Atlantica Sustainable Infrastructure (AY) 6-K 10 May 19 2019 Q1 Current report (foreign) Financial data

Document and Entity Information

Document and Entity Information	3 Months Ended
	Mar. 31, 2019
Document and Entity Information [Abstract]
Entity Registrant Name	Atlantica Yield plc
Entity Central Index Key	0001601072
Current Fiscal Year End Date	--12-31
Document Type	6-K
Amendment Flag	false
Document Period End Date	Mar. 31, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q1

Consolidated condensed statemen

Consolidated condensed statements of financial position - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Non-current assets
Contracted concessional assets	$ 8,389,508	$ 8,549,181
Investments carried under the equity method	54,777	53,419
Financial investments	65,386	52,670
Deferred tax assets	152,205	136,066
Total non-current assets	8,661,876	8,791,336
Current assets
Inventories	18,912	18,924
Trade and other receivables	241,412	236,395
Financial investments	243,025	240,834
Cash and cash equivalents	654,618	631,542
Total current assets	1,157,967	1,127,695
Total assets	9,819,843	9,919,031
Equity attributable to the Company
Share capital	10,022	10,022
Parent company reserves	1,992,859	2,029,940
Other reserves	71,040	95,011
Accumulated currency translation differences	(89,016)	(68,315)
Retained earnings	(456,549)	(449,274)
Non-controlling interest	136,647	138,728
Total equity	1,665,003	1,756,112
Non-current liabilities
Long-term corporate debt	423,921	415,168
Long-term project debt	4,769,119	4,826,659
Grants and other liabilities	1,653,323	1,658,126
Related parties	28,434	33,675
Derivative liabilities	305,138	279,152
Deferred tax liabilities	227,261	211,000
Total non-current liabilities	7,407,196	7,423,780
Current liabilities
Short-term corporate debt	273,624	268,905
Short-term project debt	307,233	264,455
Trade payables and other current liabilities	151,463	192,033
Income and other tax payables	15,324	13,746
Total current liabilities	747,644	739,139
Total equity and liabilities	$ 9,819,843	$ 9,919,031

Consolidated condensed income s

Consolidated condensed income statements - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Consolidated income statements [Abstract]
Revenue	$ 221,452	$ 225,265
Other operating income	26,439	28,414
Raw materials and consumables used	(2,913)	(4,420)
Employee benefit expenses	(5,316)	(5,097)
Depreciation, amortization, and impairment charges	(75,736)	(74,624)
Other operating expenses	(60,573)	(66,194)
Operating profit	103,353	103,344
Financial income	286	296
Financial expense	(101,503)	(100,067)
Net exchange differences	866	(180)
Other financial income/(expense), net	1,062	(1,660)
Financial expense, net	(99,289)	(101,611)
Share of profit/(loss) of associates carried under the equity method	1,823	1,407
Profit/(loss) before income tax	5,887	3,140
Income tax	(9,577)	(4,650)
Profit/(loss) for the period	(3,690)	(1,510)
Loss/(profit) attributable to non-controlling interests	(5,267)	(3,254)
Profit/(loss) for the period attributable to the Company	$ (8,957)	$ (4,764)
Weighted average number of ordinary shares outstanding (in shares)	100,217	100,217
Basic and diluted earnings per share (in dollars per share)	$ (0.09)	$ (0.05)

Consolidated condensed statem_2

Consolidated condensed statements of comprehensive income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Consolidated statements of comprehensive income [Abstract]
Profit/(loss) for the period	$ (3,690)	$ (1,510)
Items that may be subject to transfer to income statement
Change in fair value of cash flow hedges	(48,764)	1,136
Currency translation differences	(22,975)	30,302
Tax effect	12,234	(1,692)
Net income/(expenses) recognized directly in equity	(59,505)	29,746
Cash flow hedges	14,146	17,335
Tax effect	(3,537)	(4,334)
Transfers to income statement	10,609	13,001
Other comprehensive income/(loss)	(48,896)	42,747
Total comprehensive income/(loss) for the period	(52,586)	41,237
Total comprehensive (income)/loss attributable to non-controlling interest	639	(4,486)
Total comprehensive income/(loss) attributable to the Company	$ (51,947)	$ 36,751

Consolidated condensed statem_3

Consolidated condensed statements of changes in equity - USD ($) $ in Thousands	Total	Total Equity Attributable to Company [Member]	Share Capital [Member]	Parent Company Reserves [Member]	Other Reserves [Member]	Retained Earnings [Member]	Accumulated Currency Translation Differences [Member]	Non-controlling Interest [Member]
Balance, beginning of period at Dec. 31, 2017	$ 1,884,967	$ 1,748,372	$ 10,022	$ 2,163,229	$ 82,294	$ (489,026)	$ (18,147)	$ 136,595
Profit/(loss) for the three-month period after taxes	(1,510)	(4,764)	0	0	0	(4,764)	0	3,254
Change in fair value of cash flow hedges	18,471	20,386	0	0	20,386	0	0	(1,915)
Currency translation differences	30,302	27,668	0	0	0	0	27,668	2,634
Tax effect	(6,026)	(6,539)	0	0	(6,539)	0	0	513
Other comprehensive income/(loss)	42,747	41,515	0	0	13,847	0	27,668	1,232
Total comprehensive income/(loss) for the period	41,237	36,751	0	0	13,847	(4,764)	27,668	4,486
Dividend distribution	(31,068)	(31,068)	0	(31,068)	0	0	0	0
Balance, end of period at Mar. 31, 2018	1,895,136	1,754,055	10,022	2,132,161	96,141	(493,790)	9,521	141,081
Balance, beginning of period at Dec. 31, 2018	1,756,112	1,617,384	10,022	2,029,940	95,011	(449,274)	(68,315)	138,728
Profit/(loss) for the three-month period after taxes	(3,690)	(8,957)	0	0	0	(8,957)	0	5,267
Change in fair value of cash flow hedges	(34,618)	(30,302)	0	0	(31,984)	1,682	0	(4,316)
Currency translation differences	(22,975)	(20,701)	0	0	0	0	(20,701)	(2,274)
Tax effect	8,697	8,013	0	0	8,013	0	0	684
Other comprehensive income/(loss)	(48,896)	(42,990)	0	0	(23,971)	1,682	(20,701)	(5,906)
Total comprehensive income/(loss) for the period	(52,586)	(51,947)	0	0	(23,971)	(7,275)	(20,701)	(639)
Capital reduction	(1,442)	0	0	0	0	0	0	(1,442)
Dividend distribution	(37,081)	(37,081)	0	(37,081)	0	0	0	0
Balance, end of period at Mar. 31, 2019	$ 1,665,003	$ 1,528,356	$ 10,022	$ 1,992,859	$ 71,040	$ (456,549)	$ (89,016)	$ 136,647

Consolidated condensed cash flo

Consolidated condensed cash flow statements - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2019	Mar. 31, 2018
Consolidated cash flow statements [Abstract]
Profit/(loss) for the period		$ (3,690)	$ (1,510)
Financial expense and non-monetary adjustments		169,013	170,459
II. Profit for the period adjusted by financial expense and non-monetary adjustments		165,323	168,949
III. Variations in working capital		(54,509)	(11,654)
Net interest and income tax paid		(13,925)	(26,760)
A. Net cash provided by operating activities		96,889	130,535
Investments in contracted concessional assets	[1]	7,186	60,512
Other non-current assets/liabilities		(26,985)	(5,118)
Acquisitions of subsidiaries and other financial instruments		(2,457)	(7,854)
B. Net cash provided by/(used in) investing activities		(22,256)	47,540
Proceeds from Project & Corporate debt		15,000	0
Repayment of Project & Corporate debt		(22,574)	(70,147)
Dividends paid to Company's shareholders		(37,080)	(31,068)
C. Net cash provided by/(used in) financing activities		(44,654)	(101,215)
Net increase/(decrease) in cash and cash equivalents		29,979	76,860
Cash and cash equivalents at beginning of the period		631,542	669,387
Translation differences in cash or cash equivalent		(6,903)	9,655
Cash and cash equivalents at end of the period		$ 654,618	$ 755,902
[1]	Includes proceeds for $7.4 million and $60.8 million for the three-month period ended March 31, 2019 and March 31, 2018 respectively, related to the amounts received from Abengoa by Solana further to Abengoa's obligation as EPC Contractor. For further details, we refer to the Note 10 of the Company's consolidated financial statements for the year ended December 31, 2018 included in the 2018 20-F.

Consolidated condensed cash f_2

Consolidated condensed cash flow statements (Parenthetical) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Consolidated cash flow statements [Abstract]
Proceeds from investments in contracted concessional assets	$ 7.4	$ 60.8

Nature of the business

Nature of the business	3 Months Ended
	Mar. 31, 2019
Nature of the business [Abstract]
Nature of the business	Note 1. - Nature of the business Atlantica Yield plc (“Atlantica” or the “Company”) was incorporated in England and Wales as a private limited company on December 17, 2013 under the name Abengoa Yield Limited. On March 19, 2014, the Company was re-registered as a public limited company, under the name Abengoa Yield plc. On May 13, 2016, the change of the Company´s registered name to Atlantica Yield plc was filed with the Registrar of Companies in the United Kingdom. Atlantica is a sustainable total return infrastructure company that owns, manages and acquires renewable energy, efficient natural gas, electric transmission lines and water assets focused on North America (the United States and Mexico), South America (Peru, Chile and Uruguay) and EMEA (Spain, Algeria and South Africa). Atlantica’s shares began trading on the NASDAQ Global Select Market under the symbol “ABY” on June 13, 2014. The symbol changed to “AY” on November 11, 2017. On March 9, 2018 and on November 27, 2018, Algonquin Power & Utilities (“Algonquin”) announced that it completed the acquisition from Abengoa S.A, (“Abengoa”) of a 25% and 16.47% equity interest in Atlantica, respectively. Algonquin is the largest shareholder of the Company which currently owns a 41.47% stake in Atlantica Yield. Algonquin does not consolidate the Company in its consolidated financial statements. During the year 2018, the Company completed the following acquisitions: - On February 28, 2018, the Company closed the acquisition of a 100% stake in a 4 MW hydroelectric power plant in Peru (“Mini-Hydro”) for approximately $9 million; - On December 11, 2018, the Company closed the acquisition of a 66kV transmission line in operation in Chile (“Chile TL3”) for approximately $6 million; - On October 10, 2018, the Company completed the acquisition of a 5% stake in a natural gas transportation in Mexico (Pemex Transportation System or “PTS”). Consideration for this 5% stake, which amounts to approximately $7 million, will be disbursed progressively as construction progresses; - On December 14, 2018, the Company closed the acquisition of a 100% stake in a 50 MW on-shore wind plant in Uruguay (“Melowind”) for approximately $45 million; - On December 28, 2018, the Company completed the acquisition of a transmission line, which is an extension of ATN (“ATN expansion 1”) for approximately $16 million. On January 29, 2019, the Company entered into an agreement with Abengoa under the Right of First Offer (“ROFO”) Agreement for the acquisition of Befesa Agua Tenés, S.L.U., a holding company which in turn owns a 51% stake in are These dividends would be guaranteed by a right of usufruct over the economic rights and certain political rights and a pledge over the shares of Befesa Agua Tenés, S.L.U., granted by Abengoa to the Company. The following table provides an overview of the concessional assets the Company owned as of March 31, 2019: Assets Type Ownership Location Currency (8) Capacity (Gross) Counterparty Credit Ratings (9) COD* Contract Years Left (13) Solana Renewable (Solar) 100% Class B (1) Arizona (USA) USD 280 MW A-/A2/A- 2013 25 Mojave Renewable (Solar) 100 % California (USA) USD 280 MW D/WR/WD 2014 21 Solaben 2 & 3 Renewable (Solar) 70 % (2) Spain Euro 2x50 MW A-/Baa1/A- 2012 19/18 Solacor 1 & 2 Renewable (Solar) 87 % (3) Spain Euro 2x50 MW A-/Baa1/A- 2012 18/18 PS10/PS20 Renewable (Solar) 100 % Spain Euro 31 MW A-/Baa1/A- 2007&2009 13/15 Helioenergy 1 & 2 Renewable (Solar) 100 % Spain Euro 2x50 MW A-/Baa1/A- 2011 18/18 Helios 1 & 2 Renewable (Solar) 100 % Spain Euro 2x50 MW A-/Baa1/A- 2012 19/19 Solnova 1, 3 & 4 Renewable (Solar) 100 % Spain Euro 3x50 MW A-/Baa1/A- 2010 16/16/17 Solaben 1 & 6 Renewable (Solar) 100 % Spain Euro 2x50 MW A-/Baa1/A- 2013 20/20 Kaxu Renewable (Solar) 51 % (4) South Africa Rand 100 MW BB/Baa3/ BB+ (10) 2015 16 Palmatir Renewable (Wind) 100 % Uruguay USD 50 MW BBB/Baa2/BBB- (11) 2014 15 Cadonal Renewable (Wind) 100 % Uruguay USD 50 MW BBB/Baa2/BBB- (11) 2014 16 Melowind Renewable (Wind) 100 % Uruguay USD 50MW BBB/Baa2/BBB- 2015 17 Mini-Hydro Renewable (Hydraulic) 100 % Peru USD 4 MW BBB+/A3/ BBB+ 2012 14 ACT Efficient natural gas 100 % Mexico USD 300 MW BBB+/ Baa3/BBB- 2013 14 ATN (12) Transmission line 100 % Peru USD 365 miles BBB+/A3/BBB+ 2011 22 ATS Transmission line 100 Peru USD 569 miles BBB+/A3/BBB+ 2014 25 ATN 2 Transmission line 100 Peru USD 81 miles Not rated 2015 14 Quadra 1 Transmission line 100 % Chile USD 49 miles Not rated 2014 16 Quadra 2 Transmission line 100 % Chile USD 32 miles Not rated 2014 16 Palmucho Transmission line 100 % Chile USD 6 miles BBB+/Baa1/ BBB+ 2007 19 Chile TL3 Transmission line 100 % Chile USD 50 miles A+/A1/A+ 1993 Regulated Skikda Water 34.2 % (5) Algeria USD 3.5 M ft3/day Not rated 2009 15 Honaine Water 25.5 % (6) Algeria USD 7 M ft3/ day Not rated 2012 19 Seville PV Renewable (Solar) 80 % (7) Spain Euro 1 MW A-/Baa1/A- 2006 17 (1) On September 30, 2013, Liberty Interactive Corporation agreed to invest $300 million in Class A shares of ASO Holdings Company LLC, the holding company of Solana, in exchange for a share of the dividends and the taxable losses generated by Solana. (2) Itochu Corporation, a Japanese trading company, holds 30% of the shares in each of Solaben 2 and Solaben 3. (3) JGC, a Japanese engineering company, holds 13% of the shares in each of Solacor 1 and Solacor 2. (4) Kaxu is owned by the Company (51%), Industrial Development Corporation of South Africa (29%) and Kaxu Community Trust (20%). (5) Algerian Energy Company, SPA owns 49% of Skikda and Sacyr Agua, S.L. owns the remaining 16.83%. (6) Algerian Energy Company, SPA owns 49% of Honaine and Sacyr Agua, S.L. owns the remaining 25.5%. (7) Instituto para la Diversificación y Ahorro de la Energía (“Idae”), a Spanish state owned company, holds 20% of the shares in Seville PV. (8) Certain contracts denominated in U.S. dollars are payable in local currency. (9) Reflects the counterparty’s credit ratings issued by Standard & Poor’s Ratings Services, or S&P, Moody’s Investors Service Inc., or Moody’s, and Fitch Ratings Ltd, or Fitch. (10) Refers to the credit rating of the Republic of South Africa. The offtaker is Eskom, which is a state-owned utility company in South Africa. (11) Refers to the credit rating of Uruguay, as UTE (Administración Nacional de Usinas y Transmisoras Eléctricas) is unrated. (12) Including the acquisition of ATN expansion 1. (13) As of December 31, 2018. (*) Commercial Operation Date. The project financing arrangement of Kaxu contains cross-default provisions related to Abengoa such that debt defaults by Abengoa, subject to certain threshold amounts and/or a restructuring process, could trigger a default under the Kaxu project financing arrangement. In March 2017, Atlantica obtained a waiver in its Kaxu project financing arrangement which waives any potential cross-defaults with Abengoa up to that date, but it does not cover potential future cross-default events. As of March 31, 2019, there are no cross-default events with Abengoa.

