CPFL Energy (CPL) 20-F/A 23 May 18 2017 FY Annual report (foreign) (amended) Financial data

Document and Entity Information

Document and Entity Information	12 Months Ended
	Dec. 31, 2017shares
Document And Entity Information
Entity Registrant Name	CPFL Energy INC
Entity Central Index Key	1,300,482
Document Type	20-F
Trading Symbol	CPL
Document Period End Date	Dec. 31, 2017
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Entity a Well-known Seasoned Issuer	Yes
Entity a Voluntary Filer	No
Entity's Reporting Status Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding	1,017,914,746
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2,017

CONSOLIDATED STATEMENTS OF FINA

CONSOLIDATED STATEMENTS OF FINANCIAL POSITION - BRL (R$) R$ in Thousands	Dec. 31, 2017	Dec. 31, 2016
CURRENT ASSETS
Cash and cash equivalents	R$ 3249642	R$ 6164997
Consumers, concessionaires and licensees	4,301,283	3,765,893
Dividend and interest on capital	56,145	73,328
Income tax and social contribution recoverable	88,802	143,943
Taxes recoverable	306,244	259,905
Derivatives	444,029	163,241
Sector financial asset	210,834	0
Concession financial asset	23,736	10,700
Other receivables	900,498	797,181
TOTAL CURRENT ASSETS	9,581,212	11,379,187
NONCURRENT ASSETS
Consumers, concessionaires and licensees	236,539	203,185
Associates, subsidiaries and parent company	8,612	47,631
Escrow deposits	839,990	550,072
Income tax and social contribution recoverable	61,464	65,535
Taxes recoverable	171,980	132,751
Sector financial assets	355,003	0
Derivatives	203,901	641,357
Deferred tax assets	943,199	922,858
Concession financial asset	6,545,668	5,363,144
Investments at cost	116,654	116,654
Other receivables	840,192	766,253
Investments	1,001,550	1,493,753
Property, plant and equipment	9,787,125	9,712,998
Intangible assets	10,589,824	10,775,613
TOTAL NONCURRENT ASSETS	31,701,701	30,791,805
TOTAL ASSETS	41,282,912	42,170,992
CURRENT LIABILITIES
Trade payables	3,296,870	2,728,130
Borrowings	3,589,607	1,875,648
Debentures	1,703,073	1,547,275
Private pension plan	60,801	33,209
Regulatory charges	581,600	366,078
Income tax and social contribution payable	81,457	57,227
Taxes, fees and contributions	628,846	624,317
Dividend	297,744	232,851
Estimated payroll	116,080	131,707
Derivatives	10,230	6,055
Sector financial liability	40,111	597,515
Use of public asset	10,965	10,857
Other payables	961,306	807,623
TOTAL CURRENT LIABILITIES	11,378,688	9,018,492
NONCURRENT LIABILITIES
Trade payables	128,438	129,781
Borrowings	7,402,450	11,168,394
Debentures	7,473,454	7,452,672
Private pension plan	880,360	1,019,233
Taxes, fees and contributions	18,839	26,814
Deferred tax liabilities	1,249,591	1,324,134
Provision for tax, civil and labor risks	961,134	833,276
Derivatives	84,576	112,207
Sector financial liability	8,385	317,406
Use of public asset	83,766	86,624
Other payables	426,890	309,292
TOTAL NONCURRENT LIABILITIES	18,717,881	22,779,832
EQUITY
Issued capital	5,741,284	5,741,284
Capital reserves	468,014	468,014
Legal reserve	798,090	739,102
Statutory reserve - concession financial asset	826,600	702,928
Statutory reserve - working capital improvement	1,292,046	545,505
Additional dividend proposed	0	7,820
Accumulated other comprehensive income	(164,506)	(234,633)
Total shareholders' equity attributable to owners of the Company	8,961,528	7,970,021
Equity attributable to noncontrolling interests	2,224,816	2,402,648
TOTAL EQUITY	11,186,344	10,372,668
TOTAL LIABILITIES AND EQUITY	R$ 41282912	R$ 42170992

CONSOLIDATED STATEMENTS OF INCO

CONSOLIDATED STATEMENTS OF INCOME - BRL (R$) R$ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Profit or loss [abstract]
NET OPERATING REVENUE	R$ 26744905	R$ 19112089	R$ 20599212
COST OF ELECTRIC ENERGY SERVICES
Cost of electric energy	(16,901,518)	(11,200,242)	(13,311,747)
Cost of operation	(2,771,145)	(2,248,795)	(1,907,107)
Cost of services rendered to third parties	(2,074,611)	(1,357,032)	(1,049,101)
GROSS PROFIT	4,997,632	4,306,020	4,331,167
Operating expenses
Sales expenses	(590,232)	(547,251)	(464,583)
General and administrative expenses	(947,072)	(849,416)	(863,499)
Other Operating Expense	(438,494)	(386,746)	(357,653)
INCOME FROM ELECTRIC ENERGY SERVICES	3,021,834	2,522,608	2,645,434
Equity interests in associates and joint ventures	312,390	311,414	216,885
FINANCE INCOME (EXPENSES)
Finance income	880,314	1,200,503	1,143,247
Finance expenses	(2,367,868)	(2,653,978)	(2,551,110)
Finance income (expenses)	(1,487,554)	(1,453,474)	(1,407,863)
PROFIT BEFORE TAXES	1,846,670	1,380,547	1,454,454
Social contribution	(168,728)	(150,859)	(160,162)
Income tax	(434,901)	(350,631)	(419,015)
Total income tax and social contributions	(603,629)	(501,490)	(579,177)
PROFIT FOR THE YEAR	1,243,042	879,057	875,277
Profit attributable to the owners of the Company	1,179,750	900,885	864,940
Profit (loss) attributable to noncontrolling interests	R$ 63292	R$ 21828	R$ 10337
Earnings per share attributable to owners of the Company:
Basic	R$ 1.16	R$ 0.89	R$ 0.85
Diluted	R$ 1.15	R$ 0.87	R$ 0.83

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - BRL (R$) R$ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Profit or loss [abstract]
Profit for the year	R$ 1243042	R$ 879057	R$ 875277
Other comprehensive income
Items that will not be reclassified subsequently to profit and loss - Actuarial gains (losses), net of tax effects	96,000	(394,175)	65,547
Total Comprehensive income for the year	1,339,042	484,882	940,825
Attributable to owners of the Company	1,275,750	506,709	930,488
Attributable to noncontrolling interests	R$ 63292	R$ 21828	R$ 10337

CONSOLIDATED STATEMENTS OF CHAN

CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY - BRL (R$) R$ in Thousands	Issued capital	Capital reserves	Earning reserves / Legal reserve	Concession financial asset	Earning reserves / Statutory reserves / Working capital improvement	Earning reserves / Dividends	Accumulated comprehensive income / Deemed cost	Accumulated comprehensive income / Private pension plan	Retained earnings	Total	Noncontrolling interests / Accumulated comprehensive income	Noncontrolling interests / Other equity component	Total
Balance at beginning at Dec. 31, 2014	R$ 4793424	R$ 468082	R$ 650811	R$ 330437	R$ 554888	R$ 0	R$ 483610	R$ 337718	R$ 0	R$ 6943535	R$ 17003	R$ 2436791	R$ 9397329
Total comprehensive income
Profit for the year									864,940	864,940		10,337	875,277
Other comprehensive income - actuarial gains								65,547		65,547			65,547
Internal changes of shareholders'equity
Realization of deemed cost of property, plant and equipment							(39,574)		39,574	0	(2,550)	2,550	0
Tax on realization of deemed cost							13,455		(13,455)	0	867	(867)	0
Recognition of legal reserve			43,247						(43,247)	0			0
Changes in statutory reserve in the year				255,013	392,972				(647,985)	0			0
Other changes in noncontrolling interests										0		(48)	(48)
Capital transactions with owners
Capital increase (reduction)	554,888				(554,888)					0			0
Prescribed dividends									5,597	5,597			5,597
Additional dividend aproved									(205,423)	(205,423)		(8,147)	(213,570)
Capital increase in subsidiaries with no change in control										0		7	7
Balance at ending at Dec. 31, 2015	5,348,312	468,082	694,058	585,450	392,972	0	457,491	(272,170)	0	7,674,196	15,320	2,440,623	10,130,140
Total comprehensive income
Profit for the year									900,885	900,885		(21,828)	879,057
Other comprehensive income - actuarial gains								(394,175)		(394,175)			(394,175)
Internal changes of shareholders'equity
Realization of deemed cost of property, plant and equipment							(39,058)		39,058	0	(2,649)	2,649	0
Tax on realization of deemed cost							13,280		(13,280)	0	901	(901)	0
Recognition of legal reserve			45,044						(45,044)	0			0
Changes in statutory reserve in the year				117,478	545,505				(662,983)	0			0
Other changes in noncontrolling interests										0		(1,176)	(1,176)
Capital transactions with owners
Capital increase (reduction)	392,972				(392,972)					0			0
Prescribed dividends									3,144	3,144			3,144
Additional dividend proposed						7,820			(7,820)	0			(7,820)
Dividend distributed to noncontrolling interests										0		(30,827)	(30,827)
Dividend proposal approved									(213,960)	(213,960)			(213,960)
Capital increase in subsidiaries with no change in control		(68)								(68)		535	467
Balance at ending at Dec. 31, 2016	5,741,284	468,014	739,102	702,928	545,505	7,820	431,713	(666,346)	0	7,970,021	13,572	2,389,076	10,372,668
Total comprehensive income
Profit for the year									1,179,750	1,179,750		63,292	1,243,042
Other comprehensive income - actuarial gains								96,000		96,000			96,000
Internal changes of shareholders'equity
Realization of deemed cost of property, plant and equipment							(39,202)		39,202	0	(2,634)	2,634	0
Tax on realization of deemed cost							13,329		(13,329)	0	896	(896)	0
Recognition of legal reserve			58,988						(58,988)	0			0
Changes in statutory reserve in the year				123,673	746,541				(870,213)	0			0
Other changes in noncontrolling interests										0		(113)	(113)
Capital transactions with owners
Capital increase (reduction)										0		(122,791)	(122,791)
Prescribed dividends									3,768	3,768			3,768
Interim dividend										0		(7,226)	(7,226)
Dividend proposal approved						(7,820)			(280,191)	(288,011)		(110,993)	(399,005)
Balance at ending at Dec. 31, 2017	R$ 5741284	R$ 468014	R$ 798090	R$ 826600	R$ 1292046	R$ 0	R$ 405840	R$ 570346	R$ 0	R$ 8961528	R$ 11833	R$ 2212983	R$ 11186344

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS - BRL (R$) R$ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
OPERATING CASH FLOW
Profit before taxes	R$ 1846670	R$ 1380547	R$ 1454454
ADJUSTMENT TO RECONCILE PROFIT TO CASH FROM OPERATING ACTIVITIES
Depreciation and amortization	1,529,052	1,291,165	1,279,902
Provision for tax, civil and labor risks	176,609	228,292	258,539
Allowance for doubtful accounts	155,097	176,349	126,879
Interest on debts, inflation adjustment and exchange rate changes	1,863,311	2,052,959	1,519,819
Pension plan expense	113,898	76,638	60,184
Equity interests in associates and joint ventures	(312,390)	(311,414)	(216,885)
Impairment	20,437	48,291	38,956
Loss on disposal of noncurrent assets	132,195	83,576	16,309
Deferred taxes (PIS and COFINS)	963	(8,579)	19,138
Others	(19,074)	(1,832)	(5,825)
Adjustments to reconcile profit (loss)	5,506,768	5,015,992	4,551,470
DECREASE (INCREASE) IN OPERATING ASSETS
Consumers, concessionaires and licensees	(722,406)	(205,828)	(1,055,143)
Dividends and interest on capital received	730,178	83,356	24,050
Taxes recoverable	68,184	128,453	(62,041)
Escrow deposits	(248,128)	756,171	22,827
Sectorial financial asset	(425,004)	2,494,223	(858,860)
Receivables - amounts from the Energy Development Account - CDE / CCEE	(29,354)	186,052	181,141
Concession financial assets (transmission companies)	(56,665)	(55,134)	(44,243)
Other operating assets	91,607	265,404	(82,278)
INCREASE (DECREASE) IN OPERATING LIABILITIES
Trade payables	565,945	(782,963)	787,063
Other taxes and social contributions	(261,194)	(63,986)	412,703
Other liabilities with private pension plan	(79,724)	(77,183)	(112,172)
Regulatory charges	215,522	(514,935)	808,223
Tax, civil and labor risks paid	(206,788)	(216,998)	(247,512)
Sectorial financial liability	(1,089,592)	288,144	(23,170)
Payables - amounts provided by the CDE	17,544	(70,907)	19,696
Other operating liabilities	141,759	(148,967)	107,930
CASH FLOWS PROVIDED BY OPERATIONS	4,218,652	7,080,894	4,429,684
Interest paid on debts and debentures	(1,846,453)	(1,570,985)	(1,595,649)
Income tax and social contribution paid	(338,175)	(875,883)	(276,061)
NET CASH FROM OPERATING ACTIVITIES	2,034,024	4,634,026	2,557,974
INVESTING ACTIVITIES
Price paid in business combination net of cash acquired	0	(1,496,675)	0
Capital increase in existing investees	91,599	0	0
Gain on sales of interest in joint ventures	0	0	10,454
Purchases of property, plant and equipment	(685,856)	(1,026,867)	(550,003)
Securities, pledges and restricted deposits	(93,933)	(125,517)	(147,914)
Purchases of intangible assets	(1,884,577)	(1,211,082)	(877,793)
Sale of noncurrent assets	26,807	0	10,586
Intragroup loans	36,639	44,922	29,776
NET CASH USED IN INVESTING ACTIVITIES	(2,509,321)	(3,815,219)	(1,524,894)
FINANCING ACTIVITIES
Capital increase by noncontrolling interests	(122,791)	467	7
Borrowings and debentures raised	3,398,084	3,774,355	4,532,167
Repayment of principal of borrowings and debentures	(5,273,261)	(4,016,693)	(4,037,685)
Repayment of derivatives	(102,641)	158,242	(135,309)
Dividends and interest on capital paid	(336,934)	(231,749)	(5,204)
Repayment for business combinations	(2,514)	(21,234)	(61,709)
NET CASH GENERATED BY (USED IN) FINANCING ACTIVITIES	(2,440,057)	(336,612)	292,267
NET INCREASE IN CASH AND CASH EQUIVALENTS	(2,915,354)	482,195	1,325,347
CASH AND CASH EQUIVALENTS AT THE BEGINNING OF THE YEAR	6,164,997	5,682,802	4,357,455
CASH AND CASH EQUIVALENTS AT THE END OF THE YEAR	R$ 3249642	R$ 6164997	R$ 5682802

(1) OPERATIONS

(1) OPERATIONS	12 Months Ended
	Dec. 31, 2017
Operations
OPERATIONS	CPFL Energia S.A. (“CPFL Energia” or “Company”) is a publicly-held corporation incorporated for the principal purpose of operating as a holding company, with equity interests in other companies primarily engaged in electric energy distribution, generation and commercialization activities in Brazil. The Company’s registered office is located at Rodovia Eng o The Company has direct and indirect interests in the following subsidiaries and joint ventures (information on the concession area, member of consumers, energy production capacity and related data are not audited by the independent auditors): Energy distribution Company type Equity interest Location (state) Number of municipalities Approximate number of consumers (in thousands) Concession period End of the concession Companhia Paulista de Força e Luz ("CPFL Paulista") Publicly-held corporation Direct Interior of 234 4,389 30 years November 2027 Companhia Piratininga de Força e Luz ("CPFL Piratininga") Publicly-held corporation Direct Interior of 27 1,720 30 years October 2028 Rio Grande Energia S.A. ("RGE") Publicly-held corporation Direct Interior of 255 1,485 30 years November 2027 RGE Sul Distribuidora de Energia S.A. ("RGE Sul") Publicly-held corporation Indirect Interior of 118 1,336 30 years November 2027 Companhia Jaguari de Energia ("CPFL Santa Cruz") (e) Privately-held corporation Direct Interior of São Paulo, Paraná and Minas Gerais 45 447 30 years July 2045 Installed power (MW) Energy generation Company type Equity interest Location (state) Number of plants / type of energy Total CPFL share CPFL Geração de Energia S.A. ("CPFL Geração") Publicly-held corporation Direct São Paulo and Goiás 3 Hydropower plants (a) 1,295 678 CERAN - Companhia Energética Rio das Antas ("CERAN") Privately-held corporation Indirect Rio Grande do Sul 3 Hydropower plants 360 234 Foz do Chapecó Energia S.A. ("Foz do Chapecó") Privately-held corporation Indirect Santa Catarina and 1 Hydropower plant 855 436 Campos Novos Energia S.A. ("ENERCAN") Privately-held corporation Indirect Santa Catarina 1 Hydropower plant 880 429 BAESA - Energética Barra Grande S.A. ("BAESA") Privately-held corporation Indirect Santa Catarina and 1 Hydropower plant 690 173 Centrais Elétricas da Paraíba S.A. ("EPASA") Privately-held corporation Indirect Paraíba 2 Thermal plants 342 182 Paulista Lajeado Energia S.A. ("Paulista Lajeado") Privately-held corporation Indirect Tocantins 1 Hydropower plant 903 63 CPFL Energias Renováveis S.A. ("CPFL Renováveis") Publicly-held corporation Indirect (c) (c) (c) (c) CPFL Centrais Geradoras Ltda. ("CPFL Centrais Geradoras") Limited liability company Direct São Paulo and Minas Gerais 6 small hydropower plants 4 4 Energy commercialization Company type Core activity Equity interest CPFL Comercialização Brasil S.A. ("CPFL Brasil") Privately-held corporation Energy commercialization Direct Clion Assessoria e Comercialização de Energia Elétrica Ltda. Limited liability company Commercialization and provision of energy services Indirect CPFL Comercialização Cone Sul S.A. ("CPFL Cone Sul") Privately-held corporation Energy commercialization Indirect CPFL Planalto Ltda. ("CPFL Planalto") Limited liability company Energy commercialization Direct CPFL Brasil Varejista S.A. ("CPFL Brasil Varejista") Privately-held corporation Energy commercialization Indirect Provision of services Company type Core activity Equity interest CPFL Serviços, Equipamentos, Industria e Comércio S.A. Privately-held corporation Manufacturing, commercialization, rental and maintenance of electro-mechanical equipment and service provision Direct NECT Serviços Administrativos Ltda ("Nect") Limited liability company Provision of administrative services Direct CPFL Atende Centro de Contatos e Atendimento Ltda. ("CPFL Atende") Limited liability company Provision of call center services Direct CPFL Total Serviços Administrativos Ltda. ("CPFL Total") Limited liability company Collection services Direct CPFL Eficiência Energética S.A ("CPFL Eficiência") Privately-held corporation Energy efficiency management Direct TI Nect Serviços de Informática Ltda. ("Authi") Limited liability company Provision of IT services Direct CPFL GD S.A ("CPFL GD") Privately-held corporation Provision of maintenance services for energy generation companies Indirect Others Company type Core activity Equity interest CPFL Jaguari de Geração de Energia Ltda ("Jaguari Geração") Limited liability company Holding company Direct Chapecoense Geração S.A. ("Chapecoense") Privately-held corporation Holding company Indirect Sul Geradora Participações S.A. ("Sul Geradora") Privately-held corporation Holding company Indirect CPFL Telecom S.A ("CPFL Telecom") Privately-held corporation Telecommunication services Direct CPFL Transmissão Piracicaba S.A ("CPFL Transmissão Piracicaba") Privately-held corporation Energy transmission services Indirect CPFL Transmissora Morro Agudo S.A ("CPFL Transmissão Morro Agudo") Privately-held corporation Energy transmission services Indirect a) CPFL Geração has 51.54% of assured energy and power of the Serra da Mesa hydropower plant, whose concession is controlled by Furnas. The small hydropower plant Cariobinha and the thermoelectric plant Carioba are inactive while they await the position of the Ministry of Mines and Energy on the early termination of their concession and are not included in the table. b) Paulista Lajeado has a 7% share in the installed power of Investco S.A. (5.94% interest in total capital). c) CPFL Renováveis has operations in the states of São Paulo, Minas Gerais, Mato Grosso, Santa Catarina, Ceará, Rio Grande do Norte, Paraná and Rio Grande do Sul and its main activities are: (i) holding investments in companies of the renewable energy segment; (ii) identification, development, and exploration of generation potentials; and (iii) sale of electric energy. At December 31, 2017, CPFL Renováveis had a portfolio of 112 projects with installed capacity of 2,508.4 MW (2,102.6 MW in operation), as follows: · Hydropower generation: 46 SHP’s (543.2 MW) with 39 SHPs (small hydroelectric power plants) in operation (423 MW) and 7 SHPs under development (120.2 MW); · Wind power generation: 57 projects (1,594.1 MW) with 45 projects in operation (1,308.5 MW) and 12 projects under construction/development (285.6 MW); · Biomass power generation: 8 plants in operation (370 MW); · Solar power generation: 1 solar plant in operation (1.1 MW). d) The joint venture Chapecoense has as its direct subsidiary Foz do Chapecó and fully consolidates its financial statements. e) As described in note 14.4.2, on December 31, 2017, approval was given for the merger of the subsidiaries Companhia Luz e Força Santa Cruz, Companhia Leste Paulista de Energia, Companhia Jaguari de Energia, Companhia Sul Paulista de Energia and Companhia Luz e Força de Mococa into Companhia Jaguari de Energia, which adopted the trade name “CPFL Santa Cruz”. Negative net working capital (calculated by the excess of current liabilities over current assets) As at December 31, 2017, the Company had net working capital (calculated by the excess of current liabilities over current assets) of R$ 1,797,477. In January 2018, the subsidiaries issued debentures in the amount of R$ 2,610,000 (note 36). The Company has history of profitable operations and ready access to financial resources therefore the financial statements have been prepared using the going concern basis.

(2) PRESENTATION OF THE CONSOLI

(2) PRESENTATION OF THE CONSOLIDATED FINANCIAL STATEMENTS	12 Months Ended
	Dec. 31, 2017
Presentation Of Consolidated Financial Statements
PRESENTATION OF THE CONSOLIDATED FINANCIAL STATEMENTS	2.1 Basis of presentation The financial statements have been prepared in accordance with International Financial Reporting Standards - IFRS, issued by the International Accounting Standard Board – IASB. Management states that all information material to the financial statements is being disclosed and corresponds to what is used in managing the Group. The consolidated financial statements were approved by Management and authorized for issue on April 23, 2018 . 2.2 Basis of measurement The consolidated financial statements have been prepared on the historical cost basis except for the following items recorded in the statements of financial position: (i) derivative financial instruments measured at fair value, (ii) financial instruments measured at fair value through profit or loss, and (iii) available-for-sale financial assets measured at fair value. The classification of the fair value measurement in the level 1, 2 or 3 categories (depending on the degree of observance of the inputs used) is presented in note 33 – Financial Instruments. 2.3 Use of estimates and judgments The preparation of consolidated financial statements requires the Group’s management to make judgments, estimates and assumptions that affect the application of accounting policies and the reported amounts of assets, liabilities, income and expenses. By definition, the accounting estimates are rarely the same as the actual results. Accordingly, the Group’s management reviews the estimates and assumptions on an ongoing basis, based on previous experience and other relevant factors. Adjustments resulting from revisions to accounting estimates are recognized in the period in which the estimates are revised and applied on a prospective basis. The main accounts that require the adoption of estimates and assumptions, which are subject to a greater degree of uncertainty and may result in a material adjustment if these estimates and assumptions suffer significant changes in subsequent periods, are: · Note 6 – Consumers, Concessionaires and Licensees (Allowance for doubtful accounts: key assumptions regarding recoverable amounts); · Note 8 – Sector financial asset and liability (there would be certain new sector related financial components not included in the previous methodology); · Note 9 – Deferred tax assets and liabilities (recognition of assets: availability of future taxable profit against which the tax losses can be utilized); · Note 10 – Concession financial asset (assumptions for fair value measurement, based on significant unobservable inputs); · Note 11 – Other receivables (allowance for doubtful accounts, key assumptions regarding recoverable amounts); · Note 13 – Property, plant and equipment (application of definite useful lives and key assumptions regarding recoverable amounts); · Note 14 – Intangible assets (key assumptions regarding recoverable amounts); · Note 18 – Private pension plan (key actuarial assumptions used in the measurement of defined benefit obligations); · Note 21 – Provision for tax, civil and labor risks and escrow deposits (recognition and measurement: key assumptions on the probability and magnitude of outflow of resources); · Note 25 – Net operating revenue (assumptions for measurement of unbilled supply and Distribution System Usage Tariff - TUSD ); and · Note 33 – Financial instruments (assumptions for fair value measurement, based on significant unobservable inputs). 2.4 Functional currency and presentation currency The Group’s functional currency is the Brazilian Real, and the financial statements are presented in thousands of reais. Figures are rounded only after sum-up of the amounts. Consequently, when summed up, the amounts stated in thousands of reais may not tally with the rounded totals. 2.5 Segment information An operating segment is a component of the Company (i) that engages in operating activities from which it earns revenues and incurs expenses, (ii) whose operating results are regularly reviewed by Management to make decisions about resources to be allocated and assess the segment's performance, and (iii) for which individual financial information is available. The Group´s Management use reports to make strategic decisions, segmenting the business into: (i) electric energy distribution activities (“Distribution”); (ii) electric energy generation from conventional sources activities (“Generation”); (iii) electric energy generation activities from renewable sources (“Renewables”); (iv) energy commercialization activities (“Commercialization”); (v) service activities (“Services”); and (vi) other activities not listed in the previous items. The presentation of the operating segments includes items directly attributable to them, as well as any allocations required, including intangible assets, further details see note 29. 2.6 Information on equity interests The Company's equity interests in direct and indirect subsidiaries and joint ventures are described in note 1. Except for (i) the companies ENERCAN, BAESA, Chapecoense and EPASA, which use the equity method of accounting, and (ii) the investment stated at cost by the subsidiary Paulista Lajeado in Investco S.A., all other entities are fully consolidated. At December 31, 2017 and 2016, the noncontrolling interests recognized in the financial statements refer to the interests held by third parties in subsidiaries CERAN, Paulista Lajeado and CPFL Renováveis.

(3) SUMMARY OF SIGNIFICANT ACCO

(3) SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	12 Months Ended
	Dec. 31, 2017
Summary Of Significant Accounting Policies
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	The significant accounting policies used in preparing the Company’s financial statements are set out below. These policies have been consistently applied to all periods presented. 3.1 Cash and cash equivalents In the statements of cash flows, cash and cash equivalents include negative balances of overdraft accounts that are immediately payable and are an integral part of the Group’s cash management. Cash and cash equivalents comprise the balances of cash and financial investments with original maturities of three months or less from the contract date, which are subject to an insignificant risk of change in value and are used by the Company in the management of short-term obligations. 3.2 Concession agreements The IFRIC 12 – Service Concession Arrangements establish general guidelines for the recognition and measurement of obligations and rights related to concession agreements and apply to situations in which the granting authority controls or regulates which services the concessionaire should provide with the infrastructure, to whom the services should be provided and at what price, and controls any significant residual interest in the infrastructure at the end of the concession period. When these criteria are met, the infrastructure of distribution concessionaires is segregated at the time of construction in accordance with the IFRS requirements, so that the following are recognized in the financial statements (i) an intangible asset corresponding to the right to operate the concession and collect from the users of public utilities, and (ii) a financial asset corresponding to the unconditional contractual right to receive cash (indemnity) by transferring control of the assets at the end of the concession. The concession financial asset of distribution companies is measured based on its fair value, determined in accordance with the remuneration base for the concession assets, pursuant to the legislation in force established by the Brazilian Electricity Regulatory Agency (Agência Nacional de Energia Elétrica - ANEEL), and takes into consideration changes in the estimated cash flow, mainly based on factors such as new replacement price, and adjustment for Extended Comprehensive Consumer Price Index (“IPCA”) for the distribution subsidiaries. The financial asset of distribution companies is classified as available-for-sale, with the corresponding cash flow changes entry in the Net Operating Revenue in the statement of profit or loss for the year (notes 4 and 25). The financial asset of the transmission companies is classified as loans and receivables, initially measured at its fair value and subsequently at amortized cost using the effective interest method. The remaining amount is recognized as intangible asset and relates to the right to charge consumers for electric energy distribution services, and is amortized in accordance with the consumption pattern that reflects the estimated economic benefit to the end of the concession. Services related to the construction of infrastructure are recognized in accordance with IAS 11 – Construction Contracts, against a financial asset corresponding to the amount subject to right to receive cash (indemnity), residual amounts classified as intangible assets are amortized over the concession period in proportion to a curve that reflects the consumption pattern in relation to the economic benefits. Considering that (i) the tariff model that does not provide for a profit margin for the infrastructure construction services, (ii) the way in which the subsidiaries manage the constructions by using a high level of outsourcing, and (iii) the fact that there is no provision for profit margin on construction in the Company‘s business plans, Management is of the opinion that the margins on this operation are irrelevant, and therefore no mark-up to the cost is considered in revenue. The construction revenue and costs are therefore presented in the statement of profit or loss for the year in the same amounts. 3.3 Financial instruments - Financial assets Financial assets are recognized initially on the date that they are originated or on the trade date at which the Company or its subsidiaries become parties to the contractual provisions of the instrument. Derecognition of a financial asset occurs when the contractual rights to the cash flows from the asset expire or when the risks and rewards of ownership of the financial asset are transferred. The Group holds the following main financial assets: i. Fair value through profit or loss: these are assets held for trading or designated as such upon initial recognition. The Group manages such assets and make purchase and sale decisions based on their fair value in accordance with their documented risk management and investment strategy. These financial assets are measured at fair value, and changes therein are recognized in profit or loss for the year. ii. Held-to-maturity: these are assets that the Group has the positive intent and ability to hold to maturity. Held-to-maturity financial assets are recognized initially at fair value and subsequently measured at amortized cost using the effective interest method, less any impairment losses. iii. Loans and receivables: these are assets with fixed or determinable payments that are not quoted in an active market. Such assets are recognized initially at fair value and subsequently measured at amortized cost using the effective interest method, less any impairment losses. iv. Available-for-sale: these are non-derivative financial assets that are designated as available-for-sale or that are not classified into any of the previous categories. Subsequent to initial recognition, interest calculated using the effective interest method is recognized in the statement of profit or loss as part of the Net Operating Revenue for the variations on the expected cash flows of distribution companies, and changes in fair value of these financial assets are recognized in other comprehensive income. The accumulated result in other comprehensive income is transferred to profit or loss when the asset is realized. - Financial liabilities Financial liabilities are initially recognized on the date that they are originated or on the trade date at which the Company or its subsidiaries become a party to the contractual provisions of the instrument. The Group has the following main financial liabilities: i. Measured at fair value through profit or loss: these are financial liabilities that are: (i) held for short-term trading, (ii) designated at fair value in order to match the effects of recognition of income and expenses to obtain more relevant and consistent accounting information, or (iii) derivatives. These liabilities are measured at fair value and any change in their fair value is subsequently recognized in profit or loss. ii. Other financial liabilities (not measured at fair value through profit or loss): these are other financial liabilities not classified into the previous category. They are measured initially at fair value net of any cost attributable to the transaction and subsequently measured at amortized cost using the effective interest rate method. The Company recognizes financial guarantees when these are granted to non-controlled entities or when the financial guarantee is granted at a percentage higher than the Company's interest to cover commitments of joint ventures. Such financial guarantees are initially measured at fair value, by recognizing (i) a liability corresponding to the risk of non-payment of the debt, which is amortized against finance income simultaneously and in proportion to amortization of the debt, and (ii) an asset equivalent to the right to compensation by the guaranteed party or a prepaid expense under the guarantees, which is amortized by receipt of cash from other shareholders or at the effective interest rate over the term of the guarantee. After initial recognition, guarantees are measured periodically at the higher of the amount determined in accordance with IAS 37 and the amount initially recognized less accumulated amortization. Financial assets and liabilities are offset and presented at their net amount when, and only when, there is a legal right to offset the amounts and the intent to realize the asset and settle the liability simultaneously. The classifications of financial instruments are described in note 33. - Capital Common shares are classified as equity. Additional costs directly attributable to share issues and share options are recognized as a deduction from equity, net of any tax effects. 3.4 Property, plant and equipment Items of property, plant and equipment are measured at acquisition, construction or formation cost less accumulated depreciation and, if applicable, accumulated impairment losses. Cost also includes any other costs attributable to bringing the assets to the place and in a condition to operate as intended by Management, the cost of dismantling and restoring the site on which they are located and capitalized borrowing costs on qualifying assets. The replacement cost of items of property, plant and equipment is recognized if it is probable that it will involve economic benefits for the subsidiaries and if the cost can be reliably measured, and the value of the replaced item is written off. Maintenance costs are recognized in profit or loss as they are incurred. Depreciation is calculated on a straight-line basis, at annual rates of 2% to 20%, taking into consideration the estimated useful life of the assets, as instructed and defined by the granting authority. Gains and losses on disposal/ write-off of an item of property, plant and equipment are determined by comparing the proceeds from disposal with the carrying amount of the asset, and are recognized net within other operating income/expenses. Assets and facilities used in the regulated activities are tied to these services and may not be removed, disposed of, assigned or pledged in mortgage without the prior and express authorization of ANEEL. ANEEL, through Resolution No. 20 of February 3, 1999, amended by Normative Resolution No. 691 of December 8, 2015, releases Public Electric Energy Utility concessionaires from prior authorization for release of assets of no use to the concession, but determines that the proceeds from the disposal be deposited in a restricted bank account for use in the concession. 3.5 Intangible assets Includes rights related to non-physical assets such as goodwill and concession exploration rights, software and rights-of-way. Goodwill that arises on the acquisition of subsidiaries is measured based on the difference between the fair value of the consideration transferred for acquisition of a business and the net fair value of the assets, adding the portion of noncontrolling interests and liabilities of the subsidiary acquired. Goodwill is subsequently measured at cost less accumulated impairment losses. Goodwill and other intangible assets with indefinite useful lives, if any, are not subject to amortization and are tested annually for impairment. A bargain purchase is recognized as a gain in the statement of profit or loss in the year of the business acquisition. Intangible assets corresponding to the right to operate concessions may have three origins, as follows: i. Acquisitions through business combinations: the portion arising from business combinations that corresponds to the right to operate the concession is stated as an intangible asset and,amortized over the remaining period of the concessions, on a straight-line basis; ii. Investments in infrastructure: under the electric energy distribution concession agreements with the subsidiaries, the recognized intangible asset corresponds to the concessionaires' right to charge the consumers for use of the concession infrastructure. Since the exploration term is defined in the agreement, intangible assets with defined useful lives are amortized over the concession period in proportion to a curve that reflects the consumption pattern in relation to the economic benefits. For further information see note 3.2. Items comprised in the infrastructure are directly tied to the Company’s electric energy distribution operation and cannot be removed, disposed of, assigned or pledged in mortgage without the prior and express authorization of ANEEL. ANEEL, through Resolution No. 20 of February 3, 1999, amended by Normative Resolution No. 691 of December 8, 2015, releases Public Electric Energy Utility concessionaires from prior authorization for release of assets of no use to the concession, but determines that the proceeds from the disposal be deposited in a restricted bank account for use in the concession. iii. Use of Public Asset: upon certain generation concessions were granted with the condition of payments to the federal government for Use of Public Asset. On the signing date of the respective agreements the Company’s subsidiaries recognized intangible assets and the corresponding liabilities at fair value. The Company capitalizes interests on the Use of Public Assets intangible from the signing date to the date of commencement of the operations, when the whole intagible starts to be amortized on a straight-line basis over the remaining period of each concession. 3.6 Impairment - Financial assets A financial asset not measured at fair value through profit or loss is reassessed at each reporting date to determine whether there is objective evidence that it is impaired. Impairment can occur after the initial recognition of the asset and have a negative effect on the estimated future cash flows. The Group consider evidence of impairment of receivables and held-to-maturity securities for both specific asset and at a collective level for all significant securities. Receivables and held-to-maturity securities that are not individually significant are collectively assessed for impairment by grouping together the securities with similar risk characteristics. In assessing collective impairment the Company uses historical trends of the probability of default, timing of recoveries and the amount of loss incurred, adjusted for Management's judgment as to whether the assumptions and current economic and credit conditions are such that the actual losses are likely to be higher or lower than suggested by historical trends. An impairment loss of a financial asset is recognized as follows: I. Amortized cost: as the difference between the carrying amount and the present value of the estimated future cash flows discounted at the asset’s original effective interest rate. Losses are recognized in profit or loss and shown in an allowance account against receivables. When a subsequent event indicates that the amount of impairment loss has decreased, this reduction is reversed as a credit through profit or loss. II. Available-for-sale: as the difference between the acquisition cost, net of any reimbursement and principal repayment, and the current fair value, less any impairment loss previously recognized in profit or loss. In the case of financial assets carried at amortized cost and/or debt instruments classified as available-for-sale, if an increase (gain) is identified in subsequent periods, the impairment loss is reversed through profit or loss. However, any subsequent recovery in the fair value of an impaired equity instrument classified as available-for-sale is recognized in other comprehensive income. - Non-financial assets Non-financial assets that have indefinite useful lives, such as goodwill, are tested annually for impairment to assess whether the asset's carrying amount does not exceed its recoverable amount. Other assets subject to amortization are tested for impairment whenever events or changes in circumstances indicate that the carrying amount may be impaired. An impairment loss is recognized if the carrying amount of an asset exceeds its estimated recoverable amount, which is the greater of (i) its fair value less costs to sell and (ii) its value in use. The assets ( e.g. 3.7 Provisions A provision is recognized if, as a result of a past event, there is a legal or constructive obligation that can be estimated reliably, and it is probable (more likely than not) that an outflow of economic benefits will be required to settle the obligation. When applicable, provisions are determined by discounting the expected future cash outflows at a rate that reflects current market assessment and the risks specific to the liability. The unwinding of the discount is recognized as finance cost. 3.8 Employee benefits Certain subsidiaries have post-employment benefits and pension plans, recognized in accordance with IAS 19 “Employee benefits” (as revised 2011), and are regarded as Sponsors of these plans. Although the plans have particularities, they have the following characteristics: i. Defined contribution plan: a post-employment benefit plan under which the Sponsor pays fixed contributions into a separate entity and will have no liability for the actuarial deficits of the plan. The obligations are recognized as an expense in the statement of profit or loss in the periods during which the services are rendered. ii. Defined benefit plan: The net obligation is calculated as the difference between the present value of the actuarial obligation based on assumptions, biometric studies and interest rates in line with market rates, and the fair value of the plan assets as of the reporting date. The actuarial liability is calculated annually by independent actuaries, under the responsibility of Management, using the projected unit credit method. Actuarial gains and losses are recognized in other comprehensive income when they occur. Net Interest (income or expense) is calculated by applying the discount rate at the beginning of the period to the net amount of the defined benefit asset or liability. When applicable, the cost of past services is recognized immediately in profit or loss. If the plan records a surplus and it becomes necessary to recognize an asset, the recognition is limited to the present value of future economic benefits available in the form of reimbursements or future reductions in contributions to the plan. 3.9 Dividends and Interest on capital Under Brazilian law, the Company is required to distribute a mandatory minimum annual dividend of 25% of profit adjusted in accordance with the Company´s bylaws. In conformity with IAS 10 a provision may only be made for the minimum mandatory dividend, and dividends declared but not yet approved are only recognized as a liability in the financial statements after approval by the competent body. According to Law 6,404/76, they will therefore be held in equity, in the “additional dividend proposed” account, as they do not meet the present obligation criteria at the reporting date. As established in the Company's bylaws and in accordance with current corporate law, the Board of Directors is responsible for declaring an interim dividend and interest on capital determined in a half-yearly statement of income. An interim dividend and interest on capital declared at the base date of June 30 is only recognized as a liability in the Company's financial statement after the date of the Board of Directors' decision. Interest on capital is treated in the same way as dividends and is also stated in changes in equity. The withholding income tax on interest on capital is always recognized as a charge to equity with a balancing item in liabilities upon the proposal for its payment, even if not yet approved, since it meets the criterion of obligation at the time of Management’s proposal. 3.10 Revenue recognition The operating revenue in the normal course of the subsidiaries’ activities is measured at the fair value of the consideration received or receivable. The operating revenue is recognized when there is persuasive evidence that all significant risks and rewards were transferred to the buyer, it is probable that future economic benefits will flow to the entity, the associated costs can be reliably measured, and the amount of the operating revenue can be reliably measured. The revenue from electric energy distribution is recognized when the energy is supplied. The energy distribution subsidiaries perform the reading of their customers based on a reading routine (calendar and reading route) and invoice monthly the consumption of MWh based on the reading performed for each consumer. As a result, part of the energy distributed during the month is not billed at the end of the month and, consequently, an estimate is developed by Management and recorded as “Unbilled”. This unbilled revenue estimate is calculated using as a base the total volume of energy of each distributor made available in the month and the annualized rate of technical and commercial losses. The revenue from energy generation sales is recognized based on the assured energy and at tariffs specified in the terms of the supply contracts or the current market price, as appropriate. The revenue from energy trading is recognized based on bilateral contracts with market agents and properly registered with the Electric Energy Trading Chamber – CCEE. No single consumer accounts for 10% or more of the Company’s total revenue. The revenue from services provided is recognized when the service is provided, under a service agreement between the parties. The revenue from construction contracts is recognized based on the percentage of completion method, and losses, if any, are recognized the statement of profit or loss as incurred. 3.11 Income tax and social contribution Income tax and social contribution expenses are calculated and recognized in accordance with the legislation in force and comprise current and deferred taxes. Income tax and social contribution are recognized in the statement of profit or loss except to the extent that they relate to items recognized directly in equity or other comprehensive income, when the net amounts of these tax effects are already recognized, and those arising from the initial recognition in business combinations. Current taxes are the expected taxes payable or receivable/recoverable on the taxable profit or loss. Deferred taxes are recognized for temporary differences between the carrying amounts of assets and liabilities for accounting purposes and the equivalent amounts used for tax purposes and for tax loss carryforwards. The Company and certain subsidiaries recognize in their financial statements the effects of tax loss carryforwards and deductible temporary differences, based on projections of future taxable profits, approved annually by the Boards of Directors and examined by the Fiscal Council. The subsidiaries also recognized tax credits relating to the tax benefits created by the corporate restructuring, which are amortized on a straight line basis for the remaining period of each concession agreement. Deferred tax assets and liabilities are offset if there is a legally enforceable right to offset current tax liabilities and assets, and they relate to taxes levied by the same tax authority on the same taxable entity. Deferred income tax and social contribution assets are reviewed at each reporting date and are reduced to the extent that it is no longer probable that the related taxes benefit will be realized. 3.12 Earnings per share Basic earnings per share are calculated by dividing the profit or loss for the year attributable to the Company’s controlling shareholders by the weighted average number of shares outstanding during the year. Diluted earnings per share are calculated by dividing the profit or loss for the year attributable to the controlling shareholders, adjusted by the effects of instruments that potentially would have impacted the profit or loss for the year by the weighted average of the number of shares outstanding, adjusted by the effects of all dilutive potential convertible notes for the reporting periods. 3.13 Government grants – CDE (Energy Development Account) Government grants are only recognized when it is reasonably certain that these amounts will be received by the Group. They are recognized in profit or loss for the periods in which the Company recognizes as income the discounts granted in relation to the low-income subsidy and other tariff discounts. The subsidies received through funds from the CDE (note 25) have the main purpose of offsetting discounts granted in order to provide immediate financial support to the distribution companies. 3.14 Sector financial asset and liability According to the tariff pricing mechanism applicable to distribution companies, the energy tariffs should be set at a price level (price cap) that ensures the economic and financial equilibrium of the concession, therefore, the concessionaires and licensees are authorized to charge their consumers (after review and ratification by ANEEL) for: (i) the annual tariff increase; and (ii) every four or five years, according to each concession agreement, the periodic review for purposes of reconciliation of part of Parcel B (controllable costs) and adjustment of Parcel A (non-controllable costs). The distributors' revenue is mainly comprised of the sale of electric energy and for the delivery (transport) of the electric energy via the distribution infrastructure (network). The distribution concessionaires' revenue is affected by the volume of energy delivered and the tariff. The electric energy tariff is comprised of two parcels which reflect a breakdown of the revenue: · Parcel A (non-controllable costs): this parcel should be neutral in relation to the entity's performance, i.e. · Parcel B (controllable costs) – comprised of capital expenditure on investments in infrastructure, operational costs and maintenance and remuneration to the providers of capital. It is this parcel that actually affects the entity's performance, since it has no guarantee of tariff neutrality and thus involves an intrinsic business risk. This tariff pricing mechanism can cause temporary differences arising from the difference between the budgeted costs (Parcel A and other financial components) included in the tariff at the beginning of the tariff period and those actually incurred while it is in effect. This difference constitutes a right of the concessionaire to receive cash when the budgeted costs included in the tariff are lower than those actually incurred, or an obligation to pay if the budgeted costs are higher than those actually incurred. 3.15 Business combination Business combinations are accounted for by applying the acquisition method. The consideration transferred in a business combination is measured at fair value, calculated as the sum of the fair values of the assets transferred by the acquirer, the liabilities incurred and the equity interests issued by the Company and subsidiaries in exchange for control of the acquiree. Costs related to the acquisition are generally recognized in profit or loss, when incurred. At the acquisition date, assets and liabilities are recognized at fair value, except for: (i) deferred taxes, (ii) employee benefits and (iii) equity instruments. The noncontrolling interests are initially measured either at fair value or at the noncontrolling interests’ proportionate share of the acquiree’s identifiable net assets. The measurement method is chosen on a transaction-by-transaction basis. The excess of the consideration transferred, added to the portion of noncontrolling interests, over the fair value of the identifiable assets (including the concession intangible asset) and net liabilities assumed at the acquisition date are recognized as goodwill. In the event that the fair value of the identifiable assets and net liabilities assumed exceeds the consideration transferred, a bargain purchase is identified and the gain is recognized in the statement of profit or loss at the acquisition date. 3.16 Basis of consolidation (i) Business combinations The Company measures goodwill as the fair value of the consideration transferred including the recognized amount of any noncontrolling interest in the acquiree, less the recognized fair value of the identifiable assets acquired and liabilities assumed, all measured at the acquisition date. (ii) Subsidiaries and joint ventures The financial statements of subsidiaries are included in the consolidated financial statements from the date that control commences until the date that control ceases. Joint ventures are accounted for using the equity method of accounting from the moment joint control is established. The accounting policies of subsidiaries and joint ventures taken into consideration for purposes of consolidation and/or equity method of accounting, as applicable, are aligned with the Company's accounting policies. The consolidated financial statements include the balances and transactions of the Company and its subsidiaries. The balances and transactions of assets, liabilities, income and expenses have been fully consolidated for the subsidiaries. Intragroup balances and transactions, and any income and expenses derived from these transactions, are eliminated in preparing the consolidated financial statements. Unrealized gains arising from transactions with equity accounted investees are eliminated against the investment to the extent of the Company’s interest in the investee. Unrealized losses are eliminated in the same way as unrealized gains, but only to the extent that there is no evidence of impairment. In the case of subsidiaries, the portion related to noncontrolling interests is stated in equity and in the statements of profit or loss and comprehensive income in each period presented. The balances of joint ventures, as well as the Company’s interest in each of them are described in note 12.2. (iii) Acquisition of noncontrolling interests Accounted for as transaction among shareholders. Consequently, no asset or goodwill is recognized as a result of such transaction. 3.17 New standards and interpretations issued and effective A number of IASB standards were issued or revised and are mandatory for accounting periods beginning on January 1, 2017: a) Amendments to IAS 12 – Recognition of deferred tax assets for unrealized losses Issued on January 19, 2016, the amendments to IAS 12 clarify the requirements of recognition of deferred tax assets for unrealized losses on debt instruments and the method to assess whether taxable profits will be available against which the entity can utilize a deductible temporary difference, to address the diversity in practice. The application of the amendments to IAS 12 did not have material impacts on the Company’s consolidated financial statements for the year ended December 31, 2017. b) Amendments to IAS 7 – Statement of Cash Flows Issued on January 29, 2016, the amendments to IAS 7 Disclosure Initiative require an entity to provide disclosures that enable users of financial statements to evaluate changes in liabilities arising from financing activities. The application of the amendments to IAS 7 resulted in changes in the disclosure of the movement of financial assets and liabilities the cash flows of which are classified as financing activity. The changes of these amendments to IAS 7 generated additional disclosure reflected in notes 17 – Borrowings, 18 – Debentures and 33 – Financial Instruments. c) Annual Improvements to IFRS / 2014 – 2016 Cycle Annually, the IASB discusses and decides on the proposed improvements to IFRS, as they are raised during the year. On December 8, 2016, the amendments relating to the 2014-2016 Cycle were issued, one of which is effective for annual periods beginning on or after January 1, 2017. Amendments to IFRS 12 Considering that the Company does not have interest in other entities that are classified as held for sale or discontinued operations, these amendments did not have effects on the disclosures and amounts recognized in the consolidated financial statements for the year ended December 31, 2017. 3.18 New standards and interpretations issued but not yet effective A number of new IFRS standards and amendments to the standards and interpretations were issued by the IASB and had not yet come into effect for annual periods beginning on January 1, 2017. Consequently, the Company has not early adopted them: a) IFRS 9 - Financial instruments IFRS 9 is effective for the financial statements of an entity prepared in accordance with IFRS for annual periods beginning on or after January 1, 2018. This standard establishes new requirements for classification and measurement of financial assets and liabilities. Financial assets are classified into three categories: (i) measured at fair value through profit or loss; (ii)

(4) DETERMINATION OF FAIR VALUE

(4) DETERMINATION OF FAIR VALUES	12 Months Ended
	Dec. 31, 2017
Determination Of Fair Values
DETERMINATION OF FAIR VALUES	A number of the Group’s accounting policies and disclosures require the determination of fair value, for both financial and non-financial assets and liabilities. Fair values have been determined for measurement and / or disclosure purposes based on the following methods. When applicable, further information on the assumptions used in determining fair values is disclosed in the notes specific to that asset or liability. The Group measures fair value in accordance with IFRS 13, which defines fair value as the estimated price for an unforced transaction for the sale of the asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date, under current market conditions. - Property, plant and equipment and intangible assets The fair value of property, plant and equipment and intangible assets recognized as a result of a business combination is based on the market approach and cost approaches using quoted market prices for similar items when available and replacement cost when appropriate. - Financial instruments Financial instruments measured at fair values are valued based on quoted prices in an active market, or, if such prices were not available, assessed using pricing models, applied individually for each transaction, taking into consideration the future cash flows, based on the conditions contracted, discounted to present value at market interest rate curves, based on information obtained, when available, from the Bolsa de Valores, Mercadorias e Futuros Associação Brasileira das Entidades dos Mercados Financeiro e de Capitais Financial assets classified as available-for-sale refer to the right to compensation, to be paid by the Federal Government regarding the assets of the distribution concessionaires at the end of the concession agreement. The methodology adopted for marking these assets to fair value is based on the tariff review process for distributors. This review, conducted every four or five years according to each concessionaire, involves assessing the replacement price for the distribution infrastructure, in accordance with criteria established by the granting authority (“ANEEL”). This valuation basis is used for pricing the tariff, which is increased annually up to the next tariff review, based on the parameter of the main inflation indices. Accordingly, at the time of the tariff review, each distribution concessionaire adjusts the position of the financial asset base for compensation at the amounts ratified by the granting authority and uses the IPCA as the best estimates for adjusting the original base to the updated value at subsequent dates, in accordance with the tariff review process.

(5) CASH AND CASH EQUIVALENTS

(5) CASH AND CASH EQUIVALENTS	12 Months Ended
	Dec. 31, 2017
Cash and Cash Equivalents [Abstract]
CASH AND CASH EQUIVALENTS	Dec 31, 2017 Dec 31, 2016 Bank balances 365,031 170,884 Short-term financial investments 2,884,611 5,994,112 Overnight investment (a) 178,444 95,034 Bank certificates of deposit (b) 785,074 2,357,187 Repurchase agreements secured on debentures (b) 3,268 58,616 Investment funds (c) 1,917,826 3,483,274 Total 3,249,642 6,164,997 (a) Current account balances, which earn daily interest by investment in repurchase agreements secured on Bank Certificate Deposit (CDB) and interest of 15% of the variation in the Interbank Certificate of Deposit (CDI). (b) Short-term investments in Bank Certificates of Deposit (CDB) and repurchase agreements secured on debentures with major financial institutions that operate in the Brazilian financial market, with daily liquidity, short-term due, low credit risk and interest equivalent, on average, to 101.87% of the CDI. (c) Exclusive Fund investments, with daily liquidity and interest equivalent, on average, of 100% of the CDI, subject to floating rates tied to the CDI linked to their investments in federal government bonds, CDBs, financial bills and secured debentures of major financial institutions, with low credit risk and short-term due.

(6) CONSUMERS, CONCESSIONAIRES

(6) CONSUMERS, CONCESSIONAIRES AND LICENSEES	12 Months Ended
	Dec. 31, 2017
Consumers Concessionaires And Licensees
CONSUMERS, CONCESSIONAIRES AND LICENSEES	The balance derives mainly from the supply of electric energy. The following table shows the breakdown at December 31, 2017 and 2016: Amounts coming due Past due Total until 90 days > 90 days Dec 31, 2017 Dec 31, 2016 Current Consumer classes Residential 602,525 457,273 53,805 1,113,604 932,380 Industrial 322,250 77,148 84,232 483,630 386,826 Commercial 254,605 86,290 41,574 382,470 317,111 Rural 74,136 18,409 6,117 98,663 97,444 Public administration 69,333 15,638 3,939 88,910 94,348 Public lighting 58,475 6,573 2,485 67,533 73,142 Public utilities 87,159 8,972 4,713 100,843 97,503 Billed 1,468,483 670,303 196,865 2,335,653 1,998,754 Unbilled 1,008,486 - - 1,008,486 1,095,188 Financing of consumers' debts 169,171 20,784 39,885 229,840 170,982 CCEE transactions 182,128 229,887 1,052 413,067 289,761 Concessionaires and licensees 508,046 423 7,950 516,419 390,333 Others 36,011 - - 36,011 39,974 3,372,325 921,397 245,752 4,539,476 3,984,991 Allowance for doubtful accounts (238,193) (219,098) Total 4,301,283 3,765,893 Noncurrent Financing of consumers' debts 217,944 - - 217,944 198,875 Free Energy 5,976 - - 5,976 5,436 CCEE transactions 41,301 - - 41,301 41,301 265,221 - - 265,221 245,612 Allowance for doubtful accounts (28,683) (42,427) Total 236,539 203,185 Financing of Consumers' Debts - Electric Energy Trading Chamber (CCEE) transactions - Concessionaires and Licensees Allowance for doubtful accounts Movements in the allowance for doubtful accounts are shown below: Consumers, concessionaires and licensees Other Total As of December 31, 2014 (123,171) (15,285) (138,456) Allowance - reversal (recognition) (170,131) (1,152) (171,283) Recovery of revenue 44,338 67 44,405 Write-off of accrued receivables 89,770 1,930 91,700 As of December 31, 2015 (159,194) (14,441) (173,634) Business combination (70,636) (16,187) (86,823) Allowance - reversal (recognition) (258,377) (969) (259,347) Recovery of revenue 82,393 605 82,998 Write-off of accrued receivables 144,289 3,000 147,289 As of December 31, 2016 (261,525) (27,992) (289,517) Allowance - reversal (recognition) (263,668) (1,439) (265,107) Recovery of revenue 110,008 - 110,008 Write-off of accrued receivables 148,309 52 148,361 As of December 31, 2017 (266,876) (29,379) (296,255) Current (238,193) (29,379) (267,572) Noncurrent (28,683) - (28,683) The allowance for doubtful debts is set up based on the history and probability of default and, specifically for distributors, according to the following criteria: Class Past due over: Residential 90 days Commercial 180 days Other classes 360 days Sundry bills 180 days Debts in installments 90 days. In the event of default in one of the installments, the whole receivable from the customer is subject to impairment.

(7) TAXES RECOVERABLE

(7) TAXES RECOVERABLE	12 Months Ended
	Dec. 31, 2017
Taxes Recoverable
TAXES RECOVERABLE	Dec 31, 2017 Dec 31, 2016 Current Prepayments of social contribution - CSLL 7,257 14,141 Prepayments of income tax - IRPJ 21,887 35,534 Income tax and social contribution to be offset 59,658 94,268 Income tax and social contribution recoverable 88,802 143,943 Withholding income tax - IRRF on interest on capital 43,841 3,642 Withholding income tax - IRRF 103,277 115,189 State VAT - ICMS to be offset 104,843 82,090 Social Integration Program - PIS 8,447 9,062 Contribution for Social Security Funding - COFINS 37,699 39,984 National Social Security Institute - INSS 7,597 6,374 Others 541 3,564 Other taxes recoverable 306,244 259,905 Total current 395,046 403,848 Noncurrent Social contribution to be offset - CSLL 58,856 55,498 Income tax to be offset - IRPJ 2,608 10,037 Income tax and social contribution recoverable 61,464 65,535 State VAT - ICMS to be offset 159,624 122,415 Social Integration Program - PIS 1,024 800 Contribution for Social Security Funding - COFINS 4,719 3,687 Others 6,613 5,849 Other taxes recoverable 171,980 132,751 Total noncurrent 233,444 198,286 Withholding income tax - IRRF Social contribution to be offset – CSLL State VAT - ICMS to be offset

(8) SECTOR FINANCIAL ASSETS AND

(8) SECTOR FINANCIAL ASSETS AND LIABILITIES	12 Months Ended
	Dec. 31, 2017
Sector Financial Assets And Liabilities
SECTOR FINANCIAL ASSETS AND LIABILITIES	The breakdown and changes for the year in the balances of Sector financial asset and liability is as follows: As of December 31, 2016 Operating revenue Finance income /expense Receipt As of December 31, 2017 Deferred Approved Total Constitution Realization Monetary adjustment Tariff flag Deferred Approved Total Parcel "A" (762,573) 190,369 (572,203) 1,187,928 536,269 (76,726) (386,242) 924,943 (235,916) 689,026 CVA (*) CDE (**) (342,161) (70,301) (412,462) (405,409) 356,715 (38,267) - (235,901) (263,520) (499,422) Electric energy cost (506,490) (239,777) (746,267) 2,018,754 751,840 (31,144) (385,704) 1,625,759 (18,280) 1,607,479 ESS and EER (***) (406,568) (124,411) (530,979) (1,003,482) 450,638 (57,165) (151) (974,091) (167,048) (1,141,139) Proinfa 3,492 31,414 34,906 (28,048) (18,829) (6,600) - (610) (17,961) (18,572) Basic network charges 27,527 9,660 37,187 1,448 (35,035) (376) - (20,163) 23,387 3,224 Pass-through from Itaipu 147,012 442,911 589,923 1,022,892 (570,453) 43,016 - 959,518 125,860 1,085,378 Transmission from Itaipu 7,646 7,281 14,927 13,992 (13,705) 394 - 7,802 7,806 15,608 Neutrality of industry charges 142,091 164,375 306,466 89,103 (258,685) 7,767 - 32,566 112,084 144,651 Overcontracting 164,878 (30,782) 134,096 (521,321) (126,217) 5,648 (387) (469,937) (38,244) (508,181) Other financial components (182,958) (159,759) (342,717) (72,877) 249,516 (5,607) - (193,496) 21,812 (171,685) Refunds related to judicial injuctions (76,615) (132,410) (209,025) (10,038) 190,291 805 - - (27,968) (27,968) Others (106,343) (27,349) (133,692) (62,839) 59,226 (6,412) - (193,496) 49,780 (143,717) Total (945,530) 30,612 (914,918) 1,115,051 785,786 (82,333) (386,242) 731,447 (214,104) 517,341 Current assets - 210,834 Noncurrent assets - 355,003 Current liabilities (597,515) (40,111) Noncurrent liabilities (317,406) (8,385) As of December 31, 2015 Operating revenue Finance income/cost Receipt As of December 31, 2016 Deferred Approved Total Constitution Through billing Monetary adjustment Tariff flag (note 27.5) Business Combination Deferred Approved Total Parcel "A" 1,490,744 519,838 2,010,582 (644,484) (1,260,579) 28,166 (687,673) (18,213) (762,573) 190,369 (572,203) CVA (*) CDE (**) 407,295 109,937 517,232 (612,336) (329,898) (4,020) - 16,561 (342,161) (70,301) (412,462) Electric energy cost (466,337) 472,428 6,091 81,164 (179,617) (101,982) (417,883) (134,041) (506,490) (239,777) (746,267) ESS and EER (***) (25,128) (249,081) (274,209) (225,794) 385,941 (56,038) (269,352) (91,527) (406,568) (124,411) (530,979) Proinfa (814) (5,334) (6,148) 51,060 (19,335) 7,219 - 2,111 3,492 31,414 34,906 Basic network charges 28,185 68,289 96,474 19,517 (84,894) (1,449) - 7,539 27,527 9,660 37,187 Pass-through from Itaipu 1,281,279 39,416 1,320,695 (116,276) (921,201) 197,581 - 109,124 147,012 442,911 589,923 Transmission from Itaipu 11,372 4,097 15,469 8,102 (13,754) 2,163 - 2,948 7,646 7,281 14,927 Neutrality of industry charges 187,765 2,508 190,273 198,274 (171,420) 15,730 - 73,609 142,091 164,375 306,466 Overcontracting 67,127 77,578 144,705 (48,195) 73,600 (31,037) (439) (4,537) 164,878 (30,782) 134,096 Other financial components (92,098) 35,480 (56,618) (195,758) 6,126 (20,498) - (75,968) (182,958) (159,759) (342,717) Refunds related to judicial injuctions (note 27.4) - - - (223,356) 31,419 (17,088) - - (76,615) (132,410) (209,025) Others (92,098) 35,480 (56,618) 27,598 (25,294) (3,410) - (75,968) (106,343) (27,349) (133,692) Total 1,398,646 555,318 1,953,964 (840,241) (1,254,453) 7,668 (687,673) (94,181) (945,530) 30,612 (914,918) Current assets 1,464,019 - Noncurrent assets 489,945 - Current liabilities - (597,515) Noncurrent liabilities - (317,406) (*) Deferred tariff costs and gains variations from Parcel “A” items (**) Energy Development Account – CDE (***) System Service Charge (ESS) and Reserve Energy Charge (EER) a) CVA Refers to the variations of the Parcel “A” account, in accordance with note 3.14. These amounts are adjusted based on the SELIC rate and are compensated in the subsequent tariff processes. b) Neutrality of industry charges Refers to the neutrality of the industry charges contained in the electric energy tariffs, calculating the monthly differences between the amounts billed relating to such charges and the respective amounts considered at the time the distributors’ tariff was set. c) Energy overcontracting Electric energy distribution concessionaires are required to guarantee 100% of their energy market through contracts approved, registered and ratified by ANEEL. It is also assured to the distribution concessionaries that costs or revenues derived from energy overcontracting will be passed through the tariffs, limited to 5% of the energy load requirement, as well as the costs related to electric energy deficits. These amounts are adjusted based on SELIC rate and are compensated in the subsequent tariff processes. d) Other financial components Refers mainly to: (i) excess demand and excess reactive power that, from the 4th cycle of periodic tariff review, became a financial component that will only be amortized upon the approval of the 5th cycle of periodic tariff review, for subsidiaries CPFL Piratininga, Companhia Luz e Força Santa Cruz, Companhia Leste Paulista, Companhia Jaguari de Energia, Companhia Sul Paulista de Energia, Companhia Luz e Força de Mococa (grouped in 2017 under the trade name “CPFL Santa Cruz” as mentioned in note 14.4.2); (ii) financial guarantees related to the compensation of the cost of the previous offering of guarantees required from distributors for carrying out commercial transactions among the industry’s agents, (iii) financial components related to the recalculations of the tariff processes, to neutralize the effects to consumers, and (iv) Abrace judicial injunction in accordance with Order No. 1,576/2016.

(9) DEFERRED TAX ASSETS AND LIA

(9) DEFERRED TAX ASSETS AND LIABILITIES	12 Months Ended
	Dec. 31, 2017
Deferred tax assets and liabilities [abstract]
DEFERRED TAX ASSETS AND LIABILITIES	9.1- Breakdown of tax assets and liabilities Dec 31, 2017 Dec 31, 2016 Social contribution credit (debit) Tax losses carryforwards 103,903 123,389 Tax benefit of merged goodwill 105,065 86,377 Temporarily nondeductible differences (305,677) (332,750) Subtotal (96,708) (122,984) Income tax credit (debit) Tax losses carryforwards 303,543 358,683 Tax benefit of merged goodwill 342,262 295,987 Temporarily nondeductible differences (844,948) (923,383) Subtotal (199,141) (268,713) PIS and COFINS credit (debit) Temporarily nondeductible differences (10,543) (9,580) Total (306,392) (401,276) Total tax credit 943,199 922,858 Total tax debit (1,249,591) (1,324,134) 9.2 - Tax benefit of merged intangible Refers to the tax asset calculated on the intangible derived from the acquisition of subsidiaries, as shown in the following table, which had been incorporated and is recognized in accordance with Instructions No. 319/99 and No. 349/01 issued by the Brazilian Securities and Exchange Commission (“CVM”). The benefit is realized proportionally to the tax amortization of the merged intangible that gave rise to it, during the remaining concessions period, as shown in note 14. December 31, 2017 December 31, 2016 Social contribution Income tax Social contribution Income tax CPFL Paulista 45,872 127,421 50,497 140,270 CPFL Piratininga 11,215 38,491 12,251 42,044 RGE 21,513 88,843 23,629 97,584 RGE Sul 26,466 73,515 - - CPFL Geração - 13,992 - 16,090 Total 105,065 342,262 86,377 295,987 9.3 - Accumulated balances of temporarily nondeductible/nontaxable differences December 31, 2017 December 31, 2016 Social contribution Income tax PIS/COFINS Social contribution Income tax PIS/COFINS Temporarily nondeductible differences Provision for tax, civil and labor risks 53,687 149,130 - 45,065 125,182 - Private pension fund 2,331 6,476 - 1,711 4,753 - Allowance for doubtful debts 27,354 75,985 - 26,543 73,729 - Accrued energy from the Free Market 8,382 23,284 - 7,718 21,440 - Research and development and energy efficiency programs 21,851 60,697 - 17,474 48,538 - Personnel-related provisions 4,111 11,420 - 3,422 9,506 - Depreciation rate difference 5,535 15,374 - 6,200 17,223 - Derivatives (48,848) (135,690) - (54,368) (151,023) - Recognition of concession - adjustment of intangible asset (IFRS) (7,291) (20,253) - (8,355) (23,208) - Recognition of concession - adjustment of financial asset (IFRS) (117,527) (324,387) (7,881) (104,080) (287,990) (6,157) Actuarial losses (IFRS) 25,716 71,432 - 25,390 70,527 - Financial instruments (IFRS) (5,291) (14,694) - (10,022) (27,838) - Accelerated depreciation (104) (288) - (73) (204) - Others (15,699) (41,527) (2,662) 4,491 12,281 (3,423) Temporarily nondeductible differences - accumulated comprehensive income: Property, plant and equipment - adjustment of deemed cost (IFRS) (51,961) (144,336) - (55,223) (153,398) - Actuarial losses (IFRS/CPC) 36,607 101,687 - 49,698 138,051 - Temporarily nondeductible differences - Business combination - CPFL Renováveis Deferred taxes - asset: Provision for tax, civil and labor risks 13,188 36,635 - - - - Fair value of property, plant and equipment (negative value added of assets) 21,294 59,150 - 22,771 63,252 - Deferred taxes - liability: Fair value of property, plant and equipment (value added of assets) (25,811) (71,699) - (27,472) (76,310) - Value added derived from determination of deemed cost (62,354) (173,207) - (78,443) (217,897) - Intangible asset - exploration right/authorization in indirect subsidiaries acquired (184,703) (513,064) - (183,443) (509,563) - Other temporary differences (6,145) (17,071) - (21,754) (60,435) - Total (305,677) (844,947) (10,543) (332,750) (923,383) (9,580) 9.4 - Reconciliation of the income tax and social contribution amounts recognized in the statements of income for the years ended December 31, 2017, 2016 and 2015: 2017 2016 2015 Social contribution Income tax Social contribution Income tax Social contribution Income tax Profit before taxes 1,846,670 1,846,670 1,380,547 1,380,547 1,454,454 1,454,454 Reconciliation to reflect effective rate: Equity interest in associates and joint ventures (312,390) (312,390) (311,414) (311,414) (216,885) (216,885) Amortization of intangible asset acquired 48,649 62,756 48,649 62,756 84,484 108,797 Effect of presumed profit regime (352,101) (430,296) (175,110) (234,827) (186,546) (244,541) Adjustment of revenue from excess demand and excess reactive power 134,778 134,778 119,272 119,272 117,374 117,374 Tax incentive - operating profit - (71,340) - (112,232) - (85,760) Other permanent additions (exclusions), net 74,015 82,631 6,420 (24,063) 42,310 59,450 Tax base 1,439,621 1,312,809 1,068,364 880,040 1,295,193 1,192,890 Statutory rate 9% 25% 9% 25% 9% 25% Tax credit (debit) (129,566) (328,202) (96,153) (220,010) (116,567) (298,223) Recognized (unrecognized) tax credit, net (39,162) (106,699) (54,706) (130,621) (43,595) (120,792) Total (168,728) (434,901) (150,859) (350,631) (160,162) (419,015) Current (153,543) (387,076) (244,015) (623,183) (10,916) (1,944) Deferred (15,185) (47,825) 93,156 272,552 (149,246) (417,071) Amortization of intangible asset acquired Recognized (unrecognized) tax assets, net The deferred income tax and social contribution expense recorded in the statement of profit or loss in the amount of R$ 63,010 refers to (i) income tax and social contribution losses (R$ 74,626); (ii) tax benefit of the merged intangible (R$ 35,018) and (iii) temporary differences (revenue of R$ 46,634). 9.5 Income tax and social contribution amounts recognized in equity The deferred income tax and social contribution recognized directly in equity (other comprehensive income) in 2017, 2016 and 2015 were as follows: 2017 2016 2015 Social Contribution Income tax Social Contribution Income tax Social Contribution Income tax Actuarial losses (gains) (166,857) (166,857) 527,436 527,436 (84,635) (84,635) Limits on the asset ceiling 21,399 21,399 (8,738) (8,738) 7,984 7,984 Basis of calculation (145,458) (145,458) 518,698 518,698 (76,651) (76,651) Statutory rate 9% 25% 9% 25% 9% 25% Calculated taxes 13,092 36,365 (46,683) (129,675) 6,899 19,163 Limitation on recognition (reversal) of tax credits - - 13,720 38,112 (3,959) (10,998) Taxes recognized in other comprehensive income 13,092 36,365 (32,962) (91,562) 2,940 8,165 9.6 Unrecognized deferred tax assets As of December 31, 2017, the parent company has tax credits on tax loss carryforwards that were not recognized amounting to R$ 86,977 since currently there is not probable that taxable profits will be available in the future. This amount can be recognized in the future, according to the annual reviews of taxable profit projections. Some subsidiaries have also income tax and social contribution credits on tax loss carryforwards that were not recognized because currently there is no reasonable assurance that sufficient future taxable profits will be generated to absorb them. At December 31, 2017, the main subsidiaries that have such income tax and social contribution credits are CPFL Renováveis (R$ 952,402), RGE Sul (R$248,705), Sul Geradora (R$ 72,645), CPFL Telecom (R$ 33,321) and CPFL Jaguari Geração (R$ 2,486). These tax losses can be carried forward indefinitely.

(10) CONCESSION FINANCIAL ASSET

(10) CONCESSION FINANCIAL ASSET	12 Months Ended
	Dec. 31, 2017
Concession Financial Asset
CONCESSION FINANCIAL ASSET	Distribution Transmission Total As of December 31, 2014 3,296,837 77,779 3,374,616 Current 540,094 - 540,094 Noncurrent 2,756,744 77,779 2,834,522 Additions 330,062 37,469 367,531 Transfers to intangible assets - extended concessions (537,198) - (537,198) Adjustment of expected cash flow 414,800 - 414,800 Adjustment - financial asset measured at amortized cost - 11,400 11,400 Cash inputs - RAP - (3,257) (3,257) Disposals (20,788) - (20,788) As of December 31, 2015 3,483,713 123,391 3,607,104 Current - 9,630 9,630 Noncurrent 3,483,713 113,761 3,597,474 Additions 655,456 50,580 706,036 Adjustment of expected cash flow 203,452 - 203,452 Adjustment - financial asset measured at amortized cost - 16,088 16,088 Cash inputs - RAP - (9,727) (9,727) Disposals (25,392) - (25,392) Business combination 876,281 - 876,281 As of December 31, 2016 5,193,511 180,333 5,373,844 Current - 10,700 10,700 Noncurrent 5,193,511 169,633 5,363,144 Additions 972,254 46,261 1,018,515 Adjustment of expected cash flow 212,294 - 212,294 Adjustment - financial asset measured at amortized cost - 27,807 27,807 Cash inputs - RAP - (15,677) (15,677) Disposals (35,039) - (35,039) Business combination (12,338) - (12,338) As of December 31, 2017 6,330,681 238,723 6,569,404 Current - 23,736 23,736 Noncurrent 6,330,681 214,987 6,545,668 The amount refers to the financial asset corresponding to the right established in the concession agreements of the energy distributors (measured at fair value) and transmitters (measured at amortized cost) to receive cash (i) by compensation upon the return of the assets to the granting authority at the end of the concession, and (ii) the transmitter's right to receive cash throughout the concession through allowed annual revenue ("RAP"). For energy distributors, according to the current tariff model, the remuneration for this asset is recognized in profit or loss upon billing to consumers and the realization occurs upon receipt of the electric energy bills. Moreover, the difference to adjust the balance to the expected cash flow receipts (new replacement value - “VNR” - note 4) is recognized as a balancing item to the operating income account (note 25) in the statement of profit or loss for the year. For the energy transmitters, the remuneration for this asset is recognized according to the internal rate of return, which takes into account the investment made and the allowed annual revenue (“RAP”) to be received during the remaining concession period and it takes into consideration the indemnity upon the reversal of assets to the granting authority. The adjustment of R$ 27,807 is recognized against other operating income (R$16,088 in 2016 and R$11,400 in 2015). The balances disclosed in the "Business Combinations" line refer to the complementary amounts related to the acquisition of RGE Sul, which final recognition occurred on September 30, 2017, according to note 14.3.

(11) OTHER ASSETS

(11) OTHER ASSETS	12 Months Ended
	Dec. 31, 2017
Other Assets [Abstract]
OTHER ASSETS	Current Noncurrent Dec 31, 2017 Dec 31, 2016 Dec 31, 2017 Dec 31, 2016 Advances - Fundação CESP 7,851 7,533 6,797 - Advances to suppliers 31,981 15,787 - - Pledges, funds and restricted deposits 159,291 106,925 621,489 533,719 Orders in progress 167,197 203,344 5,062 - Services rendered to third parties 8,530 9,385 - - Energy pre-purchase agreements - - 26,260 27,302 Collection agreements 661 1,273 - - Prepaid expenses 80,599 65,668 20,042 20,942 GSF Insurance Premium 19,629 12,722 17,359 28,935 Receivables - CDE 242,906 213,552 - - Advances to employees 19,658 15,940 - - Arrendamentos 15,684 19,281 45,290 50,541 Others 175,889 153,764 97,893 104,815 (-) Allowance for doubtful debts (note 6) (29,379) (27,992) - - Total 900,498 797,181 840,192 766,253 Pledges, funds and restricted deposits: Orders in progress: Energy pre-purchase agreements: GSF Insurance Premium: Receivables – CDE: In 2017 the subsidiaries matched the receivables relating to CDE to the payables relating to the Energy Development Account (CDE) (note 22) amounting to R$ 238,510, of which (i) R$ 95,978 based on a judicial injunction obtained in May 2015, and (ii) R$ 142,532 authorized by Order No. 1,576/2016.

(12) INVESTMENTS

(12) INVESTMENTS	12 Months Ended
	Dec. 31, 2017
Investments [Abstract]
INVESTMENTS	Dec 31, 2017 Dec 31, 2016 Permanent equity interests - equity method By equity method 990,910 1,482,533 Fair value of assets, net 10,640 11,219 Total 1,001,550 1,493,753 In the financial statements, the investment balances relate to interests in entities accounted for by the equity method: Share of equity Share of profit (loss) Joint ventures Dec 31, 2017 Dec 31, 2016 2017 2016 2015 Baesa 187,654 175,914 11,849 9,853 2,508 Enercan 176,998 562,701 85,808 117,112 74,677 Chapecoense 385,870 537,170 120,651 117,451 77,487 EPASA 240,388 206,749 94,663 67,577 63,348 Fair value adjustments of assets, net 10,640 11,219 (579) (579) (1,136) 1,001,550 1,493,753 312,390 311,414 216,885 12.1 - Dividends and Interest on capital At December 31, 2017 and 2016, the Company has the following amounts receivable from the joint ventures below, relating to dividends and interest on capital: Dividend Interest on own capital Total Investments Dec 31, 2017 Dec 31, 2016 Dec 31, 2017 Dec 31, 2016 Dec 31, 2017 Dec 31, 2016 Investco - - 2,118 2,926 2,118 2,926 Baesa 108 89 - - 108 89 Enercan 21,184 40,983 - - 21,184 40,983 Chapecoense 32,734 29,329 - - 32,734 29,329 Total 54,026 70,402 2,118 2,926 56,145 73,328 12.2 – Joint Ventures Summarized financial information on joint ventures at December 31, 2017 and 2016 and for the years ended December 31, 2017, 2016 and 2015 is as follows: December 31, 2017 Joint venture Enercan Baesa Chapecoense Epasa Current assets 182,843 124,361 329,721 319,222 Cash and cash equivalents 48,695 17,873 116,425 74,741 Noncurrent assets 1,101,291 1,030,904 2,745,989 531,527 Current liabilities 291,010 121,369 426,695 157,343 Borrowings and debentures 140,090 63,154 138,788 34,299 Other financial liabilities 4,085 17,113 67,897 993 Noncurrent liabilities 629,850 283,456 1,892,407 242,765 Borrowings and debentures 510,874 - 1,172,181 186,373 Other financial liabilities 25,115 265,250 716,986 - Equity 363,273 750,440 756,608 450,641 Net operating revenue 580,430 412,329 829,525 789,402 Operational costs and expenses (273,339) (265,955) (186,638) (518,352) Depreciation and amortization (52,773) (50,621) (126,811) (35,640) Interest income 32,849 4,906 24,639 6,102 Interest expense (31,135) (27,986) (183,237) (26,197) Income tax expense (88,229) (25,442) (123,307) (39,892) Profit (loss) for the year 176,113 47,385 236,570 177,458 Equity Interests and voting capital 48.72% 25.01% 51.00% 53.34% December 31, 2016 Joint venture Enercan Baesa Chapecoense Epasa Current assets 405,874 54,703 577,296 257,082 Cash and cash equivalents 288,956 18,946 280,083 85,709 Noncurrent assets 1,174,869 1,117,120 2,892,371 562,462 Current liabilities 196,760 116,192 391,402 172,401 Borrowings and debentures 87,560 87,032 137,753 35,555 Other financial liabilities 7,848 24,119 78,372 62,762 Noncurrent liabilities 229,085 352,142 2,024,989 259,559 Borrowings and debentures 153,020 63,196 1,292,239 218,891 Other financial liabilities 26,254 276,600 730,494 28,686 Equity 1,154,897 703,489 1,053,275 387,584 Net operating revenue 564,966 239,730 789,732 548,145 Operational costs and expenses (137,159) (76,985) (140,212) (328,093) Depreciation and amortization (53,888) (51,429) (126,770) (35,075) Interest income 31,602 9,115 35,113 10,329 Interest expense (36,275) (23,961) (125,192) (23,128) Income tax expense (121,223) (20,401) (106,683) (28,011) Profit (loss) for the year 240,363 39,405 212,294 126,665 Equity Interests and voting capital 48.72% 25.01% 51.00% 53.34% December 31, 2015 Joint venture Enercan Baesa Chapecoense Epasa Net operating revenue 523,055 427,561 729,511 949,246 Operational costs and expenses (196,480) (260,004) (149,219) (729,994) Depreciation and amortization (53,733) (55,342) (130,652) (32,413) Interest income 15,742 8,426 28,235 11,275 Interest expense (56,049) (22,555) (132,625) (29,778) Income tax expense (76,795) (5,165) (76,880) (32,869) Profit (loss) for the year 153,269 10,028 151,935 118,734 Equity Interests and voting capital (*) 48.72% 25.01% 51.00% 53.34% (*) Up to January, 2015, CPFL Geração's interest in Epasa was 53.84% At the Extraordinary General Meeting held on August 2, 2017, the shareholders of the joint venture ENERCAN approved a capital reduction by R$ 188,000 (R$ 91,599 proportional to the Company’s indirect interest), with capital decreasing to R$ 200,787 (R$ 388,787 as at December 31, 2016). At the Extraordinary General Meeting held on October 25, 2017, the shareholders of subsidiary CERAN approved a capital reduction by R$ 350,875, with fully subscribed and paid-in capital decreasing to R$ 120,000. Although holding more than 50% in EPASA and Chapecoense, CPFL Geração controls these investments jointly with other shareholders. The analysis of the classification of the type of investment is based on the Shareholders' Agreement of each joint venture. The borrowings from the BNDES obtained by the joint ventures BAESA and Chapecoense establish restrictions on the payment of dividends to subsidiary CPFL Geração above the mandatory minimum dividend of 25% without the prior consent of the BNDES. 12.3 – Joint operation Through its wholly-owned subsidiary CPFL Geração, the Company holds part of the assets of the Serra da Mesa hydropower plant, located on the Tocantins River, in Goiás State. The concession and operation of the hydropower plant belong to Furnas Centrais Elétricas S.A. In order to maintain these assets operating jointly with Furnas (joint operation), CPFL Geração was assured 51.54% of the installed power of 1,275 MW (657 MW) and the assured energy of mean 671 MW (mean 345.4 MW) until 2028 (information on energy capacity measures not audited by the independent auditors).

(13) PROPERTY, PLANT AND EQUIPM

(13) PROPERTY, PLANT AND EQUIPMENT	12 Months Ended
	Dec. 31, 2017
Property Plant And Equipment
PROPERTY, PLANT AND EQUIPMENT	Land Reservoirs, dams and water mains Buildings, construction and improvements Machinery and equipment Vehicles Furniture and fittings In progress Total At December 31, 2014 182,316 1,185,614 1,517,475 5,832,005 32,328 11,660 388,088 9,149,486 Historical cost 197,393 1,637,812 1,976,212 7,521,804 43,081 22,462 388,088 11,786,852 Accumulated depreciation (15,077) (452,199) (458,737) (1,689,799) (10,753) (10,802) - (2,637,366) Additions - - 168 512 - - 583,538 584,216 Disposals (1,354) (414) (4,093) (21,773) (558) (284) - (28,477) Transfers 2,338 140 61,615 217,462 10,436 578 (292,569) - Reclassification - cost (212) 328,101 (499,943) 172,169 22 (137) - - Transfers from/to other assets - cost (24) 2 (6,548) 6,598 (1) (186) 630 471 Depreciation (6,257) (68,562) (50,716) (370,076) (6,343) (1,926) - (503,881) Write-off of depreciation - 139 204 3,572 379 186 - 4,480 Reclassification - depreciation - (68,775) 68,711 151 - (88) - - Transfers from/to other assets - depreciation - - - 35 - - - 35 Impairment losses - - (10,891) (16,565) (32) (106) (5,519) (33,112) At December 31, 2015 176,807 1,376,246 1,075,982 5,824,089 36,230 9,696 674,166 9,173,217 Historical cost 198,141 1,965,641 1,516,228 7,878,838 52,947 22,323 674,166 12,308,285 Accumulated depreciation (21,334) (589,395) (440,246) (2,054,749) (16,717) (12,627) - (3,135,068) Additions - 171 - 236 - - 1,084,612 1,085,019 Disposals - - (421) (6,705) (1,249) (779) (26,696) (35,850) Transfers 8,325 95,799 177,902 1,160,915 22,467 456 (1,465,864) - Reclassification - cost (137) (1,434) (40,852) 52,205 12 (39) (1,219) 8,536 Transfers from/to other assets - cost - 3 - (5,025) (167) (452) (10,523) (16,164) Depreciation (7,632) (75,659) (54,035) (377,529) (8,888) (1,676) - (525,420) Write-off of depreciation (7) 1 62 4,694 480 254 - 5,484 Reclassification - depreciation (1,211) (967) (5,374) (1,002) 7 11 - (8,536) Transfers from/to other assets - depreciation - 3 (46) 1,374 150 91 - 1,572 Impairment losses - - - - - - (5,221) (5,221) Business combination - - - 2,140 27,175 - 1,049 30,364 At December 31, 2016 176,145 1,394,162 1,153,220 6,655,391 76,217 7,562 250,302 9,712,998 Historical cost 206,330 2,060,191 1,652,934 9,066,408 106,920 21,507 250,302 13,364,592 Accumulated depreciation (30,185) (666,028) (499,714) (2,411,017) (30,704) (13,945) - (3,651,594) Additions - - - 772 2,978 - 753,137 756,887 Disposals (22) (132) (140) (32,336) (2,248) (635) (8,332) (43,845) Transfers 2,950 400 154,737 574,944 20,434 1,484 (754,948) - Transfers from/to other assets - cost (1,893) 6,393 (154,880) 98,579 (126) (330) 11,033 (41,224) Depreciation (8,004) (79,276) (59,736) (431,393) (18,055) (1,332) - (597,795) Write-off of depreciation 2 124 120 9,529 1,379 387 - 11,540 Transfers from/to other assets - depreciation (683) (2,413) 1,930 9,690 (8) 108 - 8,624 Business Combination - - - - (4,800) - - (4,800) Impairment losses - - (474) (14,787) - - - (15,261) At December 31, 2017 168,494 1,319,257 1,094,777 6,870,389 75,771 7,245 251,192 9,787,125 Historical cost 207,365 2,066,850 1,652,178 9,693,512 122,540 22,026 251,192 14,015,662 Accumulated depreciation (38,870) (747,593) (557,400) (2,823,123) (46,769) (14,782) - (4,228,537) Average depreciation rate 2017 3.86% 3.93% 3.69% 4.53% 13.09% 8.31% Average depreciation rate 2016 3.86% 3.69% 3.30% 4.19% 14.31% 10.01% Average depreciation rate 2015 3.86% 3.66% 3.46% 4.62% 14.24% 10.49% The balance of construction in progress refers mainly to works in progress of the operating subsidiaries and/or those under development, especially for CPFL Renováveis’ projects, which has construction in progress of R$ 197,305 (R$182,181 at December 31, 2016). In accordance with IAS 23, the interest on borrowings taken by subsidiaries to finance the works is capitalized during the construction phase. During 2017, R$29,817 (R$ 54,733 in 2016 and R$ 34,212 in 2015) was capitalized in the financial statements at a rate of 8.80% p.a. (11.70% p.a. in 2016 and 11.16% p.a. in 2015). In the financial statements, depreciation expenses are recognized in the statement of profit or loss in line item “depreciation and amortization” (note 27). At December 31, 2017, the total amount of property, plant and equipment pledged as collateral for borrowings, as mentioned in note 16, is approximately R$ 3,903,380, mainly relating to the subsidiary CPFL Renováveis (R$ 3,841,016). The balances disclosed in the "Business Combinations" line refer to the complementary amounts related to the acquisition of RGE Sul, which final recognition occurred on September 30, 2017, according to note 14.3. 13.1 Impairment testing For all the reporting years the Company assesses whether there are indicators of impairment of its assets that would require an impairment test. The assessment was based on external and internal information sources, taking into account fluctuations in interest rates, changes in market conditions and other factors. In 2016, a provision of R$ 5,221 was recognized in subsidiary CPFL Telecom for the impairment of cash-generating units, for 2017 the recognition of an additional provision was not necessary. In 2017, due to the changes in the Brazilian political, economic and energy scenario, the subsidiary CPFL Renováveis recognized a loss of R$ 15,261 relating to property, plant and equipment of the Bio Baia Formosa and Solar Tanquinho projects. This loss was recognized in the statement of profit or loss in line item “Other operating expenses” (note 27). Such impairment was based on the assessment of the cash-generating units comprising fixed assets of subsidiaries which, separately, are not featured as an operating segment (note 29). Additionally, during 2017 and 2016 the Company did not change the form of aggregation of the assets for identification of these cash-generating units. Fair value was measured by using the cost approach, a valuation technique that reflects the amount that would be required at present to replace the service capacity of an asset (normally referred to as the cost of substitution or replacement).

