846	4,849
NET EARNINGS									-8,076	-8,082
Unrealized Gain (Loss) on Derivative Contracts | Reclassified out of AOCI
Reclassifications out of accumulated other comprehensive income (loss)
Income tax benefit (expense) (net)									541	2,322
NET EARNINGS									-882	-3,858
Net earnings attributable to noncontrolling interests									43	4
Net of tax and noncontrolling interest									-839	-3,854
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									255	-4,502
Unrealized Gain (Loss) on Derivative Contracts | Reclassified out of AOCI | Interest rate contracts
Reclassifications out of accumulated other comprehensive income (loss)
Interest expense									-1,678	-1,678
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									140	202
Income tax benefit (expense) (net)									-52	-76
NET EARNINGS									$88	$126

Discontinued_Operations_Detail

Discontinued Operations (Details) (St. Joe and Doe Run, USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014
St. Joe and Doe Run
Discontinued Operations
Loss from discontinued operations in connection with reassessment of estimated loss contingencies, net of taxes	$205
Loss from discontinued operations in connection with reassessment of estimated loss contingencies, taxes	$112

Consolidated_Statement_of_Cash2

Consolidated Statement of Cash Flows (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
(Increase) decrease in:
Accounts and notes receivable, net	($336,109)	($98,744)	$23,680
Contract work in progress	50,570	101,158	29,669
Other current assets	28,482	102,417	-111,311
Other assets	44,580	-26,204	-65,418
Increase (decrease) in:
Trade accounts payable	-153,515	-274,418	195,147
Advance billings on contracts	-63,594	-29,043	-237,497
Accrued liabilities	31,697	-83,613	28,993
Other liabilities	-10,972	46,851	-58,773
Decrease in cash due to changes in operating assets and liabilities	-408,861	-261,596	-195,510
Cash paid during the year for:
Interest	23,509	22,585	24,244
Income taxes, net of refunds	$228,471	$268,889	$294,214

Income_Taxes_Details

Income Taxes (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Current:
Federal	$126,490	$200,608	($133,312)
Foreign	151,240	168,894	226,110
State and local	13,001	14,779	-7,804
Total current	290,731	384,281	84,994
Deferred:
Federal	74,037	-29,873	87,723
Foreign	-10,353	2,054	-16,645
State and local	-1,600	-1,889	6,366
Total deferred	62,084	-29,708	77,444
Total income tax expense	$352,815	$354,573	$162,438

Income_Taxes_Details_2

Income Taxes (Details 2) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Reconciliation of U.S. statutory federal income tax expense to income tax expense
U.S. statutory federal tax expense	$421,718	$412,159	$256,727
Increase (decrease) in taxes resulting from:
State and local income taxes	7,670	7,802	1,727
Other permanent items, net	-9,378	-17,517	-4,849
Noncontrolling interests	-47,822	-54,359	-39,600
Foreign losses, net	27,660	-18,568	-84,366
Valuation allowance, net	-36,523	15,305	85,541
Statute expirations and tax authority settlements	-19,331		-13,152
Other changes to unrecognized tax positions	5,574	9,261	-29,740
Other, net	3,247	490	-9,850
Total income tax expense	$352,815	$354,573	$162,438

Income_Taxes_Details_3

Income Taxes (Details 3) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Accrued liabilities not currently deductible:
Employee compensation and benefits	$53,672	$54,723
Employee time-off accrual	92,901	94,213
Project and non-project reserves	27,520	24,753
Accrual for discontinued operations	110,714
Workers' compensation insurance accruals	13,122	14,400
Tax basis of investments in excess of book basis	4,264	4,957
Revenue recognition	36,890	36,180
Net operating loss carryforward	236,138	266,664
Unrealized currency loss	4,161	6,817
Foreign tax credits		30,705
Other comprehensive loss	288,494	179,228
Other	39,552	21,274
Total deferred tax assets	907,428	733,914
Valuation allowance for deferred tax assets	-208,905	-245,428
Deferred tax assets, net	698,523	488,486
Deferred tax liabilities:
Book basis of property, equipment and other capital costs in excess of tax basis	-53,750	-36,169
Residual U.S. tax on unremitted non-U.S. earnings	-85,669	-50,569
Other	-17,877	-16,179
Total deferred tax liabilities	-157,296	-102,917
Deferred tax assets, net of deferred tax liabilities	$541,227	$385,569

Income_Taxes_Details_4

Income Taxes (Details 4) (Foreign, USD $)	Dec. 31, 2014
Foreign
Net operating loss carryforwards
Non-U.S. net operating loss carryforwards	$1,000,000,000
Net operating loss carryforwards, indefinite carry forward period	977,000,000
Net operating loss carryforwards, subject to expiration	$48,000,000

Income_Taxes_Details_5

Income Taxes (Details 5) (USD $)	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Unrecognized tax benefits
Unrecognized tax benefits that would impact effective tax rate	$25,000,000				$40,000,000				$25,000,000	$40,000,000
Reconciliation of the beginning and ending amount of unrecognized tax benefits including interest and penalties
Balance at beginning of year				54,054,000				47,043,000	54,054,000	47,043,000
Change in tax positions of prior years									6,727,000	1,015,000
Change in tax positions of current year									3,600,000	7,397,000
Reduction in tax positions for statute expirations									-2,275,000	-1,401,000
Reduction in tax positions for audit settlements									-28,134,000
Balance at end of year	33,972,000				54,054,000				33,972,000	54,054,000	47,043,000
Accrued interest and penalties as of date	7,000,000				7,000,000				7,000,000	7,000,000
U.S. and foreign earnings from continuing operations before taxes
EARNINGS FROM CONTINUING OPERATIONS BEFORE TAXES									332,497,000	303,070,000	279,890,000
Foreign earnings before taxes									872,412,000	874,529,000	453,615,000
EARNINGS FROM CONTINUING OPERATIONS BEFORE TAXES	304,700,000	343,400,000	285,300,000	271,500,000	267,900,000	304,700,000	298,700,000	306,300,000	1,204,909,000	1,177,599,000	733,505,000
IRS
Tax audit
Reduction in tax expense									$19,000,000		$13,000,000