Basis of preparation

Basis of preparation	3 Months Ended
	Mar. 31, 2019
Basis of preparation [Abstract]
Basis of preparation	Note 2. - Basis of preparation The accompanying consolidated condensed interim financial statements represent the consolidated results of the Company and its subsidiaries. The company´s annual consolidated financial statements as of December 31, 2018, were approved by the Board of Directors on February 26, 2019. These consolidated condensed interim financial statements are presented in accordance with International Accounting Standards (“IAS”) 34, “Interim Financial Reporting”. In accordance with IAS 34, interim financial information is prepared solely in order to update the most recent annual consolidated financial statements prepared by the Company, placing emphasis on new activities, occurrences and circumstances that have taken place during the three-month period ended March 31, 2019 and not duplicating the information previously published in the annual consolidated financial statements for the year ended December 31, 2018. Therefore, the consolidated condensed interim financial statements do not include all the information that would be required in a complete set of consolidated financial statements prepared in accordance with the IFRS-IASB (“International Financial Reporting Standards-International Accounting Standards Board”). In view of the above, for an adequate understanding of the information, these consolidated condensed interim financial statements must be read together with Atlantica’s consolidated financial statements for the year ended December 31, 2018 included in the 2018 20-F. In determining the information to be disclosed in the notes to the consolidated condensed interim financial statements, Atlantica, in accordance with IAS 34, has taken into account its materiality in relation to the consolidated condensed interim financial statements. The consolidated condensed interim financial statements are presented in U.S. dollars, which is the Company’s functional and presentation currency. Amounts included in these consolidated condensed interim financial statements are all expressed in thousands of U.S. dollars, unless otherwise indicated. These consolidated condensed interim financial statements were approved by the Board of Directors of the Company on May 7, 2019. Application of new accounting standards a) Standards, interpretations and amendments effective from January 1, 2019 under IFRS-IASB, applied by the Company in the preparation of these condensed interim financial statements: · IFRS 9 (Amendments to IFRS 9): Prepayment Features with Negative Compensation. This Standard is applicable for annual periods beginning on or after January 1, 2019 under IFRS-IASB, earlier application is permitted. · IAS 19 (Amendments to IAS 19): Plan Amendment, Curtailment or Settlement. This amendment is mandatory for annual periods beginning on or after January 1, 2019 under IFRS-IASB, earlier application is permitted. · IFRIC 23: Uncertainty over Income Tax Treatments. This Standard is applicable for annual periods beginning on or after January 1, 2019 under IFRS-IASB. · IAS 28 (Amendment). Long-term Interests in Associates and Joint Ventures. This amendment is mandatory for annual periods beginning on or after January 1, 2019 under IFRS-IASB, earlier application is permitted. · Amendments resulting from Annual Improvements 2015–2017 Cycle (remeasurement of previously held interest). This amendment is mandatory for annual periods beginning on or after January 1, 2019 under IFRS-IASB, The applications of these amendments have not had any material impact on these condensed interim financial statements. b) Standards, interpretations and amendments published by the IASB that will be effective for periods beginning on or after January 1, 2020: · IFRS 17 ‘Insurance Contracts’. This Standard is applicable for annual periods beginning on or after January 1, 2021 under IFRS-IASB, earlier application is permitted. · IFRS 3 (Amendment). Definition of Business. This amendment is mandatory for annual periods beginning on or after January 1, 2020 under IFRS-IASB, earlier application is permitted. · IAS 1 and IAS 8 (Amendment). Definition of Material. This amendment is mandatory for annual periods beginning on or after January 1, 2020 under IFRS-IASB, earlier application is permitted. · Amendments to References to the Conceptual Frameworks in IFRS Standards. This Standard is applicable for annual periods beginning on or after January 1, 2020 under IFRS-IASB. The Company does not anticipate any significant impact on the consolidated condensed financial statements derived from the application of the new standards and amendments that will be effective for annual periods beginning on or after January 1, 2020, although it is currently still in the process of evaluating such application. Use of estimates Some of the accounting policies applied require the application of significant judgment by management to select the appropriate assumptions to determine these estimates. These assumptions and estimates are based on the Company´s historical experience, advice from experienced consultants, forecasts and other circumstances and expectations as of the close of the financial period. The assessment is considered in relation to the global economic situation of the industries and regions where the Company operates, taking into account future development of our businesses. By their nature, these judgments are subject to an inherent degree of uncertainty; therefore, actual results could materially differ from the estimates and assumptions used. In such cases, the carrying values of assets and liabilities are adjusted. The most critical accounting policies, which reflect significant management estimates and judgment to determine amounts in these consolidated condensed interim financial statements, are as follows: • Contracted concessional agreements. • Impairment of intangible assets and property, plant and equipment. • Assessment of control. • Derivative financial instruments and fair value estimates. • Income taxes and recoverable amount of deferred tax assets. As of the date of preparation of these consolidated condensed interim financial statements, no relevant changes in the estimates made are anticipated and, therefore, no significant changes in the value of the assets and liabilities recognized at March 31, 2019 are expected. Although these estimates and assumptions are being made using all available facts and circumstances, it is possible that future events may require management to amend such estimates and assumptions in future periods. Changes in accounting estimates are recognized prospectively, in accordance with IAS 8, in the consolidated income statement of the period in which the change occurs.

Financial risk management

Financial risk management	3 Months Ended
	Mar. 31, 2019
Financial risk management [Abstract]
Financial risk management	Note 3. - Financial risk management Atlantica’s activities are exposed to various financial risks: market risk (including currency risk and interest rate risk), credit risk and liquidity risk. Risk is managed by the Company’s Risk Finance and Compliance Departments, which are responsible for identifying and evaluating financial risks, quantifying them by project, region and company, in accordance with mandatory internal management rules. Written internal policies exist for global risk management, as well as for specific areas of risk. In addition, there are official written management regulations regarding key controls and control procedures for each company and the implementation of these controls is monitored through internal audit procedures. These consolidated condensed interim financial statements do not include all financial risk management information and disclosures required for annual financial statements, and should be read together with the information included in Note 3 to Atlantica’s annual consolidated financial statements as of December 31, 2018.

Financial information by segmen

Financial information by segment	3 Months Ended
	Mar. 31, 2019
Financial information by segment [Abstract]
Financial information by segment	Note 4. - Financial information by segment Atlantica’s segment structure reflects how management currently makes financial decisions and allocates resources. Its operating segments are based on the following geographies where the contracted concessional assets are located: • North America • South America • EMEA Based on the type of business, as of March 31, 2019, the Company had the following business sectors: Renewable energy: Efficient natural gas: Electric transmission lines Water: Atlantica Yield’s Chief Operating Decision Maker (CODM) assesses the performance and assignment of resources according to the identified operating segments. The CODM considers the revenues as a measure of the business activity and the Further Adjusted EBITDA as a measure of the performance of each segment. Further Adjusted EBITDA is calculated as profit/(loss) for the period attributable to the parent company, after adding back loss/(profit) attributable to non-controlling interests from continued operations, income tax, share of profit/(loss) of associates carried under the equity method, finance expense net, depreciation, amortization and impairment charges of entities included in these consolidated financial statements, and compensations received from Abengoa in lieu of Abengoa Concessões Brasil Holding (“ACBH”) dividends (for the period up to the first quarter of 2017 only). In order to assess performance of the business, the CODM receives reports of each reportable segment using revenues and Further Adjusted EBITDA. Net interest expense evolution is assessed on a consolidated basis. Financial expense and amortization are not taken into consideration by the CODM for the allocation of resources. In the three-month periods ended March 31, 2019 and March 31, 2018, Atlantica had three customers with revenues representing more than 10% of the total revenues, two in the renewable energy and one in the efficient natural gas business sectors. a) The following tables show Revenues and Further Adjusted EBITDA by operating segments and business sectors for the three-month period ended March 31, 2019 and 2018: Revenue Further Adjusted EBITDA For the three-month period ended March 31, For the three-month period ended March 31, ($ in thousands) Geography 2019 2018 2019 2018 North America 60,441 61,781 50,870 60,247 South America 33,493 29,536 28,212 24,180 EMEA 127,518 133,948 100,007 93,541 Total 221,452 225,265 179,089 177,968 Revenue Further Adjusted EBITDA For the three-month period ended March 31, For the three-month period ended March 31, ($ in thousands) Business sector 2019 2018 2019 2018 Renewable energy 156,817 167,225 123,484 131,435 Efficient natural gas 34,009 28,387 30,476 23,330 Electric transmission lines 24,867 23,840 21,650 19,836 Water 5,759 5,813 3,479 3,367 Total 221,452 225,265 179,089 177,968 The reconciliation of segment Further Adjusted EBITDA with the profit/(loss) attributable to the Company is as follows: For the three-month period ended March 31, ($ in thousands) 2019 2018 Loss attributable to the Company $ (8,957 ) (4,764 ) Profit attributable to non-controlling interests 5,267 3,254 Income tax 9,577 4,650 Share of (profits)/losses of associates (1,823 ) (1,407 ) Financial expense, net 99,289 101,611 Depreciation, amortization, and impairment charges 75,736 74,624 Total segment Further Adjusted EBITDA $ 179,089 177,968 b) The assets and liabilities by operating segments (and business sector) as of March 31, 2019 and December 31, 2018 are as follows: Assets and liabilities by geography as of March 31, 2019: North America South America EMEA Balance as of March 31, 2019 ($ in thousands) Assets allocated Contracted concessional assets 3,419,111 1,200,662 3,769,735 8,389,508 Investments carried under the equity method - - 54,777 54,777 Current financial investments 140,258 70,948 30,338 241,544 Cash and cash equivalents (project companies) 156,085 40,526 349,772 546,383 Subtotal allocated 3,715,454 1,312,136 4,204,622 9,232,212 Unallocated assets Other non-current assets 217,591 Other current assets (including cash and cash equivalents at holding company level) 370,040 Subtotal unallocated 587,631 Total assets 9,819,843 North America South America EMEA Balance as of March 31, 2019 ($ in thousands) Liabilities allocated Long-term and short-term project debt 1,734,366 897,807 2,444,179 5,076,352 Grants and other liabilities 1,518,669 8,364 126,290 1,653,323 Subtotal allocated 3,253,035 906,171 2,570,469 6,729,675 Unallocated liabilities Long-term and short-term corporate debt 697,545 Other non-current liabilities 560,833 Other current liabilities 166,787 Subtotal unallocated 1,425,165 Total liabilities 8,154,840 Equity unallocated 1,665,003 Total liabilities and equity unallocated 3,090,168 Total liabilities and equity 9,819,843 Assets and liabilities by geography as of December 31, 2018: North America South America EMEA Balance as of December 31, 2018 ($ in thousands) Assets allocated Contracted concessional assets 3,453,652 1,210,624 3,884,905 8,549,181 Investments carried under the equity method - - 53,419 53,419 Current financial investments 147,213 61,959 30,080 239,252 Cash and cash equivalents (project companies) 195,678 41,316 287,456 524,450 Subtotal allocated 3,796,543 1,313,899 4,255,860 9,366,302 Unallocated assets Other non-current assets 188,736 Other current assets (including cash and cash equivalents at holding company level) 363,993 Subtotal unallocated 552,729 Total assets 9,919,031 North America South America EMEA Balance as of December 31, 2018 ($ in thousands) Liabilities allocated Long-term and short-term project debt 1,725,961 900,801 2,464,352 5,091,114 Grants and other liabilities 1,527,724 7,550 122,852 1,658,126 Subtotal allocated 3,253,685 908,351 2,587,204 6,749,240 Unallocated liabilities Long-term and short-term corporate debt 684,073 Other non-current liabilities 523,827 Other current liabilities 205,779 Subtotal unallocated 1,413,679 Total liabilities 8,162,919 Equity unallocated 1,756,112 Total liabilities and equity unallocated 3,169,791 Total liabilities and equity 9,919,031 Assets and liabilities by business sector as of March 31, 2019: Renewable energy Efficient natural gas Electric transmission lines Water Balance as of March 31, 2019 ($ in thousands) Assets allocated Contracted concessional assets 6,844,804 581,808 876,781 86,115 8,389,508 Investments carried under the equity method 10,114 - - 44,663 54,777 Current financial investments 15,083 140,237 70,091 16,133 241,544 Cash and cash equivalents (project companies) 491,723 28,612 13,586 12,462 546,383 Subtotal allocated 7,361,724 750,657 960,458 159,373 9,232,212 Unallocated assets Other non-current assets 217,591 Other current assets (including cash and cash equivalents at holding company level) 370,040 Subtotal unallocated 587,631 Total assets 9,819,843 Renewable energy Efficient natural gas Electric transmission lines Water Balance as of March 31, 2019 ($ in thousands) Liabilities allocated Long-term and short-term project debt 3,857,857 540,695 649,802 27,998 5,076,352 Grants and other liabilities 1,651,442 151 959 771 1,653,323 Subtotal allocated 5,509,299 540,846 650,761 28,769 6,729,675 Unallocated liabilities Long-term and short-term corporate debt 697,545 Other non-current liabilities 560,833 Other current liabilities 166,787 Subtotal unallocated 1,425,165 Total liabilities 8,154,840 Equity unallocated 1,665,003 Total liabilities and equity unallocated 3,090,168 Total liabilities and equity 9,819,843 Assets and liabilities by business sector as of December 31, 2018: Renewable energy Efficient natural gas Electric transmission lines Water Balance as of December 31, 2018 ($ in thousands) Assets allocated Contracted concessional assets 6,998,020 580,997 882,980 87,184 8,549,181 Investments carried under the equity method 10,257 - - 43,162 53,419 Current financial investments 15,396 147,192 61,102 15,562 239,252 Cash and cash equivalents (project companies) 453,096 45,625 14,043 11,686 524,450 Subtotal allocated 7,476,769 773,814 958,125 157,594 9,366,302 Unallocated assets Other non-current assets 188,736 Other current assets (including cash and cash equivalents at holding company level) 363,993 Subtotal unallocated 552,729 Total assets 9,919,031 Renewable energy Efficient natural gas Electric transmission lines Water Balance as of December 31, 2018 ($ in thousands) Liabilities allocated Long-term and short-term project debt 3,868,626 545,123 647,820 29,545 5,091,114 Grants and other liabilities 1,656,146 161 1,025 794 1,658,126 Subtotal allocated 5,524,772 545,284 648,845 30,339 6,749,240 Unallocated liabilities Long-term and short-term corporate debt 684,073 Other non-current liabilities 523,827 Other current liabilities 205,779 Subtotal unallocated 1,413,679 Total liabilities 8,162,919 Equity unallocated 1,756,112 Total liabilities and equity unallocated 3,169,791 Total liabilities and equity 9,919,031 c) The amount of depreciation, amortization and impairment charges recognized for the three-month periods ended March 31, 2019 and 2018 are as follows: For the three-month period ended March 31, Depreciation, amortization and impairment by geography 2019 2018 ($ in thousands) North America (26,583 ) (23,861 ) South America (11,251 ) (10,197 ) EMEA (37,902 ) (40,566 ) Total (75,736 ) (74,624 ) For the three-month period ended March 31, Depreciation, amortization and impairment by business sectors 2019 2018 ($ in thousands) Renewable energy (72,139 ) (67,554 ) Electric transmission lines (6,134 ) (7,070 ) Efficent natual gas 2,537 - Total (75,736 ) (74,624 )

Changes in the scope of the con

Changes in the scope of the consolidated condensed interim financial statements	3 Months Ended
	Mar. 31, 2019
Changes in the scope of the consolidated condensed interim financial statements [Abstract]
Changes in the scope of the consolidated condensed interim financial statements	Note 5. - Changes in the scope of the consolidated condensed interim financial statements For the three-month period ended March 31, 2019 There is no change in the scope of the consolidated condensed interim financial statement ended as of March 31, 2019. For the year ended December 31, 2018 On February 28, 2018, the Company completed the acquisition of a 100% stake in Hidrocañete, S.A. (Mini-Hydro). Total purchase price for this asset amounted to $9,327 thousand. The acquisition has been accounted for in the consolidated accounts of Atlantica Yield, in accordance with IFRS 3, Business Combinations. On October 10, 2018, the Company completed the acquisition of a 5% stake in Gas CA-KU-A1, S.A.P.I de C.V. (Pemex Transportation System or “PTS”). The acquisition has been accounted for in the consolidated accounts of Atlantica Yield, in accordance with IAS 28, Investments in Associates. Consideration for the initial 5%, which amounts to approximately $7 million will be disbursed progressively as construction progresses. Once the project enters into operation, which is expected for late 2019 or early 2020, the Company expects to acquire an additional 65% as per the terms of the purchase agreements. Finally, the Company expects to acquire the remaining 30% one year after COD, subject to final approvals. The total equity investment is estimated to amount to approximately $150 million. On December 11, 2018, the Company completed the acquisition of a transmission line in Chile (Chile TL3). The total purchase price for this asset amounted to $6 million. financial statements On December 13, 2018, the Company completed approximately million. financial statements On December 28, 2018, the Company completed the acquisition of a power substation and two small transmission lines in Peru, being an expansion of the ATN transmission line (“ATN expansion 1”). Total purchase price for this asset amounted to $16 million. financial statements The amount of assets and liabilities integrated at the effective acquisition date for the aggregated change in scope is shown in the following table: Asset Acquisition for the year ended December 31, 2018 ($ in thousands) Concessional assets 155,909 Investments carried under the equity method 1 Current assets 5,646 Project debt long term (79,016 ) Deferred tax liabilities (590 ) Project debt short term (2,346 ) Other current and non-current liabilities (3,000 ) Asset acquisition - purchase price (76,604 ) Net result of the asset acquisition - As a result of the acquisitions being made effective near to year end, the allocation of the purchase prices was provisional as of December 31, 2018. As such, the amounts indicated may be adjusted during the measurement period to reflect new information obtained about facts and circumstances that existed at the acquisition date that, if known, would have affected the amounts recognized as of December 31, 2018. The measurement period will not exceed one year from the acquisition dates.