(14) INTANGIBLE ASSETS

(14) INTANGIBLE ASSETS	12 Months Ended
	Dec. 31, 2017
Intangible Assets
INTANGIBLE ASSETS	Concession right Goodwill Acquired in business combinations Distribution infrastructure - operational Distribution infrastructure - in progress Public utilities Other intangible assets Total As of December 31, 2014 6,115 4,658,210 3,734,606 414,574 30,162 86,503 8,930,171 Historical cost 6,152 7,441,935 9,526,355 414,574 35,840 195,577 17,620,433 Accumulated Amortization (37) (2,783,725) (5,791,748) - (5,678) (109,074) (8,690,262) Additions - - - 879,851 - 9,298 889,149 Amortization - (302,665) (460,774) - (1,419) (12,604) (777,462) Transfer - intangible assets - - 512,912 (512,912) - - - Transfer - financial asset - - 387 (330,449) - - (330,062) Transfers from concession financial asset - extended concessions - - 488,635 48,563 - - 537,198 Disposal and transfer - other assets - - (26,584) - - (6,228) (32,813) Impairment losses - - - - - (5,844) (5,844) As of December 31, 2015 6,115 4,355,546 4,249,182 499,627 28,743 71,125 9,210,338 Historical cost 6,152 7,441,902 10,348,857 499,627 35,840 192,626 18,525,004 Accumulated Amortization (37) (3,086,356) (6,099,675) - (7,097) (121,500) (9,314,665) Additions - - - 1,213,924 - 10,507 1,224,431 Amortization - (255,110) (498,891) - (1,419) (12,438) (767,858) Transfer - intangible assets - - 610,032 (610,032) - - - Transfer - financial asset - - 9,452 (664,908) - - (655,456) Disposal and transfer - other assets - (7,283) (48,346) - - (7,410) (63,040) Business combination - 413,796 1,229,074 227,398 - - 1,870,268 Impairment losses - (40,433) - - - (2,637) (43,070) As of December 31, 2016 6,115 4,466,516 5,550,502 666,008 27,324 59,147 10,775,613 Historical cost 6,152 7,602,941 11,987,109 666,008 35,840 183,138 20,481,188 Accumulated Amortization (37) (3,136,425) (6,436,607) - (8,516) (123,990) (9,705,576) Additions - - - 1,898,434 - 9,344 1,907,778 Amortization - (286,215) (639,292) - (1,419) (9,390) (936,318) Transfer - intangible assets - - 814,643 (814,643) - - - Transfer - financial asset - - 131 (972,385) - - (972,254) Disposal and transfer - other assets - (16,244) (91,214) 48,061 - 1,723 (57,674) Corporate restructuring - note 14.4.1 - (26,766) (73,215) - - - (99,981) Impairment losses - (5,129) - - - (47) (5,176) Business combination - (15,057) (7,108) - - - (22,165) As of December 31, 2017 6,115 4,117,105 5,554,447 825,476 25,904 60,777 10,589,824 Historical cost 6,152 7,558,645 11,442,528 825,476 35,840 174,407 20,043,048 Accumulated Amortization (37) (3,441,540) (5,888,080) - (9,936) (113,630) (9,453,223) The amortization of intangible assets is recognized in the statement of profit or loss in the following line items: (i) “depreciation and amortization” for amortization of distribution infrastructure intangible assets, use of public asset and other intangible assets; and (ii) “amortization of concession intangible asset” for amortization of the intangible asset acquired in business combination (note 27). In accordance with IAS 23, the interest on borrowings taken by subsidiaries is capitalized for qualifying intangible assets. In the financial statements, in 2017 R$20,726 was capitalized (R$ 13,349 in 2016 and R$ 11,358 in 2015) at a rate of 8.17% p.a. (7.74% p.a. in 2016 and 7.53% p.a. in 2015). The balances disclosed in the "Business Combinations" line refer to the complementary amounts related to the acquisition of RGE Sul, which final recognition occurred on September 30, 2017, according to note 14.3. 14.1 Intangible asset acquired in business combinations The breakdown of the intangible asset related to the right to operate the concessions acquired in business combinations is as follows: Dec 31, 2017 Dec 31, 2016 Annual amortization rate Historical cost Accumulated amortization Net value Net value 2017 2016 2015 Intangible asset - acquired in business combinations Intangible asset acquired, not merged Parent company CPFL Paulista 304,861 (207,003) 97,858 107,843 3.28% 3.28% 4.78% CPFL Piratininga 39,065 (25,040) 14,025 15,319 3.31% 3.31% 4.50% RGE 3,150 (1,827) 1,323 1,457 4.25% 4.24% 5.51% CPFL Geração 54,555 (35,488) 19,067 20,912 3.38% 3.38% 5.04% CPFL Jaguari Geração 7,896 (3,852) 4,044 4,314 3.42% 3.41% 6.36% 409,527 (273,210) 136,317 149,845 Subsidiaries CPFL Renováveis 3,717,093 (898,762) 2,818,331 2,995,028 4.75% 5.39% 4.35% RGE Sul (CPFL Jaguariúna) - - - 99,524 - 9.09% - RGE 618 (189) 429 473 7.12% 9.41% 9.41% 3,717,711 (898,951) 2,818,760 3,095,025 Subtotal 4,127,238 (1,172,161) 2,955,077 3,244,869 Intangible asset acquired and merged Subsidiaries RGE 1,120,266 (885,969) 234,297 257,924 2.11% 2.11% 1.79% RGE Sul 312,741 (33,188) 279,553 307,982 9.09% 9.09% - CPFL Geração 426,450 (323,463) 102,987 112,953 2.34% 2.34% 3.80% Subtotal 1,859,457 (1,242,620) 616,837 678,859 Intangible asset acquired and merged – Reassessed Parent company CPFL Paulista 1,074,026 (754,666) 319,360 351,565 3.00% 3.00% 4.34% CPFL Piratininga 115,762 (74,202) 41,560 45,395 3.31% 3.31% 4.50% RGE 310,128 (184,343) 125,785 138,469 4.09% 4.09% 5.32% CPFL Jaguari Geração 15,275 (8,377) 6,898 7,358 3.01% 3.01% 5.61% Subtotal 1,515,191 (1,021,588) 493,603 542,787 Subsidiaries RGE Sul 56,759 (5,171) 51,588 - 9.09% - - Total 7,558,645 (3,441,540) 4,117,105 4,466,516 The intangible asset acquired in business combinations is associated to the right to operate the concessions and comprises: - Intangible asset acquired, not merged Refers basically to the intangible asset from acquisition of the shares held by noncontrolling interests prior to adoption of IFRS 3. - Intangible asset acquired and merged Refers to the intangible asset from the acquisition of subsidiaries that were merged into the respective equity, without application of CVM Instructions No. 319/99 and No. 349/01, that is, without segregation of the amount of the tax benefit. - Intangible asset acquired and merged – Reassessed In order to comply with ANEEL requirements and avoid the amortization of the intangible asset resulting from the merger of parent company causing a negative impact on dividends paid to noncontrolling interests, the subsidiaries applied the concepts of CVM Instructions No. 319/99 and No. 349/01 to the intangible asset. A reserve was therefore recognized to adjust the intangible, against a special intangible reserve on the merger of equity in each subsidiary, so that the effect of the transaction on the equity reflects the tax benefit of the merged intangible asset. These changes affected the Company's investment in subsidiaries, and in order to adjust this, a non-deductible intangible asset was recognized for tax purposes. Effective January 1, 2016, in compliance with the amendments to IAS 16 and IAS 38, the Group started to adopt prospectively, for all cases, the straight-line method of amortization over the remaining concession period. 14.2 Impairment test For all the reporting years, the Company assesses whether there are indicators of impairment of its assets that would require an impairment test. The assessment was based on external and internal information sources, taking into account fluctuations in interest rates, changes in market conditions and other factors. In 2016, a provision of R$ 2,637 was recognized in subsidiary CPFL Telecom for the impairment of cash-generating units, in the statement of profit or loss in line item “Other operating expenses” (note 27). In 2017, the subsidiary CPFL Renováveis recognized a loss of R$ 5,176 (R$ 40,433 in 2016), relating to intangible assets acquired in the business combination of the Pedra Cheirosa I and Bio Formosa projects. Such provisions for impairment were based on the assessment of these cash-generating units formed by the intangible assets of those subsidiaries, which, separately, do not feature an operating segment (note 29). Additionally, during 2017 and 2016 the Company did not change the form of aggregation of the assets for identification of these cash-generating units. For fair value measurement the cost approach was used, this is a valuation technique that reflects the amount that would be currently required to replace the service capacity of an asset (normally referred to as cost of substitution or replacement). The recognition of the provision for impairment of assets was due to the unfavorable scenario for the businesses of these subsidiaries and was calculated based on their fair values less cost to sell. 14.3 Business combination – Acquisition of AES Sul On June 16, 2016, the Company disclosed in a Significant Event Notice that it had entered into an agreement to acquire through its wholly-owned subsidiary CPFL Jaguariúna Participações Ltda., 100% of the shares of AES Sul Distribuidora Gaúcha de Energia S.A. (“AES Sul”), currently RGE Sul, until then held by AES Guaíba II Empreendimentos Ltda. (the “seller”), indirect wholly-owned subsidiary of The AES Corporation. On August 5, 2016, the transaction was approved by CADE (Brazilian antitrust agency) and, on September 9, 2016, it was authorized by ANEEL. The acquisition was completed on October 31, 2016 (“acquisition date”), after all the conditions precedent of the transaction were met. October 31, 2016 was the date in which the control of RGE Sul was taken over by CPFL Jaguariúna. This acquisition resulted in a business combination in accordance with IFRS 3 (R) – “Business Combination” since CPFL Jaguariúna started to control RGE Sul. The consideration initially transferred was R$ 1,698,455, paid in cash, in a lump sum, on the acquisition date. This consideration was subsequently adjusted for changes in working capital and net debt of RGE Sul, occurred in the period between December 31, 2015 and the acquisition date. The final value of the consideration, considering the price adjustment, was R$1,591,839. RGE Sul is a publicly-held corporation engaged in providing public services of electricity distribution in any forms, and these activities are regulated by the National Agency of Electric Energy (“ANEEL”), linked to the Ministry of Mines and Energy. Additionally, RGE Sul is authorized to participate in programs that aim at other forms of energy, technology and services, including exploration of activities derived directly or indirectly from the use of assets, rights and technologies owned by it. Its administrative headquarters are located at Avenida São Borja, 2.801 – Bairro Fazenda São BorjaSão Leopoldo, State of Rio Grande do Sul. RGE Sul holds the concession for operation of its activities for a period of thirty years, up to November 5, 2027, its concession area comprises 118 municipalities of the State of Rio Grande do Sul, located between the metropolitan region of Porto Alegre and the borders with Uruguay and Argentina, serving approximately 1.3 million consumers. The acquisition of RGE Sul is in line with the Company’s growth strategy, especially in the Distribution segment, with potential gains of scale for its operations. The Company also expects to obtain important synergies relating to the concession area of RGE Sul since another important distributor of the Group (RGE) holds concession in the state of Rio Grande do Sul. Additional information to the acquisition (acquisition of RGE Sul) a) Consideration RGE Sul Consideration paid, net Consideration directly transferred to prior shareholders 1,698,455 Reimbursements due to adjustments related to agreement clauses (106,616) 1,591,839 b) Assets acquired and liabilities assumed on the acquisition date The total amount paid on the transaction was allocated on the acquisition date to the assets acquired and liabilities assumed at fair values, including the intangible assets related to the concession exploration right. Consequently, as the entire amount paid was allocated to identified assets and liabilities, no residual value was allocated as goodwill on this transaction. The allocation of the amount paid for assets and liabilities acquired was made with amounts provisionally calculated for the financial statements as at December 31, 2016, based on analyses conducted by Management itself at the time such financial statements were prepared. The final fair values presented were pending confirmation until the completion of the economic and financial appraisal report prepared by independent appraiser, completed on October 30, 2017. As a consequence, during the measurement period, certain reclassifications were made to the amounts provisionally recorded in the financial statements as at December 31, 2016, relating to the (i) decrease in the fair value of the concession infrastructure’s intangible asset; (ii) completion of the fair value allocation and review of estimates based on acquirer management assumptions on the provision for tax, civil and labor risks; (iii) increase in the amount of trade receivables; (iv) decrease in the concession’s financial asset; (v) decrease in the intangible asset relating to the operation right, as a consequence of the revision of the assumptions used to determine the value of tangible and intangible assets; and (vi) recording of deferred income tax and social contribution balances on certain adjustments. These reclassifications are within the measurement period, pursuant to IFRS 3, and were considered immaterial for purposes of retrospectively adjust the provisional amounts recognized at the acquisition data. The allocation of the price paid at the fair value of the assets and liabilities acquired is as follows: October 31, 2016 October 31, 2016 Consolidated Consolidated (provisional) final Current assets Cash and cash equivalents 95,164 95,164 Consumers, concessionaries and licensees 580,945 580,945 Other current assets 89,548 89,548 Noncurrent assets Consumers, concessionaries and licensees 54,111 79,501 Deferred tax assets 204,176 310,741 Concession financial asset 876,281 863,943 Intangible assets - Distribution infrastructure 1,456,472 1,444,401 Intangible acquired in this business combination 413,796 398,739 Other noncurrent assets 147,784 155,508 Current liabilities Trade payables (479,031) (479,031) Debentures and borrowings (24,672) (24,672) Taxes, fees and contributions (65,198) (65,198) Sector financial asset (29,246) (29,246) Regulatory charges (60,787) (60,787) Other current liabilities (114,552) (114,552) Noncurrent liabilities Debentures and borrowings (1,131,949) (1,131,949) Sector financial asset (64,935) (64,939) Provision for tax, civil and labor risks (223,383) (323,595) Other noncurrent liabilities (132,686) (132,682) Net assets acquired 1,591,839 1,591,839 Goodwill arising on acquisition Consideration paid, net 1,591,839 1,591,839 (-) Fair value of assets acquired and liabilities assumed 1,591,839 1,591,839 Goodwill - - The fair values presented above were finalized are in accordance with the economic and financial appraisal report prepared by the independent expert. The fair values of the concession financial asset and distribution infrastructure intangible assets was determined based on the expert appraisal, considering the same assumptions adopted when preparing the report for Periodic Tariff Review purposes. c) Contingent consideration The share purchase agreement does not contain any clauses related to the contingent consideration to be paid to the seller. d) Indemnification assets The agreement for purchase of 100% of the shares of RGE Sul establishes that CPFL Jaguariúna can be indemnified, up to the limit of 15% of the total amount paid, if in the future it suffers any loss , conditioned to the compliance with specific clauses derived from matters originated in the seller or in any of its subsidiaries established in the share purchase agreement. There are also specific clauses for two lawsuits (regulatory and environmental) in which the seller undertakes to indemnify fully CPFL Jaguariúna in case of cash outflows related to the lawsuits, and CPFL Jaguariúna undertakes to pass on to the seller any cash flows related to these lawsuits that come to be received in the future in order to neutralize any effect on these two specific matters. The final fair value of the indemnification asset is R$ 41,974, relating to the environmental lawsuit (see item “e” below). This indemnification asset was recognized at the same amount of the fair value attributed to this provision recognized. Based on management assessment, no indemnification asset was recognized for the regulatory lawsuit for which there is a specific indemnification clause since no contingent liability related to this lawsuit was recognized on the acquisition date. e) Contingent liabilities recognized We present below the final contingent liabilities recognized in the amount of R$ 150,065: RGE Sul October 31, 2016 Labor lawsuits (i) 11,429 Civil lawsuits (i) 83,575 Regulatory lawsuits (i) 5,850 Environmental lawsuits (ii) 41,974 Tax lawsuits (i) 7,236 150,065 Provisions recognized in the subsidiary 173,530 Provisions for tax, civil and labor risks 323,595 i. These amounts represent the fair values of the labor, civil, regulatory and tax lawsuits for which the likelihood of loss attributed on the acquisition date is “possible” or “remote”. Considering that the settlement of these lawsuits depends on third parties, either at the judicial or administrative level, it is not possible to estimate a schedule for the occurrence of any cash outflows associated with these contingent liabilities. No indemnification asset was recognized for these contingent liabilities. ii. Refers to the fair value attributed to a class action lawsuit for which the likelihood of loss attributed by Management, together with its legal counsel, is “possible” on the acquisition date. This class action lawsuit seeks compensation for environmental damages occurred in a woodworking and pole manufacture unit that was operated, between 1997 and 2005, by RGE Sul together with its associate at that time AES Florestal. Until 1997, this unit was operated by the former concessionaire, Companhia Estadual de Energia Elétrica (CEEE). Indemnification asset in the same amount was recognized on the acquisition date. f) Receivables acquired The gross contractual amount of the receivables is R$ 703,672 and, based on independent expert, which has been confirmed by management´s assessment, R$43,226 are not expected to be received and represent, therefore, the portion that is expected to represent an impairment. Therefore, the fair value of the receivables acquired is R$ 660,446. g) Net cash outflow on the acquisition Consideration paid, net 1,591,839 (-) Cash and cash equivalents balance acquired (95,164) Cash paid in the acquisition, net 1,496,675 h) Additional financial information i. Net Operating Revenue and loss of the subsidiary acquired included in the consolidated financial statements in 2017: Considering that the acquisition date was October 31, 2016, the consolidated financial statement as at December 31, 2017 comprises fully the revenue and the result of RGE Sul for the period. The Company’s consolidated financial statements for the year ended December 31, 2016 the operations of RGE Sul for the last two months of the year were consolidated by the Company: 2016 Net Operating Revenue Losses RGE Sul (November 1 to December 31, 2016) 522,677 (27,687) ii. Combined financial information on the Net Operating Revenue and Profit for 2016, if the acquisition had occurred on January 1, 2016. Net operating revenue Net profit (loss) January to December, 2016 January to December, 2016 CPFL Energia Consolidated 19,112,089 879,057 Results for the period when the entity was not consolidated by CPFL(*) 2,365,090 (403,839) 21,477,179 475,218 (*) Results for the period when the entity was not consolidated (The pro forma adjustments) in the net operating revenue consider the addition of the subsidiary’s net operating revenue for the period in which it was not a subsidiary and, consequently, was not consolidated by the Company. The pro forma adjustments to profit for the period consider: (i) addition of the subsidiary’s result for the period in which it was not consolidated by the Company; (ii) inclusion of the amortization of the intangible asset acquired on the business combination and the amortization and disposal of the fair value of the distribution infrastructure’s intangible asset, had the acquisition occurred on January 1, 2016. 14.4 Corporate restructurings 14.4.1 Merger of CPFL Jaguariúna At the Extraordinary General Meeting “EGM” held on December 15, 2017, approval was given for the merger of CPFL Jaguariúna into RGE Sul. Accordingly, the merged company was wound up and RGE Sul became the successor to its assets, rights and obligations. At the time of the merger, the concepts of CVM Instructions No. 319/99 and No. 349/01 were applied, which resulted in the recognition on the consolidated financial statements of an intangible asset rectifying account, generating a tax credit of R$ 99,981 (note 9). To reassess its investments on the individual financial information of each entity with interests on RGE Sul, the CPFL Energia and CPFL Brasil recognized, proportionally to its investments in RGE Sul, (i) a reassessed concession intangible asset of R$ 148,487 and R$ 45,594 respectively, totaling R$ 194,081, corresponding to the fair value adjustment (value added) of the intangible assets relating to the distribution infrastructure and the right to operate the concession; and (ii) a net adjustment corresponding to the surplus value and decrease in value in the amounts of R$ 66,607 and R$ 20,452, respectively, corresponding to the fair value of the provision for tax, civil and labor risks, decrease in value of consumers, and surplus value of indemnification asset. Both amounts are non-deductible for tax purposes for the Company and for CPFL Brasil. 14.4.2 Grouping of subsidiaries Companhia Luz e Força Santa Cruz, Companhia Leste Paulista de Energia, Companhia Jaguari de Energia, Companhia Sul Paulista de Energia and Companhia Luz and Força de Mococa On November 21, 2017, ANEEL through Resolution No. 6,723/2017 authorized the grouping of the power distribution companies Companhia Luz e Força Santa Cruz, Companhia Leste Paulista de Energia, Companhia Sul Paulista de Energia, Companhia Luz e Força de Mococa and Companhia Jaguari de Energia, pursuant to Normative Resolution No. 716/2016 of May 3, 2016. Effective as of January 1, 2018, the operations of these subsidiaries are controlled only by Companhia Jaguari de Energia, which adopted the trade name “CPFL Santa Cruz”. This operation was approved by the EGM held on December 31, 2017 at the grouped companies. This grouping caused no effect in the consolidated financial statements".

(15) TRADE PAYABLES

(15) TRADE PAYABLES	12 Months Ended
	Dec. 31, 2017
Trade Payables
TRADE PAYABLES	Dec 31, 2017 Dec 31, 2016 Current System service charges 413 59,935 Energy purchased 2,248,748 1,868,950 Electricity network usage charges 252,170 121,884 Materials and services 650,538 545,468 Energy from the Free Market 145,002 131,893 Total 3,296,870 2,728,130 Noncurrent Energy purchased 128,438 129,148 Materials and services - 633 Total 128,438 129,781 The amounts of energy purchased recorded in noncurrent refer to the transaction made by the subsidiary RGE Sul in the period from September 1, 2000 to December 31, 2002, relating to the electricity purchase and sale transactions made on the Electric Energy Commercialization Chamber (CCEE) and adjusted, in 2002 and 2003, based on information and calculations prepared and disclosed by CCEE, the payment of which is suspended due to the judicial injunction obtained by the indirect subsidiary until the judgment of the lawsuit (notes 6 and 22).

(16) DEBTS AND BORROWINGS

(16) DEBTS AND BORROWINGS	12 Months Ended
	Dec. 31, 2017
Debts And Borrowings
DEBTS AND BORROWINGS	December 31, 2016 Borrowings raised Repayments of principal Interests, restatements and mark to market Exchange rate variations Interests paid December 31, 2017 Current Noncurrent Current Noncurrent Interests Principal Interests Principal Total Interests Principal Principal Total Measured at cost Local currency Investment 17,827 842,015 - 4,606,227 5,466,069 169,650 (1,151,289) 440,526 - (379,542) 15,564 647,250 3,882,601 4,545,415 Rental assets 38 1,034 - 3,955 5,028 - (1,038) 377 - (373) 13 1,180 2,800 3,993 Financial Institutions 89,387 255,355 144,709 1,517,251 2,006,702 185,752 (515,824) 207,812 - (343,163) 79,015 472,928 989,335 1,541,278 Others 50 59,756 - 42,370 102,176 27,209 (58,490) 5,638 - (1,793) 32 46,125 28,584 74,741 Total at cost 107,303 1,158,159 144,709 6,169,803 7,579,974 382,611 (1,726,640) 654,353 - (724,871) 94,624 1,167,484 4,903,320 6,165,427 Measured at fair value Foreign currency Financial Institutions 22,062 595,101 - 4,922,463 5,539,626 569,260 (1,315,172) 138,568 124,311 (139,596) 21,034 2,322,261 2,573,703 4,916,997 Mark to market - (1,764) - (35,651) (37,415) - - (21,137) - - - (11,375) (47,177) (58,552) Total at fair value 22,062 593,337 - 4,886,812 5,502,211 569,260 (1,315,172) 117,431 124,311 (139,596) 21,034 2,310,885 2,526,526 4,858,445 Borrowing costs - (5,213) - (32,930) (38,143) (6,415) - 12,742 - - - (4,420) (27,396) (31,816) Total 129,364 1,746,284 144,709 11,023,685 13,044,041 945,456 (3,041,812) 784,526 124,311 (864,467) 115,658 3,473,949 7,402,450 10,992,057 Measured at amortized cost Dec 31, 2017 Dec 31, 2016 Annual interest Amortization Collateral ESGDIV SENSI Taxa Local currency Investment CPFL Paulista FINEM V 2,883 37,078 TJLP + 2.12% to 3.3% (c) 72 monthly installments from February 2012 SGBP and CPFL Energia guarantee and receivables TJLP TJLP TJLP TRUE FINEM V 1,892 3,638 Fixed rate 8% (c) 90 monthly installments from August 2011 SGBP and CPFL Energia guarantee and receivables Others FIX fix TRUE FINEM V 23,283 30,835 Fixed rate 5.5% (b) 96 monthly installments from February 2013 SGBP and CPFL Energia guarantee and receivables Others FIX fix TRUE FINEM VI 101,068 149,984 TJLP + 2.06% to 3.08% (e) (f) 72 monthly installments from January 2014 SGBP and CPFL Energia guarantee and receivables TJLP TJLP TJLP TRUE FINEM VI 7,401 8,907 Fixed rate 2.5% (a) 114 monthly installments from June 2013 SGBP and CPFL Energia guarantee and receivables Others FIX fix TRUE FINEM VI 135,787 163,404 Fixed rate 2.5% (a) 96 monthly installments from December 2014 SGBP and CPFL Energia guarantee and receivables Others FIX fix TRUE FINEM VII 29,612 57,798 Fixed rate 6% (b) 96 monthly installments from April 2016 SGBP and CPFL Energia guarantee and receivables Others FIX fix TRUE FINEM VII 32,687 73,435 SELIC + 2.62% to 2.66% (h) 72 monthly installments from April 2016 SGBP and CPFL Energia guarantee and receivables cdi SELIC SELIC TRUE FINEM VII 54,259 132,622 TJLP + 2.12% to 2.66% (c) (d) 72 monthly installments from April 2016 SGBP and CPFL Energia guarantee and receivables TJLP TJLP TJLP TRUE FINAME 16,904 25,356 Fixed rate 4.5% 96 monthly installments from January 2012 CPFL Energia guarantee Others FIX fix TRUE CPFL Piratininga TRUE FINEM IV 1,553 19,970 TJLP + 2.12% to 3.3% (c) 72 monthly installments from February 2012 SGBP and CPFL Energia guarantee and receivables TJLP TJLP TJLP TRUE FINEM IV 610 1,173 Fixed rate 8% (c) 90 monthly installments from August 2011 SGBP and CPFL Energia guarantee and receivables Others FIX fix TRUE FINEM IV 12,108 16,035 Fixed rate 5.5% (b) 96 monthly installments from February 2013 SGBP and CPFL Energia guarantee and receivables Others FIX fix TRUE FINEM V 29,540 43,836 TJLP + 2.06% to 3.08% (e) (f) 72 monthly installments from January 2014 SGBP and CPFL Energia guarantee and receivables TJLP TJLP TJLP TRUE FINEM V 1,944 2,339 Fixed rate 2.5% (a) 114 monthly installments from June 2013 SGBP and CPFL Energia guarantee and receivables Others FIX fix TRUE FINEM V 33,791 40,664 Fixed rate 2.5% (a) 96 monthly installments from December 2014 SGBP and CPFL Energia guarantee and receivables Others FIX fix TRUE FINEM VI 37,052 41,620 SELIC + 2.62% to 2.66% (h) 72 monthly installments from April 2016 SGBP and CPFL Energia guarantee and receivables cdi SELIC SELIC TRUE FINEM VI 53,823 65,778 TJLP + 2.12% to 2.66% (c) (d) 72 monthly installments from April 2016 SGBP and CPFL Energia guarantee and receivables TJLP TJLP TJLP TRUE FINEM VI 24,308 28,198 Fixed rate 6% (b) 96 monthly installments from April 2016 SGBP and CPFL Energia guarantee and receivables Others FIX fix TRUE FINAME 8,016 12,023 Fixed rate 4.5% 96 monthly installments from January 2012 CPFL Energia guarantee Others FIX fix TRUE RGE SUL TRUE FINEP 4,481 7,757 TJLP 73 monthly installments from May 2016 Bank guarantee TJLP TJLP TJLP TRUE FINEP 5,487 7,562 Fixed rate 5% 81 monthly installments from September 2013 Bank guarantee Others FIX fix TRUE RGE TRUE FINEM V 1,745 22,444 TJLP + 2.12% to 3.3% (c) 72 monthly installments from February 2012 SGBP and CPFL Energia guarantee and receivables TJLP TJLP TJLP TRUE FINEM V 8,932 11,828 Fixed rate 5.5% (b) 96 monthly installments from February 2013 SGBP and CPFL Energia guarantee and receivables Others FIX fix TRUE FINEM VI 53,994 80,126 TJLP + 2.06% to 3.08% (e) (f) 72 monthly installments from January 2014 SGBP and CPFL Energia guarantee and receivables TJLP TJLP TJLP TRUE FINEM VI 783 942 Fixed rate 2.5% (a) 114 monthly installments from June 2013 SGBP and CPFL Energia guarantee and receivables Others FIX fix TRUE FINEM VI 49,930 60,085 Fixed rate 2.5% (a) 96 monthly installments from December 2014 SGBP and CPFL Energia guarantee and receivables Others FIX fix TRUE FINEM VII 34,001 39,442 Fixed rate 6% (b) 96 monthly installments from April 2016 SGBP and CPFL Energia guarantee and receivables Others FIX fix TRUE FINEM VII 58,097 65,261 SELIC + 2.62% to 2.66% (h) 72 monthly installments from April 2016 SGBP and CPFL Energia guarantee and receivables cdi SELIC SELIC TRUE FINEM VII 66,601 81,394 TJLP + 2.12% to 2.66% (d) 72 monthly installments from April 2016 SGBP and CPFL Energia guarantee and receivables TJLP TJLP TJLP TRUE FINAME 4,022 6,033 Fixed rate 4.5% 96 monthly installments from January 2012 CPFL Energia guarantee Others FIX fix TRUE FINAME 109 168 Fixed rate 10.0% 90 monthly installments from May 2012 Liens on assets Others FIX fix TRUE FINAME 443 579 Fixed rate 10.0% 66 monthly installments from October 2015 Liens on assets Others FIX fix TRUE Companhia Luz e Força Santa Cruz TRUE FINEM — 9,094 Fixed rate 6% 111 monthly installments from April 2015 CPFL Energia guarantee Others FIX fix TRUE FINEM — 3,381 SELIC + 2.19% 72 monthly installments from April 2015 CPFL Energia guarantee cdi SELIC SELIC TRUE FINEM — 6,062 TJLP + 2.19% 72 monthly installments from April 2015 CPFL Energia guarantee TJLP TJLP TJLP TRUE CPFL Leste Paulista TRUE FINEM — 3,397 Fixed rate 6% 111 monthly installments from April 2015 CPFL Energia guarantee Others FIX fix TRUE FINEM — 1,239 SELIC + 2.19% 72 monthly installments from April 2015 CPFL Energia guarantee cdi SELIC SELIC TRUE FINEM — 2,224 TJLP + 2.19% 72 monthly installments from April 2015 CPFL Energia guarantee TJLP TJLP TJLP TRUE CPFL Sul Paulista TRUE FINEM — 2,412 Fixed rate 6% 111 monthly installments from April 2015 CPFL Energia guarantee Others FIX fix TRUE FINEM — 1,731 SELIC + 2.19% 72 monthly installments from April 2015 CPFL Energia guarantee cdi SELIC SELIC TRUE FINEM — 3,122 TJLP + 2.19% 72 monthly installments from April 2015 CPFL Energia guarantee TJLP TJLP TJLP TRUE Companhia Jaguari de Energia (CPFL Santa Cruz) TRUE Santander - Bank credit note 3,514 — TJLP + 2.99% (f) 96 monthly installments from October 2015 CPFL Energia guarantee TJLP TJLP TJLP TRUE Santander - Bank credit note 1,215 — UMBNDES +1.99% 96 monthly installments from October 2015 CPFL Energia guarantee Others USD usd TRUE Santander - Bank credit note 2,759 1,464 TJLP + 3.1% 96 monthly installments from June 2014 CPFL Energia guarantee TJLP TJLP TJLP TRUE Santander - Bank credit note 1,077 572 UMBNDES + 2.1% 96 monthly installments from June 2014 CPFL Energia guarantee Others USD usd TRUE FINEM 15,016 2,422 Fixed rate 6% 111 monthly installments from April 2015 CPFL Energia guarantee Others FIX fix TRUE FINEM 6,424 1,287 SELIC + 2.19% 72 monthly installments from April 2015 CPFL Energia guarantee cdi SELIC SELIC TRUE FINEM 12 — Selic + 3.63% 36 monthly installments from December 2018 CPFL Energia guarantee cdi SELIC SELIC TRUE FINEM 10,612 2,321 TJLP + 2.19% 72 monthly installments from April 2015 CPFL Energia guarantee TJLP TJLP TJLP TRUE FINEM 6,204 — TJLP + 3.29% 36 monthly installments from December 2018 CPFL Energia guarantee TJLP TJLP TJLP TRUE FINEM 206 — TJLP + 3.39% 96 monthly installments from May 2019 CPFL Energia guarantee TJLP TJLP TJLP TRUE CPFL Mococa TRUE Santander - Bank credit note — 1,883 TJLP + 3.1% 96 monthly installments from June 2014 CPFL Energia guarantee TJLP TJLP TJLP TRUE Santander - Bank credit note — 736 UMBNDES + 2.1% 96 monthly installments from June 2014 CPFL Energia guarantee Others USD usd TRUE Santander - Bank credit note — 1,413 UMBNDES +1.99% 96 monthly installments from October 2015 CPFL Energia guarantee Others USD usd TRUE Santander - Bank credit note — 4,081 TJLP + 2.99% (f) 96 monthly installments from October 2015 CPFL Energia guarantee TJLP TJLP TJLP TRUE CPFL Serviços TRUE FINAME 1,086 1,297 Fixed rate 2.5% to 5.5% 96 monthly installments from August 2014 CPFL Energia guarantee and liens on equipment Others FIX fix TRUE FINAME 253 313 Fixed rate 6% 72 monthly installments from April 2016 CPFL Energia guarantee and liens on equipment Others FIX fix TRUE FINAME 472 668 Fixed rate 7.7% to 10% 90 monthly installments from December 2012 CPFL Energia guarantee and liens on equipment Others FIX fix TRUE FINAME 9,534 11,292 Fixed rate 2.5% to 5.5% 114 monthly installments from February 2013 CPFL Energia guarantee and liens on equipment Others FIX fix TRUE FINAME 33 47 TJLP + 4.2% 90 monthly installments from November 2012 CPFL Energia guarantee and liens on equipment TJLP TJLP TJLP TRUE FINAME 1,839 2,249 Fixed rate 6% 90 monthly installments from October 2014 CPFL Energia guarantee and liens on equipment Others FIX fix TRUE FINAME 88 101 Fixed rate 6% 96 monthly installments from July 2016 CPFL Energia guarantee and liens on equipment Others FIX fix TRUE FINAME 5,039 5,768 Fixed rate 6% 114 monthly installments from June 2015 CPFL Energia guarantee and liens on equipment Others FIX fix TRUE FINAME 514 762 TJLP + 2.2% to 3.2% (c) 56 monthly installments from July 2015 CPFL Energia guarantee and liens on equipment TJLP TJLP TJLP TRUE FINAME 3,060 3,870 Fixed rate 9.5% to 10% (c) 66 monthly installments from October 2015 CPFL Energia guarantee and liens on equipment Others FIX fix TRUE FINAME 1,276 1,589 Fixed rate 6% to 10% (e) 66 monthly installments from August 2016 CPFL Energia guarantee and liens on equipment Others FIX fix TRUE FINAME 5,216 5,832 TJLP + 3.50% (e) 48 monthly installments from June 2017 CPFL Energia guarantee and liens on equipment TJLP TJLP TJLP TRUE FINAME 1,201 2,511 SELIC + 3.90% 48 monthly installments from June 2017 CPFL Energia guarantee and liens on equipment cdi SELIC SELIC TRUE FINAME 1,251 — SELIC + 3.86% 48 monthly installments from August 2017 CPFL Energia guarantee and liens on equipment cdi SELIC SELIC TRUE FINAME 1,262 1,147 TJLP + 3.40% 36 monthly installments from August 2017 CPFL Energia guarantee and liens on equipment cdi TJLP TJLP TRUE FINAME 588 495 SELIC + 3.74% 36 monthly installments from August 2017 CPFL Energia guarantee and liens on equipment TJLP SELIC SELIC TRUE FINAME 2,613 — SELIC + 3.58% to 3.72% 36 monthly installments from January 2019 CPFL Energia guarantee and liens on equipment cdi SELIC SELIC TRUE FINAME 8,905 — TJLP + 3.25% to 3.38% 36 monthly installments from January 2019 CPFL Energia guarantee and liens on equipment TJLP TJLP TJLP TRUE CPFL Telecom TRUE FINAME — 7,448 Fixed rate 6.0% (b) 60 monthly installments from December 2016 CPFL Energia guarantee Others FIX fix TRUE FINEM — 7,849 SELIC + 3.12% (h) 60 monthly installments from December 2016 CPFL Energia guarantee cdi SELIC SELIC TRUE FINEM — 21,342 TJLP + 2.12% to 3.12% (c) 60 monthly installments from December 2016 CPFL Energia guarantee TJLP TJLP TJLP TRUE FINEM — 470 TJLP 60 monthly installments from December 2016 CPFL Energia guarantee TJLP TJLP TJLP TRUE CPFL Transmissão Piracicaba TRUE FINAME 14,275 16,871 Fixed rate 3.0% 96 monthly installments from July 2015 CPFL Energia guarantee Others FIX fix TRUE CERAN TRUE BNDES — 266,484 TJLP + 3.69% to 5% 208 monthly installments from December 2005 Pledge of shares; assignment of credit, concession rights and revenues TJLP TJLP TJLP TRUE BNDES — 48,409 UMBNDES + 5% (1) 208 monthly installments from February 2006 Pledge of shares; assignment of credit, concession rights and revenues cdi USD usd TRUE CPFL Renováveis TRUE FINEM I 232,310 262,224 TJLP + 1.95% 168 monthly installments from October 2009 Pledge of the subdidiary's and PCH Holding's shares; assignment of credit and concession rights ; and liens on equipment TJLP TJLP TJLP TRUE FINEM II 18,951 22,210 TJLP + 1.90% 144 monthly installments from June 2011 CPFL Energia and CPFL Bioenergia guarantees, liens on assets and assignment of credit rights TJLP TJLP TJLP TRUE FINEM III 460,623 495,912 TJLP + 1.72% 192 monthly installments from May 2013 SGBP and CPFL Energia guarantees; pledge of subsidiary's shares; liens on assets; and assignment of credit rights TJLP TJLP TJLP TRUE FINEM V 69,485 80,362 TJLP + 2.8% to 3.4% 143 monthly installments from December 2011 CPFL Renováveis guarantee; pledge of subsidiary's shares; liens on assets; and assignment of credit and concession rights TJLP TJLP TJLP TRUE FINEM VI 69,619 74,737 TJLP + 2.05% 192 monthly installments from October 2013 SGBP, CPFL Energia and CPFL Renováveis guarantees; pledge of subsidiary's shares; and assignment of credit and concession rights TJLP TJLP TJLP TRUE FINEM VII 119,234 138,474 TJLP + 1.92 % 156 monthly installments from October 2010 Pledge of subsidiary's shares; liens on assets; and assignment of credit and concession rights TJLP TJLP TJLP TRUE FINEM IX 17,827 25,195 TJLP + 2.15% 120 monthly installments from May 2010 SGBP, CPFL Energia and CPFL Renováveis guarantees; pledge of subsidiary's shares; liens on assets; assignment of credit and concession rights and real estate mortgage TJLP TJLP TJLP TRUE FINEM X — 230 TJLP 84 monthly installments from October 2010 Pledge of subsidiary's shares; liens on assets; and assignment of credit and concession rights TJLP TJLP TJLP TRUE FINEM XI 95,016 105,670 TJLP + 1.87% to 1.9% 168 monthly installments from January 2012 CPFL Energia guarantee; liens on assets; and assignment of credit rights TJLP TJLP TJLP TRUE FINEM XII 297,835 317,289 TJLP and TJLP + 2.18% 192 monthly installments from July 2014 SGBP, CPFL Energia, CPFL Renováveis and Eólica Holding guarantees; pledge of the subsidiary's and Eólica Holding's shares; liens on assets; assignment of credit and concession rights TJLP TJLP TJLP TRUE FINEM XIII 298,439 318,257 TJLP + 2.02% to 2.18% 192 monthly installments from November 2014 SGBP, CPFL Energia and CPFL Renováveis guarantees; pledge of the subsidiary's shares; liens on assets; assignment of credit and concession rights TJLP TJLP TJLP TRUE FINEM XV 23,185 27,305 TJLP + 3.44% 139 monthly installments from September 2011 SGBP, CPFL Energia and CPFL Renováveis guarantees; pledge of the subsidiary's shares; and assignment of credit and concession rights TJLP TJLP TJLP TRUE FINEM XVI 4,335 6,418 Fixed rate 5.50% 101 monthly installments from September 2011 SGBP, CPFL Energia and CPFL Renováveis guarantees; pledge of the subsidiary's shares; and assignment of credit and concession rights Others FIX fix TRUE FINEM XVII 428,205 460,426 TJLP and TJLP + 2.18% 192 monthly installments from January 2013 Bank guarantee; pledge of the subsidiary's and DESA Eólica's shares; liens on assets; and assignment of credit and concession rights TJLP TJLP TJLP TRUE FINEM XVIII 9,044 13,763 Fixed rate 4.5% 102 monthly installments from June 2011 CPFL Energia and Bioenergia guarantees; liens on assets; and assignment of credit rights Others FIX fix TRUE FINEM XIX 27,579 29,559 TJLP + 2.02% 192 monthly installments from January 2014 SGBP, CPFL Energia and CPFL Renováveis guarantees; pledge of subsidiary's shares; liens on assets; and assignment of credit and concession rights TJLP TJLP TJLP TRUE FINEM XX 37,208 44,650 Fixed rate 2.5% 108 monthly installments from January 2014 SGBP, CPFL Energia and CPFL Renováveis guarantees; pledge of subsidiary's shares; liens on assets; and assignment of credit and concession rights Others FIX fix TRUE FINEM XXI 37,583 40,281 TJLP + 2.02% 192 monthly installments from January 2014 SGBP, CPFL Energia and CPFL Renováveis guarantees; pledge of subsidiary's shares; liens on assets; and assignment of credit and concession rights TJLP TJLP TJLP TRUE FINEM XXII 32,734 39,281 Fixed rate 2.5% 108 monthly installments from January 2014 SGBP, CPFL Energia and CPFL Renováveis guarantees; pledge of subsidiary's shares; liens on assets; and assignment of credit and concession rights Others FIX fix TRUE FINEM XXIII 1,153 1,729 Fixed rate 4.5% 102 monthly installments from June 2011 Pledge of subsidiary's shares; liens on assets; and assignment of credit and concession rights Others FIX fix TRUE FINEM XXIV 82,632 109,580 Fixed rate 5.5% 108 monthly installments from January 2012 SGBP and CPFL Energia guarantees; liens on assets; and assignment of credit rights Others FIX fix TRUE FINEM XXV 83,136 87,492 TJLP + 2.18% 192 monthly installments from July 2016 SGBP and CPFL Energia guarantees; pledge of subsidiary's shares; liens on assets; and assignment of credit and concession rights TJLP TJLP TJLP TRUE FINEM XXVI 681,912 525,011 TJLP + 2.75% 192 monthly installments from July 2017 SGBP and CPFL Energia guarantees; pledge of subsidiary's and T-16's shares; liens on assets; and assignment of credit and concession rights TJLP TJLP TJLP TRUE FINEM XXVII 67,584 70,532 TJLP + 2,02% 162 monthly installments from November 2016 SGBP, CPFL Energia and CPFL Renováveis guarantees; pledge of subsidiary's shares; and assignment of credit and concession rights TJLP TJLP TJLP TRUE FINEM XXVIII 1,415 — TJLP 144 monthly installments from January 2018 SGBP, CPFL Energia and CPFL Renováveis guarantees; pledge of subsidiary's shares; liens on assets; and assignment of credit and concession rights TJLP TJLP TJLP TRUE FINAME I 2,387 2,857 Fixed rate 2.5% 96 monthly installments from February 2015 CPFL Renováveis guarantee; and liens on assets Others FIX fix TRUE FINEP I 904 1,397 Fixed rate 3.5% 61 monthly installments from October 2014 Bank guarantee Others FIX fix TRUE FINEP II 9,516 10,445 TJLP - 1.0% 85 monthly installments from June 2017 Bank guarantee TJLP TJLP TJLP TRUE FINEP III 4,091 5,232 TJLP + 2.0% 73 monthly installments from July 2015 Bank guarantee Others FIX fix TRUE BNB I 92,926 100,323 Fixed rate 9.5% to 10% and compliance bonus of 15% 168 monthly installments from January 2009 SIIF Énergies do Brasil guarantee; pledge of subsidiary's shares; liens on assets; and assignment of credit and concession rights Others FIX fix TRUE BNB II 151,428 158,364 Fixed rate 10% and compliance bonus of 15% to 25% 222 monthly installments from May 2010 BVP S.A. and bank guarantees; pledge of subsidiary's shares; liens on assets; and assignment of credit and concession rights Others FIX fix TRUE BNB III 27,138 29,020 Fixed rate 9.5% and compliance bonus of 25% 228 monthly installments from July 2009 CPFL Renováveis guarantee; pledge of subsidiary's shares; liens on assets; and assignment of credit and concession rights Others FIX fix TRUE NIB 57,291 67,872 IGPM + 8.63% 50 quarterly installments from June 2011 Pledge of subsidiary's shares; liens on assets; and assignment of credit and concession rights IGP-M IGP-M igp-m TRUE TRUE Purchase of assets TRUE CPFL Eficiência TRUE FINAME 2,281 2,923 Fixed rate 4.5% to 8.7% 96 monthly installments from March 2012 CPFL Energia guarantee Others FIX fix TRUE FINAME 81 99 Fixed rate 6% 72 monthly installments from October 2016 CPFL Energia guarantee Others FIX fix TRUE FINAME 171 234 TJLP + 2.70% 48 monthly installments from August 2016 CPFL Energia guarantee TJLP TJLP TJLP TRUE FINAME 174 219 SELIC + 2.70% 48 monthly installments from August 2016 CPFL Energia guarantee cdi CDI CDI TRUE FINAME 100 121 Fixed rate 9.5% 36 monthly installments from September 2017 CPFL Energia guarantee Others FIX fix TRUE FINAME 515 678 Fixed rate 9.5% 48 monthly installments from February 2017 CPFL Energia guarantee and liens on equipment Others FIX fix TRUE FINAME 672 753 TJLP + 3.50% 48 monthly installments from August 2017 CPFL Energia guarantee and liens on equipment TJLP TJLP TJLP TRUE TRUE Financial institutions TRUE CPFL Paulista TRUE Banco do Brasil - Working capital — 380,403 104.90% of CDI (f) 2 annual installments from July 2017 CPFL Energia guarantee CDI CDI CDI TRUE CPFL Piratininga TRUE Banco do Brasil - Working capital — 66,951 104.90% of CDI (f) 2 annual installments from July 2017 CPFL Energia guarantee CDI CDI CDI TRUE Companhia Luz e Força Santa Cruz TRUE Banco do Brasil - Working capital — 50,213 104.90% of CDI (f) 2 annual installments from July 2017 CPFL Energia guarantee CDI CDI CDI TRUE Banco IBM - Working capital — 6,925 CDI + 0.27% (f) 12 semiannual installments from June 2015 CPFL Energia guarantee CDI CDI CDI TRUE CPFL Leste Paulista TRUE Banco IBM - Working capital — 5,405 100.0% of CDI 14 semiannual installments from December 2012 CPFL Energia guarantee CDI CDI CDI TRUE Banco IBM - Working capital — 20,955 CDI + 0.1% 12 semiannual installments from October 2014 CPFL Energia guarantee CDI CDI CDI TRUE Banco IBM - Working capital — 15,658 CDI + 0.27% 12 semiannual installments from March 2015 CPFL Energia guarantee CDI CDI CDI TRUE Banco IBM - Working capital — 6,993 CDI + 1.33% (f) 8 semiannual installments from January 2016 CPFL Energia guarantee CDI CDI CDI TRUE CPFL Sul Paulista TRUE Banco do Brasil - Working capital — 31,954 104.90% of CDI (f) 2 annual installments from July 2017 CPFL Energia guarantee CDI CDI CDI TRUE Banco IBM - Working capital — 7,888 CDI + 0.27% to 1.33 (f) 12 semiannual installments from June 2015 CPFL Energia guarantee CDI CDI CDI TRUE Banco IBM - Working capital — 6,784 CDI + 1.27% 8 semiannual installments from February 2017 CPFL Energia guarantee CDI CDI CDI TRUE Companhia Jaguari de Energia (CPFL Santa Cruz) TRUE Banco do Brasil - Working capital 95,682 4,413 104.90% of CDI (f) 2 annual installments from July 2017 CPFL Energia guarantee CDI CDI CDI TRUE Banco IBM - Working capital 35,895 — CDI + 0.27% (f) 12 semiannual installments from June 2015 CPFL Energia guarantee CDI CDI CDI TRUE Banco IBM - Working capital 5,180 — CDI + 1.33% (f) 8 semiannual installments from January 2016 CPFL Energia guarantee CDI CDI CDI TRUE Banco IBM - Working capital 5,652 — CDI + 1.27% 8 semiannual installments from February 2017 CPFL Energia guarantee CDI CDI CDI TRUE Banco IBM - Working capital 13,111 10,726 100.0% of CDI 14 semiannual installments from December 2012 CPFL Energia guarantee CDI CDI CDI TRUE Banco IBM - Working capital 25,443 11,297 CDI + 0.1% 12 semiannual installments from October 2014 CPFL Energia guarantee CDI CDI CDI TRUE CPFL Mococa TRUE Banco do Brasil - Working capital — 28,911 104.90% of CDI (f) 2 annual installments from July 2017 CPFL Energia guarantee CDI CDI CDI TRUE Banco IBM - Working capital — 3,481 100.0% of CDI 14 semiannual installments from December 2012 CPFL Energia guarantee CDI CDI CDI TRUE Banco IBM - Working capital — 13,296 CDI + 0.27% 12 semiannual installments from March 2015 CPFL Energia guarantee CDI CDI CDI TRUE CPFL Serviços TRUE Banco IBM - Working capital 1,279 3,473 CDI + 0.10% 11 semiannual installments from June 2013 CPFL Energia guarantee CDI CDI CDI TRUE Promissory notes 46,941 — 104.0% of CDI 1 installment in June 2018 CPFL Energia guarantee CDI CDI CDI TRUE CPFL Geração TRUE Banco do Brasil - Working capital 630,309 641,316 109.5% of CDI 1 installment in March 2019 CPFL Energia guarantee CDI CDI CDI TRUE CPFL Telecom TRUE Banco IBM - Working capital — 31,449 CDI + 0.18% 12 semiannual installments from August 2014 CPFL Energia guarantee CDI CDI CDI TRUE CPFL Transmissão Morro Agudo TRUE Santander — 5,031 CDI + 1.60% 1 installment in March 2017 CPFL Energia guarantee CDI CDI CDI TRUE CPFL Renováveis TRUE Bradesco 204,934 250,363 CDI + 0.5% 8 annual installment from June 2013 No collateral CDI CDI CDI TRUE Safra 194,006 208,547 105% of CDI 14 installments from August 2016 No collateral CDI CDI CDI TRUE Banco BBM - Bank credit note 44,095 44,171 CDI + 3.40% 1 installment in March 2018 No collateral CDI CDI CDI TRUE Banco BBM - Bank credit note 26,198 — CDI + 1.90% Bullet CPFL Renováveis guarantee CDI CDI CDI TRUE Banco ABC - Bank credit note — 44,217 CDI + 3.80% 1 installment in December 2017 No collateral CDI CDI CDI TRUE Deustche Bank - Bank credit note 46,966 — CDI + 1.45% Bullet CPFL Renováveis promissory note CDI CDI CDI TRUE Banco ABC - Promissory notes 102,006 105,883 CDI + 3.80% 4 semiannual installments from February 2017 No guarantee CDI CDI CDI TRUE Banco BBM - Promissory notes 63,582 — CDI + 1.39% 1 installment in June 2018 CPFL Renováveis guarantee CDI CDI CDI TRUE TRUE Others TRUE Eletrobrás TRUE CPFL Paulista 2,410 2,960 RGR + 6% to 6.5% 120 monthly installments from January 2013 Receivables and promissory notes Others RGR RGR TRUE RGE 3,988 5,851 RGR + 6% 120 monthly installments from May 2008 Receivables and promissory notes Others RGR RGR TRUE RGE SUL 18,970 25,946 RGR + 6% 120 monthly installments from December 2008 Bank guarantee; assignment of credit rights; and promissory notes Others RGR RGR TRUE CPFL Santa Cruz — 508 RGR + 6% 120 monthly installments from January 2007 Receivables and promissory notes Others RGR RGR TRUE CPFL Leste Paulista — 338 RGR + 6% 120 monthly installments from February 2008 Receivables and promissory notes Others RGR RGR TRUE CPFL Sul Paulista — 303 RGR + 6% 120 monthly installments from August 2007 Receivables and promissory notes Others RGR RGR TRUE CPFL Jaguari — 9 RGR + 6% 120 monthly installments from June 2007 Receivables and promissory notes Others RGR RGR TRUE CPFL Mococa — 122 RGR + 6% 120 monthly installments from January 2008 Receivables and promissory notes Others RGR RGR TRUE Others 49,372 66,141 Others Outros Outros TRUE Subtotal local currency 6,165,427 7,579,974 TRUE TRUE Foreign currency TRUE Measured at fair value TRUE Financial institutions TRUE CPFL Paulista TRUE Bank of America Merrill Lynch 332,766 327,503 US$+Libor 3 months+1.35% (3) 1 installment in october 2018 CPFL Energia guarantee and promissory notes CDI USD usd TRUE Bank of America Merrill Lynch 148,930 146,703 US$+Libor 3 months+1.70% (4) 1 installment in September 2018 CPFL Energia guarantee and promissory notes CDI USD usd TRUE Bank of Tokyo-Mitsubishi 165,826 163,279 US$ + Libor 3 months + 0.88% (3) (g) 1 installment in February 2020 CPFL Energia guarantee and promissory notes CDI USD usd TRUE Bank of Tokyo-Mitsubishi 124,211 163,106 US$+Libor 3 months+0.80% (3) (f) 4 semiannual installments from September 2017 CPFL Energia guarantee and promissory notes CDI USD usd TRUE BNP Paribas — 68,663 Euro + 1.6350% (2) 1 installment in January 2018 CPFL Energia guarantee and promissory notes CDI EUR eur TRUE HSBC — 282,808 US$ + Libor 3 months + 1.30% (2) 1 installment in January 2018 CPFL Energia guarantee and promissory notes CDI USD usd TRUE J.P. Morgan — 130,522 US$ + 2.28% to 2.32% (3) 1 installment in December 2017 CPFL Energia guarantee and promissory notes CDI USD usd TRUE J.P. Morgan — 115,382 US$ + 2.36% to 2.39% (3) 1 installment in January 2018 CPFL Energia guarantee and promissory notes CDI USD usd TRUE J.P. Morgan 83,783 82,544 US$ + 2.74% (3) 1 installment in January 2019 CPFL Energia guarantee and promissory notes CDI USD usd TRUE J.P. Morgan — 49,311 US$ + 2.2% (3) 1 installment in February 2018 CPFL Energia guarantee and promissory notes CDI USD usd TRUE Bank of America Merrill Lynch 498,061 490,334 US$ + Libor 3 months + 1.40% (3) 1 installment in February 2018 CPFL Energia guarantee and promissory notes CDI USD usd TRUE Mizuho Bank 248,189 244,484 US$+Libor 3 months+1.55% (3) (f) 3 semiannual installments from March 2018 CPFL Energia guarantee and promissory notes CDI USD usd TRUE Syndicated transaction (**) - Bank of America Merrill Lynch, Citibank, HSBC and EDC-Export Development Canada 221,475 218,104 US$ + Libor 3 months + 2.7% (4) 5 semiannual installments from May 2019 CPFL Energia guarantee and promissory notes CDI USD usd TRUE CPFL Piratininga TRUE BNP Paribas 218,814 188,822 Euro + 1.6350% (3) 1 installment in January 2018 CPFL Energia guarantee and promissory notes CDI EUR eur TRUE Citibank 207,743 204,486 US$ + Libor 3 months + 1.41% (3) 2 annual installments from January 2019 CPFL Energia guarantee and promissory notes CDI USD usd TRUE Citibank 165,740 163,225 US$ + Libor 3 months + 1.35% (4) 1 installment in March 2019 CPFL Energia guarantee and promissory notes CDI USD usd TRUE Scotiabank — 54,235 US$ + 2.08% (3) 1 installment in August 2017 CPFL Energia guarantee and promissory notes CDI USD usd TRUE Sumitomo 166,346 163,712 US$ + Libor 3 months + 1.35% (3) (f) 1 installment in April 2018 CPFL Energia guarantee and promissory notes CDI USD usd TRUE Syndicated transaction (**) - Bank of America Merrill Lynch, Citibank, HSBC and EDC-Export Development Canada 221,475 218,104 US$ + Libor 3 months + 2.7% (4) 5 semiannual installments from May 2019 CPFL Energia guarantee and promissory notes CDI USD usd TRUE RGE TRUE Bank of Tokyo-Mitsubishi 59,793 58,852 US$ + Libor 3 months + 0.82%(3) 1 installment in April 2018 CPFL Energia guarantee and promissory notes CDI USD usd TRUE Bank of Tokyo-Mitsubishi 271,893 267,740 US$ + Libor 3 months + 0.83%(3) 1 installment in May 2018 CPFL Energia guarantee and promissory notes CDI USD usd TRUE Syndicated transaction (**) - Bank of America Merrill Lynch, Citibank, HSBC and EDC-Export Development Canada 221,475 218,104 US$ + Libor 3 months + 2.7% (4) 5 semiannual installments from May 2019 CPFL Energia guarantee and promissory notes CDI USD usd TRUE Bank of Tokyo-Mitsubishi 172,592 — US$ + 1.9275% 1 installment in October 2018 CPFL Energia guarantee and promissory notes CDI USD usd TRUE HSBC — 44,496 US$ + Libor 3 months + 1.30% (2) 1 installment in October 2017 CPFL Energia guarantee and promissory notes CDI USD usd TRUE J.P. Morgan — 199,826 US$ + 2.78% (3) 1 installment in February 2018 CPFL Energia guarantee and promissory notes CDI USD usd TRUE CPFL Santa Cruz TRUE Scotiabank — 16,556 US$ + 3.37% (4) 1 installment in July 2019 CPFL Energia guarantee and promissory notes CDI USD usd TRUE CPFL Sul Paulista TRUE Scotiabank — 16,556 US$ + 3.37% (4) 1 installment in July 2019 CPFL Energia guarantee and promissory notes CDI USD usd TRUE CPFL Leste Paulista TRUE Scotiabank — 16,556 US$ + 3.37% (4) 1 installment in July 2019 CPFL Energia guarantee and promissory notes CDI USD usd TRUE CPFL Jaguari TRUE Scotiabank 67,219 16,556 US$ + 3.37% (4) 1 installment in July 2019 CPFL Energia guarantee and promissory notes CDI USD usd TRUE CPFL Geração TRUE HSBC — 326,159 US$+Libor 3 months + 1.30% (2) 1 installment in March 2017 CPFL Energia guarantee and promissory notes CDI USD usd TRUE China Construction Bank - Bank credit note 99,443 97,946 US$+Libor 3 months + 1.60% + 1.4% fee (4) 1 installment in June 2019 CPFL Energia guarantee and promissory notes CDI USD usd TRUE Scotiabank 119,314 117,550 US$ + 3.3703% (4) 1 installment in July 2019 CPFL Energia guarantee and promissory notes CDI USD usd TRUE Citibank 397,328 391,380 US$+Libor 3 months + 1.41% (3) 3 annual installments from September 2018 CPFL Energia guarantee and promissory notes CDI USD usd TRUE China Construction Bank - Bank credit note 33,120 32,624 US$ + Libor 3 months + 1.20% + 1.1% fee (3) 1 installment in September 2019 CPFL Energia guarantee and promissory notes CDI USD usd TRUE Scotiabank 165,572 163,125 US$ + 3.1259% 1 installment in December 2019 CPFL Energia guarantee Others USD usd TRUE Paulista Lajeado TRUE Banco Itaú 36,311 35,771 US$ + 3.196% (4) 1 installment in March 2018 CPFL Energia guarantee and promissory notes CDI USD usd TRUE CPFL Brasil TRUE Scotiabank 45,161 44,501 US$ + 2.779% (3) 1 installment in August 2018 CPFL Energia guarant

(17) DEBENTURES

(17) DEBENTURES	12 Months Ended
	Dec. 31, 2017
Debentures Abstract
DEBENTURES	December 31, 2016 Debentures issued Repayments of principal Interests and monetary adjustment Exchange rates December 31, 2017 Debentures 9,067,520 2,486,000 (2,231,451) 913,313 (981,986) 9,253,396 Borrowing costs (67,575) (33,371) - 24,076 - (76,870) Total 8,999,945 2,452,629 (2,231,451) 937,389 (981,986) 9,176,526 December 31, 2017 December 31, 2016 Issue Current and noncurrent interest Current Noncurrent Total Current and noncurrent interest Current Noncurrent Total CPFL Paulista 6th Issue Single series - - - - 47,079 198,000 462,000 707,079 7th Issue Single series 17,134 126,250 378,750 522,134 28,913 - 505,000 533,913 8th Issue 1st series 1,669 - 215,310 216,980 - - - - 8th Issue 2nd series 2,925 - 358,224 361,149 - - - - 8th Issue 3rd series 1,161 - 131,397 132,558 - - - - 22,890 126,250 1,083,681 1,232,821 75,992 198,000 967,000 1,240,992 CPFL Piratininga 6th Issue Single series 1,950 - 44,000 45,950 7,846 33,000 77,000 117,846 7th Issue Single series 7,973 58,750 176,250 242,973 13,455 - 235,000 248,455 8th Issue 2nd series 7,669 - 246,000 253,669 - - - - 8th Issue 1st series 1,174 - 61,125 62,299 - - - - 18,766 58,750 527,375 604,891 21,301 33,000 312,000 366,301 RGE 6th Issue Single series 8,864 - 200,000 208,864 35,666 150,000 350,000 535,666 7th Issue Single series 5,768 42,500 127,500 175,768 9,733 - 170,000 179,733 8th Issue 2nd series 7,812 - 250,000 257,812 - - - - 8th Issue 1st series 2,573 - 132,573 135,146 - - - - 25,017 42,500 710,073 777,590 45,399 150,000 520,000 715,399 Companhia Luz e Força Santa Cruz 1st Issue Single series - - - - 550 32,500 32,500 65,550 Companhia Jaguari de Energia (CPFL Santa Cruz) 1st Issue Single series 135 32,500 - 32,635 - - - - RGE Sul 4th Issue Single series 16,662 - 1,100,000 1,116,662 32,058 - 1,100,000 1,132,058 6th Issue Single series 312 - 220,000 220,312 - - - - 16,974 - 1,320,000 1,336,974 32,058 - 1,100,000 1,132,058 CPFL Brasil 3rd Issue Single series 6,059 - 400,000 406,059 11,657 - 400,000 411,657 CPFL Geração 5th Issue Single series 3,366 546,000 - 549,366 12,969 546,000 546,000 1,104,969 6th Issue Single series 13,671 153,318 306,682 473,671 23,228 - 460,000 483,228 7th Issue Single series 8,978 - 635,000 643,978 16,379 - 635,000 651,379 8th Issue Single series 3,401 - 87,905 91,306 3,369 - 85,520 88,889 9th Issue Single series 550 - 51,672 52,221 524 - 50,278 50,802 29,966 699,318 1,081,259 1,810,543 56,470 546,000 1,776,798 2,379,268 CPFL Energia 5th Issue Single series 2,817 - 186,000 188,817 18,069 - 620,000 638,069 CPFL Renováveis 1st Issue - SIIF (*) 1st to 12th series 762 44,968 449,678 495,408 762 41,938 461,314 504,014 1st Issue - PCH Holding 2 Single series 260 8,701 123,391 132,352 644 8,700 132,091 141,435 1st Issue - Dobrevê Single series - - - - 425 17,500 - 17,925 2nd Issue - Dobrevê Single series 39,857 43,329 21,671 104,857 29,153 - 65,000 94,153 1st Issue - Pedra Cheirosa I Single series 1,617 64,653 - 66,270 6,675 52,200 - 58,875 1st Issue - Pedra Cheirosa II Single series 1,481 59,203 - 60,684 6,114 47,800 - 53,914 1st Issue - Boa Vista II Single series - - - - 6,395 50,000 - 56,395 1st Issue - CPFL Renováveis Single series 2,970 64,500 258,000 325,470 6,160 43,000 322,500 371,660 2nd Issue - CPFL Renováveis Single series 5,531 60,000 210,000 275,531 11,486 30,000 270,000 311,486 3rd Issue - CPFL Renováveis Single series 2,169 98,657 197,343 298,169 4,444 - 296,000 300,444 4th Issue - CPFL Renováveis 1st series 4,534 - 200,000 204,534 7,925 - 200,000 207,925 5th Issue - CPFL Renováveis Single series 9,716 12,000 88,000 109,716 - - - - 7th Issue - CPFL Renováveis Single series 6,244 - 253,529 259,773 - - - - 75,141 456,011 1,801,612 2,332,764 80,183 291,138 1,746,905 2,118,226 CERAN 1st Issue 1st series 181 106,000 212,000 318,181 - - - - 1st Issue 2nd series 121 - 212,000 212,121 - - - - 302 106,000 424,000 530,302 - - - - Borrowing costs (**) (7,580) (8,745) (60,546) (76,870) (7,346) (8,545) (51,684) (67,575) 190,489 1,512,584 7,473,454 9,176,526 334,333 1,242,092 7,423,518 8,999,945 190,487 1,512,584 7,473,454 9,176,526 334,334 1,242,093 7,423,519 8,999,946 Issue Quantity issued Annual Remuneration Annual Amortization conditions Collateral Taxa CPFL Paulista 6th Issue Single series 660 CDI + 0.8% CDI + 0.87% 3 annual installments from July 2017 CPFL Energia guarantee CDI 7th Issue Single series 50,500 CDI + 0.83% (3) CDI + 0.89% 4 annual installments from February 2018 CPFL Energia guarantee CDI 8th Issue 1st series 213,804 IPCA + 4.42% IPCA + 4.42% 1 installment in September 2022 CPFL Energia guarantee IPCA 8th Issue 2nd series 355,718 IPCA + 4.66% IPCA + 4.66% 2 annual installments from September 2023 CPFL Energia guarantee IPCA 8th Issue 3rd series 130,478 IPCA + 5.05% IPCA + 5.05% 3 annual installments from September 2025 CPFL Energia guarantee IPCA CPFL Piratininga 6th Issue Single series 110 CDI + 0.8% CDI + 0.91% 3 annual installments from July 2017 CPFL Energia guarantee CDI 7th Issue Single series 23,500 CDI + 0.83% (2) CDI + 0.89% 4 annual installments from February 2018 CPFL Energia guarantee CDI 8th Issue 2nd series 246,000 109.5% of CDI 109.5% CDI 2 annual installments from February 2021 CPFL Energia guarantee CDI 8th Issue 1st series 60,000 IPCA + 5.2901% IPCA + 5.2901% 2 annual installments from February 2023 CPFL Energia guarantee IPCA RGE 6th Issue Single series 500 CDI + 0.8% CDI + 0.88% 3 annual installments from July 2017 CPFL Energia guarantee CDI 7th Issue Single series 17,000 CDI + 0.83% (3) CDI + 0.88% 4 annual installments from February 2018 CPFL Energia guarantee CDI 8th Issue 2nd series 250,000 111.25% of CDI 111.25% CDI 2 annual installments from February 2021 CPFL Energia guarantee CDI 8th Issue 1st series 130,000 IPCA + 5.3473% IPCA + 5.3473% 2 annual installments from February 2023 CPFL Energia guarantee IPCA Companhia Luz e Força Santa Cruz 1st Issue Single series 650 CDI + 1.4% CDI + 1.52% 2 annual instalments from June 2017 CPFL Energia guarantee CDI Companhia Jaguari de Energia (CPFL Santa Cruz) 1st Issue Single series 650 CDI + 1.4% CDI + 1.52% 2 annual instalments from June 2017 CPFL Energia guarantee CDI RGE Sul 4th Issue Single series 110,000 114.5% of CDI 120.65% of CDI 2 annual installments from October 2019 CPFL Energia guarantee CDI 6th Issue Single series 520,000 CDI + 0.48% CDI + 0.48% 1 installment in December 2020 CPFL Energia guarantee CDI CPFL Brasil 3rd Issue Single series 40,000 114.5% of CDI 120.04% of CDI 2 annual installments from October 2019 CPFL Energia guarantee CDI CPFL Geração 5th Issue Single series 10,920 CDI + 1.4% CDI + 1.48% 2 annual instalments from June 2017 CPFL Energia guarantee CDI 6th Issue Single series 46,000 CDI + 0.75% (1) CDI + 0.75% 3 annual instalments from August 2018 CPFL Energia guarantee CDI 7th Issue Single series 63,500 CDI + 1.06% CDI + 1.11% 1 installment in April 2019 CPFL Energia guarantee CDI 8th Issue Single series 1 IPCA + 5.86% (1) 103.33% CDI 1 installment in April 2019 CPFL Energia guarantee IPCA 9th Issue Single series 50,000 IPCA+ 5.4764% 101.74% of CDI 1 installment in October 2021 CPFL Energia guarantee IPCA CPFL Energia 5th Issue Single series 62,500 114.5% of CDI 120.65% of CDI 2 annual installments from October 2019 No guarantee CDI CPFL Renováveis 1st Issue - SIIF 1st to 12th series 432,299,666 TJLP + 1% TJLP + 1% + 0.6% 39 semiannual installments from 2009 Liens TJLP 1st Issue - PCH Holding 2 Single series 1,581 CDI + 1.6% CDI + 1.8% 9 annual installments from June 2015 CPFL Renováveis guarantee CDI 1st Issue - Dobrevê Single series 20 CDI + 1.75% CDI + 1.75% 3 semiannual installments from May 2016 Unsecured CDI 2nd Issue - Dobrevê Single series 65 CDI + 1.34% CDI + 1.34% 3 semiannual installments from April 2018 Unsecured CDI 1st Issue - Pedra Cheirosa I Single series 5,220 CDI + 2.85% CDI + 2.85% 1 installment in March 2018 CPFL Renováveis guarantee CDI 1st Issue - Pedra Cheirosa II Single series 4,780 CDI + 2.85% CDI + 2.85% 1 installment in March 2018 CPFL Renováveis guarantee CDI 1st Issue - Boa Vista II Single series 5,000 CDI + 2.85% CDI + 2.85% 1 installment in September 2017 CPFL Renováveis guarantee CDI 1st Issue - CPFL Renováveis Single series 43,000 CDI + 1.7% CDI + 2.6% 9 annual installments from May 2015 Assignment of dividends of BVP and PCH Holding CDI 2nd Issue - CPFL Renováveis Single series 300,000 114.0% of CDI 129.39% CDI 5 annual instalments from June 2017 Unsecured CDI 3rd Issue - CPFL Renováveis Single series 29,600 117.25% of CDI 120.64% CDI 3 semiannual installments from April 2018 Unsecured CDI 4th Issue - CPFL Renováveis 1st series 20,000 126% CDI 134.22% CDI 3 annual installments from September 2019 CPFL Energia guarantee CDI 5th Issue - CPFL Renováveis Single series 100,000,000 129.5% of CDI 144.46% CDI Semiannual installments from June 2018 Assignment of 60% of quotas and credit rights of PPA contracts of Ludesa, and Dobrevê guarantee CDI 7th Issue - CPFL Renováveis Single series 250,000 IPCA + 5.62% IPCA + 6.14% Bullet CPFL Energia guarantee IPCA CERAN 1st Issue 1st series 318,000 107.75% of CDI 109.82% CDI 3 annual installments from December 2018 No guarantee CDI 1st Issue 2nd series 212,000 107.75% of CDI 109.82% CDI 2 annual installments from December 2021 No guarantee CDI The Company and its subsidiaries hold swaps that convert the prefixed component of interest on the operation to interest rate variation in reais, corresponding to: (1) 100.15% to 106.9% of CDI (2) 107% to 107.9% of CDI (3) 108% to 108.1% of CDI (*) These debentures can be converted into shares and, therefore, are considered in the calculation of the dilutive effect for earnings per share (note 24) (**) In accordance with IAS 39, this refers to borrowings costs attributable to issuance of the respective debt instruments. The maturities of the debentures recognized in noncurrent liabilities are scheduled as follows: 2019 2,549,412 2020 1,907,240 2021 1,061,702 2022 975,082 2023 423,730 2024 to 2028 556,288 Total 7,473,454 Main debentures issuances during the year R$ thousand Company Issue Quantity issued Released in 2017 Released net of issuance costs Interest Utilization CPFL Piratininga 8th Issue 306,000 306,000 303,437 Semiannual Subsidiary's investment plan, debt profile and working capital improvement RGE 8th Issue 380,000 380,000 376,605 Semiannual Subsidiary's investment plan, debt profile and working capital improvement CPFL Paulista 8th Issue 700,000 700,000 685,463 Semiannual Subsidiary's investment plan, debt profile and working capital improvement RGE Sul 6th Issue 520,000 220,000 219,887 Semiannual Subsidiary's investment plan, debt profile and working capital improvement CPFL Renováveis - parent company (a) 5th Issue 100,000,000 100,000 97,072 Semiannual Subsidiary's investment plan CPFL Renováveis - parent company (a) 7th Issue 250,000 250,000 243,472 Semiannual Subsidiary's investment plan CERAN 1st Issue 530,000 530,000 527,708 Semiannual Transfer of resources to shareholders 2,486,000 2,453,644 (a) There are no financial covenants. Pre-payment 6th issue - CPFL Paulista, CPFL Piratininga and RGE 5th issue of debentures - CPFL Energia RESTRICTIVE COVENANTS The debentures are subject to certain restrictive covenants, which include clauses that require the Company and its subsidiaries to maintain certain financial ratios within pre-established parameters. Moreover, these agreements contain restrictive non-financial covenants, which are complied with as per the last measurement period. CPFL Energia, CPFL Paulista, CPFL Piratininga, RGE, RGE Sul, CPFL Geração, CPFL Brasil, Companhia Jaguari de Energia (“CPFL Santa Cruz”) Maintaining, by the Company, of the following ratios: · Net indebtedness divided by EBITDA – maximum of 3.75; · EBITDA divided by Finance Income (Costs) - minimum of 2.25; For purposes of determination of covenants, the definition of EBITDA, in the Company, takes into consideration the consolidation of subsidiaries, associates and joint ventures based on the Company’s interest in those companies (for EBITDA and assets and liabilities). CPFL Renováveis The issues of debentures for the year ended December 31, 2017 contain clauses that require the subsidiary CPFL Renováveis to maintain the following financial ratios: - 1 st · Operating debt service coverage ratio - minimum of 1.00; · Debt service coverage ratio - minimum of 1.05; · Net indebtedness divided by EBITDA - maximum of 5.4 in 2016, 4.6 in 2017, 4.0 in 2018 and 2019 and 3.75 from 2020; · EBITDA divided by Net finance costs - minimum of 1.75. As at December 31, 2017, the subsidiary obtained approval from debenture holders for not comply with the following ratios: (i) Operating DSCR relating to the June 2017 calculation, through the General Meeting of Debenture Holders held on June 28, 2017; (ii) Operating DSCR relating to the December 2017 calculation, through the General Meeting of Debenture Holders held on June 28, 2017; - 2 nd rd · Net indebtedness divided by EBITDA - maximum of 5.6 in 2015, 5.4 in 2016, 4.6 in 2017, 4.0 in 2018 and 2019 and 3.75 from 2020. - 4 th · Maintaining net indebtedness divided by EBITDA - maximum of 5.4 in 2016, 4.6 in 2017, 4.0 from 2018. 7ª Emissão – CPFL Renováveis · Maintaining net indebtedness divided by EBITDA - maximum of 3.75 · Net indebtedness divided by EBITDA - maximum of 2.25 - 1 st · Maintaining the Debt Service Coverage ratio of the subsidiary Santa Luzia at 1.2 or more from September 2014. · Net indebtedness divided by EBITDA - maximum of 5.4 in 2016, 4.6 in 2017, 4.0 in 2018 and 2019 and 3.75 from 2020. - 2 nd · Maintaining a net debt/dividend ratio less than or equal to 4.0 in 2016, 3.5 in 2017 and 3.5 in 2018. CERAN · Net Debt to EBITDA ratio less than or equal to 3.0, calculated semiannually. Various borrowings of the direct and indirect subsidiaries and joint ventures were subject to early maturity in the event of changes in the Company’s shareholding structure, except if at least one of the following shareholders, Camargo Corrêa and Previ, remained directly or indirectly in the Company’s control block. In view of the change of the Company’s shareholding control in January 2017, the Company negotiated previously with the Group’s creditors that they would not declare the early maturity of such debentures, which started including State Grid International Development Limited or any entity directly or indirectly controlled by State Grid Corporation of China as exception for not declaring the early maturity of the debt. Failure to comply with the restrictions mentioned may result in default in relation to other contractual obligations (cross default), depending on each agreement. The Group’s management monitors these ratios on a systematic and continuous basis to ensure that the conditions are complied with. In the opinion of the Group’s management, all covenants and clauses are properly complied at December 31, 2017.