Retirement_Benefits_Details

Retirement Benefits (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Defined contribution retirement plans
Defined contribution retirement plans, expense recognized	$150,000,000	$151,000,000	$144,000,000
Defined Benefit Pension Plans | Direct investment in company common stock or debt securities
Target allocations and the weighted average actual allocations of plan assets
Weighted average actual allocation (as a percent)	0.00%
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 Pension Plans | Maximum | Common or collective trusts
Target allocations and the weighted average actual allocations of plan assets
Redemption notice period to redeem investments	30 days
Defined Benefit U.S. Pension Plans
Retirement benefits
Unrecognized net actuarial losses classified in accumulated other comprehensive loss	274,000,000
Net periodic pension expense for defined benefit pension plans
Service cost	3,800,000	6,453,000	5,957,000
Interest cost	31,675,000	29,100,000	33,293,000
Expected return on assets	-30,105,000	-30,975,000	-35,322,000
Amortization of prior service cost/(credits)	750,000	103,000	-114,000
Recognized net actuarial loss	4,435,000	6,039,000	4,279,000
(Gain on curtailment)/loss on settlement		-309,000
Net periodic pension expense	10,555,000	10,411,000	8,093,000
For determining projected benefit obligation at year-end:
Discount rates (as a percent)	1.95%	4.95%	4.05%
For determining net periodic cost for the year:
Discount rates (as a percent)	4.95%	4.05%	5.05%
Expected long-term rates of return on assets (as a percent)	4.55%	4.25%	5.25%
Effect of change in assumptions used in calculations
Increase in plan liability, if discount rate were reduced by 25 basis points	17,000,000
Target allocations and the weighted average actual allocations of plan assets
Weighted average actual allocation (as a percent)	100.00%	100.00%
Defined Benefit U.S. Pension Plans | Debt securities
Target allocations and the weighted average actual allocations of plan assets
Target allocation, minimum (as a percent)	95.00%
Target allocation, maximum (as a percent)	100.00%
Weighted average actual allocation (as a percent)	93.00%	94.00%
Defined Benefit U.S. Pension Plans | Equity securities
Target allocations and the weighted average actual allocations of plan assets
Target allocation, minimum (as a percent)	0.00%
Target allocation, maximum (as a percent)	5.00%
Weighted average actual allocation (as a percent)	2.00%	5.00%
Defined Benefit U.S. Pension Plans | Other
Target allocations and the weighted average actual allocations of plan assets
Target allocation, minimum (as a percent)	0.00%
Target allocation, maximum (as a percent)	5.00%
Weighted average actual allocation (as a percent)	5.00%	1.00%
Defined Benefit Non-U.S. Pension Plans
Net periodic pension expense for defined benefit pension plans
Service cost	16,217,000	15,390,000	7,723,000
Interest cost	34,536,000	32,176,000	32,630,000
Expected return on assets	-48,077,000	-46,420,000	-41,949,000
Recognized net actuarial loss	7,738,000	6,788,000	1,663,000
Net periodic pension expense	10,414,000	7,934,000	67,000
Effect of change in assumptions used in calculations
Increase in plan liability, if discount rate were reduced by 25 basis points	$54,000,000
Target allocations and the weighted average actual allocations of plan assets
Weighted average actual allocation (as a percent)	100.00%	100.00%
Defined Benefit Non-U.S. Pension Plans | Debt securities
Target allocations and the weighted average actual allocations of plan assets
Target allocation, minimum (as a percent)	65.00%
Target allocation, maximum (as a percent)	75.00%
Weighted average actual allocation (as a percent)	71.00%	63.00%
Defined Benefit Non-U.S. Pension Plans | Equity securities
Target allocations and the weighted average actual allocations of plan assets
Target allocation, minimum (as a percent)	20.00%
Target allocation, maximum (as a percent)	30.00%
Weighted average actual allocation (as a percent)	25.00%	32.00%
Defined Benefit Non-U.S. Pension Plans | Other
Target allocations and the weighted average actual allocations of plan assets
Target allocation, minimum (as a percent)	0.00%
Target allocation, maximum (as a percent)	10.00%
Weighted average actual allocation (as a percent)	4.00%	5.00%
Defined Benefit Non-U.S. Pension Plans | Minimum
For determining projected benefit obligation at year-end:
Discount rates (as a percent)	2.20%	3.55%	3.60%
Rates of increase in compensation levels (as a percent)	2.25%	2.25%	2.25%
For determining net periodic cost for the year:
Discount rates (as a percent)	3.55%	3.60%	3.75%
Rates of increase in compensation levels (as a percent)	2.25%	2.25%	2.25%
Expected long-term rates of return on assets (as a percent)	4.75%	5.00%	5.00%
Defined Benefit Non-U.S. Pension Plans | Maximum
For determining projected benefit obligation at year-end:
Discount rates (as a percent)	5.00%	5.50%	6.00%
Rates of increase in compensation levels (as a percent)	8.00%	9.00%	9.00%
For determining net periodic cost for the year:
Discount rates (as a percent)	5.50%	6.00%	6.75%
Rates of increase in compensation levels (as a percent)	9.00%	9.00%	9.00%
Expected long-term rates of return on assets (as a percent)	7.00%	7.00%	7.00%

Retirement_Benefits_Details_2

Retirement Benefits (Details 2) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Defined Benefit U.S. Pension Plans
Retirement benefits
Plan assets, net	$751,268	$708,730	$767,296
Expected benefit payments for defined benefit pension plans
2015	820,586
Defined Benefit U.S. Pension Plans | Not measured at fair value
Retirement benefits
Plan assets, net	23	775
Defined Benefit U.S. Pension Plans | Carrying Value
Retirement benefits
Plan assets, net	751,268	708,730
Defined Benefit U.S. Pension Plans | Fair Value | Common Stock
Retirement benefits
Plan assets, net	19
Defined Benefit U.S. Pension Plans | Fair Value | Foreign currency contracts and other
Retirement benefits
Plan assets, net		-4,338
Defined Benefit U.S. Pension Plans | Fair Value | Equity securities | Common or collective trusts
Retirement benefits
Plan assets, net		17,068
Defined Benefit U.S. Pension Plans | Fair Value | Limited Partnerships
Retirement benefits
Plan assets, net	12,393	17,546
Defined Benefit U.S. Pension Plans | Fair Value | Debt securities | Common or collective trusts
Retirement benefits
Plan assets, net	698,193	202,575
Defined Benefit U.S. Pension Plans | Fair Value | Corporate bonds
Retirement benefits
Plan assets, net		397,524
Defined Benefit U.S. Pension Plans | Fair Value | Government securities
Retirement benefits
Plan assets, net		69,562
Defined Benefit U.S. Pension Plans | Fair Value | Money market funds | Common or collective trusts
Retirement benefits
Plan assets, net	40,640	3,644
Defined Benefit U.S. Pension Plans | Fair Value | Other assets
Retirement benefits
Plan assets, net		4,374
Defined Benefit U.S. Pension Plans | Fair Value | Total, at fair value
Retirement benefits
Plan assets, net	751,245	707,955
Defined Benefit U.S. Pension Plans | Level 1 | Common Stock
Retirement benefits
Plan assets, net	19
Defined Benefit U.S. Pension Plans | Level 1 | Total, at fair value
Retirement benefits
Plan assets, net	19
Defined Benefit U.S. Pension Plans | Level 2 | Foreign currency contracts and other
Retirement benefits
Plan assets, net		-4,338
Defined Benefit U.S. Pension Plans | Level 2 | Equity securities | Common or collective trusts
Retirement benefits
Plan assets, net		17,068
Defined Benefit U.S. Pension Plans | Level 2 | Debt securities | Common or collective trusts
Retirement benefits
Plan assets, net	698,193	202,575
Defined Benefit U.S. Pension Plans | Level 2 | Corporate bonds
Retirement benefits
Plan assets, net		397,524
Defined Benefit U.S. Pension Plans | Level 2 | Government securities
Retirement benefits
Plan assets, net		69,562
Defined Benefit U.S. Pension Plans | Level 2 | Money market funds | Common or collective trusts
Retirement benefits
Plan assets, net	40,640	3,644
Defined Benefit U.S. Pension Plans | Level 2 | Other assets
Retirement benefits
Plan assets, net		4,374
Defined Benefit U.S. Pension Plans | Level 2 | Total, at fair value
Retirement benefits
Plan assets, net	738,833	690,409
Defined Benefit U.S. Pension Plans | Significant Unobservable Inputs (Level 3)
Reconciliation of the beginning and ending balances of the fair value measurements using significant unobservable inputs (Level 3):
Balance at beginning of year	17,546	17,630
Actual return on plan assets, assets still held at reporting date	-2,454	418
Actual return on plan assets, assets sold during the period	124	357
Sales	-2,823	-859
Balance at end of year	12,393	17,546
Defined Benefit U.S. Pension Plans | Significant Unobservable Inputs (Level 3) | Limited Partnerships
Retirement benefits
Plan assets, net	12,393	17,546
Defined Benefit U.S. Pension Plans | Significant Unobservable Inputs (Level 3) | Total, at fair value
Retirement benefits
Plan assets, net	12,393	17,546
Defined Benefit Non-U.S. Pension Plans
Retirement benefits
Plan assets, net	1,032,133	945,837	886,141
Expected benefit payments for defined benefit pension plans
2015	26,497
2016	27,250
2017	28,914
2018	29,443
2019	31,706
2020 - 2024	177,582
Defined Benefit Non-U.S. Pension Plans | Not measured at fair value
Retirement benefits
Plan assets, net	14,456	9,268
Defined Benefit Non-U.S. Pension Plans | Carrying Value
Retirement benefits
Plan assets, net	1,032,133	945,837
Defined Benefit Non-U.S. Pension Plans | Fair Value | Foreign currency contracts and other
Retirement benefits
Plan assets, net	-11,038	-3,979
Defined Benefit Non-U.S. Pension Plans | Fair Value | Equity securities | Common or collective trusts
Retirement benefits
Plan assets, net	200,701	228,608
Defined Benefit Non-U.S. Pension Plans | Fair Value | Common and preferred stock
Retirement benefits
Plan assets, net	54,890	71,567
Defined Benefit Non-U.S. Pension Plans | Fair Value | Debt securities | Common or collective trusts
Retirement benefits
Plan assets, net	378,569	321,086
Defined Benefit Non-U.S. Pension Plans | Fair Value | Corporate bonds
Retirement benefits
Plan assets, net	149,152	107,658
Defined Benefit Non-U.S. Pension Plans | Fair Value | Government securities
Retirement benefits
Plan assets, net	195,305	160,586
Defined Benefit Non-U.S. Pension Plans | Fair Value | Other | Common or collective trusts
Retirement benefits
Plan assets, net	37,092	48,409
Defined Benefit Non-U.S. Pension Plans | Fair Value | Other assets
Retirement benefits
Plan assets, net	13,006	2,634
Defined Benefit Non-U.S. Pension Plans | Fair Value | Total, at fair value
Retirement benefits
Plan assets, net	1,017,677	936,569
Defined Benefit Non-U.S. Pension Plans | Level 1 | Common and preferred stock
Retirement benefits
Plan assets, net	54,890	71,567
Defined Benefit Non-U.S. Pension Plans | Level 1 | Total, at fair value
Retirement benefits
Plan assets, net	54,890	71,567
Defined Benefit Non-U.S. Pension Plans | Level 2 | Foreign currency contracts and other
Retirement benefits
Plan assets, net	-11,038	-3,979
Defined Benefit Non-U.S. Pension Plans | Level 2 | Equity securities | Common or collective trusts
Retirement benefits
Plan assets, net	200,701	228,608
Defined Benefit Non-U.S. Pension Plans | Level 2 | Debt securities | Common or collective trusts
Retirement benefits
Plan assets, net	378,569	321,086
Defined Benefit Non-U.S. Pension Plans | Level 2 | Corporate bonds
Retirement benefits
Plan assets, net	149,152	107,658
Defined Benefit Non-U.S. Pension Plans | Level 2 | Government securities
Retirement benefits
Plan assets, net	195,305	160,586
Defined Benefit Non-U.S. Pension Plans | Level 2 | Other | Common or collective trusts
Retirement benefits
Plan assets, net	30,441	40,667
Defined Benefit Non-U.S. Pension Plans | Level 2 | Other assets
Retirement benefits
Plan assets, net	13,006	2,634
Defined Benefit Non-U.S. Pension Plans | Level 2 | Total, at fair value
Retirement benefits
Plan assets, net	956,136	857,260
Defined Benefit Non-U.S. Pension Plans | Significant Unobservable Inputs (Level 3)
Reconciliation of the beginning and ending balances of the fair value measurements using significant unobservable inputs (Level 3):
Balance at beginning of year	7,742	7,800
Actual return on plan assets, assets still held at reporting date	-886	-58
Actual return on plan assets, assets sold during the period	3
Sales	-208
Balance at end of year	6,651	7,742
Defined Benefit Non-U.S. Pension Plans | Significant Unobservable Inputs (Level 3) | Other | Common or collective trusts
Retirement benefits
Plan assets, net	6,651	7,742
Defined Benefit Non-U.S. Pension Plans | Significant Unobservable Inputs (Level 3) | Total, at fair value
Retirement benefits
Plan assets, net	$6,651	$7,742