Contracted concessional assets

Contracted concessional assets	3 Months Ended
	Mar. 31, 2019
Contracted concessional assets [Abstract]
Contracted concessional assets	Note 6. - Contracted concessional assets The detail of contracted concessional assets included in the heading ‘Contracted concessional assets’ as of March 31, 2019 and December 31, 2018 is as follows: Balance as of March 31, Balance as of December 31, 2019 2018 ($ in thousands) Contracted concessional assets cost 10,373,619 10,475,828 Amortization and impairment (1,984,111 ) (1,926,647 ) Total 8,389,508 8,549,181 Contracted concessional assets include fixed assets financed through project debt, related to service concession arrangements recorded in accordance with IFRIC 12, except for Palmucho, which is recorded in accordance with IAS 17, and PS10, PS20, Seville PV, Mini-Hydro and Chile TL3 which are recorded as property plant and equipment in accordance with IAS 16. Concessional assets recorded in accordance with IFRIC 12 are either intangible or financial assets. As of March 31, 2019, contracted concessional financial assets amount to $843,909 thousand ($843,291 thousand as of December 31, 2018). The decrease in the contracted concessional assets cost is primarily due to the lower value of assets denominated in euros since the exchange rate of the euro has dropped against the U.S. dollar since December 31, 2018. No losses from impairment of contracted concessional assets were recorded during the three-month period ended March 31, 2019 ($42.7 million during the year 2018 in the Solana project).

Investments carried under the e

Investments carried under the equity method	3 Months Ended
	Mar. 31, 2019
Investments carried under the equity method [Abstract]
Investments carried under the equity method	Note 7. - Investments carried under the equity method The table below shows the breakdown of the investments held in associates as of March 31, 2019 and December 31, 2018: Balance as of March 31, Balance as of December 31, 2019 2018 ($ in thousands) Evacuación Valdecaballeros, S.L. 8,652 8,773 Myah Bahr Honaine, S.P.A.(*) 44,663 43,161 Pectonex, R.F. Proprietary Limited 1,461 1,485 ABY Infraestructuras, S.L. 1 - Ca Ku A1, S.A.P.I. de CV (PTS) - - Evacuación Villanueva del Rey, S.L - - Total 54,777 53,419 (*) Myah Bahr Honaine, S.P.A., the project entity, is 51% owned by Geida Tlemcen, S.L. which is accounted for using the equity method in these consolidated condensed interim financial statements. Geida Tlemcen, S.L. is 50% owned by Atlantica.

Financial investments

Financial investments	3 Months Ended
	Mar. 31, 2019
Financial investments [Abstract]
Financial investments	Note 8. - Financial investments The detail of Non-current and Current financial investments as of March 31, 2019 and December 31, 2018 is as follows: Balance as of March 31, 2019 Balance as of December 31, 2018 ($ in thousands) Fair Value through OCI (Investment in Ten West link) 6,034 6,034 Derivative assets 6,297 11,571 Other receivable accounts at amortized cost 53,055 35,065 Total non-current financial investments 65,386 52,670 Contracted concessional financial assets 152,230 159,128 Derivative assets 1,481 1,582 Other receivable accounts at amortized cost 89,314 80,124 Total current financial investments 243,025 240,834 Investment in Ten West Link is a $12.5 million interest in a 114-mile transmission line in the U.S. The increase of Non-current other receivable accounts at amortized cost is primarily due to the $19.9 million advance payment the Company made in January 2019 for the acquisition of Befesa Agua Tenés S.L.U. (see Note 1 for further details).

Derivative financial instrument

Derivative financial instruments	3 Months Ended
	Mar. 31, 2019
Derivative financial instruments [Abstract]
Derivative financial instruments	Note 9. - Derivative financial instruments The breakdowns of the fair value amount of the derivative financial instruments as of March 31, 2019 and December 31, 2018 are as follows: Balance as of March 31, 2019 Balance as of December 31, 2018 ($ in thousands) Assets Liabilities Assets Liabilities Interest rate - cash flow hedge 3,879 305,138 9,923 279,152 Foreign exchange derivative instruments 3,899 - 3,230 - Total 7,778 305,138 13,153 279,152 The derivatives are primarily interest rate cash-flow hedges. All are classified as non-current assets or non-current liabilities, as they hedge long-term financing agreements. Additionally, the Company owns currency options with leading international financial institutions, which guarantee minimum Euro-U.S. dollar exchange rates. The strategy of the Company is to hedge the exchange rate for the distributions from its Spanish assets after deducting euro-denominated interest payments and euro-denominated general and administrative expenses. Through currency options, the strategy of the Company is to hedge 100% of its euro-denominated net exposure for the next 12 months and 75% of its euro denominated net exposure for the following 12 months, on a rolling basis. Hedge accounting is not applied to these options The net amount of the fair value of interest rate derivatives designated as cash flow hedges transferred to the consolidated condensed income statement is a loss of $14 .2 million .3 million The after-tax results accumulated in equity in connection with derivatives designated as cash flow hedges as of March 31, 2019 and December 31, 2018 amount to a profit of $71 .0 million .0 million .

Fair value of financial instrum

Fair value of financial instruments	3 Months Ended
	Mar. 31, 2019
Fair value of financial instruments [Abstract]
Fair value of financial instruments	Note 10. - Fair value of financial instruments Financial instruments measured at fair value are presented in accordance with the following level classification based on the nature of the inputs used for the calculation of fair value: • Level 1: Inputs are quoted prices in active markets for identical assets or liabilities. • Level 2: Fair value is measured based on inputs other than quoted prices included within Level 1 that are observable for the asset or liability, either directly (i.e. as prices) or indirectly (i.e. derived from prices). • Level 3: Fair value is measured based on unobservable inputs for the asset or liability. As of March 31, 2019, and December 31, 2018, all the financial instruments measured at fair value correspond to derivatives and have been classified as Level 2.

Related parties

Related parties	3 Months Ended
	Mar. 31, 2019
Related parties [Abstract]
Related parties	Note 11. - Related parties During the normal course of business, the Company has historically conducted operations with related parties consisting mainly of Abengoa´s subsidiaries and non-controlling interests. The transactions were completed at market rates. Further to the sale of its remaining 16.47% stake in the Company to Algonquin on November 27, 2018, Abengoa ceased to fulfill the conditions to be a related party as per IAS 24 - Related Parties Disclosures. Algonquin on its side is a related party since it completed the acquisition of a 25% stake in the Company in March 2018. Details of balances with related parties as of March 31, 2019 and December 31, 2018, which therefore do not include balances with Abengoa, are as follows: Balance as of March 31, Balance as of December 31, 2019 2018 ($ in thousands) Credit receivables (current) 4,044 5,328 Total current receivables with related parties 4,044 5,328 Trade payables (current) 25,139 19,352 Total current payables with related parties 25,139 19,352 Credit payables (non-current) 28,434 33,675 Total non-current payables with related parties 28,434 33,675 Receivables and payables as of March 31, 2019 fully relate to debts with non-controlling interests partners in Kaxu, Solaben 2&3 and Solacor 1&2. The transactions carried out with related parties, which are primarily transactions with Abengoa and with subsidiaries of Abengoa, during the three-month periods ended March 31, 2018, have been as follows: For the three-month period ended March 31, 2019 2018 ($ in thousands) Services received - (26,541 ) Financial income 7 1,386 Financial expenses (183 ) (341 ) During 2018 services received primarily include operation and maintenance services received by some assets. In addition, Abengoa maintains a number of obligations under EPC, O&M and other contracts, as well as indemnities covering certain potential risks. Additionally, Abengoa represented that further to the accession to the restructuring agreement, Atlantica Yield would not be a guarantor of any obligation of Abengoa with respect to third parties and agreed to indemnify the Company for any penalty claimed by third parties resulting from any breach in such representations. The Company has contingent assets, which have not been recognized as of March 31, 2019, related to the obligations of Abengoa referred above, which result and amounts will depend on the occurrence of uncertain future events. In particular as of April 26, 2018 and November 28, 2018, Abengoa agreed to pay Atlantica certain amounts subject to conditions which are beyond the control of the Company. The Company entered into a Financial Support Agreement on June 13, 2014 under which Abengoa agreed to maintain any guarantees and letters of credit that have been provided by it on behalf of or for the benefit of Atlantica Yield and its affiliates for a period of five years. As of March 31, 2019, the aforementioned guarantees amounted to $3 million and Atlantica is working on replacing those guarantees where necessary.

Trade and other receivables

Trade and other receivables	3 Months Ended
	Mar. 31, 2019
Trade and other receivables [Abstract]
Trade and other receivables	Note 12. - Trade and other receivables Trade and other receivables as of March 31, 2019 and December 31, 2018, consist of the following: Balance as of March 31, Balance as of December 31, 2019 2018 ($ in thousands) Trade receivables 177,841 163,856 Tax receivables 35,062 54,959 Prepayments 19,342 5,521 Other accounts receivable 9,167 12,059 Total 241,412 236,395 As of March 31, 2019, and December 31, 2018, the fair value of trade and other receivables accounts does not differ significantly from its carrying value.

Equity

Equity	3 Months Ended
	Mar. 31, 2019
Equity [Abstract]
Equity	Note 13. - Equity Atlantica Yield’s shares began trading on the NASDAQ Global Select Market under the symbol “ABY” on June 13, 2014. The symbol changed to “AY” on November 11, 2017. As of March 31, 2019, the share capital of the Company amounts to $10,021,726 represented by 100,217,260 ordinary shares completely subscribed and disbursed with a nominal value of $0.10 each, all in the same class and series. Each share grants one voting right. Algonquin completed in 2018 the acquisition from Abengoa of its entire stake in Atlantica Yield, 41.47% of the total shares of the Company, becoming the largest shareholder of the Company. Atlantica Yield reserves as of March 31, 2019 are made up of share premium accounts and distributable reserves. Retained earnings primarily include results attributable to Atlantica Yield. Non-controlling interests fully relate to interests held by JGC in Solacor 1 and Solacor 2, by Idae in Seville PV, by Itochu Corporation in Solaben 2 and Solaben 3, by Algerian Energy Company, SPA and Sacyr Agua S.L. in Skikda and by Industrial Development Corporation of South Africa (IDC) and Kaxu Community Trust in Kaxu Solar One (Pty) Ltd. On February 26, 2019, the Board of Directors declared a dividend of $0.37 per share corresponding to the fourth quarter of 2018. The dividend was paid on March 22, 2019. In addition, as of March 31, 2019, there was no treasury stock and there have been no transactions with treasury stock during the three-month period then ended.

Corporate debt

Corporate debt	3 Months Ended
	Mar. 31, 2019
Corporate debt [Abstract]
Corporate debt	Note 14. - Corporate debt The breakdown of the corporate debt as of March 31, 2019 and December 31, 2018 is as follows: Balance as of Mach 31, Balance as of December 31, 2019 2018 ($ in thousands) Non-current 423,921 415,168 Current 273,624 268,905 Total Corporate Debt 697,545 684,073 The repayment schedule for the corporate debt as of March 31, 2019 is as follows: Remainder of 2019 Between January and March 2020 2021 2022 2023 Subsequent years Total ($ in thousands) New Revolving Credit Facility - - 122,761 - - - 122,761 Note Issuance Facility 422 - 100,902 100,166 100,092 301,582 2017 Credit Facility 11,203 - - - - - 11,203 2019 Notes 261,999 - - - - - 261,999 Total 273,624 - 122,761 100,902 100,166 100,092 697,545 On November 17, 2014, the Company issued the Senior Notes due 2019 in an aggregate principal amount of $255,000 thousand (the “2019 Notes”). The 2019 Notes accrue annual interest of 7.00% payable semi-annually beginning on May 15, 2015 until their maturity date. As of March 31, 2019, the amount of 2019 Notes is classified as Current, considering its maturity is November 15, 2019. On February 10, 2017, the Company issued Senior Notes due 2022, 2023, 2024 (the “Note Issuance Facility”), in an aggregate principal amount of €275,000 thousand. The 2022 to 2024 Notes accrue annual interest, equal to the sum of (i) EURIBOR plus (ii) 4.90%, as determined by the Agent. Interest on the Notes are payable in cash quarterly in arrears on each interest payment date. The Company pays interest to the holders of record on each interest payment date. The interest rate on the Note Issuance Facility is fully hedged by two interest rate swaps contracted with Jefferies Financial Services, Inc. with effective date March 31, 2017 and maturity date December 31, 2022, resulting in the Company paying a net fixed interest rate of 5.5% on the Note Issuance Facility. Changes in fair value of these interest rate swaps have been recorded in the consolidated income statement. The Note Issuance Facility is a € denominated liability for which the Company applies net investment hedge accounting. When converted to US$ at US$/€ closing exchange rate, it contributes to reduce the impact in translation difference reserves generated in the equity of these consolidated financial statements by the conversion of the net assets of the Spanish solar assets into US$. On July 20, 2017, the Company signed a credit facility (the “2017 Credit Facility”) for up to €10 million, approximately $11.2 million, which is available in euros or U.S. dollars and was fully drawn down in 2017. Amounts drawn down accrue interest at a rate per year equal to EURIBOR plus 2.25% or LIBOR plus 2.25%, depending on the currency. The credit facility maturity date is July 20, 2019. On May 10, 2018, the Company entered into a $215 million revolving credit facility (the “New Revolving Credit Facility”) with Royal Bank of Canada, as administrative agent and Royal Bank of Canada and Canadian Imperial Bank of Commerce, as issuers of letters of credit. Amounts drawn down accrue interest at a rate per year equal to (A) for Eurodollar rate loans, LIBOR plus a percentage determined by reference to the leverage ratio of the Company, ranging between 1.60% and 2.25% and (B) for base rate loans, the highest of (i) the rate per annum equal to the weighted average of the rates on overnight U.S. Federal funds transactions with members of the U.S. Federal Reserve System arranged by U.S. Federal funds brokers on such day plus ½ of 1.00%, (ii) the U.S. prime rate and (iii) LIBOR plus 1.00%, in any case, plus a percentage determined by reference to the leverage ratio of the Company, ranging between 0.60% and 1.00%. Letters of credit may be issued using up to $70 million of the Revolving Credit Facility. The maturity of the Revolving Credit Facility is December 31, 2021. As of March 31, 2019, the Company had drawn down an amount of $123 million (net of debt issuance costs). During the month of January 2019, the amount of the New Revolving Credit Facility increased from $215 million to $300 million. Current corporate debt corresponds mainly to the nominal and accrued interest of the 2019 Notes and to the nominal of the 2017 Credit Facility.

Project debt

Project debt	3 Months Ended
	Mar. 31, 2019
Project debt [Abstract]
Project debt	Note 15. - Project debt The main purpose of the Company is the long-term ownership and management of contracted concessional assets, such as renewable energy, efficient natural gas, electric transmission line and water assets, which are financed through project debt. This note shows the project debt linked to the contracted concessional assets included in Note 6 of these consolidated condensed interim financial statements. Project debt is generally used to finance contracted assets, exclusively using as guarantee the assets and cash flows of the company or group of companies carrying out the activities financed. In most of the cases, the assets and/or contracts are set up as guarantee to ensure the repayment of the related financing. In addition, the cash of the Company´s projects includes funds held to satisfy the customary requirements of certain non-recourse debt agreements for an amount of $259 million as of March 31, 2019. Compared with corporate debt, project debt has certain key advantages, including a greater leverage and a clearly defined risk profile. The breakdown of project debt for both non-current and current liabilities as of March 31, 2019 and December 31, 2018 is as follows: Balance as of March 31, Balance as of December 31, 2019 2018 ($ in thousands) Non-current 4,769,119 4,826,659 Current 307,233 264,455 Total Project debt 5,076,352 5,091,114 The decrease in total project debt is primarily due to contractual payments of debt for the period and the lower value of debts denominated in foreign currencies since their exchange rate has decreased against the U.S. dollars since December 31, 2018. The repayment schedule for project debt in accordance with the financing arrangements, as of March 31, 2019 is as follows and is consistent with the projected cash flows of the related projects: Remainder of 2019 Payment of interests accrued as of March 31, 2019 Nominal repayment Between January and March 2020 Between April and December 2020 2021 2022 2023 Subsequent Years Total ($ in thousands) 64,135 226,100 16,998 236,207 265,416 296,067 321,564 3,649,865 5,076,352

Grants and other liabilities

Grants and other liabilities	3 Months Ended
	Mar. 31, 2019
Grants and other liabilities [Abstract]
Grants and other liabilities	Note 16. - Grants and other liabilities Balance as of March 31, Balance as of December 31, 2019 2018 ($ in thousands) Grants 1,134,944 1,150,805 Other Liabilities 518,379 507,321 Grant and other non-current liabilities 1,653,323 1,658,126 As of March 31, 2019, the amount recorded in Grants corresponds primarily to the ITC Grant awarded by the U.S. Department of the Treasury to Solana and Mojave for a total amount of $731 million ($739 million as of December 31, 2018), which was primarily used to fully repay the Solana and Mojave short-term tranche of the loan with the Federal Financing Bank. The amount recorded in Grants as a liability is progressively recorded as other income over the useful life of the asset. The remaining balance of the “Grants” account corresponds to loans with interest rates below market rates for Solana and Mojave for a total amount of $402 million ($410 million as of December 31, 2018). Loans with the Federal Financing Bank guaranteed by the Department of Energy for these projects bear interest at a rate below market rates for these types of projects and terms. The difference between proceeds received from these loans and its fair value, is initially recorded as “Grants” in the consolidated statement of financial position, and subsequently recorded in “Other operating income” starting at the entry into operation of the plants. Total amount of income for these two types of grants for Solana and Mojave is $14.8 million and $14.9 million for the three-month periods ended March 31, 2019 and 2018, respectively. Other liabilities mainly relate to the investment from Liberty Interactive Corporation (“Liberty”) made on October 2, 2013 for an amount of $300 million. The investment was made in class A shares of Arizona Solar Holding, the holding of Solana Solar plant in the United States. Such investment was made in a tax equity partnership which permits the partners to have certain tax benefits such as accelerated depreciation and ITC. Liberty has the right to receive 61.20% of taxable losses and distributions until such time as Liberty reaches a certain rate of return, or the Flip Date, and 22.60% of taxable losses and distributions thereafter. Given the underperformance of the asset in the last years, there is uncertainty regarding the Flip Date, regarding when it will occur, if so. The Company expects potential cash distributions from Solana to go mostly or entirely to Liberty in the upcoming years. According to the stipulations of IAS 32 and in spite of the fact that the investment of Liberty is in shares, it does not qualify as equity and has been classified as a liability as of March 31, 2019 and as of December 2018. The liability is recorded in Grants and other liabilities for a total amount of $364 million as of March 31, 2019 ($358 million as of December 31, 2018) and its current portion is recorded in other current liabilities for the remaining amount (see Note 17). This liability has been initially valued at fair value, calculated as the present value of expected cash-flows during the useful life of the concession, and is then measured at amortized cost in accordance with the effective interest method, considering the most updated expected future cash-flows. Additionally, other liabilities include $56 million as of March 31, 2019 ($57 million as of December 2018) of finance lease liabilities.