(18) PRIVATE PENSION PLAN

(18) PRIVATE PENSION PLAN	12 Months Ended
	Dec. 31, 2017
Private Pension Plan
PRIVATE PENSION PLAN	The subsidiaries sponsor supplementary retirement and pension plans for their employees. The main characteristics of these plans are as follows: 18.1 – Characteristics CPFL Paulista The plan currently in force for the employees of the subsidiary CPFL Paulista through Fundação CESP is a Mixed Benefit Plan, with the following characteristics: i. Defined Benefit Plan (“BD”) – in force until October 31, 1997 – a defined benefit plan, which grants a Proportional Supplementary Defined Benefit (“BSPS”), in the form of a lifetime income convertible into a pension, to participants enrolled prior to October 31, 1997, the amount being defined in proportion to the accumulated past service time up to that date, based on compliance with the regulatory requirements for granting. The total responsibility for coverage of actuarial deficits of this plan falls to the subsidiary. ii. Mixed model, as from November 1, 1997, which covers: · benefits for risk (disability and death), under a defined benefit plan, in which the subsidiary assumes responsibility for Plan’s actuarial deficit, and · scheduled retirement, under a variable contribution plan, consisting of a benefit plan, which is a defined contribution plan up to the granting of the income, and does not generate any actuarial liability for the subsidiary CPFL Paulista. The benefit plan only becomes a defined benefit plan, consequently generating actuarial responsibility for the subsidiary, after the granting of a lifetime income, convertible or not into a pension. Additionally, the subsidiary’s Managers may opt for a Free Benefit Generator Plan – “PGBL” (defined contribution), operated by either Banco do Brasil or Bradesco. CPFL Piratininga As a result of the spin-off of Bandeirante Energia S.A. (subsidiary’s predecessor), the subsidiary CPFL Piratininga assumed the responsibility for the actuarial liabilities of that company’s employees retired and terminated until the date of spin-off, as well as for the obligations relating to the active employees transferred to CPFL Piratininga. On April 2, 1998, the Secretariat of Pension Plans – “SPC” approved the restructuring of the retirement plan previously maintained by Bandeirante, creating a "Proportional Supplementary Defined Benefit Plan – BSPS”, and a "Mixed Benefit Plan", with the following characteristics: i. Defined Benefit Plan (“BD”) - in force until March 31, 1998 – a defined benefit plan, which grants a Proportional Supplementary Defined Benefit (BSPS), in the form of a lifetime income convertible into a pension to participants enrolled until March 31, 1998, in an amount calculated in proportion to the accumulated past service time up to that date, based on compliance with the regulatory requirements for granting. In the event of death while working or the onset of a disability, the benefits incorporate the entire past service time. CPFL Piratininga has full responsibility for covering the actuarial deficits of this Plan. ii. Defined Benefit Plan - in force after March 31, 1998 – defined-benefit type plan, which grants a lifetime income convertible into a pension based on the past service time accumulated after March 31, 1998, based on 70% of the average actual monthly salary for the last 36 months of active service. In the event of death while working or the onset of a disability, the benefits incorporate the entire past service time. The responsibility for covering the actuarial deficits of this Plan is equally divided between CPFL Piratininga and the participants. iii. Variable Contribution Plan – implemented together with the Defined Benefit plan effective after March 31, 1998. This is a defined contribution type pension plan up to the granting of the income, and generates no actuarial liability for CPFL Piratininga. The pension plan only becomes a Defined Benefit type plan after the granting of the lifetime income, convertible (or not) into a pension, and accordingly starts to generate actuarial liabilities for the subsidiary. Additionally, the subsidiary’s Managers may opt for a Free Benefit Generator Plan – PGBL (defined contribution), operated by either Banco do Brasil or Bradesco. RGE A defined benefit type plan, with a benefit level equal to 100% of the adjusted average of the most recent salaries, less the presumed Social Security benefit, contribution with a Segregated Net Asset managed by Fundação CEEE. Only those whose employment contracts were transferred from CEEE to RGE are entitled to this benefit. A defined contribution private pension plan was set up in January 2006 with Bradesco Vida e Previdência for employees hired from 1997. RGE Sul Supplementary pension plans for its employees, former employees and related beneficiaries, managed by CEEE. The Single Plan is of the “defined benefit” type and is closed to new participants since February 2011. The Company’s contribution equates the contribution of the benefitted employees, in the proportion of one for one, including regarding the Fundação’s administrative costing plan. Currently the Itauprev plan is in effect, structured in the modality of defined contribution. Companhia Jaguari de Energia (“CPFL Santa Cruz”) Until December 31, 2017, the subsidiaries Companhia Leste Paulista de Energia, Companhia Jaguari de Energia, Companhia Sul Paulista de Energia and Companhia Luz e Força de Mococa had a private pension plan named CMSPREV, managed by IHPREV Fundo de Pensão, and subsidiary Companhia Luz e Força Santa Cruz had a benefits plan managed by BB Previdência - Fundo de Pensão from Banco do Brasil, both majority structured as a defined contribution plan. After December 31, 2017, with the grouping event mentioned in note 14.4.2, the company’s official plan is the CMSPREV, managed by IHPREV Fundo de Pensão. The same plan was maintained for employees that had the benefits plan managed by BB Previdência - Fundo de Pensão from Banco do Brasil. CPFL Geração The employees of the subsidiary CPFL Geração participate in the same pension plan as CPFL Paulista. In addition, managers may opt for a Free Benefit Generator Plan – PGBL (defined contribution), operated by either Banco do Brasil or Bradesco. 18.2 – Changes in the defined benefit plans December 31, 2017 CPFL CPFL Piratininga CPFL RGE RGE Sul Total Present value of actuarial obligations 4,615,061 1,247,462 110,801 365,924 524,293 6,863,541 Fair value of plan's assets (3,925,061) (1,105,738) (94,378) (387,322) (446,670) (5,959,170) Present value of net obligations (fair value of assets) 690,000 141,724 16,424 (21,399) 77,623 904,369 Effect of asset ceiling - - - 21,399 - 21,399 Net actuarial liability recognized in the statement of financial position 690,000 141,724 16,424 - 77,623 925,768 December 31, 2016 CPFL CPFL Piratininga CPFL RGE RGE Sul Total Present value of actuarial obligations 4,524,008 1,202,596 108,486 352,879 480,081 6,668,050 Fair value of plan's assets (3,723,563) (1,062,638) (89,533) (347,906) (405,251) (5,628,892) Net actuarial liability recognized in the statement of financial position 800,445 139,958 18,953 4,972 74,830 1,039,158 December 31, 2015 CPFL CPFL Piratininga CPFL RGE RGE Sul Total Present value of actuarial obligations 3,793,259 961,329 90,609 278,985 - 5,124,182 Fair value of plan's assets (3,355,589) (951,021) (80,332) (287,202) - (4,674,144) Present value of net obligations (fair value of assets) 437,670 10,308 10,277 (8,217) - 450,038 Effect of asset ceiling - - - 8,217 - 8,217 Net actuarial liability recognized in the statement of financial position 437,670 10,308 10,277 - - 458,255 The changes in the present value of the actuarial obligations and the fair value of the plan’s assets are as follows: CPFL CPFL Piratininga CPFL RGE RGE Sul Total Present value of actuarial obligations at December 31, 2014 3,820,563 986,972 88,621 279,283 - 5,175,439 Gross current service cost 1,183 3,733 160 (131) - 4,945 Interest on actuarial obligations 425,465 110,425 9,944 31,490 - 577,324 Participants' contributions transferred during the year 12 1,842 - 611 - 2,465 Actuarial loss: effect of changes in demographic assumptions (226) (614) (12) (6) - (858) Actuarial loss: effect of changes in financial assumptions (98,399) (70,590) (400) (11,884) - (181,273) Benefits paid during the year (355,339) (70,439) (7,704) (20,378) - (453,860) Present value of actuarial obligations at December 31, 2015 3,793,259 961,329 90,609 278,985 - 5,124,182 Business combination - - - - 474,710 474,710 Gross current service cost 828 3,242 76 59 365 4,570 Interest on actuarial obligations 467,872 121,158 11,184 35,211 8,469 643,894 Participants' contributions transferred during the year 59 2,020 - 319 165 2,563 Actuarial loss: effect of changes in demographic assumptions - - - 3,602 - 3,602 Actuarial loss: effect of changes in financial assumptions 619,805 193,653 14,911 57,795 3,613 889,773 Benefits paid during the year (357,813) (78,805) (8,292) (23,090) (7,241) (475,241) Present value of actuarial obligations at December 31, 2016 4,524,008 1,202,596 108,486 352,879 480,081 6,668,050 Gross current service cost 707 3,153 73 270 2,153 6,356 Interest on actuarial obligations 476,613 127,561 11,431 37,395 50,927 703,927 Participants' contributions transferred during the year 37 2,044 - 302 990 3,373 Actuarial loss: effect of changes in demographic assumptions 225 328 14 326 16,490 17,383 Actuarial loss: effect of changes in financial assumptions (6,993) (3,586) (372) (45) 8,153 (2,843) Benefits paid during the year (379,536) (84,634) (8,831) (25,203) (34,501) (532,705) Present value of actuarial obligations at December 31, 2017 4,615,061 1,247,462 110,801 365,924 524,293 6,863,541 CPFL CPFL Piratininga CPFL RGE RGE Sul Total Fair value of actuarial assets at December 31, 2014 (3,315,422) (913,589) (85,360) (273,019) - (4,587,390) Expected return during the year (375,527) (105,413) (9,691) (31,686) - (522,317) Participants' contributions transferred during the year (12) (1,842) - (611) - (2,465) Sponsors' contributions (81,111) (22,936) (1,687) (7,593) - (113,327) Actuarial loss (gain): return on assets 61,144 22,320 8,702 5,329 - 97,495 Benefits paid during the year 355,339 70,439 7,704 20,378 - 453,860 Fair value of actuarial assets at December 31, 2015 (3,355,589) (951,021) (80,332) (287,202) - (4,674,144) Business combination - - - - (415,621) (415,621) Expected return during the year (404,183) (115,607) (9,582) (35,632) (7,470) (572,474) Participants' contributions transferred during the year (59) (2,020) - (319) (165) (2,563) Sponsors' contributions (48,263) (13,405) (843) (9,441) (1,437) (73,389) Actuarial loss (gain): return on assets (273,282) (59,390) (7,068) (38,403) 12,201 (365,942) Benefits paid during the year 357,813 78,805 8,292 23,090 7,241 475,241 Fair value of actuarial assets at December 31, 2016 (3,723,563) (1,062,638) (89,533) (347,906) (405,251) (5,628,892) Expected return during the year (392,819) (113,470) (9,437) (37,412) (43,258) (596,396) Participants' contributions transferred during the year (37) (2,044) - (302) (990) (3,373) Sponsors' contributions (50,308) (17,296) (753) (7,296) (6,169) (81,822) Actuarial loss (gain): return on assets (137,870) 5,076 (3,486) (19,610) (25,503) (181,393) Benefits paid during the year 379,536 84,634 8,831 25,203 34,501 532,705 Fair value of actuarial assets at December 31, 2017 (3,925,061) (1,105,738) (94,378) (387,322) (446,670) (5,959,170) 18.3 Changes in the recognized assets and liabilities The changes in net liability are as follows: CPFL CPFL Piratininga CPFL RGE RGE Sul Total Net actuarial liability at December 31, 2014 505,140 73,383 3,261 6,264 - 588,048 Expenses (income) recognized in the statement of profit or loss 51,121 8,745 413 (95) - 60,184 Sponsors' contributions transferred during the year (81,111) (22,936) (1,687) (7,593) - (113,327) Actuarial loss (gain): effect of changes in demographic assumptions (226) (614) (12) (6) - (858) Actuarial loss (gain): effect of changes in financial assumptions (98,399) (70,590) (400) (11,884) - (181,273) Actuarial loss (gain): return on assets 61,144 22,320 8,702 5,329 - 97,495 Effect of asset ceiling - - - 7,984 - 7,984 Net actuarial liability at December 31, 2015 437,670 10,308 10,277 - - 458,255 Other contributions 16,149 526 63 127 - 16,865 Total liability 453,819 10,834 10,340 127 - 475,120 Current 648 27 - 127 - 802 Noncurrent 453,171 10,806 10,340 - - 474,318 CPFL CPFL Piratininga CPFL RGE RGE Sul Total Net actuarial liability at December 31, 2015 437,670 10,308 10,277 - - 458,255 Business combination - - - - 59,089 59,089 Expenses (income) recognized in the statement of profit or loss 64,514 8,791 1,677 158 1,364 76,505 Sponsors' contributions transferred during the year (48,263) (13,405) (843) (9,442) (1,438) (73,388) Actuarial loss (gain): effect of changes in demographic assumptions - - - 3,602 - 3,602 Actuarial loss (gain): effect of changes in financial assumptions 619,803 193,652 14,909 57,793 3,613 889,770 Actuarial loss (gain): return on assets (273,282) (59,390) (7,068) (38,403) 12,201 (365,942) Effect of asset ceiling - - - (8,738) - (8,738) Net actuarial liability at December 31, 2016 800,445 139,958 18,954 4,972 74,830 1,039,158 Other contributions 12,914 133 8 228 - 13,284 Total liability 813,359 140,091 18,962 5,200 74,830 1,052,442 Current 26,082 6,437 460 228 - 33,209 Noncurrent 787,276 133,653 18,502 4,972 74,830 1,019,233 CPFL CPFL Piratininga CPFL RGE RGE Sul Total Net actuarial liability at December 31, 2016 800,445 139,958 18,954 4,972 74,830 1,039,158 Expenses (income) recognized in the statement of profit or loss 84,501 17,244 2,067 253 9,822 113,887 Sponsors' contributions transferred during the year (50,308) (17,296) (753) (7,296) (6,169) (81,822) Actuarial loss (gain): effect of changes in demographic assumptions 225 328 14 326 16,490 17,383 Actuarial loss (gain): effect of changes in financial assumptions (6,993) (3,586) (372) (45) 8,153 (2,843) Actuarial loss (gain): return on assets (137,870) 5,076 (3,486) (19,610) (25,503) (181,393) Effect of asset ceiling - - - 21,399 - 21,399 Net actuarial liability at December 31, 2017 690,000 141,724 16,424 - 77,623 925,768 Other contributions 14,436 637 158 160 - 15,391 Total liability 704,436 142,361 16,582 160 77,623 941,160 Current 45,606 14,015 986 160 33 60,801 Noncurrent 658,829 128,346 15,595 - 77,589 880,360 18.4 Expected contributions and benefits The expected contributions to the plans for 2018 are shown below: 2018 CPFL Paulista 86,703 CPFL Piratininga 28,792 CPFL Geração 1,826 RGE 7,495 RGE Sul 6,370 Total 131,186 The expected benefits to be paid by the plan administrators in the next 10 years are shown below: 2018 2019 2020 2021 2022 to 2027 Total CPFL Paulista 374,545 387,635 399,573 410,879 2,663,707 4,236,339 CPFL Piratininga 84,231 88,618 92,230 96,650 667,185 1,028,914 CPFL Geração 9,010 9,252 9,572 9,829 63,274 100,937 RGE 26,223 27,396 28,545 29,487 200,079 311,730 RGE Sul 34,547 36,367 38,047 39,680 274,712 423,353 Total 528,556 549,268 567,967 586,525 3,868,957 6,101,273 At December 31, 2017, the average duration of the defined benefit obligation was 9.2 years for CPFL Paulista, 10.8 years for CPFL Piratininga, 9.4 years for CPFL Geração, 10.1 years for RGE and 11.0 years for RGE Sul. 18.5 Recognition of private pension plan income and expense The external actuarial estimate of the expenses (income) to be recognized in 2018 and the expense (income) recognized in 2017, 2016 and 2015 is as follows: 2018 Estimated CPFL CPFL Piratininga CPFL RGE RGE Sul Total Service cost 835 4,365 78 175 2,790 8,243 Interest on actuarial obligations 421,083 114,628 10,109 33,552 48,218 627,590 Expected return on plan assets (359,588) (102,621) (8,634) (35,950) (41,166) (547,959) Effect of asset ceiling - - - 2,035 - 2,035 Total expense (income) 62,330 16,372 1,553 (188) 9,842 89,909 2017 Actual CPFL CPFL Piratininga CPFL RGE RGE Sul Total Service cost 707 3,153 73 270 2,153 6,356 Interest on actuarial obligations 476,613 127,561 11,431 37,395 50,927 703,927 Expected return on plan assets (392,819) (113,470) (9,437) (37,412) (43,258) (596,396) Total expense (income) 84,501 17,244 2,067 253 9,822 113,887 2016 Actual CPFL CPFL Piratininga CPFL RGE RGE Sul* Total Service cost 828 3,242 76 59 365 4,570 Interest on actuarial obligations 467,872 121,158 11,184 35,211 8,469 643,894 Expected return on plan assets (404,184) (115,608) (9,582) (35,632) (7,470) (572,476) Effect of asset ceiling - - - 520 - 520 Total expense (income) 64,514 8,791 1,677 158 1,364 76,505 (*) The expenses and income presented for RGE Sul are related to November and December 2016 2015 Actual CPFL CPFL Piratininga CPFL RGE RGE Sul Total Service cost 1,183 3,733 160 (131) - 4,945 Interest on actuarial obligations 425,465 110,425 9,944 31,490 - 577,324 Expected return on plan assets (375,527) (105,413) (9,691) (31,686) - (522,317) Effect of asset ceiling - - - 232 - 232 Total expense (income) 51,121 8,745 413 (95) - 60,184 The main assumptions taken into consideration in the actuarial calculation at the end of the reporting period were as follows: CPFL Paulista, CPFL Geração and CPFL Piratininga RGE RGE Sul Dec. 31, 2017 Dec. 31, 2016 Dec. 31, 2015 Dec. 31, 2017 Dec. 31, 2016 Dec. 31, 2015 Dec. 31, 2017 Dec. 31, 2016 Nominal discount rate for actuarial liabilities: 9,51% p.a. 10,99% p.a. 12,67% p.a. 9,51% p.a. 10,99% p.a. 12,67% p.a. 9,51% p.a. 10,99% p.a. Nominal Return Rate on Assets: 9,51% p.a. 10,99% p.a. 12,67% p.a. 9,51% p.a. 10,99% p.a. 12,67% p.a. 9,51% p.a. 10,99% p.a. Estimated Rate of nominal salary increase: 6,08% p.a. ** 7% p.a. 6,79% p.a. 6,13% p.a. 8,15% p.a. 6,79% p.a. 6,1% p.a. 7,29% p.a. Estimated Rate of nominal benefits increase: 4% p.a. 5% p.a. 5% p.a. 4% p.a. 5% p.a. 5% p.a. 4% p.a. 5% p.a. Estimated long-term inflation rate (basis for determining the nominal rates above) 4% p.a. 5% p.a. 5% p.a. 4% p.a. 5% p.a. 5% p.a. 4% p.a. 5% p.a. General biometric mortality table: AT-2000 (-10) AT-2000 (-10) AT-2000 (-10) BR-EMS sb v.2015 BR-EMS sb v.2015 AT-2000 (-10) BR-EMS sb v.2015 AT-2000 Biometric table for the onset of disability: Low Light Low Light Low Light Medium Light Medium Light Low Light Medium Light Medium Light Expected turnover rate: ExpR_2012 ExpR_2012* ExpR_2012* Null Null ExpR_2012* Null Null Likelihood of reaching retirement age: 100% when a beneficiary of the plan first becomes eligible 100% when a beneficiary of the plan first becomes eligible 100% when a beneficiary of the plan first becomes eligible 100% one year after when a beneficiary of the plan first becomes eligible 100% one year after when a beneficiary of the plan first becomes eligible 100% one year after when a beneficiary of the plan first becomes eligible 100% one year after when a beneficiary of the plan first becomes eligible 100% one year after when a beneficiary of the plan first becomes eligible (*) FUNCESP experience, with aggravation of 40% (**) Estimated rate of nominal salary increase for CPFL Piratininga was 6.39% 18.6 Plan assets The following tables show the allocation (by asset segment) of the assets of the CPFL´s Group pension plans, at December 31, 2017 and 2016 managed by Fundação CESP and Fundação CEEE. The tables also show the distribution of the guarantee resources established as target for 2018, obtained in light of the macroeconomic scenario in December 2017. Assets managed by the plans are as follows: Assets managed by Fundação CESP Assets managed by Fundação CEEE CPFL Paulista and CPFL Geração CPFL Piratininga RGE RGE Sul 2017 2016 2017 2016 2017 2016 2017 2016 Fixed rate 77% 79% 80% 83% 79% 76% 78% 74% Federal governament bonds 53% 60% 49% 56% 64% 61% 65% 60% Corporate bonds (financial institutions) 4% 6% 7% 10% 9% 8% 8% 8% Corporate bonds (non financial institutions) 1% 1% 1% 1% 3% 4% 3% 4% Multimarket funds 2% 1% 2% 1% 2% 3% 1% 3% Other fixed income investments 17% 12% 22% 15% - - - - Variable income 15% 14% 14% 12% 18% 15% 18% 16% CPFL Energia's shares - 8% - 6% - - - - Investiment funds - shares 15% 6% 14% 7% 18% 15% 18% 16% Structured investments 3% 1% 3% 1% 1% 8% 1% 8% Equity funds - - - - 1% 7% 1% 7% Real estate funds - - - - 1% 1% 1% 1% Multimarket fund 3% 1% 3% 1% - - - - Total quoted in an active market 94% 94% 97% 97% 98% 98% 97% 98% Real estate 3% 3% 2% 2% 1% 1% 1% 1% Transactions with participants 1% 1% 2% 2% 2% 1% 2% 2% Other investments 1% 1% - - - - - - Escrow deposits and others 1% 1% - - - - - - Total not quoted in an active market 6% 6% 3% 3% 2% 2% 3% 2% The plan assets do not hold any properties occupied or assets used by the Company. The fair value of the shares stated in line item "Shares of CPFL Energia" in the assets managed by Fundação CESP was R$417,058 at December 31, 2016. Target for 2018 Fundação CESP (*) Fundação CEEE (*) CPFL Paulista and CPFL Geração CPFL Piratininga RGE RGE Sul Fixed income investments 72.80% 75.41% 80.50% 80.00% Variable income investments 18.67% 17.11% 16.00% 16.00% Real estate 3.18% 1.46% 0.50% 0.50% Transactions with participants 1.32% 1.61% 1.50% 2.00% Structured investments 2.56% 2.70% 1.50% 1.50% Investments abroad 1.47% 1.71% 0.00% 0.00% Total 100.00% 100.00% 100.00% 100.00% (*) Information not audited by the independent auditors The allocation target for 2018 was based on the recommendations for allocation of assets made at the end of 2017 by Fundação CESP and Fundação CEEE, in their Investment Policy. This target may change at any time during 2018, in light of changes in the macroeconomic situation or in the return on assets, among other factors. The asset management aims to maximize the return on investments, while seeking to minimize the risks of an actuarial deficit. Investments are therefore always made bearing in mind the liabilities that have to be honored. Fundação CESP and Fundação CEEE conduct studies of Asset Liability Management at least once a year, for a horizon longer than ten years. The ALM study also represents an important tool for the liquidity risk management of the pension plans since it considers the payment flow of benefits versus the assets considered liquid. The basis for determining the assumptions of estimated general return on the assets is supported by ALM. The main assumptions are macroeconomic projections for calculating the anticipated long-term profitability, taking into account the current benefit plan portfolios. ALM processes the ideal average long-term allocation of the plans’ assets and the estimated long-term profitability is based on this allocation and on the assumptions of the assets’ profitability. 18.7 Sensitivity analysis The significant actuarial assumptions for determining the defined benefit obligation are discount rate and mortality. The following sensitivity analyses were based on reasonably possible changes in the assumptions at the end of the reporting period, with the other assumptions remaining constant. Furthermore, in the presentation of the sensitivity analysis, the present value of the defined benefit obligation was calculated using the projected unit credit method at the end of the reporting period, the same method used to calculate the defined benefit obligation recognized in the statement of financial position, according to IAS 19. See below the effects on the defined benefit obligation if the discount rate were 0.25 percentage points lower (higher) and if life expectancy were to decrease (increase) in one year: Increase (Decrease) CPFL Paulista CPFL Piratininga CPFL Geração RGE RGE Sul Total Nominal discount (p.a.)* -0,25 p.p. 107,820 34,637 2,652 9,433 14,800 169,342 +0,25 p.p. (103,527) (33,051) (2,542) (9,027) (14,103) (162,250) General biometric mortality table** +1 year (101,296) (21,786) (2,334) (6,452) (9,244) (141,112) -1 year 99,533 21,195 2,296 6,273 8,990 138,287 * The assumption considered in the actuarial report for the nominal discount rate was 9.51% p.a. for all companies. The projected rates are increased or decreased by 0.25 p.p. to 9.26% p.a. and 9.76% p.a.. ** The assumption considered in the actuarial report for the mortality table was AT-2000 (-10) for CPFL Paulista, CPFL Piratininga and CPFL Geração; and BREMS sb v.2015 for RGE and RGE Sul. The projections were performed with 1 year of aggravation or softening on the respective mortality tables. 18.8 Investment risk of the private pension plan assets The major part of the resources of the Company’s benefit plans is invested in the fixed income segment and, within this segment, the greater part of the funds is invested in federal government bonds, indexed to the IGP-M, IPCA and SELIC, which are the indexes for adjustment of the actuarial liabilities of the Company’s plans (defined benefit plans), representing the matching between assets and liabilities. Management of the Company’s benefit plans is monitored by the Investment and Pension Plan Management Committee, which includes representatives of active and retired employees, as well as members appointed by the Company. Among the duties of the Committee are the analysis and approval of investment recommendations made by investment managers of Fundação CESP, which occurs at least quarterly. In addition to controlling market risks by the social security methodology, as required by law, Fundação CESP and Fundação CEEE uses the following tools to control market risks in the fixed income and variable income segments: VaR, Tracking Risk, Tracking Error and Stress Test. Fundação CESP's and Fundação CEEE Investment Policy imposes additional restrictions that, along those established by law, define the percentage of diversification for investments in assets issued or underwritten by the same legal entity.

(19) REGULATORY CHARGES

(19) REGULATORY CHARGES	12 Months Ended
	Dec. 31, 2017
Regulatory Charges
REGULATORY CHARGES	Dec 31, 2017 Dec 31, 2016 Fee for the use of water resources 1,256 1,385 Global reversal reserve - RGR 17,545 17,469 ANEEL inspection fee - TFSEE 2,061 2,044 Energy development account - CDE 262,213 309,117 Tariff flags and others 298,525 36,064 Total 581,600 366,078 Energy development account – CDE Tariff flags and others

(20) TAXES, FEES AND CONTRIBUTI

(20) TAXES, FEES AND CONTRIBUTIONS	12 Months Ended
	Dec. 31, 2017
Taxes Fees And Contributions
TAXES, FEES AND CONTRIBUTIONS	Dec 31, 2017 Dec 31, 2016 Current IRPJ (corporate income tax) 59,026 42,793 CSLL (social contribution on net income) 22,430 14,434 Income tax and social contribution 81,457 57,227 ICMS (State VAT) 403,492 416,096 PIS (tax on revenue) 32,486 28,759 COFINS (tax on revenue) 141,757 126,939 Others 51,111 52,522 Other taxes 628,846 624,316 Total current 710,303 681,544 Noncurrent PIS (tax on revenue) 18,839 26,814

(21) PROVISION FOR TAX, CIVIL A

(21) PROVISION FOR TAX, CIVIL AND LABOR RISKS AND ESCROW DEPOSITS	12 Months Ended
	Dec. 31, 2017
Provision For Tax Civil And Labor Risks And Escrow Deposits
PROVISION FOR TAX, CIVIL AND LABOR RISKS AND ESCROW DEPOSITS	December 31, 2017 December 31, 2016 Provision for tax, civil and labor risks Escrow Provision for tax, civil and labor risks Escrow Labor 224,258 122,194 222,001 110,147 Civil 291,388 97,100 236,915 114,214 Tax FINSOCIAL 33,473 95,903 32,372 90,951 Income Tax 150,020 382,884 142,790 150,439 Others 163,798 140,289 113,227 84,091 347,291 619,077 288,389 325,481 Others 98,196 1,620 85,971 229 Total 961,134 839,990 833,276 550,072 The changes in the provision for tax, civil, labor and other risks are shown below: Dec 31, 2016 Additions Reversals Payments Monetary Restatements Business combination Dec 31, 2017 Labor 222,001 98,267 (39,052) (78,056) 26,915 (5,817) 224,258 Civil 236,915 108,147 (38,074) (115,162) 18,298 81,264 291,388 Tax 288,389 34,005 (7,188) (1,055) 20,351 12,791 347,291 Others 85,971 9,883 (2,508) (12,514) 5,391 11,974 98,196 Total 833,276 250,302 (86,822) (206,788) 70,954 100,212 961,134 The provision for tax, civil, labor and other risks was based on the assessment of the risks of losing the lawsuits to which the Company and its subsidiaries are parties, where the likelihood of loss is probable in the opinion of the outside legal counselors and the Management of the Group. The principal pending issues relating to litigation, lawsuits and tax assessments are summarized below: a) Labor: b) Civil Bodily injury – Tariff increase – c) Tax FINSOCIAL Income Tax Other The line item of “others” refers mainly to lawsuits involving regulatory matters. Possible losses The Group is party to other lawsuits in which Management, supported by its external legal counselors, believes that the chances of a successful outcome are possible, i.e., is not more likely than not that will have disbursement for these cases, due to a solid defensive position in these cases, therefore no provision was registered. It is not yet possible to predict the outcome of the courts’ decisions or any other decisions in similar proceedings considered probable or remote. The claims relating to possible losses, at December 31, 2017 and 2016, were as follows: Dec 31, 2017 Dec 31, 2016 Main reasons for claims Labor 686,538 668,005 Work accidents, risk premium for dangerousness at workplace and overtime Civil 1,178,671 1,004,279 Personal injury, environmental impacts and overfed tariffs Tax 5,100,151 4,611,077 ICMS, FINSOCIAL, PIS, COFINS, Social Contributions and Income tax Regulatory 140,695 93,827 Technical, commercial and economic-financial supervisions Total 7,106,055 6,377,188 Tax – In August 2016, the subsidiary CPFL Renováveis received a tax legal proceeding notice in the amount of R$ 285,537 relating to the collection of Withholding Income Tax - IRRF on remuneration of capital gain incurred by parties resident and/or domiciled abroad, arising from the transaction of sale of Jantus SL, in December 2011, which the Company’s management, supported by the opinion of its outside legal counselors, classified the likelihood of a favorable outcome as possible. The subsidiary CPFL Geração, in December 2016, received two (2) tax legal proceeding notices that, summed up, total R$ 316,372 relating to the collection of Corporate Income Tax - IRPJ and Social Contribution on Profit – CSLL relating to calendar year 2011, calculated on the alleged capital gain identified on the acquisition of ERSA Energias Renováveis S.A. and recording of differences from the fair value remeasurement of SMITA Empreendimentos e Participações S.A., company acquired in a downstream merger, which the Company’s management, supported by its outside legal counselors, classified the likelihood of a favorable outcome as possible. As regards to labor contingencies, the Group informs that there is discussion about the possibility of changing the inflation adjustment index adopted by the Labor Court. Currently there is a decision of the Federal Supreme Court (STF) that suspends the change taken into effect by the Superior Labor Court (TST), which intended to change the index currently adopted by the Labor Court (“TR”), the IPCA-E. The Supreme Court considered that the TST’s decision entailed an unlawful interpretation and was not compliant with the determination of the effects of prior court decisions, violating its competence to decide on a constitutional matter. In view of such decision, and until there is a final decision by the STF, the index currently adopted by the Labor Court (“TR”) remains valid, which has been acknowledged by the TST (Superior Labor Court) in recent decisions. Accordingly, the management of the Group considers the risk of loss as possible and, as this matter still requires definition by the Courts, it is not possible to reliably estimate the amounts involved. Furthermore, in accordance with Law 13,467/17, of November 11, 2017, TR is the index for inflation adjustment used by the Labor Court since the date the law became effective. Based on the opinion of their external legal advisers, Management of the Group and its subsidiaries consider that the registered amounts represent best estimate.

(22) OTHER PAYABLES

(22) OTHER PAYABLES	12 Months Ended
	Dec. 31, 2017
Other Payables
OTHER PAYABLES	Current Noncurrent Dec 31, 2017 Dec 31, 2016 Dec 31, 2017 Dec 31, 2016 Consumers and concessionaires 93,068 73,864 44,473 44,711 Energy efficiency program - PEE 186,621 257,622 110,931 58,798 Research & Development - P&D 103,308 75,655 68,780 55,272 EPE/FNDCT/PROCEL 15,612 12,928 - - Reversion fund - - 17,750 17,750 Advances 300,214 163,054 22,255 8,029 Tariff discounts - CDE 25,040 8,891 - - Provision for socio environmental costs and asset retirement 16,360 13,703 107,814 61,828 Payroll 20,747 16,951 - - Profit sharing 80,518 56,215 16,273 11,400 Collections agreement 72,483 69,793 - - Guarantees - - 5,959 44,140 Business combination 6,927 9,492 - - Others 40,408 49,454 32,654 7,364 Total 961,306 807,623 426,889 309,292 Consumers and concessionaires: Research and Development and Energy Efficiency Programs: Advances Provision for socio environmental costs and asset retirement Tariff discounts – CDE: Profit sharing: (i) in accordance with a collective labor agreement, the Group introduced an employee profit-sharing program, based on the achievement of operating and financial targets previously established; (ii) Long-Term Incentive Program: refers to the Long-Term Incentive Plan for the Group’s Executives, approved by the Board of Directors, which consists in an incentive in financial resources based on salary multiples and that are driven by the company’s results and average performance in the three fiscal years after each concession.

(23) EQUITY

(23) EQUITY	12 Months Ended
	Dec. 31, 2017
EQUITY
EQUITY	The shareholders’ interest in the Company’s equity at December 31, 2017 and 2016 is shown below: Number of shares December 31, 2017 December 31, 2016 Shareholders Common shares Interest % Common shares Interest % State Grid Brazil Power Participações S.A. 730,435,698 71.76% - 0.00% ESC Energia S.A. 234,086,204 23.00% 234,086,204 23.00% Camargo Correa S.A. 27,435 0.00% 5,897,311 0.58% Caixa de Previdência dos Funcionários do Banco do Brasil - Previ - 0.00% 299,787,559 29.45% Fundação CESP - 0.00% 51,048,952 5.02% Fundação Sistel de Seguridade Social - 0.00% 37,070,292 3.64% Energia São Paulo FIA - 0.00% 35,145,643 3.45% Fundação Petrobras de Seguridade Social - Petros - 0.00% 28,056,260 2.76% Bonaire Participações S.A. - 0.00% 1,249,386 0.12% Fundação Sabesp de Seguridade Social - Sabesprev - 0.00% 696,561 0.07% BNDES Participações S.A. - 0.00% 68,592,097 6.74% Antares Holdings Ltda. - 0.00% 16,967,165 1.67% Brumado Holdings Ltda. - 0.00% 36,497,075 3.59% Executive Officers 189 0.00% 34,250 0.00% Other shareholders 53,365,220 5.24% 202,785,991 19.92% Total 1,017,914,746 100.00% 1,017,914,746 100.00% 23.1 Changes in shareholding structure and Public Offering of Shares On January 23, 2017, the Company received a correspondence from State Grid Brazil Power Participações S.A.. (“State Grid Brazil”) informing that on that date the Share Purchase Agreement between State Grid Brazil, Camargo Corrêa S.A., Caixa de Previdência dos Funcionários do Banco do Brasil – PREVI, Fundação CESP, Fundação Sistel de Seguridade Social, Fundação Petrobras de Seguridade Social – PETROS, Fundação SABESP de Seguridade Social — SABESPREV, and certain other parties, had been signed. After finalizing the transaction, State Grid Brazil became the parent company of CPFL Energia with 54.64% (556,164,817 shares, direct or indirect) of the Company’s voting and total capital. With the transaction, State Grid Brazil became the only controlling shareholder of the Company, and the Shareholders’ Agreement dated March 22, 2002 signed among the former shareholders was terminated. At the Company’s extraordinary general meeting held on March 27, 2017, the following resolutions were made (i) the selection of Credit Suisse (Brasil) S.A. to determine the Company’s economic value; (ii) the cancelation of the Company’s listing with the CVM as category “A”, and its conversion into category “B”; and (iii) withdrawal of the Company from the Listing Segment of Novo Mercado State Grid Brazil informed, through Significant Events: (i) on February 16, 2017, that it would conduct a public offering for acquisition of all the common shares held by the remaining shareholders of the Company (“Public Offering for Acquisition of Shares through Sale of Control”) and, on July 7, 2017, that it had decided to proceed only with the Public Offering for Acquisition of Shares through sale of control of the Company and through indirect sale of control of CPFL Renováveis; (i) on October 30 and 31, 2017, that CVM had formally approved all relevant documents and the proceeding with the Public Offering for Acquisition of Shares through Sale of Control and, as a result of the approval, State Grid Brazil published on October 31, 2017 the Public Offering Notice with the related terms and conditions. In a Significant Event Notice and Communication to the Market on November 30 and December 5, 2017, respectively, the Company informed that it had successfully conducted the public offering auction on the trading system of B3 S.A.– Brasil, Bolsa, Balcão (“Auction”). As a result of the auction, State Grid Brazil acquired 408,357,085 common shares of the Company, representing 88.44% of the total shares object of the Public Offering and 40.12% of the Company’s capital. The common shares were acquired for the price of R$ 27.69, totaling R$ 11,307,408. State Grid Brazil started holding, jointly with ESC Energia S.A., 964,521,902 common shares of the Company, increasing its joint interest from 54.64% to 94.75% of the Company’s total capital. 23.2 Capital reserves Refer basically to: (i) R$ 228,322 related to the CPFL Renováveis business combination in 2011, (ii) effect of the public offer of shares, in 2013, of the subsidiary CPFL Renováveis amounting to R$ 59,308, as a result of the reduction of the indirect interest in CPFL Renováveis, (iii) effect of the acquisition of DESA, amounting to R$ 180,297 in 2014, and (iv) other movements with no change of control amounting to R$87. In accordance with IFRS 10, these effects were recognized as transactions between shareholders, directly in Equity. 23.3 Earnings reserves Comprised of: i. Legal reserve, amounting to R$ 798,090; ii. Statutory reserve – concession financial asset: the distribution subsidiaries recognize in profit or loss the adjustment to the expected cash flow from the concession financial asset, however its financial realization will occur only upon the write-off of the concession financial asset arising from disposal or corporate restructuring or upon the indemnity (at the end of the concession). As result, the Company recognizes a statutory reserve – concession financial asset for these amounts, supported by article 194 of Law No. 6,404/76, until their financial realization. This statutory reserve amounts to R$826,601 (R$ 702,928 at December 31, 2016). 23.4 Accumulated other comprehensive income The accumulated other comprehensive income is comprised of: i. Deemed cost: refers to the recognition of the fair value adjustments of the deemed cost of the generating plants' property, plant and equipment, of R$ 405,840; ii. Private pension plan: The debt balance of R$ 570,346 (net of taxes) refers to the effects of the actuarial gains and losses recognized directly in other comprehensive income, in accordance with IAS 19. 23.5 Dividends At the Board of Directors’ Meeting held on January 5, 2017, approval was given for the declaration of interim dividend for 2016 in the amount of R$ 7,820. Furthermore, in 2017 the Company proposed R$ 280,191 of minimum mandatory dividend, as set forth by Law 6,404/76, and for each share the amount of R$ 0.275259517 was attributed. In 2017, the Company paid R$ 220,966 relating basically to the dividend for 2016. 23.6 Allocation of profit for the year The Company’s bylaws assure shareholders a minimum dividend of 25% of profit for the year, adjusted in accordance with the law. The proposed allocation of profit for the year is shown below: 2017 Profit for the year - Parent company 1,179,750 Realization of comprehensive income 25,873 Prescribed dividends 3,768 Profit base for allocation 1,209,391 Legal reserve (58,988) Statutory reserve - concession financial asset (123,673) Statutory reserve - working capital reinforcement (746,541) Mandatory dividend (280,191) Proposed additional dividend - For this year, considering the current macro scenario with the incipient economic recovery and, also considering the uncertainties regarding the hydrology, the Company’s management is proposing the allocation of R$746,541 to the statutory reserve - working capital reinforcement. 23.7 Noncontrolling interests and joint ventures The disclosure of interests in subsidiaries, in accordance with IFRS 12, is as follows: 23.7.1 Changes in noncontrolling interests CERAN CPFL Renováveis Paulista Lajeado Total As of December 31, 2014 214,454 2,171,911 67,427 2,453,794 Equity interests and voting capital 35.00% 48.39% 40.07% Equity attributable to noncontrolling interests 25,990 (20,611) 4,958 10,337 Dividends (6,173) (2,818) 843 (8,147) Other movements - 7 (48) (41) As of December 31, 2015 234,271 2,148,490 73,182 2,455,942 Equity interests and voting capital 35.00% 48.39% 40.07% Equity attributable to noncontrolling interests 38,621 (65,311) 4,862 (21,828) Dividends (9,172) (22,751) 1,096 (30,827) Other movements - 535 (1,176) (641) As of December 31, 2016 263,719 2,060,963 77,966 2,402,648 Equity interests and voting capital 35.00% 48.40% 40.07% Equity attributable to noncontrolling interests 37,949 13,720 11,623 63,292 Dividends (92,832) (16,619) (8,769) (118,220) Capital increase (reduction) (122,806) 15 - (122,791) Other movements - - (113) (113) As of December 31, 2017 86,031 2,058,079 80,707 2,224,816 Equity interests and voting capital 35.00% 48.40% 40.07% 23.7.2 Summarized financial information of subsidiaries that have interests of noncontrolling shareholders The summarized financial information on subsidiaries in which there is noncontrolling interests at December 31, 2017 and 2016, and for the years ended December 31, 2017, 2016 and 2015 are as follows: December 31, 2017 CERAN CPFL Renováveis Paulista Lajeado Current assets 110,566 1,623,645 48,037 Cash and cash equivalents 37,043 950,215 24,086 Noncurrent assets 848,445 11,232,357 120,677 Current liabilities 198,624 1,957,000 42,525 Borrowings and debentures 105,844 1,259,105 36,453 Other financial liabilities 12,360 7,258 264 Noncurrent liabilities 514,583 6,760,025 258 Borrowings and debentures 422,166 5,251,704 - Other financial liabilities 83,766 - - Equity 245,804 4,138,977 125,931 Attributable to owners of the Company 245,804 4,032,448 125,931 Attributable to noncontrolling interests - 106,529 - 2017 Net operating revenue 321,743 1,959,084 38,278 Operational costs and expenses (103,671) (737,472) (10,566) Depreciation and amortization (45,212) (617,017) (4) Interest income 30,489 126,041 2,089 Interest expense (40,202) (648,571) (4,050) Income tax expense (54,099) (74,125) (2,911) Profit (loss) for the year 108,427 19,645 29,006 Attributable to owners of the Company 108,427 11,484 29,006 Attributable to noncontrolling interests - 8,162 - December 31, 2016 CERAN CPFL Renováveis Paulista Lajeado Current assets 288,538 1,398,797 39,429 Cash and cash equivalents 238,241 908,982 24,688 Noncurrent assets 927,948 11,066,086 122,991 Current liabilities 121,646 1,313,466 9,586 Borrowings and debentures 60,162 889,981 324 Other financial liabilities 20,800 85,523 1,056 Noncurrent liabilities 341,356 6,713,610 36,404 Borrowings and debentures 254,732 5,517,890 36,167 Other financial liabilities 86,624 633 - Equity 753,484 4,437,807 116,431 Attributable to owners of the Company 753,484 4,324,589 116,431 Attributable to noncontrolling interests - 113,218 - 2016 Net operating revenue 301,179 1,646,589 30,820 Operational costs and expenses (67,242) (653,459) (27,404) Depreciation and amortization (48,082) (553,169) (3) Interest income 28,232 112,389 2,728 Interest expense (36,485) (591,626) (1,383) Income tax expense (55,596) (46,311) (1,137) Profit (loss) for the year 110,345 (143,706) 12,134 Attributable to owners of the Company 110,345 (151,900) 12,134 Attributable to noncontrolling interests - 8,195 - 2015 CERAN CPFL Renováveis Paulista Lajeado Net operating revenue 281,374 1,499,356 31,225 Operational costs and expenses (71,033) (498,005) (22,400) Depreciation and amortization (45,986) (540,578) (7) Interest income 17,532 115,639 2,243 Interest expense (40,801) (551,407) (1,206) Income tax expense (38,381) (49,221) (2,843) Profit (loss) for the year 74,256 (48,717) 12,374 Attributable to owners of the Company 74,256 (54,447) 12,374 Attributable to noncontrolling interests - 5,730 -

(24) EARNINGS PER SHARE

(24) EARNINGS PER SHARE	12 Months Ended
	Dec. 31, 2017
Earnings Per Share [Abstract]
EARNINGS PER SHARE	Earnings per share – basic and diluted The calculation of the basic and diluted earnings per share at December 31, 2017, 2016 and 2015 was based on the profit attributable to controlling shareholders and the weighted average number of common shares outstanding during the reporting years. For diluted earnings per share, the calculation considered the dilutive effects of instruments convertible into shares, as shown below: 2017 2016 2015 Numerator Profit attributable to controlling shareholders 1,179,750 900,885 864,940 Denominator Weighted average number of shares held by shareholders 1,017,914,746 1,017,914,746 (*) 1,017,914,746 Earnings per share - basic 1.16 0.89 0.85 Numerator Profit attributable to controlling shareholders 1,179,750 900,885 864,940 Dilutive effect of convertible debentures of subsidiary CPFL Renováveis (**) (11,966) (16,153) (19,811) Profit attributable to controlling shareholders 1,167,784 884,731 845,129 Denominator Weighted average number of shares held by shareholders 1,017,914,746 1,017,914,746 (*) 1,017,914,746 Earnings per share - diluted 1.15 0.87 0.83 (*) Considers the events occurred on April 29, 2016, related to the capital increase through the issuance of 24,900,531 shares (note 25). In accordance with IAS 33, when there is an increase in the number of shares without an increase in capital, the number of shares is adjusted as if the event had occurred at the beginning of the latest reporting period. (**) Proportional to the percentage of the Company's interest in the subsidiary in the respective years. The dilutive effect of the numerator in the calculation of diluted earnings per share takes into account the dilutive effects of the debentures convertible into shares issued by subsidiaries of the indirect subsidiary CPFL Renováveis. The calculation of the effects was based on the assumption that these debentures would have been converted into common shares of the subsidiaries at the beginning of each year.

(25) NET OPERATING REVENUE

(25) NET OPERATING REVENUE	12 Months Ended
	Dec. 31, 2017
Net Operating Revenue
NET OPERATING REVENUE	Number of Consumers In GWh R$ thousand Revenue from Eletric Energy Operations 2017 (*) 2016 (*) 2015 (*) 2017 (*) 2016 (*) 2015 (*) 2017 2016 2015 Consumer class Residential 8,330,237 8,174,700 6,906,580 19,122 16,473 16,164 11,663,084 10,367,415 9,833,419 Industrial 59,825 61,112 55,586 14,661 13,022 12,748 5,095,840 5,281,978 5,526,967 Commercial 545,095 551,171 473,333 10,220 9,720 9,259 5,498,867 5,431,926 5,266,432 Rural 359,106 355,586 245,238 3,762 2,474 2,152 1,173,569 816,684 750,209 Public administration 60,639 61,208 51,359 1,456 1,271 1,278 787,967 690,389 702,152 Public lighting 11,230 11,073 10,362 1,964 1,746 1,649 654,950 580,229 545,597 Public services 9,790 9,649 8,402 2,157 1,840 1,797 978,286 901,662 879,288 (-) Adjustment of revenues from excess demand and excess reactive power - - - - - - (65,991) (72,129) (79,362) Billed 9,375,922 9,224,499 7,750,860 53,342 46,546 45,049 25,786,572 23,998,155 23,424,701 Own comsuption - - - 34 32 33 - - - Unbilled (net) - - - - - - (89,575) 50,441 202,729 (-) Transfer or revenue related to the network availability for Captive Consumers - - - - - - (9,273,840) (9,055,188) (8,118,085) Electricity sales to final consumers 9,375,922 9,224,499 7,750,860 53,376 46,578 45,082 16,423,157 14,993,408 15,509,345 Furnas Centrais Elétricas S.A. 3,026 3,034 3,026 565,592 533,855 485,846 Other concessionaires and licensees 16,337 12,252 10,656 3,240,571 2,371,091 2,223,339 (-) Transfer or revenue related to the network availability for Captive Consumers - - - (56,528) (50,598) (46,982) Spot market energy 8,194 6,173 4,289 2,340,463 641,744 875,002 Electricity sales to wholesalers 27,557 21,459 17,971 6,090,098 3,496,092 3,537,205 Revenue due to Network Usage Charge - TUSD - Captive Consumers 9,330,368 9,105,786 8,165,066 Revenue due to Network Usage Charge - TUSD - Free Consumers 2,137,566 2,057,327 1,898,138 (-) Adjustment of revenues from excess demand and excess reactive power (21,861) (17,908) (16,884) Revenue from construction of concession infrastructure 2,073,423 1,354,023 1,046,669 Sector financial asset and liability (Note 8) 1,900,837 (2,094,695) 2,506,524 Concession financial asset - Adjustment of expected cash flow (note 11) 204,443 186,148 393,343 Energy development account - CDE - Low-income, tariff discounts - judicial injunctions and other tariff discounts 1,419,128 1,266,027 895,538 Other revenues and income 496,340 438,377 367,356 Other operating revenues 17,540,244 12,295,084 15,255,750 Total gross operating revenue 40,053,498 30,784,584 34,002,212 Deductions from operating revenue ICMS (5,455,718) (4,935,068) (4,686,039) PIS (603,050) (471,836) (529,322) COFINS (2,777,626) (2,172,777) (2,438,208) ISS (15,929) (10,568) (8,204) Global reversal reserve - RGR (2,952) (4,230) (2,529) Energy development account - CDE (3,185,693) (3,360,613) (3,970,013) Research and development and energy efficiency (191,997) (138,583) (158,516) PROINFA (166,743) (121,800) (90,910) Tariff flags and others (878,460) (430,077) (1,796,226) IPI (102) (195) (100) FUST and FUNTEL (19) (38) (24) Others (30,304) (26,709) (22,997) (13,308,593) (11,672,495) (13,703,089) Net operating revenue 26,744,905 19,112,089 20,599,212 25.1 Adjustment of revenues from excess demand and excess reactive power The tariff regulation procedure (“Proret”), in submodule 2.7 Other Revenues approved by ANEEL Normative Resolution No. 463 of November 22, 2011, determined that revenues from distribution subsidiaries received as a result of excess demand and excess reactive power, from the contractual tariff review date for the 3rd periodic tariff review cycle, should be accounted for as special obligations and would be amortized from the next tariff review. Beginining May 2015 for subsidiary CPFL Piratininga and September 2015 for subsidiary Companhia Jaguari de Energia (“CPFL Santa Cruz”), due to the 4 th th On February 7, 2012, the Brazilian Association of Electric Energy Distributors (Associação Brasileira de Distribuidores de Energia Elétrica - ABRADEE) succeeded in suspending the effects of Normative Resolution No. 463, whereby the request for preliminary judicial injunction relief was granted and the order to account for revenues from excess demand and excess reactive power as special obligations was suspended. The suspensive effect required by ANEEL in its interlocutory appeal was granted in June 2012 and the preliminary judicial injunction relief originally granted in favor of ABRADEE was suspended. The distribution subsidiaries are awaiting the court’s decision on the final treatment of these revenues. These amounts are accrued as sector financial liability, under special obligations which are being amortized, presented net in concession intangible asset, in compliance with IAS 37. 25.2 Extraordinary Tariff Review (“RTE”) – 2015 On February 27, 2015, the ANEEL approved the result of the Extraordinary Tariff Revision (RTE) in order to re-establish the tariff coverage for electric energy distributors given the significant increase in the CDE quota for 2015 and the cost of purchasing electric energy (Itaipú tariff and exchange variation, and auctions of existing electric power and of adjustment). The tariffs resulting from this RTE were in effect from March 2, 2015 up to the date of the next readjustment or tariff revision for each distributor. With respect to subsidiaries CPFL Leste Paulista, CPFL Sul Paulista, Companhia Jaguari de Energia (“CPFL Santa Cruz”), CPFL Mococa and Companhia Luz e Força Santa Cruz, on April 7, 2015, by means of Ratification Resolution No. 1,870, the ANEEL adjusted the result of the RTE of February 27, 2015, in order to change the amount of the monthly CDE quota – Energy relating to the ACR account, intended for amortization of credit operations by the CCEE in management of the ACR account. The tariffs resulting from such adjustment or rectification were in effect as from April 8, 2015 up to the date of the next tariff revision for each distributor. The average effects for the distributors’ consumers were: Effect perceived by consumers (*) Subsidiary Total Group A Group B CPFL Paulista 32.28% 40.05% 27.27% CPFL Piratininga 29.78% 40.49% 21.47% RGE 37.16% 43.36% 33.04% RGE Sul 39.45% 43.76% 36.23% Companhia Luz e Força Santa Cruz 10.04% 10.53% 9.78% CPFL Leste Paulista 19.54% 24.74% 17.55% Companhia Jaguari de Energia (CPFL Santa Cruz) 23.01% 25.01% 18.79% CPFL Sul Paulista 21.95% 37.67% 13.86% CPFL Mococa 16.59% 23.84% 13.97% (*) Information not audited by the independent auditors 25.3 Periodic tariff review (“RTP”) and Annual tariff adjustment (“RTA”) 2017 2016 2015 Subsidiary Month RTA Effect perceived by consumers (a) RTA / RTP Effect perceived by consumers (a) RTA / RTP Effect perceived by consumers (a) CPFL Paulista April -0.80% -10.50% 9.89% 7.55% 41.45% 4.67% CPFL Piratininga October 7.69% 17.28% -12.54% -24.21% 56.29% 21.11% RGE June 3.57% 5.00% -1.48% -7.51% 33.48% -3.76% RGE Sul April -0.20% -6.43% 3.94% -0.34% 52.45% 5.46% Companhia Luz e Força Santa Cruz March -1.23% -8.42% 22.51% 7.15% 34.68% 27.96% CPFL Leste Paulista March 0.77% -4.15% 21.04% 13.32% 20.80% 24.89% Companhia Jaguari de Energia (CPFL Santa Cruz) March 2.05% -2.56% 29.46% 13.25% 38.46% 45.70% CPFL Sul Paulista March 1.63% -10.73% 24.35% 12.82% 24.88% 28.38% CPFL Mococa March 1.65% -3.28% 16.57% 9.02% 23.34% 29.28% (a) Represents the average effect perceived by consumers, as a result of the elimination from the tariff base of financial components that had been added in the prior tariff adjustment (information not audited by the independent auditors) As mentioned in note 14.4.2, at December 31, 2017, the EGM approved the grouping of subsidiaries Companhia Luz e Força Santa Cruz, Companhia Leste Paulista de Energia, Companhia Jaguari de Energia, Companhia Sul Paulista de Energia e Companhia Luz and Força de Mococa In accordance with Normative Resolution 716, of May 3, 2016, until the first tariff review of the grouped concessionaire, which will take place in March 2021, ANEEL may apply the procedure that divides over time the variation in the tariffs of the former concessions and the unified tariff. This will occur in the tariff adjustment of March 2018. 25.4 Energy Development Account (CDE) – Low-income, tariff discounts – judicial injunctions, and other tariff discounts Law No. 12,783 of January 11, 2013 determined that the amounts related to the low-income subsidy, as well as other tariff discounts shall be fully subsidized by amount from the CDE. Income of R$1,419,128 (R$1,038,621 was recognized in 2016 and R$ 895,538 in 2015), of which R$96,882 for the low-income subsidy (R$ 93,879 in 2016 and R$66,313 in 2015) and R$1,226,777 for other tariff discounts (R$944,742 in 2016 and R$ 829,225 in 2015), against other receivables in line item “Other Receivables – Eletrobrás” (note 11) and “Other Payables – Tariff discounts – CDE” (note 22). 25.5 Tariff flags The system for application of Tariff Flags was created by means of Normative Resolution No. 547/2013, in effect as from January 1, 2015. Such mechanism can reflect the actual cost of the conditions for generation of electric energy in Brazil, mainly related to thermoelectric generation, energy security ESS, hydrologic risk and involuntary exposure of electric energy distributors. The green flag indicates favorable conditions and the tariff does not rise. The yellow flag indicates less favorable conditions, and the red flag is set off in costlier conditions. In the latter cases, the tariff increases R$ 1.00, R$ 3.00 and R$ 5.00 (before tax effects), respectively, for each 100 KWh consumed, readjusted by due to a decision issued by the Collegiate Board regarding Public Hearing No. 61/2017, as of November 1, 2017. In 2017, ANEEL approved the Tariff Flags billed from December 2016 to October 2017. The amount billed in this period was R$ 610,584 (R$ 430,065 in 2016), recognized in line item “Tariff flags and others”. From this amount, R$ 386,242 were used to offset part of the sector financial asset and liability (note 8) and R$ 224,395 were transferred to the centralizing account for tariff flag resources (“CCRBT”). The amount of R$ 298,507, relating to the tariff flag billed in November and December 2017 and not approved, is recognized in regulatory charges (note 19). 25.6 Energy Development Account – CDE By means of Ratification Resolution No. 2,202 of February 7 nd These quotas comprise: (i) annual quota of the CDE – Usage account; and (ii) CDE – Energy quota, related to part of the CDE contributions received by the electric energy distribution concessionaires in the period from January 2013 to January 2014, which should be paid by consumers and passed on to the CDE in up to five years as from the 2015 RTE. In addition, by means of Ratification Resolution No. 2,004 of December 15, 2015, the ANEEL established another quota intended for amortization of the ACR account, whose amount were updated by REH No. 2,231, of April 25, 2017 with payment and transfer to the CDE for the tariff period of each distribution company. 25.7 Adjustment for refunding the Reserve Energy Charge ("EER") of Angra III ANEEL approved through REH No. 2,214 of March 28, 2017 the republication of the energy tariff – TE and Distribution System Usage Tariff - TUSD for the distribution subsidiaries, with the purpose of refunding the amount forecast for the Reserve Energy Charge (EER) of the energy generation company UTN Almirante Alvaro Alberto - Unit III (Angra III). The tariffs resulting from this decision were effective in April 2017, however, as the reading period of each consuming unit does not coincide with the calendar month, this reduction occurred in the revenue amounts of April and May 2017, with its impact diluted between the two periods. The average effect perceived by the consumers was: -15.28% at CPFL Paulista, -6.8% at CPFL Piratininga, -10.89% at RGE, -13.76% at RGE Sul, -13.76% at Companhia Luz e Força Santa Cruz, -14.81% at Companhia Leste Paulista de Energia, -14.71% at Companhia Luz e Força de Mococa, -14.29% at Companhia Sul Paulista de Energia (as mentioned in note 14.4.2, in 2017 the subsidiaries CPFL Santa Cruz, CPFL Jaguari, CPFL Leste Paulista, CPFL Sul Paulista and CPFL Mococa were grouped, and they adopted the name CPFL Santa Cruz), and -16.49% at Companhia Jaguari de Energia (“CPFL Santa Cruz”). The estimated impact of this adjustment is an average reduction of -12.85% in revenues of distribution subsidiaries in April 2017.

(26) COST OF ELECTRIC ENERGY

(26) COST OF ELECTRIC ENERGY	12 Months Ended
	Dec. 31, 2017
Cost Of Electric Energy
COST OF ELECTRIC ENERGY	In GWh R$ thousand 2017 (*) 2016 (*) 2015 (*) 2017 2016 2015 Electricity purchased for resale Itaipu Binacional 11,779 10,497 10,261 2,350,858 2,025,780 2,869,481 Spot market / PROINFA 3,595 2,253 4,004 560,153 269,792 981,009 Energy purchased through auction in the regulated market and bilateral contracts 62,600 51,225 44,342 14,269,265 8,541,677 9,192,868 PIS and COFINS credit - - - (1,562,779) (987,997) (1,196,579) Subtotal 77,974 63,975 58,607 15,617,498 9,849,252 11,846,779 Electricity network usage charge Basic network charges 1,541,629 834,341 847,342 Transmission from Itaipu 159,896 53,248 51,236 Connection charges 122,536 84,927 56,312 Charges for use of the distribution system 39,451 38,699 40,332 System service charges - ESS, net of transfers from CONER (452,978) 362,735 555,851 Reserve energy charges - EER (303) 106,925 54,762 PIS and COFINS credit (126,213) (129,883) (140,868) Subtotal 1,284,020 1,350,990 1,464,967 Total 16,901,518 11,200,242 13,311,747 (*) Information not audited by the independent auditors

(27) OPERATING COSTS AND EXPENS

(27) OPERATING COSTS AND EXPENSES	12 Months Ended
	Dec. 31, 2017
Operating Costs and Expenses [Abstract]
OPERATING COSTS AND EXPENSES	2017 Cost of operation Cost of services rendered to third parties Operating Expenses Total Selling General and administrative Others Personnel 882,150 2 170,859 324,147 - 1,377,158 Private pension plans 113,887 - - - - 113,887 Materials 222,650 1,061 2,444 23,818 - 249,973 Third party services 251,549 1,856 186,525 287,201 - 727,151 Depreciation and amortization 1,143,795 - 5,403 93,639 - 1,242,837 Cost of infrastructure construction - 2,071,698 - - - 2,071,698 Others 157,113 (7) 225,000 218,247 438,494 1,038,847 Collection fees 11,710 - 68,757 - - 80,467 Allowance for doubtful accounts - - 155,097 - - 155,097 Leases and rentals 52,734 - (148) 19,740 - 72,326 Publicity and advertising 202 - 1 17,412 - 17,615 Legal, judicial and indemnities - - - 188,355 - 188,355 Donations, contributions and subsidies 88 - 2 3,924 - 4,014 Gain (loss) on disposal, retirement and other noncurrent assets - - - - 132,195 132,195 Amortization of concession intangible asset - - - - 286,215 286,215 Amortization of premium paid - GSF 9,594 - - - - 9,594 Financial compensation for use of water resources 8,656 - - - - 8,656 Impairment - - - - 20,437 20,437 Others 74,130 (7) 1,291 (11,184) (353) 63,877 Total 2,771,145 2,074,611 590,232 947,072 438,494 6,821,554 2016 Cost of operation Cost of services rendered to third parties Operating Expenses Total Selling General and administrative Others Personnel 686,434 1 134,864 272,618 - 1,093,918 Private pension plans 76,505 - - - - 76,505 Materials 164,168 1,412 8,191 16,175 - 189,946 Third party services 271,623 3,416 146,957 229,199 - 651,195 Depreciation and amortization 937,506 - 3,602 94,949 - 1,036,056 Cost of infrastructure construction - 1,352,214 - - - 1,352,214 Others 112,560 (11) 253,638 236,476 386,746 989,408 Collection fees - - 65,562 - - 65,562 Allowance for doubtful accounts - - 176,349 - - 176,349 Leases and rentals 42,163 - 113 17,109 - 59,385 Publicity and advertising 150 - 29 11,659 - 11,838 Legal, judicial and indemnities - - - 181,888 - 181,888 Donations, contributions and subsidies 54 - 9 2,425 - 2,488 Gain (loss) on disposal, retirement and other noncurrent assets - - - - 83,575 83,575 Amortization of concession intangible asset - - - - 255,110 255,110 Amortization of premium paid - GSF 9,594 - - - - 9,594 Financial compensation for use of water resources 12,233 - - - - 12,233 Impairment - - - - 48,291 48,291 Others 48,367 (11) 11,575 23,395 (231) 83,095 Total 2,248,795 1,357,032 547,251 849,419 386,746 5,389,240 2015 Cost of operation Cost of services rendered to third parties Operating Expenses Total Selling General and administrative Others Personnel 596,021 28 123,812 219,348 - 939,209 Private pension plans 60,184 - - - - 60,184 Materials 123,853 1,008 5,249 9,825 - 139,935 Third party services 187,080 2,777 128,022 241,115 - 558,994 Depreciation and amortization 870,427 - 21,826 84,985 - 977,238 Cost of infrastructure construction - 1,045,301 - - - 1,045,301 Others 69,633 (12) 185,673 308,226 357,653 921,173 Collection fees - - 56,990 - - 56,990 Allowance for doubtful accounts - - 126,879 - - 126,879 Leases and rentals 31,687 - (4) 16,874 - 48,558 Publicity and advertising 339 - 34 9,565 - 9,938 Legal, judicial and indemnities 10 - - 263,453 - 263,463 Donations, contributions and subsidies - - 16 3,418 - 3,434 Gain (loss) on disposal, retirement and other noncurrent assets - - - - 16,309 16,309 Amortization of concession intangible asset - - - - 302,665 302,665 Financial compensation for use of water resources 13,768 - - - - 13,768 Impairment - - - - 38,956 38,956 Others 23,829 (12) 1,759 14,916 (277) 40,214 Total 1,907,197 1,049,101 464,583 863,499 357,653 4,642,033

(28) FINANCE INCOME (COSTS)

(28) FINANCE INCOME (COSTS)	12 Months Ended
	Dec. 31, 2017
FINANCE INCOME (EXPENSES)
FINANCE INCOME (COSTS)	2017 2016 2015 Finance Income Income from financial investments 457,255 667,429 472,745 Late payment interest and fines 265,455 246,045 215,923 Adjustment for inflation of tax credits 19,623 32,371 57,580 Adjustment for inflation of escrow deposits 49,502 35,228 84,683 Adjustment for inflation and exchange rate changes 60,999 147,849 121,609 Discount on purchase of ICMS credit 16,386 16,198 13,027 Adjustments to the sector financial asset (note 8) - 32,747 162,786 PIS and COFINS on other finance income (48,322) (63,223) (52,849) PIS and COFINS on interest on capital (27,798) (2,324) (6,941) Other 87,214 88,182 74,685 Total 880,314 1,200,503 1,143,247 Finance expenses Interest on debts (1,661,060) (1,811,263) (1,725,252) Adjustment for inflation and exchange rate changes (540,053) (703,128) (686,575) (-) Capitalized interest 50,543 68,082 45,568 Adjustments to the sector financial liability (note 8) (82,333) (25,079) (1,573) Use of public asset (8,048) (14,950) (16,028) Others (126,917) (167,638) (167,250) Total (2,367,868) (2,653,977) (2,551,110) Finance expenses, net (1,487,554) (1,453,474) (1,407,863) Interests were capitalized at an average rate of 8.54% p.a. (10.9% p.a. in 2016 and 10.25% p.a. in 2015) on qualifying assets, in accordance with IAS 23. In line items Adjustment for inflation and exchange rate changes, the amounts include the effects of losses of R$235,852 (losses of R$ 1,399,988 in 2016 and gains of R$ 1,514,439 in 2015) on derivative instruments (note 33).

(29) SEGMENT INFORMATION

(29) SEGMENT INFORMATION	12 Months Ended
	Dec. 31, 2017
Segment Information
SEGMENT INFORMATION	The segregation of the Company’s operating segments is based on the internal financial information and management structure and is made by type of business: electric energy distribution, electric energy generation (conventional and renewable sources), electric energy commercialization and services rendered activities. Profit or loss, assets and liabilities per segment include items directly attributable to the segment, as well as those that can be allocated on a reasonable basis, if applicable. Prices charged between segments are based on similar market transactions. Note 1 presents the subsidiaries in accordance with their areas of operation and provides further information on each subsidiary and its business area and segment. The information segregated by segment is presented below, in accordance with the criteria established by Executive Officers: Distribution Generation Generation Commercialization Services Total Others (*) Elimination Total 2017 Net operating revenue 21,068,435 741,842 1,489,932 3,402,804 40,611 26,743,623 1,281 - 26,744,905 (-) Intersegment revenues 8,182 448,421 469,152 11,297 444,935 1,381,988 - (1,381,988) - Cost of electric energy (14,146,703) (147,379) (348,029) (3,196,028) - (17,838,139) - 936,621 (16,901,518) Operating costs and expenses (4,695,480) (156,340) (389,443) (47,296) (398,188) (5,686,747) (51,121) 445,366 (5,292,502) Depreciation and amortization (763,739) (123,129) (617,017) (3,054) (19,760) (1,526,699) (2,353) - (1,529,052) Income from electric energy service 1,470,695 763,415 604,596 167,724 67,598 3,074,028 (52,193) - 3,021,834 Equity - 312,390 - - - 312,390 - - 312,390 Finance income 597,133 102,713 137,746 19,117 10,693 867,402 12,912 - 880,314 Finance expenses (1,163,600) (431,289) (648,571) (52,023) (6,445) (2,301,928) (65,939) - (2,367,868) Profit (loss) before taxes 904,228 747,229 93,770 134,818 71,846 1,951,891 (105,220) - 1,846,670 Income tax and social contribution (299,510) (95,688) (74,125) (44,527) (16,994) (530,844) (72,784) - (603,629) Attributable to controlling shareholders 604,717 651,541 19,645 90,290 54,852 1,421,045 (178,004) - 1,243,042 Attributable to controlling shareholders 604,717 601,969 3,382 90,290 54,852 1,355,211 (178,004) - 1,177,206 Attributable to noncontrolling interests - 49,572 16,263 - - 65,835 - - 65,836 Total assets (**) 22,278,452 4,287,337 12,815,017 931,546 374,435 40,686,787 596,125 - 41,282,912 Purchases of PP&E and intangible assets 1,882,502 8,973 621,046 2,927 54,149 2,569,598 835 - 2,570,433 - 2016 Net operating revenue 15,017,166 593,775 1,334,571 2,024,350 81,595 19,051,456 60,633 - 19,112,089 (-) Intersegment revenues 22,526 409,338 338,357 62,757 318,770 1,151,748 8,661 (1,160,410) - Cost of electric energy (9,747,720) (98,521) (272,125) (1,876,952) - (11,995,318) - 795,075 (11,200,242) Operating costs and expenses (3,447,081) (106,364) (407,673) (47,548) (322,131) (4,330,797) (132,611) 365,334 (4,098,074) Depreciation and amortization (591,334) (126,596) (553,169) (3,779) (12,870) (1,287,748) (3,417) - (1,291,166) Income from electric energy service 1,253,557 671,631 439,961 158,829 65,363 2,589,342 (66,734) - 2,522,608 Equity - 311,414 - - - 311,414 - - 311,414 Finance income 781,365 182,574 132,653 31,513 10,742 1,138,848 61,655 - 1,200,503 Finance costs (1,331,973) (562,196) (667,344) (24,761) (5,272) (2,591,546) (62,432) - (2,653,978) Profit (loss) before taxes 702,950 603,424 (94,730) 165,581 70,832 1,448,057 (67,510) - 1,380,547 Income tax and social contribution (295,748) (98,530) (46,311) (53,225) (17,019) (510,833) 9,343 - (501,490) Profit (loss) for the year 407,202 504,894 (141,041) 112,357 53,813 937,225 (58,167) - 879,057 Attributable to controlling shareholders 407,202 461,411 (75,731) 112,357 53,813 959,052 (58,167) - 900,885 Attributable to noncontrolling interests - 43,483 (65,311) - - (21,828) - - (21,828) Total assets (**) 22,887,781 5,310,924 12,459,791 466,021 345,372 41,469,889 701,103 - 42,170,992 Purchases of PP&E and intangible assets 1,200,621 7,564 978,896 3,713 42,954 2,233,748 4,199 - 2,237,949 2015 Net operating revenue 16,945,222 572,553 1,262,297 1,716,348 55,547 20,551,967 47,246 - 20,599,212 (-) Intersegment revenues 22,318 411,038 335,979 82,544 239,088 1,090,966 3,136 (1,094,101) - Cost of electric energy (11,934,217) (223,495) (260,091) (1,629,793) - (14,047,596) - 735,849 (13,311,747) Operating costs and expenses (2,889,495) (85,388) (336,834) (39,632) (251,385) (3,602,734) (117,649) 358,257 (3,362,126) Depreciation and amortization (587,059) (131,969) (540,578) (4,534) (12,633) (1,276,773) (3,128) - (1,279,903) Income from electric energy service 1,556,770 542,738 460,772 124,933 30,617 2,715,830 (70,396) - 2,645,434 Equity - 216,885 - - - 216,885 - - 216,885 Finance income 740,628 110,018 131,354 42,840 44,098 1,068,938 74,310 - 1,143,247 Finance costs (1,256,801) (549,286) (599,303) (38,386) (4,858) (2,448,634) (102,477) - (2,551,110) Profit (loss) before taxes 1,040,597 320,354 (7,176) 129,386 69,857 1,553,017 (98,563) - 1,454,454 Income tax and social contribution (414,633) (37,570) (49,222) (41,282) (18,232) (560,939) (18,239) - (579,177) Profit (loss) for the year 625,965 282,783 (56,398) 88,104 51,625 992,079 (116,802) - 875,277 Attributable to controlling shareholders 625,965 251,831 (35,781) 88,104 51,625 981,744 (116,802) - 864,942 Attributable to noncontrolling interests - 30,954 (20,617) (0) - 10,337 - - 10,337 Total assets (**) 22,138,086 4,575,230 11,868,943 714,781 317,845 39,614,885 917,586 - 40,532,471 Purchases of PP&E and intangible assets 868,495 6,910 493,584 2,432 39,176 1,410,597 17,199 - 1,427,796 (*) Others - Refer basically to assets and transactions not related to any of the identified segments (**) Intangible assets, net of amortization, were allocated to their respective segments As the Brazilian economic conditions have deteriorated even further during 2017, the following was recorded R$20,437 of CPFL Renováveis (renewable generation segment) impairment losses (R$40,433 in 2016) and CPFL Telecom – “segment others”, an additional impairment of R$7,858 in 2016. This loss was recognized in the statement of profit or loss in line item “Other operating expenses” (note 27). The investment balance in joint ventures, accounted for under the equity method and classified in the generation (conventional source) segment, is R$1,022,696 (R$ 1,493,753 in 2016).

(30) RELATED PARTY TRANSACTIONS

(30) RELATED PARTY TRANSACTIONS	12 Months Ended
	Dec. 31, 2017
Related Party Transactions [Abstract]
RELATED PARTY TRANSACTIONS	The Company’s controlling shareholders were, as of December 31, 2017, as follows: · State Grid Brazil Power Participações S.A Indirect subsidiary of State Grid Corporation of China, a Chinese state-owned company primarily engaged in developing and operating businesses in the electric energy sector. · ESC Energia S.A. Subsidiary of State Grid Brazil Power Participações S.A. The direct and indirect interest in operating subsidiaries are described in note 1. Controlling shareholders, associates companies, joint ventures and entities under common control that in some way exercise significant influence over the Company are considered to be related parties. The main transactions are listed below: a) Purchase and sale of energy and charges - b) Intangible assets, Property, plant and equipment, Materials and Service c) Advances – d) Intragroup loans – To ensure that commercial transactions with related parties are conducted under usual market conditions, the Company set up a “Related Parties Committee”, comprising representatives of the controlling shareholders, responsible for analyzing the main transactions with related parties. The subsidiaries CPFL Paulista and CPFL Piratininga renegotiated with the subsidiary Ceran the extension of the original maturities of the energy purchase bills, previously from 15 November 2017 and 15 December 2017, to January 2018. The total compensation of key management personnel in 2017 was R$ 73,670 (R$ 58,132 in 2016 and R$ 43,208 in 2015). This amount comprises R$64,516 (R$49,989 in 2016 and R$ 44,061 in 2015) in respect of short-term benefits, R$1,516 (R$1,212 in 2016 and R$ 1,087 in 2015) of post-employment benefits and a provision of R$7,638 (R$ 6,930 in 2016 and reversal of provision of R$ 1,940 in 2015) for other long-term benefits, and refers to the amount recognized on an accrual basis. Transactions with entities under common control basically refer to transmission system charge paid by the Company’s subsidiaries to the direct or indirect subsidiaries of State Grid Corporation of China. Transactions between related parties involving controlling shareholders, entities under common control or with significant influence and joint ventures are as follows: ASSETS LIABILITIES INCOME EXPENSES December 31, 2017 December 31, 2016 December 31, 2017 December 31, 2016 2017 2016 2015 2017 2016 2015 Advances BAESA – Energética Barra Grande S.A. - - 691 726 - - - - - - Foz do Chapecó Energia S.A. - - 979 1,025 - - - - - - ENERCAN - Campos Novos Energia S.A. - - 1,212 1,269 - - - - - - EPASA - Centrais Elétricas da Paraiba - - 440 462 - - - - - - Energy purchases and sales, and charges Entities under common control (Subsidiaries of State Grid Corporation of China)* - - 13,330 - - - - 91,302 - - BAESA – Energética Barra Grande S.A. - - 13,169 5,642 - - 6,080 80,362 60,765 111,541 Foz do Chapecó Energia S.A. - - 37,415 35,018 - 215 4,996 381,193 358,272 330,675 ENERCAN - Campos Novos Energia S.A. 823 387 51,381 50,526 8,763 3,684 23,283 281,530 269,480 244,102 EPASA - Centrais Elétricas da Paraiba - - 19,458 12,418 - - 15,243 137,376 91,010 168,187 Intangible assets, property, plant and equipment, materials and services rendered BAESA – Energética Barra Grande S.A. 153 56 - - 1,582 521 1,354 - - - Foz do Chapecó Energia S.A. 2 104 - - 1,726 1,424 1,483 - - - ENERCAN - Campos Novos Energia S.A. 152 74 - - 1,665 1,826 1,354 - - - EPASA - Centrais Elétricas da Paraíba S.A. 416 1,599 - - (469) 488 720 - - - Intragroup loans EPASA - Centrais Elétricas da Paraíba S.A. - 38,078 - - 327 4,379 14,123 - - - Noncontrolling shareholders - CPFL Renováveis 8,612 9,067 - - (253) 1,039 1,475 - - - Dividend and interest on own capital BAESA – Energética Barra Grande S.A. 108 89 - - - - - - - - Chapecoense Geração S.A. 32,734 29,329 - - - - - - - - ENERCAN - Campos Novos Energia S.A. 21,184 40,983 - - - - - - - - Others Instituto CPFL - - - - - - - 3,613 - - The comparative information below refers to the period in which the controlling shareholders were those prior to the change of control described in note 23. ASSETS LIABILITIES INCOME EXPENSES Dec. 31, 2016 Dec. 31, 2016 2016 2015 2016 2015 Bank balances and short-term investments Banco Bradesco S.A.(***) - - - 351,086 - 312 Banco do Brasil S.A. 48,985 - 4,113 28,466 5 4 Borrowings (**), debentures (**) and derivatives (**) Banco Bradesco S.A.(***) - - - - - 85,505 Banco do Brasil S.A. - 4,257,562 800 - 463,949 459,889 Banco BNP Paribas Brasil S.A 5,126 - - - 67,196 8,978 Other financial transactions Banco Bradesco S.A.(***) - - - 166 - 4,174 Banco do Brasil S.A. - 962 234 80 6,408 5,941 Energy purchases and sales, and charges AES Tiete S.A. (****) - - 2 - 14,498 - Afluente Transmissão de Energia Elétrica S.A. - 53 - - 1,212 1,426 Aliança Geração de Energia S.A - 1,183 4 1 49,944 34,063 Alpargatas S.A. (****) - 2,954 - - - Arizona 1 Energia Renovável S.A - - - - 967 883 Baguari I Geração de Energia Elétrica S.A. - 6 - - 294 268 BRF Brasil Foods - - 20,190 - - - Caetite 2 Energia Renovável S.A. - - - - 889 810 Caetité 3 Energia Renovável S.A. - - - - 896 817 Calango 1 Energia Renovável S.A. - - - - 1,073 977 Calango 2 Energia Renovável S.A. - - - - 916 834 Calango 3 Energia Renovável S.A. - - - - 1,072 977 Calango 4 Energia Renovável S.A. - - - - 995 907 Calango 5 Energia Renovável S.A. - - - - 1,054 963 Companhia de Eletricidade do Estado da Bahia – COELBA 743 121 19,296 14,491 121 46 Companhia Energética de Pernambuco - CELPE 692 20 9,829 7,062 250 206 Companhia Energética do Rio Grande do Norte - COSERN 267 - 3,128 2,580 - - Companhia Hidrelétrica Teles Pires S.A. - 1,416 57 17 53,710 29,915 ELEB Equipamentos Ltda - - - 4,036 - - Embraer - - 6,938 26,615 - - Energética Águas da Pedra S.A. - 112 6 2 4,716 4,260 Estaleiro Atlântico Sul S.A. - - 7,978 19,026 - - Goiás Sul Geração de Enegia S.A. - - - - 181 166 InterCement Brasil S.A - - 2 1 - - Itapebi Geração de Energia S.A - - 3 1 - - Mel 2 Energia Renovável S.A. - - - - 718 632 NC ENERGIA S.A. 451 2 28,298 5,336 6 - Norte Energia S.A. 1 4,585 17 1 61,240 - Rio PCH I S.A. - 209 - - 8,865 8,004 Samarco Mineração S.A. - - 2 1 - - Santista Jeanswear S/A - - 13,600 4,491 - - Santista Work Solution S/A - - 2,224 - - - SE Narandiba S.A. - 2 - - 152 166 Serra do Facão Energia S.A. - SEFAC - 557 - - 23,153 20,916 Termopernambuco S.A. - - 5 3 - - ThyssenKrupp Companhia Siderúrgica do Atlântico - - 25,268 37,238 7,683 6,965 Tupy - - - - 27,127 - Vale Energia S.A. 8,680 - 102,069 92,353 216 695 Intangible assets, property, plant and equipment, materials and services rendered Alpargatas S.A. (***) 168 - 2,310 - - - Afluente Transmissão de Energia Elétrica S.A. - - - - 5 - Banco Bradesco S.A.(***) - - - - - 19 Banco do Brasil S A - - - - 6 170 Brasil veículos Companhia de Seguros - - 2 - - - BRF Brasil Foods - - 1,250 - - - Companhia de Saneamento Básico do Estado de São Paulo - SABESP 4 42 170 1,034 94 31 Companhia Brasileira de Soluções e Serviços CBSS - Alelo (***) - - - - - 576 Companhia de Eletricidade do Estado da Bahia – COELBA - - - - - 50 Concessionária Auto Raposo Tavares S.A. - CART - - - 15 - Concessionária de Rodovias do Oeste de São Paulo – ViaOeste S.A. - - - - 6 - Concessionária do Sistema Anhanguera - Bandeirante S.A. 86 - - - 10 9 Estaleiro Atlântico Sul S.A. - - 9 - - - Ferrovia Centro-Atlântica S.A. - - - - 24 22 HM 02 Empreendimento Imobiliário SPE Ltda. - - 45 - - - HM Engenharia e Construções S.A. - - - 272 - - Indústrias Romi S.A. 4 - 51 68 - - InterCement Brasil S.A - - 43 26 - - Oi Móvel S.A (***) - - - - 302 - Logum Logística S.A. 26 - 730 55 - - LUPATECH - - - - - 2 Mapfre Seguros Gerais S.A. (***) - - - 4 - 1 NC Energia S.A. - - 17 - - - Renovias Concessionária S.A. - - - - 17 - Rodovias Integradas do Oeste S.A. - - - 3 - SAMM - Sociedade de Atividades em Multimídia Ltda. - - 1,410 1,463 Santista Jeanswear S/A - 1 21 - - Tim Celular S.A. (***) 6 89 2,008 - 12 - TOTVS S.A. 2 2 - 32 44 Ultrafértil S.A - 14 868 - - Vale Energia S.A. - 331 - - - Vale S.A. - - - - 11 - Vale Fertilizantes S.A - - 45 - - (**) The balances include the mark to market adjustments (***) Related party until December 2015 (****) Related party from January 2016

(31) INSURANCE

(31) INSURANCE	12 Months Ended
	Dec. 31, 2017
Insurance [Abstract]
INSURANCE	The subsidiaries maintain insurance policies with coverage based on specialized advice and takes into account the nature and degree of risk. The amounts are considered sufficient to cover any significant losses on assets and/or responsibilities. Expenses related to coverages are as follows: Description Type of cover Dec. 31, 2017 Dec. 31, 2016 (*) 31/12/2015 (*) Concession financial asset / Intangible assets Fire, lightening, explosion, machinery breakdown, electrical damage and engineering risk 7,440,359 9,679,825 8,634,344 Transport National transport 302,364 416,358 319,834 Stored materials Fire, lightning, explosion and robbery 229,496 232,849 171,585 Automobiles Comprehensive cover 16,779 13,235 6,544 Civil liability Electric energy distributors 263,000 200,000 118,000 Personnel Group life and personal accidents 694,341 234,357 202,989 Others Operational risks and others 158,340 281,914 323,200 Total 9,104,679 11,058,537 9,776,496 (*) Information not audited by independent auditors For the civil liability insurance of the officers, the insured amount is shared among the companies of the CPFL Energia Group. The premium is paid individually by each company involved, and the gross revenue is the base for the apportionment criterion.