Retirement_Benefits_Details_3

Retirement Benefits (Details 3) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Defined Benefit Pension Plans | United States, Netherlands and Philippines
Pension plans with accumulated benefit obligations in excess of plan assets
Projected benefit obligations in excess of plan assets	$1,500,000,000
Fair value of plan assets for plans with projected benefit obligations in excess of plan assets	1,300,000,000
Defined Benefit U.S. Pension Plans
Change in projected benefit obligation
Benefit obligation at beginning of year	686,977,000	756,976,000
Service cost	3,800,000	6,453,000	5,957,000
Interest cost	31,675,000	29,100,000	33,293,000
Actuarial (gain) loss	146,643,000	-59,990,000
Plan amendments	2,236,000	6,367,000
Benefits paid	-52,199,000	-48,204,000
Other	-3,764,000	-3,725,000
Benefit obligation at end of year	815,368,000	686,977,000	756,976,000
Change in plan assets
Plan assets at beginning of year	708,730,000	767,296,000
Actual return on plan assets	62,501,000	-6,637,000
Company contributions	36,000,000
Benefits paid	-52,199,000	-48,204,000
Other	-3,764,000	-3,725,000
Plan assets at end of year	751,268,000	708,730,000	767,296,000
(Under)/overfunded amounts	-64,100,000	21,753,000
Amounts recognized in the Consolidated Balance Sheet
Accumulated other comprehensive loss (pre-tax)	273,832,000	162,534,000
Pension plans with accumulated benefit obligations in excess of plan assets
The total accumulated benefit obligation	815,000,000	687,000,000
Defined Benefit U.S. Pension Plans | Minimum
Amounts recognized in the Consolidated Balance Sheet
Amount of accumulated other comprehensive loss expected to be recognized as components of net periodic pension expense in next fiscal year	10,000,000
Defined Benefit U.S. Pension Plans | Other assets
Amounts recognized in the Consolidated Balance Sheet
Pension assets		21,753,000
Defined Benefit U.S. Pension Plans | Noncurrent liabilities
Amounts recognized in the Consolidated Balance Sheet
Pension liabilities	-64,100,000
Defined Benefit Non-U.S. Pension Plans
Change in projected benefit obligation
Benefit obligation at beginning of year	908,530,000	826,466,000
Service cost	16,217,000	15,390,000	7,723,000
Interest cost	34,536,000	32,176,000	32,630,000
Employee contributions	4,448,000	3,832,000
Currency translation	-110,188,000	25,885,000
Actuarial (gain) loss	196,021,000	29,510,000
Plan amendments	-17,921,000
Benefits paid	-26,505,000	-24,729,000
Benefit obligation at end of year	1,005,138,000	908,530,000	826,466,000
Change in plan assets
Plan assets at beginning of year	945,837,000	886,141,000
Actual return on plan assets	191,929,000	40,508,000
Company contributions	26,816,000	13,133,000
Employee contributions	4,448,000	3,832,000
Currency translation	-110,392,000	26,952,000
Benefits paid	-26,505,000	-24,729,000
Plan assets at end of year	1,032,133,000	945,837,000	886,141,000
(Under)/overfunded amounts	26,995,000	37,307,000
Amounts recognized in the Consolidated Balance Sheet
Accumulated other comprehensive loss (pre-tax)	250,399,000	252,995,000
Amount of accumulated other comprehensive loss expected to be recognized as components of net periodic pension expense in next fiscal year	7,000,000
Pension plans with accumulated benefit obligations in excess of plan assets
The total accumulated benefit obligation	937,000,000	853,000,000
Defined Benefit Non-U.S. Pension Plans | Other assets
Amounts recognized in the Consolidated Balance Sheet
Pension assets	82,820,000	58,849,000
Defined Benefit Non-U.S. Pension Plans | Noncurrent liabilities
Amounts recognized in the Consolidated Balance Sheet
Pension liabilities	($55,825,000)	($21,542,000)

Retirement_Benefits_Details_4

Retirement Benefits (Details 4) (Postretirement Benefit, USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Health care cost trend rates
Health care cost trend rates in next fiscal year (as a percent)	7.50%
Health care cost trend rates in 2025 and beyond (as a percent)	5.00%
A one-percentage-point change in assumed health care cost trend rates
Effect of a one percent annual increase in the assumed cost trend rates on the accumulated postretirement benefit obligation	$400,000
Effect of a one percent annual decrease in the assumed cost trend rates on the accumulated postretirement benefit obligation	400,000
Net periodic benefit cost
Interest cost	388,000	351,000	592,000
Recognized net actuarial loss	151,000	341,000	640,000
Net periodic pension expense	539,000	692,000	1,232,000
Maximum
A one-percentage-point change in assumed health care cost trend rates
Effect of a one percent annual increase in the assumed cost trend rates on the accumulated postretirement benefit obligation interest cost	100,000
Effect of a one percent annual decrease in the assumed cost trend rates on the accumulated postretirement benefit obligation interest cost	$100,000