Trade payables and other curren

Trade payables and other current liabilities	3 Months Ended
	Mar. 31, 2019
Trade payables and other current liabilities [Abstract]
Trade payables and other current liabilities	Note 17. - Trade payables and other current liabilities Trade payable and other current liabilities as of March 31, 2019 and December 31, 2018 are as follows: Balance as of March 31, Balance as of December 31, 2019 2018 ($ in thousands) Trade accounts payable 71,367 109,430 Down payments from clients 6,249 6,289 Liberty (see Note 16) 37,119 37,119 Other accounts payable 36,728 39,195 Total 151,463 192,033 Trade accounts payables mainly relate to the operation and maintenance of the plants. Nominal values of Trade payables and other current liabilities are considered to approximately equal to fair values and the effect of discounting them is not significant.

Income Tax

Income Tax	3 Months Ended
	Mar. 31, 2019
Income Tax [Abstract]
Income Tax	Note 18. - Income Tax The effective tax rate for the periods presented has been established based on Management’s best estimates. In the three-month period ended March 31, 2019, Income tax amounted to a $9,577 thousand expense with respect to a profit before income tax of $5,887 thousand. In the three-month period ended March 31, 2018, Income tax amounted to a $4,650 thousand expense with respect to a profit before income tax of $3,140 thousand. The effective tax rate differs from the nominal tax rate mainly due to permanent differences and treatment of tax credits in some jurisdictions.

Financial income and expenses

Financial income and expenses	3 Months Ended
	Mar. 31, 2019
Financial income and expenses [Abstract]
Financial income and expenses	Note 19. - Financial income and expenses Financial income and expenses The following table sets forth our financial income and expenses for the three-month period ended March 31, 2019 and 2018: For the three-month period ended March 31, Financial income 2019 2018 ($ in thousands) Interest income from loans and credits 173 119 Interest rates benefits derivatives: cash flow hedges 113 177 Total 286 296 For the three-month period ended March 31, Financial expenses 2019 2018 Expenses due to interest: ($ in thousands) - Loans from credit entities (63,233 ) (63,751 ) - Other debts (23,822 ) (18,468 ) Interest rates losses derivatives: cash flow hedges (14,448 ) (17,848 ) Total (101,503 ) (100,067 ) Interests from other debts are primarily interests on the notes issued by ATS, ATN, Atlantica Yield and Solaben Luxembourg and interests related to the investment from Liberty (see Note 16). Losses from interest rate derivatives designated as cash flow hedges correspond primarily to transfers from equity to financial expense when the hedged item is impacting the consolidated condensed income statement. Other net financial income and expenses The following table sets out ‘Other net financial income and expenses” for the three-month periods ended March 31, 2019, and 2018: For the three-month period ended March 31, Other financial income / (expenses) 2019 2018 ($ in thousands) Other financial income 5,633 2,171 Other financial losses (4,571 ) (3,831 ) Total 1,062 (1,660 ) Other financial income are primarily interests on deposits. Other financial losses primarily include expenses for guarantees and letters of credit, wire transfers, other bank fees and other minor financial expenses.

Other operating income and expe

Other operating income and expenses	3 Months Ended
	Mar. 31, 2019
Other operating income and expenses [Abstract]
Other operating income and expenses	Note 20. - Other operating income and expenses The table below shows the detail of Other operating income and expenses for the three-month periods ended March 31, 2019, and 2018: Other Operating income For the three-month period ended March 31, 2019 2018 ($ in thousands) Grants (see Note 16) 14,789 14,857 Income from various services and insurance proceeds 11,650 13,557 Total 26,439 28,414 Other Operating expenses For the three-month period ended March 31, 2019 2018 ($ in thousands) Leases and fees (731 ) (743 ) Operation and maintenance (33,817 ) (32,444 ) Independent professional services (8,833 ) (7,091 ) Supplies (6,865 ) (7,391 ) Insurance (6,112 ) (6,443 ) Levies and duties (3,069 ) (9,909 ) Other expenses (1,146 ) (2,173 ) Total (60,573 ) (66,194 )

Earnings per share

Earnings per share	3 Months Ended
	Mar. 31, 2019
Earnings per share [Abstract]
Earnings per share	Note 21. - Earnings per share Basic earnings per share have been calculated by dividing the loss attributable to equity holders by the average number of shares outstanding. Diluted earnings per share equals basic earnings per share for the periods presented. Item For the three-month period ended March 31, 2019 2018 ($ in thousands) Profit/ (loss) from continuing operations attributable to Atlantica Yield Plc. (8,957 ) (4,764 ) Average number of ordinary shares outstanding (thousands) - basic and diluted 100,217 100,217 Earnings per share from continuing operations (U.S. dollar per share) - basic and diluted (0.09 ) (0.05 ) Earnings per share from profit/(loss) for the period (U.S. dollar per share) - basic and diluted (0.09 ) (0.05 )

Subsequent events

Subsequent events	3 Months Ended
	Mar. 31, 2019
Subsequent events [Abstract]
Subsequent events	Note 22. - Subsequent events On April 30, 2019 the of 30 . %. May 30 from closing discretion In April 2019, the Company entered into an agreement to acquire a 30% stake in Monterrey, a 142 MW gas-fired engine facility including 130MW installed capacity and 12 MW battery capacity. The asset, located in Mexico, has been in operation since 2018 and represents the first investment in electric batteries for the Company. It has a U.S. dollar-denominated 20-year PPA with two international large corporations engaged in the car manufacturing industry as well as a 20-year contract for the natural gas transportation with a U.S. energy company. The PPA also includes price escalation factors. The asset is the sole electricity supplier for the off-takers, it has no commodity risk and also has the possibility to sell excess energy to the North-East region of the country. The total equity investment is estimated to be approximately $42 million. Closing of the acquisition shares for On May 7, 2019, the Board of Directors of the Company approved a dividend of $0.39 per share, which is expected to be paid on June 14, 2019.

Basis of preparation (Policies)

Basis of preparation (Policies)	3 Months Ended
	Mar. 31, 2019
Basis of preparation [Abstract]
Basis of preparation	The accompanying consolidated condensed interim financial statements represent the consolidated results of the Company and its subsidiaries. The company´s annual consolidated financial statements as of December 31, 2018, were approved by the Board of Directors on February 26, 2019. These consolidated condensed interim financial statements are presented in accordance with International Accounting Standards (“IAS”) 34, “Interim Financial Reporting”. In accordance with IAS 34, interim financial information is prepared solely in order to update the most recent annual consolidated financial statements prepared by the Company, placing emphasis on new activities, occurrences and circumstances that have taken place during the three-month period ended March 31, 2019 and not duplicating the information previously published in the annual consolidated financial statements for the year ended December 31, 2018. Therefore, the consolidated condensed interim financial statements do not include all the information that would be required in a complete set of consolidated financial statements prepared in accordance with the IFRS-IASB (“International Financial Reporting Standards-International Accounting Standards Board”). In view of the above, for an adequate understanding of the information, these consolidated condensed interim financial statements must be read together with Atlantica’s consolidated financial statements for the year ended December 31, 2018 included in the 2018 20-F. In determining the information to be disclosed in the notes to the consolidated condensed interim financial statements, Atlantica, in accordance with IAS 34, has taken into account its materiality in relation to the consolidated condensed interim financial statements. The consolidated condensed interim financial statements are presented in U.S. dollars, which is the Company’s functional and presentation currency. Amounts included in these consolidated condensed interim financial statements are all expressed in thousands of U.S. dollars, unless otherwise indicated. These consolidated condensed interim financial statements were approved by the Board of Directors of the Company on May 7, 2019. Application of new accounting standards a) Standards, interpretations and amendments effective from January 1, 2019 under IFRS-IASB, applied by the Company in the preparation of these condensed interim financial statements: · IFRS 9 (Amendments to IFRS 9): Prepayment Features with Negative Compensation. This Standard is applicable for annual periods beginning on or after January 1, 2019 under IFRS-IASB, earlier application is permitted. · IAS 19 (Amendments to IAS 19): Plan Amendment, Curtailment or Settlement. This amendment is mandatory for annual periods beginning on or after January 1, 2019 under IFRS-IASB, earlier application is permitted. · IFRIC 23: Uncertainty over Income Tax Treatments. This Standard is applicable for annual periods beginning on or after January 1, 2019 under IFRS-IASB. · IAS 28 (Amendment). Long-term Interests in Associates and Joint Ventures. This amendment is mandatory for annual periods beginning on or after January 1, 2019 under IFRS-IASB, earlier application is permitted. · Amendments resulting from Annual Improvements 2015–2017 Cycle (remeasurement of previously held interest). This amendment is mandatory for annual periods beginning on or after January 1, 2019 under IFRS-IASB, The applications of these amendments have not had any material impact on these condensed interim financial statements. b) Standards, interpretations and amendments published by the IASB that will be effective for periods beginning on or after January 1, 2020: · IFRS 17 ‘Insurance Contracts’. This Standard is applicable for annual periods beginning on or after January 1, 2021 under IFRS-IASB, earlier application is permitted. · IFRS 3 (Amendment). Definition of Business. This amendment is mandatory for annual periods beginning on or after January 1, 2020 under IFRS-IASB, earlier application is permitted. · IAS 1 and IAS 8 (Amendment). Definition of Material. This amendment is mandatory for annual periods beginning on or after January 1, 2020 under IFRS-IASB, earlier application is permitted. · Amendments to References to the Conceptual Frameworks in IFRS Standards. This Standard is applicable for annual periods beginning on or after January 1, 2020 under IFRS-IASB. The Company does not anticipate any significant impact on the consolidated condensed financial statements derived from the application of the new standards and amendments that will be effective for annual periods beginning on or after January 1, 2020, although it is currently still in the process of evaluating such application.
Use of estimates	Use of estimates Some of the accounting policies applied require the application of significant judgment by management to select the appropriate assumptions to determine these estimates. These assumptions and estimates are based on the Company´s historical experience, advice from experienced consultants, forecasts and other circumstances and expectations as of the close of the financial period. The assessment is considered in relation to the global economic situation of the industries and regions where the Company operates, taking into account future development of our businesses. By their nature, these judgments are subject to an inherent degree of uncertainty; therefore, actual results could materially differ from the estimates and assumptions used. In such cases, the carrying values of assets and liabilities are adjusted. The most critical accounting policies, which reflect significant management estimates and judgment to determine amounts in these consolidated condensed interim financial statements, are as follows: • Contracted concessional agreements. • Impairment of intangible assets and property, plant and equipment. • Assessment of control. • Derivative financial instruments and fair value estimates. • Income taxes and recoverable amount of deferred tax assets. As of the date of preparation of these consolidated condensed interim financial statements, no relevant changes in the estimates made are anticipated and, therefore, no significant changes in the value of the assets and liabilities recognized at March 31, 2019 are expected. Although these estimates and assumptions are being made using all available facts and circumstances, it is possible that future events may require management to amend such estimates and assumptions in future periods. Changes in accounting estimates are recognized prospectively, in accordance with IAS 8, in the consolidated income statement of the period in which the change occurs.

Fair value of financial instr_2

Fair value of financial instruments (Policies)	3 Months Ended
	Mar. 31, 2019
Fair value of financial instruments [Abstract]
Fair value of financial instruments	Financial instruments measured at fair value are presented in accordance with the following level classification based on the nature of the inputs used for the calculation of fair value: • Level 1: Inputs are quoted prices in active markets for identical assets or liabilities. • Level 2: Fair value is measured based on inputs other than quoted prices included within Level 1 that are observable for the asset or liability, either directly (i.e. as prices) or indirectly (i.e. derived from prices). • Level 3: Fair value is measured based on unobservable inputs for the asset or liability. As of March 31, 2019, and December 31, 2018, all the financial instruments measured at fair value correspond to derivatives and have been classified as Level 2.

Nature of the business (Tables)

Nature of the business (Tables)	3 Months Ended
	Mar. 31, 2019
Nature of the business [Abstract]
Overview of concessional assets	The following table provides an overview of the concessional assets the Company owned as of March 31, 2019: Assets Type Ownership Location Currency (8) Capacity (Gross) Counterparty Credit Ratings (9) COD* Contract Years Left (13) Solana Renewable (Solar) 100% Class B (1) Arizona (USA) USD 280 MW A-/A2/A- 2013 25 Mojave Renewable (Solar) 100 % California (USA) USD 280 MW D/WR/WD 2014 21 Solaben 2 & 3 Renewable (Solar) 70 % (2) Spain Euro 2x50 MW A-/Baa1/A- 2012 19/18 Solacor 1 & 2 Renewable (Solar) 87 % (3) Spain Euro 2x50 MW A-/Baa1/A- 2012 18/18 PS10/PS20 Renewable (Solar) 100 % Spain Euro 31 MW A-/Baa1/A- 2007&2009 13/15 Helioenergy 1 & 2 Renewable (Solar) 100 % Spain Euro 2x50 MW A-/Baa1/A- 2011 18/18 Helios 1 & 2 Renewable (Solar) 100 % Spain Euro 2x50 MW A-/Baa1/A- 2012 19/19 Solnova 1, 3 & 4 Renewable (Solar) 100 % Spain Euro 3x50 MW A-/Baa1/A- 2010 16/16/17 Solaben 1 & 6 Renewable (Solar) 100 % Spain Euro 2x50 MW A-/Baa1/A- 2013 20/20 Kaxu Renewable (Solar) 51 % (4) South Africa Rand 100 MW BB/Baa3/ BB+ (10) 2015 16 Palmatir Renewable (Wind) 100 % Uruguay USD 50 MW BBB/Baa2/BBB- (11) 2014 15 Cadonal Renewable (Wind) 100 % Uruguay USD 50 MW BBB/Baa2/BBB- (11) 2014 16 Melowind Renewable (Wind) 100 % Uruguay USD 50MW BBB/Baa2/BBB- 2015 17 Mini-Hydro Renewable (Hydraulic) 100 % Peru USD 4 MW BBB+/A3/ BBB+ 2012 14 ACT Efficient natural gas 100 % Mexico USD 300 MW BBB+/ Baa3/BBB- 2013 14 ATN (12) Transmission line 100 % Peru USD 365 miles BBB+/A3/BBB+ 2011 22 ATS Transmission line 100 Peru USD 569 miles BBB+/A3/BBB+ 2014 25 ATN 2 Transmission line 100 Peru USD 81 miles Not rated 2015 14 Quadra 1 Transmission line 100 % Chile USD 49 miles Not rated 2014 16 Quadra 2 Transmission line 100 % Chile USD 32 miles Not rated 2014 16 Palmucho Transmission line 100 % Chile USD 6 miles BBB+/Baa1/ BBB+ 2007 19 Chile TL3 Transmission line 100 % Chile USD 50 miles A+/A1/A+ 1993 Regulated Skikda Water 34.2 % (5) Algeria USD 3.5 M ft3/day Not rated 2009 15 Honaine Water 25.5 % (6) Algeria USD 7 M ft3/ day Not rated 2012 19 Seville PV Renewable (Solar) 80 % (7) Spain Euro 1 MW A-/Baa1/A- 2006 17 (1) On September 30, 2013, Liberty Interactive Corporation agreed to invest $300 million in Class A shares of ASO Holdings Company LLC, the holding company of Solana, in exchange for a share of the dividends and the taxable losses generated by Solana. (2) Itochu Corporation, a Japanese trading company, holds 30% of the shares in each of Solaben 2 and Solaben 3. (3) JGC, a Japanese engineering company, holds 13% of the shares in each of Solacor 1 and Solacor 2. (4) Kaxu is owned by the Company (51%), Industrial Development Corporation of South Africa (29%) and Kaxu Community Trust (20%). (5) Algerian Energy Company, SPA owns 49% of Skikda and Sacyr Agua, S.L. owns the remaining 16.83%. (6) Algerian Energy Company, SPA owns 49% of Honaine and Sacyr Agua, S.L. owns the remaining 25.5%. (7) Instituto para la Diversificación y Ahorro de la Energía (“Idae”), a Spanish state owned company, holds 20% of the shares in Seville PV. (8) Certain contracts denominated in U.S. dollars are payable in local currency. (9) Reflects the counterparty’s credit ratings issued by Standard & Poor’s Ratings Services, or S&P, Moody’s Investors Service Inc., or Moody’s, and Fitch Ratings Ltd, or Fitch. (10) Refers to the credit rating of the Republic of South Africa. The offtaker is Eskom, which is a state-owned utility company in South Africa. (11) Refers to the credit rating of Uruguay, as UTE (Administración Nacional de Usinas y Transmisoras Eléctricas) is unrated. (12) Including the acquisition of ATN expansion 1. (13) As of December 31, 2018. (*) Commercial Operation Date.