(32) RISK MANAGEMENT

(32) RISK MANAGEMENT	12 Months Ended
	Dec. 31, 2017
Risk Management
RISK MANAGEMENT	The business of the Group comprise mainly the generation, commercialization and distribution of electric energy. As public utilities concessionaires, the activities and/or tariffs of its principal subsidiaries are regulated by ANEEL. Risk management structure At CPFL Group, the risk management is conducted through a structure that involves the Board of Directors and Supervisory Board, Advisory Committees, Executive Board, Internal Audit and Corporate Risks Management and business areas. This management is regulated by the Corporate Risk Management Policy, which describes the risk management model as well as the attributions of each agent. The Board of Directors of CPFL Energia is responsible for deciding on the risk limit methodologies recommended by the Executive Board, and for being aware of the exposures and mitigation plans presented in the event these limits are exceeded. This forum is also responsible for being aware of and monitoring any important weaknesses in controls and/or processes, as well as relevant regulatory compliance failures, following up on the plans proposed by the Executive Board to correct them. The Advisory Committee(s) of the Board of Directors, in its role(s) of technical body(ies), is responsible for becoming aware of (i) the risk monitoring models, (ii) the exposures to risks, and (iii) the control levels (including their effectiveness), supporting the Board of Directors in the performance of its statutory role related to risk management. The Supervisory Board of CPFL Energia is responsible for, among other things, certifying that Management has means to identify the risks on the preparation and disclosure of the financial statements to which the CPFL Group is exposed as well as for monitoring the effectiveness of the control environment. The Executive Board of CPFL Energia is responsible for conducting businesses within the risk limits defined, and should take the required measures to avoid that the exposure to risks exceeds such limits and report any excess of the limit to the Board of Directors of CPFL Energia, presenting mitigation actions. The Internal Audit and Corporate Risks Management is responsible for coordinating the risk management process at CPFL Group, developing and keeping up-to-date Corporate Risk Management methodologies that involve the identification, measurement, monitoring and reporting of risks to which the CPFL Group is exposed. The business areas have the primary responsibility for the management of the risks inherent to its processes, and should conduct them within the exposure limits defined and implementing mitigation plans for the main exposures. The main market risk factors that affect the businesses are as follows: Foreign exchange risk: Interest rate risk and inflation indexes: Credit risk Risk of under/overcontracting from distributors: Market risk of commercialization companies: Risk of energy shortages The storage conditions of the National Interconnected System (“SIN”) allowed the energy generation through 2017, with no supply risk, despite the low storage levels in the Northeast sub-system. The improvement in SIN storage conditions, associated with the reduced demand verified during the year and the availability of thermoelectric power generation, significantly reduce the likelihood of additional load cuts. Risk of acceleration of debts Regulatory risk: Financial instruments risk management The Company and its subsidiaries maintain operating and financial policies and strategies to protect the liquidity, safety and profitability of their assets. Accordingly, control and follow-up procedures are in place as regards the transactions and balances of financial instruments, for the purpose of monitoring the risks and current rates in relation to market conditions. Risk management controls

(33) FINANCIAL INSTRUMENTS

(33) FINANCIAL INSTRUMENTS	12 Months Ended
	Dec. 31, 2017
Financial Instruments
FINANCIAL INSTRUMENTS	The main financial instruments, at fair value and/or the carrying amount is significantly different of the respective fair value, classified in accordance with the Group’s accounting practices, are: December 31, 2017 Note Category Measurement Level (*) Carrying amount Fair value Asset Cash and cash equivalent 5 (a) (2) Level 1 2,289,302 2,289,302 Cash and cash equivalent 5 (a) (2) Level 2 960,340 960,340 Derivatives 33 (a) (2) Level 2 595,872 595,872 Derivatives - zero-cost collar 33 (a) (2) Level 3 52,058 52,058 Concession financial asset - distribution 10 (b) (2) Level 3 6,330,681 6,330,681 10,228,253 10,228,253 Liability Borrowings - principal and interest 16 (c) (1) Level 2 (***) 6,142,583 5,912,175 Borrowings - principal and interest (**) 16 (a) (2) Level 2 4,849,474 4,849,474 Debentures - Principal and interest 17 (c) (1) Level 2 (***) 9,176,527 7,581,432 Derivatives 33 (a) (2) Level 2 94,806 94,806 20,263,390 18,437,887 (*) Refers to the hierarchy for determination of fair value (**) As a result of the initial designation of this financial liability, the consolidated financial statements reported a gain of R$ 21,137 in 2017 (a loss of R$ 274,834 in 2016) (***) Only for disclosure purposes, in accordance with IFRS 7 Key Category: Measurement: (a) - Measured at fair value through profit or loss (1) - Measured at amortized cost (b) - Available for sale (2) - Measured at fair value (c) - Other finance liabilities The financial instruments for which the carrying amounts approximate the fair values at the end of the reporting period, as they are either short term in nature, bear post fixed interest rates or are of a high credit rating are: · Financial assets: (i) consumers, concessionaires and licensees, (ii) leases, (iii) associates, subsidiaries and parent company, (iv) receivables – CDE, (v) concession financial asset - transmission, (vi) pledges, funds and restricted deposits, (vii) services rendered to third parties, (viii) Collection agreements, and (ix) sector financial asset. · Financial liabilities: (i) trade payables, (ii) regulatory charges, (iii) use of public asset, (iv) consumers and concessionaires payable, (v) FNDCT/EPE/PROCEL, (vi) collection agreement, (vii) reversal fund, (viii) payables for business combination, (ix) tariff discount CDE, and (x) sector financial liability. In addition, in 2017 there were no transfers between hierarchical levels of fair value. a) Valuation of financial instruments As mentioned in note 4, the fair value of a security corresponds to its maturity value (redemption value) adjusted to present value by the discount factor (relating to the maturity date of the security) obtained from the market interest curve, in Brazilian reais. IFRS 7 requires the classification in a three-level hierarchy for fair value measurement of financial instruments, based on observable and unobservable inputs related to the valuation of a financial instrument at the measurement date. IFRS 7 also defines observable inputs as market data obtained from independent sources and unobservable inputs that reflect market assumptions. The three levels of the fair value hierarchy are: · Level 1: quoted prices in an active market for identical instruments; · Level 2: observable inputs other than quoted prices in an active market that are observable for the asset or liability, directly ( i.e. i.e. · Level 3: inputs for the instruments that are not based on observable market data. As the distribution subsidiaries have classified their concession financial asset as available-for-sale, the relevant factors for fair value measurement are not publicly observable. The fair value hierarchy classification is therefore level 3. The changes between years and the respective gains in profit for the year of R$204,443 (R$ 186,148 in 2016 and R$ 393,343 in 2015), and the main assumptions are described in note 10 and 25. Additionally, the main assumptions used in the fair value measurement of the zero-cost collar derivative, the fair value hierarchy of which is Level 3, are disclosed in note 33 b.1. The Company recognizes in “Investments at cost” in the financial statements the 5.94% interest held by the indirect subsidiary Paulista Lajeado Energia S.A. in the total capital of Investco S.A. (“Investco”), in the form of 28,154,140 common shares and 18,593,070 preferred shares not quoted in stock markets. The main objective of its operations is to generate electric energy for commercialization by the shareholders holding the concession. The Company recognizes the investment at cost. b) Derivatives The Group has the policy of using derivatives to reduce their risks of fluctuations in exchange and interest rates, without any speculative purposes. The Group has exchange rate derivatives compatible with the exchange rate risks net exposure, including all the assets and liabilities tied to exchange rate changes. The derivative instruments entered into by the Group are currency or interest rate swaps with no leverage component, margin call requirements or daily or periodical adjustments. Furthermore, in 2015 subsidiary CPFL Geração contracted a zero-cost collar (see item b.1 below). As a large part of the derivatives entered into by the subsidiaries have their terms fully aligned with the hedged debts, and in order to obtain more relevant and consistent accounting information through the recognition of income and expenses, these debts were designated at fair value, for accounting purposes (note 16). Other debts with terms different from the derivatives contracted as a hedge continue to be recognized at amortized cost. Furthermore, the Group did not adopt hedge accounting for derivative instruments. At December 31, 2017, the Group had the following swap transactions, all traded on the over-the-counter market: Fair values (carrying amounts) Company / strategy / counterparts Assets Liabilities Fair value, net Values at Gain (loss) on marking to market Currecy / index Maturity range Notional Derivatives to hedge debts designated at fair value Exchange rate hedge CPFL Paulista Bank of Tokyo-Mitsubishi 34,627 - 34,627 35,864 (1,237) dollar March 2019 117,400 Bank of America Merrill Lynch 42,466 - 42,466 42,830 (363) dollar September 2018 106,020 Bank of America Merrill Lynch 48,135 - 48,135 48,802 (667) dollar March 2019 116,600 J.P.Morgan 24,067 - 24,067 24,401 (334) dollar March 2019 58,300 J.P.Morgan 13,808 - 13,808 13,659 149 dollar January 2019 67,613 Bank of Tokyo-Mitsubishi 14,124 - 14,124 22,015 (7,891) dollar February 2020 142,735 Bank of America Merrill Lynch 89,684 - 89,684 89,289 395 dollar February 2018 405,300 Bank of America Merrill Lynch - (5,236) (5,236) (1,653) (3,583) dollar October 2018 329,500 Bradesco - (5,163) (5,163) (4,068) (1,095) dollar May 2021 59,032 Bank of America Merrill Lynch - (4,805) (4,805) (4,055) (750) dollar May 2021 59,032 Citibank - (4,971) (4,971) (4,062) (910) dollar May 2021 59,032 Citibank - (4,948) (4,948) (4,080) (868) dollar May 2021 59,032 266,911 (25,124) 241,787 258,941 (17,154) CPFL Piratininga Citibank 45,457 - 45,457 47,966 (2,509) dollar March 2019 117,250 Bradesco 27,046 - 27,046 27,257 (211) dollar April 2018 55,138 J.P.Morgan 27,050 - 27,050 27,259 (209) dollar April 2018 55,138 Citibank 30,880 - 30,880 35,979 (5,099) dollar January 2020 169,838 BNP Paribas 37,212 - 37,212 36,649 563 euro January 2018 175,714 Bradesco - (5,163) (5,163) (4,068) (1,095) dollar May 2021 59,032 Bank of America Merrill Lynch - (4,805) (4,805) (4,055) (750) dollar May 2021 59,032 Citibank - (4,971) (4,971) (4,062) (910) dollar May 2021 59,032 Bank of America Merrill Lynch - (2,339) (2,339) (2,035) (304) dollar May 2021 29,516 Citibank - (2,474) (2,474) (2,040) (434) dollar May 2021 29,516 167,645 (19,753) 147,891 158,850 (10,959) RGE Bank of Tokyo-Mitsubishi 22,785 - 22,785 23,054 (270) dollar April 2018 36,270 Bank of Tokyo-Mitsubishi 101,289 - 101,289 102,467 (1,178) dollar May 2018 168,346 Bank of Tokyo-Mitsubishi 374 - 374 1,313 (939) dollar October 2018 169,260 Bradesco - (5,163) (5,163) (4,068) (1,095) dollar May 2021 59,032 Bank of America Merrill Lynch - (4,805) (4,805) (4,055) (750) dollar May 2021 59,032 Citibank - (4,971) (4,971) (4,062) (910) dollar May 2021 59,032 Bank of America Merrill Lynch - (4,678) (4,678) (4,070) (609) dollar May 2021 59,032 124,448 (19,619) # 104,829 110,579 (5,750) Companhia Jaguari de Energia (CPFL Santa Cruz) Scotiabank - (1,167) (1,167) (1,327) 160 dollar July 2019 65,936 CPFL Paulista Lajeado Itaú 598 - 598 557 41 dollar March 2018 35,000 CPFL Brasil Scotiabank - (1,537) (1,537) (1,608) 71 dollar August 2018 45,360 Scotiabank 6,243 - 6,243 10,610 (4,367) dollar September 2020 249,989 Scotiabank 3,964 - 3,964 6,674 (2,709) dollar October 2020 150,011 10,208 (1,537) # 8,671 15,676 (7,005) CPFL Geração Scotiabank - (2,070) (2,070) (2,355) 286 dollar July 2019 117,036 Votorantim - (5,339) (5,339) (5,316) (23) dollar June 2019 104,454 Bradesco - (103) (103) 433 (536) dollar September 2019 32,636 Citibank - (10,985) (10,985) (613) (10,372) dollar September 2020 397,320 Scotiabank - (9,110) (9,110) (9,278) 167 dollar December 2019 174,525 - (27,607) (27,607) (17,129) (10,478) Subtotal 569,809 (94,806) 475,004 526,148 (51,145) Derivatives to hedge debts not designated at fair value Price index hedge CPFL Geração Santander 10,263 - 10,263 8,344 1,919 IPCA April 2019 35,235 J.P.Morgan 10,263 - 10,263 8,344 1,919 IPCA April 2019 35,235 20,525 - 20,525 16,688 3,837 Interest rate hedge (1) CPFL Paulista J.P.Morgan 1,112 - 1,112 255 857 CDI February 2021 300,000 Votorantim 380 - 380 87 293 CDI February 2021 100,000 Santander 401 - 401 92 309 CDI February 2021 105,000 1,893 - 1,893 434 1,459 CPFL Piratininga Votorantim 536 - 536 122 414 CDI February 2021 135,000 Santander 402 - 402 91 310 CDI February 2021 100,000 938 - 938 213 724 RGE Votorantim 620 - 620 143 477 CDI February 2021 170,000 CPFL Geração Votorantim 2,088 - 2,088 403 1,685 CDI August 2020 460,000 Subtotal 26,063 - 26,063 17,881 8,182 Other derivatives (2) CPFL Geração Itaú 18,126 - 18,126 - 18,126 dollar September 2020 19,975 Votorantim 14,948 - 14,948 - 14,948 dollar September 2020 19,975 Santander 18,984 - 18,984 - 18,984 dollar September 2020 25,248 Subtotal 52,058 - 52,058 - 52,058 Total 647,930 (94,806) 553,124 544,029 9,095 Current 444,029 (10,230) Noncurrent 203,901 (84,576) For further details on terms and information on debts and debentures, see notes 16 and 17 (1) The interest rate hedge swaps have half-yearly validity, so the notional value reduces according to the amortization of the debt. (2) Due to the characteristics of this derivative (zero-cost collar), the notional amount is presented in U.S. dollar (3)The values at cost are the derivative amount without the respective mark to market, while the notional refers to the contracted accrual. December 31, 2016 Interests and monetary restatements Repayments of principal December 31, 2017 Derivatives to hedge debts designated at fair value 602,476 (189,466) 113,138 526,148 to hedge debts not designated at fair value 7,181 (1,175) 11,875 17,881 Others (zero-cost collar) - 22,372 (22,372) - Mark-to-market (*) 76,679 (67,584) - 9,095 686,336 (235,853) 102,641 553,124 (*) The effects on profit or loss for the year ended December 31, 2017 related to the fair value adjustments (MTM) of the derivatives are: (i) a loss of R$ 75,649 for debts designated at fair value, (ii) a gain of R$ 13,722 for debts not designated at fair value and (iii) a loss of R$ 5,657 for other derivatives (zero-cost collar). As mentioned above, certain subsidiaries applied the fair value hedge to some of its financial instruments and as a result debts were marked to market (note 16). The Group have recognized gains and losses on their derivatives. However, as these derivatives are used as a hedge, these gains and losses minimized the impact of variations in exchange and interest rates on the hedged debts. For the years 2017, 2016 and 2015, the derivatives resulted in the following impacts on the result, recognized in the line item of finance costs on adjustment for inflation and exchange rate changes: Gain (Loss) Company Hedged risk / transaction 2017 2016 2015 CPFL Energia Exchange variation - (76,202) 71,492 CPFL Energia Mark to Market - 2,319 (2,319) CPFL Paulista Interest rate variation 304 (1,423) (2,250) CPFL Paulista Exchange variation (89,612) (802,479) 843,224 CPFL Paulista Mark to Market (25,410) 118,663 (98,738) CPFL Piratininga Interest rate variation 175 (661) (609) CPFL Piratininga Exchange variation (19,799) (358,412) 300,652 CPFL Piratininga Mark to Market (18,999) 48,193 (32,431) RGE Interest rate variation 115 (835) (1,321) RGE Exchange variation (27,237) (252,321) 291,612 RGE Mark to Market (10,679) 48,915 (29,946) CPFL Geração Interest rate variation 852 3,161 2,600 CPFL Geração Exchange variation (41,793) (145,933) 122,294 CPFL Geração Mark to Market (6,033) 66,425 (7,896) CPFL Santa Cruz Exchange variation (947) (6,986) 9,899 CPFL Santa Cruz Mark to Market 120 148 (80) CPFL Leste Paulista Exchange variation (947) (1,076) 4,596 CPFL Leste Paulista Mark to Market 120 (80) (76) CPFL Sul Paulista Exchange variation (947) (7,577) 12,404 CPFL Sul Paulista Mark to Market 120 170 (83) CPFL Jaguari Exchange variation (947) (10,236) 16,616 CPFL Jaguari Mark to Market 120 273 (63) CPFL Mococa Exchange variation - - 2,022 CPFL Mococa Mark to Market - - (33) Paulista Lajeado Exchange variation (2,052) (11,046) 4,626 Paulista Lajeado Mark to Market 66 1,649 (1,675) CPFL Telecom Exchange variation - - 3,204 CPFL Telecom Mark to Market - - 6 CPFL Brasil Exchange variation 14,567 (13,857) 5,367 CPFL Brasil Mark to Market (7,009) 2,383 (2,378) CPFL Serviços Exchange variation - (3,420) 3,810 CPFL Serviços Mark to Market - 254 (87) (235,852) (1,399,988) 1,514,439 b.1) Zero-cost collar derivative contracted by CPFL Geração In 2015, subsidiary CPFL Geração contracted US$ denominated put and call options, involving the same financial institution as counterpart, and which on a combined basis are characterized as an operation usually known as zero-cost collar. The contracting of this operation does not involve any kind of speculation, inasmuch as it is aimed at minimizing any negative impacts on future revenues of the joint venture ENERCAN, which has electric energy sale agreements with annual restatement of part of the tariff based on the variation in the US$. In addition, according to Management’s view, the scenario in 2015 was favorable for contracting this type of financial instrument, considering the high volatility implicit in dollar options and the fact that there is no initial cost for same. The total amount contracted was US$ 111,817, with due dates between October 1, 2015 and September 30, 2020. As at December 31, 2017, the total amount contracted was US$ 65,197, considering the options already settled up to date. The exercise prices of the dollar options vary from R$ 4.20 to R$ 4.40 for the put options and from R$ 5.40 to R$ 7.50 for the call options. These options have been measured at fair value in a recurring manner, as required by IAS 39. The fair value of the options that are part of this operation has been calculated based on the following premises: Valuation technique(s) and key information We used the Black Scholes Option Pricing Model, which aims to obtain the fair price of the options involving the following variables: value of the asset, exercise price of the option, interest rate, term and volatility. Significant unobservable inputs Volatility determined based on the average market pricing calculations, future dollar and other variables applicable to this specific transaction, with average variation of 19.65%. Relationship between unobservable inputs and fair value (sensitivity) A slight rise in long-term volatility, analyzed on an isolated basis, would result in an insignificant increase in fair value. If the volatility were 10% higher and all the other variables remained constant, the net carrying amount (asset) would increase by R$ 477, resulting in a net asset of R$ 51,581. The following table reconciles the opening and closing balances of the call and put options for the year ended December 31, 2017, as required by IFRS 13: Assets Liabilities Net As of December 31, 2015 8,820 (2,440) 6,380 Measurement at fair value 65,546 2,440 67,986 Net cash received from settlement of flows (16,651) - (16,651) As of December 31, 2016 57,715 - 57,715 Measurement at fair value 16,715 - 16,715 Net cash received from settlement of flows (22,372) - (22,372) As of December 31, 2017 52,058 - 52,058 The fair value measurement of these financial instruments was recognized as finance income in the statement of profit or loss for the year, and no effects were recognized in other comprehensive income. c) Sensitivity Analysis In compliance with IFRS 7, the Group performed sensitivity analyses of the main risks to which their financial instruments (including derivatives) are exposed, mainly comprising variations in exchange and interest rates, as shown below. If the risk exposure is considered an asset, the risk to be taken into account is a reduction in the pegged indexes, resulting in a negative impact on the results of the Group. Similarly, if the risk exposure is considered a liability, the risk is of an increase in the pegged indexes and the consequent negative effect on the results. The Group therefore quantify the risks in terms of the net exposure of the variables (dollar, euro, CDI, IGP-M, IPCA, TJLP and SELIC), as shown below: c.1) Exchange rate variation Considering the level of net exchange rate exposure at December 31, 2017 is maintained, the simulation of the effects by type of financial instrument for three different scenarios would be: Decrease (increase) Instruments Exposure Risk Currency depreciation (b) Currency appreciation / depreciation of 25% (c) Currency appreciation / depreciation of 50% (c) Financial liability instruments (4,641,924) (209,785) 1,003,142 2,216,070 Derivatives - Plain Vanilla Swap 4,687,768 211,857 (1,013,050) (2,237,956) 45,844 drop in the dollar 2,072 (9,908) (21,886) Financial liability instruments (218,814) (14,978) 43,470 101,918 Derivatives - Plain Vanilla Swap 219,694 15,038 (43,645) (102,328) 880 drop in the euro 60 (175) (410) Total 46,724 2,132 (10,083) (22,296) Decrease (increase) Instruments Exposure Risk Currency depreciation (b) Currency appreciation / depreciation of 25%(c) Currency appreciation / depreciation of 50%(c) Derivatives - Zero-cost collar 65,197 (d) dollar apprec. (56,138) (80,491) (104,844) (a) The exchange rates considered as of December 31, 2017 were R$ 3,31 per US$ 1.00 and R$ 3,97 per € 1.00. (b) As per the exchange curves obtained from information made available by B3 S.A., with the exchange rate being considered at R$ 3,46 and R$ 4,24, and exchange depreciation at 4,52% and 6,85%, for the US$ and €, respectively. (c) As required by CVM Instruction 475/2008, the percentage increases in the ratios applied refer to the information made available by the B3 S.A.. (d) Owing to the characteristics of this derivative (zero-cost collar), the notional amount is presented in US$. Except for the zero cost collar, based on the net exchange exposure in US$ and euro being an asset, the risk is a drop in the dollar and euro and, therefore, the local exchange rate is appreciated by 25% and 50% in relation to the probable exchange rate. c.2) Interest rate variation Assuming that (i) the scenario of net exposure of the financial instruments indexed to variable interest rates at December 31, 2017 is maintained, and (ii) the respective accumulated annual indexes for 2017 remain stable (CDI 6.89% p.a.; IGP-M -0.52% p.a.; TJLP 7.00% p.a.; IPCA 2.76% p.a. and SELIC 9.70% p.a.), the effects on the Company’s 2017 financial statements would be a net finance cost of R$ 764,150 (CDI R$ 669,661, TJLP R$276,141 and income of SELIC R$ 36,609, IGPM R$298 and IPCA R$ 141,152). In the event of fluctuations in the indexes in accordance with the three scenarios described below, the effect on net finance cost would as follows: Decrease (increase) Instruments Exposure Risk Scenario I (a) Raise/drop of Raise/drop of Financial asset instruments 3,770,045 (3,016) 61,169 125,354 Financial liability instruments (8,988,008) 7,190 (145,830) (298,851) Derivatives - Plain Vanilla Swap (4,501,345) 3,601 (73,034) (149,670) (9,719,308) CDI apprec. 7,775 (157,695) (323,167) Financial liability instruments (57,291) IGP-M apprec. (2,286) (2,783) (3,280) Financial liability instruments (3,944,876) TJLP apprec. 9,862 (56,708) (123,277) Financial liability instruments (1,311,432) (14,557) (1,869) 10,819 Derivatives - Plain Vanilla Swap 94,949 1,054 135 (783) Concession financial asset 6,330,681 70,271 9,021 (52,228) 5,114,198 drop in the IPCA 56,768 7,287 (42,192) Sector financial asset and liability 517,341 (14,692) (23,565) (32,437) Financial liability instruments (139,926) 3,974 6,374 8,773 377,415 drop in the SELIC (10,718) (17,191) (23,664) Total (8,229,862) 61,401 (227,090) (515,580) (a) The CDI, IGP-M, TJLP, IPCA and SELIC indexes considered of 6.81%, 3.47%, 6.75%, 3.87% and 6.86%, respectively, were obtained from information available in the market. (b) In compliance with CVM Instruction 475/08, the percentage of raise/drop of indexes were applied to Scenario I indexes. d) Liquidity analysis The Company manages liquidity risk by continuously monitoring forecast and actual cash flows, and by matching the maturity profiles of its financial liabilities. The table below sets out details of the contractual maturities of the financial liabilities at December 31, 2017, taking into account principal and future interest, and is based on the undiscounted cash flow, considering the earliest date on which the Group have to settle their respective obligations. December 31, 2017 Note Weighted average interest rates Less than 1 month 1-3 months 3 months to 1 year 1-3 years 4-5 years More than 5 years Total Trade payables 15 3,524,624 16,307 7,418 - - 128,438 3,676,787 Borrowings - principal and interest 16 7.95% p.a. 336,255 947,051 2,904,702 5,267,176 1,485,520 2,421,543 13,362,247 Derivatives 33 39 523 14,160 32,258 59,801 - 106,781 Debentures - principal and interest 17 7.83% p.a. 35,930 544,995 1,541,223 5,378,610 1,938,783 1,350,776 10,790,317 Regulatory charges 19 581,600 - - - - - 581,600 Use of public asset 9.24% p.a. 1,645 3,305 14,979 42,579 46,788 149,061 258,357 Others 22 106,515 56,186 18,212 - - 62,223 243,136 Consumers and concessionaires 60,298 25,844 6,926 - - 44,473 137,541 EPE / FNDCT / PROCEL 849 3,226 11,286 - - - 15,361 Collections agreement 45,368 27,116 - - - - 72,484 Reversal fund - - - - - 17,750 17,750 Total 4,586,608 1,568,367 4,500,694 10,720,623 3,530,892 4,112,041 29,019,225 f) Credit risk Cash, cash equivalents and derivatives are held with banks and financial institutions with rating AA-. The credit risk on operations of Consumers, Concessionaires and Licensees is derived from the exposure to financial losses resulting from non-compliance with financial obligations by the counterparties. Monthly, the risk is monitored and classified according to the current exposure, considering the limit approved by Management.

(34) COMMITTMENTS

(34) COMMITTMENTS	12 Months Ended
	Dec. 31, 2017
Committments
COMMITTMENTS	The Group’s commitments at December 31, 2017 are as follows: Commitments at December 31, 2017 Duration Less than 1 year 1-3 years 4-5 years More than 5 years Total Operational leasings Up to 15 years 16,579 29,440 25,053 155,169 226,241 Energy purchase agreements (except Itaipu) Up to 28 years 10,870,752 18,433,971 17,250,704 41,537,486 88,092,913 Energy purchase from Itaipu Up to 28 years 2,281,157 4,564,825 4,478,641 13,133,756 24,458,379 Energy system service charges Up to 32 years 2,613,587 5,758,898 6,599,478 17,997,838 32,969,801 GSF renegotiation Up to 30 years 26,997 13,267 47,284 276,207 363,755 Power plant constrution projects Up to 3 years 97,176 11,319 - - 108,495 Trade payables Up to 17 years 102,441 237,673 244,851 1,005,781 1,590,746 Total 16,008,689 29,049,391 28,646,012 74,106,237 147,810,330 The power plant construction projects include commitments made by the renewal energy subsidiaries for construction.

(35) NON-CASH TRANSACTION

(35) NON-CASH TRANSACTION	12 Months Ended
	Dec. 31, 2017
Non-cash Transaction
NON-CASH TRANSACTION	Dec 31, 2017 Dec 31, 2016 Dec 31, 2015 Transactions resulting from business combinations Borrowings and debentures - (1,156,621) - Concession financial asset (12,338) 876,281 - Intangible assets (22,165) 1,870,268 - Property, plant and equipment (4,800) - - Other net assets acquired - 1,911 - (39,303) 1,591,839 - Cash and cash equivalents acquired in the business combination - (95,164) - Consideration paid in the acquisition, net (39,303) 1,496,675 - Other transactions Capital increase through earnings reserve - 392,272 554,888 Escrow deposits to property, plant and equipment 4 3,418 - Interest capitalized in property, plant and equipment 29,817 54,733 34,212 Interest capitalized in concession financial asset - distribution infrastructure 20,726 13,349 11,358 Reversal of contingencies against intangible assets - 7,591 - Repayment of intercompany loans with noncontrolling shareholders' dividends 259 - - Provision for socio environmental costscapitalized in property, plant and equipment 41,213 - - Transfers between property, plant and equipment and other assets 32,600 14,592 2,928 The balances disclosed in the "Transactions resulting from business combination" lines refer to the complementary amounts related to the acquisition of RGE Sul, which was provisionally recorded at December 31, 2016, according to note 14.3.

(36) RELEVANT FACT AND EVENTS A

(36) RELEVANT FACT AND EVENTS AFTER THE REPORTING PERIOD	12 Months Ended
	Dec. 31, 2017
Relevant Fact And Events After Reporting Period
RELEVANT FACT AND EVENTS AFTER THE REPORTING PERIOD	36.1 Issue of debentures In January 2018, subsidiaries issued simple non-convertible debentures with the following conditions and details: Subsidiary Issue Quantity issued R$ thousand Maturity Interest Utilization CPFL Paulista 9th issue – single series 1,380,000 1,380,000 January 2021 Semiannual Working capital improvement CPFL Piratininga 9th issue – single series 215,000 215,000 January 2021 Semiannual Working capital improvement RGE 9th issue – single series 220,000 220,000 January 2021 Semiannual Working capital improvement CPFL Santa Cruz 2nd issue – single series 190,000 190,000 January 2021 Semiannual Working capital improvement CPFL Geração 10th issue – single series 190,000 190,000 December 2018 Semiannual Working capital improvement CPFL Brasil 4th issue – single series 115,000 115,000 January 2019 Semiannual Working capital improvement RGE Sul 6th issue – single series 520,000 (*) 300,000 December 2020 Semiannual Working capital improvement 2,610,000 36.2 RGE and RGE Sul concession grouping In March 2018, we requested ANEEL an application of requesting the grouping of the concessions of distributors RGE Sul and RGE in a single concession agreement, being RGE Sul the incorporating company and RGE the incorporated company. The implementation of the grouping of the concessions shall depend on ANEEL’s authorization, as well as on the deliberation and approval by the competent bodies of RGE Sul and RGE.

(37) CONDENSED UNCONSOLIDATED F

(37) CONDENSED UNCONSOLIDATED FINANCIAL INFORMATION	12 Months Ended
	Dec. 31, 2017
Condensed Unconsolidated Financial Information
CONDENSED UNCONSOLIDATED FINANCIAL INFORMATION	Since the condensed unconsolidated financial information required by Rule 12-04 of Regulation S-X is not required under IFRS issued by the International Accounting Standards Board - IASB, such information was not included in the original financial statements filed with the Brazilian Securities and Exchange Commissions – CVM. In order to attend the specific requirements of the Securities and Exchange Commission (the “SEC”), Management has incorporated the condensed unconsolidated information in these financial statements as part of the Form 20-F. The condensed unconsolidated financial information of CPFL Energia, as of December 31, 2017 and December 31, 2016 and for the years ended on December 31, 2017, 2016 and 2015 presented herein was prepared considering the same accounting policies as described in note 3 to Company’s consolidated financial statements. UNCONSOLIDATED STATEMENTS OF FINANCIAL POSITION ASSETS December 31, 2017 December 31, 2016 Cash and cash equivalents 6,581 64,973 Dividends and interest on capital 204,807 642,978 Other receivables 63,993 83,065 Total current assets 275,382 791,016 Deferred tax assets 145,779 171,073 Investments 8,557,673 7,866,100 Other receivables 484,814 80,775 Total noncurrent assets 9,188,266 8,117,948 Total assets 9,463,648 8,908,964 LIABILITIES December 31, 2017 December 31, 2016 Debentures 1,938 15,334 Dividends and interest on capital 281,919 218,630 Other payables 19,955 21,791 Total current liabilities 303,812 255,755 Debentures 184,388 612,251 Provision for tax, civil and labor risks 600 1,008 Allowance for equity investment losses - 19,302 Other payables 13,320 50,628 Total noncurrent liabilities 198,308 683,188 Equity 8,961,528 7,970,021 Total liabilities and equity 9,463,648 8,908,964 UNCONSOLIDATED STATEMENTS OF PROFIT OR LOSS FOR THE YEAR 2017 2016 2015 Net operating revenue 1 1,713 1,157 General and administrative expenses (42,771) (50,860) (29,911) Income from electric energy service (42,770) (49,147) (28,754) Equity interests in subsidiaries, associates and joint ventures 1,349,766 922,362 926,951 Finance income (expenses) (56,471) 17,183 (22,948) Profit before taxes 1,250,525 890,398 875,250 Social contribution and income tax (70,775) 10,487 (10,309) Profit for the year 1,179,750 900,885 864,940 2017 2016 2015 Profit for the year 1,179,750 900,885 864,940 Items that will not be reclassified subsequently to profit and loss Equity in comprehensive income of subsidiaries 96,000 (394,175) 65,547 Total comprehensive income for the year 1,275,750 506,709 930,488 UNCONSOLIDATED STATEMENTS OF CASH FLOWS FOR THE YEAR 2017 2016 2015 OPERATING CASH FLOW Profit before taxes 1,250,525 890,398 875,250 ADJUSTMENT TO RECONCILE PROFIT TO CASH FROM OPERATING ACTIVITIES Depreciation and amortization 217 193 170 Provision for tax, civil and labor risks 61 425 1,497 Interest on debts, inflation adjustment and exchange rate changes 61,520 42,395 94,588 Equity interests in subsidiaries, associates and joint ventures (1,349,766) (922,362) (926,951) (37,443) 11,049 44,553 DECREASE (INCREASE) IN OPERATING ASSETS AND LIABILITIES Dividends and interest on capital received 1,172,336 1,606,073 627,014 Taxes recoverable 65,182 3,261 (12,350) Other operating assets and liabilities (19,043) 8,459 (2,526) CASH FLOWS PROVIDED BY OPERATIONS 1,181,032 1,628,842 656,691 Interest paid on debts and debentures (71,844) (45,470) (36,858) Income tax and social contribution paid (47,438) (27,117) (2,172) NET CASH FROM OPERATING ACTIVITIES 1,061,750 1,556,255 617,661 INVESTING ACTIVITIES Capital increase in investees (9,400) - (490,010) Advance for future capital increases (383,340) (1,384,520) (52,680) Other investing activities (72,435) (42,178) 10,298 NET CASH USED IN INVESTING ACTIVITIES (465,175) (1,426,698) (532,392) FINANCING ACTIVITIES Borrowings and debentures raised - 609,060 829,997 Repayment of principal of borrowings and debentures (434,000) (888,408) (1,290,000) Repayment of derivatives - (4,711) - Dividends and interest on capital paid (220,966) (204,717) (850) NET CASH GENERATED BY (USED IN) FINANCING ACTIVITIES (654,966) (488,776) (460,853) NET INCREASE IN CASH AND CASH EQUIVALENTS (58,390) (359,219) (375,584) CASH AND CASH EQUIVALENTS AT THE BEGINNING OF THE YEAR 64,973 424,192 799,775 CASH AND CASH EQUIVALENTS AT THE END OF THE YEAR 6,581 64,973 424,192 Following is the information relating to CPFL Energia's unconsolidated condensed financial statements presented above: a. Cash and cash equivalents: December 31, 2017 December 31, 2016 Bank balances 508 426 Investment funds 6,073 64,548 Total 6,581 64,973 Amounts invested in an Investment funds, involving investments subject to floating rates tied to the CDI in federal government bonds, CDBs, secured debentures of major financial institutions, with daily liquidity, low credit risk and interest equivalent, on average, to 101% of CDI. b. Dividends and interest on equity: Dividend Interest on own capital Total Subsidiary December 31, 2017 December 31, 2016 December 31, 2017 December 31, 2016 December 31, 2017 December 31, 2016 CPFL Paulista 49,798 - 49,798 - CPFL Piratininga - 72,080 - - - 72,080 CPFL Sul Paulista (*) - 8,641 - 1,986 - 10,627 Companhia Jaguari de Energia (CPFL Santa Cruz) 24,918 6,115 13,960 - 38,878 6,115 RGE 50,319 24,672 - - 50,319 24,672 CPFL Geração - 396,086 - - - 396,086 CPFL Centrais Geradoras 17 - - 17 - CPFL Jaguari Geração - 1,664 - - - 1,664 CPFL Brasil 20,748 86,020 2,361 1,650 23,109 87,671 CPFL Planalto 888 - - - 888 - CPFL Atende 1,003 1,953 620 554 1,623 2,507 Nect 4,348 5,600 - - 4,348 5,600 CPFL Eficiência Energética 12,195 9,565 17,404 16,325 29,599 25,891 AUTHI 6,228 10,064 - - 6,228 10,064 170,461 622,459 34,344 20,516 204,807 642,978 (*) At December 31, 2017 the companies were group in Companhia Jaguari de Energia (note 14.4.2). c. Other receivables: Current Noncurrent December 31, 2017 December 31, 2016 December 31, 2017 December 31, 2016 Income tax and social contribution recoverable 17,051 53,246 - - Other taxes recoverable 46,699 29,590 - - Associates and subsidiaries - - 127,147 52,582 Escrow deposits - - 665 710 Advance for future capital increase - - 350,000 - Loans and financing guarantees of subsidiaries - - 5,761 26,261 Others 243 229 1,241 1,223 Total 63,993 83,064 484,814 80,775 As at December 31, 2017, the balance of advance for future capital increase comprised advances to CPFL Paulista in the amount of R$350,000. d. Deferred tax assets December 31, 2017 December 31, 2016 Social contribution credit (debit) Tax losses carryforwards 38,216 42,841 Temporarily nondeductible differences (408) 1,125 Subtotal 37,808 43,966 Income tax credit (debit) Tax losses carryforwards 109,103 123,980 Temporarily nondeductible differences (1,132) 3,126 Subtotal 107,971 127,106 Total 145,779 171,073 e. Investment: The financial information of subsidiaries and joint ventures are accounted for using the equity method of accounting. Number of shares (thousand) December 31, 2017 December 31, 2016 2017 2016 2015 Investment Equity interest Share of profit (loss) of investees CPFL Paulista 880,653 1,370,403 1,063,400 280,354 255,329 298,203 CPFL Piratininga 53,096,770 461,059 355,755 152,080 68,114 211,637 CPFL Santa Cruz - - 140,520 23,447 23,797 12,424 CPFL Leste Paulista - - 52,853 9,589 10,731 13,556 CPFL Sul Paulista - - 58,895 10,545 8,455 16,201 CPFL Jaguari 359,058 340,463 30,255 11,720 7,988 4,852 CPFL Mococa - - 33,824 6,999 9,198 6,679 RGE 1,019,790 1,680,334 1,614,320 117,700 102,647 145,804 RGE Sul 527,266 1,228,317 - 57,305 - - CPFL Geração 205,492,020 2,354,115 2,158,384 594,026 401,148 240,520 CPFL Jaguari Geração (*) 40,108 50,970 45,099 15,709 6,655 6,670 CPFL Brasil 3,000 96,093 109,054 94,455 104,235 81,929 CPFL Planalto (*) 630 3,293 2,101 3,550 2,476 1,830 CPFL Serviços 1,577,706 105,105 97,968 (12,863) (8,175) (17,952) CPFL Atende (*) 13,991 19,338 17,150 7,128 5,833 7,776 Nect (*) 2,059 15,515 10,295 17,392 13,424 18,155 CPFL Total (*) 9,005 20,624 27,570 20,865 12,817 5,836 CPFL Jaguariúna (*) - - 1,256,161 (8,360) (35,498) (167) CPFL Telecom 86,420 2,018 (19,302) (14,021) (33,333) (60,718) CPFL Centrais Geradoras (*) 16,128 16,177 15,459 735 (958) 4,740 CPFL Eficiência Energética 48,164 55,252 61,543 (2,582) 5,926 35,194 Authi (*) 10 18,694 16,810 24,912 24,264 2,537 Subtotal - By subsidiary's equity 7,837,770 7,148,112 1,410,685 985,074 1,035,703 Amortization of fair value adjustments of assets - - (60,918) (62,713) (108,754) Total 7,837,770 7,148,112 1,349,766 922,362 926,950 Investment 7,804,429 5,811,894 Advances for future capital increases 33,340 1,355,520 Allowance for equity investment losses - (19,302) (*) number of quotas Dividends received The net cash provided by operating activities is comprised mainly by dividends received from the Company’s subsidiaries. After the decisions made by the subsidiaries’ shareholders at their Annual and Extraordinary General Meetings (AGM/EGM), in 2017 the Company recognized the amount of R$ 358,891 by way of dividends and interest on capital for the year 2016. The subsidiaries also declared in 2017: (i) interim dividends and interest on capital of R$ 277,612, related to interim profit of 2017; and (ii) R$ 280,191 as minimum mandatory dividend receivable related to 2017. From the balance of dividends and interest on capital receivable as at December 31, 2016, R$ 12,164 was rectified during 2017. Of the amounts recorded as receivables, the amount of R$1,172,336 was paid to the Company by the subsidiaries in 2017. The dividends received are comprised as follows: 2017 2016 2015 CPFL Paulista 2,228 948,624 425,400 CPFL Piratininga 112,638 267,647 - CPFL Santa Cruz 8,427 40,009 - CPFL Leste Paulista 4,449 9,242 - CPFL Jaguari - 1,291 806 CPFL Mococa - 7,991 - RGE 24,672 172,432 113,012 CPFL Geração 779,533 110,532 - CPFL Brasil 166,695 1,601 52,599 CPFL Jaguari Geração 11,061 4,288 998 CPFL Planalto 1,471 2,835 1,002 CPFL Serviços - - 7,683 CPFL Atende 5,666 3,382 7,899 CPFL Total 17,810 10,767 4,734 Nect 13,424 18,155 10,780 CPFL Centrais Geradoras - 4,740 1,720 CPFL Eficiência Energética - - 380 Authi 24,264 2,537 - TOTAL 1,172,336 1,606,073 627,014 There are restrictions of transfer of funds from the concessionaires CPFL Paulista, CPFL Piratininga, CPFL Santa Cruz, RGE, CPFL Geração, ENERCAN, CERAN, BAESA and Foz do Chapecó. As such, any transfer of funds to the respective parent company, in the form of loans or advances, requires approval by ANEEL. This regulatory restriction does not apply to cash dividends determined in accordance with the Brazilian corporate law. As described in note 16, CPFL Paulista, CPFL Piratininga, RGE, CERAN and CPFL Telecom have restrictions relating to the payment of dividends, due to the debt covenants. In addition, the joint ventures ENERCAN, BAESA and Chapecoense also have restriction analogous to those described in note 12.2. f. Interest on debentures: December 31, 2017 December 31, 2016 Current and noncurrent interest Noncurrent principal Total Current and noncurrent interest Noncurrent principal Total 5 th Single series 2,817 186,000 188,817 18,069 620,000 638,069 g. Other payables: The mainly accounts payable that the parent company has registered as noncurrent liabilities are due to loans and financing guarantees for subsidiaries and profit sharing of the Executive Officers.

(3) SUMMARY OF SIGNIFICANT AC44

(3) SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)	12 Months Ended
	Dec. 31, 2017
Summary Of Significant Accounting Policies Policies
Cash and cash equivalents	In the statements of cash flows, cash and cash equivalents include negative balances of overdraft accounts that are immediately payable and are an integral part of the Group’s cash management. Cash and cash equivalents comprise the balances of cash and financial investments with original maturities of three months or less from the contract date, which are subject to an insignificant risk of change in value and are used by the Company in the management of short-term obligations.
Concession agreements	The IFRIC 12 – Service Concession Arrangements establish general guidelines for the recognition and measurement of obligations and rights related to concession agreements and apply to situations in which the granting authority controls or regulates which services the concessionaire should provide with the infrastructure, to whom the services should be provided and at what price, and controls any significant residual interest in the infrastructure at the end of the concession period. When these criteria are met, the infrastructure of distribution concessionaires is segregated at the time of construction in accordance with the IFRS requirements, so that the following are recognized in the financial statements (i) an intangible asset corresponding to the right to operate the concession and collect from the users of public utilities, and (ii) a financial asset corresponding to the unconditional contractual right to receive cash (indemnity) by transferring control of the assets at the end of the concession. The concession financial asset of distribution companies is measured based on its fair value, determined in accordance with the remuneration base for the concession assets, pursuant to the legislation in force established by the Brazilian Electricity Regulatory Agency (Agência Nacional de Energia Elétrica - ANEEL), and takes into consideration changes in the estimated cash flow, mainly based on factors such as new replacement price, and adjustment for Extended Comprehensive Consumer Price Index (“IPCA”) for the distribution subsidiaries. The financial asset of distribution companies is classified as available-for-sale, with the corresponding cash flow changes entry in the Net Operating Revenue in the statement of profit or loss for the year (notes 4 and 25). The financial asset of the transmission companies is classified as loans and receivables, initially measured at its fair value and subsequently at amortized cost using the effective interest method. The remaining amount is recognized as intangible asset and relates to the right to charge consumers for electric energy distribution services, and is amortized in accordance with the consumption pattern that reflects the estimated economic benefit to the end of the concession. Services related to the construction of infrastructure are recognized in accordance with IAS 11 – Construction Contracts, against a financial asset corresponding to the amount subject to right to receive cash (indemnity), residual amounts classified as intangible assets are amortized over the concession period in proportion to a curve that reflects the consumption pattern in relation to the economic benefits. Considering that (i) the tariff model that does not provide for a profit margin for the infrastructure construction services, (ii) the way in which the subsidiaries manage the constructions by using a high level of outsourcing, and (iii) the fact that there is no provision for profit margin on construction in the Company‘s business plans, Management is of the opinion that the margins on this operation are irrelevant, and therefore no mark-up to the cost is considered in revenue. The construction revenue and costs are therefore presented in the statement of profit or loss for the year in the same amounts.
Financial instruments	- Financial assets Financial assets are recognized initially on the date that they are originated or on the trade date at which the Company or its subsidiaries become parties to the contractual provisions of the instrument. Derecognition of a financial asset occurs when the contractual rights to the cash flows from the asset expire or when the risks and rewards of ownership of the financial asset are transferred. The Group holds the following main financial assets: i. Fair value through profit or loss: these are assets held for trading or designated as such upon initial recognition. The Group manages such assets and make purchase and sale decisions based on their fair value in accordance with their documented risk management and investment strategy. These financial assets are measured at fair value, and changes therein are recognized in profit or loss for the year. ii. Held-to-maturity: these are assets that the Group has the positive intent and ability to hold to maturity. Held-to-maturity financial assets are recognized initially at fair value and subsequently measured at amortized cost using the effective interest method, less any impairment losses. iii. Loans and receivables: these are assets with fixed or determinable payments that are not quoted in an active market. Such assets are recognized initially at fair value and subsequently measured at amortized cost using the effective interest method, less any impairment losses. iv. Available-for-sale: these are non-derivative financial assets that are designated as available-for-sale or that are not classified into any of the previous categories. Subsequent to initial recognition, interest calculated using the effective interest method is recognized in the statement of profit or loss as part of the Net Operating Revenue for the variations on the expected cash flows of distribution companies, and changes in fair value of these financial assets are recognized in other comprehensive income. The accumulated result in other comprehensive income is transferred to profit or loss when the asset is realized. - Financial liabilities Financial liabilities are initially recognized on the date that they are originated or on the trade date at which the Company or its subsidiaries become a party to the contractual provisions of the instrument. The Group has the following main financial liabilities: i. Measured at fair value through profit or loss: these are financial liabilities that are: (i) held for short-term trading, (ii) designated at fair value in order to match the effects of recognition of income and expenses to obtain more relevant and consistent accounting information, or (iii) derivatives. These liabilities are measured at fair value and any change in their fair value is subsequently recognized in profit or loss. ii. Other financial liabilities (not measured at fair value through profit or loss): these are other financial liabilities not classified into the previous category. They are measured initially at fair value net of any cost attributable to the transaction and subsequently measured at amortized cost using the effective interest rate method. The Company recognizes financial guarantees when these are granted to non-controlled entities or when the financial guarantee is granted at a percentage higher than the Company's interest to cover commitments of joint ventures. Such financial guarantees are initially measured at fair value, by recognizing (i) a liability corresponding to the risk of non-payment of the debt, which is amortized against finance income simultaneously and in proportion to amortization of the debt, and (ii) an asset equivalent to the right to compensation by the guaranteed party or a prepaid expense under the guarantees, which is amortized by receipt of cash from other shareholders or at the effective interest rate over the term of the guarantee. After initial recognition, guarantees are measured periodically at the higher of the amount determined in accordance with IAS 37 and the amount initially recognized less accumulated amortization. Financial assets and liabilities are offset and presented at their net amount when, and only when, there is a legal right to offset the amounts and the intent to realize the asset and settle the liability simultaneously. The classifications of financial instruments are described in note 33. - Capital Common shares are classified as equity. Additional costs directly attributable to share issues and share options are recognized as a deduction from equity, net of any tax effects.
Property, plant and equipment	Items of property, plant and equipment are measured at acquisition, construction or formation cost less accumulated depreciation and, if applicable, accumulated impairment losses. Cost also includes any other costs attributable to bringing the assets to the place and in a condition to operate as intended by Management, the cost of dismantling and restoring the site on which they are located and capitalized borrowing costs on qualifying assets. The replacement cost of items of property, plant and equipment is recognized if it is probable that it will involve economic benefits for the subsidiaries and if the cost can be reliably measured, and the value of the replaced item is written off. Maintenance costs are recognized in profit or loss as they are incurred. Depreciation is calculated on a straight-line basis, at annual rates of 2% to 20%, taking into consideration the estimated useful life of the assets, as instructed and defined by the granting authority. Gains and losses on disposal/ write-off of an item of property, plant and equipment are determined by comparing the proceeds from disposal with the carrying amount of the asset, and are recognized net within other operating income/expenses. Assets and facilities used in the regulated activities are tied to these services and may not be removed, disposed of, assigned or pledged in mortgage without the prior and express authorization of ANEEL. ANEEL, through Resolution No. 20 of February 3, 1999, amended by Normative Resolution No. 691 of December 8, 2015, releases Public Electric Energy Utility concessionaires from prior authorization for release of assets of no use to the concession, but determines that the proceeds from the disposal be deposited in a restricted bank account for use in the concession.
Intangible assets	Includes rights related to non-physical assets such as goodwill and concession exploration rights, software and rights-of-way. Goodwill that arises on the acquisition of subsidiaries is measured based on the difference between the fair value of the consideration transferred for acquisition of a business and the net fair value of the assets, adding the portion of noncontrolling interests and liabilities of the subsidiary acquired. Goodwill is subsequently measured at cost less accumulated impairment losses. Goodwill and other intangible assets with indefinite useful lives, if any, are not subject to amortization and are tested annually for impairment. A bargain purchase is recognized as a gain in the statement of profit or loss in the year of the business acquisition. Intangible assets corresponding to the right to operate concessions may have three origins, as follows: i. Acquisitions through business combinations: the portion arising from business combinations that corresponds to the right to operate the concession is stated as an intangible asset and,amortized over the remaining period of the concessions, on a straight-line basis; ii. Investments in infrastructure: under the electric energy distribution concession agreements with the subsidiaries, the recognized intangible asset corresponds to the concessionaires' right to charge the consumers for use of the concession infrastructure. Since the exploration term is defined in the agreement, intangible assets with defined useful lives are amortized over the concession period in proportion to a curve that reflects the consumption pattern in relation to the economic benefits. For further information see note 3.2. Items comprised in the infrastructure are directly tied to the Company’s electric energy distribution operation and cannot be removed, disposed of, assigned or pledged in mortgage without the prior and express authorization of ANEEL. ANEEL, through Resolution No. 20 of February 3, 1999, amended by Normative Resolution No. 691 of December 8, 2015, releases Public Electric Energy Utility concessionaires from prior authorization for release of assets of no use to the concession, but determines that the proceeds from the disposal be deposited in a restricted bank account for use in the concession. iii. Use of Public Asset: upon certain generation concessions were granted with the condition of payments to the federal government for Use of Public Asset. On the signing date of the respective agreements the Company’s subsidiaries recognized intangible assets and the corresponding liabilities at fair value. The Company capitalizes interests on the Use of Public Assets intangible from the signing date to the date of commencement of the operations, when the whole intagible starts to be amortized on a straight-line basis over the remaining period of each concession.
Impairment	- Financial assets A financial asset not measured at fair value through profit or loss is reassessed at each reporting date to determine whether there is objective evidence that it is impaired. Impairment can occur after the initial recognition of the asset and have a negative effect on the estimated future cash flows. The Group consider evidence of impairment of receivables and held-to-maturity securities for both specific asset and at a collective level for all significant securities. Receivables and held-to-maturity securities that are not individually significant are collectively assessed for impairment by grouping together the securities with similar risk characteristics. In assessing collective impairment the Company uses historical trends of the probability of default, timing of recoveries and the amount of loss incurred, adjusted for Management's judgment as to whether the assumptions and current economic and credit conditions are such that the actual losses are likely to be higher or lower than suggested by historical trends. An impairment loss of a financial asset is recognized as follows: I. Amortized cost: as the difference between the carrying amount and the present value of the estimated future cash flows discounted at the asset’s original effective interest rate. Losses are recognized in profit or loss and shown in an allowance account against receivables. When a subsequent event indicates that the amount of impairment loss has decreased, this reduction is reversed as a credit through profit or loss. II. Available-for-sale: as the difference between the acquisition cost, net of any reimbursement and principal repayment, and the current fair value, less any impairment loss previously recognized in profit or loss. In the case of financial assets carried at amortized cost and/or debt instruments classified as available-for-sale, if an increase (gain) is identified in subsequent periods, the impairment loss is reversed through profit or loss. However, any subsequent recovery in the fair value of an impaired equity instrument classified as available-for-sale is recognized in other comprehensive income. - Non-financial assets Non-financial assets that have indefinite useful lives, such as goodwill, are tested annually for impairment to assess whether the asset's carrying amount does not exceed its recoverable amount. Other assets subject to amortization are tested for impairment whenever events or changes in circumstances indicate that the carrying amount may be impaired. An impairment loss is recognized if the carrying amount of an asset exceeds its estimated recoverable amount, which is the greater of (i) its fair value less costs to sell and (ii) its value in use. The assets ( e.g.
Provisions	A provision is recognized if, as a result of a past event, there is a legal or constructive obligation that can be estimated reliably, and it is probable (more likely than not) that an outflow of economic benefits will be required to settle the obligation. When applicable, provisions are determined by discounting the expected future cash outflows at a rate that reflects current market assessment and the risks specific to the liability. The unwinding of the discount is recognized as finance cost.
Employee benefits	Certain subsidiaries have post-employment benefits and pension plans, recognized in accordance with IAS 19 “Employee benefits” (as revised 2011), and are regarded as Sponsors of these plans. Although the plans have particularities, they have the following characteristics: i. Defined contribution plan: a post-employment benefit plan under which the Sponsor pays fixed contributions into a separate entity and will have no liability for the actuarial deficits of the plan. The obligations are recognized as an expense in the statement of profit or loss in the periods during which the services are rendered. ii. Defined benefit plan: The net obligation is calculated as the difference between the present value of the actuarial obligation based on assumptions, biometric studies and interest rates in line with market rates, and the fair value of the plan assets as of the reporting date. The actuarial liability is calculated annually by independent actuaries, under the responsibility of Management, using the projected unit credit method. Actuarial gains and losses are recognized in other comprehensive income when they occur. Net Interest (income or expense) is calculated by applying the discount rate at the beginning of the period to the net amount of the defined benefit asset or liability. When applicable, the cost of past services is recognized immediately in profit or loss. If the plan records a surplus and it becomes necessary to recognize an asset, the recognition is limited to the present value of future economic benefits available in the form of reimbursements or future reductions in contributions to the plan.
Dividends and Interest on capital	Under Brazilian law, the Company is required to distribute a mandatory minimum annual dividend of 25% of profit adjusted in accordance with the Company´s bylaws. In conformity with IAS 10 a provision may only be made for the minimum mandatory dividend, and dividends declared but not yet approved are only recognized as a liability in the financial statements after approval by the competent body. According to Law 6,404/76, they will therefore be held in equity, in the “additional dividend proposed” account, as they do not meet the present obligation criteria at the reporting date. As established in the Company's bylaws and in accordance with current corporate law, the Board of Directors is responsible for declaring an interim dividend and interest on capital determined in a half-yearly statement of income. An interim dividend and interest on capital declared at the base date of June 30 is only recognized as a liability in the Company's financial statement after the date of the Board of Directors' decision. Interest on capital is treated in the same way as dividends and is also stated in changes in equity. The withholding income tax on interest on capital is always recognized as a charge to equity with a balancing item in liabilities upon the proposal for its payment, even if not yet approved, since it meets the criterion of obligation at the time of Management’s proposal.
Revenue recognition	The operating revenue in the normal course of the subsidiaries’ activities is measured at the fair value of the consideration received or receivable. The operating revenue is recognized when there is persuasive evidence that all significant risks and rewards were transferred to the buyer, it is probable that future economic benefits will flow to the entity, the associated costs can be reliably measured, and the amount of the operating revenue can be reliably measured. The revenue from electric energy distribution is recognized when the energy is supplied. The energy distribution subsidiaries perform the reading of their customers based on a reading routine (calendar and reading route) and invoice monthly the consumption of MWh based on the reading performed for each consumer. As a result, part of the energy distributed during the month is not billed at the end of the month and, consequently, an estimate is developed by Management and recorded as “Unbilled”. This unbilled revenue estimate is calculated using as a base the total volume of energy of each distributor made available in the month and the annualized rate of technical and commercial losses. The revenue from energy generation sales is recognized based on the assured energy and at tariffs specified in the terms of the supply contracts or the current market price, as appropriate. The revenue from energy trading is recognized based on bilateral contracts with market agents and properly registered with the Electric Energy Trading Chamber – CCEE. No single consumer accounts for 10% or more of the Company’s total revenue. The revenue from services provided is recognized when the service is provided, under a service agreement between the parties. The revenue from construction contracts is recognized based on the percentage of completion method, and losses, if any, are recognized the statement of profit or loss as incurred.
Income tax and social contribution	Income tax and social contribution expenses are calculated and recognized in accordance with the legislation in force and comprise current and deferred taxes. Income tax and social contribution are recognized in the statement of profit or loss except to the extent that they relate to items recognized directly in equity or other comprehensive income, when the net amounts of these tax effects are already recognized, and those arising from the initial recognition in business combinations. Current taxes are the expected taxes payable or receivable/recoverable on the taxable profit or loss. Deferred taxes are recognized for temporary differences between the carrying amounts of assets and liabilities for accounting purposes and the equivalent amounts used for tax purposes and for tax loss carryforwards. The Company and certain subsidiaries recognize in their financial statements the effects of tax loss carryforwards and deductible temporary differences, based on projections of future taxable profits, approved annually by the Boards of Directors and examined by the Fiscal Council. The subsidiaries also recognized tax credits relating to the tax benefits created by the corporate restructuring, which are amortized on a straight line basis for the remaining period of each concession agreement. Deferred tax assets and liabilities are offset if there is a legally enforceable right to offset current tax liabilities and assets, and they relate to taxes levied by the same tax authority on the same taxable entity. Deferred income tax and social contribution assets are reviewed at each reporting date and are reduced to the extent that it is no longer probable that the related taxes benefit will be realized.
Earnings per share	Basic earnings per share are calculated by dividing the profit or loss for the year attributable to the Company’s controlling shareholders by the weighted average number of shares outstanding during the year. Diluted earnings per share are calculated by dividing the profit or loss for the year attributable to the controlling shareholders, adjusted by the effects of instruments that potentially would have impacted the profit or loss for the year by the weighted average of the number of shares outstanding, adjusted by the effects of all dilutive potential convertible notes for the reporting periods.
Government grants - CDE (Energy Development Account)	Government grants are only recognized when it is reasonably certain that these amounts will be received by the Group. They are recognized in profit or loss for the periods in which the Company recognizes as income the discounts granted in relation to the low-income subsidy and other tariff discounts. The subsidies received through funds from the CDE (note 25) have the main purpose of offsetting discounts granted in order to provide immediate financial support to the distribution companies.
Sector financial asset and liability	According to the tariff pricing mechanism applicable to distribution companies, the energy tariffs should be set at a price level (price cap) that ensures the economic and financial equilibrium of the concession, therefore, the concessionaires and licensees are authorized to charge their consumers (after review and ratification by ANEEL) for: (i) the annual tariff increase; and (ii) every four or five years, according to each concession agreement, the periodic review for purposes of reconciliation of part of Parcel B (controllable costs) and adjustment of Parcel A (non-controllable costs). The distributors' revenue is mainly comprised of the sale of electric energy and for the delivery (transport) of the electric energy via the distribution infrastructure (network). The distribution concessionaires' revenue is affected by the volume of energy delivered and the tariff. The electric energy tariff is comprised of two parcels which reflect a breakdown of the revenue: · Parcel A (non-controllable costs): this parcel should be neutral in relation to the entity's performance, i.e. · Parcel B (controllable costs) – comprised of capital expenditure on investments in infrastructure, operational costs and maintenance and remuneration to the providers of capital. It is this parcel that actually affects the entity's performance, since it has no guarantee of tariff neutrality and thus involves an intrinsic business risk. This tariff pricing mechanism can cause temporary differences arising from the difference between the budgeted costs (Parcel A and other financial components) included in the tariff at the beginning of the tariff period and those actually incurred while it is in effect. This difference constitutes a right of the concessionaire to receive cash when the budgeted costs included in the tariff are lower than those actually incurred, or an obligation to pay if the budgeted costs are higher than those actually incurred.
Business combination	Business combinations are accounted for by applying the acquisition method. The consideration transferred in a business combination is measured at fair value, calculated as the sum of the fair values of the assets transferred by the acquirer, the liabilities incurred and the equity interests issued by the Company and subsidiaries in exchange for control of the acquiree. Costs related to the acquisition are generally recognized in profit or loss, when incurred. At the acquisition date, assets and liabilities are recognized at fair value, except for: (i) deferred taxes, (ii) employee benefits and (iii) equity instruments. The noncontrolling interests are initially measured either at fair value or at the noncontrolling interests’ proportionate share of the acquiree’s identifiable net assets. The measurement method is chosen on a transaction-by-transaction basis. The excess of the consideration transferred, added to the portion of noncontrolling interests, over the fair value of the identifiable assets (including the concession intangible asset) and net liabilities assumed at the acquisition date are recognized as goodwill. In the event that the fair value of the identifiable assets and net liabilities assumed exceeds the consideration transferred, a bargain purchase is identified and the gain is recognized in the statement of profit or loss at the acquisition date.
Basis of consolidation	(i) Business combinations The Company measures goodwill as the fair value of the consideration transferred including the recognized amount of any noncontrolling interest in the acquiree, less the recognized fair value of the identifiable assets acquired and liabilities assumed, all measured at the acquisition date. (ii) Subsidiaries and joint ventures The financial statements of subsidiaries are included in the consolidated financial statements from the date that control commences until the date that control ceases. Joint ventures are accounted for using the equity method of accounting from the moment joint control is established. The accounting policies of subsidiaries and joint ventures taken into consideration for purposes of consolidation and/or equity method of accounting, as applicable, are aligned with the Company's accounting policies. The consolidated financial statements include the balances and transactions of the Company and its subsidiaries. The balances and transactions of assets, liabilities, income and expenses have been fully consolidated for the subsidiaries. Intragroup balances and transactions, and any income and expenses derived from these transactions, are eliminated in preparing the consolidated financial statements. Unrealized gains arising from transactions with equity accounted investees are eliminated against the investment to the extent of the Company’s interest in the investee. Unrealized losses are eliminated in the same way as unrealized gains, but only to the extent that there is no evidence of impairment. In the case of subsidiaries, the portion related to noncontrolling interests is stated in equity and in the statements of profit or loss and comprehensive income in each period presented. The balances of joint ventures, as well as the Company’s interest in each of them are described in note 12.2. (iii) Acquisition of noncontrolling interests Accounted for as transaction among shareholders. Consequently, no asset or goodwill is recognized as a result of such transaction.
New standards and interpretations issued and effective	A number of IASB standards were issued or revised and are mandatory for accounting periods beginning on January 1, 2017: a) Amendments to IAS 12 – Recognition of deferred tax assets for unrealized losses Issued on January 19, 2016, the amendments to IAS 12 clarify the requirements of recognition of deferred tax assets for unrealized losses on debt instruments and the method to assess whether taxable profits will be available against which the entity can utilize a deductible temporary difference, to address the diversity in practice. The application of the amendments to IAS 12 did not have material impacts on the Company’s consolidated financial statements for the year ended December 31, 2017. b) Amendments to IAS 7 – Statement of Cash Flows Issued on January 29, 2016, the amendments to IAS 7 Disclosure Initiative require an entity to provide disclosures that enable users of financial statements to evaluate changes in liabilities arising from financing activities. The application of the amendments to IAS 7 resulted in changes in the disclosure of the movement of financial assets and liabilities the cash flows of which are classified as financing activity. The changes of these amendments to IAS 7 generated additional disclosure reflected in notes 17 – Borrowings, 18 – Debentures and 33 – Financial Instruments. c) Annual Improvements to IFRS / 2014 – 2016 Cycle Annually, the IASB discusses and decides on the proposed improvements to IFRS, as they are raised during the year. On December 8, 2016, the amendments relating to the 2014-2016 Cycle were issued, one of which is effective for annual periods beginning on or after January 1, 2017. Amendments to IFRS 12 Considering that the Company does not have interest in other entities that are classified as held for sale or discontinued operations, these amendments did not have effects on the disclosures and amounts recognized in the consolidated financial statements for the year ended December 31, 2017.
New standards and interpretations issued but not yet effective	A number of new IFRS standards and amendments to the standards and interpretations were issued by the IASB and had not yet come into effect for annual periods beginning on January 1, 2017. Consequently, the Company has not early adopted them: a) IFRS 9 - Financial instruments IFRS 9 is effective for the financial statements of an entity prepared in accordance with IFRS for annual periods beginning on or after January 1, 2018. This standard establishes new requirements for classification and measurement of financial assets and liabilities. Financial assets are classified into three categories: (i) measured at fair value through profit or loss; (ii) measured at amortized cost, based on the business model within which they are held and the characteristics of their contractual cash flows; and; (iii) measured at fair value through other comprehensive income. With regard to financial liabilities, the main alteration in relation to the requirements already set by IAS 39 requires any change in fair value of a financial liability designated at fair value through profit or loss attributable to changes in the liability's credit risk to be stated in other comprehensive income and not in the statement of profit or loss. In relation to the impairment of financial assets, IFRS 9 requires an expected credit loss model, as opposed to an incurred credit loss under IAS 39. The expected credit loss model requires an entity to account for expected credit losses and changes in those expected credit losses at each reporting date to reflect changes in credit risk since initial recognition. In other words, it is no longer necessary for a default event to have occurred before credit losses are recognized. Regarding the modifications related to hedge accounting, IFRS 9 retains three types of hedge accounting mechanisms currently available in IAS 39. Under IFRS 9, greater flexibility has been introduced to the types of risks components of non-financial items that are eligible for hedge accounting. In addition, the effectiveness test has been overhauled and replaced with the principle of an “economic relationship”. Retrospective assessment of hedge effectiveness is also no longer required. Enhanced disclosure requirements about an entity’s risk management have also been introduced. The Company’s distribution subsidiaries have material assets classified as “available-for-sale”, in accordance with the current requirements of IAS 39. These assets represent the right to indemnity at the end of the concession period of the distribution subsidiaries. The designation of these instruments as available-for-sale occurs due to the non-classification in the other three categories described in IAS 39 (loans and receivables, fair value through profit or loss and held-to-maturity). Management’s opinion is that, these assets will be classified as measured at fair value through profit or loss according to the new standard, the effects of the subsequent remeasurement of this asset would be recognized in profit or loss for the year. Thus, there will not be material impacts on the Company’s consolidated financial statements. The transmission subsidiaries have assets classified as “loans and receivables”, in accordance with the current requirements of IAS 39. These assets have two components: the right to receive the “Allowed Annual Revenue - RAP” to be received over the concession period and the indemnity at the end of the concession. These instruments are designated as loans and receivables because they are non-derivative financial assets, with fixed or determinable payments that are not quoted in an active market. Management’s opinion is that the asset arising from the receipt of RAP will be classified and measured at amortized cost with the new standard, not causing impacts on the Company’s consolidated financial statements. Regarding the indemnity receivable at the end of the concession, this will correspond to the portion of assets not depreciated over the concession at their new replacement value. Considering that the calculation of the amount to be received will not change during the concession, Management analyzes the possibility of measuring and classifying this portion of the financial asset as at fair value through profit or loss. Currently, Management’s opinion is that the effects of this possible change would be immaterial. Moreover, as the Group do not apply hedge accounting, Management concluded that there will not be material impact on the information disclosed or amounts recorded in its consolidated financial statements as a result of the amendments to standard. As regards the changes in the calculation of impairment of financial assets, the Company estimates that the impact on the equity for January 1 st Considering that the Group holds certain financial liabilities designated at fair value through profit or loss, Management believes that there will be no impacts on its consolidated financial statements since the changes in credit risk currently recognized directly in profit or loss will be recognized in other comprehensive income. For the year ended December 31, 2017, the changes in credit risk recognized in profit or loss represented an expense of R$ 92,138. b) IFRS 15 - Revenue from contracts with customers IFRS 15 provides a straightforward model for accounting for contracts with customers and it will supersede the current guide for revenue recognition provided in IAS 18 – Revenue and IAS 11 - Construction contracts and related interpretations. The standard establishes that an entity will recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. The standard introduces a five-step model for revenue recognition: (i) identify the contract with the customer; (ii) identify the performance obligations in the contract; (iii) determine the transaction price; (iv) allocate the transaction price to the performance obligations in the contract and (v) recognize revenue when (or as) the entity satisfies a performance obligation. Under IFRS 15, an entity recognizes revenue when (or as) the entity satisfies a performance obligation, i.e. IFRS 15 is effective for annual periods beginning on or after January 1, 2018. Contracts that begin and end in the same period of comparative presentation, as well as contracts that are completed at the beginning of the oldest period presented will not be restated. The Company analyzed the 5-step approach to the various types of the Group’ revenue and has not identified any material impact of the adoption of this standard on its consolidated financial statements. Therefore, after the appropriate analyses, the conclusion is that the current revenue recognition is in accordance with IFRS 15. c) IFRS 16 Leases Issued on January 13, 2016, establishes, in the lessee’s view, a new form for accounting for leases currently classified as operating leases, which are now recognized similarly to leases classified as finance leases. As regards the lessors, it virtually retains the requirements of IAS 17, including only some additional disclosure aspects. IFRS 16 is effective for annual periods beginning or on after January 1, 2019. The Company is assessing the standard and its adoption and preliminarily believes that the main impact will be the recording of lease of properties (under the lessee’s view), but no material impacts from the adoption of this standard are expected. d) IFRIC 22 – Foreign currency transactions and advance consideration Issued on December 8, 2016, IFRIC 22 addresses the exchange rate to be used in transactions that involve the consideration paid or received in advance in foreign currency transactions, IFRIC will be effective for annual periods beginning on or after January 1, 2018. The Group’s foreign currency transactions are currently restricted to debt instruments with international financial institutions, measured at fair value, and to the purchase of electricity from Itaipu. As assets and liabilities measured at fair value are outside the scope of IFRIC and there are no advance payments on operations with Itaipu, Management believes that IFRIC 22 will not have material impacts on its consolidated financial statements. e) Annual Improvements to IFRS / 2014 – 2016 Cycle Annually, the IASB discusses and decides on the proposed improvements to IFRS, as they are raised during the year. On December 8, 2016, new amendments were issued relating to the 2014-2016 cycle, effective as of January 1, 2018. Amendments to IFRS 1 As the Company is not a first-time adopter of IFRS, Management believes that the application of these amendments will not have effect on the disclosures and amounts recognized in its consolidated financial statements.

(1) OPERATIONS (Tables)

(1) OPERATIONS (Tables)	12 Months Ended
	Dec. 31, 2017
Operations Tables
Schedule of direct and indirect interests of subsidiaries and joint ventures	Energy distribution Company type Equity interest Location (state) Number of municipalities Approximate number of consumers (in thousands) Concession period End of the concession Companhia Paulista de Força e Luz ("CPFL Paulista") Publicly-held corporation Direct Interior of 234 4,389 30 years November 2027 Companhia Piratininga de Força e Luz ("CPFL Piratininga") Publicly-held corporation Direct Interior of 27 1,720 30 years October 2028 Rio Grande Energia S.A. ("RGE") Publicly-held corporation Direct Interior of 255 1,485 30 years November 2027 RGE Sul Distribuidora de Energia S.A. ("RGE Sul") Publicly-held corporation Indirect Interior of 118 1,336 30 years November 2027 Companhia Jaguari de Energia ("CPFL Santa Cruz") (e) Privately-held corporation Direct Interior of São Paulo, Paraná and Minas Gerais 45 447 30 years July 2045 Installed power (MW) Energy generation Company type Equity interest Location (state) Number of plants / type of energy Total CPFL share CPFL Geração de Energia S.A. ("CPFL Geração") Publicly-held corporation Direct São Paulo and Goiás 3 Hydropower plants (a) 1,295 678 CERAN - Companhia Energética Rio das Antas ("CERAN") Privately-held corporation Indirect Rio Grande do Sul 3 Hydropower plants 360 234 Foz do Chapecó Energia S.A. ("Foz do Chapecó") Privately-held corporation Indirect Santa Catarina and 1 Hydropower plant 855 436 Campos Novos Energia S.A. ("ENERCAN") Privately-held corporation Indirect Santa Catarina 1 Hydropower plant 880 429 BAESA - Energética Barra Grande S.A. ("BAESA") Privately-held corporation Indirect Santa Catarina and 1 Hydropower plant 690 173 Centrais Elétricas da Paraíba S.A. ("EPASA") Privately-held corporation Indirect Paraíba 2 Thermal plants 342 182 Paulista Lajeado Energia S.A. ("Paulista Lajeado") Privately-held corporation Indirect Tocantins 1 Hydropower plant 903 63 CPFL Energias Renováveis S.A. ("CPFL Renováveis") Publicly-held corporation Indirect (c) (c) (c) (c) CPFL Centrais Geradoras Ltda. ("CPFL Centrais Geradoras") Limited liability company Direct São Paulo and Minas Gerais 6 small hydropower plants 4 4 Energy commercialization Company type Core activity Equity interest CPFL Comercialização Brasil S.A. ("CPFL Brasil") Privately-held corporation Energy commercialization Direct Clion Assessoria e Comercialização de Energia Elétrica Ltda. Limited liability company Commercialization and provision of energy services Indirect CPFL Comercialização Cone Sul S.A. ("CPFL Cone Sul") Privately-held corporation Energy commercialization Indirect CPFL Planalto Ltda. ("CPFL Planalto") Limited liability company Energy commercialization Direct CPFL Brasil Varejista S.A. ("CPFL Brasil Varejista") Privately-held corporation Energy commercialization Indirect Provision of services Company type Core activity Equity interest CPFL Serviços, Equipamentos, Industria e Comércio S.A. Privately-held corporation Manufacturing, commercialization, rental and maintenance of electro-mechanical equipment and service provision Direct NECT Serviços Administrativos Ltda ("Nect") Limited liability company Provision of administrative services Direct CPFL Atende Centro de Contatos e Atendimento Ltda. ("CPFL Atende") Limited liability company Provision of call center services Direct CPFL Total Serviços Administrativos Ltda. ("CPFL Total") Limited liability company Collection services Direct CPFL Eficiência Energética S.A ("CPFL Eficiência") Privately-held corporation Energy efficiency management Direct TI Nect Serviços de Informática Ltda. ("Authi") Limited liability company Provision of IT services Direct CPFL GD S.A ("CPFL GD") Privately-held corporation Provision of maintenance services for energy generation companies Indirect Others Company type Core activity Equity interest CPFL Jaguari de Geração de Energia Ltda ("Jaguari Geração") Limited liability company Holding company Direct Chapecoense Geração S.A. ("Chapecoense") Privately-held corporation Holding company Indirect Sul Geradora Participações S.A. ("Sul Geradora") Privately-held corporation Holding company Indirect CPFL Telecom S.A ("CPFL Telecom") Privately-held corporation Telecommunication services Direct CPFL Transmissão Piracicaba S.A ("CPFL Transmissão Piracicaba") Privately-held corporation Energy transmission services Indirect CPFL Transmissora Morro Agudo S.A ("CPFL Transmissão Morro Agudo") Privately-held corporation Energy transmission services Indirect

(5) CASH AND CASH EQUIVALENTS (

(5) CASH AND CASH EQUIVALENTS (Tables)	12 Months Ended
	Dec. 31, 2017
Cash And Cash Equivalents Tables
Schedule of cash and cash equivalents components	Dec 31, 2017 Dec 31, 2016 Bank balances 365,031 170,884 Short-term financial investments 2,884,611 5,994,112 Overnight investment (a) 178,444 95,034 Bank certificates of deposit (b) 785,074 2,357,187 Repurchase agreements secured on debentures (b) 3,268 58,616 Investment funds (c) 1,917,826 3,483,274 Total 3,249,642 6,164,997 (a) Current account balances, which earn daily interest by investment in repurchase agreements secured on Bank Certificate Deposit (CDB) and interest of 15% of the variation in the Interbank Certificate of Deposit (CDI). (b) Short-term investments in Bank Certificates of Deposit (CDB) and repurchase agreements secured on debentures with major financial institutions that operate in the Brazilian financial market, with daily liquidity, short-term due, low credit risk and interest equivalent, on average, to 101.87% of the CDI. (c) Exclusive Fund investments, with daily liquidity and interest equivalent, on average, of 100% of the CDI, subject to floating rates tied to the CDI linked to their investments in federal government bonds, CDBs, financial bills and secured debentures of major financial institutions, with low credit risk and short-term due.

(6) CONSUMERS, CONCESSIONAIRE47

(6) CONSUMERS, CONCESSIONAIRES AND LICENSEES (Tables)	12 Months Ended
	Dec. 31, 2017
Consumers Concessionaires And Licensees Tables
Schedule of consumers, concessionaires and licensees	Amounts coming due Past due Total until 90 days > 90 days Dec 31, 2017 Dec 31, 2016 Current Consumer classes Residential 602,525 457,273 53,805 1,113,604 932,380 Industrial 322,250 77,148 84,232 483,630 386,826 Commercial 254,605 86,290 41,574 382,470 317,111 Rural 74,136 18,409 6,117 98,663 97,444 Public administration 69,333 15,638 3,939 88,910 94,348 Public lighting 58,475 6,573 2,485 67,533 73,142 Public utilities 87,159 8,972 4,713 100,843 97,503 Billed 1,468,483 670,303 196,865 2,335,653 1,998,754 Unbilled 1,008,486 - - 1,008,486 1,095,188 Financing of consumers' debts 169,171 20,784 39,885 229,840 170,982 CCEE transactions 182,128 229,887 1,052 413,067 289,761 Concessionaires and licensees 508,046 423 7,950 516,419 390,333 Others 36,011 - - 36,011 39,974 3,372,325 921,397 245,752 4,539,476 3,984,991 Allowance for doubtful accounts (238,193) (219,098) Total 4,301,283 3,765,893 Noncurrent Financing of consumers' debts 217,944 - - 217,944 198,875 Free Energy 5,976 - - 5,976 5,436 CCEE transactions 41,301 - - 41,301 41,301 265,221 - - 265,221 245,612 Allowance for doubtful accounts (28,683) (42,427) Total 236,539 203,185
Schedule of movements in allowance for doubtful accounts	Consumers, concessionaires and licensees Other Total As of December 31, 2014 (123,171) (15,285) (138,456) Allowance - reversal (recognition) (170,131) (1,152) (171,283) Recovery of revenue 44,338 67 44,405 Write-off of accrued receivables 89,770 1,930 91,700 As of December 31, 2015 (159,194) (14,441) (173,634) Business combination (70,636) (16,187) (86,823) Allowance - reversal (recognition) (258,377) (969) (259,347) Recovery of revenue 82,393 605 82,998 Write-off of accrued receivables 144,289 3,000 147,289 As of December 31, 2016 (261,525) (27,992) (289,517) Allowance - reversal (recognition) (263,668) (1,439) (265,107) Recovery of revenue 110,008 - 110,008 Write-off of accrued receivables 148,309 52 148,361 As of December 31, 2017 (266,876) (29,379) (296,255) Current (238,193) (29,379) (267,572) Noncurrent (28,683) - (28,683)

(7) TAXES RECOVERABLE (Tables)

(7) TAXES RECOVERABLE (Tables)	12 Months Ended
	Dec. 31, 2017
Taxes Recoverable Tables
Schedule of taxes recoverable	Dec 31, 2017 Dec 31, 2016 Current Prepayments of social contribution - CSLL 7,257 14,141 Prepayments of income tax - IRPJ 21,887 35,534 Income tax and social contribution to be offset 59,658 94,268 Income tax and social contribution recoverable 88,802 143,943 Withholding income tax - IRRF on interest on capital 43,841 3,642 Withholding income tax - IRRF 103,277 115,189 State VAT - ICMS to be offset 104,843 82,090 Social Integration Program - PIS 8,447 9,062 Contribution for Social Security Funding - COFINS 37,699 39,984 National Social Security Institute - INSS 7,597 6,374 Others 541 3,564 Other taxes recoverable 306,244 259,905 Total current 395,046 403,848 Noncurrent Social contribution to be offset - CSLL 58,856 55,498 Income tax to be offset - IRPJ 2,608 10,037 Income tax and social contribution recoverable 61,464 65,535 State VAT - ICMS to be offset 159,624 122,415 Social Integration Program - PIS 1,024 800 Contribution for Social Security Funding - COFINS 4,719 3,687 Others 6,613 5,849 Other taxes recoverable 171,980 132,751 Total noncurrent 233,444 198,286

(8) SECTOR FINANCIAL ASSETS A49

(8) SECTOR FINANCIAL ASSETS AND LIABILITIES (Tables)	12 Months Ended
	Dec. 31, 2017
Sector Financial Assets And Liabilities Tables
Schedule of sector financial assets and liabilities	As of December 31, 2016 Operating revenue Finance income /expense Receipt As of December 31, 2017 Deferred Approved Total Constitution Realization Monetary adjustment Tariff flag Deferred Approved Total Parcel "A" (762,573) 190,369 (572,203) 1,187,928 536,269 (76,726) (386,242) 924,943 (235,916) 689,026 CVA (*) CDE (**) (342,161) (70,301) (412,462) (405,409) 356,715 (38,267) - (235,901) (263,520) (499,422) Electric energy cost (506,490) (239,777) (746,267) 2,018,754 751,840 (31,144) (385,704) 1,625,759 (18,280) 1,607,479 ESS and EER (***) (406,568) (124,411) (530,979) (1,003,482) 450,638 (57,165) (151) (974,091) (167,048) (1,141,139) Proinfa 3,492 31,414 34,906 (28,048) (18,829) (6,600) - (610) (17,961) (18,572) Basic network charges 27,527 9,660 37,187 1,448 (35,035) (376) - (20,163) 23,387 3,224 Pass-through from Itaipu 147,012 442,911 589,923 1,022,892 (570,453) 43,016 - 959,518 125,860 1,085,378 Transmission from Itaipu 7,646 7,281 14,927 13,992 (13,705) 394 - 7,802 7,806 15,608 Neutrality of industry charges 142,091 164,375 306,466 89,103 (258,685) 7,767 - 32,566 112,084 144,651 Overcontracting 164,878 (30,782) 134,096 (521,321) (126,217) 5,648 (387) (469,937) (38,244) (508,181) Other financial components (182,958) (159,759) (342,717) (72,877) 249,516 (5,607) - (193,496) 21,812 (171,685) Refunds related to judicial injuctions (76,615) (132,410) (209,025) (10,038) 190,291 805 - - (27,968) (27,968) Others (106,343) (27,349) (133,692) (62,839) 59,226 (6,412) - (193,496) 49,780 (143,717) Total (945,530) 30,612 (914,918) 1,115,051 785,786 (82,333) (386,242) 731,447 (214,104) 517,341 Current assets - 210,834 Noncurrent assets - 355,003 Current liabilities (597,515) (40,111) Noncurrent liabilities (317,406) (8,385) As of December 31, 2015 Operating revenue Finance income/cost Receipt As of December 31, 2016 Deferred Approved Total Constitution Through billing Monetary adjustment Tariff flag (note 27.5) Business Combination Deferred Approved Total Parcel "A" 1,490,744 519,838 2,010,582 (644,484) (1,260,579) 28,166 (687,673) (18,213) (762,573) 190,369 (572,203) CVA (*) CDE (**) 407,295 109,937 517,232 (612,336) (329,898) (4,020) - 16,561 (342,161) (70,301) (412,462) Electric energy cost (466,337) 472,428 6,091 81,164 (179,617) (101,982) (417,883) (134,041) (506,490) (239,777) (746,267) ESS and EER (***) (25,128) (249,081) (274,209) (225,794) 385,941 (56,038) (269,352) (91,527) (406,568) (124,411) (530,979) Proinfa (814) (5,334) (6,148) 51,060 (19,335) 7,219 - 2,111 3,492 31,414 34,906 Basic network charges 28,185 68,289 96,474 19,517 (84,894) (1,449) - 7,539 27,527 9,660 37,187 Pass-through from Itaipu 1,281,279 39,416 1,320,695 (116,276) (921,201) 197,581 - 109,124 147,012 442,911 589,923 Transmission from Itaipu 11,372 4,097 15,469 8,102 (13,754) 2,163 - 2,948 7,646 7,281 14,927 Neutrality of industry charges 187,765 2,508 190,273 198,274 (171,420) 15,730 - 73,609 142,091 164,375 306,466 Overcontracting 67,127 77,578 144,705 (48,195) 73,600 (31,037) (439) (4,537) 164,878 (30,782) 134,096 Other financial components (92,098) 35,480 (56,618) (195,758) 6,126 (20,498) - (75,968) (182,958) (159,759) (342,717) Refunds related to judicial injuctions (note 27.4) - - - (223,356) 31,419 (17,088) - - (76,615) (132,410) (209,025) Others (92,098) 35,480 (56,618) 27,598 (25,294) (3,410) - (75,968) (106,343) (27,349) (133,692) Total 1,398,646 555,318 1,953,964 (840,241) (1,254,453) 7,668 (687,673) (94,181) (945,530) 30,612 (914,918) Current assets 1,464,019 - Noncurrent assets 489,945 - Current liabilities - (597,515) Noncurrent liabilities - (317,406) (*) Deferred tariff costs and gains variations from Parcel “A” items (**) Energy Development Account – CDE (***) System Service Charge (ESS) and Reserve Energy Charge (EER)

(9) DEFERRED TAX ASSETS AND L50

(9) DEFERRED TAX ASSETS AND LIABILITIES (Tables)	12 Months Ended
	Dec. 31, 2017
Deferred Tax Assets And Liabilities Tables
Schedule of deferred tax assets and liabilities	Dec 31, 2017 Dec 31, 2016 Social contribution credit (debit) Tax losses carryforwards 103,903 123,389 Tax benefit of merged goodwill 105,065 86,377 Temporarily nondeductible differences (305,677) (332,750) Subtotal (96,708) (122,984) Income tax credit (debit) Tax losses carryforwards 303,543 358,683 Tax benefit of merged goodwill 342,262 295,987 Temporarily nondeductible differences (844,948) (923,383) Subtotal (199,141) (268,713) PIS and COFINS credit (debit) Temporarily nondeductible differences (10,543) (9,580) Total (306,392) (401,276) Total tax credit 943,199 922,858 Total tax debit (1,249,591) (1,324,134)
Schedule of tax benefit of merged intangible asset	December 31, 2017 December 31, 2016 Social contribution Income tax Social contribution Income tax CPFL Paulista 45,872 127,421 50,497 140,270 CPFL Piratininga 11,215 38,491 12,251 42,044 RGE 21,513 88,843 23,629 97,584 RGE Sul 26,466 73,515 - - CPFL Geração - 13,992 - 16,090 Total 105,065 342,262 86,377 295,987
Schedule of accumulated balances of nondeductible temporary differences	December 31, 2017 December 31, 2016 Social contribution Income tax PIS/COFINS Social contribution Income tax PIS/COFINS Temporarily nondeductible differences Provision for tax, civil and labor risks 53,687 149,130 - 45,065 125,182 - Private pension fund 2,331 6,476 - 1,711 4,753 - Allowance for doubtful debts 27,354 75,985 - 26,543 73,729 - Accrued energy from the Free Market 8,382 23,284 - 7,718 21,440 - Research and development and energy efficiency programs 21,851 60,697 - 17,474 48,538 - Personnel-related provisions 4,111 11,420 - 3,422 9,506 - Depreciation rate difference 5,535 15,374 - 6,200 17,223 - Derivatives (48,848) (135,690) - (54,368) (151,023) - Recognition of concession - adjustment of intangible asset (IFRS) (7,291) (20,253) - (8,355) (23,208) - Recognition of concession - adjustment of financial asset (IFRS) (117,527) (324,387) (7,881) (104,080) (287,990) (6,157) Actuarial losses (IFRS) 25,716 71,432 - 25,390 70,527 - Financial instruments (IFRS) (5,291) (14,694) - (10,022) (27,838) - Accelerated depreciation (104) (288) - (73) (204) - Others (15,699) (41,527) (2,662) 4,491 12,281 (3,423) Temporarily nondeductible differences - accumulated comprehensive income: Property, plant and equipment - adjustment of deemed cost (IFRS) (51,961) (144,336) - (55,223) (153,398) - Actuarial losses (IFRS/CPC) 36,607 101,687 - 49,698 138,051 - Temporarily nondeductible differences - Business combination - CPFL Renováveis Deferred taxes - asset: Provision for tax, civil and labor risks 13,188 36,635 - - - - Fair value of property, plant and equipment (negative value added of assets) 21,294 59,150 - 22,771 63,252 - Deferred taxes - liability: Fair value of property, plant and equipment (value added of assets) (25,811) (71,699) - (27,472) (76,310) - Value added derived from determination of deemed cost (62,354) (173,207) - (78,443) (217,897) - Intangible asset - exploration right/authorization in indirect subsidiaries acquired (184,703) (513,064) - (183,443) (509,563) - Other temporary differences (6,145) (17,071) - (21,754) (60,435) - Total (305,677) (844,947) (10,543) (332,750) (923,383) (9,580)
Schedule of reconciliation of income tax and social contribution amounts recognized	2017 2016 2015 Social contribution Income tax Social contribution Income tax Social contribution Income tax Profit before taxes 1,846,670 1,846,670 1,380,547 1,380,547 1,454,454 1,454,454 Reconciliation to reflect effective rate: Equity interest in associates and joint ventures (312,390) (312,390) (311,414) (311,414) (216,885) (216,885) Amortization of intangible asset acquired 48,649 62,756 48,649 62,756 84,484 108,797 Effect of presumed profit regime (352,101) (430,296) (175,110) (234,827) (186,546) (244,541) Adjustment of revenue from excess demand and excess reactive power 134,778 134,778 119,272 119,272 117,374 117,374 Tax incentive - operating profit - (71,340) - (112,232) - (85,760) Other permanent additions (exclusions), net 74,015 82,631 6,420 (24,063) 42,310 59,450 Tax base 1,439,621 1,312,809 1,068,364 880,040 1,295,193 1,192,890 Statutory rate 9% 25% 9% 25% 9% 25% Tax credit (debit) (129,566) (328,202) (96,153) (220,010) (116,567) (298,223) Recognized (unrecognized) tax credit, net (39,162) (106,699) (54,706) (130,621) (43,595) (120,792) Total (168,728) (434,901) (150,859) (350,631) (160,162) (419,015) Current (153,543) (387,076) (244,015) (623,183) (10,916) (1,944) Deferred (15,185) (47,825) 93,156 272,552 (149,246) (417,071)
Schedule of income tax and social contribution amounts recognized in equity	2017 2016 2015 Social Contribution Income tax Social Contribution Income tax Social Contribution Income tax Actuarial losses (gains) (166,857) (166,857) 527,436 527,436 (84,635) (84,635) Limits on the asset ceiling 21,399 21,399 (8,738) (8,738) 7,984 7,984 Basis of calculation (145,458) (145,458) 518,698 518,698 (76,651) (76,651) Statutory rate 9% 25% 9% 25% 9% 25% Calculated taxes 13,092 36,365 (46,683) (129,675) 6,899 19,163 Limitation on recognition (reversal) of tax credits - - 13,720 38,112 (3,959) (10,998) Taxes recognized in other comprehensive income 13,092 36,365 (32,962) (91,562) 2,940 8,165