Retirement_Benefits_Details_5

Retirement Benefits (Details 5) (Postretirement Benefit, USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Postretirement Benefit
Change in accumulated benefit obligation
Benefit obligation at beginning of year	$12,629,000	$12,629,000	$14,512,000
Interest cost	388,000	351,000	592,000
Employee contributions	356,000	421,000
Actuarial (gain) loss	-252,000	-596,000
Benefits paid	-1,811,000	-2,059,000
Benefit obligation at end of year	11,310,000	12,629,000	12,629,000
Funded status	-11,310,000	-12,629,000
Amounts recognized in the Consolidated Balance Sheet
Unrecognized net actuarial losses classified in accumulated other comprehensive loss	1,000,000	2,000,000
Accumulated postretirement benefit obligation classified in current liabilities	$2,000,000	$3,000,000
Assumptions used for determining accumulated benefit obligation
Discount rate (as a percent)	3.25%	3.40%

Retirement_Benefits_Details_6

Retirement Benefits (Details 6) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Multiemployer pension plans
Company contributions to multiemployer pension plans	$23	$19	$24

Fair_Value_of_Financial_Instru2

Fair Value of Financial Instruments (Details) (USD $)	0 Months Ended		12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Fair value of assets and liabilities measured on recurring basis
Deferred compensation trusts	$405,022,000	$388,408,000	$405,022,000	$388,408,000
Other-than-temporary impairment of available-for-sale securities	0	0
Proceeds from the sales and maturities of available-for-sale securities			274,000,000	346,000,000	523,000,000
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	14,000,000	50,000,000	14,000,000	50,000,000
Fair Value, Measurements, Recurring | U.S. agency securities
Fair value of assets and liabilities measured on recurring basis
Available-for-sale securities	73,000,000	119,000,000	73,000,000	119,000,000
Fair Value, Measurements, Recurring | U.S. Treasury securities
Fair value of assets and liabilities measured on recurring basis
Available-for-sale securities	107,000,000	26,000,000	107,000,000	26,000,000
Fair Value, Measurements, Recurring | Corporate debt securities
Fair value of assets and liabilities measured on recurring basis
Available-for-sale securities	245,000,000	235,000,000	245,000,000	235,000,000
Fair Value, Measurements, Recurring | Commercial paper
Fair value of assets and liabilities measured on recurring basis
Available-for-sale securities		7,000,000		7,000,000
Fair Value, Measurements, Recurring | Fair Value
Fair value of assets and liabilities measured on recurring basis
Cash and cash equivalents	14,419,000	50,081,000	14,419,000	50,081,000
Marketable securities, current	80,706,000	111,333,000	80,706,000	111,333,000
Deferred compensation trusts	94,893,000	87,507,000	94,893,000	87,507,000
Marketable securities, noncurrent	343,644,000	275,402,000	343,644,000	275,402,000
Fair Value, Measurements, Recurring | Fair Value | Commodity contracts
Fair value of assets and liabilities measured on recurring basis
Derivative assets	561,000	438,000	561,000	438,000
Derivative liabilities	2,290,000	3,000	2,290,000	3,000
Fair Value, Measurements, Recurring | Fair Value | Foreign currency contracts
Fair value of assets and liabilities measured on recurring basis
Derivative assets	180,000	855,000	180,000	855,000
Derivative liabilities	4,392,000	967,000	4,392,000	967,000
Fair Value, Measurements, Recurring | Level 1
Fair value of assets and liabilities measured on recurring basis
Cash and cash equivalents	14,419,000	50,081,000	14,419,000	50,081,000
Deferred compensation trusts	94,893,000	87,507,000	94,893,000	87,507,000
Fair Value, Measurements, Recurring | Level 2
Fair value of assets and liabilities measured on recurring basis
Marketable securities, current	80,706,000	111,333,000	80,706,000	111,333,000
Marketable securities, noncurrent	343,644,000	275,402,000	343,644,000	275,402,000
Fair Value, Measurements, Recurring | Level 2 | Commodity contracts
Fair value of assets and liabilities measured on recurring basis
Derivative assets	561,000	438,000	561,000	438,000
Derivative liabilities	2,290,000	3,000	2,290,000	3,000
Fair Value, Measurements, Recurring | Level 2 | Foreign currency contracts
Fair value of assets and liabilities measured on recurring basis
Derivative assets	180,000	855,000	180,000	855,000
Derivative liabilities	$4,392,000	$967,000	$4,392,000	$967,000

Fair_Value_of_Financial_Instru3

Fair Value of Financial Instruments (Details 2) (USD $)	Dec. 31, 2014	Dec. 31, 2013	Sep. 30, 2011	Nov. 30, 2014	Dec. 31, 2012	Feb. 29, 2004
In Thousands, unless otherwise specified
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 instrument 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
Debt instrument interest rate (as a percent)	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
Debt instrument interest rate (as a percent)	1.50%	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	1,224,834	1,444,656
Cash equivalents	753,872	788,845
Marketable securities, current	24,425	74,690
Notes receivable, including noncurrent portion	19,284	27,602
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	10,418	11,441
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	497,045	496,604
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	494,640
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	18,398
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	1,224,834	1,444,656
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	753,872	788,845
Marketable securities, current	24,425	74,690
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	10,418	11,441
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	510,465	484,204
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	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	40,826	54,027
Fair Value | Significant Unobservable Inputs (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	19,284	27,602

Derivatives_and_Hedging_Detail

Derivatives and Hedging (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Commodity contracts
Derivatives, Fair Value
Total gross notional amount	12,000,000
Commodity contracts | Maximum
Derivatives, Fair Value
Derivative contract maturity	31-May-17
Foreign currency contracts
Derivatives, Fair Value
Total gross notional amount	235,000,000
Foreign currency contracts | Maximum
Derivatives, Fair Value
Derivative contract maturity	31-Dec-16
Designated as Hedging Instrument
Derivatives, Fair Value
Asset Derivatives	741,000	1,293,000
Liability Derivatives	6,682,000	970,000
Designated as Hedging Instrument | Commodity contracts | Other current assets
Derivatives, Fair Value
Asset Derivatives	365,000	296,000
Designated as Hedging Instrument | Commodity contracts | Other assets
Derivatives, Fair Value
Asset Derivatives	196,000	142,000
Designated as Hedging Instrument | Commodity contracts | Other accrued liabilities
Derivatives, Fair Value
Liability Derivatives	1,362,000	3,000
Designated as Hedging Instrument | Commodity contracts | Noncurrent liabilities
Derivatives, Fair Value
Liability Derivatives	928,000
Designated as Hedging Instrument | Foreign currency contracts | Other current assets
Derivatives, Fair Value
Asset Derivatives	128,000	855,000
Designated as Hedging Instrument | Foreign currency contracts | Other assets
Derivatives, Fair Value
Asset Derivatives	52,000
Designated as Hedging Instrument | Foreign currency contracts | Other accrued liabilities
Derivatives, Fair Value
Liability Derivatives	3,721,000	967,000
Designated as Hedging Instrument | Foreign currency contracts | Noncurrent liabilities
Derivatives, Fair Value
Liability Derivatives	671,000