Financial information by segm_2

Financial information by segment (Tables)	3 Months Ended
	Mar. 31, 2019
Financial information by segment [Abstract]
Revenues and Further Adjusted EBITDA, assets and liabilities by operating segments and business sectors	a) The following tables show Revenues and Further Adjusted EBITDA by operating segments and business sectors for the three-month period ended March 31, 2019 and 2018: Revenue Further Adjusted EBITDA For the three-month period ended March 31, For the three-month period ended March 31, ($ in thousands) Geography 2019 2018 2019 2018 North America 60,441 61,781 50,870 60,247 South America 33,493 29,536 28,212 24,180 EMEA 127,518 133,948 100,007 93,541 Total 221,452 225,265 179,089 177,968 Revenue Further Adjusted EBITDA For the three-month period ended March 31, For the three-month period ended March 31, ($ in thousands) Business sector 2019 2018 2019 2018 Renewable energy 156,817 167,225 123,484 131,435 Efficient natural gas 34,009 28,387 30,476 23,330 Electric transmission lines 24,867 23,840 21,650 19,836 Water 5,759 5,813 3,479 3,367 Total 221,452 225,265 179,089 177,968 The reconciliation of segment Further Adjusted EBITDA with the profit/(loss) attributable to the Company is as follows: For the three-month period ended March 31, ($ in thousands) 2019 2018 Loss attributable to the Company $ (8,957 ) (4,764 ) Profit attributable to non-controlling interests 5,267 3,254 Income tax 9,577 4,650 Share of (profits)/losses of associates (1,823 ) (1,407 ) Financial expense, net 99,289 101,611 Depreciation, amortization, and impairment charges 75,736 74,624 Total segment Further Adjusted EBITDA $ 179,089 177,968
Assets and liabilities by geography	b) The assets and liabilities by operating segments (and business sector) as of March 31, 2019 and December 31, 2018 are as follows: Assets and liabilities by geography as of March 31, 2019: North America South America EMEA Balance as of March 31, 2019 ($ in thousands) Assets allocated Contracted concessional assets 3,419,111 1,200,662 3,769,735 8,389,508 Investments carried under the equity method - - 54,777 54,777 Current financial investments 140,258 70,948 30,338 241,544 Cash and cash equivalents (project companies) 156,085 40,526 349,772 546,383 Subtotal allocated 3,715,454 1,312,136 4,204,622 9,232,212 Unallocated assets Other non-current assets 217,591 Other current assets (including cash and cash equivalents at holding company level) 370,040 Subtotal unallocated 587,631 Total assets 9,819,843 North America South America EMEA Balance as of March 31, 2019 ($ in thousands) Liabilities allocated Long-term and short-term project debt 1,734,366 897,807 2,444,179 5,076,352 Grants and other liabilities 1,518,669 8,364 126,290 1,653,323 Subtotal allocated 3,253,035 906,171 2,570,469 6,729,675 Unallocated liabilities Long-term and short-term corporate debt 697,545 Other non-current liabilities 560,833 Other current liabilities 166,787 Subtotal unallocated 1,425,165 Total liabilities 8,154,840 Equity unallocated 1,665,003 Total liabilities and equity unallocated 3,090,168 Total liabilities and equity 9,819,843 Assets and liabilities by geography as of December 31, 2018: North America South America EMEA Balance as of December 31, 2018 ($ in thousands) Assets allocated Contracted concessional assets 3,453,652 1,210,624 3,884,905 8,549,181 Investments carried under the equity method - - 53,419 53,419 Current financial investments 147,213 61,959 30,080 239,252 Cash and cash equivalents (project companies) 195,678 41,316 287,456 524,450 Subtotal allocated 3,796,543 1,313,899 4,255,860 9,366,302 Unallocated assets Other non-current assets 188,736 Other current assets (including cash and cash equivalents at holding company level) 363,993 Subtotal unallocated 552,729 Total assets 9,919,031 North America South America EMEA Balance as of December 31, 2018 ($ in thousands) Liabilities allocated Long-term and short-term project debt 1,725,961 900,801 2,464,352 5,091,114 Grants and other liabilities 1,527,724 7,550 122,852 1,658,126 Subtotal allocated 3,253,685 908,351 2,587,204 6,749,240 Unallocated liabilities Long-term and short-term corporate debt 684,073 Other non-current liabilities 523,827 Other current liabilities 205,779 Subtotal unallocated 1,413,679 Total liabilities 8,162,919 Equity unallocated 1,756,112 Total liabilities and equity unallocated 3,169,791 Total liabilities and equity 9,919,031
Assets and liabilities by business sector	Assets and liabilities by business sector as of March 31, 2019: Renewable energy Efficient natural gas Electric transmission lines Water Balance as of March 31, 2019 ($ in thousands) Assets allocated Contracted concessional assets 6,844,804 581,808 876,781 86,115 8,389,508 Investments carried under the equity method 10,114 - - 44,663 54,777 Current financial investments 15,083 140,237 70,091 16,133 241,544 Cash and cash equivalents (project companies) 491,723 28,612 13,586 12,462 546,383 Subtotal allocated 7,361,724 750,657 960,458 159,373 9,232,212 Unallocated assets Other non-current assets 217,591 Other current assets (including cash and cash equivalents at holding company level) 370,040 Subtotal unallocated 587,631 Total assets 9,819,843 Renewable energy Efficient natural gas Electric transmission lines Water Balance as of March 31, 2019 ($ in thousands) Liabilities allocated Long-term and short-term project debt 3,857,857 540,695 649,802 27,998 5,076,352 Grants and other liabilities 1,651,442 151 959 771 1,653,323 Subtotal allocated 5,509,299 540,846 650,761 28,769 6,729,675 Unallocated liabilities Long-term and short-term corporate debt 697,545 Other non-current liabilities 560,833 Other current liabilities 166,787 Subtotal unallocated 1,425,165 Total liabilities 8,154,840 Equity unallocated 1,665,003 Total liabilities and equity unallocated 3,090,168 Total liabilities and equity 9,819,843 Assets and liabilities by business sector as of December 31, 2018: Renewable energy Efficient natural gas Electric transmission lines Water Balance as of December 31, 2018 ($ in thousands) Assets allocated Contracted concessional assets 6,998,020 580,997 882,980 87,184 8,549,181 Investments carried under the equity method 10,257 - - 43,162 53,419 Current financial investments 15,396 147,192 61,102 15,562 239,252 Cash and cash equivalents (project companies) 453,096 45,625 14,043 11,686 524,450 Subtotal allocated 7,476,769 773,814 958,125 157,594 9,366,302 Unallocated assets Other non-current assets 188,736 Other current assets (including cash and cash equivalents at holding company level) 363,993 Subtotal unallocated 552,729 Total assets 9,919,031 Renewable energy Efficient natural gas Electric transmission lines Water Balance as of December 31, 2018 ($ in thousands) Liabilities allocated Long-term and short-term project debt 3,868,626 545,123 647,820 29,545 5,091,114 Grants and other liabilities 1,656,146 161 1,025 794 1,658,126 Subtotal allocated 5,524,772 545,284 648,845 30,339 6,749,240 Unallocated liabilities Long-term and short-term corporate debt 684,073 Other non-current liabilities 523,827 Other current liabilities 205,779 Subtotal unallocated 1,413,679 Total liabilities 8,162,919 Equity unallocated 1,756,112 Total liabilities and equity unallocated 3,169,791 Total liabilities and equity 9,919,031
Depreciation, amortization and impairment charges recognized	c) The amount of depreciation, amortization and impairment charges recognized for the three-month periods ended March 31, 2019 and 2018 are as follows: For the three-month period ended March 31, Depreciation, amortization and impairment by geography 2019 2018 ($ in thousands) North America (26,583 ) (23,861 ) South America (11,251 ) (10,197 ) EMEA (37,902 ) (40,566 ) Total (75,736 ) (74,624 ) For the three-month period ended March 31, Depreciation, amortization and impairment by business sectors 2019 2018 ($ in thousands) Renewable energy (72,139 ) (67,554 ) Electric transmission lines (6,134 ) (7,070 ) Efficent natual gas 2,537 - Total (75,736 ) (74,624 )

Changes in the scope of the c_2

Changes in the scope of the consolidated financial statements (Tables)	3 Months Ended
	Mar. 31, 2019
Changes in the scope of the consolidated condensed interim financial statements [Abstract]
Amount of assets and liabilities integrated at the effective acquisition date	The amount of assets and liabilities integrated at the effective acquisition date for the aggregated change in scope is shown in the following table: Asset Acquisition for the year ended December 31, 2018 ($ in thousands) Concessional assets 155,909 Investments carried under the equity method 1 Current assets 5,646 Project debt long term (79,016 ) Deferred tax liabilities (590 ) Project debt short term (2,346 ) Other current and non-current liabilities (3,000 ) Asset acquisition - purchase price (76,604 ) Net result of the asset acquisition -

Contracted concessional assets

Contracted concessional assets (Tables)	3 Months Ended
	Mar. 31, 2019
Contracted concessional assets [Abstract]
Movements of contracted concessional assets	The detail of contracted concessional assets included in the heading ‘Contracted concessional assets’ as of March 31, 2019 and December 31, 2018 is as follows: Balance as of March 31, Balance as of December 31, 2019 2018 ($ in thousands) Contracted concessional assets cost 10,373,619 10,475,828 Amortization and impairment (1,984,111 ) (1,926,647 ) Total 8,389,508 8,549,181

Investments carried under the_2

Investments carried under the equity method (Tables)	3 Months Ended
	Mar. 31, 2019
Investments carried under the equity method [Abstract]
Investments in associates	The table below shows the breakdown of the investments held in associates as of March 31, 2019 and December 31, 2018: Balance as of March 31, Balance as of December 31, 2019 2018 ($ in thousands) Evacuación Valdecaballeros, S.L. 8,652 8,773 Myah Bahr Honaine, S.P.A.(*) 44,663 43,161 Pectonex, R.F. Proprietary Limited 1,461 1,485 ABY Infraestructuras, S.L. 1 - Ca Ku A1, S.A.P.I. de CV (PTS) - - Evacuación Villanueva del Rey, S.L - - Total 54,777 53,419 (*) Myah Bahr Honaine, S.P.A., the project entity, is 51% owned by Geida Tlemcen, S.L. which is accounted for using the equity method in these consolidated condensed interim financial statements. Geida Tlemcen, S.L. is 50% owned by Atlantica.

Financial investments (Tables)

Financial investments (Tables)	3 Months Ended
	Mar. 31, 2019
Financial investments [Abstract]
Non-current and Current financial investments	The detail of Non-current and Current financial investments as of March 31, 2019 and December 31, 2018 is as follows: Balance as of March 31, 2019 Balance as of December 31, 2018 ($ in thousands) Fair Value through OCI (Investment in Ten West link) 6,034 6,034 Derivative assets 6,297 11,571 Other receivable accounts at amortized cost 53,055 35,065 Total non-current financial investments 65,386 52,670 Contracted concessional financial assets 152,230 159,128 Derivative assets 1,481 1,582 Other receivable accounts at amortized cost 89,314 80,124 Total current financial investments 243,025 240,834

Derivative financial instrume_2

Derivative financial instruments (Tables)	3 Months Ended
	Mar. 31, 2019
Derivative financial instruments [Abstract]
Fair value amount of derivative financial instruments	The breakdowns of the fair value amount of the derivative financial instruments as of March 31, 2019 and December 31, 2018 are as follows: Balance as of March 31, 2019 Balance as of December 31, 2018 ($ in thousands) Assets Liabilities Assets Liabilities Interest rate - cash flow hedge 3,879 305,138 9,923 279,152 Foreign exchange derivative instruments 3,899 - 3,230 - Total 7,778 305,138 13,153 279,152

Related parties (Tables)

Related parties (Tables)	3 Months Ended
	Mar. 31, 2019
Related parties [Abstract]
Related party receivables and payables	Details of balances with related parties as of March 31, 2019 and December 31, 2018, which therefore do not include balances with Abengoa, are as follows: Balance as of March 31, Balance as of December 31, 2019 2018 ($ in thousands) Credit receivables (current) 4,044 5,328 Total current receivables with related parties 4,044 5,328 Trade payables (current) 25,139 19,352 Total current payables with related parties 25,139 19,352 Credit payables (non-current) 28,434 33,675 Total non-current payables with related parties 28,434 33,675
Related party transactions	The transactions carried out with related parties, which are primarily transactions with Abengoa and with subsidiaries of Abengoa, during the three-month periods ended March 31, 2018, have been as follows: For the three-month period ended March 31, 2019 2018 ($ in thousands) Services received - (26,541 ) Financial income 7 1,386 Financial expenses (183 ) (341 )

Trade and other receivables (Ta

Trade and other receivables (Tables)	3 Months Ended
	Mar. 31, 2019
Trade and other receivables [Abstract]
Trade and other receivables	Trade and other receivables as of March 31, 2019 and December 31, 2018, consist of the following: Balance as of March 31, Balance as of December 31, 2019 2018 ($ in thousands) Trade receivables 177,841 163,856 Tax receivables 35,062 54,959 Prepayments 19,342 5,521 Other accounts receivable 9,167 12,059 Total 241,412 236,395

Corporate debt (Tables)

Corporate debt (Tables)	3 Months Ended
	Mar. 31, 2019
Corporate debt [Abstract]
Corporate debt	The breakdown of the corporate debt as of March 31, 2019 and December 31, 2018 is as follows: Balance as of Mach 31, Balance as of December 31, 2019 2018 ($ in thousands) Non-current 423,921 415,168 Current 273,624 268,905 Total Corporate Debt 697,545 684,073
Repayment schedule for corporate debt	The repayment schedule for the corporate debt as of March 31, 2019 is as follows: Remainder of 2019 Between January and March 2020 2021 2022 2023 Subsequent years Total ($ in thousands) New Revolving Credit Facility - - 122,761 - - - 122,761 Note Issuance Facility 422 - 100,902 100,166 100,092 301,582 2017 Credit Facility 11,203 - - - - - 11,203 2019 Notes 261,999 - - - - - 261,999 Total 273,624 - 122,761 100,902 100,166 100,092 697,545

Project debt (Tables)

Project debt (Tables)	3 Months Ended
	Mar. 31, 2019
Project debt [Abstract]
Project debt	The breakdown of project debt for both non-current and current liabilities as of March 31, 2019 and December 31, 2018 is as follows: Balance as of March 31, Balance as of December 31, 2019 2018 ($ in thousands) Non-current 4,769,119 4,826,659 Current 307,233 264,455 Total Project debt 5,076,352 5,091,114
Repayment schedule for project debt	The repayment schedule for project debt in accordance with the financing arrangements, as of March 31, 2019 is as follows and is consistent with the projected cash flows of the related projects: Remainder of 2019 Payment of interests accrued as of March 31, 2019 Nominal repayment Between January and March 2020 Between April and December 2020 2021 2022 2023 Subsequent Years Total ($ in thousands) 64,135 226,100 16,998 236,207 265,416 296,067 321,564 3,649,865 5,076,352

Grants and other liabilities (T

Grants and other liabilities (Tables)	3 Months Ended
	Mar. 31, 2019
Grants and other liabilities [Abstract]
Grants and other non-current liabilities	Balance as of March 31, Balance as of December 31, 2019 2018 ($ in thousands) Grants 1,134,944 1,150,805 Other Liabilities 518,379 507,321 Grant and other non-current liabilities 1,653,323 1,658,126

Trade payables and other curr_2

Trade payables and other current liabilities (Tables)	3 Months Ended
	Mar. 31, 2019
Trade payables and other current liabilities [Abstract]
Trade payable and other current liabilities	Trade payable and other current liabilities as of March 31, 2019 and December 31, 2018 are as follows: Balance as of March 31, Balance as of December 31, 2019 2018 ($ in thousands) Trade accounts payable 71,367 109,430 Down payments from clients 6,249 6,289 Liberty (see Note 16) 37,119 37,119 Other accounts payable 36,728 39,195 Total 151,463 192,033

Financial income and expenses (

Financial income and expenses (Tables)	3 Months Ended
	Mar. 31, 2019
Financial income and expenses [Abstract]
Financial income	The following table sets forth our financial income and expenses for the three-month period ended March 31, 2019 and 2018: For the three-month period ended March 31, Financial income 2019 2018 ($ in thousands) Interest income from loans and credits 173 119 Interest rates benefits derivatives: cash flow hedges 113 177 Total 286 296
Financial expenses	For the three-month period ended March 31, Financial expenses 2019 2018 Expenses due to interest: ($ in thousands) - Loans from credit entities (63,233 ) (63,751 ) - Other debts (23,822 ) (18,468 ) Interest rates losses derivatives: cash flow hedges (14,448 ) (17,848 ) Total (101,503 ) (100,067 )
Other net financial income and expenses	The following table sets out ‘Other net financial income and expenses” for the three-month periods ended March 31, 2019, and 2018: For the three-month period ended March 31, Other financial income / (expenses) 2019 2018 ($ in thousands) Other financial income 5,633 2,171 Other financial losses (4,571 ) (3,831 ) Total 1,062 (1,660 )