(10) CONCESSION FINANCIAL ASS51

(10) CONCESSION FINANCIAL ASSET (Tables)	12 Months Ended
	Dec. 31, 2017
Concession Financial Asset Tables
Schedule of concession financial asset distribution	Distribution Transmission Total As of December 31, 2014 3,296,837 77,779 3,374,616 Current 540,094 - 540,094 Noncurrent 2,756,744 77,779 2,834,522 Additions 330,062 37,469 367,531 Transfers to intangible assets - extended concessions (537,198) - (537,198) Adjustment of expected cash flow 414,800 - 414,800 Adjustment - financial asset measured at amortized cost - 11,400 11,400 Cash inputs - RAP - (3,257) (3,257) Disposals (20,788) - (20,788) As of December 31, 2015 3,483,713 123,391 3,607,104 Current - 9,630 9,630 Noncurrent 3,483,713 113,761 3,597,474 Additions 655,456 50,580 706,036 Adjustment of expected cash flow 203,452 - 203,452 Adjustment - financial asset measured at amortized cost - 16,088 16,088 Cash inputs - RAP - (9,727) (9,727) Disposals (25,392) - (25,392) Business combination 876,281 - 876,281 As of December 31, 2016 5,193,511 180,333 5,373,844 Current - 10,700 10,700 Noncurrent 5,193,511 169,633 5,363,144 Additions 972,254 46,261 1,018,515 Adjustment of expected cash flow 212,294 - 212,294 Adjustment - financial asset measured at amortized cost - 27,807 27,807 Cash inputs - RAP - (15,677) (15,677) Disposals (35,039) - (35,039) Business combination (12,338) - (12,338) As of December 31, 2017 6,330,681 238,723 6,569,404 Current - 23,736 23,736 Noncurrent 6,330,681 214,987 6,545,668

(11) OTHER ASSETS (Tables)

(11) OTHER ASSETS (Tables)	12 Months Ended
	Dec. 31, 2017
Other Assets Tables
Schedule of other receivables	Current Noncurrent Dec 31, 2017 Dec 31, 2016 Dec 31, 2017 Dec 31, 2016 Advances - Fundação CESP 7,851 7,533 6,797 - Advances to suppliers 31,981 15,787 - - Pledges, funds and restricted deposits 159,291 106,925 621,489 533,719 Orders in progress 167,197 203,344 5,062 - Services rendered to third parties 8,530 9,385 - - Energy pre-purchase agreements - - 26,260 27,302 Collection agreements 661 1,273 - - Prepaid expenses 80,599 65,668 20,042 20,942 GSF Insurance Premium 19,629 12,722 17,359 28,935 Receivables - CDE 242,906 213,552 - - Advances to employees 19,658 15,940 - - Arrendamentos 15,684 19,281 45,290 50,541 Others 175,889 153,764 97,893 104,815 (-) Allowance for doubtful debts (note 6) (29,379) (27,992) - - Total 900,498 797,181 840,192 766,253

(12) INVESTMENTS (Tables)

(12) INVESTMENTS (Tables)	12 Months Ended
	Dec. 31, 2017
Investments Tables
Schedule of permanent equity interests - equity method	Dec 31, 2017 Dec 31, 2016 Permanent equity interests - equity method By equity method 990,910 1,482,533 Fair value of assets, net 10,640 11,219 Total 1,001,550 1,493,753
Schedule of investment balances relate to interests in entities	Share of equity Share of profit (loss) Joint ventures Dec 31, 2017 Dec 31, 2016 2017 2016 2015 Baesa 187,654 175,914 11,849 9,853 2,508 Enercan 176,998 562,701 85,808 117,112 74,677 Chapecoense 385,870 537,170 120,651 117,451 77,487 EPASA 240,388 206,749 94,663 67,577 63,348 Fair value adjustments of assets, net 10,640 11,219 (579) (579) (1,136) 1,001,550 1,493,753 312,390 311,414 216,885
Schedule of receivable from the joint ventures, relating to dividends and interest on capital	Dividend Interest on own capital Total Investments Dec 31, 2017 Dec 31, 2016 Dec 31, 2017 Dec 31, 2016 Dec 31, 2017 Dec 31, 2016 Investco - - 2,118 2,926 2,118 2,926 Baesa 108 89 - - 108 89 Enercan 21,184 40,983 - - 21,184 40,983 Chapecoense 32,734 29,329 - - 32,734 29,329 Total 54,026 70,402 2,118 2,926 56,145 73,328
Schedule of joint venture	December 31, 2017 Joint venture Enercan Baesa Chapecoense Epasa Current assets 182,843 124,361 329,721 319,222 Cash and cash equivalents 48,695 17,873 116,425 74,741 Noncurrent assets 1,101,291 1,030,904 2,745,989 531,527 Current liabilities 291,010 121,369 426,695 157,343 Borrowings and debentures 140,090 63,154 138,788 34,299 Other financial liabilities 4,085 17,113 67,897 993 Noncurrent liabilities 629,850 283,456 1,892,407 242,765 Borrowings and debentures 510,874 - 1,172,181 186,373 Other financial liabilities 25,115 265,250 716,986 - Equity 363,273 750,440 756,608 450,641 Net operating revenue 580,430 412,329 829,525 789,402 Operational costs and expenses (273,339) (265,955) (186,638) (518,352) Depreciation and amortization (52,773) (50,621) (126,811) (35,640) Interest income 32,849 4,906 24,639 6,102 Interest expense (31,135) (27,986) (183,237) (26,197) Income tax expense (88,229) (25,442) (123,307) (39,892) Profit (loss) for the year 176,113 47,385 236,570 177,458 Equity Interests and voting capital 48.72% 25.01% 51.00% 53.34% December 31, 2016 Joint venture Enercan Baesa Chapecoense Epasa Current assets 405,874 54,703 577,296 257,082 Cash and cash equivalents 288,956 18,946 280,083 85,709 Noncurrent assets 1,174,869 1,117,120 2,892,371 562,462 Current liabilities 196,760 116,192 391,402 172,401 Borrowings and debentures 87,560 87,032 137,753 35,555 Other financial liabilities 7,848 24,119 78,372 62,762 Noncurrent liabilities 229,085 352,142 2,024,989 259,559 Borrowings and debentures 153,020 63,196 1,292,239 218,891 Other financial liabilities 26,254 276,600 730,494 28,686 Equity 1,154,897 703,489 1,053,275 387,584 Net operating revenue 564,966 239,730 789,732 548,145 Operational costs and expenses (137,159) (76,985) (140,212) (328,093) Depreciation and amortization (53,888) (51,429) (126,770) (35,075) Interest income 31,602 9,115 35,113 10,329 Interest expense (36,275) (23,961) (125,192) (23,128) Income tax expense (121,223) (20,401) (106,683) (28,011) Profit (loss) for the year 240,363 39,405 212,294 126,665 Equity Interests and voting capital 48.72% 25.01% 51.00% 53.34% December 31, 2015 Joint venture Enercan Baesa Chapecoense Epasa Net operating revenue 523,055 427,561 729,511 949,246 Operational costs and expenses (196,480) (260,004) (149,219) (729,994) Depreciation and amortization (53,733) (55,342) (130,652) (32,413) Interest income 15,742 8,426 28,235 11,275 Interest expense (56,049) (22,555) (132,625) (29,778) Income tax expense (76,795) (5,165) (76,880) (32,869) Profit (loss) for the year 153,269 10,028 151,935 118,734 Equity Interests and voting capital (*) 48.72% 25.01% 51.00% 53.34% (*) Up to January, 2015, CPFL Geração's interest in Epasa was 53.84%

(13) PROPERTY, PLANT AND EQUI54

(13) PROPERTY, PLANT AND EQUIPMENT (Tables)	12 Months Ended
	Dec. 31, 2017
Property Plant And Equipment Tables
Schedule of property, plant and equipment	Land Reservoirs, dams and water mains Buildings, construction and improvements Machinery and equipment Vehicles Furniture and fittings In progress Total At December 31, 2014 182,316 1,185,614 1,517,475 5,832,005 32,328 11,660 388,088 9,149,486 Historical cost 197,393 1,637,812 1,976,212 7,521,804 43,081 22,462 388,088 11,786,852 Accumulated depreciation (15,077) (452,199) (458,737) (1,689,799) (10,753) (10,802) - (2,637,366) Additions - - 168 512 - - 583,538 584,216 Disposals (1,354) (414) (4,093) (21,773) (558) (284) - (28,477) Transfers 2,338 140 61,615 217,462 10,436 578 (292,569) - Reclassification - cost (212) 328,101 (499,943) 172,169 22 (137) - - Transfers from/to other assets - cost (24) 2 (6,548) 6,598 (1) (186) 630 471 Depreciation (6,257) (68,562) (50,716) (370,076) (6,343) (1,926) - (503,881) Write-off of depreciation - 139 204 3,572 379 186 - 4,480 Reclassification - depreciation - (68,775) 68,711 151 - (88) - - Transfers from/to other assets - depreciation - - - 35 - - - 35 Impairment losses - - (10,891) (16,565) (32) (106) (5,519) (33,112) At December 31, 2015 176,807 1,376,246 1,075,982 5,824,089 36,230 9,696 674,166 9,173,217 Historical cost 198,141 1,965,641 1,516,228 7,878,838 52,947 22,323 674,166 12,308,285 Accumulated depreciation (21,334) (589,395) (440,246) (2,054,749) (16,717) (12,627) - (3,135,068) Additions - 171 - 236 - - 1,084,612 1,085,019 Disposals - - (421) (6,705) (1,249) (779) (26,696) (35,850) Transfers 8,325 95,799 177,902 1,160,915 22,467 456 (1,465,864) - Reclassification - cost (137) (1,434) (40,852) 52,205 12 (39) (1,219) 8,536 Transfers from/to other assets - cost - 3 - (5,025) (167) (452) (10,523) (16,164) Depreciation (7,632) (75,659) (54,035) (377,529) (8,888) (1,676) - (525,420) Write-off of depreciation (7) 1 62 4,694 480 254 - 5,484 Reclassification - depreciation (1,211) (967) (5,374) (1,002) 7 11 - (8,536) Transfers from/to other assets - depreciation - 3 (46) 1,374 150 91 - 1,572 Impairment losses - - - - - - (5,221) (5,221) Business combination - - - 2,140 27,175 - 1,049 30,364 At December 31, 2016 176,145 1,394,162 1,153,220 6,655,391 76,217 7,562 250,302 9,712,998 Historical cost 206,330 2,060,191 1,652,934 9,066,408 106,920 21,507 250,302 13,364,592 Accumulated depreciation (30,185) (666,028) (499,714) (2,411,017) (30,704) (13,945) - (3,651,594) Additions - - - 772 2,978 - 753,137 756,887 Disposals (22) (132) (140) (32,336) (2,248) (635) (8,332) (43,845) Transfers 2,950 400 154,737 574,944 20,434 1,484 (754,948) - Transfers from/to other assets - cost (1,893) 6,393 (154,880) 98,579 (126) (330) 11,033 (41,224) Depreciation (8,004) (79,276) (59,736) (431,393) (18,055) (1,332) - (597,795) Write-off of depreciation 2 124 120 9,529 1,379 387 - 11,540 Transfers from/to other assets - depreciation (683) (2,413) 1,930 9,690 (8) 108 - 8,624 Business Combination - - - - (4,800) - - (4,800) Impairment losses - - (474) (14,787) - - - (15,261) At December 31, 2017 168,494 1,319,257 1,094,777 6,870,389 75,771 7,245 251,192 9,787,125 Historical cost 207,365 2,066,850 1,652,178 9,693,512 122,540 22,026 251,192 14,015,662 Accumulated depreciation (38,870) (747,593) (557,400) (2,823,123) (46,769) (14,782) - (4,228,537) Average depreciation rate 2017 3.86% 3.93% 3.69% 4.53% 13.09% 8.31% Average depreciation rate 2016 3.86% 3.69% 3.30% 4.19% 14.31% 10.01% Average depreciation rate 2015 3.86% 3.66% 3.46% 4.62% 14.24% 10.49%

(14) INTANGIBLE ASSETS (Tables)

(14) INTANGIBLE ASSETS (Tables)	12 Months Ended
	Dec. 31, 2017
Intangible Assets Tables
Reconciliation of changes in intangible assets	Concession right Goodwill Acquired in business combinations Distribution infrastructure - operational Distribution infrastructure - in progress Public utilities Other intangible assets Total As of December 31, 2014 6,115 4,658,210 3,734,606 414,574 30,162 86,503 8,930,171 Historical cost 6,152 7,441,935 9,526,355 414,574 35,840 195,577 17,620,433 Accumulated Amortization (37) (2,783,725) (5,791,748) - (5,678) (109,074) (8,690,262) Additions - - - 879,851 - 9,298 889,149 Amortization - (302,665) (460,774) - (1,419) (12,604) (777,462) Transfer - intangible assets - - 512,912 (512,912) - - - Transfer - financial asset - - 387 (330,449) - - (330,062) Transfers from concession financial asset - extended concessions - - 488,635 48,563 - - 537,198 Disposal and transfer - other assets - - (26,584) - - (6,228) (32,813) Impairment losses - - - - - (5,844) (5,844) As of December 31, 2015 6,115 4,355,546 4,249,182 499,627 28,743 71,125 9,210,338 Historical cost 6,152 7,441,902 10,348,857 499,627 35,840 192,626 18,525,004 Accumulated Amortization (37) (3,086,356) (6,099,675) - (7,097) (121,500) (9,314,665) Additions - - - 1,213,924 - 10,507 1,224,431 Amortization - (255,110) (498,891) - (1,419) (12,438) (767,858) Transfer - intangible assets - - 610,032 (610,032) - - - Transfer - financial asset - - 9,452 (664,908) - - (655,456) Disposal and transfer - other assets - (7,283) (48,346) - - (7,410) (63,040) Business combination - 413,796 1,229,074 227,398 - - 1,870,268 Impairment losses - (40,433) - - - (2,637) (43,070) As of December 31, 2016 6,115 4,466,516 5,550,502 666,008 27,324 59,147 10,775,613 Historical cost 6,152 7,602,941 11,987,109 666,008 35,840 183,138 20,481,188 Accumulated Amortization (37) (3,136,425) (6,436,607) - (8,516) (123,990) (9,705,576) Additions - - - 1,898,434 - 9,344 1,907,778 Amortization - (286,215) (639,292) - (1,419) (9,390) (936,318) Transfer - intangible assets - - 814,643 (814,643) - - - Transfer - financial asset - - 131 (972,385) - - (972,254) Disposal and transfer - other assets - (16,244) (91,214) 48,061 - 1,723 (57,674) Corporate restructuring - note 14.4.1 - (26,766) (73,215) - - - (99,981) Impairment losses - (5,129) - - - (47) (5,176) Business combination - (15,057) (7,108) - - - (22,165) As of December 31, 2017 6,115 4,117,105 5,554,447 825,476 25,904 60,777 10,589,824 Historical cost 6,152 7,558,645 11,442,528 825,476 35,840 174,407 20,043,048 Accumulated Amortization (37) (3,441,540) (5,888,080) - (9,936) (113,630) (9,453,223)
Intangible asset acquired in business combinations	Dec 31, 2017 Dec 31, 2016 Annual amortization rate Historical cost Accumulated amortization Net value Net value 2017 2016 2015 Intangible asset - acquired in business combinations Intangible asset acquired, not merged Parent company CPFL Paulista 304,861 (207,003) 97,858 107,843 3.28% 3.28% 4.78% CPFL Piratininga 39,065 (25,040) 14,025 15,319 3.31% 3.31% 4.50% RGE 3,150 (1,827) 1,323 1,457 4.25% 4.24% 5.51% CPFL Geração 54,555 (35,488) 19,067 20,912 3.38% 3.38% 5.04% CPFL Jaguari Geração 7,896 (3,852) 4,044 4,314 3.42% 3.41% 6.36% 409,527 (273,210) 136,317 149,845 Subsidiaries CPFL Renováveis 3,717,093 (898,762) 2,818,331 2,995,028 4.75% 5.39% 4.35% RGE Sul (CPFL Jaguariúna) - - - 99,524 - 9.09% - RGE 618 (189) 429 473 7.12% 9.41% 9.41% 3,717,711 (898,951) 2,818,760 3,095,025 Subtotal 4,127,238 (1,172,161) 2,955,077 3,244,869 Intangible asset acquired and merged Subsidiaries RGE 1,120,266 (885,969) 234,297 257,924 2.11% 2.11% 1.79% RGE Sul 312,741 (33,188) 279,553 307,982 9.09% 9.09% - CPFL Geração 426,450 (323,463) 102,987 112,953 2.34% 2.34% 3.80% Subtotal 1,859,457 (1,242,620) 616,837 678,859 Intangible asset acquired and merged – Reassessed Parent company CPFL Paulista 1,074,026 (754,666) 319,360 351,565 3.00% 3.00% 4.34% CPFL Piratininga 115,762 (74,202) 41,560 45,395 3.31% 3.31% 4.50% RGE 310,128 (184,343) 125,785 138,469 4.09% 4.09% 5.32% CPFL Jaguari Geração 15,275 (8,377) 6,898 7,358 3.01% 3.01% 5.61% Subtotal 1,515,191 (1,021,588) 493,603 542,787 Subsidiaries RGE Sul 56,759 (5,171) 51,588 - 9.09% - - Total 7,558,645 (3,441,540) 4,117,105 4,466,516
Consideration paid for acquisition of RGE Sul	RGE Sul Consideration paid, net Consideration directly transferred to prior shareholders 1,698,455 Reimbursements due to adjustments related to agreement clauses (106,616) 1,591,839
Allocation of price paid at fair value of assets and liabilities acquired	October 31, 2016 October 31, 2016 Consolidated Consolidated (provisional) final Current assets Cash and cash equivalents 95,164 95,164 Consumers, concessionaries and licensees 580,945 580,945 Other current assets 89,548 89,548 Noncurrent assets Consumers, concessionaries and licensees 54,111 79,501 Deferred tax assets 204,176 310,741 Concession financial asset 876,281 863,943 Intangible assets - Distribution infrastructure 1,456,472 1,444,401 Intangible acquired in this business combination 413,796 398,739 Other noncurrent assets 147,784 155,508 Current liabilities Trade payables (479,031) (479,031) Debentures and borrowings (24,672) (24,672) Taxes, fees and contributions (65,198) (65,198) Sector financial asset (29,246) (29,246) Regulatory charges (60,787) (60,787) Other current liabilities (114,552) (114,552) Noncurrent liabilities Debentures and borrowings (1,131,949) (1,131,949) Sector financial asset (64,935) (64,939) Provision for tax, civil and labor risks (223,383) (323,595) Other noncurrent liabilities (132,686) (132,682) Net assets acquired 1,591,839 1,591,839 Goodwill arising on acquisition Consideration paid, net 1,591,839 1,591,839 (-) Fair value of assets acquired and liabilities assumed 1,591,839 1,591,839 Goodwill - -
Contingent liabilities recognized	RGE Sul October 31, 2016 Labor lawsuits (i) 11,429 Civil lawsuits (i) 83,575 Regulatory lawsuits (i) 5,850 Environmental lawsuits (ii) 41,974 Tax lawsuits (i) 7,236 150,065 Provisions recognized in the subsidiary 173,530 Provisions for tax, civil and labor risks 323,595
Net cash outflow on acquisition	Consideration paid, net 1,591,839 (-) Cash and cash equivalents balance acquired (95,164) Cash paid in the acquisition, net 1,496,675
Net operating revenue and loss of subsidiary acquired	2016 Net Operating Revenue Losses RGE Sul (November 1 to December 31, 2016) 522,677 (27,687)
Net Operating Revenue and Profit	Net operating revenue Net profit (loss) January to December, 2016 January to December, 2016 CPFL Energia Consolidated 19,112,089 879,057 Results for the period when the entity was not consolidated by CPFL(*) 2,365,090 (403,839) 21,477,179 475,218

(15) TRADE PAYABLES (Tables)

(15) TRADE PAYABLES (Tables)	12 Months Ended
	Dec. 31, 2017
Trade Payables Tables
Schedule of trade payables	Dec 31, 2017 Dec 31, 2016 Current System service charges 413 59,935 Energy purchased 2,248,748 1,868,950 Electricity network usage charges 252,170 121,884 Materials and services 650,538 545,468 Energy from the Free Market 145,002 131,893 Total 3,296,870 2,728,130 Noncurrent Energy purchased 128,438 129,148 Materials and services - 633 Total 128,438 129,781 The amounts of energy purchased recorded in noncurrent refer to the transaction made by the subsidiary RGE Sul in the period from September 1, 2000 to December 31, 2002, relating to the electricity purchase and sale transactions made on the Electric Energy Commercialization Chamber (CCEE) and adjusted, in 2002 and 2003, based on information and calculations prepared and disclosed by CCEE, the payment of which is suspended due to the judicial injunction obtained by the indirect subsidiary until the judgment of the lawsuit (notes 6 and 22).

(16) DEBTS AND BORROWINGS (Tabl

(16) DEBTS AND BORROWINGS (Tables)	12 Months Ended
	Dec. 31, 2017
Debts And Borrowings Tables
Schedule of borrowings	December 31, 2016 Borrowings raised Repayments of principal Interests, restatements and mark to market Exchange rate variations Interests paid December 31, 2017 Current Noncurrent Current Noncurrent Interests Principal Interests Principal Total Interests Principal Principal Total Measured at cost Local currency Investment 17,827 842,015 - 4,606,227 5,466,069 169,650 (1,151,289) 440,526 - (379,542) 15,564 647,250 3,882,601 4,545,415 Rental assets 38 1,034 - 3,955 5,028 - (1,038) 377 - (373) 13 1,180 2,800 3,993 Financial Institutions 89,387 255,355 144,709 1,517,251 2,006,702 185,752 (515,824) 207,812 - (343,163) 79,015 472,928 989,335 1,541,278 Others 50 59,756 - 42,370 102,176 27,209 (58,490) 5,638 - (1,793) 32 46,125 28,584 74,741 Total at cost 107,303 1,158,159 144,709 6,169,803 7,579,974 382,611 (1,726,640) 654,353 - (724,871) 94,624 1,167,484 4,903,320 6,165,427 Measured at fair value Foreign currency Financial Institutions 22,062 595,101 - 4,922,463 5,539,626 569,260 (1,315,172) 138,568 124,311 (139,596) 21,034 2,322,261 2,573,703 4,916,997 Mark to market - (1,764) - (35,651) (37,415) - - (21,137) - - - (11,375) (47,177) (58,552) Total at fair value 22,062 593,337 - 4,886,812 5,502,211 569,260 (1,315,172) 117,431 124,311 (139,596) 21,034 2,310,885 2,526,526 4,858,445 Borrowing costs - (5,213) - (32,930) (38,143) (6,415) - 12,742 - - - (4,420) (27,396) (31,816) Total 129,364 1,746,284 144,709 11,023,685 13,044,041 945,456 (3,041,812) 784,526 124,311 (864,467) 115,658 3,473,949 7,402,450 10,992,057
Schedule of borrowings measured at amortized cost	Measured at amortized cost Dec 31, 2017 Dec 31, 2016 Annual interest Amortization Collateral ESGDIV SENSI Taxa Local currency Investment CPFL Paulista FINEM V 2,883 37,078 TJLP + 2.12% to 3.3% (c) 72 monthly installments from February 2012 SGBP and CPFL Energia guarantee and receivables TJLP TJLP TJLP TRUE FINEM V 1,892 3,638 Fixed rate 8% (c) 90 monthly installments from August 2011 SGBP and CPFL Energia guarantee and receivables Others FIX fix TRUE FINEM V 23,283 30,835 Fixed rate 5.5% (b) 96 monthly installments from February 2013 SGBP and CPFL Energia guarantee and receivables Others FIX fix TRUE FINEM VI 101,068 149,984 TJLP + 2.06% to 3.08% (e) (f) 72 monthly installments from January 2014 SGBP and CPFL Energia guarantee and receivables TJLP TJLP TJLP TRUE FINEM VI 7,401 8,907 Fixed rate 2.5% (a) 114 monthly installments from June 2013 SGBP and CPFL Energia guarantee and receivables Others FIX fix TRUE FINEM VI 135,787 163,404 Fixed rate 2.5% (a) 96 monthly installments from December 2014 SGBP and CPFL Energia guarantee and receivables Others FIX fix TRUE FINEM VII 29,612 57,798 Fixed rate 6% (b) 96 monthly installments from April 2016 SGBP and CPFL Energia guarantee and receivables Others FIX fix TRUE FINEM VII 32,687 73,435 SELIC + 2.62% to 2.66% (h) 72 monthly installments from April 2016 SGBP and CPFL Energia guarantee and receivables cdi SELIC SELIC TRUE FINEM VII 54,259 132,622 TJLP + 2.12% to 2.66% (c) (d) 72 monthly installments from April 2016 SGBP and CPFL Energia guarantee and receivables TJLP TJLP TJLP TRUE FINAME 16,904 25,356 Fixed rate 4.5% 96 monthly installments from January 2012 CPFL Energia guarantee Others FIX fix TRUE CPFL Piratininga TRUE FINEM IV 1,553 19,970 TJLP + 2.12% to 3.3% (c) 72 monthly installments from February 2012 SGBP and CPFL Energia guarantee and receivables TJLP TJLP TJLP TRUE FINEM IV 610 1,173 Fixed rate 8% (c) 90 monthly installments from August 2011 SGBP and CPFL Energia guarantee and receivables Others FIX fix TRUE FINEM IV 12,108 16,035 Fixed rate 5.5% (b) 96 monthly installments from February 2013 SGBP and CPFL Energia guarantee and receivables Others FIX fix TRUE FINEM V 29,540 43,836 TJLP + 2.06% to 3.08% (e) (f) 72 monthly installments from January 2014 SGBP and CPFL Energia guarantee and receivables TJLP TJLP TJLP TRUE FINEM V 1,944 2,339 Fixed rate 2.5% (a) 114 monthly installments from June 2013 SGBP and CPFL Energia guarantee and receivables Others FIX fix TRUE FINEM V 33,791 40,664 Fixed rate 2.5% (a) 96 monthly installments from December 2014 SGBP and CPFL Energia guarantee and receivables Others FIX fix TRUE FINEM VI 37,052 41,620 SELIC + 2.62% to 2.66% (h) 72 monthly installments from April 2016 SGBP and CPFL Energia guarantee and receivables cdi SELIC SELIC TRUE FINEM VI 53,823 65,778 TJLP + 2.12% to 2.66% (c) (d) 72 monthly installments from April 2016 SGBP and CPFL Energia guarantee and receivables TJLP TJLP TJLP TRUE FINEM VI 24,308 28,198 Fixed rate 6% (b) 96 monthly installments from April 2016 SGBP and CPFL Energia guarantee and receivables Others FIX fix TRUE FINAME 8,016 12,023 Fixed rate 4.5% 96 monthly installments from January 2012 CPFL Energia guarantee Others FIX fix TRUE RGE SUL TRUE FINEP 4,481 7,757 TJLP 73 monthly installments from May 2016 Bank guarantee TJLP TJLP TJLP TRUE FINEP 5,487 7,562 Fixed rate 5% 81 monthly installments from September 2013 Bank guarantee Others FIX fix TRUE RGE TRUE FINEM V 1,745 22,444 TJLP + 2.12% to 3.3% (c) 72 monthly installments from February 2012 SGBP and CPFL Energia guarantee and receivables TJLP TJLP TJLP TRUE FINEM V 8,932 11,828 Fixed rate 5.5% (b) 96 monthly installments from February 2013 SGBP and CPFL Energia guarantee and receivables Others FIX fix TRUE FINEM VI 53,994 80,126 TJLP + 2.06% to 3.08% (e) (f) 72 monthly installments from January 2014 SGBP and CPFL Energia guarantee and receivables TJLP TJLP TJLP TRUE FINEM VI 783 942 Fixed rate 2.5% (a) 114 monthly installments from June 2013 SGBP and CPFL Energia guarantee and receivables Others FIX fix TRUE FINEM VI 49,930 60,085 Fixed rate 2.5% (a) 96 monthly installments from December 2014 SGBP and CPFL Energia guarantee and receivables Others FIX fix TRUE FINEM VII 34,001 39,442 Fixed rate 6% (b) 96 monthly installments from April 2016 SGBP and CPFL Energia guarantee and receivables Others FIX fix TRUE FINEM VII 58,097 65,261 SELIC + 2.62% to 2.66% (h) 72 monthly installments from April 2016 SGBP and CPFL Energia guarantee and receivables cdi SELIC SELIC TRUE FINEM VII 66,601 81,394 TJLP + 2.12% to 2.66% (d) 72 monthly installments from April 2016 SGBP and CPFL Energia guarantee and receivables TJLP TJLP TJLP TRUE FINAME 4,022 6,033 Fixed rate 4.5% 96 monthly installments from January 2012 CPFL Energia guarantee Others FIX fix TRUE FINAME 109 168 Fixed rate 10.0% 90 monthly installments from May 2012 Liens on assets Others FIX fix TRUE FINAME 443 579 Fixed rate 10.0% 66 monthly installments from October 2015 Liens on assets Others FIX fix TRUE Companhia Luz e Força Santa Cruz TRUE FINEM — 9,094 Fixed rate 6% 111 monthly installments from April 2015 CPFL Energia guarantee Others FIX fix TRUE FINEM — 3,381 SELIC + 2.19% 72 monthly installments from April 2015 CPFL Energia guarantee cdi SELIC SELIC TRUE FINEM — 6,062 TJLP + 2.19% 72 monthly installments from April 2015 CPFL Energia guarantee TJLP TJLP TJLP TRUE CPFL Leste Paulista TRUE FINEM — 3,397 Fixed rate 6% 111 monthly installments from April 2015 CPFL Energia guarantee Others FIX fix TRUE FINEM — 1,239 SELIC + 2.19% 72 monthly installments from April 2015 CPFL Energia guarantee cdi SELIC SELIC TRUE FINEM — 2,224 TJLP + 2.19% 72 monthly installments from April 2015 CPFL Energia guarantee TJLP TJLP TJLP TRUE CPFL Sul Paulista TRUE FINEM — 2,412 Fixed rate 6% 111 monthly installments from April 2015 CPFL Energia guarantee Others FIX fix TRUE FINEM — 1,731 SELIC + 2.19% 72 monthly installments from April 2015 CPFL Energia guarantee cdi SELIC SELIC TRUE FINEM — 3,122 TJLP + 2.19% 72 monthly installments from April 2015 CPFL Energia guarantee TJLP TJLP TJLP TRUE Companhia Jaguari de Energia (CPFL Santa Cruz) TRUE Santander - Bank credit note 3,514 — TJLP + 2.99% (f) 96 monthly installments from October 2015 CPFL Energia guarantee TJLP TJLP TJLP TRUE Santander - Bank credit note 1,215 — UMBNDES +1.99% 96 monthly installments from October 2015 CPFL Energia guarantee Others USD usd TRUE Santander - Bank credit note 2,759 1,464 TJLP + 3.1% 96 monthly installments from June 2014 CPFL Energia guarantee TJLP TJLP TJLP TRUE Santander - Bank credit note 1,077 572 UMBNDES + 2.1% 96 monthly installments from June 2014 CPFL Energia guarantee Others USD usd TRUE FINEM 15,016 2,422 Fixed rate 6% 111 monthly installments from April 2015 CPFL Energia guarantee Others FIX fix TRUE FINEM 6,424 1,287 SELIC + 2.19% 72 monthly installments from April 2015 CPFL Energia guarantee cdi SELIC SELIC TRUE FINEM 12 — Selic + 3.63% 36 monthly installments from December 2018 CPFL Energia guarantee cdi SELIC SELIC TRUE FINEM 10,612 2,321 TJLP + 2.19% 72 monthly installments from April 2015 CPFL Energia guarantee TJLP TJLP TJLP TRUE FINEM 6,204 — TJLP + 3.29% 36 monthly installments from December 2018 CPFL Energia guarantee TJLP TJLP TJLP TRUE FINEM 206 — TJLP + 3.39% 96 monthly installments from May 2019 CPFL Energia guarantee TJLP TJLP TJLP TRUE CPFL Mococa TRUE Santander - Bank credit note — 1,883 TJLP + 3.1% 96 monthly installments from June 2014 CPFL Energia guarantee TJLP TJLP TJLP TRUE Santander - Bank credit note — 736 UMBNDES + 2.1% 96 monthly installments from June 2014 CPFL Energia guarantee Others USD usd TRUE Santander - Bank credit note — 1,413 UMBNDES +1.99% 96 monthly installments from October 2015 CPFL Energia guarantee Others USD usd TRUE Santander - Bank credit note — 4,081 TJLP + 2.99% (f) 96 monthly installments from October 2015 CPFL Energia guarantee TJLP TJLP TJLP TRUE CPFL Serviços TRUE FINAME 1,086 1,297 Fixed rate 2.5% to 5.5% 96 monthly installments from August 2014 CPFL Energia guarantee and liens on equipment Others FIX fix TRUE FINAME 253 313 Fixed rate 6% 72 monthly installments from April 2016 CPFL Energia guarantee and liens on equipment Others FIX fix TRUE FINAME 472 668 Fixed rate 7.7% to 10% 90 monthly installments from December 2012 CPFL Energia guarantee and liens on equipment Others FIX fix TRUE FINAME 9,534 11,292 Fixed rate 2.5% to 5.5% 114 monthly installments from February 2013 CPFL Energia guarantee and liens on equipment Others FIX fix TRUE FINAME 33 47 TJLP + 4.2% 90 monthly installments from November 2012 CPFL Energia guarantee and liens on equipment TJLP TJLP TJLP TRUE FINAME 1,839 2,249 Fixed rate 6% 90 monthly installments from October 2014 CPFL Energia guarantee and liens on equipment Others FIX fix TRUE FINAME 88 101 Fixed rate 6% 96 monthly installments from July 2016 CPFL Energia guarantee and liens on equipment Others FIX fix TRUE FINAME 5,039 5,768 Fixed rate 6% 114 monthly installments from June 2015 CPFL Energia guarantee and liens on equipment Others FIX fix TRUE FINAME 514 762 TJLP + 2.2% to 3.2% (c) 56 monthly installments from July 2015 CPFL Energia guarantee and liens on equipment TJLP TJLP TJLP TRUE FINAME 3,060 3,870 Fixed rate 9.5% to 10% (c) 66 monthly installments from October 2015 CPFL Energia guarantee and liens on equipment Others FIX fix TRUE FINAME 1,276 1,589 Fixed rate 6% to 10% (e) 66 monthly installments from August 2016 CPFL Energia guarantee and liens on equipment Others FIX fix TRUE FINAME 5,216 5,832 TJLP + 3.50% (e) 48 monthly installments from June 2017 CPFL Energia guarantee and liens on equipment TJLP TJLP TJLP TRUE FINAME 1,201 2,511 SELIC + 3.90% 48 monthly installments from June 2017 CPFL Energia guarantee and liens on equipment cdi SELIC SELIC TRUE FINAME 1,251 — SELIC + 3.86% 48 monthly installments from August 2017 CPFL Energia guarantee and liens on equipment cdi SELIC SELIC TRUE FINAME 1,262 1,147 TJLP + 3.40% 36 monthly installments from August 2017 CPFL Energia guarantee and liens on equipment cdi TJLP TJLP TRUE FINAME 588 495 SELIC + 3.74% 36 monthly installments from August 2017 CPFL Energia guarantee and liens on equipment TJLP SELIC SELIC TRUE FINAME 2,613 — SELIC + 3.58% to 3.72% 36 monthly installments from January 2019 CPFL Energia guarantee and liens on equipment cdi SELIC SELIC TRUE FINAME 8,905 — TJLP + 3.25% to 3.38% 36 monthly installments from January 2019 CPFL Energia guarantee and liens on equipment TJLP TJLP TJLP TRUE CPFL Telecom TRUE FINAME — 7,448 Fixed rate 6.0% (b) 60 monthly installments from December 2016 CPFL Energia guarantee Others FIX fix TRUE FINEM — 7,849 SELIC + 3.12% (h) 60 monthly installments from December 2016 CPFL Energia guarantee cdi SELIC SELIC TRUE FINEM — 21,342 TJLP + 2.12% to 3.12% (c) 60 monthly installments from December 2016 CPFL Energia guarantee TJLP TJLP TJLP TRUE FINEM — 470 TJLP 60 monthly installments from December 2016 CPFL Energia guarantee TJLP TJLP TJLP TRUE CPFL Transmissão Piracicaba TRUE FINAME 14,275 16,871 Fixed rate 3.0% 96 monthly installments from July 2015 CPFL Energia guarantee Others FIX fix TRUE CERAN TRUE BNDES — 266,484 TJLP + 3.69% to 5% 208 monthly installments from December 2005 Pledge of shares; assignment of credit, concession rights and revenues TJLP TJLP TJLP TRUE BNDES — 48,409 UMBNDES + 5% (1) 208 monthly installments from February 2006 Pledge of shares; assignment of credit, concession rights and revenues cdi USD usd TRUE CPFL Renováveis TRUE FINEM I 232,310 262,224 TJLP + 1.95% 168 monthly installments from October 2009 Pledge of the subdidiary's and PCH Holding's shares; assignment of credit and concession rights ; and liens on equipment TJLP TJLP TJLP TRUE FINEM II 18,951 22,210 TJLP + 1.90% 144 monthly installments from June 2011 CPFL Energia and CPFL Bioenergia guarantees, liens on assets and assignment of credit rights TJLP TJLP TJLP TRUE FINEM III 460,623 495,912 TJLP + 1.72% 192 monthly installments from May 2013 SGBP and CPFL Energia guarantees; pledge of subsidiary's shares; liens on assets; and assignment of credit rights TJLP TJLP TJLP TRUE FINEM V 69,485 80,362 TJLP + 2.8% to 3.4% 143 monthly installments from December 2011 CPFL Renováveis guarantee; pledge of subsidiary's shares; liens on assets; and assignment of credit and concession rights TJLP TJLP TJLP TRUE FINEM VI 69,619 74,737 TJLP + 2.05% 192 monthly installments from October 2013 SGBP, CPFL Energia and CPFL Renováveis guarantees; pledge of subsidiary's shares; and assignment of credit and concession rights TJLP TJLP TJLP TRUE FINEM VII 119,234 138,474 TJLP + 1.92 % 156 monthly installments from October 2010 Pledge of subsidiary's shares; liens on assets; and assignment of credit and concession rights TJLP TJLP TJLP TRUE FINEM IX 17,827 25,195 TJLP + 2.15% 120 monthly installments from May 2010 SGBP, CPFL Energia and CPFL Renováveis guarantees; pledge of subsidiary's shares; liens on assets; assignment of credit and concession rights and real estate mortgage TJLP TJLP TJLP TRUE FINEM X — 230 TJLP 84 monthly installments from October 2010 Pledge of subsidiary's shares; liens on assets; and assignment of credit and concession rights TJLP TJLP TJLP TRUE FINEM XI 95,016 105,670 TJLP + 1.87% to 1.9% 168 monthly installments from January 2012 CPFL Energia guarantee; liens on assets; and assignment of credit rights TJLP TJLP TJLP TRUE FINEM XII 297,835 317,289 TJLP and TJLP + 2.18% 192 monthly installments from July 2014 SGBP, CPFL Energia, CPFL Renováveis and Eólica Holding guarantees; pledge of the subsidiary's and Eólica Holding's shares; liens on assets; assignment of credit and concession rights TJLP TJLP TJLP TRUE FINEM XIII 298,439 318,257 TJLP + 2.02% to 2.18% 192 monthly installments from November 2014 SGBP, CPFL Energia and CPFL Renováveis guarantees; pledge of the subsidiary's shares; liens on assets; assignment of credit and concession rights TJLP TJLP TJLP TRUE FINEM XV 23,185 27,305 TJLP + 3.44% 139 monthly installments from September 2011 SGBP, CPFL Energia and CPFL Renováveis guarantees; pledge of the subsidiary's shares; and assignment of credit and concession rights TJLP TJLP TJLP TRUE FINEM XVI 4,335 6,418 Fixed rate 5.50% 101 monthly installments from September 2011 SGBP, CPFL Energia and CPFL Renováveis guarantees; pledge of the subsidiary's shares; and assignment of credit and concession rights Others FIX fix TRUE FINEM XVII 428,205 460,426 TJLP and TJLP + 2.18% 192 monthly installments from January 2013 Bank guarantee; pledge of the subsidiary's and DESA Eólica's shares; liens on assets; and assignment of credit and concession rights TJLP TJLP TJLP TRUE FINEM XVIII 9,044 13,763 Fixed rate 4.5% 102 monthly installments from June 2011 CPFL Energia and Bioenergia guarantees; liens on assets; and assignment of credit rights Others FIX fix TRUE FINEM XIX 27,579 29,559 TJLP + 2.02% 192 monthly installments from January 2014 SGBP, CPFL Energia and CPFL Renováveis guarantees; pledge of subsidiary's shares; liens on assets; and assignment of credit and concession rights TJLP TJLP TJLP TRUE FINEM XX 37,208 44,650 Fixed rate 2.5% 108 monthly installments from January 2014 SGBP, CPFL Energia and CPFL Renováveis guarantees; pledge of subsidiary's shares; liens on assets; and assignment of credit and concession rights Others FIX fix TRUE FINEM XXI 37,583 40,281 TJLP + 2.02% 192 monthly installments from January 2014 SGBP, CPFL Energia and CPFL Renováveis guarantees; pledge of subsidiary's shares; liens on assets; and assignment of credit and concession rights TJLP TJLP TJLP TRUE FINEM XXII 32,734 39,281 Fixed rate 2.5% 108 monthly installments from January 2014 SGBP, CPFL Energia and CPFL Renováveis guarantees; pledge of subsidiary's shares; liens on assets; and assignment of credit and concession rights Others FIX fix TRUE FINEM XXIII 1,153 1,729 Fixed rate 4.5% 102 monthly installments from June 2011 Pledge of subsidiary's shares; liens on assets; and assignment of credit and concession rights Others FIX fix TRUE FINEM XXIV 82,632 109,580 Fixed rate 5.5% 108 monthly installments from January 2012 SGBP and CPFL Energia guarantees; liens on assets; and assignment of credit rights Others FIX fix TRUE FINEM XXV 83,136 87,492 TJLP + 2.18% 192 monthly installments from July 2016 SGBP and CPFL Energia guarantees; pledge of subsidiary's shares; liens on assets; and assignment of credit and concession rights TJLP TJLP TJLP TRUE FINEM XXVI 681,912 525,011 TJLP + 2.75% 192 monthly installments from July 2017 SGBP and CPFL Energia guarantees; pledge of subsidiary's and T-16's shares; liens on assets; and assignment of credit and concession rights TJLP TJLP TJLP TRUE FINEM XXVII 67,584 70,532 TJLP + 2,02% 162 monthly installments from November 2016 SGBP, CPFL Energia and CPFL Renováveis guarantees; pledge of subsidiary's shares; and assignment of credit and concession rights TJLP TJLP TJLP TRUE FINEM XXVIII 1,415 — TJLP 144 monthly installments from January 2018 SGBP, CPFL Energia and CPFL Renováveis guarantees; pledge of subsidiary's shares; liens on assets; and assignment of credit and concession rights TJLP TJLP TJLP TRUE FINAME I 2,387 2,857 Fixed rate 2.5% 96 monthly installments from February 2015 CPFL Renováveis guarantee; and liens on assets Others FIX fix TRUE FINEP I 904 1,397 Fixed rate 3.5% 61 monthly installments from October 2014 Bank guarantee Others FIX fix TRUE FINEP II 9,516 10,445 TJLP - 1.0% 85 monthly installments from June 2017 Bank guarantee TJLP TJLP TJLP TRUE FINEP III 4,091 5,232 TJLP + 2.0% 73 monthly installments from July 2015 Bank guarantee Others FIX fix TRUE BNB I 92,926 100,323 Fixed rate 9.5% to 10% and compliance bonus of 15% 168 monthly installments from January 2009 SIIF Énergies do Brasil guarantee; pledge of subsidiary's shares; liens on assets; and assignment of credit and concession rights Others FIX fix TRUE BNB II 151,428 158,364 Fixed rate 10% and compliance bonus of 15% to 25% 222 monthly installments from May 2010 BVP S.A. and bank guarantees; pledge of subsidiary's shares; liens on assets; and assignment of credit and concession rights Others FIX fix TRUE BNB III 27,138 29,020 Fixed rate 9.5% and compliance bonus of 25% 228 monthly installments from July 2009 CPFL Renováveis guarantee; pledge of subsidiary's shares; liens on assets; and assignment of credit and concession rights Others FIX fix TRUE NIB 57,291 67,872 IGPM + 8.63% 50 quarterly installments from June 2011 Pledge of subsidiary's shares; liens on assets; and assignment of credit and concession rights IGP-M IGP-M igp-m TRUE TRUE Purchase of assets TRUE CPFL Eficiência TRUE FINAME 2,281 2,923 Fixed rate 4.5% to 8.7% 96 monthly installments from March 2012 CPFL Energia guarantee Others FIX fix TRUE FINAME 81 99 Fixed rate 6% 72 monthly installments from October 2016 CPFL Energia guarantee Others FIX fix TRUE FINAME 171 234 TJLP + 2.70% 48 monthly installments from August 2016 CPFL Energia guarantee TJLP TJLP TJLP TRUE FINAME 174 219 SELIC + 2.70% 48 monthly installments from August 2016 CPFL Energia guarantee cdi CDI CDI TRUE FINAME 100 121 Fixed rate 9.5% 36 monthly installments from September 2017 CPFL Energia guarantee Others FIX fix TRUE FINAME 515 678 Fixed rate 9.5% 48 monthly installments from February 2017 CPFL Energia guarantee and liens on equipment Others FIX fix TRUE FINAME 672 753 TJLP + 3.50% 48 monthly installments from August 2017 CPFL Energia guarantee and liens on equipment TJLP TJLP TJLP TRUE TRUE Financial institutions TRUE CPFL Paulista TRUE Banco do Brasil - Working capital — 380,403 104.90% of CDI (f) 2 annual installments from July 2017 CPFL Energia guarantee CDI CDI CDI TRUE CPFL Piratininga TRUE Banco do Brasil - Working capital — 66,951 104.90% of CDI (f) 2 annual installments from July 2017 CPFL Energia guarantee CDI CDI CDI TRUE Companhia Luz e Força Santa Cruz TRUE Banco do Brasil - Working capital — 50,213 104.90% of CDI (f) 2 annual installments from July 2017 CPFL Energia guarantee CDI CDI CDI TRUE Banco IBM - Working capital — 6,925 CDI + 0.27% (f) 12 semiannual installments from June 2015 CPFL Energia guarantee CDI CDI CDI TRUE CPFL Leste Paulista TRUE Banco IBM - Working capital — 5,405 100.0% of CDI 14 semiannual installments from December 2012 CPFL Energia guarantee CDI CDI CDI TRUE Banco IBM - Working capital — 20,955 CDI + 0.1% 12 semiannual installments from October 2014 CPFL Energia guarantee CDI CDI CDI TRUE Banco IBM - Working capital — 15,658 CDI + 0.27% 12 semiannual installments from March 2015 CPFL Energia guarantee CDI CDI CDI TRUE Banco IBM - Working capital — 6,993 CDI + 1.33% (f) 8 semiannual installments from January 2016 CPFL Energia guarantee CDI CDI CDI TRUE CPFL Sul Paulista TRUE Banco do Brasil - Working capital — 31,954 104.90% of CDI (f) 2 annual installments from July 2017 CPFL Energia guarantee CDI CDI CDI TRUE Banco IBM - Working capital — 7,888 CDI + 0.27% to 1.33 (f) 12 semiannual installments from June 2015 CPFL Energia guarantee CDI CDI CDI TRUE Banco IBM - Working capital — 6,784 CDI + 1.27% 8 semiannual installments from February 2017 CPFL Energia guarantee CDI CDI CDI TRUE Companhia Jaguari de Energia (CPFL Santa Cruz) TRUE Banco do Brasil - Working capital 95,682 4,413 104.90% of CDI (f) 2 annual installments from July 2017 CPFL Energia guarantee CDI CDI CDI TRUE Banco IBM - Working capital 35,895 — CDI + 0.27% (f) 12 semiannual installments from June 2015 CPFL Energia guarantee CDI CDI CDI TRUE Banco IBM - Working capital 5,180 — CDI + 1.33% (f) 8 semiannual installments from January 2016 CPFL Energia guarantee CDI CDI CDI TRUE Banco IBM - Working capital 5,652 — CDI + 1.27% 8 semiannual installments from February 2017 CPFL Energia guarantee CDI CDI CDI TRUE Banco IBM - Working capital 13,111 10,726 100.0% of CDI 14 semiannual installments from December 2012 CPFL Energia guarantee CDI CDI CDI TRUE Banco IBM - Working capital 25,443 11,297 CDI + 0.1% 12 semiannual installments from October 2014 CPFL Energia guarantee CDI CDI CDI TRUE CPFL Mococa TRUE Banco do Brasil - Working capital — 28,911 104.90% of CDI (f) 2 annual installments from July 2017 CPFL Energia guarantee CDI CDI CDI TRUE Banco IBM - Working capital — 3,481 100.0% of CDI 14 semiannual installments from December 2012 CPFL Energia guarantee CDI CDI CDI TRUE Banco IBM - Working capital — 13,296 CDI + 0.27% 12 semiannual installments from March 2015 CPFL Energia guarantee CDI CDI CDI TRUE CPFL Serviços TRUE Banco IBM - Working capital 1,279 3,473 CDI + 0.10% 11 semiannual installments from June 2013 CPFL Energia guarantee CDI CDI CDI TRUE Promissory notes 46,941 — 104.0% of CDI 1 installment in June 2018 CPFL Energia guarantee CDI CDI CDI TRUE CPFL Geração TRUE Banco do Brasil - Working capital 630,309 641,316 109.5% of CDI 1 installment in March 2019 CPFL Energia guarantee CDI CDI CDI TRUE CPFL Telecom TRUE Banco IBM - Working capital — 31,449 CDI + 0.18% 12 semiannual installments from August 2014 CPFL Energia guarantee CDI CDI CDI TRUE CPFL Transmissão Morro Agudo TRUE Santander — 5,031 CDI + 1.60% 1 installment in March 2017 CPFL Energia guarantee CDI CDI CDI TRUE CPFL Renováveis TRUE Bradesco 204,934 250,363 CDI + 0.5% 8 annual installment from June 2013 No collateral CDI CDI CDI TRUE Safra 194,006 208,547 105% of CDI 14 installments from August 2016 No collateral CDI CDI CDI TRUE Banco BBM - Bank credit note 44,095 44,171 CDI + 3.40% 1 installment in March 2018 No collateral CDI CDI CDI TRUE Banco BBM - Bank credit note 26,198 — CDI + 1.90% Bullet CPFL Renováveis guarantee CDI CDI CDI TRUE Banco ABC - Bank credit note — 44,217 CDI + 3.80% 1 installment in December 2017 No collateral CDI CDI CDI TRUE Deustche Bank - Bank credit note 46,966 — CDI + 1.45% Bullet CPFL Renováveis promissory note CDI CDI CDI TRUE Banco ABC - Promissory notes 102,006 105,883 CDI + 3.80% 4 semiannual installments from February 2017 No guarantee CDI CDI CDI TRUE Banco BBM - Promissory notes 63,582 — CDI + 1.39% 1 installment in June 2018 CPFL Renováveis guarantee CDI CDI CDI TRUE TRUE Others TRUE Eletrobrás TRUE CPFL Paulista 2,410 2,960 RGR + 6% to 6.5% 120 monthly installments from January 2013 Receivables and promissory notes Others RGR RGR TRUE RGE 3,988 5,851 RGR + 6% 120 monthly installments from May 2008 Receivables and promissory notes Others RGR RGR TRUE RGE SUL 18,970 25,946 RGR + 6% 120 monthly installments from December 2008 Bank guarantee; assignment of credit rights; and promissory notes Others RGR RGR TRUE CPFL Santa Cruz — 508 RGR + 6% 120 monthly installments from January 2007 Receivables and promissory notes Others RGR RGR TRUE CPFL Leste Paulista — 338 RGR + 6% 120 monthly installments from February 2008 Receivables and promissory notes Others RGR RGR TRUE CPFL Sul Paulista — 303 RGR + 6% 120 monthly installments from August 2007 Receivables and promissory notes Others RGR RGR TRUE CPFL Jaguari — 9 RGR + 6% 120 monthly installments from June 2007 Receivables and promissory notes Others RGR RGR TRUE CPFL Mococa — 122 RGR + 6% 120 monthly installments from January 2008 Receivables and promissory notes Others RGR RGR TRUE Others 49,372 66,141 Others Outros Outros TRUE Subtotal local currency 6,165,427 7,579,974 TRUE TRUE Foreign currency TRUE Measured at fair value TRUE Financial institutions TRUE CPFL Paulista TRUE Bank of America Merrill Lynch 332,766 327,503 US$+Libor 3 months+1.35% (3) 1 installment in october 2018 CPFL Energia guarantee and promissory notes CDI USD usd TRUE Bank of America Merrill Lynch 148,930 146,703 US$+Libor 3 months+1.70% (4) 1 installment in September 2018 CPFL Energia guarantee and promissory notes CDI USD usd TRUE Bank of Tokyo-Mitsubishi 165,826 163,279 US$ + Libor 3 months + 0.88% (3) (g) 1 installment in February 2020 CPFL Energia guarantee and promissory notes CDI USD usd TRUE Bank of Tokyo-Mitsubishi 124,211 163,106 US$+Libor 3 months+0.80% (3) (f) 4 semiannual installments from September 2017 CPFL Energia guarantee and promissory notes CDI USD usd TRUE BNP Paribas — 68,663 Euro + 1.6350% (2) 1 installment in January 2018 CPFL Energia guarantee and promissory notes CDI EUR eur TRUE HSBC — 282,808 US$ + Libor 3 months + 1.30% (2) 1 installment in January 2018 CPFL Energia guarantee and promissory notes CDI USD usd TRUE J.P. Morgan — 130,522 US$ + 2.28% to 2.32% (3) 1 installment in December 2017 CPFL Energia guarantee and promissory notes CDI USD usd TRUE J.P. Morgan — 115,382 US$ + 2.36% to 2.39% (3) 1 installment in January 2018 CPFL Energia guarantee and promissory notes CDI USD usd TRUE J.P. Morgan 83,783 82,544 US$ + 2.74% (3) 1 installment in January 2019 CPFL Energia guarantee and promissory notes CDI USD usd TRUE J.P. Morgan — 49,311 US$ + 2.2% (3) 1 installment in February 2018 CPFL Energia guarantee and promissory notes CDI USD usd TRUE Bank of America Merrill Lynch 498,061 490,334 US$ + Libor 3 months + 1.40% (3) 1 installment in February 2018 CPFL Energia guarantee and promissory notes CDI USD usd TRUE Mizuho Bank 248,189 244,484 US$+Libor 3 months+1.55% (3) (f) 3 semiannual installments from March 2018 CPFL Energia guarantee and promissory notes CDI USD usd TRUE Syndicated transaction (**) - Bank of America Merrill Lynch, Citibank, HSBC and EDC-Export Development Canada 221,475 218,104 US$ + Libor 3 months + 2.7% (4) 5 semiannual installments from May 2019 CPFL Energia guarantee and promissory notes CDI USD usd TRUE CPFL Piratininga TRUE BNP Paribas 218,814 188,822 Euro + 1.6350% (3) 1 installment in January 2018 CPFL Energia guarantee and promissory notes CDI EUR eur TRUE Citibank 207,743 204,486 US$ + Libor 3 months + 1.41% (3) 2 annual installments from January 2019 CPFL Energia guarantee and promissory notes CDI USD usd TRUE Citibank 165,740 163,225 US$ + Libor 3 months + 1.35% (4) 1 installment in March 2019 CPFL Energia guarantee and promissory notes CDI USD usd TRUE Scotiabank — 54,235 US$ + 2.08% (3) 1 installment in August 2017 CPFL Energia guarantee and promissory notes CDI USD usd TRUE Sumitomo 166,346 163,712 US$ + Libor 3 months + 1.35% (3) (f) 1 installment in April 2018 CPFL Energia guarantee and promissory notes CDI USD usd TRUE Syndicated transaction (**) - Bank of America Merrill Lynch, Citibank, HSBC and EDC-Export Development Canada 221,475 218,104 US$ + Libor 3 months + 2.7% (4) 5 semiannual installments from May 2019 CPFL Energia guarantee and promissory notes CDI USD usd TRUE RGE TRUE Bank of Tokyo-Mitsubishi 59,793 58,852 US$ + Libor 3 months + 0.82%(3) 1 installment in April 2018 CPFL Energia guarantee and promissory notes CDI USD usd TRUE Bank of Tokyo-Mitsubishi 271,893 267,740 US$ + Libor 3 months + 0.83%(3) 1 installment in May 2018 CPFL Energia guarantee and promissory notes CDI USD usd TRUE Syndicated transaction (**) - Bank of America Merrill Lynch, Citibank, HSBC and EDC-Export Development Canada 221,475 218,104 US$ + Libor 3 months + 2.7% (4) 5 semiannual installments from May 2019 CPFL Energia guarantee and promissory notes CDI USD usd TRUE Bank of Tokyo-Mitsubishi 172,592 — US$ + 1.9275% 1 installment in October 2018 CPFL Energia guarantee and promissory notes CDI USD usd TRUE HSBC — 44,496 US$ + Libor 3 months + 1.30% (2) 1 installment in October 2017 CPFL Energia guarantee and promissory notes CDI USD usd TRUE J.P. Morgan — 199,826 US$ + 2.78% (3) 1 installment in February 2018 CPFL Energia guarantee and promissory notes CDI USD usd TRUE CPFL Santa Cruz TRUE Scotiabank — 16,556 US$ + 3.37% (4) 1 installment in July 2019 CPFL Energia guarantee and promissory notes CDI USD usd TRUE CPFL Sul Paulista TRUE Scotiabank — 16,556 US$ + 3.37% (4) 1 installment in July 2019 CPFL Energia guarantee and promissory notes CDI USD usd TRUE CPFL Leste Paulista TRUE Scotiabank — 16,556 US$ + 3.37% (4) 1 installment in July 2019 CPFL Energia guarantee and promissory notes CDI USD usd TRUE CPFL Jaguari TRUE Scotiabank 67,219 16,556 US$ + 3.37% (4) 1 installment in July 2019 CPFL Energia guarantee and promissory notes CDI USD usd TRUE CPFL Geração TRUE HSBC — 326,159 US$+Libor 3 months + 1.30% (2) 1 installment in March 2017 CPFL Energia guarantee and promissory notes CDI USD usd TRUE China Construction Bank - Bank credit note 99,443 97,946 US$+Libor 3 months + 1.60% + 1.4% fee (4) 1 installment in June 2019 CPFL Energia guarantee and promissory notes CDI USD usd TRUE Scotiabank 119,314 117,550 US$ + 3.3703% (4) 1 installment in July 2019 CPFL Energia guarantee and promissory notes CDI USD usd TRUE Citibank 397,328 391,380 US$+Libor 3 months + 1.41% (3) 3 annual installments from September 2018 CPFL Energia guarantee and promissory notes CDI USD usd TRUE China Construction Bank - Bank credit note 33,120 32,624 US$ + Libor 3 months + 1.20% + 1.1% fee (3) 1 installment in September 2019 CPFL Energia guarantee and promissory notes CDI USD usd TRUE Scotiabank 165,572 163,125 US$ + 3.1259% 1 installment in December 2019 CPFL Energia guarantee Others USD usd TRUE Paulista Lajeado TRUE Banco Itaú 36,311 35,771 US$ + 3.196% (4) 1 installment in March 2018 CPFL Energia guarantee and promissory notes CDI USD usd TRUE CPFL Brasil TRUE Scotiabank 45,161 44,501 US$ + 2.779% (3) 1 installment in August 2018 CPFL Energia guarantee and promissory notes CDI USD usd TRUE Scotiabank 11,731 — US$ + 2.6201% (3) 1 installment in September 2020 CPFL Energia guarantee and promissory notes CDI USD usd TRUE Scotiabank 253,626 — US$ + 2.2997% (3) 1 installment in September 2020 CPFL Energia guarantee and promissory notes CDI USD usd TRUE Scotiabank 159,060 — US$ + 2.3073% 1 installment in October 2020 CPFL Energia guarantee and promissory notes CDI USD usd TRUE TRUE Mark to market (58,552 ) (37,415 ) Others USD usd TRUE usd Total in foreign currency - fair value 4,858,445 5,502,211 Borrowing costs (*) (31,816 ) (38,143 ) Total - Consolidated 10,992,057 13,044,041 The subsidiaries hold swaps converting the operating cost of currency variation to interest tax variation in reais. corresponding to : (1) 143.85% of CDI (2) 95.20% of CDI (3) 99% to 109% of CDI (4) 109.1% to 119% of CDI Effective rate: (a) 30% to 40% of CDI (d) 70.1% to 80% of CDI (g) 110.1% to 120% of CDI (b) 40.1% to 50% of CDI (e) 80.1% to 90% of CDI (h) 120.1% to 130% of CDI (c) 60.1% to 70% of CDI (f) 100.1% to 110% of CDI
Schedule of maturities principal borrowings	2019 2,737,432 2020 1,744,143 2021 649,487 2022 453,085 2023 371,895 2024 to 2028 1,155,315 2029 to 2033 338,270 Subtotal 7,449,627 Mark to market (47,177) Total 7,402,450
Schedule of borrowings by type of interest rates	Accumulated variation (%) % of debt Index 2017 2016 Dec 31, 2017 Dec 31, 2016 IGP-M (0.52) 7.17 0.52 0.53 TJLP 7.00 7.50 31.38 31.48 CDI 6.89 13.63 59.49 56.31 Others 8.60 11.68 100.00 100.00
Schedule of main borrowings raised in the period	R$ thousand Company Bank / credit issue Total approved Released in 2017 Released net of fundraising costs Interest Loan purpose Local currency Companhia Luz e Força Santa Cruz, CPFL Leste Paulista, Companhia Jaguari de Energia (CPFL Santa Cruz), CPFL Sul Paulista and CPFL Mococa FINAME (a) 6,556 6,556 6,556 Quarterly Subsidiary's investment plan CPFL Serviços FINAME (a) 11,286 11,286 11,286 Quarterly Purchase of machinery and equipment CPFL Serviços Promissory Notes 45,000 45,000 45,000 Due with principal Working capital CPFL Renováveis FINEM XXVI 764,109 146,730 142,811 Monthly Subsidiary's investment plan CPFL Renováveis FINEM XXVII 87,184 1,699 1,699 Monthly Subsidiary's investment plan CPFL Renováveis FINEM XXVIII 206,000 1,414 1,414 Monthly Subsidiary's investment plan CPFL Renováveis BBM / Promissory Notes (a) 62,000 62,000 61,833 Due with principal Working capital CPFL Renováveis Bank credit note (a) 11,000 11,000 10,794 Due with principal Working capital CPFL Renováveis Bank credit note (a) 14,000 14,000 13,737 Due with principal Working capital CPFL Renováveis Bank credit note (a) 1,000 1,000 981 Due with principal Working capital CPFL Renováveis Bank credit note (a) 44,000 44,000 44,000 Due with principal Working capital CPFL Renováveis Bank credit note (a) 2,752 2,752 2,700 Due with principal Working capital 1,254,887 347,437 342,811 Foreign currency CPFL Brasil Law 4.131 - Scotiabank 400,000 400,000 400,000 Semiannual Working capital RGE Law 4.131 - Bank of Tokyo - Mitsubishi 169,260 169,260 169,260 Quarterly Working capital 569,260 569,260 569,260 1,824,147 916,697 912,071

(17) DEBENTURES (Tables)

(17) DEBENTURES (Tables)	12 Months Ended
	Dec. 31, 2017
Debentures Tables
Schedule of debenture and interest on debenture	December 31, 2016 Debentures issued Repayments of principal Interests and monetary adjustment Exchange rates December 31, 2017 Debentures 9,067,520 2,486,000 (2,231,451) 913,313 (981,986) 9,253,396 Borrowing costs (67,575) (33,371) - 24,076 - (76,870) Total 8,999,945 2,452,629 (2,231,451) 937,389 (981,986) 9,176,526 December 31, 2017 December 31, 2016 Issue Current and noncurrent interest Current Noncurrent Total Current and noncurrent interest Current Noncurrent Total CPFL Paulista 6th Issue Single series - - - - 47,079 198,000 462,000 707,079 7th Issue Single series 17,134 126,250 378,750 522,134 28,913 - 505,000 533,913 8th Issue 1st series 1,669 - 215,310 216,980 - - - - 8th Issue 2nd series 2,925 - 358,224 361,149 - - - - 8th Issue 3rd series 1,161 - 131,397 132,558 - - - - 22,890 126,250 1,083,681 1,232,821 75,992 198,000 967,000 1,240,992 CPFL Piratininga 6th Issue Single series 1,950 - 44,000 45,950 7,846 33,000 77,000 117,846 7th Issue Single series 7,973 58,750 176,250 242,973 13,455 - 235,000 248,455 8th Issue 2nd series 7,669 - 246,000 253,669 - - - - 8th Issue 1st series 1,174 - 61,125 62,299 - - - - 18,766 58,750 527,375 604,891 21,301 33,000 312,000 366,301 RGE 6th Issue Single series 8,864 - 200,000 208,864 35,666 150,000 350,000 535,666 7th Issue Single series 5,768 42,500 127,500 175,768 9,733 - 170,000 179,733 8th Issue 2nd series 7,812 - 250,000 257,812 - - - - 8th Issue 1st series 2,573 - 132,573 135,146 - - - - 25,017 42,500 710,073 777,590 45,399 150,000 520,000 715,399 Companhia Luz e Força Santa Cruz 1st Issue Single series - - - - 550 32,500 32,500 65,550 Companhia Jaguari de Energia (CPFL Santa Cruz) 1st Issue Single series 135 32,500 - 32,635 - - - - RGE Sul 4th Issue Single series 16,662 - 1,100,000 1,116,662 32,058 - 1,100,000 1,132,058 6th Issue Single series 312 - 220,000 220,312 - - - - 16,974 - 1,320,000 1,336,974 32,058 - 1,100,000 1,132,058 CPFL Brasil 3rd Issue Single series 6,059 - 400,000 406,059 11,657 - 400,000 411,657 CPFL Geração 5th Issue Single series 3,366 546,000 - 549,366 12,969 546,000 546,000 1,104,969 6th Issue Single series 13,671 153,318 306,682 473,671 23,228 - 460,000 483,228 7th Issue Single series 8,978 - 635,000 643,978 16,379 - 635,000 651,379 8th Issue Single series 3,401 - 87,905 91,306 3,369 - 85,520 88,889 9th Issue Single series 550 - 51,672 52,221 524 - 50,278 50,802 29,966 699,318 1,081,259 1,810,543 56,470 546,000 1,776,798 2,379,268 CPFL Energia 5th Issue Single series 2,817 - 186,000 188,817 18,069 - 620,000 638,069 CPFL Renováveis 1st Issue - SIIF (*) 1st to 12th series 762 44,968 449,678 495,408 762 41,938 461,314 504,014 1st Issue - PCH Holding 2 Single series 260 8,701 123,391 132,352 644 8,700 132,091 141,435 1st Issue - Dobrevê Single series - - - - 425 17,500 - 17,925 2nd Issue - Dobrevê Single series 39,857 43,329 21,671 104,857 29,153 - 65,000 94,153 1st Issue - Pedra Cheirosa I Single series 1,617 64,653 - 66,270 6,675 52,200 - 58,875 1st Issue - Pedra Cheirosa II Single series 1,481 59,203 - 60,684 6,114 47,800 - 53,914 1st Issue - Boa Vista II Single series - - - - 6,395 50,000 - 56,395 1st Issue - CPFL Renováveis Single series 2,970 64,500 258,000 325,470 6,160 43,000 322,500 371,660 2nd Issue - CPFL Renováveis Single series 5,531 60,000 210,000 275,531 11,486 30,000 270,000 311,486 3rd Issue - CPFL Renováveis Single series 2,169 98,657 197,343 298,169 4,444 - 296,000 300,444 4th Issue - CPFL Renováveis 1st series 4,534 - 200,000 204,534 7,925 - 200,000 207,925 5th Issue - CPFL Renováveis Single series 9,716 12,000 88,000 109,716 - - - - 7th Issue - CPFL Renováveis Single series 6,244 - 253,529 259,773 - - - - 75,141 456,011 1,801,612 2,332,764 80,183 291,138 1,746,905 2,118,226 CERAN 1st Issue 1st series 181 106,000 212,000 318,181 - - - - 1st Issue 2nd series 121 - 212,000 212,121 - - - - 302 106,000 424,000 530,302 - - - - Borrowing costs (**) (7,580) (8,745) (60,546) (76,870) (7,346) (8,545) (51,684) (67,575) 190,489 1,512,584 7,473,454 9,176,526 334,333 1,242,092 7,423,518 8,999,945 Issue Quantity issued Annual Remuneration Annual Amortization conditions Collateral Taxa CPFL Paulista 6th Issue Single series 660 CDI + 0.8% CDI + 0.87% 3 annual installments from July 2017 CPFL Energia guarantee CDI 7th Issue Single series 50,500 CDI + 0.83% (3) CDI + 0.89% 4 annual installments from February 2018 CPFL Energia guarantee CDI 8th Issue 1st series 213,804 IPCA + 4.42% IPCA + 4.42% 1 installment in September 2022 CPFL Energia guarantee IPCA 8th Issue 2nd series 355,718 IPCA + 4.66% IPCA + 4.66% 2 annual installments from September 2023 CPFL Energia guarantee IPCA 8th Issue 3rd series 130,478 IPCA + 5.05% IPCA + 5.05% 3 annual installments from September 2025 CPFL Energia guarantee IPCA CPFL Piratininga 6th Issue Single series 110 CDI + 0.8% CDI + 0.91% 3 annual installments from July 2017 CPFL Energia guarantee CDI 7th Issue Single series 23,500 CDI + 0.83% (2) CDI + 0.89% 4 annual installments from February 2018 CPFL Energia guarantee CDI 8th Issue 2nd series 246,000 109.5% of CDI 109.5% CDI 2 annual installments from February 2021 CPFL Energia guarantee CDI 8th Issue 1st series 60,000 IPCA + 5.2901% IPCA + 5.2901% 2 annual installments from February 2023 CPFL Energia guarantee IPCA RGE 6th Issue Single series 500 CDI + 0.8% CDI + 0.88% 3 annual installments from July 2017 CPFL Energia guarantee CDI 7th Issue Single series 17,000 CDI + 0.83% (3) CDI + 0.88% 4 annual installments from February 2018 CPFL Energia guarantee CDI 8th Issue 2nd series 250,000 111.25% of CDI 111.25% CDI 2 annual installments from February 2021 CPFL Energia guarantee CDI 8th Issue 1st series 130,000 IPCA + 5.3473% IPCA + 5.3473% 2 annual installments from February 2023 CPFL Energia guarantee IPCA Companhia Luz e Força Santa Cruz 1st Issue Single series 650 CDI + 1.4% CDI + 1.52% 2 annual instalments from June 2017 CPFL Energia guarantee CDI Companhia Jaguari de Energia (CPFL Santa Cruz) 1st Issue Single series 650 CDI + 1.4% CDI + 1.52% 2 annual instalments from June 2017 CPFL Energia guarantee CDI RGE Sul 4th Issue Single series 110,000 114.5% of CDI 120.65% of CDI 2 annual installments from October 2019 CPFL Energia guarantee CDI 6th Issue Single series 520,000 CDI + 0.48% CDI + 0.48% 1 installment in December 2020 CPFL Energia guarantee CDI CPFL Brasil 3rd Issue Single series 40,000 114.5% of CDI 120.04% of CDI 2 annual installments from October 2019 CPFL Energia guarantee CDI CPFL Geração 5th Issue Single series 10,920 CDI + 1.4% CDI + 1.48% 2 annual instalments from June 2017 CPFL Energia guarantee CDI 6th Issue Single series 46,000 CDI + 0.75% (1) CDI + 0.75% 3 annual instalments from August 2018 CPFL Energia guarantee CDI 7th Issue Single series 63,500 CDI + 1.06% CDI + 1.11% 1 installment in April 2019 CPFL Energia guarantee CDI 8th Issue Single series 1 IPCA + 5.86% (1) 103.33% CDI 1 installment in April 2019 CPFL Energia guarantee IPCA 9th Issue Single series 50,000 IPCA+ 5.4764% 101.74% of CDI 1 installment in October 2021 CPFL Energia guarantee IPCA CPFL Energia 5th Issue Single series 62,500 114.5% of CDI 120.65% of CDI 2 annual installments from October 2019 No guarantee CDI CPFL Renováveis 1st Issue - SIIF 1st to 12th series 432,299,666 TJLP + 1% TJLP + 1% + 0.6% 39 semiannual installments from 2009 Liens TJLP 1st Issue - PCH Holding 2 Single series 1,581 CDI + 1.6% CDI + 1.8% 9 annual installments from June 2015 CPFL Renováveis guarantee CDI 1st Issue - Dobrevê Single series 20 CDI + 1.75% CDI + 1.75% 3 semiannual installments from May 2016 Unsecured CDI 2nd Issue - Dobrevê Single series 65 CDI + 1.34% CDI + 1.34% 3 semiannual installments from April 2018 Unsecured CDI 1st Issue - Pedra Cheirosa I Single series 5,220 CDI + 2.85% CDI + 2.85% 1 installment in March 2018 CPFL Renováveis guarantee CDI 1st Issue - Pedra Cheirosa II Single series 4,780 CDI + 2.85% CDI + 2.85% 1 installment in March 2018 CPFL Renováveis guarantee CDI 1st Issue - Boa Vista II Single series 5,000 CDI + 2.85% CDI + 2.85% 1 installment in September 2017 CPFL Renováveis guarantee CDI 1st Issue - CPFL Renováveis Single series 43,000 CDI + 1.7% CDI + 2.6% 9 annual installments from May 2015 Assignment of dividends of BVP and PCH Holding CDI 2nd Issue - CPFL Renováveis Single series 300,000 114.0% of CDI 129.39% CDI 5 annual instalments from June 2017 Unsecured CDI 3rd Issue - CPFL Renováveis Single series 29,600 117.25% of CDI 120.64% CDI 3 semiannual installments from April 2018 Unsecured CDI 4th Issue - CPFL Renováveis 1st series 20,000 126% CDI 134.22% CDI 3 annual installments from September 2019 CPFL Energia guarantee CDI 5th Issue - CPFL Renováveis Single series 100,000,000 129.5% of CDI 144.46% CDI Semiannual installments from June 2018 Assignment of 60% of quotas and credit rights of PPA contracts of Ludesa, and Dobrevê guarantee CDI 7th Issue - CPFL Renováveis Single series 250,000 IPCA + 5.62% IPCA + 6.14% Bullet CPFL Energia guarantee IPCA CERAN 1st Issue 1st series 318,000 107.75% of CDI 109.82% CDI 3 annual installments from December 2018 No guarantee CDI 1st Issue 2nd series 212,000 107.75% of CDI 109.82% CDI 2 annual installments from December 2021 No guarantee CDI The Company and its subsidiaries hold swaps that convert the prefixed component of interest on the operation to interest rate variation in reais, corresponding to: (1) 100.15% to 106.9% of CDI (2) 107% to 107.9% of CDI (3) 108% to 108.1% of CDI (*) These debentures can be converted into shares and, therefore, are considered in the calculation of the dilutive effect for earnings per share (note 24) (**) In accordance with IAS 39, this refers to borrowings costs attributable to issuance of the respective debt instruments.
Schedule of debentures maturities	2019 2,549,412 2020 1,907,240 2021 1,061,702 2022 975,082 2023 423,730 2024 to 2028 556,288 Total 7,473,454
Schedule of debentures obtained	R$ thousand Company Issue Quantity issued Released in 2017 Released net of issuance costs Interest Utilization CPFL Piratininga 8th Issue 306,000 306,000 303,437 Semiannual Subsidiary's investment plan, debt profile and working capital improvement RGE 8th Issue 380,000 380,000 376,605 Semiannual Subsidiary's investment plan, debt profile and working capital improvement CPFL Paulista 8th Issue 700,000 700,000 685,463 Semiannual Subsidiary's investment plan, debt profile and working capital improvement RGE Sul 6th Issue 520,000 220,000 219,887 Semiannual Subsidiary's investment plan, debt profile and working capital improvement CPFL Renováveis - parent company (a) 5th Issue 100,000,000 100,000 97,072 Semiannual Subsidiary's investment plan CPFL Renováveis - parent company (a) 7th Issue 250,000 250,000 243,472 Semiannual Subsidiary's investment plan CERAN 1st Issue 530,000 530,000 527,708 Semiannual Transfer of resources to shareholders 2,486,000 2,453,644

(18) PRIVATE PENSION PLAN (Tabl

(18) PRIVATE PENSION PLAN (Tables)	12 Months Ended
	Dec. 31, 2017
Private Pension Plan Tables
Schedule of net defined benefit liability	December 31, 2017 CPFL CPFL Piratininga CPFL RGE RGE Sul Total Present value of actuarial obligations 4,615,061 1,247,462 110,801 365,924 524,293 6,863,541 Fair value of plan's assets (3,925,061) (1,105,738) (94,378) (387,322) (446,670) (5,959,170) Present value of net obligations (fair value of assets) 690,000 141,724 16,424 (21,399) 77,623 904,369 Effect of asset ceiling - - - 21,399 - 21,399 Net actuarial liability recognized in the statement of financial position 690,000 141,724 16,424 - 77,623 925,768 December 31, 2016 CPFL CPFL Piratininga CPFL RGE RGE Sul Total Present value of actuarial obligations 4,524,008 1,202,596 108,486 352,879 480,081 6,668,050 Fair value of plan's assets (3,723,563) (1,062,638) (89,533) (347,906) (405,251) (5,628,892) Net actuarial liability recognized in the statement of financial position 800,445 139,958 18,953 4,972 74,830 1,039,158 December 31, 2015 CPFL CPFL Piratininga CPFL RGE RGE Sul Total Present value of actuarial obligations 3,793,259 961,329 90,609 278,985 - 5,124,182 Fair value of plan's assets (3,355,589) (951,021) (80,332) (287,202) - (4,674,144) Present value of net obligations (fair value of assets) 437,670 10,308 10,277 (8,217) - 450,038 Effect of asset ceiling - - - 8,217 - 8,217 Net actuarial liability recognized in the statement of financial position 437,670 10,308 10,277 - - 458,255
Schedule for changes in the present value of the actuarial obligations and the fair value of the plan's assets	CPFL CPFL Piratininga CPFL RGE RGE Sul Total Present value of actuarial obligations at December 31, 2014 3,820,563 986,972 88,621 279,283 - 5,175,439 Gross current service cost 1,183 3,733 160 (131) - 4,945 Interest on actuarial obligations 425,465 110,425 9,944 31,490 - 577,324 Participants' contributions transferred during the year 12 1,842 - 611 - 2,465 Actuarial loss: effect of changes in demographic assumptions (226) (614) (12) (6) - (858) Actuarial loss: effect of changes in financial assumptions (98,399) (70,590) (400) (11,884) - (181,273) Benefits paid during the year (355,339) (70,439) (7,704) (20,378) - (453,860) Present value of actuarial obligations at December 31, 2015 3,793,259 961,329 90,609 278,985 - 5,124,182 Business combination - - - - 474,710 474,710 Gross current service cost 828 3,242 76 59 365 4,570 Interest on actuarial obligations 467,872 121,158 11,184 35,211 8,469 643,894 Participants' contributions transferred during the year 59 2,020 - 319 165 2,563 Actuarial loss: effect of changes in demographic assumptions - - - 3,602 - 3,602 Actuarial loss: effect of changes in financial assumptions 619,803 193,652 14,909 57,793 3,613 889,770 Benefits paid during the year (357,813) (78,805) (8,292) (23,090) (7,241) (475,241) Present value of actuarial obligations at December 31, 2016 4,524,008 1,202,596 108,486 352,879 480,081 6,668,050 Gross current service cost 707 3,153 73 270 2,153 6,356 Interest on actuarial obligations 476,613 127,561 11,431 37,395 50,927 703,927 Participants' contributions transferred during the year 37 2,044 - 302 990 3,373 Actuarial loss: effect of changes in demographic assumptions 225 328 14 326 16,490 17,383 Actuarial loss: effect of changes in financial assumptions (6,993) (3,586) (372) (45) 8,153 (2,843) Benefits paid during the year (379,536) (84,634) (8,831) (25,203) (34,501) (532,705) Present value of actuarial obligations at December 31, 2017 4,615,061 1,247,462 110,801 365,924 524,293 6,863,541 CPFL CPFL Piratininga CPFL RGE RGE Sul Total Fair value of actuarial assets at December 31, 2014 (3,315,422) (913,589) (85,360) (273,019) - (4,587,390) Expected return during the year (375,527) (105,413) (9,691) (31,686) - (522,317) Participants' contributions transferred during the year (12) (1,842) - (611) - (2,465) Sponsors' contributions (81,111) (22,936) (1,687) (7,593) - (113,327) Actuarial loss (gain): return on assets 61,144 22,320 8,702 5,329 - 97,495 Benefits paid during the year 355,339 70,439 7,704 20,378 - 453,860 Fair value of actuarial assets at December 31, 2015 (3,355,589) (951,021) (80,332) (287,202) - (4,674,144) Business combination - - - - (415,621) (415,621) Expected return during the year (404,183) (115,607) (9,582) (35,632) (7,470) (572,474) Participants' contributions transferred during the year (59) (2,020) - (319) (165) (2,563) Sponsors' contributions (48,263) (13,405) (843) (9,441) (1,437) (73,389) Actuarial loss (gain): return on assets (273,282) (59,390) (7,068) (38,403) 12,201 (365,942) Benefits paid during the year 357,813 78,805 8,292 23,090 7,241 475,241 Fair value of actuarial assets at December 31, 2016 (3,723,563) (1,062,638) (89,533) (347,906) (405,251) (5,628,892) Expected return during the year (392,819) (113,470) (9,437) (37,412) (43,258) (596,396) Participants' contributions transferred during the year (37) (2,044) - (302) (990) (3,373) Sponsors' contributions (50,308) (17,296) (753) (7,296) (6,169) (81,822) Actuarial loss (gain): return on assets (137,870) 5,076 (3,486) (19,610) (25,503) (181,393) Benefits paid during the year 379,536 84,634 8,831 25,203 34,501 532,705 Fair value of actuarial assets at December 31, 2017 (3,925,061) (1,105,738) (94,378) (387,322) (446,670) (5,959,170)
Schedule for changes in net liability	CPFL CPFL Piratininga CPFL RGE RGE Sul Total Net actuarial liability at December 31, 2014 505,140 73,383 3,261 6,264 - 588,048 Expenses (income) recognized in the statement of profit or loss 51,121 8,745 413 (95) - 60,184 Sponsors' contributions transferred during the year (81,111) (22,936) (1,687) (7,593) - (113,327) Actuarial loss (gain): effect of changes in demographic assumptions (226) (614) (12) (6) - (858) Actuarial loss (gain): effect of changes in financial assumptions (98,399) (70,590) (400) (11,884) - (181,273) Actuarial loss (gain): return on assets 61,144 22,320 8,702 5,329 - 97,495 Effect of asset ceiling - - - 7,984 - 7,984 Net actuarial liability at December 31, 2015 437,670 10,308 10,277 - - 458,255 Other contributions 16,149 526 63 127 - 16,865 Total liability 453,819 10,834 10,340 127 - 475,120 Current 648 27 - 127 - 802 Noncurrent 453,171 10,806 10,340 - - 474,318 CPFL CPFL Piratininga CPFL RGE RGE Sul Total Net actuarial liability at December 31, 2015 437,670 10,308 10,277 - - 458,255 Business combination - - - - 59,089 59,089 Expenses (income) recognized in the statement of profit or loss 64,514 8,791 1,677 158 1,364 76,505 Sponsors' contributions transferred during the year (48,263) (13,405) (843) (9,442) (1,438) (73,388) Actuarial loss (gain): effect of changes in demographic assumptions - - - 3,602 - 3,602 Actuarial loss (gain): effect of changes in financial assumptions 619,805 193,653 14,911 57,795 3,613 889,773 Actuarial loss (gain): return on assets (273,282) (59,390) (7,068) (38,403) 12,201 (365,942) Effect of asset ceiling - - - (8,738) - (8,738) Net actuarial liability at December 31, 2016 800,445 139,958 18,954 4,972 74,830 1,039,158 Other contributions 12,914 133 8 228 - 13,284 Total liability 813,359 140,091 18,962 5,200 74,830 1,052,442 Current 26,082 6,437 460 228 - 33,209 Noncurrent 787,276 133,653 18,502 4,972 74,830 1,019,233 CPFL CPFL Piratininga CPFL RGE RGE Sul Total Net actuarial liability at December 31, 2016 800,445 139,958 18,954 4,972 74,830 1,039,158 Expenses (income) recognized in the statement of profit or loss 84,501 17,244 2,067 253 9,822 113,887 Sponsors' contributions transferred during the year (50,308) (17,296) (753) (7,296) (6,169) (81,822) Actuarial loss (gain): effect of changes in demographic assumptions 225 328 14 326 16,490 17,383 Actuarial loss (gain): effect of changes in financial assumptions (6,993) (3,586) (372) (45) 8,153 (2,843) Actuarial loss (gain): return on assets (137,870) 5,076 (3,486) (19,610) (25,503) (181,393) Effect of asset ceiling - - - 21,399 - 21,399 Net actuarial liability at December 31, 2017 690,000 141,724 16,424 - 77,623 925,768 Other contributions 14,436 637 158 160 - 15,391 Total liability 704,436 142,361 16,582 160 77,623 941,160 Current 45,606 14,015 986 160 33 60,801 Noncurrent 658,829 128,346 15,595 - 77,589 880,360
Schedule for expected contributions to the plans for 2017	2018 CPFL Paulista 86,703 CPFL Piratininga 28,792 CPFL Geração 1,826 RGE 7,495 RGE Sul 6,370 Total 131,186
Schedule for expected benefits to be paid by the plan administrators in the next 10 years	2018 2019 2020 2021 2022 to 2027 Total CPFL Paulista 374,545 387,635 399,573 410,879 2,663,707 4,236,339 CPFL Piratininga 84,231 88,618 92,230 96,650 667,185 1,028,914 CPFL Geração 9,010 9,252 9,572 9,829 63,274 100,937 RGE 26,223 27,396 28,545 29,487 200,079 311,730 RGE Sul 34,547 36,367 38,047 39,680 274,712 423,353 Total 528,556 549,268 567,967 586,525 3,868,957 6,101,273
Schedule for external actuary's estimate of the expenses (income) to be recognized and the expense (income) recognized	2018 Estimated CPFL CPFL Piratininga CPFL RGE RGE Sul Total Service cost 835 4,365 78 175 2,790 8,243 Interest on actuarial obligations 421,083 114,628 10,109 33,552 48,218 627,590 Expected return on plan assets (359,588) (102,621) (8,634) (35,950) (41,166) (547,959) Effect of asset ceiling - - - 2,035 - 2,035 Total expense (income) 62,330 16,372 1,553 (188) 9,842 89,909 2017 Actual CPFL CPFL Piratininga CPFL RGE RGE Sul Total Service cost 707 3,153 73 270 2,153 6,356 Interest on actuarial obligations 476,613 127,561 11,431 37,395 50,927 703,927 Expected return on plan assets (392,819) (113,470) (9,437) (37,412) (43,258) (596,396) Total expense (income) 84,501 17,244 2,067 253 9,822 113,887 2016 Actual CPFL CPFL Piratininga CPFL RGE RGE Sul* Total Service cost 828 3,242 76 59 365 4,570 Interest on actuarial obligations 467,872 121,158 11,184 35,211 8,469 643,894 Expected return on plan assets (404,184) (115,608) (9,582) (35,632) (7,470) (572,476) Effect of asset ceiling - - - 520 - 520 Total expense (income) 64,514 8,791 1,677 158 1,364 76,505 (*) The expenses and income presented for RGE Sul are related to November and December 2016 2015 Actual CPFL CPFL Piratininga CPFL RGE RGE Sul Total Service cost 1,183 3,733 160 (131) - 4,945 Interest on actuarial obligations 425,465 110,425 9,944 31,490 - 577,324 Expected return on plan assets (375,527) (105,413) (9,691) (31,686) - (522,317) Effect of asset ceiling - - - 232 - 232 Total expense (income) 51,121 8,745 413 (95) - 60,184
Schedule for main assumptions taken into consideration in the actuarial calculation at the end of the reporting period	CPFL Paulista, CPFL Geração and CPFL Piratininga RGE RGE Sul Dec. 31, 2017 Dec. 31, 2016 Dec. 31, 2015 Dec. 31, 2017 Dec. 31, 2016 Dec. 31, 2015 Dec. 31, 2017 Dec. 31, 2016 Nominal discount rate for actuarial liabilities: 9,51% p.a. 10,99% p.a. 12,67% p.a. 9,51% p.a. 10,99% p.a. 12,67% p.a. 9,51% p.a. 10,99% p.a. Nominal Return Rate on Assets: 9,51% p.a. 10,99% p.a. 12,67% p.a. 9,51% p.a. 10,99% p.a. 12,67% p.a. 9,51% p.a. 10,99% p.a. Estimated Rate of nominal salary increase: 6,08% p.a. ** 7% p.a. 6,79% p.a. 6,13% p.a. 8,15% p.a. 6,79% p.a. 6,1% p.a. 7,29% p.a. Estimated Rate of nominal benefits increase: 4% p.a. 5% p.a. 5% p.a. 4% p.a. 5% p.a. 5% p.a. 4% p.a. 5% p.a. Estimated long-term inflation rate (basis for determining the nominal rates above) 4% p.a. 5% p.a. 5% p.a. 4% p.a. 5% p.a. 5% p.a. 4% p.a. 5% p.a. General biometric mortality table: AT-2000 (-10) AT-2000 (-10) AT-2000 (-10) BR-EMS sb v.2015 BR-EMS sb v.2015 AT-2000 (-10) BR-EMS sb v.2015 AT-2000 Biometric table for the onset of disability: Low Light Low Light Low Light Medium Light Medium Light Low Light Medium Light Medium Light Expected turnover rate: ExpR_2012 ExpR_2012* ExpR_2012* Null Null ExpR_2012* Null Null Likelihood of reaching retirement age: 100% when a beneficiary of the plan first becomes eligible 100% when a beneficiary of the plan first becomes eligible 100% when a beneficiary of the plan first becomes eligible 100% one year after when a beneficiary of the plan first becomes eligible 100% one year after when a beneficiary of the plan first becomes eligible 100% one year after when a beneficiary of the plan first becomes eligible 100% one year after when a beneficiary of the plan first becomes eligible 100% one year after when a beneficiary of the plan first becomes eligible (*) FUNCESP experience, with aggravation of 40% (**) Estimated rate of nominal salary increase for CPFL Piratininga was 6.39%
Schedule for assets managed by the plans	Assets managed by Fundação CESP Assets managed by Fundação CEEE CPFL Paulista and CPFL Geração CPFL Piratininga RGE RGE Sul 2017 2016 2017 2016 2017 2016 2017 2016 Fixed rate 77% 79% 80% 83% 79% 76% 78% 74% Federal governament bonds 53% 60% 49% 56% 64% 61% 65% 60% Corporate bonds (financial institutions) 4% 6% 7% 10% 9% 8% 8% 8% Corporate bonds (non financial institutions) 1% 1% 1% 1% 3% 4% 3% 4% Multimarket funds 2% 1% 2% 1% 2% 3% 1% 3% Other fixed income investments 17% 12% 22% 15% - - - - Variable income 15% 14% 14% 12% 18% 15% 18% 16% CPFL Energia's shares - 8% - 6% - - - - Investiment funds - shares 15% 6% 14% 7% 18% 15% 18% 16% Structured investments 3% 1% 3% 1% 1% 8% 1% 8% Equity funds - - - - 1% 7% 1% 7% Real estate funds - - - - 1% 1% 1% 1% Multimarket fund 3% 1% 3% 1% - - - - Total quoted in an active market 94% 94% 97% 97% 98% 98% 97% 98% Real estate 3% 3% 2% 2% 1% 1% 1% 1% Transactions with participants 1% 1% 2% 2% 2% 1% 2% 2% Other investments 1% 1% - - - - - - Escrow deposits and others 1% 1% - - - - - - Total not quoted in an active market 6% 6% 3% 3% 2% 2% 3% 2%
Schedule for fair value of the shares	Target for 2018 Fundação CESP (*) Fundação CEEE (*) CPFL Paulista and CPFL Geração CPFL Piratininga RGE RGE Sul Fixed income investments 72.80% 75.41% 80.50% 80.00% Variable income investments 18.67% 17.11% 16.00% 16.00% Real estate 3.18% 1.46% 0.50% 0.50% Transactions with participants 1.32% 1.61% 1.50% 2.00% Structured investments 2.56% 2.70% 1.50% 1.50% Investments abroad 1.47% 1.71% 0.00% 0.00% Total 100.00% 100.00% 100.00% 100.00%
Schedule for effects on the defined benefit obligation	Increase (Decrease) CPFL Paulista CPFL Piratininga CPFL Geração RGE RGE Sul Total Nominal discount (p.a.)* -0,25 p.p. 107,820 34,637 2,652 9,433 14,800 169,342 +0,25 p.p. (103,527) (33,051) (2,542) (9,027) (14,103) (162,250) General biometric mortality table** +1 year (101,296) (21,786) (2,334) (6,452) (9,244) (141,112) -1 year 99,533 21,195 2,296 6,273 8,990 138,287 * The assumption considered in the actuarial report for the nominal discount rate was 9.51% p.a. for all companies. The projected rates are increased or decreased by 0.25 p.p. to 9.26% p.a. and 9.76% p.a.. ** The assumption considered in the actuarial report for the mortality table was AT-2000 (-10) for CPFL Paulista, CPFL Piratininga and CPFL Geração; and BREMS sb v.2015 for RGE and RGE Sul. The projections were performed with 1 year of aggravation or softening on the respective mortality tables.