Derivatives_and_Hedging_Detail1

Derivatives and Hedging (Details 2) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Derivative Instruments, Gain (Loss)
After-tax amount of gain (loss) recognized in OCI	($2,151)	($2,536)	$4,071
After-tax amount of gain (loss) reclassified from AOCI into earnings	-839	-3,854	2,251
Commodity contracts
Derivative Instruments, Gain (Loss)
After-tax amount of gain (loss) recognized in OCI	-881	265	1,138
Commodity contracts | Total cost of revenue
Derivative Instruments, Gain (Loss)
After-tax amount of gain (loss) reclassified from AOCI into earnings	-59	50	1,859
Foreign currency contracts
Derivative Instruments, Gain (Loss)
After-tax amount of gain (loss) recognized in OCI	-1,270	-2,801	2,933
Foreign currency contracts | Corporate general and administrative expense
Derivative Instruments, Gain (Loss)
Net Gains Recognized in Earnings	-3,322	2,885	-14,236
Foreign currency contracts | Total cost of revenue
Derivative Instruments, Gain (Loss)
After-tax amount of gain (loss) reclassified from AOCI into earnings	269	-2,855	1,441
Interest rate contracts | Interest expense
Derivative Instruments, Gain (Loss)
After-tax amount of gain (loss) reclassified from AOCI into earnings	($1,049)	($1,049)	($1,049)

Financing_Arrangements_Details

Financing Arrangements (Details) (USD $)	0 Months Ended		1 Months Ended	12 Months Ended		1 Months Ended
	Feb. 15, 2014	Feb. 17, 2009	Feb. 29, 2004	Dec. 31, 2014	Dec. 31, 2013	Sep. 30, 2011	Nov. 30, 2014	Dec. 31, 2012	Dec. 30, 2004
			item
Current:
Debt, Current				$28,742,000	$29,839,000
Long-Term:
Debt, Long-Term				991,685,000	496,604,000
Common stock, par value (in dollars per share)			$0.01	$0.01	$0.01
1.5% Convertible Senior Notes due February 15, 2024
Financing Arrangements
Debt instrument interest rate (as a percent)			1.50%	1.50%	1.50%			1.50%
Current:
Debt, Current				18,324,000	18,398,000
Long-Term:
Issue price of notes			330,000,000
Proceeds from notes			323,000,000
Conversion rate per $1,000 principal amount of Notes (in shares)			36.6729
Number of days within 30 consecutive trading days in which the closing price of the entity's common stock must exceed the conversion price for the notes to be redeemable			20
Number of consecutive trading days during which the closing price of the entity's common stock must exceed the conversion price for at least 20 days in order for the notes to be redeemable			30 days
Percentage of the closing sales price of the entity's common stock that the conversion price must exceed in order for the notes to be convertible			130.00%
Current trigger price (in dollars per share)				$35.45
Redemption price as a percentage of principal	100.00%	100.00%		100.00%
Conversion price (in dollars per share)									$27.27
Debt conversions (in shares)				1,750	1,562
1.5% Convertible Senior Notes due February 15, 2024 | Change of control triggering event
Long-Term:
Redemption price as a percentage of principal				100.00%
1.5% Convertible Senior Notes due February 15, 2024 | Maximum
Long-Term:
Debt conversion, amount of original debt				100,000	100,000
3.375% Senior Notes
Financing Arrangements
Debt instrument interest rate (as a percent)				3.38%	3.38%	3.38%
Long-Term:
Debt, Long-Term				497,045,000	496,604,000
Issue price of notes						500,000,000
Proceeds from notes						492,000,000
Redemption price as a percentage of principal				100.00%
3.375% Senior Notes | Change of control triggering event
Long-Term:
Redemption price as a percentage of principal				101.00%
3.5% Senior Notes
Financing Arrangements
Debt instrument interest rate (as a percent)				3.50%			3.50%
Long-Term:
Debt, Long-Term				494,640,000
Issue price of notes							500,000,000
Proceeds from notes							491,000,000
3.5% Senior Notes | Prior to September 15, 2024
Long-Term:
Redemption price as a percentage of principal				100.00%
3.5% Senior Notes | On or after September 15, 2024
Long-Term:
Redemption price as a percentage of principal				100.00%
3.5% Senior Notes | Change of control triggering event
Long-Term:
Redemption price as a percentage of principal				101.00%
Other borrowings
Current:
Debt, Current				10,418,000	11,441,000
Lines of credit
Financing Arrangements
Maximum borrowing capacity				5,300,000,000
Amount outstanding under credit facilities				1,400,000,000
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
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
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
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
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

Financing_Arrangements_Details1

Financing Arrangements (Details 2) (1.5% Convertible Senior Notes due February 15, 2024, USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Feb. 15, 2009
1.5% Convertible Senior Notes due February 15, 2024
Financing Arrangements
Carrying value of the equity component	$19,516,000	$19,519,000
Principal amount and carrying value of the liability component	18,324,000	18,398,000
Debt instrument, coupon interest	300,000	300,000	300,000
Effective interest rate of convertible debt instrument (as a percent)				4.38%
If-converted value	$41,000,000

Financing_Arrangements_Details2

Financing Arrangements (Details 3) (Lines of credit, USD $)	Dec. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Lines of credit
Short-term credit facility
Outstanding borrowings under short-term facility	$10	$11

Other_Noncurrent_Liabilities_D

Other Noncurrent Liabilities (Details 99) (USD $)	Dec. 31, 2014	Dec. 31, 2013
Noncurrent liabilities and noncurrent assets
Marketable equity securities held in trust	$405,022,000	$388,408,000
Noncurrent liabilities
Noncurrent liabilities and noncurrent assets
Deferred compensation and retirement obligations included in noncurrent liabilities	428,000,000	415,000,000
Accrued retention amount related to insurance coverages	$27,000,000	$28,000,000

StockBased_Plans_Details

Stock-Based Plans (Details) (USD $)	12 Months Ended
In Millions, except Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Stock-Based Plans
Recorded compensation cost for stock based payment arrangements, net of tax	$45	$54	$40
Recognized tax benefits for stock based payment arrangements	27	32	24
Shares available for future grant under the various stock plans (in shares)	11,909,687
Restricted Stock or Restricted Stock Units
Restricted Stock or Restricted Stock Units activity
Outstanding as of beginning of year (in shares)	977,766	1,070,176	1,294,615
Granted (in shares)	370,014	482,959	450,668
Canceled (in shares)	-30,032	-11,104	-17,109
Vested (in shares)	-449,227	-564,265	-657,998
Outstanding as of end of year (in shares)	868,521	977,766	1,070,176
Outstanding as of beginning of year, weighted average grant date fair value (in dollars per share)	$57.36	$51.96	$44.33
Granted, weighted average grant date fair value (in dollars per share)	$79.06	$61.62	$61.70
Canceled, weighted average grant date fair value (in dollars per share)	$69.17	$62.35	$58.35
Vested, weighted average grant date fair value (in dollars per share)	$57.08	$50.65	$43.46
Outstanding as of end of year, weighted average grant date fair value (in dollars per share)	$66.35	$57.36	$51.96
Restricted Stock or Restricted Stock Units | Corporate general and administrative expense
Stock-based plans
Recognized compensation expense	31	28	25
Restricted stock units
Restricted Stock or Restricted Stock Units activity
Ratio of shares granted to available shares	0.44
Stock-based plans
Vesting period	3 years	3 years	3 years
Stock Options
Stock option activity
Outstanding as of beginning of year (in shares)	2,964,707	3,233,025	2,899,501
Granted (in shares)	684,486	884,574	688,380
Expired or canceled (in shares)	-58,215	-15,607	-45,164
Exercised (in shares)	-417,970	-1,137,285	-309,692
Outstanding as of end of year (in shares)	3,173,008	2,964,707	3,233,025
Outstanding as of beginning of year (in dollars per share)	$58.63	$53.64	$50
Granted (in dollars per share)	$79.19	$61.45	$62.18
Expired or canceled (in dollars per share)	$73.33	$65.46	$61.57
Exercised (in dollars per share)	$57.67	$46.53	$37.41
Outstanding as of end of year (in dollars per share)	$62.92	$58.63	$53.64
Options exercisable (in shares)	1,728,445
Options exercisable (in dollars per share)	$57.38
Remaining unvested options outstanding and expected to vest (in shares)	1,401,226
Remaining unvested options outstanding and expected to vest (in dollars per share)	$69.55
Stock-based plans
Total intrinsic value of stock options exercised	8	29	7
Balance of unamortized expense	6
Weighted average period of recognition of unamortized expense	1 year 1 month 6 days
Term of stock-based award	10 years
Vesting period	3 years	3 years	3 years
Fair value on the grant date and the significant assumptions used in the Black-Scholes option-pricing model
Weighted average grant date fair value (in dollars per share)	$23.04	$17.22
Expected life of options (in years)	5 years 9 months 18 days	4 years 6 months
Risk-free interest rate (as a percent)	1.80%	0.80%
Expected volatility (as a percent)	31.60%	35.80%
Expected annual dividend (in dollars per share)	$0.84	$0.64
Blend of historical and implied volatility	50.00%	50.00%
Stock Options | Corporate general and administrative expense
Stock-based plans
Recognized compensation expense	17	15	13
Restricted shares
Restricted Stock or Restricted Stock Units activity
Ratio of shares granted to available shares	0.44
Stock-based plans
Fair value of restricted stock vested	35	36	38
Balance of unamortized expense	15
Weighted average period of recognition of unamortized expense	1 year 3 months 18 days
Performance-based VDI units
Restricted Stock or Restricted Stock Units activity
Ratio of shares granted to available shares	0.44
Stock-based plans
Weighted average period of recognition of unamortized expense	1 year 10 months 24 days
Vesting period	3 years
Performance-based VDI units | Corporate general and administrative expense
Stock-based plans
Recognized compensation expense	$24	$43	$26