Other operating income and ex_2

Other operating income and expenses (Tables)	3 Months Ended
	Mar. 31, 2019
Other operating income and expenses [Abstract]
Other operating income	The table below shows the detail of Other operating income and expenses for the three-month periods ended March 31, 2019, and 2018: Other Operating income For the three-month period ended March 31, 2019 2018 ($ in thousands) Grants (see Note 16) 14,789 14,857 Income from various services and insurance proceeds 11,650 13,557 Total 26,439 28,414
Other operating expenses	Other Operating expenses For the three-month period ended March 31, 2019 2018 ($ in thousands) Leases and fees (731 ) (743 ) Operation and maintenance (33,817 ) (32,444 ) Independent professional services (8,833 ) (7,091 ) Supplies (6,865 ) (7,391 ) Insurance (6,112 ) (6,443 ) Levies and duties (3,069 ) (9,909 ) Other expenses (1,146 ) (2,173 ) Total (60,573 ) (66,194 )

Earnings per share (Tables)

Earnings per share (Tables)	3 Months Ended
	Mar. 31, 2019
Earnings per share [Abstract]
Earnings per share	Basic earnings per share have been calculated by dividing the loss attributable to equity holders by the average number of shares outstanding. Diluted earnings per share equals basic earnings per share for the periods presented. Item For the three-month period ended March 31, 2019 2018 ($ in thousands) Profit/ (loss) from continuing operations attributable to Atlantica Yield Plc. (8,957 ) (4,764 ) Average number of ordinary shares outstanding (thousands) - basic and diluted 100,217 100,217 Earnings per share from continuing operations (U.S. dollar per share) - basic and diluted (0.09 ) (0.05 ) Earnings per share from profit/(loss) for the period (U.S. dollar per share) - basic and diluted (0.09 ) (0.05 )

Nature of the business, Descrip

Nature of the business, Description (Details) - Algonquin [Member]	Nov. 27, 2018	Mar. 09, 2018	Mar. 31, 2018	Mar. 31, 2019	Dec. 31, 2018
Nature of the business [Abstract]
Percentage of non-controlling interests	16.47%	25.00%
Ownership interest			25.00%	41.47%	41.47%

Nature of the business, Assets

Nature of the business, Assets acquired (Details) $ in Millions		Jan. 29, 2019USD ($)	Dec. 14, 2018USD ($)MW	Dec. 11, 2018USD ($)kV	Feb. 28, 2018USD ($)MW	Mar. 31, 2019	Dec. 28, 2018USD ($)	Oct. 10, 2018USD ($)
Befesa Agua Tenes, S.L.U. [Member]
Nature of the business [Abstract]
Ownership interest		51.00%
Equity value of agreed price		$ 24.5
Consideration payment advanced		$ 19.9
Interest rate		12.00%
Chile TL3 [Member]
Nature of the business [Abstract]
Gross capacity | kV				66
Acquisition purchase price				$ 6
Ownership interest						100.00%
ATN [Member]
Nature of the business [Abstract]
Acquisition purchase price							$ 16
Ownership interest	[1]					100.00%
Melowind [Member]
Nature of the business [Abstract]
Percentage interest acquired			100.00%
Gross capacity | MW			50
Acquisition purchase price			$ 45
Ownership interest						100.00%
Mini- Hydro [Member]
Nature of the business [Abstract]
Percentage interest acquired					100.00%
Gross capacity | MW					4
Acquisition purchase price					$ 9
Ownership interest						100.00%
PTS [Member]
Nature of the business [Abstract]
Percentage interest acquired								5.00%
Acquisition purchase price								$ 7
[1]	Including the acquisition of ATN expansion 1.

Nature of the business, Concess

Nature of the business, Concessional assets owned (Details) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2019	Sep. 30, 2013
ACT [Member]
Nature of the business [Abstract]
Type		Efficient natural gas
Ownership		100.00%
Location		Mexico
Currency	[1]	USD
Capacity (gross)		300 MW
Counterparty credit ratings	[2]	BBB+/ Baa3/BBB-
COD	[3]	2013
Contract years left	[4]	14 years
ATN [Member]
Nature of the business [Abstract]
Type	[5]	Transmission line
Ownership	[5]	100.00%
Location	[5]	Peru
Currency	[1],[5]	USD
Capacity (gross)	[5]	365 miles
Counterparty credit ratings	[2],[5]	BBB+/A3/BBB+
COD	[3],[5]	2011
Contract years left	[4],[5]	22 years
ATS [Member]
Nature of the business [Abstract]
Type		Transmission line
Ownership		100.00%
Location		Peru
Currency	[1]	USD
Capacity (gross)		569 miles
Counterparty credit ratings	[2]	BBB+/A3/BBB+
COD	[3]	2014
Contract years left	[4]	25 years
ATN2 [Member]
Nature of the business [Abstract]
Type		Transmission line
Ownership		100.00%
Location		Peru
Currency	[1]	USD
Capacity (gross)		81 miles
Counterparty credit ratings	[2]	Not rated
COD	[3]	2015
Contract years left	[4]	14 years
Quadra 1 [Member]
Nature of the business [Abstract]
Type		Transmission line
Ownership		100.00%
Location		Chile
Currency	[1]	USD
Capacity (gross)		49 miles
Counterparty credit ratings	[2]	Not rated
COD	[3]	2014
Contract years left	[4]	16 years
Quadra 2 [Member]
Nature of the business [Abstract]
Type		Transmission line
Ownership		100.00%
Location		Chile
Currency	[1]	USD
Capacity (gross)		32 miles
Counterparty credit ratings	[2]	Not rated
COD	[3]	2014
Contract years left	[4]	16 years
Palmucho [Member]
Nature of the business [Abstract]
Type		Transmission line
Ownership		100.00%
Location		Chile
Currency	[1]	USD
Capacity (gross)		6 miles
Counterparty credit ratings	[2]	BBB+/Baa1/BBB+
COD	[3]	2007
Contract years left	[4]	19 years
Chile TL3 [Member]
Nature of the business [Abstract]
Type		Transmission line
Ownership		100.00%
Location		Chile
Currency	[1]	USD
Capacity (gross)		50 miles
Counterparty credit ratings	[2]	A+/A1/A+
COD	[3]	1993
Skikda [Member]
Nature of the business [Abstract]
Type		Water
Ownership	[6]	34.20%
Location		Algeria
Currency	[1]	USD
Capacity (gross)		3.5 M ft3/day
Counterparty credit ratings	[2]	Not rated
COD	[3]	2009
Contract years left	[4]	15 years
Skikda [Member] | Algerian Energy Company, SPA [Member]
Nature of the business [Abstract]
Percentage of non-controlling interests		49.00%
Skikda [Member] | Sadyt [Member]
Nature of the business [Abstract]
Percentage of non-controlling interests		16.83%
Honaine [Member]
Nature of the business [Abstract]
Type		Water
Ownership	[7]	25.50%
Location		Algeria
Currency	[1]	USD
Capacity (gross)		7 M ft3/day
Counterparty credit ratings	[2]	Not rated
COD	[3]	2012
Contract years left	[4]	19 years
Honaine [Member] | Algerian Energy Company, SPA [Member]
Nature of the business [Abstract]
Percentage of non-controlling interests		49.00%
Honaine [Member] | Sadyt [Member]
Nature of the business [Abstract]
Percentage of non-controlling interests		25.50%
PS10/PS20 [Member]
Nature of the business [Abstract]
Type		Renewable (Solar)
Ownership		100.00%
Location		Spain
Currency	[1]	Euro
Capacity (gross)		31 MW
Counterparty credit ratings	[2]	A-/Baa1/A-
COD	[3]	2007& 2009
PS10 [Member]
Nature of the business [Abstract]
Contract years left	[4]	13 years
PS20 [Member]
Nature of the business [Abstract]
Contract years left	[4]	15 years
Solana [Member]
Nature of the business [Abstract]
Type		Renewable (Solar)
Ownership		100.00%
Ownership interest type	[8]	Class B
Location		Arizona (USA)
Currency	[1]	USD
Capacity (gross)		280 MW
Counterparty credit ratings	[2]	A-/A2/A-
COD	[3]	2013
Contract years left	[4]	25 years
Solana [Member] | Liberty Interactive Corporation [Member]
Nature of the business [Abstract]
Class A membership investment			$ 300
Mojave [Member]
Nature of the business [Abstract]
Type		Renewable (Solar)
Ownership		100.00%
Location		California (USA)
Currency	[1]	USD
Capacity (gross)		280 MW
Counterparty credit ratings	[2]	D/WR/WD
COD	[3]	2014
Contract years left	[4]	21 years
Solaben 2 & 3 [Member]
Nature of the business [Abstract]
Type		Renewable (Solar)
Ownership	[9]	70.00%
Location		Spain
Currency	[1]	Euro
Capacity (gross)		2x50 MW
Counterparty credit ratings	[2]	A-/Baa1/A-
COD	[3]	2012
Solaben 2 & 3 [Member] | Itochu Corporation [Member]
Nature of the business [Abstract]
Percentage of non-controlling interests		30.00%
Solaben 2 [Member]
Nature of the business [Abstract]
Contract years left	[4]	19 years
Solaben 3 [Member]
Nature of the business [Abstract]
Contract years left	[4]	18 years
Solacor 1 & 2 [Member]
Nature of the business [Abstract]
Type		Renewable (Solar)
Ownership	[10]	87.00%
Location		Spain
Currency	[1]	Euro
Capacity (gross)		2x50 MW
Counterparty credit ratings	[2]	A-/Baa1/A-
COD	[3]	2012
Solacor 1 & 2 [Member] | JGC [Member]
Nature of the business [Abstract]
Percentage of non-controlling interests		13.00%
Solacor 1 [Member]
Nature of the business [Abstract]
Contract years left		18 years
Solacor 2 [Member]
Nature of the business [Abstract]
Contract years left		18 years
Helioenergy 1 & 2 [Member]
Nature of the business [Abstract]
Type		Renewable (Solar)
Ownership		100.00%
Location		Spain
Currency	[1]	Euro
Capacity (gross)		2x50 MW
Counterparty credit ratings	[2]	A-/Baa1/A-
COD	[3]	2011
Helioenergy 1 [Member]
Nature of the business [Abstract]
Contract years left		18 years
Helioenergy 2 [Member]
Nature of the business [Abstract]
Contract years left		18 years
Helios 1 & 2 [Member]
Nature of the business [Abstract]
Type		Renewable (Solar)
Ownership		100.00%
Location		Spain
Currency	[1]	Euro
Capacity (gross)		2x50 MW
Counterparty credit ratings	[2]	A-/Baa1/A-
COD	[3]	2012
Helios 1 [Member]
Nature of the business [Abstract]
Contract years left		19 years
Helios 2 [Member]
Nature of the business [Abstract]
Contract years left		19 years
Solnova 1, 3 & 4 [Member]
Nature of the business [Abstract]
Type		Renewable (Solar)
Ownership		100.00%
Location		Spain
Currency	[1]	Euro
Capacity (gross)		3x50 MW
Counterparty credit ratings	[2]	A-/Baa1/A-
COD	[3]	2010
Solnova 1 [Member]
Nature of the business [Abstract]
Contract years left	[4]	16 years
Solnova 3 [Member]
Nature of the business [Abstract]
Contract years left	[4]	16 years
Solnova 4 [Member]
Nature of the business [Abstract]
Contract years left	[4]	17 years
Solaben 1 & 6 [Member]
Nature of the business [Abstract]
Type		Renewable (Solar)
Ownership		100.00%
Location		Spain
Currency	[1]	Euro
Capacity (gross)		2x50 MW
Counterparty credit ratings	[2]	A-/Baa1/A-
COD	[3]	2013
Solaben 1 [Member]
Nature of the business [Abstract]
Contract years left		20 years
Solaben 6 [Member]
Nature of the business [Abstract]
Contract years left		20 years
Seville PV [Member]
Nature of the business [Abstract]
Type		Renewable (Solar)
Ownership	[11]	80.00%
Location		Spain
Currency	[1]	Euro
Capacity (gross)		1 MW
Counterparty credit ratings	[2]	A-/Baa1/A-
COD	[3]	2006
Contract years left	[4]	17 years
Seville PV [Member] | Idae [Member]
Nature of the business [Abstract]
Percentage of non-controlling interests		20.00%
Kaxu [Member]
Nature of the business [Abstract]
Type		Renewable (Solar)
Ownership	[12]	51.00%
Location		South Africa
Currency	[1]	Rand
Capacity (gross)		100 MW
Counterparty credit ratings	[2],[13]	BB/Baa3/BB-
COD	[3]	2015
Contract years left	[4]	16 years
Kaxu [Member] | IDC [Member]
Nature of the business [Abstract]
Percentage of non-controlling interests		29.00%
Kaxu [Member] | Kaxu Community Trust [Member]
Nature of the business [Abstract]
Percentage of non-controlling interests		20.00%
Palmatir [Member]
Nature of the business [Abstract]
Type		Renewable (Wind)
Ownership		100.00%
Location		Uruguay
Currency	[1]	USD
Capacity (gross)		50 MW
Counterparty credit ratings	[2],[14]	BBB/Baa2/BBB-
COD	[3]	2014
Contract years left	[4]	15 years
Cadonal [Member]
Nature of the business [Abstract]
Type		Renewable (Wind)
Ownership		100.00%
Location		Uruguay
Currency	[1]	USD
Capacity (gross)		50 MW
Counterparty credit ratings	[2],[14]	BBB/Baa2/BBB-
COD	[3]	2014
Contract years left	[4]	16 years
Melowind [Member]
Nature of the business [Abstract]
Type		Renewable (Wind)
Ownership		100.00%
Location		Uruguay
Currency	[1]	USD
Capacity (gross)		50MW
Counterparty credit ratings	[2]	BBB/Baa2/BBB-
COD	[3]	2015
Contract years left	[4]	17 years
Mini-Hydro [Member]
Nature of the business [Abstract]
Type		Renewable (Hydraulic)
Ownership		100.00%
Location		Peru
Currency	[1]	USD
Capacity (gross)		4 MW
Counterparty credit ratings	[2]	BBB+/A3/ BBB+-
COD	[3]	2012
Contract years left	[4]	14 years
[1]	Certain contracts denominated in U.S. dollars are payable in local currency.
[2]	Reflects the counterparty's credit ratings issued by Standard & Poor's Ratings Services, or S&P, Moody's Investors Service Inc., or Moody's, and Fitch Ratings Ltd, or Fitch.
[3]	Commercial Operation Date ("COD").
[4]	As of December 31, 2018.
[5]	Including the acquisition of ATN expansion 1.
[6]	Algerian Energy Company, SPA owns 49% of Skikda and Sacyr Agua, S.L. owns the remaining 16.83%.
[7]	Algerian Energy Company, SPA owns 49% of Honaine and Sacyr Agua, S.L. owns the remaining 25.5%.
[8]	On September 30, 2013, Liberty Interactive Corporation agreed to invest $300 million in Class A shares of ASO Holdings Company LLC, the holding company of Solana, in exchange for a share of the dividends and the taxable losses generated by Solana.
[9]	Itochu Corporation, a Japanese trading company, holds 30% of the shares in each of Solaben 2 and Solaben 3.
[10]	JGC, a Japanese engineering company, holds 13% of the shares in each of Solacor 1 and Solacor 2.
[11]	Instituto para la Diversificacion y Ahorro de la Energia ("Idae"), a Spanish state owned company, holds 20% of the shares in Seville PV.
[12]	Kaxu is owned by the Company (51%), Industrial Development Corporation of South Africa (29%) and Kaxu Community Trust (20%).
[13]	Refers to the credit rating of the Republic of South Africa. The offtaker is Eskom, which is a state-owned utility company in South Africa.
[14]	Refers to the credit rating of Uruguay, as UTE (Administracion Nacional de Usinas y Transmisoras Electricas) is unrated.