(19) REGULATORY CHARGES (Tables

(19) REGULATORY CHARGES (Tables)	12 Months Ended
	Dec. 31, 2017
Regulatory Charges Tables
Schedule of regulatory charges	Dec 31, 2017 Dec 31, 2016 Fee for the use of water resources 1,256 1,385 Global reversal reserve - RGR 17,545 17,469 ANEEL inspection fee - TFSEE 2,061 2,044 Energy development account - CDE 262,213 309,117 Tariff flags and others 298,525 36,064 Total 581,600 366,078

(20) TAXES, FEES AND CONTRIBU61

(20) TAXES, FEES AND CONTRIBUTIONS (Tables)	12 Months Ended
	Dec. 31, 2017
Taxes Fees And Contributions Tables
Schedule of taxes fees and contributions	Dec 31, 2017 Dec 31, 2016 Current IRPJ (corporate income tax) 59,026 42,793 CSLL (social contribution on net income) 22,430 14,434 Income tax and social contribution 81,457 57,227 ICMS (State VAT) 403,492 416,096 PIS (tax on revenue) 32,486 28,759 COFINS (tax on revenue) 141,757 126,939 Others 51,111 52,522 Other taxes 628,846 624,316 Total current 710,303 681,544 Noncurrent PIS (tax on revenue) 18,839 26,814

(21) PROVISION FOR TAX, CIVIL62

(21) PROVISION FOR TAX, CIVIL AND LABOR RISKS AND ESCROW DEPOSITS (Tables)	12 Months Ended
	Dec. 31, 2017
Provision For Tax Civil And Labor Risks And Escrow Deposits Tables
Schedule of provision for tax, civil and labor risks & escrow deposits	December 31, 2017 December 31, 2016 Provision for tax, civil and labor risks Escrow Provision for tax, civil and labor risks Escrow Labor 224,258 122,194 222,001 110,147 Civil 291,388 97,100 236,915 114,214 Tax FINSOCIAL 33,473 95,903 32,372 90,951 Income Tax 150,020 382,884 142,790 150,439 Others 163,798 140,289 113,227 84,091 347,291 619,077 288,389 325,481 Others 98,196 1,620 85,971 229 Total 961,134 839,990 833,276 550,072
Schedule of changes in the provision for tax, civil, labor and other risks	Dec 31, 2016 Additions Reversals Payments Monetary Restatements Business combination Dec 31, 2017 Labor 222,001 98,267 (39,052) (78,056) 26,915 (5,817) 224,258 Civil 236,915 108,147 (38,074) (115,162) 18,298 81,264 291,388 Tax 288,389 34,005 (7,188) (1,055) 20,351 12,791 347,291 Others 85,971 9,883 (2,508) (12,514) 5,391 11,974 98,196 Total 833,276 250,302 (86,822) (206,788) 70,954 100,212 961,134
Schedule of possible losses	Dec 31, 2017 Dec 31, 2016 Main reasons for claims Labor 686,538 668,005 Work accidents, risk premium for dangerousness at workplace and overtime Civil 1,178,671 1,004,279 Personal injury, environmental impacts and overfed tariffs Tax 5,100,151 4,611,077 ICMS, FINSOCIAL, PIS, COFINS, Social Contributions and Income tax Regulatory 140,695 93,827 Technical, commercial and economic-financial supervisions Total 7,106,055 6,377,188

(22) OTHER PAYABLES (Tables)

(22) OTHER PAYABLES (Tables)	12 Months Ended
	Dec. 31, 2017
Other Payables Tables
Schedule of other payables current and noncurrent	Current Noncurrent Dec 31, 2017 Dec 31, 2016 Dec 31, 2017 Dec 31, 2016 Consumers and concessionaires 93,068 73,864 44,473 44,711 Energy efficiency program - PEE 186,621 257,622 110,931 58,798 Research & Development - P&D 103,308 75,655 68,780 55,272 EPE/FNDCT/PROCEL 15,612 12,928 - - Reversion fund - - 17,750 17,750 Advances 300,214 163,054 22,255 8,029 Tariff discounts - CDE 25,040 8,891 - - Provision for socio environmental costs and asset retirement 16,360 13,703 107,814 61,828 Payroll 20,747 16,951 - - Profit sharing 80,518 56,215 16,273 11,400 Collections agreement 72,483 69,793 - - Guarantees - - 5,959 44,140 Business combination 6,927 9,492 - - Others 40,408 49,454 32,654 7,364 Total 961,306 807,623 426,889 309,292

(23) EQUITY (Tables)

(23) EQUITY (Tables)	12 Months Ended
	Dec. 31, 2017
Equity Tables
Schedule of shareholders interest	Number of shares December 31, 2017 December 31, 2016 Shareholders Common shares Interest % Common shares Interest % State Grid Brazil Power Participações S.A. 730,435,698 71.76% - 0.00% ESC Energia S.A. 234,086,204 23.00% 234,086,204 23.00% Camargo Correa S.A. 27,435 0.00% 5,897,311 0.58% Caixa de Previdência dos Funcionários do Banco do Brasil - Previ - 0.00% 299,787,559 29.45% Fundação CESP - 0.00% 51,048,952 5.02% Fundação Sistel de Seguridade Social - 0.00% 37,070,292 3.64% Energia São Paulo FIA - 0.00% 35,145,643 3.45% Fundação Petrobras de Seguridade Social - Petros - 0.00% 28,056,260 2.76% Bonaire Participações S.A. - 0.00% 1,249,386 0.12% Fundação Sabesp de Seguridade Social - Sabesprev - 0.00% 696,561 0.07% BNDES Participações S.A. - 0.00% 68,592,097 6.74% Antares Holdings Ltda. - 0.00% 16,967,165 1.67% Brumado Holdings Ltda. - 0.00% 36,497,075 3.59% Executive Officers 189 0.00% 34,250 0.00% Other shareholders 53,365,220 5.24% 202,785,991 19.92% Total 1,017,914,746 100.00% 1,017,914,746 100.00%
Schedule of profit allocation	2017 Profit for the year - Parent company 1,179,750 Realization of comprehensive income 25,873 Prescribed dividends 3,768 Profit base for allocation 1,209,391 Legal reserve (58,988) Statutory reserve - concession financial asset (123,673) Statutory reserve - working capital reinforcement (746,541) Mandatory dividend (280,191) Proposed additional dividend -
Schedule of changes in noncontrolling interests	CERAN CPFL Renováveis Paulista Lajeado Total As of December 31, 2014 214,454 2,171,911 67,427 2,453,794 Equity interests and voting capital 35.00% 48.39% 40.07% Equity attributable to noncontrolling interests 25,990 (20,611) 4,958 10,337 Dividends (6,173) (2,818) 843 (8,147) Other movements - 7 (48) (41) As of December 31, 2015 234,271 2,148,490 73,182 2,455,942 Equity interests and voting capital 35.00% 48.39% 40.07% Equity attributable to noncontrolling interests 38,621 (65,311) 4,862 (21,828) Dividends (9,172) (22,751) 1,096 (30,827) Other movements - 535 (1,176) (641) As of December 31, 2016 263,719 2,060,963 77,966 2,402,648 Equity interests and voting capital 35.00% 48.40% 40.07% Equity attributable to noncontrolling interests 37,949 13,720 11,623 63,292 Dividends (92,832) (16,619) (8,769) (118,220) Capital increase (reduction) (122,806) 15 - (122,791) Other movements - - (113) (113) As of December 31, 2017 86,031 2,058,079 80,707 2,224,816 Equity interests and voting capital 35.00% 48.40% 40.07%
Schedule of financial information of subsidiaries interests of noncontrolling shareholders	December 31, 2017 CERAN CPFL Renováveis Paulista Lajeado Current assets 110,566 1,623,645 48,037 Cash and cash equivalents 37,043 950,215 24,086 Noncurrent assets 848,445 11,232,357 120,677 Current liabilities 198,624 1,957,000 42,525 Borrowings and debentures 105,844 1,259,105 36,453 Other financial liabilities 12,360 7,258 264 Noncurrent liabilities 514,583 6,760,025 258 Borrowings and debentures 422,166 5,251,704 - Other financial liabilities 83,766 - - Equity 245,804 4,138,977 125,931 Attributable to owners of the Company 245,804 4,032,448 125,931 Attributable to noncontrolling interests - 106,529 - 2017 Net operating revenue 321,743 1,959,084 38,278 Operational costs and expenses (103,671) (737,472) (10,566) Depreciation and amortization (45,212) (617,017) (4) Interest income 30,489 126,041 2,089 Interest expense (40,202) (648,571) (4,050) Income tax expense (54,099) (74,125) (2,911) Profit (loss) for the year 108,427 19,645 29,006 Attributable to owners of the Company 108,427 11,484 29,006 Attributable to noncontrolling interests - 8,162 - December 31, 2016 CERAN CPFL Renováveis Paulista Lajeado Current assets 288,538 1,398,797 39,429 Cash and cash equivalents 238,241 908,982 24,688 Noncurrent assets 927,948 11,066,086 122,991 Current liabilities 121,646 1,313,466 9,586 Borrowings and debentures 60,162 889,981 324 Other financial liabilities 20,800 85,523 1,056 Noncurrent liabilities 341,356 6,713,610 36,404 Borrowings and debentures 254,732 5,517,890 36,167 Other financial liabilities 86,624 633 - Equity 753,484 4,437,807 116,431 Attributable to owners of the Company 753,484 4,324,589 116,431 Attributable to noncontrolling interests - 113,218 - 2016 Net operating revenue 301,179 1,646,589 30,820 Operational costs and expenses (67,242) (653,459) (27,404) Depreciation and amortization (48,082) (553,169) (3) Interest income 28,232 112,389 2,728 Interest expense (36,485) (591,626) (1,383) Income tax expense (55,596) (46,311) (1,137) Profit (loss) for the year 110,345 (143,706) 12,134 Attributable to owners of the Company 110,345 (151,900) 12,134 Attributable to noncontrolling interests - 8,195 - 2015 CERAN CPFL Renováveis Paulista Lajeado Net operating revenue 281,374 1,499,356 31,225 Operational costs and expenses (71,033) (498,005) (22,400) Depreciation and amortization (45,986) (540,578) (7) Interest income 17,532 115,639 2,243 Interest expense (40,801) (551,407) (1,206) Income tax expense (38,381) (49,221) (2,843) Profit (loss) for the year 74,256 (48,717) 12,374 Attributable to owners of the Company 74,256 (54,447) 12,374 Attributable to noncontrolling interests - 5,730 -

(24) EARNINGS PER SHARE (Tables

(24) EARNINGS PER SHARE (Tables)	12 Months Ended
	Dec. 31, 2017
Earnings Per Share Tables
Schedule of diluted earnings per share considering dilutive effects of instruments convertible	Earnings per share – basic and diluted The calculation of the basic and diluted earnings per share at December 31, 2017, 2016 and 2015 was based on the profit attributable to controlling shareholders and the weighted average number of common shares outstanding during the reporting years. For diluted earnings per share, the calculation considered the dilutive effects of instruments convertible into shares, as shown below: 2017 2016 2015 Numerator Profit attributable to controlling shareholders 1,179,750 900,885 864,940 Denominator Weighted average number of shares held by shareholders 1,017,914,746 1,017,914,746 (*) 1,017,914,746 Earnings per share - basic 1.16 0.89 0.85 Numerator Profit attributable to controlling shareholders 1,179,750 900,885 864,940 Dilutive effect of convertible debentures of subsidiary CPFL Renováveis (**) (11,966) (16,153) (19,811) Profit attributable to controlling shareholders 1,167,784 884,731 845,129 Denominator Weighted average number of shares held by shareholders 1,017,914,746 1,017,914,746 (*) 1,017,914,746 Earnings per share - diluted 1.15 0.87 0.83 (*) Considers the events occurred on April 29, 2016, related to the capital increase through the issuance of 24,900,531 shares (note 25). In accordance with IAS 33, when there is an increase in the number of shares without an increase in capital, the number of shares is adjusted as if the event had occurred at the beginning of the latest reporting period. (**) Proportional to the percentage of the Company's interest in the subsidiary in the respective years. The dilutive effect of the numerator in the calculation of diluted earnings per share takes into account the dilutive effects of the debentures convertible into shares issued by subsidiaries of the indirect subsidiary CPFL Renováveis. The calculation of the effects was based on the assumption that these debentures would have been converted into common shares of the subsidiaries at the beginning of each year.

(25) NET OPERATING REVENUE (Tab

(25) NET OPERATING REVENUE (Tables)	12 Months Ended
	Dec. 31, 2017
Net Operating Revenue Tables
Schedule of net operating revenue	Number of Consumers In GWh R$ thousand Revenue from Eletric Energy Operations 2017 (*) 2016 (*) 2015 (*) 2017 (*) 2016 (*) 2015 (*) 2017 2016 2015 Consumer class Residential 8,330,237 8,174,700 6,906,580 19,122 16,473 16,164 11,663,084 10,367,415 9,833,419 Industrial 59,825 61,112 55,586 14,661 13,022 12,748 5,095,840 5,281,978 5,526,967 Commercial 545,095 551,171 473,333 10,220 9,720 9,259 5,498,867 5,431,926 5,266,432 Rural 359,106 355,586 245,238 3,762 2,474 2,152 1,173,569 816,684 750,209 Public administration 60,639 61,208 51,359 1,456 1,271 1,278 787,967 690,389 702,152 Public lighting 11,230 11,073 10,362 1,964 1,746 1,649 654,950 580,229 545,597 Public services 9,790 9,649 8,402 2,157 1,840 1,797 978,286 901,662 879,288 (-) Adjustment of revenues from excess demand and excess reactive power - - - - - - (65,991) (72,129) (79,362) Billed 9,375,922 9,224,499 7,750,860 53,342 46,546 45,049 25,786,572 23,998,155 23,424,701 Own comsuption - - - 34 32 33 - - - Unbilled (net) - - - - - - (89,575) 50,441 202,729 (-) Transfer or revenue related to the network availability for Captive Consumers - - - - - - (9,273,840) (9,055,188) (8,118,085) Electricity sales to final consumers 9,375,922 9,224,499 7,750,860 53,376 46,578 45,082 16,423,157 14,993,408 15,509,345 Furnas Centrais Elétricas S.A. 3,026 3,034 3,026 565,592 533,855 485,846 Other concessionaires and licensees 16,337 12,252 10,656 3,240,571 2,371,091 2,223,339 (-) Transfer or revenue related to the network availability for Captive Consumers - - - (56,528) (50,598) (46,982) Spot market energy 8,194 6,173 4,289 2,340,463 641,744 875,002 Electricity sales to wholesalers 27,557 21,459 17,971 6,090,098 3,496,092 3,537,205 Revenue due to Network Usage Charge - TUSD - Captive Consumers 9,330,368 9,105,786 8,165,066 Revenue due to Network Usage Charge - TUSD - Free Consumers 2,137,566 2,057,327 1,898,138 (-) Adjustment of revenues from excess demand and excess reactive power (21,861) (17,908) (16,884) Revenue from construction of concession infrastructure 2,073,423 1,354,023 1,046,669 Sector financial asset and liability (Note 8) 1,900,837 (2,094,695) 2,506,524 Concession financial asset - Adjustment of expected cash flow (note 11) 204,443 186,148 393,343 Energy development account - CDE - Low-income, tariff discounts - judicial injunctions and other tariff discounts 1,419,128 1,266,027 895,538 Other revenues and income 496,340 438,377 367,356 Other operating revenues 17,540,244 12,295,084 15,255,750 Total gross operating revenue 40,053,498 30,784,584 34,002,212 Deductions from operating revenue ICMS (5,455,718) (4,935,068) (4,686,039) PIS (603,050) (471,836) (529,322) COFINS (2,777,626) (2,172,777) (2,438,208) ISS (15,929) (10,568) (8,204) Global reversal reserve - RGR (2,952) (4,230) (2,529) Energy development account - CDE (3,185,693) (3,360,613) (3,970,013) Research and development and energy efficiency (191,997) (138,583) (158,516) PROINFA (166,743) (121,800) (90,910) Tariff flags and others (878,460) (430,077) (1,796,226) IPI (102) (195) (100) FUST and FUNTEL (19) (38) (24) Others (30,304) (26,709) (22,997) (13,308,593) (11,672,495) (13,703,089) Net operating revenue 26,744,905 19,112,089 20,599,212
Schedule of distributors consumers average effects	Effect perceived by consumers (*) Subsidiary Total Group A Group B CPFL Paulista 32.28% 40.05% 27.27% CPFL Piratininga 29.78% 40.49% 21.47% RGE 37.16% 43.36% 33.04% RGE Sul 39.45% 43.76% 36.23% Companhia Luz e Força Santa Cruz 10.04% 10.53% 9.78% CPFL Leste Paulista 19.54% 24.74% 17.55% Companhia Jaguari de Energia (CPFL Santa Cruz) 23.01% 25.01% 18.79% CPFL Sul Paulista 21.95% 37.67% 13.86% CPFL Mococa 16.59% 23.84% 13.97% (*) Information not audited by the independent auditors
Schedule of periodic tariff review ("RTP") and annual tariff adjustment ("RTA")	2017 2016 2015 Subsidiary Month RTA Effect perceived by consumers (a) RTA / RTP Effect perceived by consumers (a) RTA / RTP Effect perceived by consumers (a) CPFL Paulista April -0.80% -10.50% 9.89% 7.55% 41.45% 4.67% CPFL Piratininga October 7.69% 17.28% -12.54% -24.21% 56.29% 21.11% RGE June 3.57% 5.00% -1.48% -7.51% 33.48% -3.76% RGE Sul April -0.20% -6.43% 3.94% -0.34% 52.45% 5.46% Companhia Luz e Força Santa Cruz March -1.23% -8.42% 22.51% 7.15% 34.68% 27.96% CPFL Leste Paulista March 0.77% -4.15% 21.04% 13.32% 20.80% 24.89% Companhia Jaguari de Energia (CPFL Santa Cruz) March 2.05% -2.56% 29.46% 13.25% 38.46% 45.70% CPFL Sul Paulista March 1.63% -10.73% 24.35% 12.82% 24.88% 28.38% CPFL Mococa March 1.65% -3.28% 16.57% 9.02% 23.34% 29.28%

(26) COST OF ELECTRIC ENERGY (T

(26) COST OF ELECTRIC ENERGY (Tables)	12 Months Ended
	Dec. 31, 2017
Cost Of Electric Energy Tables
Summary of cost of electric energy	In GWh R$ thousand 2017 (*) 2016 (*) 2015 (*) 2017 2016 2015 Electricity purchased for resale Itaipu Binacional 11,779 10,497 10,261 2,350,858 2,025,780 2,869,481 Spot market / PROINFA 3,595 2,253 4,004 560,153 269,792 981,009 Energy purchased through auction in the regulated market and bilateral contracts 62,600 51,225 44,342 14,269,265 8,541,677 9,192,868 PIS and COFINS credit - - - (1,562,779) (987,997) (1,196,579) Subtotal 77,974 63,975 58,607 15,617,498 9,849,252 11,846,779 Electricity network usage charge Basic network charges 1,541,629 834,341 847,342 Transmission from Itaipu 159,896 53,248 51,236 Connection charges 122,536 84,927 56,312 Charges for use of the distribution system 39,451 38,699 40,332 System service charges - ESS, net of transfers from CONER (452,978) 362,735 555,851 Reserve energy charges - EER (303) 106,925 54,762 PIS and COFINS credit (126,213) (129,883) (140,868) Subtotal 1,284,020 1,350,990 1,464,967 Total 16,901,518 11,200,242 13,311,747 (*) Information not audited by the independent auditors

(27) OPERATING COSTS AND EXPE68

(27) OPERATING COSTS AND EXPENSES (Tables)	12 Months Ended
	Dec. 31, 2017
Operating Costs And Expenses Tables
Schedule of operating cost and expences	2017 Cost of operation Cost of services rendered to third parties Operating Expenses Total Selling General and administrative Others Personnel 882,150 2 170,859 324,147 - 1,377,158 Private pension plans 113,887 - - - - 113,887 Materials 222,650 1,061 2,444 23,818 - 249,973 Third party services 251,549 1,856 186,525 287,201 - 727,151 Depreciation and amortization 1,143,795 - 5,403 93,639 - 1,242,837 Cost of infrastructure construction - 2,071,698 - - - 2,071,698 Others 157,113 (7) 225,000 218,247 438,494 1,038,847 Collection fees 11,710 - 68,757 - - 80,467 Allowance for doubtful accounts - - 155,097 - - 155,097 Leases and rentals 52,734 - (148) 19,740 - 72,326 Publicity and advertising 202 - 1 17,412 - 17,615 Legal, judicial and indemnities - - - 188,355 - 188,355 Donations, contributions and subsidies 88 - 2 3,924 - 4,014 Gain (loss) on disposal, retirement and other noncurrent assets - - - - 132,195 132,195 Amortization of concession intangible asset - - - - 286,215 286,215 Amortization of premium paid - GSF 9,594 - - - - 9,594 Financial compensation for use of water resources 8,656 - - - - 8,656 Impairment - - - - 20,437 20,437 Others 74,130 (7) 1,291 (11,184) (353) 63,877 Total 2,771,145 2,074,611 590,232 947,072 438,494 6,821,554 2016 Cost of operation Cost of services rendered to third parties Operating Expenses Total Selling General and administrative Others Personnel 686,434 1 134,864 272,618 - 1,093,918 Private pension plans 76,505 - - - - 76,505 Materials 164,168 1,412 8,191 16,175 - 189,946 Third party services 271,623 3,416 146,957 229,199 - 651,195 Depreciation and amortization 937,506 - 3,602 94,949 - 1,036,056 Cost of infrastructure construction - 1,352,214 - - - 1,352,214 Others 112,560 (11) 253,638 236,476 386,746 989,408 Collection fees - - 65,562 - - 65,562 Allowance for doubtful accounts - - 176,349 - - 176,349 Leases and rentals 42,163 - 113 17,109 - 59,385 Publicity and advertising 150 - 29 11,659 - 11,838 Legal, judicial and indemnities - - - 181,888 - 181,888 Donations, contributions and subsidies 54 - 9 2,425 - 2,488 Gain (loss) on disposal, retirement and other noncurrent assets - - - - 83,575 83,575 Amortization of concession intangible asset - - - - 255,110 255,110 Amortization of premium paid - GSF 9,594 - - - - 9,594 Financial compensation for use of water resources 12,233 - - - - 12,233 Impairment - - - - 48,291 48,291 Others 48,367 (11) 11,575 23,395 (231) 83,095 Total 2,248,795 1,357,032 547,251 849,419 386,746 5,389,240 2015 Cost of operation Cost of services rendered to third parties Operating Expenses Total Selling General and administrative Others Personnel 596,021 28 123,812 219,348 - 939,209 Private pension plans 60,184 - - - - 60,184 Materials 123,853 1,008 5,249 9,825 - 139,935 Third party services 187,080 2,777 128,022 241,115 - 558,994 Depreciation and amortization 870,427 - 21,826 84,985 - 977,238 Cost of infrastructure construction - 1,045,301 - - - 1,045,301 Others 69,633 (12) 185,673 308,226 357,653 921,173 Collection fees - - 56,990 - - 56,990 Allowance for doubtful accounts - - 126,879 - - 126,879 Leases and rentals 31,687 - (4) 16,874 - 48,558 Publicity and advertising 339 - 34 9,565 - 9,938 Legal, judicial and indemnities 10 - - 263,453 - 263,463 Donations, contributions and subsidies - - 16 3,418 - 3,434 Gain (loss) on disposal, retirement and other noncurrent assets - - - - 16,309 16,309 Amortization of concession intangible asset - - - - 302,665 302,665 Financial compensation for use of water resources 13,768 - - - - 13,768 Impairment - - - - 38,956 38,956 Others 23,829 (12) 1,759 14,916 (277) 40,214 Total 1,907,197 1,049,101 464,583 863,499 357,653 4,642,033

(28) FINANCE INCOME (COSTS) (Ta

(28) FINANCE INCOME (COSTS) (Tables)	12 Months Ended
	Dec. 31, 2017
Finance Income Costs Tables
Schedule of finance costs, net	2017 2016 2015 Finance Income Income from financial investments 457,255 667,429 472,745 Late payment interest and fines 265,455 246,045 215,923 Adjustment for inflation of tax credits 19,623 32,371 57,580 Adjustment for inflation of escrow deposits 49,502 35,228 84,683 Adjustment for inflation and exchange rate changes 60,999 147,849 121,609 Discount on purchase of ICMS credit 16,386 16,198 13,027 Adjustments to the sector financial asset (note 8) - 32,747 162,786 PIS and COFINS on other finance income (48,322) (63,223) (52,849) PIS and COFINS on interest on capital (27,798) (2,324) (6,941) Other 87,214 88,182 74,685 Total 880,314 1,200,503 1,143,247 Finance expenses Interest on debts (1,661,060) (1,811,263) (1,725,252) Adjustment for inflation and exchange rate changes (540,053) (703,128) (686,575) (-) Capitalized interest 50,543 68,082 45,568 Adjustments to the sector financial liability (note 8) (82,333) (25,079) (1,573) Use of public asset (8,048) (14,950) (16,028) Others (126,917) (167,638) (167,250) Total (2,367,868) (2,653,977) (2,551,110) Finance expenses, net (1,487,554) (1,453,474) (1,407,863) Interests were capitalized at an average rate of 8.54% p.a. (10.9% p.a. in 2016 and 10.25% p.a. in 2015) on qualifying assets, in accordance with IAS 23. In line items Adjustment for inflation and exchange rate changes, the amounts include the effects of losses of R$235,852 (losses of R$ 1,399,988 in 2016 and gains of R$ 1,514,439 in 2015) on derivative instruments (note 33).

(29) SEGMENT INFORMATION (Table

(29) SEGMENT INFORMATION (Tables)	12 Months Ended
	Dec. 31, 2017
Segment Information Tables
Schedule of information segregated by segment	Distribution Generation Generation Commercialization Services Total Others (*) Elimination Total 2017 Net operating revenue 21,068,435 741,842 1,489,932 3,402,804 40,611 26,743,623 1,281 - 26,744,905 (-) Intersegment revenues 8,182 448,421 469,152 11,297 444,935 1,381,988 - (1,381,988) - Cost of electric energy (14,146,703) (147,379) (348,029) (3,196,028) - (17,838,139) - 936,621 (16,901,518) Operating costs and expenses (4,695,480) (156,340) (389,443) (47,296) (398,188) (5,686,747) (51,121) 445,366 (5,292,502) Depreciation and amortization (763,739) (123,129) (617,017) (3,054) (19,760) (1,526,699) (2,353) - (1,529,052) Income from electric energy service 1,470,695 763,415 604,596 167,724 67,598 3,074,028 (52,193) - 3,021,834 Equity - 312,390 - - - 312,390 - - 312,390 Finance income 597,133 102,713 137,746 19,117 10,693 867,402 12,912 - 880,314 Finance expenses (1,163,600) (431,289) (648,571) (52,023) (6,445) (2,301,928) (65,939) - (2,367,868) Profit (loss) before taxes 904,228 747,229 93,770 134,818 71,846 1,951,891 (105,220) - 1,846,670 Income tax and social contribution (299,510) (95,688) (74,125) (44,527) (16,994) (530,844) (72,784) - (603,629) Attributable to controlling shareholders 604,717 651,541 19,645 90,290 54,852 1,421,045 (178,004) - 1,243,042 Attributable to controlling shareholders 604,717 601,969 3,382 90,290 54,852 1,355,211 (178,004) - 1,177,206 Attributable to noncontrolling interests - 49,572 16,263 - - 65,835 - - 65,836 Total assets (**) 22,278,452 4,287,337 12,815,017 931,546 374,435 40,686,787 596,125 - 41,282,912 Purchases of PP&E and intangible assets 1,882,502 8,973 621,046 2,927 54,149 2,569,598 835 - 2,570,433 - 2016 Net operating revenue 15,017,166 593,775 1,334,571 2,024,350 81,595 19,051,456 60,633 - 19,112,089 (-) Intersegment revenues 22,526 409,338 338,357 62,757 318,770 1,151,748 8,661 (1,160,410) - Cost of electric energy (9,747,720) (98,521) (272,125) (1,876,952) - (11,995,318) - 795,075 (11,200,242) Operating costs and expenses (3,447,081) (106,364) (407,673) (47,548) (322,131) (4,330,797) (132,611) 365,334 (4,098,074) Depreciation and amortization (591,334) (126,596) (553,169) (3,779) (12,870) (1,287,748) (3,417) - (1,291,166) Income from electric energy service 1,253,557 671,631 439,961 158,829 65,363 2,589,342 (66,734) - 2,522,608 Equity - 311,414 - - - 311,414 - - 311,414 Finance income 781,365 182,574 132,653 31,513 10,742 1,138,848 61,655 - 1,200,503 Finance costs (1,331,973) (562,196) (667,344) (24,761) (5,272) (2,591,546) (62,432) - (2,653,978) Profit (loss) before taxes 702,950 603,424 (94,730) 165,581 70,832 1,448,057 (67,510) - 1,380,547 Income tax and social contribution (295,748) (98,530) (46,311) (53,225) (17,019) (510,833) 9,343 - (501,490) Profit (loss) for the year 407,202 504,894 (141,041) 112,357 53,813 937,225 (58,167) - 879,057 Attributable to controlling shareholders 407,202 461,411 (75,731) 112,357 53,813 959,052 (58,167) - 900,885 Attributable to noncontrolling interests - 43,483 (65,311) - - (21,828) - - (21,828) Total assets (**) 22,887,781 5,310,924 12,459,791 466,021 345,372 41,469,889 701,103 - 42,170,992 Purchases of PP&E and intangible assets 1,200,621 7,564 978,896 3,713 42,954 2,233,748 4,199 - 2,237,949 2015 Net operating revenue 16,945,222 572,553 1,262,297 1,716,348 55,547 20,551,967 47,246 - 20,599,212 (-) Intersegment revenues 22,318 411,038 335,979 82,544 239,088 1,090,966 3,136 (1,094,101) - Cost of electric energy (11,934,217) (223,495) (260,091) (1,629,793) - (14,047,596) - 735,849 (13,311,747) Operating costs and expenses (2,889,495) (85,388) (336,834) (39,632) (251,385) (3,602,734) (117,649) 358,257 (3,362,126) Depreciation and amortization (587,059) (131,969) (540,578) (4,534) (12,633) (1,276,773) (3,128) - (1,279,903) Income from electric energy service 1,556,770 542,738 460,772 124,933 30,617 2,715,830 (70,396) - 2,645,434 Equity - 216,885 - - - 216,885 - - 216,885 Finance income 740,628 110,018 131,354 42,840 44,098 1,068,938 74,310 - 1,143,247 Finance costs (1,256,801) (549,286) (599,303) (38,386) (4,858) (2,448,634) (102,477) - (2,551,110) Profit (loss) before taxes 1,040,597 320,354 (7,176) 129,386 69,857 1,553,017 (98,563) - 1,454,454 Income tax and social contribution (414,633) (37,570) (49,222) (41,282) (18,232) (560,939) (18,239) - (579,177) Profit (loss) for the year 625,965 282,783 (56,398) 88,104 51,625 992,079 (116,802) - 875,277 Attributable to controlling shareholders 625,965 251,831 (35,781) 88,104 51,625 981,744 (116,802) - 864,942 Attributable to noncontrolling interests - 30,954 (20,617) (0) - 10,337 - - 10,337 Total assets (**) 22,138,086 4,575,230 11,868,943 714,781 317,845 39,614,885 917,586 - 40,532,471 Purchases of PP&E and intangible assets 868,495 6,910 493,584 2,432 39,176 1,410,597 17,199 - 1,427,796

(30) RELATED PARTY TRANSACTIO71

(30) RELATED PARTY TRANSACTIONS (Tables)	12 Months Ended
	Dec. 31, 2017
Related Party Transactions Tables
Schedule of transactions between related parties	ASSETS LIABILITIES INCOME EXPENSES December 31, 2017 December 31, 2016 December 31, 2017 December 31, 2016 2017 2016 2015 2017 2016 2015 Advances BAESA – Energética Barra Grande S.A. - - 691 726 - - - - - - Foz do Chapecó Energia S.A. - - 979 1,025 - - - - - - ENERCAN - Campos Novos Energia S.A. - - 1,212 1,269 - - - - - - EPASA - Centrais Elétricas da Paraiba - - 440 462 - - - - - - Energy purchases and sales, and charges Entities under common control (Subsidiaries of State Grid Corporation of China)* - - 13,330 - - - - 91,302 - - BAESA – Energética Barra Grande S.A. - - 13,169 5,642 - - 6,080 80,362 60,765 111,541 Foz do Chapecó Energia S.A. - - 37,415 35,018 - 215 4,996 381,193 358,272 330,675 ENERCAN - Campos Novos Energia S.A. 823 387 51,381 50,526 8,763 3,684 23,283 281,530 269,480 244,102 EPASA - Centrais Elétricas da Paraiba - - 19,458 12,418 - - 15,243 137,376 91,010 168,187 Intangible assets, property, plant and equipment, materials and services rendered BAESA – Energética Barra Grande S.A. 153 56 - - 1,582 521 1,354 - - - Foz do Chapecó Energia S.A. 2 104 - - 1,726 1,424 1,483 - - - ENERCAN - Campos Novos Energia S.A. 152 74 - - 1,665 1,826 1,354 - - - EPASA - Centrais Elétricas da Paraíba S.A. 416 1,599 - - (469) 488 720 - - - Intragroup loans EPASA - Centrais Elétricas da Paraíba S.A. - 38,078 - - 327 4,379 14,123 - - - Noncontrolling shareholders - CPFL Renováveis 8,612 9,067 - - (253) 1,039 1,475 - - - Dividend and interest on own capital BAESA – Energética Barra Grande S.A. 108 89 - - - - - - - - Chapecoense Geração S.A. 32,734 29,329 - - - - - - - - ENERCAN - Campos Novos Energia S.A. 21,184 40,983 - - - - - - - - Others Instituto CPFL - - - - - - - 3,613 - - ASSETS LIABILITIES INCOME EXPENSES Dec. 31, 2016 Dec. 31, 2016 2016 2015 2016 2015 Bank balances and short-term investments Banco Bradesco S.A.(***) - - - 351,086 - 312 Banco do Brasil S.A. 48,985 - 4,113 28,466 5 4 Borrowings (**), debentures (**) and derivatives (**) Banco Bradesco S.A.(***) - - - - - 85,505 Banco do Brasil S.A. - 4,257,562 800 - 463,949 459,889 Banco BNP Paribas Brasil S.A 5,126 - - - 67,196 8,978 Other financial transactions Banco Bradesco S.A.(***) - - - 166 - 4,174 Banco do Brasil S.A. - 962 234 80 6,408 5,941 Energy purchases and sales, and charges AES Tiete S.A. (****) - - 2 - 14,498 - Afluente Transmissão de Energia Elétrica S.A. - 53 - - 1,212 1,426 Aliança Geração de Energia S.A - 1,183 4 1 49,944 34,063 Alpargatas S.A. (****) - 2,954 - - - Arizona 1 Energia Renovável S.A - - - - 967 883 Baguari I Geração de Energia Elétrica S.A. - 6 - - 294 268 BRF Brasil Foods - - 20,190 - - - Caetite 2 Energia Renovável S.A. - - - - 889 810 Caetité 3 Energia Renovável S.A. - - - - 896 817 Calango 1 Energia Renovável S.A. - - - - 1,073 977 Calango 2 Energia Renovável S.A. - - - - 916 834 Calango 3 Energia Renovável S.A. - - - - 1,072 977 Calango 4 Energia Renovável S.A. - - - - 995 907 Calango 5 Energia Renovável S.A. - - - - 1,054 963 Companhia de Eletricidade do Estado da Bahia – COELBA 743 121 19,296 14,491 121 46 Companhia Energética de Pernambuco - CELPE 692 20 9,829 7,062 250 206 Companhia Energética do Rio Grande do Norte - COSERN 267 - 3,128 2,580 - - Companhia Hidrelétrica Teles Pires S.A. - 1,416 57 17 53,710 29,915 ELEB Equipamentos Ltda - - - 4,036 - - Embraer - - 6,938 26,615 - - Energética Águas da Pedra S.A. - 112 6 2 4,716 4,260 Estaleiro Atlântico Sul S.A. - - 7,978 19,026 - - Goiás Sul Geração de Enegia S.A. - - - - 181 166 InterCement Brasil S.A - - 2 1 - - Itapebi Geração de Energia S.A - - 3 1 - - Mel 2 Energia Renovável S.A. - - - - 718 632 NC ENERGIA S.A. 451 2 28,298 5,336 6 - Norte Energia S.A. 1 4,585 17 1 61,240 - Rio PCH I S.A. - 209 - - 8,865 8,004 Samarco Mineração S.A. - - 2 1 - - Santista Jeanswear S/A - - 13,600 4,491 - - Santista Work Solution S/A - - 2,224 - - - SE Narandiba S.A. - 2 - - 152 166 Serra do Facão Energia S.A. - SEFAC - 557 - - 23,153 20,916 Termopernambuco S.A. - - 5 3 - - ThyssenKrupp Companhia Siderúrgica do Atlântico - - 25,268 37,238 7,683 6,965 Tupy - - - - 27,127 - Vale Energia S.A. 8,680 - 102,069 92,353 216 695 Intangible assets, property, plant and equipment, materials and services rendered Alpargatas S.A. (***) 168 - 2,310 - - - Afluente Transmissão de Energia Elétrica S.A. - - - - 5 - Banco Bradesco S.A.(***) - - - - - 19 Banco do Brasil S A - - - - 6 170 Brasil veículos Companhia de Seguros - - 2 - - - BRF Brasil Foods - - 1,250 - - - Companhia de Saneamento Básico do Estado de São Paulo - SABESP 4 42 170 1,034 94 31 Companhia Brasileira de Soluções e Serviços CBSS - Alelo (***) - - - - - 576 Companhia de Eletricidade do Estado da Bahia – COELBA - - - - - 50 Concessionária Auto Raposo Tavares S.A. - CART - - - 15 - Concessionária de Rodovias do Oeste de São Paulo – ViaOeste S.A. - - - - 6 - Concessionária do Sistema Anhanguera - Bandeirante S.A. 86 - - - 10 9 Estaleiro Atlântico Sul S.A. - - 9 - - - Ferrovia Centro-Atlântica S.A. - - - - 24 22 HM 02 Empreendimento Imobiliário SPE Ltda. - - 45 - - - HM Engenharia e Construções S.A. - - - 272 - - Indústrias Romi S.A. 4 - 51 68 - - InterCement Brasil S.A - - 43 26 - - Oi Móvel S.A (***) - - - - 302 - Logum Logística S.A. 26 - 730 55 - - LUPATECH - - - - - 2 Mapfre Seguros Gerais S.A. (***) - - - 4 - 1 NC Energia S.A. - - 17 - - - Renovias Concessionária S.A. - - - - 17 - Rodovias Integradas do Oeste S.A. - - - 3 - SAMM - Sociedade de Atividades em Multimídia Ltda. - - 1,410 1,463 Santista Jeanswear S/A - 1 21 - - Tim Celular S.A. (***) 6 89 2,008 - 12 - TOTVS S.A. 2 2 - 32 44 Ultrafértil S.A - 14 868 - - Vale Energia S.A. - 331 - - - Vale S.A. - - - - 11 - Vale Fertilizantes S.A - - 45 - - (**) The balances include the mark to market adjustments (***) Related party until December 2015 (****) Related party from January 2016

(31) INSURANCE (Tables)

(31) INSURANCE (Tables)	12 Months Ended
	Dec. 31, 2017
Insurance Tables
Schedule of principal insurance policies	Description Type of cover Dec. 31, 2017 Dec. 31, 2016 (*) 31/12/2015 (*) Concession financial asset / Intangible assets Fire, lightening, explosion, machinery breakdown, electrical damage and engineering risk 7,440,359 9,679,825 8,634,344 Transport National transport 302,364 416,358 319,834 Stored materials Fire, lightning, explosion and robbery 229,496 232,849 171,585 Automobiles Comprehensive cover 16,779 13,235 6,544 Civil liability Electric energy distributors 263,000 200,000 118,000 Personnel Group life and personal accidents 694,341 234,357 202,989 Others Operational risks and others 158,340 281,914 323,200 Total 9,104,679 11,058,537 9,776,496 (*) Information not audited by independent auditors

(33) FINANCIAL INSTRUMENTS (Tab

(33) FINANCIAL INSTRUMENTS (Tables)	12 Months Ended
	Dec. 31, 2017
Financial Instruments Tables
Schedule of financial instruments classification	December 31, 2017 Note Category Measurement Level (*) Carrying amount Fair value Asset Cash and cash equivalent 5 (a) (2) Level 1 2,289,302 2,289,302 Cash and cash equivalent 5 (a) (2) Level 2 960,340 960,340 Derivatives 33 (a) (2) Level 2 595,872 595,872 Derivatives - zero-cost collar 33 (a) (2) Level 3 52,058 52,058 Concession financial asset - distribution 10 (b) (2) Level 3 6,330,681 6,330,681 10,228,253 10,228,253 Liability Borrowings - principal and interest 16 (c) (1) Level 2 (***) 6,142,583 5,912,175 Borrowings - principal and interest (**) 16 (a) (2) Level 2 4,849,474 4,849,474 Debentures - Principal and interest 17 (c) (1) Level 2 (***) 9,176,527 7,581,432 Derivatives 33 (a) (2) Level 2 94,806 94,806 20,263,390 18,437,887 (*) Refers to the hierarchy for determination of fair value (**) As a result of the initial designation of this financial liability, the consolidated financial statements reported a gain of R$ 21,137 in 2017 (a loss of R$ 274,834 in 2016) (***) Only for disclosure purposes, in accordance with IFRS 7 Key Category: Measurement: (a) - Measured at fair value through profit or loss (1) - Measured at amortized cost (b) - Available for sale (2) - Measured at fair value (c) - Other finance liabilities
Schedule of derivative transactions	Fair values (carrying amounts) Company / strategy / counterparts Assets Liabilities Fair value, net Values at Gain (loss) on marking to market Currecy / index Maturity range Notional Derivatives to hedge debts designated at fair value Exchange rate hedge CPFL Paulista Bank of Tokyo-Mitsubishi 34,627 - 34,627 35,864 (1,237) dollar March 2019 117,400 Bank of America Merrill Lynch 42,466 - 42,466 42,830 (363) dollar September 2018 106,020 Bank of America Merrill Lynch 48,135 - 48,135 48,802 (667) dollar March 2019 116,600 J.P.Morgan 24,067 - 24,067 24,401 (334) dollar March 2019 58,300 J.P.Morgan 13,808 - 13,808 13,659 149 dollar January 2019 67,613 Bank of Tokyo-Mitsubishi 14,124 - 14,124 22,015 (7,891) dollar February 2020 142,735 Bank of America Merrill Lynch 89,684 - 89,684 89,289 395 dollar February 2018 405,300 Bank of America Merrill Lynch - (5,236) (5,236) (1,653) (3,583) dollar October 2018 329,500 Bradesco - (5,163) (5,163) (4,068) (1,095) dollar May 2021 59,032 Bank of America Merrill Lynch - (4,805) (4,805) (4,055) (750) dollar May 2021 59,032 Citibank - (4,971) (4,971) (4,062) (910) dollar May 2021 59,032 Citibank - (4,948) (4,948) (4,080) (868) dollar May 2021 59,032 266,911 (25,124) 241,787 258,941 (17,154) CPFL Piratininga Citibank 45,457 - 45,457 47,966 (2,509) dollar March 2019 117,250 Bradesco 27,046 - 27,046 27,257 (211) dollar April 2018 55,138 J.P.Morgan 27,050 - 27,050 27,259 (209) dollar April 2018 55,138 Citibank 30,880 - 30,880 35,979 (5,099) dollar January 2020 169,838 BNP Paribas 37,212 - 37,212 36,649 563 euro January 2018 175,714 Bradesco - (5,163) (5,163) (4,068) (1,095) dollar May 2021 59,032 Bank of America Merrill Lynch - (4,805) (4,805) (4,055) (750) dollar May 2021 59,032 Citibank - (4,971) (4,971) (4,062) (910) dollar May 2021 59,032 Bank of America Merrill Lynch - (2,339) (2,339) (2,035) (304) dollar May 2021 29,516 Citibank - (2,474) (2,474) (2,040) (434) dollar May 2021 29,516 167,645 (19,753) 147,891 158,850 (10,959) RGE Bank of Tokyo-Mitsubishi 22,785 - 22,785 23,054 (270) dollar April 2018 36,270 Bank of Tokyo-Mitsubishi 101,289 - 101,289 102,467 (1,178) dollar May 2018 168,346 Bank of Tokyo-Mitsubishi 374 - 374 1,313 (939) dollar October 2018 169,260 Bradesco - (5,163) (5,163) (4,068) (1,095) dollar May 2021 59,032 Bank of America Merrill Lynch - (4,805) (4,805) (4,055) (750) dollar May 2021 59,032 Citibank - (4,971) (4,971) (4,062) (910) dollar May 2021 59,032 Bank of America Merrill Lynch - (4,678) (4,678) (4,070) (609) dollar May 2021 59,032 124,448 (19,619) # 104,829 110,579 (5,750) Companhia Jaguari de Energia (CPFL Santa Cruz) Scotiabank - (1,167) (1,167) (1,327) 160 dollar July 2019 65,936 CPFL Paulista Lajeado Itaú 598 - 598 557 41 dollar March 2018 35,000 CPFL Brasil Scotiabank - (1,537) (1,537) (1,608) 71 dollar August 2018 45,360 Scotiabank 6,243 - 6,243 10,610 (4,367) dollar September 2020 249,989 Scotiabank 3,964 - 3,964 6,674 (2,709) dollar October 2020 150,011 10,208 (1,537) # 8,671 15,676 (7,005) CPFL Geração Scotiabank - (2,070) (2,070) (2,355) 286 dollar July 2019 117,036 Votorantim - (5,339) (5,339) (5,316) (23) dollar June 2019 104,454 Bradesco - (103) (103) 433 (536) dollar September 2019 32,636 Citibank - (10,985) (10,985) (613) (10,372) dollar September 2020 397,320 Scotiabank - (9,110) (9,110) (9,278) 167 dollar December 2019 174,525 - (27,607) (27,607) (17,129) (10,478) Subtotal 569,809 (94,806) 475,004 526,148 (51,145) Derivatives to hedge debts not designated at fair value Price index hedge CPFL Geração Santander 10,263 - 10,263 8,344 1,919 IPCA April 2019 35,235 J.P.Morgan 10,263 - 10,263 8,344 1,919 IPCA April 2019 35,235 20,525 - 20,525 16,688 3,837 Interest rate hedge (1) CPFL Paulista J.P.Morgan 1,112 - 1,112 255 857 CDI February 2021 300,000 Votorantim 380 - 380 87 293 CDI February 2021 100,000 Santander 401 - 401 92 309 CDI February 2021 105,000 1,893 - 1,893 434 1,459 CPFL Piratininga Votorantim 536 - 536 122 414 CDI February 2021 135,000 Santander 402 - 402 91 310 CDI February 2021 100,000 938 - 938 213 724 RGE Votorantim 620 - 620 143 477 CDI February 2021 170,000 CPFL Geração Votorantim 2,088 - 2,088 403 1,685 CDI August 2020 460,000 Subtotal 26,063 - 26,063 17,881 8,182 Other derivatives (2) CPFL Geração Itaú 18,126 - 18,126 - 18,126 dollar September 2020 19,975 Votorantim 14,948 - 14,948 - 14,948 dollar September 2020 19,975 Santander 18,984 - 18,984 - 18,984 dollar September 2020 25,248 Subtotal 52,058 - 52,058 - 52,058 Total 647,930 (94,806) 553,124 544,029 9,095 Current 444,029 (10,230) Noncurrent 203,901 (84,576) For further details on terms and information on debts and debentures, see notes 16 and 17 (1) The interest rate hedge swaps have half-yearly validity, so the notional value reduces according to the amortization of the debt. (2) Due to the characteristics of this derivative (zero-cost collar), the notional amount is presented in U.S. dollar (3)The values at cost are the derivative amount without the respective mark to market, while the notional refers to the contracted accrual.
Schedule of derivatives	December 31, 2016 Interests and monetary restatements Repayments of principal December 31, 2017 Derivatives to hedge debts designated at fair value 602,476 (189,466) 113,138 526,148 to hedge debts not designated at fair value 7,181 (1,175) 11,875 17,881 Others (zero-cost collar) - 22,372 (22,372) - Mark-to-market (*) 76,679 (67,584) - 9,095 686,336 (235,853) 102,641 553,124 (*) The effects on profit or loss for the year ended December 31, 2017 related to the fair value adjustments (MTM) of the derivatives are: (i) a loss of R$ 75,649 for debts designated at fair value, (ii) a gain of R$ 13,722 for debts not designated at fair value and (iii) a loss of R$ 5,657 for other derivatives (zero-cost collar).
Schedule of effects of derivative instruments on adjustments for inflation and exchange rate changes	Gain (Loss) Company Hedged risk / transaction 2017 2016 2015 CPFL Energia Exchange variation - (76,202) 71,492 CPFL Energia Mark to Market - 2,319 (2,319) CPFL Paulista Interest rate variation 304 (1,423) (2,250) CPFL Paulista Exchange variation (89,612) (802,479) 843,224 CPFL Paulista Mark to Market (25,410) 118,663 (98,738) CPFL Piratininga Interest rate variation 175 (661) (609) CPFL Piratininga Exchange variation (19,799) (358,412) 300,652 CPFL Piratininga Mark to Market (18,999) 48,193 (32,431) RGE Interest rate variation 115 (835) (1,321) RGE Exchange variation (27,237) (252,321) 291,612 RGE Mark to Market (10,679) 48,915 (29,946) CPFL Geração Interest rate variation 852 3,161 2,600 CPFL Geração Exchange variation (41,793) (145,933) 122,294 CPFL Geração Mark to Market (6,033) 66,425 (7,896) CPFL Santa Cruz Exchange variation (947) (6,986) 9,899 CPFL Santa Cruz Mark to Market 120 148 (80) CPFL Leste Paulista Exchange variation (947) (1,076) 4,596 CPFL Leste Paulista Mark to Market 120 (80) (76) CPFL Sul Paulista Exchange variation (947) (7,577) 12,404 CPFL Sul Paulista Mark to Market 120 170 (83) CPFL Jaguari Exchange variation (947) (10,236) 16,616 CPFL Jaguari Mark to Market 120 273 (63) CPFL Mococa Exchange variation - - 2,022 CPFL Mococa Mark to Market - - (33) Paulista Lajeado Exchange variation (2,052) (11,046) 4,626 Paulista Lajeado Mark to Market 66 1,649 (1,675) CPFL Telecom Exchange variation - - 3,204 CPFL Telecom Mark to Market - - 6 CPFL Brasil Exchange variation 14,567 (13,857) 5,367 CPFL Brasil Mark to Market (7,009) 2,383 (2,378) CPFL Serviços Exchange variation - (3,420) 3,810 CPFL Serviços Mark to Market - 254 (87) (235,852) (1,399,988) 1,514,439
Schedule of call and put options for zero-cost collar instruments	Assets Liabilities Net As of December 31, 2015 8,820 (2,440) 6,380 Measurement at fair value 65,546 2,440 67,986 Net cash received from settlement of flows (16,651) - (16,651) As of December 31, 2016 57,715 - 57,715 Measurement at fair value 16,715 - 16,715 Net cash received from settlement of flows (22,372) - (22,372) As of December 31, 2017 52,058 - 52,058
Schedule of financial instrument type	Decrease (increase) Instruments Exposure Risk Currency depreciation (b) Currency appreciation / depreciation of 25% (c) Currency appreciation / depreciation of 50% (c) Financial liability instruments (4,641,924) (209,785) 1,003,142 2,216,070 Derivatives - Plain Vanilla Swap 4,687,768 211,857 (1,013,050) (2,237,956) 45,844 drop in the dollar 2,072 (9,908) (21,886) Financial liability instruments (218,814) (14,978) 43,470 101,918 Derivatives - Plain Vanilla Swap 219,694 15,038 (43,645) (102,328) 880 drop in the euro 60 (175) (410) Total 46,724 2,132 (10,083) (22,296) Decrease (increase) Instruments Exposure Risk Currency depreciation (b) Currency appreciation / depreciation of 25%(c) Currency appreciation / depreciation of 50%(c) Derivatives - Zero-cost collar 65,197 (d) dollar apprec. (56,138) (80,491) (104,844) (a) The exchange rates considered as of December 31, 2017 were R$ 3,31 per US$ 1.00 and R$ 3,97 per € 1.00. (b) As per the exchange curves obtained from information made available by B3 S.A., with the exchange rate being considered at R$ 3,46 and R$ 4,24, and exchange depreciation at 4,52% and 6,85%, for the US$ and €, respectively. (c) As required by CVM Instruction 475/2008, the percentage increases in the ratios applied refer to the information made available by the B3 S.A.. (d) Owing to the characteristics of this derivative (zero-cost collar), the notional amount is presented in US$.
Schedule of interest rate variation	Decrease (increase) Instruments Exposure Risk Scenario I (a) Raise/drop of Raise/drop of Financial asset instruments 3,770,045 (3,016) 61,169 125,354 Financial liability instruments (8,988,008) 7,190 (145,830) (298,851) Derivatives - Plain Vanilla Swap (4,501,345) 3,601 (73,034) (149,670) (9,719,308) CDI apprec. 7,775 (157,695) (323,167) Financial liability instruments (57,291) IGP-M apprec. (2,286) (2,783) (3,280) Financial liability instruments (3,944,876) TJLP apprec. 9,862 (56,708) (123,277) Financial liability instruments (1,311,432) (14,557) (1,869) 10,819 Derivatives - Plain Vanilla Swap 94,949 1,054 135 (783) Concession financial asset 6,330,681 70,271 9,021 (52,228) 5,114,198 drop in the IPCA 56,768 7,287 (42,192) Sector financial asset and liability 517,341 (14,692) (23,565) (32,437) Financial liability instruments (139,926) 3,974 6,374 8,773 377,415 drop in the SELIC (10,718) (17,191) (23,664) Total (8,229,862) 61,401 (227,090) (515,580) * The CDI, IGP-M, TJLP, IPCA and SELIC indexes considered of 6,81%, 3,47%, 6,75%, 3,87% and 6,86%, respectively, were obtained from information available in the market. ** In compliance with CVM Instruction 475/08, the percentage of raise/drop of indexes were applied to Scenario I indexes.
Schedule of liquidity analysis	December 31, 2017 Note Weighted average interest rates Less than 1 month 1-3 months 3 months to 1 year 1-3 years 4-5 years More than 5 years Total Trade payables 15 3,524,624 16,307 7,418 - - 128,438 3,676,787 Borrowings - principal and interest 16 7.95% p.a. 336,255 947,051 2,904,702 5,267,176 1,485,520 2,421,543 13,362,247 Derivatives 33 39 523 14,160 32,258 59,801 - 106,781 Debentures - principal and interest 17 7.83% p.a. 35,930 544,995 1,541,223 5,378,610 1,938,783 1,350,776 10,790,317 Regulatory charges 19 581,600 - - - - - 581,600 Use of public asset 9.24% p.a. 1,645 3,305 14,979 42,579 46,788 149,061 258,357 Others 22 106,515 56,186 18,212 - - 62,223 243,136 Consumers and concessionaires 60,298 25,844 6,926 - - 44,473 137,541 EPE / FNDCT / PROCEL 849 3,226 11,286 - - - 15,361 Collections agreement 45,368 27,116 - - - - 72,484 Reversal fund - - - - - 17,750 17,750 Total 4,586,608 1,568,367 4,500,694 10,720,623 3,530,892 4,112,041 29,019,225

(34) COMMITTMENTS (Tables)

(34) COMMITTMENTS (Tables)	12 Months Ended
	Dec. 31, 2017
Committments Tables
Schedule of commitments	The Group’s commitments at December 31, 2017 are as follows: Commitments at December 31, 2017 Duration Less than 1 year 1-3 years 4-5 years More than 5 years Total Operational leasings Up to 15 years 16,579 29,440 25,053 155,169 226,241 Energy purchase agreements (except Itaipu) Up to 28 years 10,870,752 18,433,971 17,250,704 41,537,486 88,092,913 Energy purchase from Itaipu Up to 28 years 2,281,157 4,564,825 4,478,641 13,133,756 24,458,379 Energy system service charges Up to 32 years 2,613,587 5,758,898 6,599,478 17,997,838 32,969,801 GSF renegotiation Up to 30 years 26,997 13,267 47,284 276,207 363,755 Power plant constrution projects Up to 3 years 97,176 11,319 - - 108,495 Trade payables Up to 17 years 102,441 237,673 244,851 1,005,781 1,590,746 Total 16,008,689 29,049,391 28,646,012 74,106,237 147,810,330 The power plant construction projects include commitments made by the renewal energy subsidiaries for construction.

(35) NON-CASH TRANSACTION (Tabl

(35) NON-CASH TRANSACTION (Tables)	12 Months Ended
	Dec. 31, 2017
Non-cash Transaction Tables
Schedule of non cash transactions	Dec 31, 2017 Dec 31, 2016 Dec 31, 2015 Transactions resulting from business combinations Borrowings and debentures - (1,156,621) - Concession financial asset (12,338) 876,281 - Intangible assets (22,165) 1,870,268 - Property, plant and equipment (4,800) - - Other net assets acquired - 1,911 - (39,303) 1,591,839 - Cash and cash equivalents acquired in the business combination - (95,164) - Consideration paid in the acquisition, net (39,303) 1,496,675 - Other transactions Capital increase through earnings reserve - 392,272 554,888 Escrow deposits to property, plant and equipment 4 3,418 - Interest capitalized in property, plant and equipment 29,817 54,733 34,212 Interest capitalized in concession financial asset - distribution infrastructure 20,726 13,349 11,358 Reversal of contingencies against intangible assets - 7,591 - Repayment of intercompany loans with noncontrolling shareholders' dividends 259 - - Provision for socio environmental costscapitalized in property, plant and equipment 41,213 - - Transfers between property, plant and equipment and other assets 32,600 14,592 2,928

(36) RELEVANT FACT AND EVENTS76

(36) RELEVANT FACT AND EVENTS AFTER THE REPORTING PERIOD (Tables)	12 Months Ended
	Dec. 31, 2017
Relevant Fact And Events After Reporting Period Tables
Schedule of debentures issued	Subsidiary Issue Quantity issued R$ thousand Maturity Interest Utilization CPFL Paulista 9th issue – single series 1,380,000 1,380,000 January 2021 Semiannual Working capital improvement CPFL Piratininga 9th issue – single series 215,000 215,000 January 2021 Semiannual Working capital improvement RGE 9th issue – single series 220,000 220,000 January 2021 Semiannual Working capital improvement CPFL Santa Cruz 2nd issue – single series 190,000 190,000 January 2021 Semiannual Working capital improvement CPFL Geração 10th issue – single series 190,000 190,000 December 2018 Semiannual Working capital improvement CPFL Brasil 4th issue – single series 115,000 115,000 January 2019 Semiannual Working capital improvement RGE Sul 6th issue – single series 520,000 (*) 300,000 December 2020 Semiannual Working capital improvement 2,610,000

(37) CONDENSED UNCONSOLIDATED77

(37) CONDENSED UNCONSOLIDATED FINANCIAL INFORMATION (Tables)	12 Months Ended
	Dec. 31, 2017
Condensed Unconsolidated Financial Information Tables
Schedule of condensed unconsolidated financial information	ASSETS December 31, 2017 December 31, 2016 Cash and cash equivalents 6,581 64,973 Dividends and interest on capital 204,807 642,978 Other receivables 63,993 83,065 Total current assets 275,382 791,016 Deferred tax assets 145,779 171,073 Investments 8,557,673 7,866,100 Other receivables 484,814 80,775 Total noncurrent assets 9,188,266 8,117,948 Total assets 9,463,648 8,908,964 LIABILITIES December 31, 2017 December 31, 2016 Debentures 1,938 15,334 Dividends and interest on capital 281,919 218,630 Other payables 19,955 21,791 Total current liabilities 303,812 255,755 Debentures 184,388 612,251 Provision for tax, civil and labor risks 600 1,008 Allowance for equity investment losses - 19,302 Other payables 13,320 50,628 Total noncurrent liabilities 198,308 683,185 Equity 8,961,528 7,970,021 Total liabilities and equity 9,463,648 8,908,964 2017 2016 2015 Net operating revenue 1 1,713 1,157 General and administrative expenses (42,771) (50,860) (29,911) Income from electric energy service (42,770) (49,147) (28,754) Equity interests in subsidiaries, associates and joint ventures 1,349,766 922,362 926,951 Finance income (expenses) (56,471) 17,183 (22,948) Profit before taxes 1,250,525 890,398 875,250 Social contribution and income tax (70,775) 10,487 (10,309) Profit for the year 1,179,750 900,885 864,940 2017 2016 2015 Profit for the year 1,179,750 900,885 864,940 Items that will not be reclassified subsequently to profit and loss Equity in comprehensive income of subsidiaries 96,000 (394,175) 65,547 Total comprehensive income for the year 1,275,750 506,709 930,488 2017 2016 2015 OPERATING CASH FLOW Profit before taxes 1,250,525 890,398 875,250 ADJUSTMENT TO RECONCILE PROFIT TO CASH FROM OPERATING ACTIVITIES Depreciation and amortization 217 193 170 Provision for tax, civil and labor risks 61 425 1,497 Interest on debts, inflation adjustment and exchange rate changes 61,520 42,395 94,588 Equity interests in subsidiaries, associates and joint ventures (1,349,766) (922,362) (926,951) (37,443) 11,049 44,553 DECREASE (INCREASE) IN OPERATING ASSETS AND LIABILITIES Dividends and interest on capital received 1,172,336 1,606,073 627,014 Taxes recoverable 65,182 3,261 (12,350) Other operating assets and liabilities (19,043) 8,459 (2,526) CASH FLOWS PROVIDED BY OPERATIONS 1,181,032 1,628,842 656,691 Interest paid on debts and debentures (71,844) (45,470) (36,858) Income tax and social contribution paid (47,438) (27,117) (2,172) NET CASH FROM OPERATING ACTIVITIES 1,061,750 1,556,255 617,661 INVESTING ACTIVITIES Capital increase in investees (9,400) - (490,010) Advance for future capital increases (383,340) (1,384,520) (52,680) Other investing activities (72,435) (42,178) 10,298 NET CASH USED IN INVESTING ACTIVITIES (465,175) (1,426,698) (532,392) FINANCING ACTIVITIES Borrowings and debentures raised - 609,060 829,997 Repayment of principal of borrowings and debentures (434,000) (888,408) (1,290,000) Repayment of derivatives - (4,711) - Dividends and interest on capital paid (220,966) (204,717) (850) NET CASH GENERATED BY (USED IN) FINANCING ACTIVITIES (654,966) (488,776) (460,853) NET INCREASE IN CASH AND CASH EQUIVALENTS (58,390) (359,219) (375,584) CASH AND CASH EQUIVALENTS AT THE BEGINNING OF THE YEAR 64,973 424,192 799,775 CASH AND CASH EQUIVALENTS AT THE END OF THE YEAR 6,581 64,973 424,192
Schedule of cash and cash equivalents	December 31, 2017 December 31, 2016 Bank balances 508 426 Investment funds 6,073 64,548 Total 6,581 64,973
Schedule of dividends and interest on equity	Dividend Interest on own capital Total Subsidiary December 31, 2017 December 31, 2016 December 31, 2017 December 31, 2016 December 31, 2017 December 31, 2016 CPFL Paulista 49,798 - 49,798 - CPFL Piratininga - 72,080 - - - 72,080 CPFL Sul Paulista (*) - 8,641 - 1,986 - 10,627 Companhia Jaguari de Energia (CPFL Santa Cruz) 24,918 6,115 13,960 - 38,878 6,115 RGE 50,319 24,672 - - 50,319 24,672 CPFL Geração - 396,086 - - - 396,086 CPFL Centrais Geradoras 17 - - 17 - CPFL Jaguari Geração - 1,664 - - - 1,664 CPFL Brasil 20,748 86,020 2,361 1,650 23,109 87,671 CPFL Planalto 888 - - - 888 - CPFL Atende 1,003 1,953 620 554 1,623 2,507 Nect 4,348 5,600 - - 4,348 5,600 CPFL Eficiência Energética 12,195 9,565 17,404 16,325 29,599 25,891 AUTHI 6,228 10,064 - - 6,228 10,064 170,461 622,459 34,344 20,516 204,807 642,978
Schedule of other receivables	Current Noncurrent Dec 31, 2017 Dec 31, 2016 Dec 31, 2017 Dec 31, 2016 Advances - Fundação CESP 7,851 7,533 6,797 - Advances to suppliers 31,981 15,787 - - Pledges, funds and restricted deposits 159,291 106,925 621,489 533,719 Orders in progress 167,197 203,344 5,062 - Services rendered to third parties 8,530 9,385 - - Energy pre-purchase agreements - - 26,260 27,302 Collection agreements 661 1,273 - - Prepaid expenses 80,599 65,668 20,042 20,942 GSF Insurance Premium 19,629 12,722 17,359 28,935 Receivables - CDE 242,906 213,552 - - Advances to employees 19,658 15,940 - - Arrendamentos 15,684 19,281 45,290 50,541 Others 175,889 153,764 97,893 104,815 (-) Allowance for doubtful debts (note 6) (29,379) (27,992) - - Total 900,498 797,181 840,192 766,253
Schedule of deferred tax assets	December 31, 2017 December 31, 2016 Social contribution credit (debit) Tax losses carryforwards 38,216 42,841 Temporarily nondeductible differences (408) 1,125 Subtotal 37,808 43,966 Income tax credit (debit) Tax losses carryforwards 109,103 123,980 Temporarily nondeductible differences (1,132) 3,126 Subtotal 107,971 127,106 Total 145,779 171,073
Schedule of investments in subsidiaries	Number of shares (thousand) December 31, 2017 December 31, 2016 2017 2016 2015 Investment Equity interest Share of profit (loss) of investees CPFL Paulista 880,653 1,370,403 1,063,400 280,354 255,329 298,203 CPFL Piratininga 53,096,770 461,059 355,755 152,080 68,114 211,637 CPFL Santa Cruz - - 140,520 23,447 23,797 12,424 CPFL Leste Paulista - - 52,853 9,589 10,731 13,556 CPFL Sul Paulista - - 58,895 10,545 8,455 16,201 CPFL Jaguari 359,058 340,463 30,255 11,720 7,988 4,852 CPFL Mococa - - 33,824 6,999 9,198 6,679 RGE 1,019,790 1,680,334 1,614,320 117,700 102,647 145,804 RGE Sul 527,266 1,228,317 - 57,305 - - CPFL Geração 205,492,020 2,354,115 2,158,384 594,026 401,148 240,520 CPFL Jaguari Geração (*) 40,108 50,970 45,099 15,709 6,655 6,670 CPFL Brasil 3,000 96,093 109,054 94,455 104,235 81,929 CPFL Planalto (*) 630 3,293 2,101 3,550 2,476 1,830 CPFL Serviços 1,577,706 105,105 97,968 (12,863) (8,175) (17,952) CPFL Atende (*) 13,991 19,338 17,150 7,128 5,833 7,776 Nect (*) 2,059 15,515 10,295 17,392 13,424 18,155 CPFL Total (*) 9,005 20,624 27,570 20,865 12,817 5,836 CPFL Jaguariúna (*) - - 1,256,161 (8,360) (35,498) (167) CPFL Telecom 86,420 2,018 (19,302) (14,021) (33,333) (60,718) CPFL Centrais Geradoras (*) 16,128 16,177 15,459 735 (958) 4,740 CPFL Eficiência Energética 48,164 55,252 61,543 (2,582) 5,926 35,194 Authi (*) 10 18,694 16,810 24,912 24,264 2,537 Subtotal - By subsidiary's equity 7,837,770 7,148,112 1,410,685 985,074 1,035,703 Amortization of fair value adjustments of assets - - (60,918) (62,713) (108,754) Total 7,837,770 7,148,112 1,349,766 922,362 926,950 Investment 7,804,429 5,811,894 Advances for future capital increases 33,340 1,355,520 Allowance for equity investment losses - (19,302) (*) number of quotas
Schedule of dividends received	2017 2016 2015 CPFL Paulista 2,228 948,624 425,400 CPFL Piratininga 112,638 267,647 - CPFL Santa Cruz 8,427 40,009 - CPFL Leste Paulista 4,449 9,242 - CPFL Jaguari - 1,291 806 CPFL Mococa - 7,991 - RGE 24,672 172,432 113,012 CPFL Geração 779,533 110,532 - CPFL Brasil 166,695 1,601 52,599 CPFL Jaguari Geração 11,061 4,288 998 CPFL Planalto 1,471 2,835 1,002 CPFL Serviços - - 7,683 CPFL Atende 5,666 3,382 7,899 CPFL Total 17,810 10,767 4,734 Nect 13,424 18,155 10,780 CPFL Centrais Geradoras - 4,740 1,720 CPFL Eficiência Energética - - 380 Authi 24,264 2,537 - TOTAL 1,172,336 1,606,073 627,014
Schedule of debentures	December 31, 2017 December 31, 2016 Current and noncurrent interest Noncurrent principal Total Current and noncurrent interest Noncurrent principal Total 5 th Single series 2,817 186,000 188,817 18,069 620,000 638,069

(1) OPERATIONS (Details)

(1) OPERATIONS (Details)	12 Months Ended
	Dec. 31, 2017Municipality
Companhia Paulista de Forca e Luz ("CPFL Paulista") [Member]
Statement Line Items [Line Items]
Company type	Publicly-held corporation
Equity interest	Direct 100%
Location (state)	Interior of São Paulo
Number of municipalities	234
Approximate number of consumers	4,389
Concession period	30 years
End of the concession	Nov. 1, 2027
Companhia Piratininga de Forca e Luz ("CPFL Piratininga") [Member]
Statement Line Items [Line Items]
Company type	Publicly-held corporation
Equity interest	Direct 100%
Location (state)	Interior of São Paulo
Number of municipalities	27
Approximate number of consumers	1,720
Concession period	30 years
End of the concession	Oct. 1, 2028
Rio Grande Energia S.A. ("RGE") [Member]
Statement Line Items [Line Items]
Company type	Publicly-held corporation
Equity interest	Direct 100%
Location (state)	Interior of Rio Grande do Sul
Number of municipalities	255
Approximate number of consumers	1,485
Concession period	30 years
End of the concession	Nov. 1, 2027
RGE Sul Distribuidora de Energia S.A. ("RGE Sul") [Member]
Statement Line Items [Line Items]
Company type	Publicly-held corporation
Equity interest	Indirect100%
Location (state)	Interior of Rio Grande do Sul
Number of municipalities	118
Approximate number of consumers	1,336
Concession period	30 years
End of the concession	Nov. 1, 2027
Companhia Jaguari de Energia ( "CPFL Santa Cruz") [Member]
Statement Line Items [Line Items]
Company type	Privately-held corporation
Equity interest	Direct 100%
Location (state)	Interior of São Paulo, Paraná and Minas Gerais
Number of municipalities	45
Approximate number of consumers	447
Concession period	30 years
End of the concession	Jul. 1, 2045

(1) OPERATIONS (Details 1)

(1) OPERATIONS (Details 1)	12 Months Ended
	Dec. 31, 2017GWshares
CPFL Geracao de Energia S.A. ("CPFL Geracao") [Member]
Statement Line Items [Line Items]
Company type	Publicly-held corporation
Equity interest	Direct 100%
Location (state)	São Paulo and Goiás
Number of plants / type of energy	3 Hydropower plants (a)
Total installed power (MW) | GW	1,295
CPFL share installed power (MW) | shares	678
CERAN - Companhia Energetica Rio das Antas ("CERAN") [Member]
Statement Line Items [Line Items]
Company type	Privately-held corporation
Equity interest	Indirect 65%
Location (state)	Rio Grande do Sul
Number of plants / type of energy	3 Hydropower plants
Total installed power (MW) | GW	360
CPFL share installed power (MW) | shares	234
Foz do Chapeco Energia S.A. ("Foz do Chapeco") [Member]
Statement Line Items [Line Items]
Company type	Privately-held corporation
Joint Venture	Indirect 51% (d)
Location (state)	Santa Catarina and Rio Grande do Sul
Number of plants / type of energy	1 Hydropower plant
Total installed power (MW) | GW	855
CPFL share installed power (MW) | shares	436
Campos Novos Energia S.A. ("ENERCAN") [Member]
Statement Line Items [Line Items]
Company type	Privately-held corporation
Joint Venture	Indirect 48.72%
Location (state)	Santa Catarina
Number of plants / type of energy	1 Hydropower plant
Total installed power (MW) | GW	880
CPFL share installed power (MW) | shares	429
BAESA - Energetica Barra Grande S.A. [Member]
Statement Line Items [Line Items]
Company type	Privately-held corporation
Joint Venture	Indirect 25.01%
Location (state)	Santa Catarina and Rio Grande do Sul
Number of plants / type of energy	1 Hydropower plant
Total installed power (MW) | GW	690
CPFL share installed power (MW) | shares	173
Centrais Eletricas da Paraiba S.A. ("EPASA") [Member]
Statement Line Items [Line Items]
Company type	Privately-held corporation
Joint Venture	Indirect 53.34%
Location (state)	Paraíba
Number of plants / type of energy	2 Thermal plants
Total installed power (MW) | GW	342
CPFL share installed power (MW) | shares	182
Paulista Lajeado Energia S.A. ("Paulista Lajeado") [Member]
Statement Line Items [Line Items]
Company type	Privately-held corporation
Equity interest	Indirect 59.93% (b)
Location (state)	Tocantins
Number of plants / type of energy	1 Hydropower plant
Total installed power (MW) | GW	903
CPFL share installed power (MW) | shares	63
CPFL Energias Renovaveis S.A. ("CPFL Renovaveis") [Member]
Statement Line Items [Line Items]
Company type	Publicly-held corporation
Equity interest	Indirect 51.60%
Location (state)	(c)
Number of plants / type of energy	(c)
Total installed power (MW)	(c)
CPFL share installed power (MW)	(c)
CPFL Centrais Geradoras Ltda. ("CPFL Centrais Geradoras") [Member]
Statement Line Items [Line Items]
Company type	Limited liability company
Equity interest	Direct 100%
Location (state)	São Paulo and Minas Gerais
Number of plants / type of energy	6 small hydropower plants
Total installed power (MW) | GW	4
CPFL share installed power (MW) | shares	4

(1) OPERATIONS (Details 2)

(1) OPERATIONS (Details 2)	12 Months Ended
	Dec. 31, 2017
CPFL Comercializacao Brasil S.A. ("CPFL Brasil") [Member]
Statement Line Items [Line Items]
Company type	Privately-held corporation
Core activity	Energy commercialization
Equity interest	Direct 100%
Clion Assessoria e Comercializacao de Energia Eletrica Ltda. ("CPFL Meridional") [Member]
Statement Line Items [Line Items]
Company type	Limited liability company
Core activity	Commercialization and provision of energy services
Equity interest	Indirect 100%
CPFL Comercializacao Cone Sul S.A. ("CPFL Cone Sul") [Member]
Statement Line Items [Line Items]
Company type	Privately-held corporation
Core activity	Energy commercialization
Equity interest	Indirect 100%
CPFL Planalto Ltda. ("CPFL Planalto") [Member]
Statement Line Items [Line Items]
Company type	Limited liability company
Core activity	Energy commercialization
Equity interest	Direct 100%
CPFL Brasil Varejista S.A. ("CPFL Brasil Varejista") [Member]
Statement Line Items [Line Items]
Company type	Privately-held corporation
Core activity	Energy commercialization
Equity interest	Indirect 100%

(1) OPERATIONS (Details 3)

(1) OPERATIONS (Details 3)	12 Months Ended
	Dec. 31, 2017
CPFL Servicos, Equipamentos, Industria e Comercio S.A. ("CPFL Servicos") [Member]
Statement Line Items [Line Items]
Company type	Privately-held corporation
Core activity	Manufacturing, commercialization, rental and maintenance of electro-mechanical equipment and service provision
Equity interest	Direct 100%
NECT Servicos Administrativos Ltda ("Nect") [Member]
Statement Line Items [Line Items]
Company type	Limited liability company
Core activity	Provision of administrative services
Equity interest	Direct 100%
CPFL Atende Centro de Contatos e Atendimento Ltda. ("CPFL Atende") [Member]
Statement Line Items [Line Items]
Company type	Limited liability company
Core activity	Provision of call center services
Equity interest	Direct 100%
CPFL Total Servicos Administrativos Ltda. ("CPFL Total") [Member]
Statement Line Items [Line Items]
Company type	Limited liability company
Core activity	Collection services
Equity interest	Direct 100%
CPFL Eficiencia Energetica S.A ("CPFL ESCO") [Member]
Statement Line Items [Line Items]
Company type	Privately-held corporation
Core activity	Energy efficiency management
Equity interest	Direct 100%
TI Nect Servicos de Informatica Ltda. ("Authi") [Member]
Statement Line Items [Line Items]
Company type	Limited liability company
Core activity	Provision of IT services
Equity interest	Direct 100%
CPFL GD S.A ("CPFL GD") [Member]
Statement Line Items [Line Items]
Company type	Privately-held corporation
Core activity	Provision of maintenance services for energy generation companies
Equity interest	Indirect 100%