StockBased_Plans_Details_2

Stock-Based Plans (Details 2) (USD $)	12 Months Ended
In Millions, except Share data, unless otherwise specified	Dec. 31, 2014
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range
Number Outstanding (in shares)	3,173,008
Weighted Average Remaining Contractual Life	6 years 9 months 18 days
Weighted Average Exercise Price (in dollars per share)	$62.92
Options exercisable (in shares)	1,728,445
Weighted Average Remaining Contractual Life, Exercisable	5 years 4 months 24 days
Weighted Average Exercise Price Per Share (in dollars per share)	$57.38
Options outstanding, aggregate intrinsic value	$12
Options exercisable, aggregate intrinsic value	$12
$30.46 - $41.77
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range
Range of Exercise Prices, low end of range (in dollars per share)	$30.46
Range of Exercise Prices, high end of range (in dollars per share)	$41.77
Number Outstanding (in shares)	176,161
Weighted Average Remaining Contractual Life	4 years 2 months 12 days
Weighted Average Exercise Price (in dollars per share)	$30.46
Options exercisable (in shares)	176,161
Weighted Average Remaining Contractual Life, Exercisable	4 years 2 months 12 days
Weighted Average Exercise Price Per Share (in dollars per share)	$30.46
$42.11 - $62.50
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range
Range of Exercise Prices, low end of range (in dollars per share)	$42.11
Range of Exercise Prices, high end of range (in dollars per share)	$62.50
Number Outstanding (in shares)	1,713,173
Weighted Average Remaining Contractual Life	6 years 9 months 18 days
Weighted Average Exercise Price (in dollars per share)	$57.50
Options exercisable (in shares)	919,859
Weighted Average Remaining Contractual Life, Exercisable	6 years
Weighted Average Exercise Price Per Share (in dollars per share)	$53.93
$68.36 - $80.12
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range
Range of Exercise Prices, low end of range (in dollars per share)	$68.36
Range of Exercise Prices, high end of range (in dollars per share)	$80.12
Number Outstanding (in shares)	1,283,674
Weighted Average Remaining Contractual Life	7 years 1 month 6 days
Weighted Average Exercise Price (in dollars per share)	$74.61
Options exercisable (in shares)	632,425
Weighted Average Remaining Contractual Life, Exercisable	5 years 1 month 6 days
Weighted Average Exercise Price Per Share (in dollars per share)	$69.90

StockBased_Plans_Details_3

Stock-Based Plans (Details 3) (Performance-based VDI units, USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Performance-based VDI units
Vesting period	3 years
Performance-based liabilities paid during year	$21
Unamortized compensation expense	15
Weighted average period of recognition of unamortized expense	1 year 10 months 24 days
Corporate general and administrative expense
Performance-based VDI units
Recognized compensation expense	$24	$43	$26

Earnings_Per_Share_Details

Earnings Per Share (Details) (USD $)	3 Months Ended								12 Months Ended
In Thousands, except Share data, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Feb. 29, 2004
Amounts attributable to Fluor Corporation:
Earnings from continuing operations									$715,460	$667,711	$456,330
Loss from discontinued operations, net of tax									-204,551
Net earnings attributable to Fluor Corporation	214,500	69,500	77,800	149,100	166,800	173,000	161,400	166,500	510,909	667,711	456,330
Basic EPS attributable to Fluor Corporation:
Weighted average common shares outstanding (in shares)									157,487,000	162,566,000	167,121,000
Earnings from continuing operations (in dollars per share)	$1.43	$1.17	$1.03	$0.93	$1.03	$1.06	$0.99	$1.02	$4.54	$4.11	$2.73
Loss from discontinued operations, net of taxes (in dollars per share)	($0.04)	($0.73)	($0.54)						($1.30)
Net earnings (in dollars per share)	$1.39	$0.44	$0.49	$0.93	$1.03	$1.06	$0.99	$1.02	$3.24	$4.11	$2.73
Diluted EPS attributable to Fluor Corporation:
Weighted average common shares outstanding (in shares)									157,487,000	162,566,000	167,121,000
Diluted effect:
Employee stock options, restricted stock units and shares and Value Driver Incentive units (in shares)									1,719,000	1,383,000	1,024,000
Conversion equivalent of dilutive convertible debt (in shares)									410,000	405,000	346,000
Weighted average diluted shares outstanding (in shares)									159,616,000	164,354,000	168,491,000
Diluted EPS attributable to Fluor Corporation
Earnings from continuing operations (in dollars per share)	$1.41	$1.15	$1.02	$0.92	$1.01	$1.05	$0.98	$1.02	$4.48	$4.06	$2.71
Loss from discontinued operations, net of taxes (in dollars per share)	($0.04)	($0.71)	($0.54)						($1.28)
Net earnings (in dollars per share)	$1.37	$0.44	$0.48	$0.92	$1.01	$1.05	$0.98	$1.02	$3.20	$4.06	$2.71
Anti-dilutive securities not included above (in shares)									769,000	1,436,000	1,557,000
Repurchases of common stock
Common stock repurchased and cancelled, shares (in shares)									13,331,402	2,591,557	7,409,200
Common stock repurchased and cancelled, amount (in dollars)									$906,083	$200,052	$389,233
1.5% Convertible Senior Notes due February 15, 2024
Debt instruments
Debt Instrument, Interest Rate, Stated Percentage	1.50%				1.50%				1.50%	1.50%	1.50%	1.50%

Lease_Obligations_Details

Lease Obligations (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Lease Obligations
Net rental expense	$218,000,000	$206,000,000	$181,000,000
Obligations for minimum rentals under non-cancelable operating leases
2015	48,800,000
2016	47,100,000
2017	38,400,000
2018	28,600,000
2019	23,200,000
Thereafter	$49,600,000

Noncontrolling_Interests_Detai

Noncontrolling Interests (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Noncontrolling Interests.
Net earnings attributable to noncontrolling interests	$136,634	$155,315	$114,737
Distributions paid to noncontrolling interest holders	138,041	124,853	100,623
Capital contribution from noncontrolling interests	$3,336	$1,697	$2,665

Contingencies_and_Commitments_

Contingencies and Commitments (Details) (St. Joe and Doe Run, USD $)	12 Months Ended	1 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Jul. 31, 2011	Jan. 31, 2015	Jun. 30, 2014	Oct. 31, 2014
		item			plaintiff
Litigation and dispute resolution
After-tax loss from discontinued operations as a result of updated assessment of estimated loss contingency	$205
St. Joe and Doe Run December 2010 litigation
Litigation and dispute resolution
Number of plaintiffs		16
Compensatory and economic damages		38.5
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			$300
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 $)	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Recognized claims against clients
Contracts receivable, claims and uncertain amounts	$21,000,000	$0	$20,000,000
Performance Guarantee
Guarantees
Estimated performance guarantees outstanding	$17,700,000,000