Financial information by segm_3

Financial information by segment, Business sectors (Details) ft³ / d in Millions	Dec. 14, 2018MW	Mar. 31, 2019ft³ / dMWLineWindFarmPlantSolarPlatformmi
Melowind [Member]
Financial information by segment [Abstract]
Gross capacity	50
Renewable Energy [Member] | Solana [Member]
Financial information by segment [Abstract]
Number of contracted assets | Plant		1
Gross capacity		280
United States [Member] | Renewable Energy [Member] | Mojave [Member]
Financial information by segment [Abstract]
Number of contracted assets | Plant		1
Gross capacity		280
Spain [Member] | Renewable Energy [Member]
Financial information by segment [Abstract]
Number of contracted assets | SolarPlatform		8
Spain [Member] | Renewable Energy [Member] | PS10/PS20 [Member]
Financial information by segment [Abstract]
Gross capacity		31
Spain [Member] | Renewable Energy [Member] | Solacor 1 and Solacor 2 [Member]
Financial information by segment [Abstract]
Gross capacity		100
Spain [Member] | Renewable Energy [Member] | Solaben 2 and 3 [Member]
Financial information by segment [Abstract]
Gross capacity		100
Spain [Member] | Renewable Energy [Member] | Helioenergy 1 and 2 [Member]
Financial information by segment [Abstract]
Gross capacity		100
Spain [Member] | Renewable Energy [Member] | Helios 1 and 2 [Member]
Financial information by segment [Abstract]
Gross capacity		100
Spain [Member] | Renewable Energy [Member] | Solnova 1, 3 and 4 [Member]
Financial information by segment [Abstract]
Gross capacity		150
Spain [Member] | Renewable Energy [Member] | Solaben 1 and 6 [Member]
Financial information by segment [Abstract]
Gross capacity		100
Spain [Member] | Renewable Energy [Member] | Seville PV [Member]
Financial information by segment [Abstract]
Gross capacity		1
South Africa [Member] | Renewable Energy [Member] | Kaxu [Member]
Financial information by segment [Abstract]
Number of contracted assets | Plant		1
Gross capacity		100
Uruguay [Member] | Renewable Energy [Member] | Palmatir [Member]
Financial information by segment [Abstract]
Number of contracted assets | WindFarm		1
Gross capacity		50
Uruguay [Member] | Renewable Energy [Member] | Cadonal [Member]
Financial information by segment [Abstract]
Number of contracted assets | WindFarm		1
Gross capacity		50
Uruguay [Member] | Renewable Energy [Member] | Melowind [Member]
Financial information by segment [Abstract]
Number of contracted assets | WindFarm		1
Gross capacity		50
Mexico [Member] | Efficient Natural Gas [Member] | ACT [Member]
Financial information by segment [Abstract]
Gross capacity		300
Term of take-or-pay contract		20 years
Peru [Member] | Renewable Energy [Member]
Financial information by segment [Abstract]
Gross capacity		4
Peru [Member] | Electric Transmission Lines [Member] | ATN, ATS and ATN2 [Member]
Financial information by segment [Abstract]
Number of contracted assets | Line		3
Length of transmission lines | mi		1,015
Chile [Member] | Electric Transmission Lines [Member] | Quadra 1, Quadra 2, Palmucho and Chile TL3 [Member]
Financial information by segment [Abstract]
Number of contracted assets | Line		4
Length of transmission lines | mi		137
Algeria [Member] | Water [Member] | Honaine and Skikda [Member]
Financial information by segment [Abstract]
Number of contracted assets | Plant		2
Aggregate capacity | ft³ / d		10.5

Financial information by segm_4

Financial information by segment, Revenues and Further Adjusted EBITDA (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2019USD ($)Customer	Mar. 31, 2018USD ($)Customer
Financial information by segment [Abstract]
Number of customers representing more than 10% of total revenues | Customer	3	3
Revenue	$ 221,452	$ 225,265
Further Adjusted EBITDA	$ 179,089	$ 177,968
Renewable Energy [Member]
Financial information by segment [Abstract]
Number of customers representing more than 10% of total revenues | Customer	2	2
Revenue	$ 156,817	$ 167,225
Further Adjusted EBITDA	$ 123,484	$ 131,435
Efficient Natural Gas [Member]
Financial information by segment [Abstract]
Number of customers representing more than 10% of total revenues | Customer	1	1
Revenue	$ 34,009	$ 28,387
Further Adjusted EBITDA	30,476	23,330
Electric Transmission Lines [Member]
Financial information by segment [Abstract]
Revenue	24,867	23,840
Further Adjusted EBITDA	21,650	19,836
Water [Member]
Financial information by segment [Abstract]
Revenue	5,759	5,813
Further Adjusted EBITDA	3,479	3,367
North America [Member]
Financial information by segment [Abstract]
Revenue	60,441	61,781
Further Adjusted EBITDA	50,870	60,247
South America [Member]
Financial information by segment [Abstract]
Revenue	33,493	29,536
Further Adjusted EBITDA	28,212	24,180
EMEA [Member]
Financial information by segment [Abstract]
Revenue	127,518	133,948
Further Adjusted EBITDA	$ 100,007	$ 93,541

Financial information by segm_5

Financial information by segment, Reconciliation of segment Further Adjusted EBITDA (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Financial information by segment [Abstract]
Loss attributable to the Company	$ (8,957)	$ (4,764)
Profit attributable to non-controlling interests	5,267	3,254
Income tax	9,577	4,650
Share of (profits)/losses of associates	1,823	1,407
Financial expense, net	99,289	101,611
Depreciation, amortization, and impairment charges	75,736	74,624
Total segment Further Adjusted EBITDA	179,089	177,968
Reconciling Item [Member]
Financial information by segment [Abstract]
Loss attributable to the Company	(8,957)	(4,764)
Profit attributable to non-controlling interests	5,267	3,254
Income tax	9,577	4,650
Share of (profits)/losses of associates	(1,823)	(1,407)
Financial expense, net	99,289	101,611
Depreciation, amortization, and impairment charges	75,736	74,624
Allocated [Member]
Financial information by segment [Abstract]
Total segment Further Adjusted EBITDA	$ 179,089	$ 177,968

Financial information by segm_6

Financial information by segment, Assets and liabilities by geography (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 2018	Dec. 31, 2017
Assets allocated [Abstract]
Contracted concessional assets	$ 8,389,508	$ 8,549,181
Investments carried under the equity method	54,777	53,419
Current financial investments	243,025	240,834
Cash and cash equivalents (project companies)	654,618	631,542	$ 755,902	$ 669,387
Total assets	9,819,843	9,919,031
Liabilities allocated [Abstract]
Long-term and short-term project debt	5,076,352	5,091,114
Grants and other liabilities	1,653,323	1,658,126
Long-term and short-term corporate debt	697,545	684,073
Total liabilities	8,154,840	8,162,919
Equity	1,665,003	1,756,112	$ 1,895,136	$ 1,884,967
Total liabilities and equity	9,819,843	9,919,031
North America [Member]
Assets allocated [Abstract]
Contracted concessional assets	3,419,111	3,453,652
Investments carried under the equity method	0	0
Current financial investments	140,258	147,213
Cash and cash equivalents (project companies)	156,085	195,678
Total assets	3,715,454	3,796,543
Liabilities allocated [Abstract]
Long-term and short-term project debt	1,734,366	1,725,961
Grants and other liabilities	1,518,669	1,527,724
Total liabilities	3,253,035	3,253,685
South America [Member]
Assets allocated [Abstract]
Contracted concessional assets	1,200,662	1,210,624
Investments carried under the equity method	0	0
Current financial investments	70,948	61,959
Cash and cash equivalents (project companies)	40,526	41,316
Total assets	1,312,136	1,313,899
Liabilities allocated [Abstract]
Long-term and short-term project debt	897,807	900,801
Grants and other liabilities	8,364	7,550
Total liabilities	906,171	908,351
EMEA [Member]
Assets allocated [Abstract]
Contracted concessional assets	3,769,735	3,884,905
Investments carried under the equity method	54,777	53,419
Current financial investments	30,338	30,080
Cash and cash equivalents (project companies)	349,772	287,456
Total assets	4,204,622	4,255,860
Liabilities allocated [Abstract]
Long-term and short-term project debt	2,444,179	2,464,352
Grants and other liabilities	126,290	122,852
Total liabilities	2,570,469	2,587,204
Allocated [Member]
Assets allocated [Abstract]
Contracted concessional assets	8,389,508	8,549,181
Investments carried under the equity method	54,777	53,419
Current financial investments	241,544	239,252
Cash and cash equivalents (project companies)	546,383	524,450
Total assets	9,232,212	9,366,302
Liabilities allocated [Abstract]
Long-term and short-term project debt	5,076,352	5,091,114
Grants and other liabilities	1,653,323	1,658,126
Total liabilities	6,729,675	6,749,240
Unallocated [Member]
Assets allocated [Abstract]
Other non-current assets	217,591	188,736
Other current assets (including cash and cash equivalents at holding company level)	370,040	363,993
Total assets	587,631	552,729
Liabilities allocated [Abstract]
Long-term and short-term corporate debt	697,545	684,073
Other non-current liabilities	560,833	523,827
Other current liabilities	166,787	205,779
Total liabilities	1,425,165	1,413,679
Equity	1,665,003	1,756,112
Total liabilities and equity	$ 3,090,168	$ 3,169,791

Financial information by segm_7

Financial information by segment, Assets and liabilities by business sector (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 2018	Dec. 31, 2017
Assets allocated [Abstract]
Contracted concessional assets	$ 8,389,508	$ 8,549,181
Investments carried under the equity method	54,777	53,419
Current financial investments	243,025	240,834
Cash and cash equivalents (project companies)	654,618	631,542	$ 755,902	$ 669,387
Total assets	9,819,843	9,919,031
Liabilities allocated [Abstract]
Long-term and short-term project debt	5,076,352	5,091,114
Grants and other liabilities	1,653,323	1,658,126
Long-term and short-term corporate debt	697,545	684,073
Total liabilities	8,154,840	8,162,919
Equity	1,665,003	1,756,112	$ 1,895,136	$ 1,884,967
Total liabilities and equity	9,819,843	9,919,031
Renewable Energy [Member]
Assets allocated [Abstract]
Contracted concessional assets	6,844,804	6,998,020
Investments carried under the equity method	10,114	10,257
Current financial investments	15,083	15,396
Cash and cash equivalents (project companies)	491,723	453,096
Total assets	7,361,724	7,476,769
Liabilities allocated [Abstract]
Long-term and short-term project debt	3,857,857	3,868,626
Grants and other liabilities	1,651,442	1,656,146
Total liabilities	5,509,299	5,524,772
Efficient Natural Gas [Member]
Assets allocated [Abstract]
Contracted concessional assets	581,808	580,997
Investments carried under the equity method	0	0
Current financial investments	140,237	147,192
Cash and cash equivalents (project companies)	28,612	45,625
Total assets	750,657	773,814
Liabilities allocated [Abstract]
Long-term and short-term project debt	540,695	545,123
Grants and other liabilities	151	161
Total liabilities	540,846	545,284
Electric Transmission Lines [Member]
Assets allocated [Abstract]
Contracted concessional assets	876,781	882,980
Investments carried under the equity method	0	0
Current financial investments	70,091	61,102
Cash and cash equivalents (project companies)	13,586	14,043
Total assets	960,458	958,125
Liabilities allocated [Abstract]
Long-term and short-term project debt	649,802	647,820
Grants and other liabilities	959	1,025
Total liabilities	650,761	648,845
Water [Member]
Assets allocated [Abstract]
Contracted concessional assets	86,115	87,184
Investments carried under the equity method	44,663	43,162
Current financial investments	16,133	15,562
Cash and cash equivalents (project companies)	12,462	11,686
Total assets	159,373	157,594
Liabilities allocated [Abstract]
Long-term and short-term project debt	27,998	29,545
Grants and other liabilities	771	794
Total liabilities	28,769	30,339
Allocated [Member]
Assets allocated [Abstract]
Contracted concessional assets	8,389,508	8,549,181
Investments carried under the equity method	54,777	53,419
Current financial investments	241,544	239,252
Cash and cash equivalents (project companies)	546,383	524,450
Total assets	9,232,212	9,366,302
Liabilities allocated [Abstract]
Long-term and short-term project debt	5,076,352	5,091,114
Grants and other liabilities	1,653,323	1,658,126
Total liabilities	6,729,675	6,749,240
Unallocated [Member]
Assets allocated [Abstract]
Other non-current assets	217,591	188,736
Other current assets (including cash and cash equivalents at holding company level)	370,040	363,993
Total assets	587,631	552,729
Liabilities allocated [Abstract]
Long-term and short-term corporate debt	697,545	684,073
Other non-current liabilities	560,833	523,827
Other current liabilities	166,787	205,779
Total liabilities	1,425,165	1,413,679
Equity	1,665,003	1,756,112
Total liabilities and equity	$ 3,090,168	$ 3,169,791

Financial information by segm_8

Financial information by segment, Depreciation, amortization and impairment charges recognized (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Financial information by segment [Abstract]
Depreciation, amortization, and impairment charges	$ (75,736)	$ (74,624)
North America [Member]
Financial information by segment [Abstract]
Depreciation, amortization, and impairment charges	(26,583)	(23,861)
South America [Member]
Financial information by segment [Abstract]
Depreciation, amortization, and impairment charges	(11,251)	(10,197)
EMEA [Member]
Financial information by segment [Abstract]
Depreciation, amortization, and impairment charges	(37,902)	(40,566)
Renewable Energy [Member]
Financial information by segment [Abstract]
Depreciation, amortization, and impairment charges	(72,139)	(67,554)
Electric Transmission Lines [Member]
Financial information by segment [Abstract]
Depreciation, amortization, and impairment charges	(6,134)	(7,070)
Efficient Natural Gas [Member]
Financial information by segment [Abstract]
Depreciation, amortization, and impairment charges	$ 2,537	$ 0

Changes in the scope of the c_3

Changes in the scope of the consolidated condensed interim financial statements (Details) $ in Thousands	Dec. 28, 2018USD ($)TransmissionLine	Oct. 10, 2018USD ($)	Mar. 31, 2019USD ($)	Dec. 31, 2018USD ($)	Dec. 13, 2018USD ($)	Dec. 11, 2018USD ($)	Feb. 28, 2018USD ($)
Changes in the scope of the consolidated financial statements [Abstract]
Change in the scope of the consolidated financial statements			$ 0
Business acquisition [Abstract]
Investments carried under the equity method			54,777	$ 53,419
Current assets			1,157,967	1,127,695
Project debt long term			(4,769,119)	(4,826,659)
Deferred tax liabilities			(227,261)	(211,000)
Project debt short term			$ (307,233)	(264,455)
Asset Acquisition [Member]
Changes in the scope of the consolidated financial statements [Abstract]
Purchase price				76,604
Business acquisition [Abstract]
Concessional assets				155,909
Investments carried under the equity method				1
Current assets				5,646
Project debt long term				(79,016)
Deferred tax liabilities				(590)
Project debt short term				(2,346)
Other current and non-current liabilities				(3,000)
Asset acquisition - purchase price				(76,604)
Net result of the asset acquisition				$ 0
Mini- Hydro [Member]
Changes in the scope of the consolidated financial statements [Abstract]
Percentage interest acquired							100.00%
Purchase price							$ 9,327
Business acquisition [Abstract]
Asset acquisition - purchase price							$ (9,327)
Pemex Transportation System [Member]
Changes in the scope of the consolidated financial statements [Abstract]
Percentage interest acquired		5.00%
Consideration initial amount will be disbursed as construction progresses		$ 7,000
Additional ownership percentage to be acquired		65.00%
Remaining ownership percentage to be acquired one year after COD		30.00%
Total estimated equity investment		$ 150,000
Chile TL3 [Member]
Changes in the scope of the consolidated financial statements [Abstract]
Purchase price						$ 6,000
Business acquisition [Abstract]
Asset acquisition - purchase price						$ (6,000)
Melowind [Member]
Changes in the scope of the consolidated financial statements [Abstract]
Percentage interest acquired					100.00%
Purchase price					$ 45,000
Business acquisition [Abstract]
Asset acquisition - purchase price					$ (45,000)
Power Substation [Member]
Changes in the scope of the consolidated financial statements [Abstract]
Purchase price	$ 16,000
Number of transmission lines acquired | TransmissionLine	2
Business acquisition [Abstract]
Asset acquisition - purchase price	$ (16,000)

Contracted concessional asset_2

Contracted concessional assets (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2019	Dec. 31, 2018
Contracted Concessional Assets [Abstract]
Contracted concessional assets	$ 8,389,508	$ 8,549,181
Impairment loss on contracted concessional financial assets	0
Contracted Concessional Assets [Member]
Contracted Concessional Assets [Abstract]
Contracted concessional financial assets	843,909	843,291
Solana [Member]
Contracted Concessional Assets [Abstract]
Impairment loss on contracted concessional financial assets		42,700
Cost [Member]
Contracted Concessional Assets [Abstract]
Contracted concessional assets	10,373,619	10,475,828
Amortization and Impairment [Member]
Contracted Concessional Assets [Abstract]
Contracted concessional assets	$ (1,984,111)	$ (1,926,647)

Investments carried under the_3

Investments carried under the equity method (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2019	Dec. 31, 2018
Investments in associates [Abstract]
Investment under the equity method		$ 54,777	$ 53,419
Geida Tlemcen, S.L. [Member]
Investments in associates [Abstract]
Ownership interest		50.00%
Evacuacion Valdecaballeros, S.L. [Member]
Investments in associates [Abstract]
Investment under the equity method		$ 8,652	8,773
Myah Bahr Honaine, S.P.A. [Member]
Investments in associates [Abstract]
Investment under the equity method	[1]	$ 44,663	43,161
Myah Bahr Honaine, S.P.A. [Member] | Geida Tlemcen, S.L. [Member]
Investments in associates [Abstract]
Ownership interest		51.00%
Pectonex, R.F. Proprietary Limited [Member]
Investments in associates [Abstract]
Investment under the equity method		$ 1,461	1,485
ABY Infraestructuras, S.L. [Member]
Investments in associates [Abstract]
Investment under the equity method		1	0
Ca Ku A1, S.A.P.I de CV (PTS) [Member]
Investments in associates [Abstract]
Investment under the equity method		0	0
Evacuacion Villanueva del Rey, S.L [Member]
Investments in associates [Abstract]
Investment under the equity method		0	0
Associate Companies [Member]
Investments in associates [Abstract]
Investment under the equity method		$ 54,777	$ 53,419
[1]	Myah Bahr Honaine, S.P.A., the project entity, is 51% owned by Geida Tlemcen, S.L. which is accounted for using the equity method in these consolidated condensed interim financial statements. Geida Tlemcen, S.L. is 50% owned by Atlantica.