(1) OPERATIONS (Details 4)

(1) OPERATIONS (Details 4)	12 Months Ended
	Dec. 31, 2017
CPFL Jaguari de Geracao de Energia Ltda ("CPFL Jaguari Geracao") [Member]
Statement Line Items [Line Items]
Company type	Limited liability company
Core activity	Holding company
Equity interest	Direct 100%
Chapecoense Geracao S.A. ("Chapecoense") [Member]
Statement Line Items [Line Items]
Company type	Privately-held corporation
Core activity	Holding company
Equity interest	Indirect 51%
Sul Geradora Participacoes S.A. ("Sul Geradora") [Member]
Statement Line Items [Line Items]
Company type	Privately-held corporation
Core activity	Holding company
Equity interest	Indirect 99.95%
CPFL Telecom S.A ("CPFL Telecom") [Member]
Statement Line Items [Line Items]
Company type	Privately-held corporation
Core activity	Telecommunication services
Equity interest	Direct 100%
CPFL Transmissao Piracicaba S.A ("CPFL Transmissao Piracicaba") [Member]
Statement Line Items [Line Items]
Company type	Privately-held corporation
Core activity	Energy transmission services
Equity interest	Indirect 100%
CPFL Transmissora Morro Agudo S.A ("CPFL Transmissao Morro Agudo") [Member]
Statement Line Items [Line Items]
Company type	Privately-held corporation
Core activity	Energy transmission services
Equity interest	Indirect 100%

(5) CASH AND CASH EQUIVALENTS83

(5) CASH AND CASH EQUIVALENTS (Details) - BRL (R$) R$ in Thousands	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Cash And Cash Equivalents Details
Bank balances	R$ 365031	R$ 170884
Short-term financial investments	2,884,611	5,994,112
Overnight investment	178,444	95,034
Bank certificates of deposit	785,074	2,357,187
Repurchase agreements secured on debentures	3,268	58,616
Investment funds	1,917,826	3,483,274
Total	R$ 3249642	R$ 6164997	R$ 5682802	R$ 4357455

(6) CONSUMERS, CONCESSIONAIRE84

(6) CONSUMERS, CONCESSIONAIRES AND LICENSEES (Details) - BRL (R$) R$ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Current Assets [Member]
Statement Line Items [Line Items]
Current	R$ 4539476	R$ 3984991
Allowance for doubtful accounts	(238,193)	(219,098)
Total	4,301,283	3,765,893
Current Assets [Member] | Billed [Member]
Statement Line Items [Line Items]
Current	2,335,653	1,998,754
Current Assets [Member] | Unbilled [Member]
Statement Line Items [Line Items]
Current	1,008,486	1,095,188
Current Assets [Member] | Financing of consumers' debts [Member]
Statement Line Items [Line Items]
Current	229,840	170,982
Current Assets [Member] | CCEE transactions [Member]
Statement Line Items [Line Items]
Current	413,067	289,761
Current Assets [Member] | Concessionaires and licensees [Member]
Statement Line Items [Line Items]
Current	516,419	390,333
Current Assets [Member] | Others [Member]
Statement Line Items [Line Items]
Current	36,011	39,974
Current Assets [Member] | Residential [Member]
Statement Line Items [Line Items]
Current	1,113,604	932,380
Current Assets [Member] | Industrial [Member]
Statement Line Items [Line Items]
Current	483,630	386,826
Current Assets [Member] | Commercial [Member]
Statement Line Items [Line Items]
Current	382,470	317,111
Current Assets [Member] | Rural [Member]
Statement Line Items [Line Items]
Current	98,663	97,444
Current Assets [Member] | Public administration [Member]
Statement Line Items [Line Items]
Current	88,910	94,348
Current Assets [Member] | Public lighting [Member]
Statement Line Items [Line Items]
Current	67,533	73,142
Current Assets [Member] | Public utilities [Member]
Statement Line Items [Line Items]
Current	100,843	97,503
NonCurrent Assets [Member]
Statement Line Items [Line Items]
Noncurrent	265,221	245,612
Allowance for doubtful accounts	(28,683)	(42,427)
Total	236,539	203,185
NonCurrent Assets [Member] | Financing of consumers' debts [Member]
Statement Line Items [Line Items]
Noncurrent	217,944	198,875
NonCurrent Assets [Member] | CCEE transactions [Member]
Statement Line Items [Line Items]
Noncurrent	41,301	41,301
NonCurrent Assets [Member] | Free Energy [Member]
Statement Line Items [Line Items]
Noncurrent	5,976	R$ 5436
Current [Member] | Current Assets [Member]
Statement Line Items [Line Items]
Current	3,372,325
Current [Member] | Current Assets [Member] | Billed [Member]
Statement Line Items [Line Items]
Current	1,468,483
Current [Member] | Current Assets [Member] | Unbilled [Member]
Statement Line Items [Line Items]
Current	1,008,486
Current [Member] | Current Assets [Member] | Financing of consumers' debts [Member]
Statement Line Items [Line Items]
Current	169,171
Current [Member] | Current Assets [Member] | CCEE transactions [Member]
Statement Line Items [Line Items]
Current	182,128
Current [Member] | Current Assets [Member] | Concessionaires and licensees [Member]
Statement Line Items [Line Items]
Current	508,046
Current [Member] | Current Assets [Member] | Others [Member]
Statement Line Items [Line Items]
Current	36,011
Current [Member] | Current Assets [Member] | Residential [Member]
Statement Line Items [Line Items]
Current	602,525
Current [Member] | Current Assets [Member] | Industrial [Member]
Statement Line Items [Line Items]
Current	322,250
Current [Member] | Current Assets [Member] | Commercial [Member]
Statement Line Items [Line Items]
Current	254,605
Current [Member] | Current Assets [Member] | Rural [Member]
Statement Line Items [Line Items]
Current	74,136
Current [Member] | Current Assets [Member] | Public administration [Member]
Statement Line Items [Line Items]
Current	69,333
Current [Member] | Current Assets [Member] | Public lighting [Member]
Statement Line Items [Line Items]
Current	58,475
Current [Member] | Current Assets [Member] | Public utilities [Member]
Statement Line Items [Line Items]
Current	87,159
Current [Member] | NonCurrent Assets [Member]
Statement Line Items [Line Items]
Noncurrent	265,221
Current [Member] | NonCurrent Assets [Member] | Financing of consumers' debts [Member]
Statement Line Items [Line Items]
Noncurrent	217,944
Current [Member] | NonCurrent Assets [Member] | CCEE transactions [Member]
Statement Line Items [Line Items]
Noncurrent	41,301
Current [Member] | NonCurrent Assets [Member] | Free Energy [Member]
Statement Line Items [Line Items]
Noncurrent	5,976
Past due until 90 days [Member] | Current Assets [Member]
Statement Line Items [Line Items]
Current	921,397
Past due until 90 days [Member] | Current Assets [Member] | Billed [Member]
Statement Line Items [Line Items]
Current	670,303
Past due until 90 days [Member] | Current Assets [Member] | Unbilled [Member]
Statement Line Items [Line Items]
Current	0
Past due until 90 days [Member] | Current Assets [Member] | Financing of consumers' debts [Member]
Statement Line Items [Line Items]
Current	20,784
Past due until 90 days [Member] | Current Assets [Member] | CCEE transactions [Member]
Statement Line Items [Line Items]
Current	229,887
Past due until 90 days [Member] | Current Assets [Member] | Concessionaires and licensees [Member]
Statement Line Items [Line Items]
Current	423
Past due until 90 days [Member] | Current Assets [Member] | Others [Member]
Statement Line Items [Line Items]
Current	0
Past due until 90 days [Member] | Current Assets [Member] | Residential [Member]
Statement Line Items [Line Items]
Current	457,273
Past due until 90 days [Member] | Current Assets [Member] | Industrial [Member]
Statement Line Items [Line Items]
Current	77,148
Past due until 90 days [Member] | Current Assets [Member] | Commercial [Member]
Statement Line Items [Line Items]
Current	86,290
Past due until 90 days [Member] | Current Assets [Member] | Rural [Member]
Statement Line Items [Line Items]
Current	18,409
Past due until 90 days [Member] | Current Assets [Member] | Public administration [Member]
Statement Line Items [Line Items]
Current	15,638
Past due until 90 days [Member] | Current Assets [Member] | Public lighting [Member]
Statement Line Items [Line Items]
Current	6,573
Past due until 90 days [Member] | Current Assets [Member] | Public utilities [Member]
Statement Line Items [Line Items]
Current	8,972
Past due until 90 days [Member] | NonCurrent Assets [Member]
Statement Line Items [Line Items]
Noncurrent	0
Past due until 90 days [Member] | NonCurrent Assets [Member] | Financing of consumers' debts [Member]
Statement Line Items [Line Items]
Noncurrent	0
Past due until 90 days [Member] | NonCurrent Assets [Member] | CCEE transactions [Member]
Statement Line Items [Line Items]
Noncurrent	0
Past due until 90 days [Member] | NonCurrent Assets [Member] | Free Energy [Member]
Statement Line Items [Line Items]
Noncurrent	0
Past due until > 90 days [Member] | Current Assets [Member]
Statement Line Items [Line Items]
Current	245,752
Past due until > 90 days [Member] | Current Assets [Member] | Billed [Member]
Statement Line Items [Line Items]
Current	196,865
Past due until > 90 days [Member] | Current Assets [Member] | Unbilled [Member]
Statement Line Items [Line Items]
Current	0
Past due until > 90 days [Member] | Current Assets [Member] | Financing of consumers' debts [Member]
Statement Line Items [Line Items]
Current	39,885
Past due until > 90 days [Member] | Current Assets [Member] | CCEE transactions [Member]
Statement Line Items [Line Items]
Current	1,052
Past due until > 90 days [Member] | Current Assets [Member] | Concessionaires and licensees [Member]
Statement Line Items [Line Items]
Current	7,950
Past due until > 90 days [Member] | Current Assets [Member] | Others [Member]
Statement Line Items [Line Items]
Current	0
Past due until > 90 days [Member] | Current Assets [Member] | Residential [Member]
Statement Line Items [Line Items]
Current	53,805
Past due until > 90 days [Member] | Current Assets [Member] | Industrial [Member]
Statement Line Items [Line Items]
Current	84,232
Past due until > 90 days [Member] | Current Assets [Member] | Commercial [Member]
Statement Line Items [Line Items]
Current	41,574
Past due until > 90 days [Member] | Current Assets [Member] | Rural [Member]
Statement Line Items [Line Items]
Current	6,117
Past due until > 90 days [Member] | Current Assets [Member] | Public administration [Member]
Statement Line Items [Line Items]
Current	3,939
Past due until > 90 days [Member] | Current Assets [Member] | Public lighting [Member]
Statement Line Items [Line Items]
Current	2,485
Past due until > 90 days [Member] | Current Assets [Member] | Public utilities [Member]
Statement Line Items [Line Items]
Current	4,713
Past due until > 90 days [Member] | NonCurrent Assets [Member]
Statement Line Items [Line Items]
Noncurrent	0
Past due until > 90 days [Member] | NonCurrent Assets [Member] | Financing of consumers' debts [Member]
Statement Line Items [Line Items]
Noncurrent	0
Past due until > 90 days [Member] | NonCurrent Assets [Member] | CCEE transactions [Member]
Statement Line Items [Line Items]
Noncurrent	0
Past due until > 90 days [Member] | NonCurrent Assets [Member] | Free Energy [Member]
Statement Line Items [Line Items]
Noncurrent	R$ 0

(6) CONSUMERS, CONCESSIONAIRE85

(6) CONSUMERS, CONCESSIONAIRES AND LICENSEES (Details Narrative) - BRL (R$) R$ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Consumers Concessionaires And Licensees Details Narrative
Consumers, concessionaires and licensees, balance at beginning	R$ 261525	R$ 159194	R$ 123171
Consumers, concessionaires and licensees, business combination		(70,636)
Consumers, concessionaires and licensees, allowance - reversal (recognition)	(263,668)	(258,377)	(170,131)
Consumers, concessionaires and licensees, recovery of revenue	110,008	82,393	44,338
Consumers, concessionaires and licensees, write-off of accrued receivables	148,309	144,289	89,770
Consumers, concessionaires and licensees, balance at end	(266,876)	(261,525)	(159,194)
Consumers, concessionaires and licensees, balance at end, current	(238,193)
Consumers, concessionaires and licensees, balance at end, noncurrent		(28,683)
Other receivables, balance at beginning	(27,992)	(14,441)	(15,285)
Other receivables, business combination		(16,187)
Other receivables, allowance - reversal (recognition)	(1,439)	(969)	(1,152)
Other receivables, recovery of revenue	0	605	67
Other receivables, write-off of accrued receivables	52	3,000	1,930
Other receivables, balance at end	(29,379)	(27,992)	(14,441)
Other receivables, balance at end, current	(29,379)
Other receivables, balance at end, noncurent		0
Balance at beginning	(289,517)	(173,634)	(138,456)
Business combination		(86,823)
Allowance - reversal (recognition)	(265,107)	(259,347)	(171,283)
Recovery of revenue	110,008	82,998	44,405
Write-off of accrued receivables	148,361	147,289	91,700
Balance at end	(296,255)	(289,517)	R$ 173634
Balance at end, current	R$ 267572
Balance at end, noncurrent		R$ 28683

(7) TAXES RECOVERABLE (Details)

(7) TAXES RECOVERABLE (Details) - BRL (R$) R$ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Current [Member]
Statement Line Items [Line Items]
Total, current	R$ 395046	R$ 403848
Current [Member] | Prepayments of social contribution - CSLL [Member]
Statement Line Items [Line Items]
Total, current	7,257	14,141
Current [Member] | Prepayments of income tax - IRPJ [Member]
Statement Line Items [Line Items]
Total, current	21,887	35,534
Current [Member] | Income tax and social contribution to be offset [Member]
Statement Line Items [Line Items]
Total, current	59,658	94,268
Current [Member] | Income tax and social contribution recoverable
Statement Line Items [Line Items]
Total, current	88,802	143,943
Current [Member] | Withholding income tax - IRRF on interest on capital [Member]
Statement Line Items [Line Items]
Total, current	43,841	3,642
Current [Member] | Withholding income tax - IRRF [Member]
Statement Line Items [Line Items]
Total, current	103,277	115,189
Current [Member] | State VAT - ICMS to be offset [Member]
Statement Line Items [Line Items]
Total, current	104,843	82,090
Current [Member] | Social Integration Program - PIS [Member]
Statement Line Items [Line Items]
Total, current	8,447	9,062
Current [Member] | Contribution for Social Security Funding - COFINS [Member]
Statement Line Items [Line Items]
Total, current	37,699	39,984
Current [Member] | National Social Security Institute - INSS [Member]
Statement Line Items [Line Items]
Total, current	7,597	6,374
Current [Member] | Others Current [Member]
Statement Line Items [Line Items]
Total, current	541	3,564
Current [Member] | Other Taxes Recoverable [Member]
Statement Line Items [Line Items]
Total, current	306,244	259,905
Noncurrent [Member]
Statement Line Items [Line Items]
Total, noncurrent	233,444	198,286
Noncurrent [Member] | Income tax and social contribution recoverable
Statement Line Items [Line Items]
Total, noncurrent	61,464	65,535
Noncurrent [Member] | State VAT - ICMS to be offset [Member]
Statement Line Items [Line Items]
Total, noncurrent	159,624	122,415
Noncurrent [Member] | Social Integration Program - PIS [Member]
Statement Line Items [Line Items]
Total, noncurrent	1,024	800
Noncurrent [Member] | Contribution for Social Security Funding - COFINS [Member]
Statement Line Items [Line Items]
Total, noncurrent	4,719	3,687
Noncurrent [Member] | Other Taxes Recoverable [Member]
Statement Line Items [Line Items]
Total, noncurrent	171,980	132,751
Noncurrent [Member] | Social contribution to be offset - CSLL [Member]
Statement Line Items [Line Items]
Total, noncurrent	58,856	55,498
Noncurrent [Member] | Income tax to be offset - IRPJ [Member]
Statement Line Items [Line Items]
Total, noncurrent	2,608	10,037
Noncurrent [Member] | Others Noncurrent [Member]
Statement Line Items [Line Items]
Total, noncurrent	R$ 6613	R$ 5849

(8) SECTOR FINANCIAL ASSETS A87

(8) SECTOR FINANCIAL ASSETS AND LIABILITIES (Details) - BRL (R$) R$ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Statement Line Items [Line Items]
Deferred	R$ 731447	R$ 945530	R$ 1398646
Approved	(214,104)	30,612	555,318
Total	517,341	(914,918)	1,953,964
Operating revenue Constitution	1,115,051	(840,241)
Operating revenue Realization	785,786	(1,254,453)
Finance income/cost Monetary adjustment	(82,333)
Finance income/cost Monetary adjustment		7,668
Receipt Tariff flag	(386,242)	(687,673)
Business Combination		(94,181)
Current assets	210,834	0	1,464,019
Noncurrent assets	355,003	0	489,945
Current liabilities	(40,111)	(597,515)	0
Noncurrent liabilities	(8,385)	(317,406)	0
Deferred tariff costs and gains variations ("Parcela A") [Member]
Statement Line Items [Line Items]
Deferred	924,943	(762,573)
Approved	(235,916)	190,369
Total	689,026	(572,203)
Operating revenue Constitution	1,187,928	(644,484)
Operating revenue Realization	536,269	(1,260,579)
Finance income/cost Monetary adjustment	(76,726)	28,166
Receipt Tariff flag	(386,242)	(687,673)
Business Combination		(18,213)
Energy development account - CDE [Member]
Statement Line Items [Line Items]
Deferred	(235,901)	(342,161)	407,295
Approved	(263,520)	(70,301)	109,937
Total	(499,422)	(412,462)	517,232
Operating revenue Constitution	(405,409)	(612,336)
Operating revenue Realization	356,715	(329,898)
Finance income/cost Monetary adjustment	(38,267)	(4,020)
Receipt Tariff flag	0	0
Business Combination		16,561
Electric energy cost [Member]
Statement Line Items [Line Items]
Deferred	1,625,759	(506,490)	(466,337)
Approved	(18,280)	(239,777)	472,428
Total	1,607,479	(746,267)	6,091
Operating revenue Constitution	2,018,754	81,164
Operating revenue Realization	751,840	(179,617)
Finance income/cost Monetary adjustment	(31,144)	(101,982)
Receipt Tariff flag	(385,704)	(417,883)
Business Combination		(134,041)
System Service Charge (ESS) and Reserve Energy Charge (EER) [Member]
Statement Line Items [Line Items]
Deferred	(974,091)	(406,568)	(25,128)
Approved	(167,048)	(124,411)	(249,081)
Total	(1,141,139)	(530,979)	(274,209)
Operating revenue Constitution	(1,003,482)	(225,794)
Operating revenue Realization	450,638	385,941
Finance income/cost Monetary adjustment	(57,165)	(56,038)
Receipt Tariff flag	(151)	(269,352)
Business Combination		(91,527)
Proinfa [Member]
Statement Line Items [Line Items]
Deferred	(610)	3,492	(814)
Approved	(17,961)	31,414	(5,334)
Total	(18,572)	34,906	(6,148)
Operating revenue Constitution	(28,048)	51,060
Operating revenue Realization	(18,829)	(19,335)
Finance income/cost Monetary adjustment	(6,600)	7,219
Receipt Tariff flag	0	0
Business Combination		2,111
Basic network charges [Member]
Statement Line Items [Line Items]
Deferred	(20,163)	27,527	28,185
Approved	23,387	9,660	68,289
Total	3,224	37,187	96,474
Operating revenue Constitution	1,448	19,517
Operating revenue Realization	(35,035)	(84,894)
Finance income/cost Monetary adjustment	(376)	(1,449)
Receipt Tariff flag	0	0
Business Combination		7,539
Pass through from Itaipu [Member]
Statement Line Items [Line Items]
Deferred	959,518	147,012	1,281,279
Approved	125,860	442,911	39,416
Total	1,085,378	589,923	1,320,695
Operating revenue Constitution	1,022,892	(116,276)
Operating revenue Realization	(570,453)	(921,201)
Finance income/cost Monetary adjustment	43,016	197,581
Receipt Tariff flag	0	0
Business Combination		109,124
Transmission from Itaipu [Member]
Statement Line Items [Line Items]
Deferred	7,802	7,646	11,372
Approved	7,806	7,281	4,097
Total	15,608	14,927	15,469
Operating revenue Constitution	13,992	8,102
Operating revenue Realization	(13,705)	(13,754)
Finance income/cost Monetary adjustment	394	2,163
Receipt Tariff flag	0	0
Business Combination		2,948
Neutrality of industry charges [Member]
Statement Line Items [Line Items]
Deferred	32,566	142,091	187,765
Approved	112,084	164,375	2,508
Total	144,651	306,466	190,273
Operating revenue Constitution	89,103	198,274
Operating revenue Realization	(258,685)	(171,420)
Finance income/cost Monetary adjustment	7,767	15,730
Receipt Tariff flag	0	0
Business Combination		73,609
Overcontracting [Member]
Statement Line Items [Line Items]
Deferred	(469,937)	164,878	67,127
Approved	(38,244)	(30,782)	77,578
Total	(508,181)	134,096	144,705
Operating revenue Constitution	(521,321)	(48,195)
Operating revenue Realization	(126,217)	73,600
Finance income/cost Monetary adjustment	5,648	(31,037)
Receipt Tariff flag	(387)	(439)
Business Combination		(4,537)
Other financial components [Member]
Statement Line Items [Line Items]
Deferred	(193,496)	(182,958)	(92,098)
Approved	21,812	(159,759)	35,480
Total	(171,685)	(342,717)	(56,618)
Operating revenue Constitution	(72,877)	(195,758)
Operating revenue Realization	249,516	6,126
Finance income/cost Monetary adjustment	(5,607)	(20,498)
Receipt Tariff flag	0	0
Business Combination		(75,968)
Related to judicial injuctions [Member]
Statement Line Items [Line Items]
Deferred	0	(76,615)	0
Approved	(27,968)	(132,410)	0
Total	(27,968)	(209,025)	0
Operating revenue Constitution	(10,038)	(223,356)
Operating revenue Realization	190,291	31,419
Finance income/cost Monetary adjustment	805	(17,088)
Receipt Tariff flag	0	0
Business Combination		0
Others financial components [Member]
Statement Line Items [Line Items]
Deferred	(193,496)	(106,343)	(92,098)
Approved	49,780	(27,349)	35,480
Total	(143,717)	(133,692)	R$ 56618
Operating revenue Constitution	(62,839)	27,598
Operating revenue Realization	59,226	(25,294)
Finance income/cost Monetary adjustment	(6,412)	(3,410)
Receipt Tariff flag	R$ 0	0
Business Combination		R$ 75968

(9) DEFERRED TAX ASSETS AND L88

(9) DEFERRED TAX ASSETS AND LIABILITIES (Details) - BRL (R$) R$ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Statement Line Items [Line Items]
Total tax credit	R$ 943199	R$ 922858
Total tax debit	(1,249,591)	(1,324,134)
Social contribution [Member]
Statement Line Items [Line Items]
Tax losses carryforwards	103,903	123,389
Tax benefit of merged goodwill	105,065	86,377
Temporarily nondeductible differences	(305,677)	(332,750)
Total	(96,708)	(122,984)
Income tax [Member]
Statement Line Items [Line Items]
Tax losses carryforwards	303,543	358,683
Tax benefit of merged goodwill	342,262	295,987
Temporarily nondeductible differences	(844,948)	(923,383)
Total	(199,141)	(268,713)
PIS and COFINS [Member]
Statement Line Items [Line Items]
Temporarily nondeductible differences	(10,543)	(9,580)
Total	R$ 306392	R$ 401276

(9) DEFERRED TAX ASSETS AND L89

(9) DEFERRED TAX ASSETS AND LIABILITIES (Details 1) - BRL (R$) R$ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Social contribution [Member]
Statement Line Items [Line Items]
Total	R$ 105065	R$ 86377
Social contribution [Member] | Companhia Paulista de Forca e Luz ("CPFL Paulista") [Member]
Statement Line Items [Line Items]
Total	45,872	50,497
Social contribution [Member] | Companhia Piratininga de Forca e Luz ("CPFL Piratininga") [Member]
Statement Line Items [Line Items]
Total	11,215	12,251
Social contribution [Member] | Rio Grande Energia S.A. ("RGE") [Member]
Statement Line Items [Line Items]
Total	21,513	23,629
Social contribution [Member] | RGE Sul Distribuidora de Energia S.A. ("RGE Sul") [Member]
Statement Line Items [Line Items]
Total	26,466	0
Social contribution [Member] | CPFL Geracao de Energia S.A. ("CPFL Geracao") [Member]
Statement Line Items [Line Items]
Total	0	0
Income tax [Member]
Statement Line Items [Line Items]
Total	342,262	295,987
Income tax [Member] | Companhia Paulista de Forca e Luz ("CPFL Paulista") [Member]
Statement Line Items [Line Items]
Total	127,421	140,270
Income tax [Member] | Companhia Piratininga de Forca e Luz ("CPFL Piratininga") [Member]
Statement Line Items [Line Items]
Total	38,491	42,044
Income tax [Member] | Rio Grande Energia S.A. ("RGE") [Member]
Statement Line Items [Line Items]
Total	88,843	97,584
Income tax [Member] | RGE Sul Distribuidora de Energia S.A. ("RGE Sul") [Member]
Statement Line Items [Line Items]
Total	73,515	0
Income tax [Member] | CPFL Geracao de Energia S.A. ("CPFL Geracao") [Member]
Statement Line Items [Line Items]
Total	R$ 13992	R$ 16090

(9) DEFERRED TAX ASSETS AND L90

(9) DEFERRED TAX ASSETS AND LIABILITIES (Details 2) - BRL (R$) R$ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Social contribution [Member]
Temporarily nondeductible differences
Provision for tax, civil and labor risks	R$ 53687	R$ 45065
Private pension fund	2,331	1,711
Allowance for doubtful accounts	27,354	26,543
Free energy supply	8,382	7,718
Research and development and energy efficiency programs	21,851	17,474
Personnel-related provisions	4,111	3,422
Depreciation rate difference	5,535	6,200
Derivatives	(48,848)	(54,368)
Recognition of concession - adjustment of intangible asset (IFRS/CPC)	(7,291)	(8,355)
Recognition of concession - adjustment of financial asset (IFRS/CPC)	(117,527)	(104,080)
Actuarial losses (IFRS/CPC)	25,716	25,390
Financial instruments (IFRS/CPC)	(5,291)	(10,022)
Accelerated depreciation	(104)	(73)
Others	(15,699)	4,491
Temporarily nondeductible differences
Property, plant and equipment - adjustment of deemed cost (IFRS/CPC)	(51,961)	(55,223)
Actuarial losses (IFRS/CPC)	36,607	49,698
Deferred taxes - asset:
Provision for tax, civil and labor risks	13,188	0
Fair value of property, plant and equipment (negative value added of assets)	21,294	22,771
Deferred taxes - liability:
Fair value of property, plant and equipment (value added of assets)	(25,811)	(27,472)
Value added derived from determination of deemed cost	(62,354)	(78,443)
Intangible asset - exploration right/authorization in indirect subsidiaries acquired	(184,703)	(183,443)
Other temporary differences	(6,145)	(21,754)
Total	(305,677)	(332,750)
Income tax [Member]
Temporarily nondeductible differences
Provision for tax, civil and labor risks	149,130	125,182
Private pension fund	6,476	4,753
Allowance for doubtful accounts	75,985	73,729
Free energy supply	23,284	21,440
Research and development and energy efficiency programs	60,697	48,538
Personnel-related provisions	11,420	9,506
Depreciation rate difference	15,374	17,223
Derivatives	(135,690)	(151,023)
Recognition of concession - adjustment of intangible asset (IFRS/CPC)	(20,253)	(23,208)
Recognition of concession - adjustment of financial asset (IFRS/CPC)	(324,387)	(287,990)
Actuarial losses (IFRS/CPC)	71,432	70,527
Financial instruments (IFRS/CPC)	(14,694)	(27,838)
Accelerated depreciation	(288)	(204)
Others	(41,527)	12,281
Temporarily nondeductible differences
Property, plant and equipment - adjustment of deemed cost (IFRS/CPC)	(144,336)	(153,398)
Actuarial losses (IFRS/CPC)	101,687	138,051
Deferred taxes - asset:
Provision for tax, civil and labor risks	36,635	0
Fair value of property, plant and equipment (negative value added of assets)	59,150	63,252
Deferred taxes - liability:
Fair value of property, plant and equipment (value added of assets)	(71,699)	(76,310)
Value added derived from determination of deemed cost	(173,207)	(217,897)
Intangible asset - exploration right/authorization in indirect subsidiaries acquired	(513,064)	(509,563)
Other temporary differences	(17,071)	(60,435)
Total	(844,948)	(923,383)
PIS and COFINS [Member]
Temporarily nondeductible differences
Provision for tax, civil and labor risks	0	0
Private pension fund	0	0
Allowance for doubtful accounts	0	0
Free energy supply	0	0
Research and development and energy efficiency programs	0	0
Personnel-related provisions	0	0
Depreciation rate difference	0	0
Derivatives	0	0
Recognition of concession - adjustment of intangible asset (IFRS/CPC)	0	0
Recognition of concession - adjustment of financial asset (IFRS/CPC)	(7,881)	(6,157)
Actuarial losses (IFRS/CPC)	0	0
Financial instruments (IFRS/CPC)	0	0
Accelerated depreciation	0	0
Others	(2,662)	(3,423)
Temporarily nondeductible differences
Property, plant and equipment - adjustment of deemed cost (IFRS/CPC)	0	0
Actuarial losses (IFRS/CPC)	0	0
Deferred taxes - asset:
Provision for tax, civil and labor risks	0	0
Fair value of property, plant and equipment (negative value added of assets)	0	0
Deferred taxes - liability:
Fair value of property, plant and equipment (value added of assets)	0	0
Value added derived from determination of deemed cost	0	0
Intangible asset - exploration right/authorization in indirect subsidiaries acquired	0	0
Other temporary differences	0	0
Total	R$ 10543	R$ 9580

(9) DEFERRED TAX ASSETS AND L91

(9) DEFERRED TAX ASSETS AND LIABILITIES (Details 3) - BRL (R$) R$ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Social contribution [Member]
Statement Line Items [Line Items]
Profit before taxes	R$ 1846670	R$ 1380547	R$ 1454454
Reconciliation to reflect effective rate:
Equity interest in associates and joint ventures	(312,390)	(311,414)	(216,885)
Amortization of intangible asset acquired	48,649	48,649	84,484
Effect of presumed profit regime	(352,101)	(175,110)	(186,546)
Adjustment of revenue from excess demand and excess reactive power	134,778	119,272	117,374
Tax incentive - operating profit	0	0	0
Other permanent additions (exclusions), net	74,015	6,420	42,310
Tax base	R$ 1439621	R$ 1068364	R$ 1295193
Statutory rate	9.00%	9.00%	9.00%
Tax credit (debit)	R$ 129566	R$ 96153	R$ 116567
Recognized (unrecognized) tax credit, net	(39,162)	(54,706)	(43,595)
Total	(168,728)	(150,859)	(160,162)
Current	(153,543)	(244,015)	(10,916)
Deferred	(15,185)	93,156	(149,246)
Income tax [Member]
Statement Line Items [Line Items]
Profit before taxes	1,846,670	1,380,547	1,454,454
Reconciliation to reflect effective rate:
Equity interest in associates and joint ventures	(312,390)	(311,414)	(216,885)
Amortization of intangible asset acquired	62,756	62,756	108,797
Effect of presumed profit regime	(430,296)	(234,827)	(244,541)
Adjustment of revenue from excess demand and excess reactive power	134,778	119,272	117,374
Tax incentive - operating profit	(71,340)	(112,232)	(85,760)
Other permanent additions (exclusions), net	82,631	(24,063)	59,450
Tax base	R$ 1312809	R$ 880040	R$ 1192890
Statutory rate	25.00%	25.00%	25.00%
Tax credit (debit)	R$ 328202	R$ 220010	R$ 298223
Recognized (unrecognized) tax credit, net	(106,699)	(130,621)	(120,792)
Total	(434,901)	(350,631)	(419,015)
Current	(387,076)	(623,183)	(1,944)
Deferred	R$ 47825	R$ 272552	R$ 417071

(9) DEFERRED TAX ASSETS AND L92

(9) DEFERRED TAX ASSETS AND LIABILITIES (Details 4) - BRL (R$) R$ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Social contribution [Member]
Statement Line Items [Line Items]
Actuarial losses (gains)	R$ 166857	R$ 527436	R$ 84635
Limits on the asset ceiling	21,399	(8,738)	7,984
Basis of calculation	R$ 145458	R$ 518698	R$ 76651
Statutory rate	9.00%	9.00%	9.00%
Calculated taxes	R$ 13092	R$ 46683	R$ 6899
Limitation on recognition (reversal) of tax credits	0	13,720	(3,959)
Taxes recognized in other comprehensive income	13,092	(32,962)	2,940
Income tax [Member]
Statement Line Items [Line Items]
Actuarial losses (gains)	(166,857)	527,436	(84,635)
Limits on the asset ceiling	21,399	(8,738)	7,984
Basis of calculation	R$ 145458	R$ 518698	R$ 76651
Statutory rate	25.00%	25.00%	25.00%
Calculated taxes	R$ 36365	R$ 129675	R$ 19163
Limitation on recognition (reversal) of tax credits	0	38,112	(10,998)
Taxes recognized in other comprehensive income	R$ 36365	R$ 91562	R$ 8165

(9) DEFERRED TAX ASSETS AND L93

(9) DEFERRED TAX ASSETS AND LIABILITIES (Details Narrative) R$ in Thousands	Dec. 31, 2017BRL (R$)
CPFL Energias Renovaveis S.A. ("CPFL Renovaveis") [Member]
Statement Line Items [Line Items]
Tax credits on tax loss carryforwards	R$ 952402
RGE Sul Distribuidora de Energia S.A. ("RGE Sul") [Member]
Statement Line Items [Line Items]
Tax credits on tax loss carryforwards	248,705
Sul Geradora Participacoes S.A. ("Sul Geradora") [Member]
Statement Line Items [Line Items]
Tax credits on tax loss carryforwards	72,645
CPFL Telecom S.A ("CPFL Telecom") [Member]
Statement Line Items [Line Items]
Tax credits on tax loss carryforwards	33,321
CPFL Jaguari de Geracao de Energia Ltda ("CPFL Jaguari Geracao") [Member]
Statement Line Items [Line Items]
Tax credits on tax loss carryforwards	R$ 2486

(10) CONCESSION FINANCIAL ASS94

(10) CONCESSION FINANCIAL ASSET (Details) - BRL (R$) R$ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Statement Line Items [Line Items]
Balance at the beginning of the period			R$ 3374616
Noncurrent	R$ 5363144	R$ 3597474	2,834,522
Additions	1,018,515	706,036	367,531
Adjustment of expected cash flow	212,294	203,452	414,800
Adjustment - financial asset measured at amortized cost	27,807	16,088	11,400
Disposals	(35,039)	(25,392)	(20,788)
Transfers to intangible assets - extended concessions			(537,198)
Cash inputs - RAP	(15,677)	(9,727)	(3,257)
Business combination	(12,338)	876,281
Balance at the end of the period	6,569,404	5,373,844	3,607,104
Current	23,736	10,700	9,630
Noncurrent	6,545,668	5,363,144	3,597,474
Distribution [Member]
Statement Line Items [Line Items]
Balance at the beginning of the period	5,193,511	3,483,713	3,296,837
Current			540,094
Noncurrent	5,193,511	3,483,713	2,756,744
Additions	972,254	655,456	330,062
Adjustment of expected cash flow	212,294	203,452	414,800
Adjustment - financial asset measured at amortized cost	0	0	0
Disposals	(35,039)	(25,392)	(20,788)
Transfers to intangible assets - extended concessions			(537,198)
Cash inputs - RAP	0	0	0
Business combination	(12,338)	876,281
Balance at the end of the period	6,330,681	5,193,511	3,483,713
Current	0	0	0
Noncurrent	6,330,681	5,193,511	3,483,713
Transmission [Member]
Statement Line Items [Line Items]
Balance at the beginning of the period	180,333	123,391	77,779
Current			0
Noncurrent	169,633	113,761	77,779
Additions	46,261	50,580	37,469
Adjustment of expected cash flow	0	0	0
Adjustment - financial asset measured at amortized cost	27,807	16,088	11,400
Disposals	0	0	0
Transfers to intangible assets - extended concessions			0
Cash inputs - RAP	(15,677)	(9,727)	(3,257)
Business combination	0	0
Balance at the end of the period	238,723	180,333	123,391
Current	23,736	10,700	9,630
Noncurrent	R$ 214987	R$ 169633	R$ 113761

(10) CONCESSION FINANCIAL ASS95

(10) CONCESSION FINANCIAL ASSET (Details Narrative) - BRL (R$) R$ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Concession Financial Asset Details Narrative
Other Operating Income	R$ 27807	R$ 16088	R$ 11400

(11) OTHER ASSETS (Details)

(11) OTHER ASSETS (Details) - BRL (R$) R$ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Current [Member]
Statement Line Items [Line Items]
Advances - Fundacao CESP	R$ 7851	R$ 7533
Advances to suppliers	31,981	15,787
Pledges, funds and restricted deposits	159,291	106,925
Orders in progress	167,197	203,344
Services rendered to third parties	8,530	9,385
Energy pre-purchase agreements	0	0
Collection agreements	661	1,273
Prepaid expenses	80,599	65,668
GSF Insurance Premium	19,629	12,722
Receivables - CDE	242,906	213,552
Advances to employees	19,658	15,940
Indemnities for claims	15,684	19,281
Others	175,889	153,764
(-) Allowance for doubtful accounts (note 6)	(29,379)	(27,992)
Total	900,498	797,181
Noncurrent [Member]
Statement Line Items [Line Items]
Advances - Fundacao CESP	6,797	0
Advances to suppliers	0	0
Pledges, funds and restricted deposits	621,489	533,719
Orders in progress	5,062	0
Services rendered to third parties	0	0
Energy pre-purchase agreements	26,260	27,302
Collection agreements	0	0
Prepaid expenses	20,042	20,942
GSF Insurance Premium	17,359	28,935
Receivables - CDE	0	0
Advances to employees	0	0
Indemnities for claims	45,290	50,541
Others	97,893	104,815
(-) Allowance for doubtful accounts (note 6)	0	0
Total	R$ 840192	R$ 766253

(12) INVESTMENTS (Details)

(12) INVESTMENTS (Details) - BRL (R$) R$ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Investments Details
Permanent equity interests - By equity method	R$ 990910	R$ 1482533
Permanent equity interests - Fair value of assets, net	10,640	11,219
Total	R$ 1001550	R$ 1493753

(12) INVESTMENTS (Details 1)

(12) INVESTMENTS (Details 1) - BRL (R$) R$ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Statement Line Items [Line Items]
Share of equity	R$ 1001550	R$ 1493753
Share of equity	990,910	1,482,533
Share of profit (loss)	312,390	311,414	R$ 216885
At fair value [member]
Statement Line Items [Line Items]
Share of equity	10,640	11,219
Share of profit (loss)	(579)	(579)	(1,136)
BAESA - Energetica Barra Grande S.A. [Member]
Statement Line Items [Line Items]
Share of equity	187,654	175,914
Share of profit (loss)	11,849	9,853	2,508
Campos Novos Energia S.A. ("ENERCAN") [Member]
Statement Line Items [Line Items]
Share of equity	176,998	562,701
Share of profit (loss)	85,808	117,112	74,677
Chapecoense Geracao S.A. ("Chapecoense") [Member]
Statement Line Items [Line Items]
Share of equity	385,870	537,170
Share of profit (loss)	120,651	117,451	77,487
Centrais Eletricas da Paraiba S.A. ("EPASA") [Member]
Statement Line Items [Line Items]
Share of equity	240,388	206,749
Share of profit (loss)	R$ 94663	R$ 67577	R$ 63348

(12) INVESTMENTS (Details 2)

(12) INVESTMENTS (Details 2) - BRL (R$) R$ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Statement Line Items [Line Items]
Dividend	R$ 54026	R$ 70402
Interest on own capital	2,118	2,926
Total	56,145	73,328
Investco S.A [Member]
Statement Line Items [Line Items]
Dividend	0	0
Interest on own capital	2,118	2,926
Total	2,118	2,926
BAESA - Energetica Barra Grande S.A. [Member]
Statement Line Items [Line Items]
Dividend	108	89
Interest on own capital	0	0
Total	108	89
Campos Novos Energia S.A. ("ENERCAN") [Member]
Statement Line Items [Line Items]
Dividend	21,184	40,983
Interest on own capital	0	0
Total	21,184	40,983
Chapecoense Geracao S.A. ("Chapecoense") [Member]
Statement Line Items [Line Items]
Dividend	32,734	29,329
Interest on own capital	0	0
Total	R$ 32734	R$ 29329

(12) INVESTMENTS (Details 3)

(12) INVESTMENTS (Details 3) - BRL (R$) R$ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Campos Novos Energia S.A. ("ENERCAN") [Member]
Statement Line Items [Line Items]
Current assets	R$ 182843	R$ 405874
Cash and cash equivalents	48,695	288,956
Noncurrent assets	1,101,291	1,174,869
Current liabilities	291,010	196,760
Borrowings	140,090	87,560
Other financial liabilities	4,085	7,848
Noncurrent liabilities	629,850	229,085
Borrowings and debentures	510,874	153,020
Other financial liabilities	25,115	26,254
Equity	363,273	1,154,897
Net operating revenue	580,430	564,966	R$ 523055
Operational costs and expenses	(273,339)	(137,159)	(196,480)
Depreciation and amortization	(52,773)	(53,888)	(53,733)
Interest income	32,849	31,602	15,742
Interest expense	(31,135)	(36,275)	(56,049)
Income tax expense	(88,229)	(121,223)	(76,795)
Profit for the year	R$ 176113	R$ 240363	R$ 153269
Equity Interests and voting capital	48.72%	48.72%	48.72%
BAESA - Energetica Barra Grande S.A. [Member]
Statement Line Items [Line Items]
Current assets	R$ 124361	R$ 54703
Cash and cash equivalents	17,873	18,946
Noncurrent assets	1,030,904	1,117,120
Current liabilities	121,369	116,192
Borrowings	63,154	87,032
Other financial liabilities	17,113	24,119
Noncurrent liabilities	283,456	352,142
Borrowings and debentures	0	63,196
Other financial liabilities	265,250	276,600
Equity	750,440	703,489
Net operating revenue	412,329	239,730	R$ 427561
Operational costs and expenses	(265,955)	(76,985)	(260,004)
Depreciation and amortization	(50,621)	(51,429)	(55,342)
Interest income	4,906	9,115	8,426
Interest expense	(27,986)	(23,961)	(22,555)
Income tax expense	(25,442)	(20,401)	(5,165)
Profit for the year	R$ 47385	R$ 39405	R$ 10028
Equity Interests and voting capital	25.01%	25.01%	25.01%
Chapecoense Geracao S.A. ("Chapecoense") [Member]
Statement Line Items [Line Items]
Current assets	R$ 329721	R$ 577296
Cash and cash equivalents	116,425	280,083
Noncurrent assets	2,745,989	2,892,371
Current liabilities	426,695	391,402
Borrowings	138,788	137,753
Other financial liabilities	67,897	78,372
Noncurrent liabilities	1,892,407	2,024,989
Borrowings and debentures	1,172,181	1,292,239
Other financial liabilities	716,986	730,494
Equity	756,608	1,053,275
Net operating revenue	829,525	789,732	R$ 729511
Operational costs and expenses	(186,638)	(140,212)	(149,219)
Depreciation and amortization	(126,811)	(126,770)	(130,652)
Interest income	24,639	35,113	28,235
Interest expense	(183,237)	(125,192)	(132,625)
Income tax expense	(123,307)	(106,683)	(76,880)
Profit for the year	R$ 236570	R$ 212294	R$ 151935
Equity Interests and voting capital	51.00%	51.00%	51.00%
Centrais Eletricas da Paraiba S.A. ("EPASA") [Member]
Statement Line Items [Line Items]
Current assets	R$ 319222	R$ 257082
Cash and cash equivalents	74,741	85,709
Noncurrent assets	531,527	562,462
Current liabilities	157,343	172,401
Borrowings	34,299	35,555
Other financial liabilities	993	62,762
Noncurrent liabilities	242,765	259,559
Borrowings and debentures	186,373	218,891
Other financial liabilities	0	28,686
Equity	450,641	387,584
Net operating revenue	789,402	548,145	R$ 949246
Operational costs and expenses	(518,352)	(328,093)	(729,994)
Depreciation and amortization	(35,640)	(35,075)	(32,413)
Interest income	6,102	10,329	11,275
Interest expense	(26,197)	(23,128)	(29,778)
Income tax expense	(39,892)	(28,011)	(32,869)
Profit for the year	R$ 177458	R$ 126665	R$ 118734
Equity Interests and voting capital	53.34%	53.34%	53.34%

(12) INVESTMENTS (Details Narra

(12) INVESTMENTS (Details Narrative)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Centrais Eletricas da Paraiba S.A. ("EPASA") [Member]
Statement Line Items [Line Items]
Equity Interests and voting capital	53.34%	53.34%	53.34%
Chapecoense Geracao S.A. ("Chapecoense") [Member]
Statement Line Items [Line Items]
Equity Interests and voting capital	51.00%	51.00%	51.00%

(13) PROPERTY, PLANT AND EQU102

(13) PROPERTY, PLANT AND EQUIPMENT (Details) - BRL (R$) R$ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Statement Line Items [Line Items]
Beginning Balance	R$ 9712998	R$ 9173217	R$ 9149486
Additions	756,887	1,085,019	584,216
Disposals	(43,845)	(35,850)	(28,477)
Transfers	0	0	0
Reclassification - cost		8,536	0
Transfers from/to other assets - cost	(41,224)	(16,164)	471
Depreciation	(597,795)	(525,420)	(503,881)
Write-off of depreciation	11,540	5,484	4,480
Reclassification - depreciation		(8,536)	0
Transfers from/to other assets - depreciation	8,624	1,572	35
Impairment losses	(15,261)	(5,221)	(33,112)
Business combinations	(4,800)	30,364
End Balance	9,787,125	9,712,998	9,173,217
Gross carrying amount [Member]
Statement Line Items [Line Items]
Beginning Balance	13,364,592	12,308,285	11,786,852
Additions
Disposals
Transfers
Reclassification - cost
Transfers from/to other assets - cost
Depreciation
Write-off of depreciation
Reclassification - depreciation
Transfers from/to other assets - depreciation
Impairment losses
End Balance	14,015,662	13,364,592	12,308,285
Accumulated Depreciation [Member]
Statement Line Items [Line Items]
Beginning Balance	(3,651,594)	(3,135,068)	(2,637,366)
Additions
Disposals
Transfers
Reclassification - cost
Transfers from/to other assets - cost
Depreciation
Write-off of depreciation
Reclassification - depreciation
Transfers from/to other assets - depreciation
Impairment losses
End Balance	(4,228,537)	(3,651,594)	(3,135,068)
Land [Member]
Statement Line Items [Line Items]
Beginning Balance	176,145	176,807	182,316
Additions	0	0	0
Disposals	(22)	0	(1,354)
Transfers	2,950	8,325	2,338
Reclassification - cost		(137)	(212)
Transfers from/to other assets - cost	(1,893)	0	(24)
Depreciation	(8,004)	(7,632)	(6,257)
Write-off of depreciation	2	(7)	0
Reclassification - depreciation		(1,211)	0
Transfers from/to other assets - depreciation	(683)	0	0
Impairment losses	0	0	0
Business combinations	0	0
End Balance	168,494	176,145	176,807
Land [Member] | Gross carrying amount [Member]
Statement Line Items [Line Items]
Beginning Balance	206,330	198,141	197,393
Additions
Disposals
Transfers
Reclassification - cost
Transfers from/to other assets - cost
Depreciation
Write-off of depreciation
Reclassification - depreciation
Transfers from/to other assets - depreciation
Impairment losses
Business combinations
End Balance	207,365	206,330	198,141
Land [Member] | Accumulated Depreciation [Member]
Statement Line Items [Line Items]
Beginning Balance	(30,185)	(21,334)	(15,077)
Additions
Disposals
Transfers
Reclassification - cost
Transfers from/to other assets - cost
Depreciation
Write-off of depreciation
Reclassification - depreciation
Transfers from/to other assets - depreciation
Impairment losses
Business combinations
End Balance	(38,870)	(30,185)	(21,334)
Reservoirs, dams and water mains [Member]
Statement Line Items [Line Items]
Beginning Balance	1,394,162	1,376,246	1,185,614
Additions	0	171	0
Disposals	(132)	0	(414)
Transfers	400	95,799	140
Reclassification - cost		(1,434)	328,101
Transfers from/to other assets - cost	6,393	3	2
Depreciation	(79,276)	(75,659)	(68,562)
Write-off of depreciation	124	1	139
Reclassification - depreciation		(967)	(68,775)
Transfers from/to other assets - depreciation	(2,413)	3	0
Impairment losses	0	0	0
Business combinations	0	0
End Balance	1,319,257	1,394,162	1,376,246
Reservoirs, dams and water mains [Member] | Gross carrying amount [Member]
Statement Line Items [Line Items]
Beginning Balance	2,060,191	1,965,641	1,637,812
Additions
Disposals
Transfers
Reclassification - cost
Transfers from/to other assets - cost
Depreciation
Write-off of depreciation
Reclassification - depreciation
Transfers from/to other assets - depreciation
Impairment losses
Business combinations
End Balance	2,066,850	2,060,191	1,965,641
Reservoirs, dams and water mains [Member] | Accumulated Depreciation [Member]
Statement Line Items [Line Items]
Beginning Balance	(666,028)	(589,395)	(452,199)
Additions
Disposals
Transfers
Reclassification - cost
Transfers from/to other assets - cost
Depreciation
Write-off of depreciation
Reclassification - depreciation
Transfers from/to other assets - depreciation
Impairment losses
Business combinations
End Balance	(747,593)	(666,028)	(589,395)
Buildings, construction and improvements [Member]
Statement Line Items [Line Items]
Beginning Balance	1,153,220	1,075,982	1,517,475
Additions	0	0	168
Disposals	(140)	(421)	(4,093)
Transfers	154,737	177,902	61,615
Reclassification - cost		(40,852)	(499,943)
Transfers from/to other assets - cost	(154,880)	0	(6,548)
Depreciation	(59,736)	(54,035)	(50,716)
Write-off of depreciation	120	62	204
Reclassification - depreciation		(5,374)	68,711
Transfers from/to other assets - depreciation	1,930	(46)	0
Impairment losses	(474)	0	(10,891)
Business combinations	0	0
End Balance	1,094,777	1,153,220	1,075,982
Buildings, construction and improvements [Member] | Gross carrying amount [Member]
Statement Line Items [Line Items]
Beginning Balance	1,652,934	1,516,228	1,976,212
Additions
Disposals
Transfers
Reclassification - cost
Transfers from/to other assets - cost
Depreciation
Write-off of depreciation
Reclassification - depreciation
Transfers from/to other assets - depreciation
Impairment losses
Business combinations
End Balance	1,652,178	1,652,934	1,516,228
Buildings, construction and improvements [Member] | Accumulated Depreciation [Member]
Statement Line Items [Line Items]
Beginning Balance	(499,714)	(440,246)	(458,737)
Additions
Disposals
Transfers
Reclassification - cost
Transfers from/to other assets - cost
Depreciation
Write-off of depreciation
Reclassification - depreciation
Transfers from/to other assets - depreciation
Impairment losses
Business combinations
End Balance	(557,400)	(499,714)	(440,246)
Machinery and equipment [Member]
Statement Line Items [Line Items]
Beginning Balance	6,655,391	5,824,089	5,832,005
Additions	772	236	512
Disposals	(32,336)	(6,705)	(21,773)
Transfers	574,944	1,160,915	217,462
Reclassification - cost		52,205	172,169
Transfers from/to other assets - cost	98,579	(5,025)	6,598
Depreciation	(431,393)	(377,529)	(370,076)
Write-off of depreciation	9,529	4,694	3,572
Reclassification - depreciation		(1,002)	151
Transfers from/to other assets - depreciation	9,690	1,374	35
Impairment losses	(14,787)	0	(16,565)
Business combinations	0	2,140
End Balance	6,870,389	6,655,391	5,824,089
Machinery and equipment [Member] | Gross carrying amount [Member]
Statement Line Items [Line Items]
Beginning Balance	9,066,408	7,878,838	7,521,804
Additions
Disposals
Transfers
Reclassification - cost
Transfers from/to other assets - cost
Depreciation
Write-off of depreciation
Reclassification - depreciation
Transfers from/to other assets - depreciation
Impairment losses
Business combinations
End Balance	9,693,512	9,066,408	7,878,838
Machinery and equipment [Member] | Accumulated Depreciation [Member]
Statement Line Items [Line Items]
Beginning Balance	(2,411,017)	(2,054,749)	(1,689,799)
Additions
Disposals
Transfers
Reclassification - cost
Transfers from/to other assets - cost
Depreciation
Write-off of depreciation
Reclassification - depreciation
Transfers from/to other assets - depreciation
Impairment losses
Business combinations
End Balance	(2,823,123)	(2,411,017)	(2,054,749)
Vehicles [Member]
Statement Line Items [Line Items]
Beginning Balance	76,217	36,230	32,328
Additions	2,978	0	0
Disposals	(2,248)	(1,249)	(558)
Transfers	20,434	22,467	10,436
Reclassification - cost		12	22
Transfers from/to other assets - cost	(126)	(167)	(1)
Depreciation	(18,055)	(8,888)	(6,343)
Write-off of depreciation	1,379	480	379
Reclassification - depreciation		7	0
Transfers from/to other assets - depreciation	(8)	150	0
Impairment losses	0	0	(32)
Business combinations	(4,800)	27,175
End Balance	75,771	76,217	36,230
Vehicles [Member] | Gross carrying amount [Member]
Statement Line Items [Line Items]
Beginning Balance	106,920	52,947	43,081
Additions
Disposals
Transfers
Reclassification - cost
Transfers from/to other assets - cost
Depreciation
Write-off of depreciation
Reclassification - depreciation
Transfers from/to other assets - depreciation
Impairment losses
Business combinations
End Balance	122,540	106,920	52,947
Vehicles [Member] | Accumulated Depreciation [Member]
Statement Line Items [Line Items]
Beginning Balance	(30,704)	(16,717)	(10,753)
Additions
Disposals
Transfers
Reclassification - cost
Transfers from/to other assets - cost
Depreciation
Write-off of depreciation
Reclassification - depreciation
Transfers from/to other assets - depreciation
Impairment losses
Business combinations
End Balance	(46,769)	(30,704)	(16,717)
Furniture and fittings [Member]
Statement Line Items [Line Items]
Beginning Balance	7,562	9,696	11,660
Additions	0	0	0
Disposals	(635)	(779)	(284)
Transfers	1,484	456	578
Reclassification - cost		(39)	(137)
Transfers from/to other assets - cost	(330)	(452)	(186)
Depreciation	(1,332)	(1,676)	(1,926)
Write-off of depreciation	387	254	186
Reclassification - depreciation		11	(88)
Transfers from/to other assets - depreciation	108	91	0
Impairment losses	0	0	(106)
Business combinations	0	0
End Balance	7,245	7,562	9,696
Furniture and fittings [Member] | Gross carrying amount [Member]
Statement Line Items [Line Items]
Beginning Balance	21,507	22,323	22,462
Additions
Disposals
Transfers
Reclassification - cost
Transfers from/to other assets - cost
Depreciation
Write-off of depreciation
Reclassification - depreciation
Transfers from/to other assets - depreciation
Impairment losses
Business combinations
End Balance	22,026	21,507	22,323
Furniture and fittings [Member] | Accumulated Depreciation [Member]
Statement Line Items [Line Items]
Beginning Balance	(13,945)	(12,627)	(10,802)
Additions
Disposals
Transfers
Reclassification - cost
Transfers from/to other assets - cost
Depreciation
Write-off of depreciation
Reclassification - depreciation
Transfers from/to other assets - depreciation
Impairment losses
End Balance	(14,782)	(13,945)	(12,627)
In progress [Member]
Statement Line Items [Line Items]
Beginning Balance	250,302	674,166	388,088
Additions	753,137	1,084,612	583,538
Disposals	(8,332)	(26,696)	0
Transfers	(754,948)	(1,465,864)	(292,569)
Reclassification - cost		(1,219)	0
Transfers from/to other assets - cost	11,033	(10,523)	630
Depreciation	0	0	0
Write-off of depreciation	0	0	0
Reclassification - depreciation		0	0
Transfers from/to other assets - depreciation	0	0	0
Impairment losses	0	(5,221)	(5,519)
Business combinations	0	1,049
End Balance	251,192	250,302	674,166
In progress [Member] | Gross carrying amount [Member]
Statement Line Items [Line Items]
Beginning Balance	250,302	674,166	388,088
Additions
Disposals
Transfers
Reclassification - cost
Transfers from/to other assets - cost
Depreciation
Write-off of depreciation
Reclassification - depreciation
Transfers from/to other assets - depreciation
Impairment losses
End Balance	251,192	250,302	674,166
In progress [Member] | Accumulated Depreciation [Member]
Statement Line Items [Line Items]
Beginning Balance	0	0	0
Additions
Disposals
Transfers
Reclassification - cost
Transfers from/to other assets - cost
Depreciation
Write-off of depreciation
Reclassification - depreciation
Transfers from/to other assets - depreciation
Impairment losses
End Balance	R$ 0	R$ 0	R$ 0

(14) INTANGIBLE ASSETS (Details

(14) INTANGIBLE ASSETS (Details) - BRL (R$) R$ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Statement Line Items [Line Items]
Beginning balance	R$ 10775613	R$ 9210338	R$ 8930171
Additions	1,907,778	1,224,431	889,149
Amortization	(936,318)	(767,858)	(777,462)
Transfer - intangible assets	0	0	0
Transfer - financial asset	(972,254)	(655,456)	(330,062)
Transfers from concession financial asset - extended concessions			537,198
Disposal and transfer - other assets	(57,674)	(63,040)	(32,813)
Corporate restructuring - note 14.4.1	(99,981)
Business combination	(22,165)	1,870,268
Impairment losses	(5,176)	(43,070)	(5,844)
Ending balance	10,589,824	10,775,613	9,210,338
Goodwill [Member]
Statement Line Items [Line Items]
Beginning balance	6,115	6,115	6,115
Additions	0	0	0
Amortization	0	0	0
Transfer - intangible assets	0	0	0
Transfer - financial asset	0	0	0
Transfers from concession financial asset - extended concessions			0
Disposal and transfer - other assets	0	0	0
Corporate restructuring - note 14.4.1	0
Business combination	0	0
Impairment losses	0	0	0
Ending balance	6,115	6,115	6,115
Concession right Acquired in business combinations [Member]
Statement Line Items [Line Items]
Beginning balance	4,466,516	4,355,546	4,658,210
Additions	0	0	0
Amortization	(286,215)	(255,110)	(302,665)
Transfer - intangible assets	0	0	0
Transfer - financial asset	0	0	0
Transfers from concession financial asset - extended concessions			0
Disposal and transfer - other assets	(16,244)	(7,283)	0
Corporate restructuring - note 14.4.1	(26,766)
Business combination	(15,057)	413,796
Impairment losses	(5,129)	(40,433)	0
Ending balance	4,117,105	4,466,516	4,355,546
Concession right Distribution infrastructure - operational [Member]
Statement Line Items [Line Items]
Beginning balance	5,550,502	4,249,182	3,734,606
Additions	0	0	0
Amortization	(639,292)	(498,891)	(460,774)
Transfer - intangible assets	814,643	610,032	512,912
Transfer - financial asset	131	9,452	387
Transfers from concession financial asset - extended concessions			488,635
Disposal and transfer - other assets	(91,214)	(48,346)	(26,584)
Corporate restructuring - note 14.4.1	(73,215)
Business combination	(7,108)	1,229,074
Impairment losses	0	0	0
Ending balance	5,554,447	5,550,502	4,249,182
Concession right Distribution infrastructure - in progress [Member]
Statement Line Items [Line Items]
Beginning balance	666,008	499,627	414,574
Additions	1,898,434	1,213,924	879,851
Amortization	0	0	0
Transfer - intangible assets	(814,643)	(610,032)	(512,912)
Transfer - financial asset	(972,385)	(664,908)	(330,449)
Transfers from concession financial asset - extended concessions			48,563
Disposal and transfer - other assets	48,061	0	0
Corporate restructuring - note 14.4.1	0
Business combination	0	227,398
Impairment losses	0	0	0
Ending balance	825,476	666,008	499,627
Public utilities
Statement Line Items [Line Items]
Beginning balance	27,324	28,743	30,162
Additions	0	0	0
Amortization	(1,419)	(1,419)	(1,419)
Transfer - intangible assets	0	0	0
Transfer - financial asset	0	0	0
Transfers from concession financial asset - extended concessions			0
Disposal and transfer - other assets	0	0	0
Corporate restructuring - note 14.4.1	0
Business combination	0	0
Impairment losses	0	0	0
Ending balance	25,904	27,324	28,743
Other intangible assets [Member]
Statement Line Items [Line Items]
Beginning balance	59,147	71,125	86,503
Additions	9,344	10,507	9,298
Amortization	(9,390)	(12,438)	(12,604)
Transfer - intangible assets	0	0	0
Transfer - financial asset	0	0	0
Transfers from concession financial asset - extended concessions			0
Disposal and transfer - other assets	1,723	(7,410)	(6,228)
Corporate restructuring - note 14.4.1	0
Business combination	0	0
Impairment losses	(47)	(2,637)	(5,844)
Ending balance	60,777	59,147	71,125
Gross carrying amount [Member]
Statement Line Items [Line Items]
Beginning balance	20,481,188	18,525,004	17,620,433
Additions
Amortization
Transfer - intangible assets
Transfer - financial asset
Transfers from concession financial asset - extended concessions
Disposal and transfer - other assets
Corporate restructuring - note 14.4.1
Business combination
Impairment losses
Ending balance	20,043,048	20,481,188	18,525,004
Gross carrying amount [Member] | Goodwill [Member]
Statement Line Items [Line Items]
Beginning balance	6,152	6,152	6,152
Additions
Amortization
Transfer - intangible assets
Transfer - financial asset
Transfers from concession financial asset - extended concessions
Disposal and transfer - other assets
Corporate restructuring - note 14.4.1
Business combination
Impairment losses
Ending balance	6,152	6,152	6,152
Gross carrying amount [Member] | Concession right Acquired in business combinations [Member]
Statement Line Items [Line Items]
Beginning balance	7,602,941	7,441,902	7,441,935
Additions
Amortization
Transfer - intangible assets
Transfer - financial asset
Transfers from concession financial asset - extended concessions
Disposal and transfer - other assets
Corporate restructuring - note 14.4.1
Business combination
Impairment losses
Ending balance	7,558,645	7,602,941	7,441,902
Gross carrying amount [Member] | Concession right Distribution infrastructure - operational [Member]
Statement Line Items [Line Items]
Beginning balance	11,987,109	10,348,857	9,526,355
Additions
Amortization
Transfer - intangible assets
Transfer - financial asset
Transfers from concession financial asset - extended concessions
Disposal and transfer - other assets
Corporate restructuring - note 14.4.1
Business combination
Impairment losses
Ending balance	11,442,528	11,987,109	10,348,857
Gross carrying amount [Member] | Concession right Distribution infrastructure - in progress [Member]
Statement Line Items [Line Items]
Beginning balance	666,008	499,627	414,574
Additions
Amortization
Transfer - intangible assets
Transfer - financial asset
Transfers from concession financial asset - extended concessions
Disposal and transfer - other assets
Corporate restructuring - note 14.4.1
Business combination
Impairment losses
Ending balance	825,476	666,008	499,627
Gross carrying amount [Member] | Public utilities
Statement Line Items [Line Items]
Beginning balance	35,840	35,840	35,840
Additions
Amortization
Transfer - intangible assets
Transfer - financial asset
Transfers from concession financial asset - extended concessions
Disposal and transfer - other assets
Corporate restructuring - note 14.4.1
Business combination
Impairment losses
Ending balance	35,840	35,840	35,840
Gross carrying amount [Member] | Other intangible assets [Member]
Statement Line Items [Line Items]
Beginning balance	183,138	192,626	195,577
Additions
Amortization
Transfer - intangible assets
Transfer - financial asset
Transfers from concession financial asset - extended concessions
Disposal and transfer - other assets
Corporate restructuring - note 14.4.1
Business combination
Impairment losses
Ending balance	174,407	183,138	192,626
Accumulated depreciation, amortisation and impairment [Member]
Statement Line Items [Line Items]
Beginning balance	(9,705,576)	(9,314,665)	(8,690,262)
Additions
Amortization
Transfer - intangible assets
Transfer - financial asset
Transfers from concession financial asset - extended concessions
Disposal and transfer - other assets
Corporate restructuring - note 14.4.1
Business combination
Impairment losses
Ending balance	(9,453,223)	(9,705,576)	(9,314,665)
Accumulated depreciation, amortisation and impairment [Member] | Goodwill [Member]
Statement Line Items [Line Items]
Beginning balance	(37)	(37)	(37)
Additions
Amortization
Transfer - intangible assets
Transfer - financial asset
Transfers from concession financial asset - extended concessions
Disposal and transfer - other assets
Corporate restructuring - note 14.4.1
Business combination
Impairment losses
Ending balance	(37)	(37)	(37)
Accumulated depreciation, amortisation and impairment [Member] | Concession right Acquired in business combinations [Member]
Statement Line Items [Line Items]
Beginning balance	(3,136,425)	(3,086,356)	(2,783,725)
Additions
Amortization
Transfer - intangible assets
Transfer - financial asset
Transfers from concession financial asset - extended concessions
Disposal and transfer - other assets
Corporate restructuring - note 14.4.1
Business combination
Impairment losses
Ending balance	(3,441,540)	(3,136,425)	(3,086,356)
Accumulated depreciation, amortisation and impairment [Member] | Concession right Distribution infrastructure - operational [Member]
Statement Line Items [Line Items]
Beginning balance	(6,436,607)	(6,099,675)	(5,791,748)
Additions
Amortization
Transfer - intangible assets
Transfer - financial asset
Transfers from concession financial asset - extended concessions
Disposal and transfer - other assets
Corporate restructuring - note 14.4.1
Business combination
Impairment losses
Ending balance	(5,888,080)	(6,436,607)	(6,099,675)
Accumulated depreciation, amortisation and impairment [Member] | Concession right Distribution infrastructure - in progress [Member]
Statement Line Items [Line Items]
Beginning balance	0	0	0
Additions
Amortization
Transfer - intangible assets
Transfer - financial asset
Transfers from concession financial asset - extended concessions
Disposal and transfer - other assets
Corporate restructuring - note 14.4.1
Business combination
Impairment losses
Ending balance	0	0	0
Accumulated depreciation, amortisation and impairment [Member] | Public utilities
Statement Line Items [Line Items]
Beginning balance	(8,516)	(7,097)	(5,678)
Additions
Amortization
Transfer - intangible assets
Transfer - financial asset
Transfers from concession financial asset - extended concessions
Disposal and transfer - other assets
Corporate restructuring - note 14.4.1
Business combination
Impairment losses
Ending balance	(9,936)	(8,516)	(7,097)
Accumulated depreciation, amortisation and impairment [Member] | Other intangible assets [Member]
Statement Line Items [Line Items]
Beginning balance	(123,990)	(121,500)	(109,074)
Additions
Amortization
Transfer - intangible assets
Transfer - financial asset
Transfers from concession financial asset - extended concessions
Disposal and transfer - other assets
Corporate restructuring - note 14.4.1
Business combination
Impairment losses
Ending balance	R$ 113630	R$ 123990	R$ 121500

(14) INTANGIBLE ASSETS (Deta104

(14) INTANGIBLE ASSETS (Details 1) - Concession right Acquired in business combinations [Member] - BRL (R$) R$ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Statement Line Items [Line Items]
Total	R$ 4117105	R$ 4466516
Intangible asset acquired, not merged [Member]
Statement Line Items [Line Items]
Total	2,955,077	3,244,869
Intangible asset acquired, not merged [Member] | Parent [Member]
Statement Line Items [Line Items]
Total	136,317	149,845
Intangible asset acquired, not merged [Member] | Parent [Member] | Companhia Paulista de Forca e Luz ("CPFL Paulista") [Member]
Statement Line Items [Line Items]
Total	R$ 97858	R$ 107843
Annual amortization rate	3.28%	3.28%	4.78%
Intangible asset acquired, not merged [Member] | Parent [Member] | Companhia Piratininga de Forca e Luz ("CPFL Piratininga") [Member]
Statement Line Items [Line Items]
Total	R$ 14025	R$ 15319
Annual amortization rate	3.31%	3.31%	4.50%
Intangible asset acquired, not merged [Member] | Parent [Member] | Rio Grande Energia S.A. ("RGE") [Member]
Statement Line Items [Line Items]
Total	R$ 1323	R$ 1457
Annual amortization rate	4.25%	4.24%	5.51%
Intangible asset acquired, not merged [Member] | Parent [Member] | CPFL Geracao de Energia S.A. ("CPFL Geracao") [Member]
Statement Line Items [Line Items]
Total	R$ 19067	R$ 20912
Annual amortization rate	3.38%	3.38%	5.04%
Intangible asset acquired, not merged [Member] | Parent [Member] | CPFL Jaguari de Geracao de Energia Ltda ("CPFL Jaguari Geracao") [Member]
Statement Line Items [Line Items]
Total	R$ 4044	R$ 4314
Annual amortization rate	3.42%	3.41%	6.36%
Intangible asset acquired, not merged [Member] | Subsidiaries [Member]
Statement Line Items [Line Items]
Total	R$ 2818760	R$ 3095025
Intangible asset acquired, not merged [Member] | Subsidiaries [Member] | Rio Grande Energia S.A. ("RGE") [Member]
Statement Line Items [Line Items]
Total	R$ 429	R$ 473
Annual amortization rate	7.12%	9.41%	9.41%
Intangible asset acquired, not merged [Member] | Subsidiaries [Member] | CPFL Energias Renovaveis S.A. ("CPFL Renovaveis") [Member]
Statement Line Items [Line Items]
Total	R$ 2818331	R$ 2995028
Annual amortization rate	4.75%	5.39%	4.35%
Intangible asset acquired, not merged [Member] | Subsidiaries [Member] | RGE Sul Distribuidora de Energia S.A. ("RGE Sul") [Member]
Statement Line Items [Line Items]
Total	R$ 0	R$ 99524
Annual amortization rate	0.00%	9.09%	0.00%
Intangible asset acquired and merged - Deductible [Member] | Subsidiaries [Member]
Statement Line Items [Line Items]
Total	R$ 616837	R$ 678859
Intangible asset acquired and merged - Deductible [Member] | Subsidiaries [Member] | Rio Grande Energia S.A. ("RGE") [Member]
Statement Line Items [Line Items]
Total	R$ 234297	R$ 257924
Annual amortization rate	2.11%	2.11%	1.79%
Intangible asset acquired and merged - Deductible [Member] | Subsidiaries [Member] | CPFL Geracao de Energia S.A. ("CPFL Geracao") [Member]
Statement Line Items [Line Items]
Total	R$ 102987	R$ 112953
Annual amortization rate	2.34%	2.34%	3.80%
Intangible asset acquired and merged - Deductible [Member] | Subsidiaries [Member] | RGE Sul Distribuidora de Energia S.A. ("RGE Sul") [Member]
Statement Line Items [Line Items]
Total	R$ 279553	R$ 307982
Annual amortization rate	9.09%	9.09%	0.00%
Intangible asset acquired and merged - Reassessed [Member] | Parent [Member]
Statement Line Items [Line Items]
Total	R$ 493603	R$ 542787
Intangible asset acquired and merged - Reassessed [Member] | Parent [Member] | Companhia Paulista de Forca e Luz ("CPFL Paulista") [Member]
Statement Line Items [Line Items]
Total	R$ 319360	R$ 351565
Annual amortization rate	3.00%	3.00%	4.34%
Intangible asset acquired and merged - Reassessed [Member] | Parent [Member] | Companhia Piratininga de Forca e Luz ("CPFL Piratininga") [Member]
Statement Line Items [Line Items]
Total	R$ 41560	R$ 45395
Annual amortization rate	3.31%	3.31%	4.50%
Intangible asset acquired and merged - Reassessed [Member] | Parent [Member] | Rio Grande Energia S.A. ("RGE") [Member]
Statement Line Items [Line Items]
Total	R$ 125785	R$ 138469
Annual amortization rate	4.09%	4.09%	5.32%
Intangible asset acquired and merged - Reassessed [Member] | Parent [Member] | CPFL Geracao de Energia S.A. ("CPFL Geracao") [Member]
Statement Line Items [Line Items]
Total	R$ 6898	R$ 7358
Annual amortization rate	3.01%	3.01%	5.61%
Gross carrying amount [Member]
Statement Line Items [Line Items]
Total	R$ 7558645
Gross carrying amount [Member] | Intangible asset acquired, not merged [Member]
Statement Line Items [Line Items]
Total	4,127,238
Gross carrying amount [Member] | Intangible asset acquired, not merged [Member] | Parent [Member]
Statement Line Items [Line Items]
Total	409,527
Gross carrying amount [Member] | Intangible asset acquired, not merged [Member] | Parent [Member] | Companhia Paulista de Forca e Luz ("CPFL Paulista") [Member]
Statement Line Items [Line Items]
Total	304,861
Gross carrying amount [Member] | Intangible asset acquired, not merged [Member] | Parent [Member] | Companhia Piratininga de Forca e Luz ("CPFL Piratininga") [Member]
Statement Line Items [Line Items]
Total	39,065
Gross carrying amount [Member] | Intangible asset acquired, not merged [Member] | Parent [Member] | Rio Grande Energia S.A. ("RGE") [Member]
Statement Line Items [Line Items]
Total	3,150
Gross carrying amount [Member] | Intangible asset acquired, not merged [Member] | Parent [Member] | CPFL Geracao de Energia S.A. ("CPFL Geracao") [Member]
Statement Line Items [Line Items]
Total	54,555
Gross carrying amount [Member] | Intangible asset acquired, not merged [Member] | Parent [Member] | CPFL Jaguari de Geracao de Energia Ltda ("CPFL Jaguari Geracao") [Member]
Statement Line Items [Line Items]
Total	7,896
Gross carrying amount [Member] | Intangible asset acquired, not merged [Member] | Subsidiaries [Member]
Statement Line Items [Line Items]
Total	3,717,711
Gross carrying amount [Member] | Intangible asset acquired, not merged [Member] | Subsidiaries [Member] | Rio Grande Energia S.A. ("RGE") [Member]
Statement Line Items [Line Items]
Total	618
Gross carrying amount [Member] | Intangible asset acquired, not merged [Member] | Subsidiaries [Member] | CPFL Energias Renovaveis S.A. ("CPFL Renovaveis") [Member]
Statement Line Items [Line Items]
Total	3,717,093
Gross carrying amount [Member] | Intangible asset acquired, not merged [Member] | Subsidiaries [Member] | RGE Sul Distribuidora de Energia S.A. ("RGE Sul") [Member]
Statement Line Items [Line Items]
Total	0
Gross carrying amount [Member] | Intangible asset acquired and merged - Deductible [Member] | Subsidiaries [Member]
Statement Line Items [Line Items]
Total	1,859,457
Gross carrying amount [Member] | Intangible asset acquired and merged - Deductible [Member] | Subsidiaries [Member] | Rio Grande Energia S.A. ("RGE") [Member]
Statement Line Items [Line Items]
Total	1,120,266
Gross carrying amount [Member] | Intangible asset acquired and merged - Deductible [Member] | Subsidiaries [Member] | CPFL Geracao de Energia S.A. ("CPFL Geracao") [Member]
Statement Line Items [Line Items]
Total	426,450
Gross carrying amount [Member] | Intangible asset acquired and merged - Deductible [Member] | Subsidiaries [Member] | RGE Sul Distribuidora de Energia S.A. ("RGE Sul") [Member]
Statement Line Items [Line Items]
Total	312,741
Gross carrying amount [Member] | Intangible asset acquired and merged - Reassessed [Member] | Parent [Member]
Statement Line Items [Line Items]
Total	1,515,191
Gross carrying amount [Member] | Intangible asset acquired and merged - Reassessed [Member] | Parent [Member] | Companhia Paulista de Forca e Luz ("CPFL Paulista") [Member]
Statement Line Items [Line Items]
Total	1,074,026
Gross carrying amount [Member] | Intangible asset acquired and merged - Reassessed [Member] | Parent [Member] | Companhia Piratininga de Forca e Luz ("CPFL Piratininga") [Member]
Statement Line Items [Line Items]
Total	115,762
Gross carrying amount [Member] | Intangible asset acquired and merged - Reassessed [Member] | Parent [Member] | Rio Grande Energia S.A. ("RGE") [Member]
Statement Line Items [Line Items]
Total	310,128
Gross carrying amount [Member] | Intangible asset acquired and merged - Reassessed [Member] | Parent [Member] | CPFL Jaguari Geração Ltda. ("CPFL Jaguari Geração") [Member]
Statement Line Items [Line Items]
Total	15,275
Accumulated depreciation, amortisation and impairment [Member]
Statement Line Items [Line Items]
Total	(3,441,540)
Accumulated depreciation, amortisation and impairment [Member] | Intangible asset acquired, not merged [Member]
Statement Line Items [Line Items]
Total	(1,172,161)
Accumulated depreciation, amortisation and impairment [Member] | Intangible asset acquired, not merged [Member] | Parent [Member]
Statement Line Items [Line Items]
Total	(273,210)
Accumulated depreciation, amortisation and impairment [Member] | Intangible asset acquired, not merged [Member] | Parent [Member] | Companhia Paulista de Forca e Luz ("CPFL Paulista") [Member]
Statement Line Items [Line Items]
Total	(207,003)
Accumulated depreciation, amortisation and impairment [Member] | Intangible asset acquired, not merged [Member] | Parent [Member] | Companhia Piratininga de Forca e Luz ("CPFL Piratininga") [Member]
Statement Line Items [Line Items]
Total	(25,040)
Accumulated depreciation, amortisation and impairment [Member] | Intangible asset acquired, not merged [Member] | Parent [Member] | Rio Grande Energia S.A. ("RGE") [Member]
Statement Line Items [Line Items]
Total	(1,827)
Accumulated depreciation, amortisation and impairment [Member] | Intangible asset acquired, not merged [Member] | Parent [Member] | CPFL Geracao de Energia S.A. ("CPFL Geracao") [Member]
Statement Line Items [Line Items]
Total	(35,488)
Accumulated depreciation, amortisation and impairment [Member] | Intangible asset acquired, not merged [Member] | Parent [Member] | CPFL Jaguari de Geracao de Energia Ltda ("CPFL Jaguari Geracao") [Member]
Statement Line Items [Line Items]
Total	(3,852)
Accumulated depreciation, amortisation and impairment [Member] | Intangible asset acquired, not merged [Member] | Subsidiaries [Member]
Statement Line Items [Line Items]
Total	(898,951)
Accumulated depreciation, amortisation and impairment [Member] | Intangible asset acquired, not merged [Member] | Subsidiaries [Member] | Rio Grande Energia S.A. ("RGE") [Member]
Statement Line Items [Line Items]
Total	(189)
Accumulated depreciation, amortisation and impairment [Member] | Intangible asset acquired, not merged [Member] | Subsidiaries [Member] | CPFL Energias Renovaveis S.A. ("CPFL Renovaveis") [Member]
Statement Line Items [Line Items]
Total	(898,762)
Accumulated depreciation, amortisation and impairment [Member] | Intangible asset acquired, not merged [Member] | Subsidiaries [Member] | RGE Sul Distribuidora de Energia S.A. ("RGE Sul") [Member]
Statement Line Items [Line Items]
Total	0
Accumulated depreciation, amortisation and impairment [Member] | Intangible asset acquired and merged - Deductible [Member] | Subsidiaries [Member]
Statement Line Items [Line Items]
Total	(1,242,620)
Accumulated depreciation, amortisation and impairment [Member] | Intangible asset acquired and merged - Deductible [Member] | Subsidiaries [Member] | Rio Grande Energia S.A. ("RGE") [Member]
Statement Line Items [Line Items]
Total	(885,969)
Accumulated depreciation, amortisation and impairment [Member] | Intangible asset acquired and merged - Deductible [Member] | Subsidiaries [Member] | CPFL Geracao de Energia S.A. ("CPFL Geracao") [Member]
Statement Line Items [Line Items]
Total	(323,463)
Accumulated depreciation, amortisation and impairment [Member] | Intangible asset acquired and merged - Deductible [Member] | Subsidiaries [Member] | RGE Sul Distribuidora de Energia S.A. ("RGE Sul") [Member]
Statement Line Items [Line Items]
Total	(33,188)
Accumulated depreciation, amortisation and impairment [Member] | Intangible asset acquired and merged - Reassessed [Member] | Parent [Member]
Statement Line Items [Line Items]
Total	(1,021,588)
Accumulated depreciation, amortisation and impairment [Member] | Intangible asset acquired and merged - Reassessed [Member] | Parent [Member] | Companhia Paulista de Forca e Luz ("CPFL Paulista") [Member]
Statement Line Items [Line Items]
Total	(754,666)
Accumulated depreciation, amortisation and impairment [Member] | Intangible asset acquired and merged - Reassessed [Member] | Parent [Member] | Companhia Piratininga de Forca e Luz ("CPFL Piratininga") [Member]
Statement Line Items [Line Items]
Total	(74,202)
Accumulated depreciation, amortisation and impairment [Member] | Intangible asset acquired and merged - Reassessed [Member] | Parent [Member] | Rio Grande Energia S.A. ("RGE") [Member]
Statement Line Items [Line Items]
Total	(184,343)
Accumulated depreciation, amortisation and impairment [Member] | Intangible asset acquired and merged - Reassessed [Member] | Parent [Member] | CPFL Geracao de Energia S.A. ("CPFL Geracao") [Member]
Statement Line Items [Line Items]
Total	R$ 8377

(14) INTANGIBLE ASSETS (Deta105

(14) INTANGIBLE ASSETS (Details 2) - Business combinations [Member] - RGE Sul Distribuidora de Energia S.A. ("RGE Sul") [Member] R$ in Thousands	Oct. 31, 2016BRL (R$)
Statement Line Items [Line Items]
Consideration directly transferred to prior shareholders	R$ 1698455
Reimbursements due to adjustments related to agreement clauses	(106,616)
Consideration paid, net	R$ 1591839

(14) INTANGIBLE ASSETS (Deta106

(14) INTANGIBLE ASSETS (Details 3) R$ in Thousands	Oct. 31, 2016BRL (R$)
Consolidated (provisional)
Current assets
Cash and cash equivalents	R$ 95164
Consumers, concessionaries and licensees	580,945
Other current assets	89,548
Noncurrent assets
Consumers, concessionaries and licensees	54,111
Deferred tax assets	204,176
Concession financial asset	876,281
Intangible assets - Distribution infrastructure	1,456,472
Intangible acquired in this business combination	413,796
Other noncurrent assets	147,784
Current liabilities
Trade payables	(479,031)
Debentures and borrowings	(24,672)
Taxes, fees and contributions	(65,198)
Sector financial asset	(29,246)
Regulatory charges	(60,787)
Other current liabilities	(114,552)
Noncurrent liabilities
Debentures and borrowings	(1,131,949)
Sector financial asset	(64,935)
Provision for tax, civil and labor risks	(223,383)
Other noncurrent liabilities	(132,686)
Net assets acquired	1,591,839
Consideration paid, net	1,591,839
(-) Fair value of identifiable net assets acquired	1,591,839
Goodwill	0
Consolidated final
Current assets
Cash and cash equivalents	95,164
Consumers, concessionaries and licensees	580,945
Other current assets	89,548
Noncurrent assets
Consumers, concessionaries and licensees	79,501
Deferred tax assets	310,741
Concession financial asset	863,943
Intangible assets - Distribution infrastructure	1,444,401
Intangible acquired in this business combination	398,739
Other noncurrent assets	155,508
Current liabilities
Trade payables	(479,031)
Debentures and borrowings	(24,672)
Taxes, fees and contributions	(65,198)
Sector financial asset	(29,246)
Regulatory charges	(60,787)
Other current liabilities	(114,552)
Noncurrent liabilities
Debentures and borrowings	(1,131,949)
Sector financial asset	(64,939)
Provision for tax, civil and labor risks	(323,595)
Other noncurrent liabilities	(132,682)
Net assets acquired	1,591,839
Consideration paid, net	1,591,839
(-) Fair value of identifiable net assets acquired	1,591,839
Goodwill	R$ 0

(14) INTANGIBLE ASSETS (Deta107

(14) INTANGIBLE ASSETS (Details 4) - Business combinations [Member] - RGE Sul Distribuidora de Energia S.A. ("RGE Sul") [Member] R$ in Thousands	Oct. 31, 2016BRL (R$)
Statement Line Items [Line Items]
Labor lawsuits	R$ 11429
Civil lawsuits	83,575
Regulatory lawsuits	5,850
Environmental lawsuits	41,974
Tax lawsuits	7,236
Total	150,065
Provisions recognized in the subsidiary	173,530
Provisions for tax, civil and labor risks	R$ 323595

(14) INTANGIBLE ASSETS (Deta108

(14) INTANGIBLE ASSETS (Details 5) - Business combinations [Member] - RGE Sul Distribuidora de Energia S.A. ("RGE Sul") [Member] R$ in Thousands	Oct. 31, 2016BRL (R$)
Statement Line Items [Line Items]
Consideration paid, net	R$ 1591839
Cash and cash equivalent balances acquired	(95,164)
Cash and cash equivalent transferred, net	R$ 1496675