Variable_Interest_Entities_Det

Variable Interest Entities (Details) (USD $)	3 Months Ended								12 Months Ended			1 Months Ended		12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Aug. 31, 2012	Aug. 31, 2010	Dec. 31, 2008
Variable interest entity information
Revenue	$5,455,200,000	$5,440,100,000	$5,251,700,000	$5,384,600,000	$6,291,500,000	$6,684,200,000	$7,190,300,000	$7,185,600,000	$21,531,577,000	$27,351,573,000	$27,577,135,000
Interstate 95 HOT Lanes Project
Variable interest entity information
Project amount												925,000,000
Eagle P3 Commuter Rail Project
Variable interest entity information
Project amount													1,700,000,000
Partnership | Majority
Variable interest entity information
Entity's interest in joint venture (as a percent)	50.00%								50.00%
Joint ventures | Majority
Variable interest entity information
Entity's interest in joint venture (as a percent)	50.00%								50.00%
95 Express Lanes, LLC
Variable interest entity information
Entity's interest in joint venture (as a percent)												10.00%
Fluor-Lane 95 construction joint venture
Variable interest entity information
Entity's interest in joint venture (as a percent)									65.00%
Denver Transit Holdings LLC
Variable interest entity information
Entity's interest in joint venture (as a percent)													10.00%
Denver Transit Systems
Variable interest entity information
Entity's interest in joint venture (as a percent)									50.00%
Denver Transit Constructors
Variable interest entity information
Entity's interest in joint venture (as a percent)									40.00%
Transurban (USA) Inc. | Interstate 95 HOT Lanes Project
Variable interest entity information
Concession agreement period												75 years
Transurban (USA) Inc. | 95 Express Lanes, LLC
Variable interest entity information
Entity's interest in joint venture (as a percent)												90.00%
Lane Construction | Fluor-Lane 95 construction joint venture
Variable interest entity information
Entity's interest in joint venture (as a percent)									35.00%
Additional partners | Denver Transit Holdings LLC
Variable interest entity information
Entity's interest in joint venture (as a percent)													45.00%
Number of third party partners in the VIE													2
RTD | Eagle P3 Commuter Rail Project | Private activity bonds
Variable interest entity information
Debt issued for funding to VIE													398,000,000
Denver Transit Partners | Eagle P3 Commuter Rail Project
Variable interest entity information
Concession agreement period													35 years
Fluor Australia Pty Ltd | Fluor SKM joint venture
Variable interest entity information
Entity's interest in joint venture (as a percent)														55.00%
Sinclair Knight Merz | Fluor SKM joint venture
Variable interest entity information
Entity's interest in joint venture (as a percent)														45.00%
Unconsolidated variable interest entities
Variable interest entity information
Carrying value of the unconsolidated VIEs	107,000,000				122,000,000				107,000,000	122,000,000
Unconsolidated variable interest entities | Future funding commitment
Variable interest entity information
Future funding amount	20,000,000								20,000,000
Consolidated variable interest entities
Variable interest entity information
Carrying value of assets	891,000,000				1,200,000,000				891,000,000	1,200,000,000
Carrying value of liabilities	442,000,000				731,000,000				442,000,000	731,000,000
Primary beneficiary | Fluor-Lane 95 construction joint venture
Variable interest entity information
Carrying value of assets	82,000,000				119,000,000				82,000,000	119,000,000
Carrying value of liabilities	64,000,000				115,000,000				64,000,000	115,000,000
Primary beneficiary | Denver Transit Systems and Denver Transit Constructors
Variable interest entity information
Carrying value of assets	108,000,000				150,000,000				108,000,000	150,000,000
Carrying value of liabilities	49,000,000				72,000,000				49,000,000	72,000,000
Primary beneficiary | Fluor SKM joint venture
Variable interest entity information
Revenue									437,000,000	1,800,000,000	3,400,000,000
Carrying value of assets	24,000,000				62,000,000				24,000,000	62,000,000
Carrying value of liabilities	26,000,000				83,000,000				26,000,000	83,000,000
Not primary beneficiary | Denver Transit Holdings LLC
Variable interest entity information
Investment balance	1,000,000								1,000,000
Not primary beneficiary | Denver Transit Holdings LLC | Minimum | Future funding commitment
Variable interest entity information
Future funding amount	$5,000,000								$5,000,000

Operations_by_Business_Segment2

Operations by Business Segment and Geographic Area (Details) (USD $)	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
									segment
Operations by Business Segment and Geographical Area
Number of business segments									5
Operating information by segment
Total external revenue	$5,455,200,000	$5,440,100,000	$5,251,700,000	$5,384,600,000	$6,291,500,000	$6,684,200,000	$7,190,300,000	$7,185,600,000	$21,531,577,000	$27,351,573,000	$27,577,135,000
Depreciation and amortization of fixed assets									191,701,000	206,331,000	210,441,000
Total capital expenditures									324,704,000	288,487,000	254,747,000
Total assets	8,194,429,000				8,323,850,000				8,194,429,000	8,323,850,000
Goodwill	112,952,000				114,107,000				112,952,000	114,107,000
Oil and Gas Segment
Operating information by segment
Total external revenue									11,368,900,000	11,519,800,000	9,513,900,000
Goodwill	7,100,000				7,100,000				7,100,000	7,100,000
Oil and Gas Segment | Customer concentration | Consolidated revenue | Single customer
Operating information by segment
Percentage of the entity's consolidated revenue from customer									15.00%	12.00%	11.00%
Industrial and Infrastructure Segment
Operating information by segment
Total external revenue									6,061,700,000	11,081,700,000	13,237,800,000
Goodwill	16,900,000				18,600,000				16,900,000	18,600,000
Industrial and Infrastructure Segment | Customer concentration | Consolidated revenue | Single customer
Operating information by segment
Percentage of the entity's consolidated revenue from customer											13.00%
Government Segment
Operating information by segment
Total external revenue									2,511,900,000	2,749,100,000	3,304,700,000
Goodwill	58,000,000				57,500,000				58,000,000	57,500,000
Government Segment | Customer concentration | Consolidated revenue | Various agencies of the U.S. government
Operating information by segment
Percentage of the entity's consolidated revenue from customer									11.00%	10.00%	12.00%
Global Services Segment
Operating information by segment
Total external revenue									585,000,000	611,800,000	679,600,000
Goodwill	20,400,000				20,300,000				20,400,000	20,300,000
Power Segment
Operating information by segment
Total external revenue									1,004,100,000	1,389,200,000	841,100,000
Goodwill	10,600,000				10,600,000				10,600,000	10,600,000
Reportable segments
Operating information by segment
Total segment profit (loss)									1,262,400,000	1,209,900,000	769,400,000
Reportable segments | Oil and Gas Segment
Operating information by segment
Total segment profit (loss)									673,400,000	441,100,000	334,700,000
Total assets	1,708,200,000				1,643,800,000				1,708,200,000	1,643,800,000
Reportable segments | Industrial and Infrastructure Segment
Operating information by segment
Total segment profit (loss)									391,200,000	476,000,000	176,500,000
Depreciation and amortization of fixed assets									2,600,000	1,500,000	2,400,000
Total capital expenditures									8,300,000	2,900,000	500,000
Total assets	871,900,000				909,700,000				871,900,000	909,700,000
Additional operating information by segment
Pre-tax gain on sale of unconsolidated interest											43,000,000
Reportable segments | Industrial and Infrastructure Segment | Greater Gabbard Offshore Wind Farm Project
Additional operating information by segment
Project charges											416,000,000
Reportable segments | Government Segment
Operating information by segment
Total segment profit (loss)									92,700,000	161,400,000	149,700,000
Depreciation and amortization of fixed assets									5,400,000	9,500,000	12,900,000
Total capital expenditures									2,200,000	4,100,000	5,700,000
Total assets	540,100,000				580,600,000				540,100,000	580,600,000
Reportable segments | Government Segment | Favorable resolution of various issues with U.S. government related to 2001-2013
Additional operating information by segment
Income recognized										57,000,000
Reportable segments | Government Segment | Resolution of U.S. government challenges as to reimbursability of certain costs
Additional operating information by segment
Income recognized										31,000,000
Reportable segments | Government Segment | Favorable court ruling that resolved certain U.S. government disputed items
Additional operating information by segment
Income recognized										11,000,000
Reportable segments | Government Segment | Closeout and final disposition of other U.S. government matters
Additional operating information by segment
Income recognized										15,000,000
Reportable segments | Global Services Segment
Operating information by segment
Total segment profit (loss)									73,800,000	119,700,000	125,400,000
Depreciation and amortization of fixed assets									111,800,000	117,700,000	124,600,000
Total capital expenditures									224,000,000	145,300,000	184,500,000
Total assets	795,300,000				758,900,000				795,300,000	758,900,000
Reportable segments | Power Segment
Operating information by segment
Total segment profit (loss)									31,300,000	11,700,000	-16,900,000
Depreciation and amortization of fixed assets									1,600,000	1,100,000	900,000
Total capital expenditures									2,100,000	1,300,000	3,600,000
Total assets	178,600,000				154,900,000				178,600,000	154,900,000
Reportable segments | Power Segment | Nu Scale Power
Additional operating information by segment
Research and development expense									46,000,000	53,000,000	63,000,000
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 expenses reimbursed									38,000,000
Corporate and other
Operating information by segment
Depreciation and amortization of fixed assets									70,300,000	76,500,000	69,600,000
Total capital expenditures									88,100,000	134,900,000	60,400,000
Total assets	4,100,300,000				4,276,000,000				4,100,300,000	4,276,000,000
Intercompany | Global Services Segment
Operating information by segment
Total external revenue									$531,000,000	$505,000,000	$462,000,000