Financial investments (Details)

Financial investments (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Financial investments [Abstract]
Fair Value through OCI (Investment in Ten West link)	$ 6,034	$ 6,034
Derivative assets	6,297	11,571
Other receivable accounts at amortized cost	53,055	35,065
Total non-current financial investments	65,386	52,670
Contracted concessional financial assets	152,230	159,128
Derivative assets	1,481	1,582
Other receivable accounts at amortized cost	89,314	80,124
Total current financial investments	$ 243,025	$ 240,834

Financial investments, Restruct

Financial investments, Restructuring agreement of Abengoa (Details) $ in Millions	3 Months Ended
	Mar. 31, 2019USD ($)mi	Jan. 29, 2019USD ($)
Befesa Agua Tenes, S.L.U. [Member]
Restructuring Agreement [Abstract]
Consideration payment advanced		$ 19.9
Ten West Link [Member]
Restructuring Agreement [Abstract]
Interest acquired	$ 12.5
Length of transmission lines | mi	114

Derivative financial instrume_3

Derivative financial instruments (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Breakdown of fair value amount of derivative financial instruments [Abstract]
Loss on cash flow hedges	$ 14,146	$ 17,335
Cash Flow Hedge [Member]
Breakdown of fair value amount of derivative financial instruments [Abstract]
Assets	7,778		$ 13,153
Liabilities	$ 305,138		279,152
Interest Rate Derivatives [Member] | Euros [Member]
Breakdown of fair value amount of derivative financial instruments [Abstract]
Percent of notional amount of debt hedged in next 12 months	100.00%
Percentage of notional amount of debt hedged in year two	75.00%
Interest Rate Derivatives [Member] | Cash Flow Hedge [Member]
Breakdown of fair value amount of derivative financial instruments [Abstract]
Assets	$ 3,879		9,932
Liabilities	305,138		279,152
Loss on cash flow hedges	(14,200)	$ (17,300)
After-tax result accumulated in equity	71,000		95,000
Foreign Exchange Derivative Instruments [Member] | Cash Flow Hedge [Member]
Breakdown of fair value amount of derivative financial instruments [Abstract]
Assets	3,899		3,230
Liabilities	$ 0		$ 0

Related parties (Details)

Related parties (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended		12 Months Ended
	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018	Nov. 27, 2018
Details of Balances [Abstract]
Total non-current payables with related parties		$ 28,434		$ 33,675
Transactions With Related Party [Abstract]
Financial income		286	$ 296
Financial expenses		$ (101,503)	(100,067)
Algonquin [Member]
Non-controlling ownership interest [Abstract]
Additional ownership interests acquired					16.47%
Ownership interest	25.00%	41.47%		41.47%
Related Parties [Member]
Details of Balances [Abstract]
Total current receivables with related parties		$ 4,044		$ 5,328
Total current payables with related parties		25,139		19,352
Total non-current payables with related parties		28,434		$ 33,675
Subsidiaries [Member]
Transactions With Related Party [Abstract]
Services received		0	(26,541)
Financial income		7	1,386
Financial expenses		$ (183)	$ (341)
Abengoa [Member]
Transactions With Related Party [Abstract]
Term to maintain guarantees and letters of credit		5 years
Guarantees amount		$ 3,000

Trade and other receivables (De

Trade and other receivables (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Trade and other receivables [Abstract]
Trade receivables	$ 177,841	$ 163,856
Tax receivables	35,062	54,959
Prepayments	19,342	5,521
Other accounts receivable	9,167	12,059
Total	$ 241,412	$ 236,395

Equity (Details)

Equity (Details) $ / shares in Units, $ in Thousands	Feb. 26, 2019$ / shares	Mar. 31, 2018	Mar. 31, 2019USD ($)Vote$ / sharesshares	Dec. 31, 2018USD ($)
Equity [Abstract]
Share capital | $			$ 10,022	$ 10,022
Shares outstanding (in shares)			100,217,260
Nominal value per share (in dollars per share) | $ / shares			$ 0.10
Voting right per share | Vote			1
Treasury shares held (in shares)			0
Increase (decrease) in treasury shares (in shares)			0
Fourth Quarter [Member]
Equity [Abstract]
Dividend declared and paid (in dollars per share) | $ / shares	$ 0.37
Algonquin [Member]
Equity [Abstract]
Ownership interest		25.00%	41.47%	41.47%

Corporate debt, Breakdown of co

Corporate debt, Breakdown of corporate debt (Details) $ in Thousands, € in Millions	Feb. 10, 2017EUR (€)Swap	Mar. 31, 2019USD ($)	Dec. 31, 2018USD ($)
Corporate debt [Abstract]
Non-current		$ 423,921	$ 415,168
Current		273,624	268,905
Total Corporate Debt		697,545	$ 684,073
Note Issuance Facility [Member]
Corporate debt [Abstract]
Total Corporate Debt		$ 301,582
Principal amount | €	€ 275
Number of interest rate swaps | Swap	2
Fixed interest rate	5.50%
Note Issuance Facility [Member] | EURIBOR [Member]
Corporate debt [Abstract]
Adjustment to interest rate	4.90%
Series 1 Notes [Member]
Corporate debt [Abstract]
Maturity date		2022
Series 2 Notes [Member]
Corporate debt [Abstract]
Maturity date		2023
Series 3 Notes [Member]
Corporate debt [Abstract]
Maturity date		2024

Corporate debt, Repayment sched

Corporate debt, Repayment schedule (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Repayment schedule [Abstract]
Corporate debt	$ 697,545	$ 684,073
Remainder of 2019 [Member]
Repayment schedule [Abstract]
Corporate debt	273,624
Between January and March 2020 [Member]
Repayment schedule [Abstract]
Corporate debt	0
2021 [Member]
Repayment schedule [Abstract]
Corporate debt	122,761
2022 [Member]
Repayment schedule [Abstract]
Corporate debt	100,902
2023 [Member]
Repayment schedule [Abstract]
Corporate debt	100,166
Subsequent Years [Member]
Repayment schedule [Abstract]
Corporate debt	100,092
New Revolving Credit Facility [Member]
Repayment schedule [Abstract]
Corporate debt	122,761
New Revolving Credit Facility [Member] | Remainder of 2019 [Member]
Repayment schedule [Abstract]
Corporate debt	0
New Revolving Credit Facility [Member] | Between January and March 2020 [Member]
Repayment schedule [Abstract]
Corporate debt	0
New Revolving Credit Facility [Member] | 2021 [Member]
Repayment schedule [Abstract]
Corporate debt	122,761
New Revolving Credit Facility [Member] | 2022 [Member]
Repayment schedule [Abstract]
Corporate debt	0
New Revolving Credit Facility [Member] | 2023 [Member]
Repayment schedule [Abstract]
Corporate debt	0
New Revolving Credit Facility [Member] | Subsequent Years [Member]
Repayment schedule [Abstract]
Corporate debt	0
Note Issuance Facility [Member]
Repayment schedule [Abstract]
Corporate debt	301,582
Note Issuance Facility [Member] | Remainder of 2019 [Member]
Repayment schedule [Abstract]
Corporate debt	422
Note Issuance Facility [Member] | Between January and March 2020 [Member]
Repayment schedule [Abstract]
Corporate debt	0
Note Issuance Facility [Member] | 2021 [Member]
Repayment schedule [Abstract]
Corporate debt	0
Note Issuance Facility [Member] | 2022 [Member]
Repayment schedule [Abstract]
Corporate debt	100,902
Note Issuance Facility [Member] | 2023 [Member]
Repayment schedule [Abstract]
Corporate debt	100,166
Note Issuance Facility [Member] | Subsequent Years [Member]
Repayment schedule [Abstract]
Corporate debt	100,092
2017 Credit Facility [Member]
Repayment schedule [Abstract]
Corporate debt	11,203
2017 Credit Facility [Member] | Remainder of 2019 [Member]
Repayment schedule [Abstract]
Corporate debt	11,203
2017 Credit Facility [Member] | Between January and March 2020 [Member]
Repayment schedule [Abstract]
Corporate debt	0
2017 Credit Facility [Member] | 2021 [Member]
Repayment schedule [Abstract]
Corporate debt	0
2017 Credit Facility [Member] | 2022 [Member]
Repayment schedule [Abstract]
Corporate debt	0
2017 Credit Facility [Member] | 2023 [Member]
Repayment schedule [Abstract]
Corporate debt	0
2017 Credit Facility [Member] | Subsequent Years [Member]
Repayment schedule [Abstract]
Corporate debt	0
2019 Notes [Member]
Repayment schedule [Abstract]
Corporate debt	261,999
2019 Notes [Member] | Remainder of 2019 [Member]
Repayment schedule [Abstract]
Corporate debt	261,999
2019 Notes [Member] | Between January and March 2020 [Member]
Repayment schedule [Abstract]
Corporate debt	0
2019 Notes [Member] | 2021 [Member]
Repayment schedule [Abstract]
Corporate debt	0
2019 Notes [Member] | 2022 [Member]
Repayment schedule [Abstract]
Corporate debt	0
2019 Notes [Member] | 2023 [Member]
Repayment schedule [Abstract]
Corporate debt	0
2019 Notes [Member] | Subsequent Years [Member]
Repayment schedule [Abstract]
Corporate debt	$ 0

Corporate debt, Details of corp

Corporate debt, Details of corporate debt (Details) $ in Thousands, € in Millions	3 Months Ended
	Mar. 31, 2019USD ($)	Mar. 31, 2018USD ($)	Jan. 31, 2019USD ($)	May 10, 2018USD ($)	Jul. 20, 2017USD ($)	Jul. 20, 2017EUR (€)	Nov. 17, 2014USD ($)
Corporate debt [Abstract]
Amount drawn	$ 15,000	$ 0
2019 Notes [Member]
Corporate debt [Abstract]
Senior notes issued							$ 255,000
Fixed interest rate							7.00%
Maturity date	November 15, 2019
Eurodollar Rate Loans [Member] | LIBOR [Member] | Top of range [member]
Corporate debt [Abstract]
Adjustment to interest rate				2.25%
Eurodollar Rate Loans [Member] | LIBOR [Member] | Bottom of range [member]
Corporate debt [Abstract]
Adjustment to interest rate				1.60%
Base Rate Loans [Member] | Top of range [member]
Corporate debt [Abstract]
Adjustment to interest rate				1.00%
Base Rate Loans [Member] | Bottom of range [member]
Corporate debt [Abstract]
Adjustment to interest rate				0.60%
Base Rate Loans [Member] | Federal Funds Rate [Member]
Corporate debt [Abstract]
Adjustment to interest rate				0.50%
Base Rate Loans [Member] | LIBOR [Member]
Corporate debt [Abstract]
Adjustment to interest rate				1.00%
2017 Credit Facility [Member]
Corporate debt [Abstract]
Maturity date	July 20, 2019
2017 Credit Facility [Member] | Top of range [member]
Corporate debt [Abstract]
Credit facility amount					$ 11,200	€ 10
2017 Credit Facility [Member] | EURIBOR [Member]
Corporate debt [Abstract]
Adjustment to interest rate					2.25%	2.25%
2017 Credit Facility [Member] | LIBOR [Member]
Corporate debt [Abstract]
Adjustment to interest rate					2.25%	2.25%
New Revolving Credit Facility [Member]
Corporate debt [Abstract]
Maturity date	December 31, 2021
Credit facility amount	$ 70,000		$ 300,000	$ 215,000
Amount drawn	$ 123,000

Project debt, Details of projec

Project debt, Details of project debt (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Project debt [Abstract]
Cash held to satisfy non-recourse debt agreements	$ 259,000
Non-current	4,769,119	$ 4,826,659
Current	307,233	264,455
Total Project debt	$ 5,076,352	$ 5,091,114

Project debt, Repayment schedul

Project debt, Repayment schedule (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Repayment schedule [Abstract]
Project debt	$ 5,076,352	$ 5,091,114
Remainder of 2019 [Member]
Repayment schedule [Abstract]
Payment of interests accrued	64,135
Nominal repayment	226,100
Between January and March 2020 [Member]
Repayment schedule [Abstract]
Project debt	16,998
Between April and December 2020 [Member]
Repayment schedule [Abstract]
Project debt	236,207
2021 [Member]
Repayment schedule [Abstract]
Project debt	265,416
2022 [Member]
Repayment schedule [Abstract]
Project debt	296,067
2023 [Member]
Repayment schedule [Abstract]
Project debt	321,564
Subsequent Years [Member]
Repayment schedule [Abstract]
Project debt	$ 3,649,865

Grants and other liabilities (D

Grants and other liabilities (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2019USD ($)Type	Mar. 31, 2018USD ($)	Dec. 31, 2018USD ($)	Oct. 02, 2013USD ($)
Grants and other liabilities [Abstract]
Grants	$ 1,134,944		$ 1,150,805
Other Liabilities	518,379		507,321
Grant and other non-current liabilities	$ 1,653,323		1,658,126
Number of grant types | Type	2
Income from grants	$ 14,789	$ 14,857
Solana and Mojave [Member]
Grants and other liabilities [Abstract]
Income from grants	14,800	$ 14,900
U.S. Department of Treasury [Member]
Grants and other liabilities [Abstract]
Grants	731,000		739,000
Federal Financing Bank [Member]
Grants and other liabilities [Abstract]
Grants	402,000		410,000
Liberty Interactive Corporation [Member]
Grants and other liabilities [Abstract]
Grant and other non-current liabilities	364,000		358,000
Class A membership investment				$ 300,000
Finance lease liabilities	$ 56,000		$ 57,000
Liberty Interactive Corporation [Member] | Solana and Mojave [Member]
Grants and other liabilities [Abstract]
Percentage of dividends and taxable loss received	61.20%
Percentage of entity's revenue received once conditions are met	22.60%

Trade payables and other curr_3

Trade payables and other current liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Trade payables and other current liabilities [Abstract]
Trade accounts payable	$ 71,367	$ 109,430
Down payments from clients	6,249	6,289
Liberty (see Note 16)	37,119	37,119
Other accounts payable	36,728	39,195
Total	$ 151,463	$ 192,033

Income Tax (Details)

Income Tax (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Income Tax [Abstract]
Income tax expense	$ 9,577	$ 4,650
Profit before income tax	$ 5,887	$ 3,140

Financial income and expenses_2

Financial income and expenses (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Financial income [Abstract]
Interest income from loans and credits	$ 173	$ 119
Interest rates benefits derivatives: cash flow hedges	113	177
Total	286	296
Financial expenses [Abstract]
Expenses due to interest - Loans from credit entities	(63,233)	(63,751)
Expenses due to interest - Other debts	(23,822)	(18,468)
Interest rates losses derivatives: cash flow hedges	(14,448)	(17,848)
Total	(101,503)	(100,067)
Other financial income / (expenses) [Abstract]
Other financial income	5,633	2,171
Other financial losses	(4,571)	(3,831)
Total	$ 1,062	$ (1,660)

Other operating income and ex_3

Other operating income and expenses (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Other operating income [Abstract]
Grants	$ 14,789	$ 14,857
Income from various services and insurance proceeds	11,650	13,557
Total	26,439	28,414
Other operating expenses [Abstract]
Leases and fees	(731)	(743)
Operation and maintenance	(33,817)	(32,444)
Independent professional services	(8,833)	(7,091)
Supplies	(6,865)	(7,391)
Insurance	(6,112)	(6,443)
Levies and duties	(3,069)	(9,909)
Other expenses	(1,146)	(2,173)
Total	$ (60,573)	$ (66,194)

Earnings per share (Details)

Earnings per share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Earnings per share [Abstract]
Profit/(loss) from continuing operations attributable to Atlantica Yield Plc.	$ (8,957)	$ (4,764)
Average number of ordinary shares outstanding (thousands) - basic and diluted (in shares)	100,217	100,217
Earnings per share from continuing operations - basic and diluted (in dollars per share)	$ (0.09)	$ (0.05)
Earnings per share from profit/ (loss) for the period - basic and diluted (in dollars per share)	$ (0.09)	$ (0.05)

Subsequent events (Details)

Subsequent events (Details) - Subsequent Events [Member] $ / shares in Units, $ in Millions	May 07, 2019$ / shares	Apr. 30, 2019USD ($)MWCorporation
Dividends approved [Abstract]
Dividend approved (in dollars per share) | $ / shares	$ 0.39
Dividend approved expected date to be paid	Jun. 14, 2019
Monterrey [Member]
Business acquisition [Abstract]
Ownership percentage acquired		30.00%
Power capacity		142
Installed capacity		130
Battery capacity		12
Period of PPA		20 years
Number of international corporations | Corporation		2
Total estimated equity investment | $		$ 42
Ownership percentage to be acquired under ROFO agreement		70.00%
2019 Note Issuance Facility [Member]
Unsecured Note Facility [Abstract]
Senior unsecured note facility | $		$ 300
Maturity date		April 30, 2025
Upfront fee percentage		2.00%
Interest rate swap interest rate basis		4.50%
Interest capitalization period		2 years
2019 Note Issuance Facility [Member] | Bottom of range [member]
Unsecured Note Facility [Abstract]
Interest rate swap period		3 years
2019 Note Issuance Facility [Member] | EURIBOR [Member]
Unsecured Note Facility [Abstract]
Variable interest period		3 months
Variable interest rate		4.65%