Operations_by_Business_Segment3

Operations by Business Segment and Geographic Area (Details 2) (USD $)	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Reconciliation of total segment profit to earnings before taxes
Corporate general and administrative expense									($182,711,000)	($175,148,000)	($151,010,000)
Interest income (expense), net									-11,400,000	-12,500,000	-500,000
EARNINGS FROM CONTINUING OPERATIONS BEFORE TAXES	304,700,000	343,400,000	285,300,000	271,500,000	267,900,000	304,700,000	298,700,000	306,300,000	1,204,909,000	1,177,599,000	733,505,000
Reportable segments
Reconciliation of total segment profit to earnings before taxes
Total segment profit									1,262,400,000	1,209,900,000	769,400,000
Reconciling item | Noncontrolling Interests
Reconciliation of total segment profit to earnings before taxes
EARNINGS FROM CONTINUING OPERATIONS BEFORE TAXES									$136,600,000	$155,300,000	$115,600,000

Operations_by_Business_Segment4

Operations by Business Segment and Geographic Area (Details 3) (USD $)	3 Months Ended								12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Revenues from external customers and long lived assets
Revenues	$5,455,200	$5,440,100	$5,251,700	$5,384,600	$6,291,500	$6,684,200	$7,190,300	$7,185,600	$21,531,577	$27,351,573	$27,577,135
Assets	8,194,429				8,323,850				8,194,429	8,323,850
United States
Revenues from external customers and long lived assets
Revenues									7,466,200	7,295,000	7,021,400
Assets	4,598,400				4,329,400				4,598,400	4,329,400
Canada
Revenues from external customers and long lived assets
Revenues									4,133,300	6,275,800	5,371,900
Assets	900,400				927,800				900,400	927,800
Asia Pacific (includes Australia)
Revenues from external customers and long lived assets
Revenues									2,568,000	4,503,400	6,349,700
Assets	724,700				791,400				724,700	791,400
Europe
Revenues from external customers and long lived assets
Revenues									2,070,100	2,096,300	1,632,900
Assets	1,178,000				1,150,400				1,178,000	1,150,400
Central and South America
Revenues from external customers and long lived assets
Revenues									2,494,800	3,509,700	3,526,500
Assets	371,700				657,800				371,700	657,800
Middle East and Africa
Revenues from external customers and long lived assets
Revenues									2,799,200	3,671,400	3,674,700
Assets	$421,200				$467,100				$421,200	$467,100

Operations_by_Business_Segment5

Operations by Business Segment and Geographic Area (Details 4) (Corporate general and administrative expense, USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Corporate general and administrative expense
Non-Operating Expense
Non-operating expense items	$0	$2	$12

Quarterly_Financial_Data_Unaud2

Quarterly Financial Data (Unaudited) (Details) (USD $)	3 Months Ended								12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Quarterly results of operations
Revenue	$5,455,200	$5,440,100	$5,251,700	$5,384,600	$6,291,500	$6,684,200	$7,190,300	$7,185,600	$21,531,577	$27,351,573	$27,577,135
Cost of revenue	5,093,800	5,060,000	4,906,400	5,072,300	5,955,400	6,329,700	6,857,500	6,843,800	20,132,544	25,986,382	26,692,138
Earnings from continuing operations before taxes	304,700	343,400	285,300	271,500	267,900	304,700	298,700	306,300	1,204,909	1,177,599	733,505
Earnings from continuing operations	234,900	228,700	195,200	193,300	185,000	217,400	207,300	213,300	852,094	823,026	571,067
Loss from discontinued operations, net of taxes	-5,600	-113,800	-85,200						-204,551
Net earnings	229,300	114,900	110,000	193,300	185,000	217,400	207,300	213,300	647,543	823,026	571,067
Net earnings attributable to Fluor Corporation	$214,500	$69,500	$77,800	$149,100	$166,800	$173,000	$161,400	$166,500	$510,909	$667,711	$456,330
BASIC EARNINGS (LOSS) PER SHARE ATTRIBUTABLE TO FLUOR CORPORATION
Earnings from continuing operations (in dollars per share)	$1.43	$1.17	$1.03	$0.93	$1.03	$1.06	$0.99	$1.02	$4.54	$4.11	$2.73
Loss from discontinued operations, net of taxes (in dollars per share)	($0.04)	($0.73)	($0.54)						($1.30)
Net earnings (in dollars per share)	$1.39	$0.44	$0.49	$0.93	$1.03	$1.06	$0.99	$1.02	$3.24	$4.11	$2.73
DILUTED EARNINGS (LOSS) PER SHARE ATTRIBUTABLE TO FLUOR CORPORATION
Earnings from continuing operations (in dollars per share)	$1.41	$1.15	$1.02	$0.92	$1.01	$1.05	$0.98	$1.02	$4.48	$4.06	$2.71
Loss from discontinued operations, net of taxes (in dollars per share)	($0.04)	($0.71)	($0.54)						($1.28)
Net earnings (in dollars per share)	$1.37	$0.44	$0.48	$0.92	$1.01	$1.05	$0.98	$1.02	$3.20	$4.06	$2.71

Quarterly_Financial_Data_Unaud3

Quarterly Financial Data (Unaudited) (Details 2) (USD $)	3 Months Ended
In Millions, except Per Share data, unless otherwise specified	Dec. 31, 2013
Favorable resolution of various issues with U.S. government related to 2001-2013
Effect of fourth quarter events
Fourth quarter pre-tax income (charges)	$57
Fourth quarter pre-tax income (charges) per diluted share (in dollars per share)	$0.22
Resolution of U.S. government challenges as to reimbursability of certain costs
Effect of fourth quarter events
Fourth quarter pre-tax income (charges)	31
Favorable court ruling that resolved certain U.S. government disputed items
Effect of fourth quarter events
Fourth quarter pre-tax income (charges)	11
Closeout and final disposition of other U.S. government matters
Effect of fourth quarter events
Fourth quarter pre-tax income (charges)	$15