(14) INTANGIBLE ASSETS (Deta109

(14) INTANGIBLE ASSETS (Details 6) - Business combinations [Member] - RGE Sul Distribuidora de Energia S.A. ("RGE Sul") [Member] R$ in Thousands	12 Months Ended
	Dec. 31, 2016BRL (R$)
Statement Line Items [Line Items]
Net operating revenue	R$ 522677
Losses	R$ 27687

(14) INTANGIBLE ASSETS (Deta110

(14) INTANGIBLE ASSETS (Details 7) R$ in Thousands	12 Months Ended
	Dec. 31, 2016BRL (R$)
January to December, 2016
Net operating revenue - CPFL Energia Consolidado	R$ 19112089
Net profit (loss) - CPFL Energia Consolidado	879,057
Net operating revenue - Results for the period when the entity was not consolidated by	2,365,090
Net profit (loss) - Results for the period when the entity was not consolidated by	(403,839)
Net Operating Revenue	21,477,179
Profit or loss, net	R$ 475218

(14) INTANGIBLE ASSETS (Deta111

(14) INTANGIBLE ASSETS (Details Narrative) - BRL (R$) R$ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Intangible Assets Details Narrative
Extension of concessions - transfer of financial asset	R$ 0	R$ 0	R$ 0
Amortization of concession financial asset	(936,318)	(767,858)	(777,462)
Capitalized interest on borrowings	R$ 20726	R$ 13349	R$ 11358
Percentage of capitalized interest rate on borrowings	8.17%	7.74%	7.53%
Impairment of intangible asset	R$ 5176	R$ 43070	R$ 5844
Consideration directly transferred to prior shareholders	1,698,455
Consideration paid, net	1,591,839
Concession financial asset	148,487	R$ 45594
Indemnification asset	41,974
Contingent liabilities	150,065
Fair value of receivables acquired	660,446
Gross contractual amount of receivables	R$ 703672

(15) TRADE PAYABLES (Details)

(15) TRADE PAYABLES (Details) - BRL (R$) R$ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Current
System service charges	R$ 413	R$ 59935
Energy purchased	2,248,748	1,868,950
Electricity network usage charges	252,170	121,884
Materials and services	650,538	545,468
Energy from the Free Market	145,002	131,893
Total	3,296,870	2,728,130
Noncurrent
Energy purchased	128,438	129,148
Materials and services	0	633
Total	R$ 128438	R$ 129781

(16) DEBTS AND BORROWINGS (Deta

(16) DEBTS AND BORROWINGS (Details) - BRL (R$) R$ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Statement Line Items [Line Items]
Interest current	R$ 115658	R$ 129364
Interest noncurrent		144,709
Principal current	3,473,949	1,746,284
Principal noncurrent	7,402,450	11,023,685
Total	10,992,057	13,044,041
Borrowing costs - current	(4,420)	(5,213)
Borrowing costs - noncurrent	(27,396)	(32,930)
Borrowing costs	(31,816)	(38,143)
Borrowings raised	945,456
Repayments of principal	(3,041,812)
Interests, restatements and mark to market	784,526
Exchange rate variations	124,311
Interests paid	(864,467)
Borrowing costs
Statement Line Items [Line Items]
Borrowings raised	(6,415)
Repayments of principal	0
Interests, restatements and mark to market	12,742
Exchange rate variations	0
Interests paid	0
Measured at amortized cost [Member] | Local Currency [Member]
Statement Line Items [Line Items]
Interest current	94,624	107,303
Interest noncurrent		144,709
Principal current	1,167,484	1,158,159
Principal noncurrent	4,903,320	6,169,803
Total	6,165,427	7,579,974
Borrowings raised	382,611
Repayments of principal	(1,726,640)
Interests, restatements and mark to market	654,353
Exchange rate variations	0
Interests paid	(724,871)
Measured at amortized cost [Member] | Local Currency [Member] | Investment [Member]
Statement Line Items [Line Items]
Interest current	15,564	17,827
Interest noncurrent		0
Principal current	647,250	842,015
Principal noncurrent	3,882,601	4,606,227
Total	4,545,415	5,466,069
Borrowings raised	169,650
Repayments of principal	(1,151,289)
Interests, restatements and mark to market	440,526
Exchange rate variations	0
Interests paid	(379,542)
Measured at amortized cost [Member] | Local Currency [Member] | Rental assets [Member]
Statement Line Items [Line Items]
Interest current	13	38
Interest noncurrent		0
Principal current	1,180	1,034
Principal noncurrent	2,800	3,955
Total	3,993	5,028
Borrowings raised	0
Repayments of principal	(1,038)
Interests, restatements and mark to market	377
Exchange rate variations	0
Interests paid	(373)
Measured at amortized cost [Member] | Local Currency [Member] | Financial Institutions [Member]
Statement Line Items [Line Items]
Interest current	79,015	89,387
Interest noncurrent		144,709
Principal current	472,928	255,355
Principal noncurrent	989,335	1,517,251
Total	1,541,278	2,006,702
Borrowings raised	185,752
Repayments of principal	(515,824)
Interests, restatements and mark to market	207,812
Exchange rate variations	0
Interests paid	(343,163)
Measured at amortized cost [Member] | Local Currency [Member] | Other [Member]
Statement Line Items [Line Items]
Interest current	32	50
Interest noncurrent		0
Principal current	46,125	59,756
Principal noncurrent	28,584	42,370
Total	74,741	102,176
Borrowings raised	27,209
Repayments of principal	(58,490)
Interests, restatements and mark to market	5,638
Exchange rate variations	0
Interests paid	(1,793)
At fair value [member] | Foreign currency [Member]
Statement Line Items [Line Items]
Interest current	21,034	22,062
Interest noncurrent		0
Principal current	2,310,885	593,337
Principal noncurrent	2,526,526	4,886,812
Total	4,858,445	5,502,211
Borrowings raised	569,260
Repayments of principal	(1,315,172)
Interests, restatements and mark to market	117,431
Exchange rate variations	124,311
Interests paid	(139,596)
At fair value [member] | Foreign currency [Member] | Financial Institutions [Member]
Statement Line Items [Line Items]
Interest current	21,034	22,062
Interest noncurrent		0
Principal current	2,322,261	595,101
Principal noncurrent	2,573,703	4,922,463
Total	4,916,997	5,539,626
Borrowings raised	569,260
Repayments of principal	(1,315,172)
Interests, restatements and mark to market	138,568
Exchange rate variations	124,311
Interests paid	(139,596)
At fair value [member] | Foreign currency [Member] | Mark to market [Member]
Statement Line Items [Line Items]
Interest current	0	0
Interest noncurrent		0
Principal current	(11,375)	(1,764)
Principal noncurrent	(47,177)	(35,651)
Total	(58,552)	R$ 37415
Borrowings raised	0
Repayments of principal	0
Interests, restatements and mark to market	(21,137)
Exchange rate variations	0
Interests paid	R$ 0

(16) DEBTS AND BORROWINGS (D114

(16) DEBTS AND BORROWINGS (Details 1) - BRL (R$) R$ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Statement Line Items [Line Items]
Total	R$ 10992057	R$ 13044041
Borrowing costs	(31,816)	(38,143)
Measured at amortized cost [Member] | Local Currency [Member]
Statement Line Items [Line Items]
Total	6,165,427	7,579,974
Measured at amortized cost [Member] | Local Currency [Member] | Companhia Paulista de Forca e Luz ("CPFL Paulista") [Member]
Statement Line Items [Line Items]
Total	R$ 2410	2,960
Annual interest	RGR + 6% to 6.5%
Amortization	120 monthly installments from January 2013
Collateral	Receivables and promissory notes
Measured at amortized cost [Member] | Local Currency [Member] | Companhia Paulista de Forca e Luz ("CPFL Paulista") [Member] | FINEM V [Member]
Statement Line Items [Line Items]
Total	R$ 2883	37,078
Annual interest	TJLP + 2.12% to 3.3% (c)
Amortization	72 monthly installments from February 2012
Collateral	SGBP and CPFL Energia guarantee and receivables
Measured at amortized cost [Member] | Local Currency [Member] | Companhia Paulista de Forca e Luz ("CPFL Paulista") [Member] | FINEM V [Member]
Statement Line Items [Line Items]
Total	R$ 1892	3,638
Annual interest	Fixed rate 8% (c)
Amortization	90 monthly installments from August 2011
Collateral	SGBP and CPFL Energia guarantee and receivables
Measured at amortized cost [Member] | Local Currency [Member] | Companhia Paulista de Forca e Luz ("CPFL Paulista") [Member] | FINEM V [Member]
Statement Line Items [Line Items]
Total	R$ 23283	30,835
Annual interest	Fixed rate 5.5% (b)
Amortization	96 monthly installments from February 2013
Collateral	SGBP and CPFL Energia guarantee and receivables
Measured at amortized cost [Member] | Local Currency [Member] | Companhia Paulista de Forca e Luz ("CPFL Paulista") [Member] | FINEM VI [Member]
Statement Line Items [Line Items]
Total	R$ 101068	149,984
Annual interest	TJLP + 2.06% to 3.08% (e) (f)
Amortization	72 monthly installments from January 2014
Collateral	SGBP and CPFL Energia guarantee and receivables
Measured at amortized cost [Member] | Local Currency [Member] | Companhia Paulista de Forca e Luz ("CPFL Paulista") [Member] | FINEM VI [Member]
Statement Line Items [Line Items]
Total	R$ 7401	8,907
Annual interest	Fixed rate 2.5% (a)
Amortization	114 monthly installments from June 2013
Collateral	SGBP and CPFL Energia guarantee and receivables
Measured at amortized cost [Member] | Local Currency [Member] | Companhia Paulista de Forca e Luz ("CPFL Paulista") [Member] | FINEM VI [Member]
Statement Line Items [Line Items]
Total	R$ 135787	163,404
Annual interest	Fixed rate 2.5% (a)
Amortization	96 monthly installments from December 2014
Collateral	SGBP and CPFL Energia guarantee and receivables
Measured at amortized cost [Member] | Local Currency [Member] | Companhia Paulista de Forca e Luz ("CPFL Paulista") [Member] | FINEM VII [Member]
Statement Line Items [Line Items]
Total	R$ 29612	57,798
Annual interest	Fixed rate 6% (b)
Amortization	96 monthly installments from April 2016
Collateral	SGBP and CPFL Energia guarantee and receivables
Measured at amortized cost [Member] | Local Currency [Member] | Companhia Paulista de Forca e Luz ("CPFL Paulista") [Member] | FINEM VII [Member]
Statement Line Items [Line Items]
Total	R$ 32687	73,435
Annual interest	SELIC + 2.62% to 2.66% (h)
Amortization	72 monthly installments from April 2016
Collateral	SGBP and CPFL Energia guarantee and receivables
Measured at amortized cost [Member] | Local Currency [Member] | Companhia Paulista de Forca e Luz ("CPFL Paulista") [Member] | FINEM VII [Member]
Statement Line Items [Line Items]
Total	R$ 54259	132,622
Annual interest	TJLP + 2.12% to 2.66% (c) (d)
Amortization	72 monthly installments from April 2016
Collateral	SGBP and CPFL Energia guarantee and receivables
Measured at amortized cost [Member] | Local Currency [Member] | Companhia Paulista de Forca e Luz ("CPFL Paulista") [Member] | FINEME [Member]
Statement Line Items [Line Items]
Total	R$ 16904	25,356
Annual interest	Fixed rate 4.5%
Amortization	96 monthly installments from January 2012
Collateral	CPFL Energia guarantee
Measured at amortized cost [Member] | Local Currency [Member] | Companhia Piratininga de Forca e Luz ("CPFL Piratininga") [Member] | FINEM V [Member]
Statement Line Items [Line Items]
Total	R$ 29540	43,836
Annual interest	TJLP + 2.06% to 3.08% (e) (f)
Amortization	72 monthly installments from January 2014
Collateral	SGBP and CPFL Energia guarantee and receivables
Measured at amortized cost [Member] | Local Currency [Member] | Companhia Piratininga de Forca e Luz ("CPFL Piratininga") [Member] | FINEM V [Member]
Statement Line Items [Line Items]
Total	R$ 1944	2,339
Annual interest	Fixed rate 2.5% (a)
Amortization	114 monthly installments from June 2013
Collateral	SGBP and CPFL Energia guarantee and receivables
Measured at amortized cost [Member] | Local Currency [Member] | Companhia Piratininga de Forca e Luz ("CPFL Piratininga") [Member] | FINEM V [Member]
Statement Line Items [Line Items]
Total	R$ 33791	40,664
Annual interest	Fixed rate 2.5% (a)
Amortization	96 monthly installments from December 2014
Collateral	SGBP and CPFL Energia guarantee and receivables
Measured at amortized cost [Member] | Local Currency [Member] | Companhia Piratininga de Forca e Luz ("CPFL Piratininga") [Member] | FINEM VI [Member]
Statement Line Items [Line Items]
Total	R$ 37052	41,620
Annual interest	SELIC + 2.62% to 2.66% (h)
Amortization	72 monthly installments from April 2016
Collateral	SGBP and CPFL Energia guarantee and receivables
Measured at amortized cost [Member] | Local Currency [Member] | Companhia Piratininga de Forca e Luz ("CPFL Piratininga") [Member] | FINEM VI [Member]
Statement Line Items [Line Items]
Total	R$ 53823	65,778
Annual interest	TJLP + 2.12% to 2.66% (c) (d)
Amortization	72 monthly installments from April 2016
Collateral	SGBP and CPFL Energia guarantee and receivables
Measured at amortized cost [Member] | Local Currency [Member] | Companhia Piratininga de Forca e Luz ("CPFL Piratininga") [Member] | FINEM VI [Member]
Statement Line Items [Line Items]
Total	R$ 24308	28,198
Annual interest	Fixed rate 6% (b)
Amortization	96 monthly installments from April 2016
Collateral	SGBP and CPFL Energia guarantee and receivables
Measured at amortized cost [Member] | Local Currency [Member] | Companhia Piratininga de Forca e Luz ("CPFL Piratininga") [Member] | FINEME [Member]
Statement Line Items [Line Items]
Total	R$ 8016	12,023
Annual interest	Fixed rate 4.5%
Amortization	96 monthly installments from January 2012
Collateral	CPFL Energia guarantee
Measured at amortized cost [Member] | Local Currency [Member] | Companhia Piratininga de Forca e Luz ("CPFL Piratininga") [Member] | FINEM IV [Member]
Statement Line Items [Line Items]
Total	R$ 1553	19,970
Annual interest	TJLP + 2.12% to 3.3% (c)
Amortization	72 monthly installments from February 2012
Collateral	SGBP and CPFL Energia guarantee and receivables
Measured at amortized cost [Member] | Local Currency [Member] | Companhia Piratininga de Forca e Luz ("CPFL Piratininga") [Member] | FINEM IV [Member]
Statement Line Items [Line Items]
Total	R$ 610	1,173
Annual interest	Fixed rate 8% (c)
Amortization	90 monthly installments from August 2011
Collateral	SGBP and CPFL Energia guarantee and receivables
Measured at amortized cost [Member] | Local Currency [Member] | Companhia Piratininga de Forca e Luz ("CPFL Piratininga") [Member] | FINEM IV [Member]
Statement Line Items [Line Items]
Total	R$ 12108	16,035
Annual interest	Fixed rate 5.5% (b)
Amortization	96 monthly installments from February 2013
Collateral	SGBP and CPFL Energia guarantee and receivables
Measured at amortized cost [Member] | Local Currency [Member] | Rio Grande Energia S.A. ("RGE") [Member]
Statement Line Items [Line Items]
Total	R$ 3988	5,851
Annual interest	RGR + 6%
Amortization	120 monthly installments from May 2008
Collateral	Receivables and promissory notes
Measured at amortized cost [Member] | Local Currency [Member] | Rio Grande Energia S.A. ("RGE") [Member] | FINEM V [Member]
Statement Line Items [Line Items]
Total	R$ 1745	22,444
Annual interest	TJLP + 2.12% to 3.3% (c)
Amortization	72 monthly installments from February 2012
Collateral	SGBP and CPFL Energia guarantee and receivables
Measured at amortized cost [Member] | Local Currency [Member] | Rio Grande Energia S.A. ("RGE") [Member] | FINEM V [Member]
Statement Line Items [Line Items]
Total	R$ 8932	11,828
Annual interest	Fixed rate 5.5% (b)
Amortization	96 monthly installments from February 2013
Collateral	SGBP and CPFL Energia guarantee and receivables
Measured at amortized cost [Member] | Local Currency [Member] | Rio Grande Energia S.A. ("RGE") [Member] | FINEM VI [Member]
Statement Line Items [Line Items]
Total	R$ 53994	80,126
Annual interest	TJLP + 2.06% to 3.08% (e) (f)
Amortization	72 monthly installments from January 2014
Collateral	SGBP and CPFL Energia guarantee and receivables
Measured at amortized cost [Member] | Local Currency [Member] | Rio Grande Energia S.A. ("RGE") [Member] | FINEM VI [Member]
Statement Line Items [Line Items]
Total	R$ 783	942
Annual interest	Fixed rate 2.5% (a)
Amortization	114 monthly installments from June 2013
Collateral	SGBP and CPFL Energia guarantee and receivables
Measured at amortized cost [Member] | Local Currency [Member] | Rio Grande Energia S.A. ("RGE") [Member] | FINEM VI [Member]
Statement Line Items [Line Items]
Total	R$ 49930	60,085
Annual interest	Fixed rate 2.5% (a)
Amortization	96 monthly installments from December 2014
Collateral	SGBP and CPFL Energia guarantee and receivables
Measured at amortized cost [Member] | Local Currency [Member] | Rio Grande Energia S.A. ("RGE") [Member] | FINEM VII [Member]
Statement Line Items [Line Items]
Total	R$ 34001	39,442
Annual interest	Fixed rate 6% (b)
Amortization	96 monthly installments from April 2016
Collateral	SGBP and CPFL Energia guarantee and receivables
Measured at amortized cost [Member] | Local Currency [Member] | Rio Grande Energia S.A. ("RGE") [Member] | FINEM VII [Member]
Statement Line Items [Line Items]
Total	R$ 58097	65,261
Annual interest	SELIC + 2.62% to 2.66% (h)
Amortization	72 monthly installments from April 2016
Collateral	SGBP and CPFL Energia guarantee and receivables
Measured at amortized cost [Member] | Local Currency [Member] | Rio Grande Energia S.A. ("RGE") [Member] | FINEM VII [Member]
Statement Line Items [Line Items]
Total	R$ 66601	81,394
Annual interest	TJLP + 2.12% to 2.66% (d)
Amortization	72 monthly installments from April 2016
Collateral	SGBP and CPFL Energia guarantee and receivables
Measured at amortized cost [Member] | Local Currency [Member] | Rio Grande Energia S.A. ("RGE") [Member] | FINEME [Member]
Statement Line Items [Line Items]
Total	R$ 4022	6,033
Annual interest	Fixed rate 4.5%
Amortization	96 monthly installments from January 2012
Collateral	CPFL Energia guarantee
Measured at amortized cost [Member] | Local Currency [Member] | Rio Grande Energia S.A. ("RGE") [Member] | FINEME [Member]
Statement Line Items [Line Items]
Total	R$ 109	168
Annual interest	Fixed rate 10.0%
Amortization	90 monthly installments from May 2012
Collateral	Liens on assets
Measured at amortized cost [Member] | Local Currency [Member] | Rio Grande Energia S.A. ("RGE") [Member] | FINEME [Member]
Statement Line Items [Line Items]
Total	R$ 443	579
Annual interest	Fixed rate 10.0%
Amortization	66 monthly installments from October 2015
Collateral	Liens on assets
Measured at amortized cost [Member] | Local Currency [Member] | Companhia Leste Paulista de Energia ("CPFL Leste Paulista") [Member]
Statement Line Items [Line Items]
Total	R$ 0	338
Annual interest	RGR + 6%
Amortization	120 monthly installments from February 2008
Collateral	Receivables and promissory notes
Measured at amortized cost [Member] | Local Currency [Member] | Companhia Leste Paulista de Energia ("CPFL Leste Paulista") [Member] | FINEME [Member]
Statement Line Items [Line Items]
Total	R$ 0	3,397
Annual interest	Fixed rate 6%
Amortization	111 monthly installments from April 2015
Collateral	CPFL Energia guarantee
Measured at amortized cost [Member] | Local Currency [Member] | Companhia Leste Paulista de Energia ("CPFL Leste Paulista") [Member] | FINEME [Member]
Statement Line Items [Line Items]
Total	R$ 0	1,239
Annual interest	SELIC + 2.19%
Amortization	72 monthly installments from April 2015
Collateral	CPFL Energia guarantee
Measured at amortized cost [Member] | Local Currency [Member] | Companhia Leste Paulista de Energia ("CPFL Leste Paulista") [Member] | FINEME [Member]
Statement Line Items [Line Items]
Total	R$ 0	2,224
Annual interest	TJLP + 2.19%
Amortization	72 monthly installments from April 2015
Collateral	CPFL Energia guarantee
Measured at amortized cost [Member] | Local Currency [Member] | Companhia Sul Paulista de Energia ("CPFL Sul Paulista") [Member]
Statement Line Items [Line Items]
Total	R$ 0	303
Annual interest	RGR + 6%
Amortization	120 monthly installments from August 2007
Collateral	Receivables and promissory notes
Measured at amortized cost [Member] | Local Currency [Member] | Companhia Sul Paulista de Energia ("CPFL Sul Paulista") [Member] | FINEME [Member]
Statement Line Items [Line Items]
Total	R$ 0	2,412
Annual interest	Fixed rate 6%
Amortization	111 monthly installments from April 2015
Collateral	CPFL Energia guarantee
Measured at amortized cost [Member] | Local Currency [Member] | Companhia Sul Paulista de Energia ("CPFL Sul Paulista") [Member] | FINEME [Member]
Statement Line Items [Line Items]
Total	R$ 0	1,731
Annual interest	SELIC + 2.19%
Amortization	72 monthly installments from April 2015
Collateral	CPFL Energia guarantee
Measured at amortized cost [Member] | Local Currency [Member] | Companhia Sul Paulista de Energia ("CPFL Sul Paulista") [Member] | FINEME [Member]
Statement Line Items [Line Items]
Total	R$ 0	3,122
Annual interest	TJLP + 2.19%
Amortization	72 monthly installments from April 2015
Collateral	CPFL Energia guarantee
Measured at amortized cost [Member] | Local Currency [Member] | Companhia Luz e Forca de Mococa ("CPFL Mococa") [Member]
Statement Line Items [Line Items]
Total	R$ 0	122
Annual interest	RGR + 6%
Amortization	120 monthly installments from January 2008
Collateral	Receivables and promissory notes
Measured at amortized cost [Member] | Local Currency [Member] | Companhia Luz e Forca de Mococa ("CPFL Mococa") [Member] | Santander - Bank credit note [Member]
Statement Line Items [Line Items]
Total	R$ 0	1,883
Annual interest	TJLP + 3.1%
Amortization	96 monthly installments from June 2014
Collateral	CPFL Energia guarantee
Measured at amortized cost [Member] | Local Currency [Member] | Companhia Luz e Forca de Mococa ("CPFL Mococa") [Member] | Santander - Bank credit note [Member]
Statement Line Items [Line Items]
Total	R$ 0	736
Annual interest	UMBNDES + 2.1%
Amortization	96 monthly installments from June 2014
Collateral	CPFL Energia guarantee
Measured at amortized cost [Member] | Local Currency [Member] | Companhia Luz e Forca de Mococa ("CPFL Mococa") [Member] | Santander - Bank credit note [Member]
Statement Line Items [Line Items]
Total	R$ 0	1,413
Annual interest	UMBNDES +1.99%
Amortization	96 monthly installments from October 2015
Collateral	CPFL Energia guarantee
Measured at amortized cost [Member] | Local Currency [Member] | Companhia Luz e Forca de Mococa ("CPFL Mococa") [Member] | Santander - Bank credit note [Member]
Statement Line Items [Line Items]
Total	R$ 0	4,081
Annual interest	TJLP + 2.99% (f)
Amortization	96 monthly installments from October 2015
Collateral	CPFL Energia guarantee
Measured at amortized cost [Member] | Local Currency [Member] | RGE Sul Distribuidora de Energia S.A. ("RGE Sul") [Member]
Statement Line Items [Line Items]
Total	R$ 18970	25,946
Annual interest	RGR + 6%
Amortization	120 monthly installments from December 2008
Collateral	Bank guarantee; assignment of credit rights; and promissory notes
Measured at amortized cost [Member] | Local Currency [Member] | RGE Sul Distribuidora de Energia S.A. ("RGE Sul") [Member] | FINEP I [Member]
Statement Line Items [Line Items]
Total	R$ 4481	7,757
Annual interest	TJLP
Amortization	73 monthly installments from May 2016
Collateral	Bank guarantee
Measured at amortized cost [Member] | Local Currency [Member] | RGE Sul Distribuidora de Energia S.A. ("RGE Sul") [Member] | FINEP II [Member]
Statement Line Items [Line Items]
Total	R$ 5487	7,562
Annual interest	Fixed rate 5%
Amortization	81 monthly installments from September 2013
Collateral	Bank guarantee
Measured at amortized cost [Member] | Local Currency [Member] | CPFL Servicos, Equipamentos, Industria e Comercio S.A. ("CPFL Servicos") [Member] | FINEME [Member]
Statement Line Items [Line Items]
Total	R$ 1086	1,297
Annual interest	Fixed rate 2.5% to 5.5%
Amortization	96 monthly installments from August 2014
Collateral	CPFL Energia guarantee and liens on equipment
Measured at amortized cost [Member] | Local Currency [Member] | CPFL Servicos, Equipamentos, Industria e Comercio S.A. ("CPFL Servicos") [Member] | FINEME [Member]
Statement Line Items [Line Items]
Total	R$ 253	313
Annual interest	Fixed rate 6%
Amortization	72 monthly installments from April 2016
Collateral	CPFL Energia guarantee and liens on equipment
Measured at amortized cost [Member] | Local Currency [Member] | CPFL Servicos, Equipamentos, Industria e Comercio S.A. ("CPFL Servicos") [Member] | FINEME [Member]
Statement Line Items [Line Items]
Total	R$ 472	668
Annual interest	Fixed rate 7.7% to 10%
Amortization	90 monthly installments from November 2012
Collateral	CPFL Energia guarantee and liens on equipment
Measured at amortized cost [Member] | Local Currency [Member] | CPFL Servicos, Equipamentos, Industria e Comercio S.A. ("CPFL Servicos") [Member] | FINEME [Member]
Statement Line Items [Line Items]
Total	R$ 9534	11,292
Annual interest	Fixed rate 2.5% to 5.5%
Amortization	114 monthly installments from February 2013
Collateral	CPFL Energia guarantee and liens on equipment
Measured at amortized cost [Member] | Local Currency [Member] | CPFL Servicos, Equipamentos, Industria e Comercio S.A. ("CPFL Servicos") [Member] | FINEME [Member]
Statement Line Items [Line Items]
Total	R$ 33	47
Annual interest	TJLP + 4.2%
Amortization	90 monthly installments from November 2012
Collateral	CPFL Energia guarantee and liens on equipment
Measured at amortized cost [Member] | Local Currency [Member] | CPFL Servicos, Equipamentos, Industria e Comercio S.A. ("CPFL Servicos") [Member] | FINEME [Member]
Statement Line Items [Line Items]
Total	R$ 1839	2,249
Annual interest	Fixed rate 6%
Amortization	90 monthly installments from October 2014
Collateral	CPFL Energia guarantee and liens on equipment
Measured at amortized cost [Member] | Local Currency [Member] | CPFL Servicos, Equipamentos, Industria e Comercio S.A. ("CPFL Servicos") [Member] | FINEME [Member]
Statement Line Items [Line Items]
Total	R$ 88	101
Annual interest	Fixed rate 6%
Amortization	96 monthly installments from July 2016
Collateral	CPFL Energia guarantee and liens on equipment
Measured at amortized cost [Member] | Local Currency [Member] | CPFL Servicos, Equipamentos, Industria e Comercio S.A. ("CPFL Servicos") [Member] | FINEME [Member]
Statement Line Items [Line Items]
Total	R$ 5039	5,768
Annual interest	Fixed rate 6%
Amortization	114 monthly installments from June 2015
Collateral	CPFL Energia guarantee and liens on equipment
Measured at amortized cost [Member] | Local Currency [Member] | CPFL Servicos, Equipamentos, Industria e Comercio S.A. ("CPFL Servicos") [Member] | FINEME [Member]
Statement Line Items [Line Items]
Total	R$ 514	762
Annual interest	TJLP + 2.2% to 3.2% (c)
Amortization	56 monthly installments from July 2015
Collateral	CPFL Energia guarantee and liens on equipment
Measured at amortized cost [Member] | Local Currency [Member] | CPFL Servicos, Equipamentos, Industria e Comercio S.A. ("CPFL Servicos") [Member] | FINEME [Member]
Statement Line Items [Line Items]
Total	R$ 3060	3,870
Annual interest	Fixed rate 9.5% to 10% (c)
Amortization	66 monthly installments from October 2015
Collateral	CPFL Energia guarantee and liens on equipment
Measured at amortized cost [Member] | Local Currency [Member] | CPFL Servicos, Equipamentos, Industria e Comercio S.A. ("CPFL Servicos") [Member] | FINEME [Member]
Statement Line Items [Line Items]
Total	R$ 1276	1,589
Annual interest	Fixed rate 6% to 10% (e)
Amortization	66 monthly installments from August 2016
Collateral	CPFL Energia guarantee and liens on equipment
Measured at amortized cost [Member] | Local Currency [Member] | CPFL Servicos, Equipamentos, Industria e Comercio S.A. ("CPFL Servicos") [Member] | FINEME [Member]
Statement Line Items [Line Items]
Total	R$ 5216	5,832
Annual interest	TJLP + 3.50% (e)
Amortization	48 monthly installments from June 2017
Collateral	CPFL Energia guarantee and liens on equipment
Measured at amortized cost [Member] | Local Currency [Member] | CPFL Servicos, Equipamentos, Industria e Comercio S.A. ("CPFL Servicos") [Member] | FINEME [Member]
Statement Line Items [Line Items]
Total	R$ 1201	2,511
Annual interest	SELIC + 3.90%
Amortization	48 monthly installments from June 2017
Collateral	CPFL Energia guarantee and liens on equipment
Measured at amortized cost [Member] | Local Currency [Member] | CPFL Servicos, Equipamentos, Industria e Comercio S.A. ("CPFL Servicos") [Member] | FINEME [Member]
Statement Line Items [Line Items]
Total	R$ 1251	0
Annual interest	SELIC + 3.86%
Amortization	48 monthly installments from August 2017
Collateral	CPFL Energia guarantee and liens on equipment
Measured at amortized cost [Member] | Local Currency [Member] | CPFL Servicos, Equipamentos, Industria e Comercio S.A. ("CPFL Servicos") [Member] | FINEME [Member]
Statement Line Items [Line Items]
Total	R$ 1262	1,147
Annual interest	TJLP + 3.40%
Amortization	36 monthly installments from August 2017
Collateral	CPFL Energia guarantee and liens on equipment
Measured at amortized cost [Member] | Local Currency [Member] | CPFL Servicos, Equipamentos, Industria e Comercio S.A. ("CPFL Servicos") [Member] | FINEME [Member]
Statement Line Items [Line Items]
Total	R$ 588	495
Annual interest	SELIC + 3.74%
Amortization	36 monthly installments from August 2017
Collateral	CPFL Energia guarantee and liens on equipment
Measured at amortized cost [Member] | Local Currency [Member] | CPFL Servicos, Equipamentos, Industria e Comercio S.A. ("CPFL Servicos") [Member] | FINEME [Member]
Statement Line Items [Line Items]
Total	R$ 2613	0
Annual interest	SELIC + 3.58% to 3.72%
Amortization	36 monthly installments from January 2019
Collateral	CPFL Energia guarantee and liens on equipment
Measured at amortized cost [Member] | Local Currency [Member] | CPFL Servicos, Equipamentos, Industria e Comercio S.A. ("CPFL Servicos") [Member] | FINEME [Member]
Statement Line Items [Line Items]
Total	R$ 8905	0
Annual interest	TJLP + 3.25% to 3.38%
Amortization	36 monthly installments from January 2019
Collateral	CPFL Energia guarantee and liens on equipment
Measured at amortized cost [Member] | Local Currency [Member] | CERAN - Companhia Energetica Rio das Antas ("CERAN") [Member] | BNDES [Member]
Statement Line Items [Line Items]
Total	R$ 0	266,484
Annual interest	TJLP + 3.69% to 5%
Amortization	208 monthly installments from December 2005
Collateral	Pledge of shares; assignment of credit, concession rights and revenues
Measured at amortized cost [Member] | Local Currency [Member] | CERAN - Companhia Energetica Rio das Antas ("CERAN") [Member] | BNDES [Member]
Statement Line Items [Line Items]
Total	R$ 0	48,409
Annual interest	UMBNDES + 5% (1)
Amortization	208 monthly installments from February 2006
Collateral	Pledge of shares; assignment of credit, concession rights and revenues
Measured at amortized cost [Member] | Local Currency [Member] | CPFL Transmissao Piracicaba S.A ("CPFL Transmissao Piracicaba") [Member] | FINEME [Member]
Statement Line Items [Line Items]
Total	R$ 14275	16,871
Annual interest	Fixed rate 3.0%
Amortization	96 monthly installments from July 2015
Collateral	CPFL Energia guarantee
Measured at amortized cost [Member] | Local Currency [Member] | CPFL Telecom S.A ("CPFL Telecom") [Member] | FINEME [Member]
Statement Line Items [Line Items]
Total	R$ 0	7,448
Annual interest	Fixed rate 6.0% (b)
Amortization	60 monthly installments from December 2016
Collateral	CPFL Energia guarantee
Measured at amortized cost [Member] | Local Currency [Member] | CPFL Telecom S.A ("CPFL Telecom") [Member] | FINEME [Member]
Statement Line Items [Line Items]
Total	R$ 0	7,849
Annual interest	SELIC + 3.12% (h)
Amortization	60 monthly installments from December 2016
Collateral	CPFL Energia guarantee
Measured at amortized cost [Member] | Local Currency [Member] | CPFL Telecom S.A ("CPFL Telecom") [Member] | FINEME [Member]
Statement Line Items [Line Items]
Total	R$ 0	21,342
Annual interest	TJLP + 2.12% to 3.12% (c)
Amortization	60 monthly installments from December 2016
Collateral	CPFL Energia guarantee
Measured at amortized cost [Member] | Local Currency [Member] | CPFL Telecom S.A ("CPFL Telecom") [Member] | FINEME [Member]
Statement Line Items [Line Items]
Total	R$ 0	470
Annual interest	TJLP
Amortization	60 monthly installments from December 2016
Collateral	CPFL Energia guarantee
Measured at amortized cost [Member] | Local Currency [Member] | CPFL Energias Renovaveis S.A. ("CPFL Renovaveis") [Member] | FINEM V [Member]
Statement Line Items [Line Items]
Total	R$ 69485	80,362
Annual interest	TJLP + 2.8% to 3.4%
Amortization	143 monthly installments from December 2011
Collateral	CPFL Renováveis guarantee; pledge of subsidiary's shares; liens on assets; and assignment of credit and concession rights
Measured at amortized cost [Member] | Local Currency [Member] | CPFL Energias Renovaveis S.A. ("CPFL Renovaveis") [Member] | FINEM VI [Member]
Statement Line Items [Line Items]
Total	R$ 69619	74,737
Annual interest	TJLP + 2.05%
Amortization	192 monthly installments from October 2013
Collateral	SGBP, CPFL Energia and CPFL Renováveis guarantees; pledge of subsidiary's shares; and assignment of credit and concession rights
Measured at amortized cost [Member] | Local Currency [Member] | CPFL Energias Renovaveis S.A. ("CPFL Renovaveis") [Member] | FINEM VII [Member]
Statement Line Items [Line Items]
Total	R$ 119234	138,474
Annual interest	TJLP + 1.92 %
Amortization	156 monthly installments from October 2010
Collateral	Pledge of subsidiary's shares; liens on assets; and assignment of credit and concession rights
Measured at amortized cost [Member] | Local Currency [Member] | CPFL Energias Renovaveis S.A. ("CPFL Renovaveis") [Member] | FINEP I [Member]
Statement Line Items [Line Items]
Total	R$ 904	1,397
Annual interest	Fixed rate 3.5%
Amortization	61 monthly installments from October 2014
Collateral	Bank guarantee
Measured at amortized cost [Member] | Local Currency [Member] | CPFL Energias Renovaveis S.A. ("CPFL Renovaveis") [Member] | FINEP II [Member]
Statement Line Items [Line Items]
Total	R$ 9516	10,445
Annual interest	TJLP - 1.0%
Amortization	85 monthly installments from June 2017
Collateral	Bank guarantee
Measured at amortized cost [Member] | Local Currency [Member] | CPFL Energias Renovaveis S.A. ("CPFL Renovaveis") [Member] | FINEM I [Member]
Statement Line Items [Line Items]
Total	R$ 232310	262,224
Annual interest	TJLP + 1.95%
Amortization	168 monthly installments from October 2009
Collateral	Pledge of the subdidiary's and PCH Holding's shares; assignment of credit and concession rights ; and liens on equipment
Measured at amortized cost [Member] | Local Currency [Member] | CPFL Energias Renovaveis S.A. ("CPFL Renovaveis") [Member] | FINEM II [Member]
Statement Line Items [Line Items]
Total	R$ 18951	22,210
Annual interest	TJLP + 1.90%
Amortization	144 monthly installments from June 2011
Collateral	CPFL Energia and CPFL Bioenergia guarantees, liens on assets and assignment of credit rights
Measured at amortized cost [Member] | Local Currency [Member] | CPFL Energias Renovaveis S.A. ("CPFL Renovaveis") [Member] | FINEM III [Member]
Statement Line Items [Line Items]
Total	R$ 460623	495,912
Annual interest	TJLP + 1.72%
Amortization	192 monthly installments from May 2013
Collateral	SGBP and CPFL Energia guarantees; pledge of subsidiary's shares; liens on assets; and assignment of credit rights
Measured at amortized cost [Member] | Local Currency [Member] | CPFL Energias Renovaveis S.A. ("CPFL Renovaveis") [Member] | FINEM IX [Member]
Statement Line Items [Line Items]
Total	R$ 17827	25,195
Annual interest	TJLP + 2.15%
Amortization	120 monthly installments from May 2010
Collateral	SGBP, CPFL Energia and CPFL Renováveis guarantees; pledge of subsidiary's shares; liens on assets; assignment of credit and concession rights and real estate mortgage
Measured at amortized cost [Member] | Local Currency [Member] | CPFL Energias Renovaveis S.A. ("CPFL Renovaveis") [Member] | FINEM X [Member]
Statement Line Items [Line Items]
Total	R$ 0	230
Annual interest	TJLP
Amortization	84 monthly installments from October 2010
Collateral	Pledge of subsidiary's shares; liens on assets; and assignment of credit and concession rights
Measured at amortized cost [Member] | Local Currency [Member] | CPFL Energias Renovaveis S.A. ("CPFL Renovaveis") [Member] | FINEM XI [Member]
Statement Line Items [Line Items]
Total	R$ 95016	105,670
Annual interest	TJLP + 1.87% to 1.9%
Amortization	168 monthly installments from January 2012
Collateral	CPFL Energia guarantee; liens on assets; and assignment of credit rights
Measured at amortized cost [Member] | Local Currency [Member] | CPFL Energias Renovaveis S.A. ("CPFL Renovaveis") [Member] | FINEM XII [Member]
Statement Line Items [Line Items]
Total	R$ 297835	317,289
Annual interest	TJLP and TJLP + 2.18%
Amortization	192 monthly installments from July 2014
Collateral	SGBP, CPFL Energia, CPFL Renováveis and Eólica Holding guarantees; pledge of the subsidiary's and Eólica Holding's shares; liens on assets; assignment of credit and concession rights
Measured at amortized cost [Member] | Local Currency [Member] | CPFL Energias Renovaveis S.A. ("CPFL Renovaveis") [Member] | FINEM XIII [Member]
Statement Line Items [Line Items]
Total	R$ 298439	318,257
Annual interest	TJLP + 2.02% to 2.18%
Amortization	192 monthly installments from November 2014
Collateral	SGBP, CPFL Energia and CPFL Renováveis guarantees; pledge of the subsidiary's shares; liens on assets; assignment of credit and concession rights
Measured at amortized cost [Member] | Local Currency [Member] | CPFL Energias Renovaveis S.A. ("CPFL Renovaveis") [Member] | FINEM XIV [Member]
Statement Line Items [Line Items]
Total	R$ 23185	27,305
Annual interest	TJLP + 3.44%
Amortization	139 monthly installments from September 2011
Collateral	SGBP, CPFL Energia and CPFL Renováveis guarantees; pledge of the subsidiary's shares; and assignment of credit and concession rights
Measured at amortized cost [Member] | Local Currency [Member] | CPFL Energias Renovaveis S.A. ("CPFL Renovaveis") [Member] | FINEM XV [Member]
Statement Line Items [Line Items]
Total	R$ 4335	6,418
Annual interest	Fixed rate 5.50%
Amortization	101 monthly installments from September 2011
Collateral	SGBP, CPFL Energia and CPFL Renováveis guarantees; pledge of the subsidiary's shares; and assignment of credit and concession rights
Measured at amortized cost [Member] | Local Currency [Member] | CPFL Energias Renovaveis S.A. ("CPFL Renovaveis") [Member] | FINEM XVI [Member]
Statement Line Items [Line Items]
Total	R$ 428205	460,426
Annual interest	TJLP and TJLP + 2.18%
Amortization	192 monthly installments from January 2013
Collateral	Bank guarantee; pledge of the subsidiary's and DESA Eólica's shares; liens on assets; and assignment of credit and concession rights
Measured at amortized cost [Member] | Local Currency [Member] | CPFL Energias Renovaveis S.A. ("CPFL Renovaveis") [Member] | FINEM XVII [Member]
Statement Line Items [Line Items]
Total	R$ 9044	13,763
Annual interest	Fixed rate 4.5%
Amortization	102 monthly installments from June 2011
Collateral	CPFL Energia and Bioenergia guarantees; liens on assets; and assignment of credit rights
Measured at amortized cost [Member] | Local Currency [Member] | CPFL Energias Renovaveis S.A. ("CPFL Renovaveis") [Member] | FINEM XVIII [Member]
Statement Line Items [Line Items]
Total	R$ 27579	29,559
Annual interest	TJLP + 2.02%
Amortization	192 monthly installments from January 2014
Collateral	SGBP, CPFL Energia and CPFL Renováveis guarantees; pledge of subsidiary's shares; liens on assets; and assignment of credit and concession rights
Measured at amortized cost [Member] | Local Currency [Member] | CPFL Energias Renovaveis S.A. ("CPFL Renovaveis") [Member] | FINEM XIX [Member]
Statement Line Items [Line Items]
Total	R$ 37208	44,650
Annual interest	Fixed rate 2.5%
Amortization	108 monthly installments from January 2014
Collateral	SGBP, CPFL Energia and CPFL Renováveis guarantees; pledge of subsidiary's shares; liens on assets; and assignment of credit and concession rights
Measured at amortized cost [Member] | Local Currency [Member] | CPFL Energias Renovaveis S.A. ("CPFL Renovaveis") [Member] | FINEM XX [Member]
Statement Line Items [Line Items]
Total	R$ 37583	40,281
Annual interest	TJLP + 2.02%
Amortization	192 monthly installments from January 2014
Collateral	SGBP, CPFL Energia and CPFL Renováveis guarantees; pledge of subsidiary's shares; liens on assets; and assignment of credit and concession rights
Measured at amortized cost [Member] | Local Currency [Member] | CPFL Energias Renovaveis S.A. ("CPFL Renovaveis") [Member] | FINEM XXI [Member]
Statement Line Items [Line Items]
Total	R$ 32734	39,281
Annual interest	Fixed rate 2.5%
Amortization	108 monthly installments from January 2014
Collateral	SGBP, CPFL Energia and CPFL Renováveis guarantees; pledge of subsidiary's shares; liens on assets; and assignment of credit and concession rights
Measured at amortized cost [Member] | Local Currency [Member] | CPFL Energias Renovaveis S.A. ("CPFL Renovaveis") [Member] | FINEM XXII [Member]
Statement Line Items [Line Items]
Total	R$ 1153	1,729
Annual interest	Fixed rate 4.5%
Amortization	102 monthly installments from June 2011
Collateral	Pledge of subsidiary's shares; liens on assets; and assignment of credit and concession rights
Measured at amortized cost [Member] | Local Currency [Member] | CPFL Energias Renovaveis S.A. ("CPFL Renovaveis") [Member] | FINEM XXIII [Member]
Statement Line Items [Line Items]
Total	R$ 82632	109,580
Annual interest	Fixed rate 5.5%
Amortization	108 monthly installments from January 2012
Collateral	SGBP and CPFL Energia guarantees; liens on assets; and assignment of credit rights
Measured at amortized cost [Member] | Local Currency [Member] | CPFL Energias Renovaveis S.A. ("CPFL Renovaveis") [Member] | FINEM XXIV [Member]
Statement Line Items [Line Items]
Total	R$ 83136	87,492
Annual interest	TJLP + 2.18%
Amortization	192 monthly installments from July 2016
Collateral	SGBP and CPFL Energia guarantees; pledge of subsidiary's shares; liens on assets; and assignment of credit and concession rights
Measured at amortized cost [Member] | Local Currency [Member] | CPFL Energias Renovaveis S.A. ("CPFL Renovaveis") [Member] | FINEM XXV [Member]
Statement Line Items [Line Items]
Total	R$ 681912	525,011
Annual interest	TJLP + 2.75%
Amortization	192 monthly installments from July 2017
Collateral	SGBP and CPFL Energia guarantees; pledge of subsidiary's and T-16's shares; liens on assets; and assignment of credit and concession rights
Measured at amortized cost [Member] | Local Currency [Member] | CPFL Energias Renovaveis S.A. ("CPFL Renovaveis") [Member] | FINEM XXVI [Member]
Statement Line Items [Line Items]
Total	R$ 67584	70,532
Annual interest	TJLP + 2,02%
Amortization	162 monthly installments from November 2016
Collateral	SGBP, CPFL Energia and CPFL Renováveis guarantees; pledge of subsidiary's shares; and assignment of credit and concession rights
Measured at amortized cost [Member] | Local Currency [Member] | CPFL Energias Renovaveis S.A. ("CPFL Renovaveis") [Member] | FINEM XXVII [Member]
Statement Line Items [Line Items]
Total	R$ 1415	0
Annual interest	TJLP
Amortization	144 monthly installments from January 2018
Collateral	SGBP, CPFL Energia and CPFL Renováveis guarantees; pledge of subsidiary's shares; liens on assets; and assignment of credit and concession rights
Measured at amortized cost [Member] | Local Currency [Member] | CPFL Energias Renovaveis S.A. ("CPFL Renovaveis") [Member] | FINAME IV [Member]
Statement Line Items [Line Items]
Total	R$ 2387	2,857
Annual interest	Fixed rate 2.5%
Amortization	96 monthly installments from February 2015
Collateral	CPFL Renováveis guarantee; and liens on assets
Measured at amortized cost [Member] | Local Currency [Member] | CPFL Energias Renovaveis S.A. ("CPFL Renovaveis") [Member] | FINEP III [Member]
Statement Line Items [Line Items]
Total	R$ 4091	5,232
Annual interest	TJLP + 2.0%
Amortization	73 monthly installments from July 2015
Collateral	Bank guarantee
Measured at amortized cost [Member] | Local Currency [Member] | CPFL Energias Renovaveis S.A. ("CPFL Renovaveis") [Member] | BNB I [Member]
Statement Line Items [Line Items]
Total	R$ 92926	100,323
Annual interest	Fixed rate 9.5% to 10% and compliance bonus of 15%
Amortization	168 monthly installments from January 2009
Collateral	SIIF Énergies do Brasil guarantee; pledge of subsidiary's shares; liens on assets; and assignment of credit and concession rights
Measured at amortized cost [Member] | Local Currency [Member] | CPFL Energias Renovaveis S.A. ("CPFL Renovaveis") [Member] | BNB II [Member]
Statement Line Items [Line Items]
Total	R$ 151428	158,364
Annual interest	Fixed rate 10% and compliance bonus of 15% to 25%
Amortization	222 monthly installments from May 2010
Collateral	BVP S.A. and bank guarantees; pledge of subsidiary's shares; liens on assets; and assignment of credit and concession rights
Measured at amortized cost [Member] | Local Currency [Member] | CPFL Energias Renovaveis S.A. ("CPFL Renovaveis") [Member] | BNB III [Member]
Statement Line Items [Line Items]
Total	R$ 27138	29,020
Annual interest	Fixed rate 9.5% and compliance bonus of 25%
Amortization	228 monthly installments from July 2009
Collateral	CPFL Renováveis guarantee; pledge of subsidiary's shares; liens on assets; and assignment of credit and concession rights
Measured at amortized cost [Member] | Local Currency [Member] | CPFL Energias Renovaveis S.A. ("CPFL Renovaveis") [Member] | NIB [Member]
Statement Line Items [Line Items]
Total	R$ 57291	67,872
Annual interest	IGPM + 8.63%
Amortization	50 quarterly installments from June 2011
Collateral	Pledge of subsidiary's shares; liens on assets; and assignment of credit and concession rights
Measured at amortized cost [Member] | Local Currency [Member] | CPFL Comercializacao Brasil S.A. ("CPFL Brasil") [Member] | FINEP [Member]
Statement Line Items [Line Items]
Total	R$ 2281	2,923
Annual interest	Fixed rate 4.5% to 8.7%
Amortization	96 monthly installments from March 2012
Collateral	CPFL Energia guarantee
Measured at amortized cost [Member] | Local Currency [Member] | CPFL Eficiencia Energetica S.A ("CPFL ESCO") [Member] | FINEME [Member]
Statement Line Items [Line Items]
Total	R$ 81	99
Annual interest	Fixed rate 6%
Amortization	72 monthly installments from October 2016
Collateral	CPFL Energia guarantee
Measured at amortized cost [Member] | Local Currency [Member] | CPFL Eficiencia Energetica S.A ("CPFL ESCO") [Member] | FINEME [Member]
Statement Line Items [Line Items]
Total	R$ 171	234
Annual interest	TJLP + 2.70%
Amortization	48 monthly installments from August 2016
Collateral	CPFL Energia guarantee
Measured at amortized cost [Member] | Local Currency [Member] | CPFL Eficiencia Energetica S.A ("CPFL ESCO") [Member] | FINEME [Member]
Statement Line Items [Line Items]
Total	R$ 174	219
Annual interest	SELIC + 2.70%
Amortization	48 monthly installments from August 2016
Collateral	CPFL Energia guarantee
Measured at amortized cost [Member] | Local Currency [Member] | CPFL Eficiencia Energetica S.A ("CPFL ESCO") [Member] | FINEME [Member]
Statement Line Items [Line Items]
Total	R$ 100	121
Annual interest	Fixed rate 9.5%
Amortization	36 monthly installments from September 2017
Collateral	CPFL Energia guarantee
Measured at amortized cost [Member] | Local Currency [Member] | CPFL Eficiencia Energetica S.A ("CPFL ESCO") [Member] | FINEME [Member]
Statement Line Items [Line Items]
Total	R$ 515	678
Annual interest	Fixed rate 9.5%
Amortization	48 monthly installments from February 2017
Collateral	CPFL Energia guarantee and liens on equipment
Measured at amortized cost [Member] | Local Currency [Member] | CPFL Eficiencia Energetica S.A ("CPFL ESCO") [Member] | FINEME [Member]
Statement Line Items [Line Items]
Total	R$ 672	753
Annual interest	TJLP + 3.50%
Amortization	48 monthly installments from August 2017
Collateral	CPFL Energia guarantee and liens on equipment
Measured at amortized cost [Member] | Local Currency [Member] | Companhia Paulista de Forca e Luz ("CPFL Paulista") [Member] | Banco do Brasil - Working capital [Member]
Statement Line Items [Line Items]
Total	R$ 0	380,403
Annual interest	104.90% of CDI (f)
Amortization	2 annual installments from July 2017
Collateral	CPFL Energia guarantee
Measured at amortized cost [Member] | Local Currency [Member] | Companhia Piratininga de Forca e Luz ("CPFL Piratininga") [Member] | Banco do Brasil - Working capital [Member]
Statement Line Items [Line Items]
Total	R$ 0	66,951
Annual interest	104.90% of CDI (f)
Amortization	2 annual installments from July 2017
Collateral	CPFL Energia guarantee
Measured at amortized cost [Member] | Local Currency [Member] | Companhia Leste Paulista de Energia ("CPFL Leste Paulista") [Member] | Banco IBM - Working capital [Member]
Statement Line Items [Line Items]
Total	R$ 0	5,405
Annual interest	100.0% of CDI
Amortization	14 semiannual installments from December 2012
Collateral	CPFL Energia guarantee
Measured at amortized cost [Member] | Local Currency [Member] | Companhia Leste Paulista de Energia ("CPFL Leste Paulista") [Member] | Banco IBM - Working capital [Member]
Statement Line Items [Line Items]
Total	R$ 0	20,955
Annual interest	CDI + 0.1%
Amortization	12 semiannual installments from October 2014
Collateral	CPFL Energia guarantee
Measured at amortized cost [Member] | Local Currency [Member] | Companhia Leste Paulista de Energia ("CPFL Leste Paulista") [Member] | Banco IBM - Working capital [Member]
Statement Line Items [Line Items]
Total	R$ 0	15,658
Annual interest	CDI + 0.27%
Amortization	12 semiannual installments from March 2015
Collateral	CPFL Energia guarantee
Measured at amortized cost [Member] | Local Currency [Member] | Companhia Leste Paulista de Energia ("CPFL Leste Paulista") [Member] | Banco IBM - Working capital [Member]
Statement Line Items [Line Items]
Total	R$ 0	6,993
Annual interest	CDI + 1.33% (f)
Amortization	8 semiannual installments from January 2016
Collateral	CPFL Energia guarantee
Measured at amortized cost [Member] | Local Currency [Member] | Companhia Sul Paulista de Energia ("CPFL Sul Paulista") [Member] | Banco do Brasil - Working capital [Member]
Statement Line Items [Line Items]
Total	R$ 0	31,954
Annual interest	104.90% of CDI (f)
Amortization	2 annual installments from July 2017
Collateral	CPFL Energia guarantee
Measured at amortized cost [Member] | Local Currency [Member] | Companhia Sul Paulista de Energia ("CPFL Sul Paulista") [Member] | Banco IBM - Working capital [Member]
Statement Line Items [Line Items]
Total	R$ 0	7,888
Annual interest	CDI + 0.27% to 1.33 (f)
Amortization	12 semiannual installments from June 2015
Collateral	CPFL Energia guarantee
Measured at amortized cost [Member] | Local Currency [Member] | Companhia Sul Paulista de Energia ("CPFL Sul Paulista") [Member] | Banco IBM - Working capital [Member]
Statement Line Items [Line Items]
Total	R$ 0	6,784
Annual interest	CDI + 1.27%
Amortization	8 semiannual installments from February 2017
Collateral	CPFL Energia guarantee
Measured at amortized cost [Member] | Local Currency [Member] | Companhia Luz e Forca de Mococa ("CPFL Mococa") [Member] | Banco do Brasil - Working capital [Member]
Statement Line Items [Line Items]
Total	R$ 0	28,911
Annual interest	104.90% of CDI (f)
Amortization	2 annual installments from July 2017
Collateral	CPFL Energia guarantee
Measured at amortized cost [Member] | Local Currency [Member] | Companhia Luz e Forca de Mococa ("CPFL Mococa") [Member] | Banco IBM - Working capital [Member]
Statement Line Items [Line Items]
Total	R$ 0	3,481
Annual interest	100.0% of CDI
Amortization	14 semiannual installments from December 2012
Collateral	CPFL Energia guarantee
Measured at amortized cost [Member] | Local Currency [Member] | Companhia Luz e Forca de Mococa ("CPFL Mococa") [Member] | Banco IBM - Working capital [Member]
Statement Line Items [Line Items]
Total	R$ 0	13,296
Annual interest	CDI + 0.27%
Amortization	12 semiannual installments from March 2015
Collateral	CPFL Energia guarantee
Measured at amortized cost [Member] | Local Currency [Member] | "CPFL Servicos, Equipamentos, Industria e Comercio S.A. (""CPFL Servicos"") [Member]" | Banco do Brasil - Working capital [Member]
Statement Line Items [Line Items]
Total	R$ 1279	3,473
Annual interest	CDI + 0.10%
Amortization	11 semiannual installments from June 2013
Collateral	CPFL Energia guarantee
Measured at amortized cost [Member] | Local Currency [Member] | "CPFL Servicos, Equipamentos, Industria e Comercio S.A. (""CPFL Servicos"") [Member]" | Promissory notes [Member]
Statement Line Items [Line Items]
Total	R$ 46941	0
Annual interest	104.0% of CDI
Amortization	1 installment in June 2018
Collateral	CPFL Energia guarantee
Measured at amortized cost [Member] | Local Currency [Member] | CPFL Geracao de Energia S.A. ("CPFL Geracao") [Member] | Banco do Brasil - Working capital [Member]
Statement Line Items [Line Items]
Total	R$ 630309	641,316
Annual interest	109.5% of CDI
Amortization	1 installment in March 2019
Collateral	CPFL Energia guarantee
Measured at amortized cost [Member] | Local Currency [Member] | CPFL Telecom S.A ("CPFL Telecom") [Member] | Banco IBM - Working capital [Member]
Statement Line Items [Line Items]
Total	R$ 0	31,449
Annual interest	CDI + 0.18%
Amortization	12 semiannual installments from August 2014
Collateral	CPFL Energia guarantee
Measured at amortized cost [Member] | Local Currency [Member] | CPFL Transmissora Morro Agudo S.A ("CPFL Transmissao Morro Agudo") [Member] | Santander [Member]
Statement Line Items [Line Items]
Total	R$ 0	5,031
Annual interest	CDI + 1.60%
Amortization	1 installment in March 2017
Collateral	CPFL Energia guarantee
Measured at amortized cost [Member] | Local Currency [Member] | CPFL Energias Renovaveis S.A. ("CPFL Renovaveis") [Member] | HSBC [Member]
Statement Line Items [Line Items]
Total	R$ 204934	250,363
Annual interest	CDI + 0.5%
Amortization	8 annual installment from June 2013
Collateral	No collateral
Measured at amortized cost [Member] | Local Currency [Member] | CPFL Energias Renovaveis S.A. ("CPFL Renovaveis") [Member] | Safra [Member]
Statement Line Items [Line Items]
Total	R$ 194006	208,547
Annual interest	105% of CDI
Amortization	14 installments from August 2016
Collateral	No collateral
Measured at amortized cost [Member] | Local Currency [Member] | CPFL Energias Renovaveis S.A. ("CPFL Renovaveis") [Member] | Banco BBM - Bank credit note [Member]
Statement Line Items [Line Items]
Total	R$ 44095	44,171
Annual interest	CDI + 3.40%
Amortization	1 installment in March 2018
Collateral	No collateral
Measured at amortized cost [Member] | Local Currency [Member] | CPFL Energias Renovaveis S.A. ("CPFL Renovaveis") [Member] | Banco BBM - Bank credit note [Member]
Statement Line Items [Line Items]
Total	R$ 26198	0
Annual interest	CDI + 1.90%
Amortization	Bullet
Collateral	CPFL Renováveis guarantee
Measured at amortized cost [Member] | Local Currency [Member] | CPFL Energias Renovaveis S.A. ("CPFL Renovaveis") [Member] | Banco ABC - Bank credit note [Member]
Statement Line Items [Line Items]
Total	R$ 0	44,217
Annual interest	CDI + 3.80%
Amortization	1 installment in December 2017
Collateral	No collateral
Measured at amortized cost [Member] | Local Currency [Member] | CPFL Energias Renovaveis S.A. ("CPFL Renovaveis") [Member] | Deustche Bank - Bank credit note [Member]
Statement Line Items [Line Items]
Total	R$ 46966	0
Annual interest	CDI + 1.45%
Amortization	Bullet
Collateral	CPFL Renováveis promissory note
Measured at amortized cost [Member] | Local Currency [Member] | CPFL Energias Renovaveis S.A. ("CPFL Renovaveis") [Member] | Banco ABC - Promissory notes [Member]
Statement Line Items [Line Items]
Total	R$ 102006	105,883
Annual interest	CDI + 3.80%
Amortization	4 semiannual installments from February 2017
Collateral	No guarantee
Measured at amortized cost [Member] | Local Currency [Member] | CPFL Energias Renovaveis S.A. ("CPFL Renovaveis") [Member] | Banco BBM - Bank credit note [Member]
Statement Line Items [Line Items]
Total	R$ 63582	0
Annual interest	CDI + 1.39%
Amortization	1 installment in June 2018
Collateral	CPFL Renováveis guarantee
Measured at amortized cost [Member] | Local Currency [Member] | Others [Member]
Statement Line Items [Line Items]
Total	R$ 49372	66,141
Measured at amortized cost [Member] | Local Currency [Member] | Companhia Luz e Forca Santa Cruz [Member]
Statement Line Items [Line Items]
Total	R$ 0	508
Annual interest	RGR + 6%
Amortization	120 monthly installments from January 2007
Collateral	Receivables and promissory notes
Measured at amortized cost [Member] | Local Currency [Member] | Companhia Luz e Forca Santa Cruz [Member] | FINEME [Member]
Statement Line Items [Line Items]
Total	R$ 0	9,094
Annual interest	Fixed rate 6%
Amortization	111 monthly installments from April 2015
Collateral	CPFL Energia guarantee
Measured at amortized cost [Member] | Local Currency [Member] | Companhia Luz e Forca Santa Cruz [Member] | FINEME [Member]
Statement Line Items [Line Items]
Total	R$ 0	3,381
Annual interest	SELIC + 2.19%
Amortization	72 monthly installments from April 2015
Collateral	CPFL Energia guarantee
Measured at amortized cost [Member] | Local Currency [Member] | Companhia Luz e Forca Santa Cruz [Member] | FINEME [Member]
Statement Line Items [Line Items]
Total	R$ 0	6,062
Annual interest	TJLP + 2.19%
Amortization	72 monthly installments from April 2015
Collateral	CPFL Energia guarantee
Measured at amortized cost [Member] | Local Currency [Member] | Companhia Jaguari de Energia ( "CPFL Santa Cruz") [Member]
Statement Line Items [Line Items]
Total	R$ 0	9
Annual interest	RGR + 6%
Amortization	120 monthly installments from June 2007
Collateral	Receivables and promissory notes
Measured at amortized cost [Member] | Local Currency [Member] | Companhia Jaguari de Energia ( "CPFL Santa Cruz") [Member] | FINEME [Member]
Statement Line Items [Line Items]
Total	R$ 12
Annual interest	Selic + 3.63%
Amortization	36 monthly installments from December 2018
Collateral	CPFL Energia guarantee
Measured at amortized cost [Member] | Local Currency [Member] | Companhia Jaguari de Energia ( "CPFL Santa Cruz") [Member] | FINEME [Member]
Statement Line Items [Line Items]
Total	R$ 10612	2,321
Annual interest	TJLP + 2.19%
Amortization	72 monthly installments from April 2015
Collateral	CPFL Energia guarantee
Measured at amortized cost [Member] | Local Currency [Member] | Companhia Jaguari de Energia ( "CPFL Santa Cruz") [Member] | FINEME [Member]
Statement Line Items [Line Items]
Total	R$ 6204	0
Annual interest	TJLP + 3.29%
Amortization	36 monthly installments from December 2018
Collateral	CPFL Energia guarantee
Measured at amortized cost [Member] | Local Currency [Member] | Companhia Jaguari de Energia ( "CPFL Santa Cruz") [Member] | Santander - Bank credit note [Member]
Statement Line Items [Line Items]
Total	R$ 3514	0
Annual interest	TJLP + 2.99% (f)
Amortization	96 monthly installments from October 2015
Collateral	CPFL Energia guarantee
Measured at amortized cost [Member] | Local Currency [Member] | Companhia Jaguari de Energia ( "CPFL Santa Cruz") [Member] | Santander - Bank credit note [Member]
Statement Line Items [Line Items]
Total	R$ 1215	0
Annual interest	UMBNDES +1.99%
Amortization	96 monthly installments from October 2015
Collateral	CPFL Energia guarantee
Measured at amortized cost [Member] | Local Currency [Member] | Companhia Jaguari de Energia ( "CPFL Santa Cruz") [Member] | Santander - Bank credit note [Member]
Statement Line Items [Line Items]
Total	R$ 2759	1,464
Annual interest	TJLP + 3.1%
Amortization	96 monthly installments from June 2014
Collateral	CPFL Energia guarantee
Measured at amortized cost [Member] | Local Currency [Member] | Companhia Jaguari de Energia ( "CPFL Santa Cruz") [Member] | Santander - Bank credit note [Member]
Statement Line Items [Line Items]
Total	R$ 1077	572
Annual interest	UMBNDES + 2.1%
Amortization	96 monthly installments from June 2014
Collateral	CPFL Energia guarantee
Measured at amortized cost [Member] | Local Currency [Member] | Companhia Jaguari de Energia ( "CPFL Santa Cruz") [Member] | FINEME [Member]
Statement Line Items [Line Items]
Total	R$ 6424	1,287
Annual interest	SELIC + 2.19%
Amortization	72 monthly installments from April 2015
Collateral	CPFL Energia guarantee
Measured at amortized cost [Member] | Local Currency [Member] | Companhia Jaguari de Energia ( "CPFL Santa Cruz") [Member] | FINEME [Member]
Statement Line Items [Line Items]
Total	R$ 15016	2,422
Annual interest	Fixed rate 6%
Amortization	111 monthly installments from April 2015
Collateral	CPFL Energia guarantee
Measured at amortized cost [Member] | Local Currency [Member] | Companhia Jaguari de Energia ( "CPFL Santa Cruz") [Member] | FINEME [Member]
Statement Line Items [Line Items]
Total	R$ 206	0
Annual interest	TJLP + 3.39%
Amortization	96 monthly installments from May 2019
Collateral	CPFL Energia guarantee
Measured at amortized cost [Member] | Local Currency [Member] | Companhia Jaguari de Energia ( "CPFL Santa Cruz") [Member] | Banco do Brasil - Working capital [Member]
Statement Line Items [Line Items]
Total	R$ 95682	4,413
Annual interest	104.90% of CDI (f)
Amortization	2 annual installments from July 2017
Collateral	CPFL Energia guarantee
Measured at amortized cost [Member] | Local Currency [Member] | Companhia Jaguari de Energia ( "CPFL Santa Cruz") [Member] | Banco IBM - Working capital [Member]
Statement Line Items [Line Items]
Total	R$ 35895	0
Annual interest	CDI + 0.27% (f)
Amortization	12 semiannual installments from June 2015
Collateral	CPFL Energia guarantee
Measured at amortized cost [Member] | Local Currency [Member] | Companhia Jaguari de Energia ( "CPFL Santa Cruz") [Member] | Banco IBM - Working capital [Member]
Statement Line Items [Line Items]
Total	R$ 5180	0
Annual interest	CDI + 1.33% (f)
Amortization	8 semiannual installments from January 2016
Collateral	CPFL Energia guarantee
Measured at amortized cost [Member] | Local Currency [Member] | Companhia Jaguari de Energia ( "CPFL Santa Cruz") [Member] | Banco IBM - Working capital [Member]
Statement Line Items [Line Items]
Total	R$ 5652	0
Annual interest	CDI + 1.27%
Amortization	8 semiannual installments from February 2017
Collateral	CPFL Energia guarantee
Measured at amortized cost [Member] | Local Currency [Member] | Companhia Jaguari de Energia ( "CPFL Santa Cruz") [Member] | Banco IBM - Working capital [Member]
Statement Line Items [Line Items]
Total	R$ 13111	10,726
Annual interest	100.0% of CDI
Amortization	14 semiannual installments from December 2012
Collateral	CPFL Energia guarantee
Measured at amortized cost [Member] | Local Currency [Member] | Companhia Jaguari de Energia ( "CPFL Santa Cruz") [Member] | Banco IBM - Working capital [Member]
Statement Line Items [Line Items]
Total	R$ 25443	11,297
Annual interest	CDI + 0.1%
Amortization	12 semiannual installments from October 2014
Collateral	CPFL Energia guarantee
Measured at amortized cost [Member] | Local Currency [Member] | Companhia Luz e Forca Santa Cruz [Member] | Banco do Brasil - Working capital [Member]
Statement Line Items [Line Items]
Total	R$ 0	50,213
Annual interest	104.90% of CDI (f)
Amortization	2 annual installments from July 2017
Collateral	CPFL Energia guarantee
Measured at amortized cost [Member] | Local Currency [Member] | Companhia Luz e Forca Santa Cruz [Member] | Banco IBM - Working capital [Member]
Statement Line Items [Line Items]
Total	R$ 0	50,213
Annual interest	104.90% of CDI (f)
Amortization	2 annual installments from July 2017
Collateral	CPFL Energia guarantee
At fair value [member] | Foreign currency [Member]
Statement Line Items [Line Items]
Total	R$ 4858445	5,502,211
At fair value [member] | Foreign currency [Member] | Mark to market [Member]
Statement Line Items [Line Items]
Total	(58,552)	(37,415)
At fair value [member] | Foreign currency [Member] | Companhia Paulista de Forca e Luz ("CPFL Paulista") [Member] | HSBC [Member]
Statement Line Items [Line Items]
Total	R$ 0	282,808
Annual interest	US$ + Libor 3 months + 1.30% (2)
Amortization	1 installment in January 2018
Collateral	CPFL Energia guarantee and promissory notes
At fair value [member] | Foreign currency [Member] | Companhia Paulista de Forca e Luz ("CPFL Paulista") [Member] | Bank of America Merrill Lynch [Member]
Statement Line Items [Line Items]
Total	R$ 332766	327,503
Annual interest	US$+Libor 3 months+1.35% (3)
Amortization	1 installment in october 2018
Collateral	CPFL Energia guarantee and promissory notes
At fair value [member] | Foreign currency [Member] | Companhia Paulista de Forca e Luz ("CPFL Paulista") [Member] | Bank of America Merrill Lynch [Member]
Statement Line Items [Line Items]
Total	R$ 148930	146,703
Annual interest	US$+Libor 3 months+1.70% (4)
Amortization	1 installment in September 2018
Collateral	CPFL Energia guarantee and promissory notes
At fair value [member] | Foreign currency [Member] | Companhia Paulista de Forca e Luz ("CPFL Paulista") [Member] | Bank of Tokyo-Mitsubishi [Member]
Statement Line Items [Line Items]
Total	R$ 165826	163,279
Annual interest	US$ + Libor 3 months + 0.88% (3) (g)
Amortization	1 installment in February 2020
Collateral	CPFL Energia guarantee and promissory notes
At fair value [member] | Foreign currency [Member] | Companhia Paulista de Forca e Luz ("CPFL Paulista") [Member] | Bank of Tokyo-Mitsubishi [Member]
Statement Line Items [Line Items]
Total	R$ 124211	163,106
Annual interest	US$+Libor 3 months+0.80% (3) (f)
Amortization	4 semiannual installments from September 2017
Collateral	CPFL Energia guarantee and promissory notes
At fair value [member] | Foreign currency [Member] | Companhia Paulista de Forca e Luz ("CPFL Paulista") [Member] | BNP Paribas [Member]
Statement Line Items [Line Items]
Total	R$ 0	68,663
Annual interest	Euro + 1.6350% (2)
Amortization	1 installment in January 2018
Collateral	CPFL Energia guarantee and promissory notes
At fair value [member] | Foreign currency [Member] | Companhia Paulista de Forca e Luz ("CPFL Paulista") [Member] | J.P. Morgan [Member]
Statement Line Items [Line Items]
Total	R$ 0	130,522
Annual interest	US$ + 2.28% to 2.32% (3)
Amortization	1 installment in December 2017
Collateral	CPFL Energia guarantee and promissory notes
At fair value [member] | Foreign currency [Member] | Companhia Paulista de Forca e Luz ("CPFL Paulista") [Member] | J.P. Morgan [Member]
Statement Line Items [Line Items]
Total	R$ 0	115,382
Annual interest	US$ + 2.36% to 2.39% (3)
Amortization	1 installment in January 2018
Collateral	CPFL Energia guarantee and promissory notes
At fair value [member] | Foreign currency [Member] | Companhia Paulista de Forca e Luz ("CPFL Paulista") [Member] | J.P. Morgan [Member]
Statement Line Items [Line Items]
Total	R$ 83783	82,544
Annual interest	US$ + 2.74% (3)
Amortization	1 installment in January 2019
Collateral	CPFL Energia guarantee and promissory notes
At fair value [member] | Foreign currency [Member] | Companhia Paulista de Forca e Luz ("CPFL Paulista") [Member] | J.P. Morgan [Member]
Statement Line Items [Line Items]
Total	R$ 0	49,311
Annual interest	US$ + 2.2% (3)
Amortization	1 installment in February 2018
Collateral	CPFL Energia guarantee and promissory notes
At fair value [member] | Foreign currency [Member] | Companhia Paulista de Forca e Luz ("CPFL Paulista") [Member] | Bank of America Merrill Lynch [Member]
Statement Line Items [Line Items]
Total	R$ 498061	490,334
Annual interest	US$ + Libor 3 months + 1.40% (3)
Amortization	1 installment in February 2018
Collateral	CPFL Energia guarantee and promissory notes
At fair value [member] | Foreign currency [Member] | Companhia Paulista de Forca e Luz ("CPFL Paulista") [Member] | Mizuho Bank [Member]
Statement Line Items [Line Items]
Total	R$ 248189	244,484
Annual interest	US$+Libor 3 months+1.55% (3) (f)
Amortization	3 semiannual installments from March 2018
Collateral	CPFL Energia guarantee and promissory notes
At fair value [member] | Foreign currency [Member] | Companhia Paulista de Forca e Luz ("CPFL Paulista") [Member] | Syndicated transaction - Bank of America Merrill Lynch, Citibank, HSBC and EDC-Export Development Canada [Member]
Statement Line Items [Line Items]
Total	R$ 221475	218,104
Annual interest	US$ + Libor 3 months + 2.7% (4)
Amortization	5 semiannual installments from May 2019
Collateral	CPFL Energia guarantee and promissory notes
At fair value [member] | Foreign currency [Member] | Companhia Piratininga de Forca e Luz ("CPFL Piratininga") [Member] | BNP Paribas [Member]
Statement Line Items [Line Items]
Total	R$ 218814	188,822
Annual interest	Euro + 1.6350% (3)
Amortization	1 installment in January 2018
Collateral	CPFL Energia guarantee and promissory notes
At fair value [member] | Foreign currency [Member] | Companhia Piratininga de Forca e Luz ("CPFL Piratininga") [Member] | Citibank [Member]
Statement Line Items [Line Items]
Total	R$ 207743	204,486
Annual interest	US$ + Libor 3 months + 1.41% (3)
Amortization	2 annual installments from January 2019
Collateral	CPFL Energia guarantee and promissory notes
At fair value [member] | Foreign currency [Member] | Companhia Piratininga de Forca e Luz ("CPFL Piratininga") [Member] | Citibank [Member]
Statement Line Items [Line Items]
Total	R$ 165740	163,225
Annual interest	US$ + Libor 3 months + 1.35% (4)
Amortization	1 installment in March 2019
Collateral	CPFL Energia guarantee and promissory notes
At fair value [member] | Foreign currency [Member] | Companhia Piratininga de Forca e Luz ("CPFL Piratininga") [Member] | Scotiabank [Member]
Statement Line Items [Line Items]
Total	R$ 0	54,235
Annual interest	US$ + 2.08% (3)
Amortization	1 installment in August 2017
Collateral	CPFL Energia guarantee and promissory notes
At fair value [member] | Foreign currency [Member] | Companhia Piratininga de Forca e Luz ("CPFL Piratininga") [Member] | Syndicated transaction - Bank of America Merrill Lynch, Citibank, HSBC and EDC-Export Development Canada [Member]
Statement Line Items [Line Items]
Total	R$ 221475	218,104
Annual interest	US$ + Libor 3 months + 2.7% (4)
Amortization	5 semiannual installments from May 2019
Collateral	CPFL Energia guarantee and promissory notes
At fair value [member] | Foreign currency [Member] | Companhia Piratininga de Forca e Luz ("CPFL Piratininga") [Member] | Sumitomo [Member]
Statement Line Items [Line Items]
Total	R$ 166346	163,712
Annual interest	US$ + Libor 3 months + 1.35% (3) (f)
Amortization	1 installment in April 2018
Collateral	CPFL Energia guarantee and promissory notes
At fair value [member] | Foreign currency [Member] | Rio Grande Energia S.A. ("RGE") [Member] | HSBC [Member]
Statement Line Items [Line Items]
Total	R$ 0	44,496
Annual interest	US$ + Libor 3 months + 1.30% (2)
Amortization	1 installment in October 2017
Collateral	CPFL Energia guarantee and promissory notes
At fair value [member] | Foreign currency [Member] | Rio Grande Energia S.A. ("RGE") [Member] | Bank of Tokyo-Mitsubishi [Member]
Statement Line Items [Line Items]
Total	R$ 59793	58,852
Annual interest	US$ + Libor 3 months + 0.82%(3)
Amortization	1 installment in April 2018
Collateral	CPFL Energia guarantee and promissory notes
At fair value [member] | Foreign currency [Member] | Rio Grande Energia S.A. ("RGE") [Member] | Bank of Tokyo-Mitsubishi [Member]
Statement Line Items [Line Items]
Total	R$ 271893	267,740
Annual interest	US$ + Libor 3 months + 0.83%(3)
Amortization	1 installment in May 2018
Collateral	CPFL Energia guarantee and promissory notes
At fair value [member] | Foreign currency [Member] | Rio Grande Energia S.A. ("RGE") [Member] | J.P. Morgan [Member]
Statement Line Items [Line Items]
Total	R$ 0	199,826
Annual interest	US$ + 2.78% (3)
Amortization	1 installment in February 2018
Collateral	CPFL Energia guarantee and promissory notes
At fair value [member] | Foreign currency [Member] | Rio Grande Energia S.A. ("RGE") [Member] | Syndicated transaction - Bank of America Merrill Lynch, Citibank, HSBC and EDC-Export Development Canada [Member]
Statement Line Items [Line Items]
Total	R$ 221475	218,104
Annual interest	US$ + Libor 3 months + 2.7% (4)
Amortization	5 semiannual installments from May 2019
Collateral	CPFL Energia guarantee and promissory notes
At fair value [member] | Foreign currency [Member] | Rio Grande Energia S.A. ("RGE") [Member] | Bank of Tokyo-Mitsubishi [Member]
Statement Line Items [Line Items]
Total	R$ 172592	0
Annual interest	US$ + 1.9275%
Amortization	1 installment in October 2018
Collateral	CPFL Energia guarantee and promissory notes
At fair value [member] | Foreign currency [Member] | Companhia Leste Paulista de Energia ("CPFL Leste Paulista") [Member] | Scotiabank [Member]
Statement Line Items [Line Items]
Total	R$ 0	16,556
Annual interest	US$ + 3.37% (4)
Amortization	1 installment in July 2019
Collateral	CPFL Energia guarantee and promissory notes
At fair value [member] | Foreign currency [Member] | Companhia Sul Paulista de Energia ("CPFL Sul Paulista") [Member] | Scotiabank [Member]
Statement Line Items [Line Items]
Total	R$ 0	16,556
Annual interest	US$ + 3.37% (4)
Amortization	1 installment in July 2019
Collateral	CPFL Energia guarantee and promissory notes
At fair value [member] | Foreign currency [Member] | CPFL Comercializacao Brasil S.A. ("CPFL Brasil") [Member] | Scotiabank [Member]
Statement Line Items [Line Items]
Total	R$ 45161	44,501
Annual interest	US$ + 2.779% (3)
Amortization	1 installment in August 2018
Collateral	CPFL Energia guarantee and promissory notes
At fair value [member] | Foreign currency [Member] | CPFL Comercializacao Brasil S.A. ("CPFL Brasil") [Member] | Scotiabank [Member]
Statement Line Items [Line Items]
Total	R$ 11731	0
Annual interest	US$ + 2.6201% (3)
Amortization	1 installment in September 2020
Collateral	CPFL Energia guarantee and promissory notes
At fair value [member] | Foreign currency [Member] | CPFL Comercializacao Brasil S.A. ("CPFL Brasil") [Member] | Scotiabank [Member]
Statement Line Items [Line Items]
Total	R$ 253626	0
Annual interest	US$ + 2.2997% (3)
Amortization	1 installment in September 2020
Collateral	CPFL Energia guarantee and promissory notes
At fair value [member] | Foreign currency [Member] | CPFL Comercializacao Brasil S.A. ("CPFL Brasil") [Member] | Scotiabank [Member]
Statement Line Items [Line Items]
Total	R$ 159060	0
Annual interest	US$ + 2.3073%
Amortization	1 installment in October 2020
Collateral	CPFL Energia guarantee and promissory notes
At fair value [member] | Foreign currency [Member] | CPFL Geracao de Energia S.A. ("CPFL Geracao") [Member] | HSBC [Member]
Statement Line Items [Line Items]
Total	R$ 0	326,159
Annual interest	US$+Libor 3 months + 1.30% (2)
Amortization	1 installment in March 2017
Collateral	CPFL Energia guarantee and promissory notes
At fair value [member] | Foreign currency [Member] | CPFL Geracao de Energia S.A. ("CPFL Geracao") [Member] | Citibank [Member]
Statement Line Items [Line Items]
Total	R$ 397328	391,380
Annual interest	US$+Libor 3 months + 1.41% (3)
Amortization	3 annual installments from September 2018
Collateral	CPFL Energia guarantee and promissory notes
At fair value [member] | Foreign currency [Member] | CPFL Geracao de Energia S.A. ("CPFL Geracao") [Member] | Scotiabank [Member]
Statement Line Items [Line Items]
Total	R$ 119314	117,550
Annual interest	US$ + 3.3703% (4)
Amortization	1 installment in July 2019
Collateral	CPFL Energia guarantee and promissory notes
At fair value [member] | Foreign currency [Member] | CPFL Geracao de Energia S.A. ("CPFL Geracao") [Member] | Scotiabank [Member]
Statement Line Items [Line Items]
Total	R$ 165572	163,125
Annual interest	US$ + 3.1259%
Amortization	1 installment in December 2019
Collateral	CPFL Energia guarantee
At fair value [member] | Foreign currency [Member] | CPFL Geracao de Energia S.A. ("CPFL Geracao") [Member] | China Construction Bank - Bank credit note [Member]
Statement Line Items [Line Items]
Total	R$ 33120	32,624
Annual interest	US$+Libor 3 monts + 1.20% + 1.1% fee (3)
Amortization	1 installment in September 2019
Collateral	CPFL Energia guarantee and promissory notes
At fair value [member] | Foreign currency [Member] | CPFL Geracao de Energia S.A. ("CPFL Geracao") [Member] | China Construction Bank - Bank credit note [Member]
Statement Line Items [Line Items]
Total	R$ 99443	97,946
Annual interest	US$+Libor 3 months + 1.60% + 1.4% fee (4)
Amortization	1 installment in June 2019
Collateral	CPFL Energia guarantee and promissory notes
At fair value [member] | Foreign currency [Member] | Paulista Lajeado Energia S.A. ("Paulista Lajeado") [Member] | Banco Itau [Member]
Statement Line Items [Line Items]
Total	R$ 36311	35,771
Annual interest	US$ + 3.196% (4)
Amortization	1 installment in March 2018
Collateral	CPFL Energia guarantee and promissory notes
At fair value [member] | Foreign currency [Member] | Companhia Jaguari de Energia ( "CPFL Santa Cruz") [Member] | Scotiabank [Member]
Statement Line Items [Line Items]
Total	R$ 67219	16,556
Annual interest	US$ + 3.37% (4)
Amortization	1 installment in July 2019
Collateral	CPFL Energia guarantee and promissory notes
At fair value [member] | Foreign currency [Member] | Companhia Luz e Forca Santa Cruz [Member] | Scotiabank [Member]
Statement Line Items [Line Items]
Total	R$ 0	R$ 16556
Annual interest	US$ + 3.37% (4)
Amortization	1 installment in July 2019
Collateral	CPFL Energia guarantee and promissory notes

(16) DEBTS AND BORROWINGS (D115

(16) DEBTS AND BORROWINGS (Details 2) - BRL (R$) R$ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Debts And Borrowings Details 2
2,019	R$ 2737432
2,020	1,744,143
2,021	649,487
2,022	453,085
2,023	371,895
2024 to 2028	1,155,315
2029 to 2033	338,270
Subtotal	7,449,627
Mark to market	(47,177)
Total	R$ 7402450	R$ 11168394

(16) DEBTS AND BORROWINGS (D116

(16) DEBTS AND BORROWINGS (Details 3)	Dec. 31, 2017	Dec. 31, 2016
Statement Line Items [Line Items]
% of debt	100.00%	100.00%
IGP-M [Member]
Statement Line Items [Line Items]
Accumulated variation	(0.52%)	7.17%
% of debt	0.52%	0.53%
TJLP [Member]
Statement Line Items [Line Items]
Accumulated variation	7.00%	7.50%
% of debt	31.38%	31.48%
CDI [Member]
Statement Line Items [Line Items]
Accumulated variation	6.89%	13.63%
% of debt	59.49%	56.31%
Others [Member]
Statement Line Items [Line Items]
% of debt	8.60%	11.68%

(16) DEBTS AND BORROWINGS (D117

(16) DEBTS AND BORROWINGS (Details 4) R$ in Thousands	12 Months Ended
	Dec. 31, 2017BRL (R$)
Statement Line Items [Line Items]
Total approved	R$ 1824147
Released in 2017	916,697
Released net of fundraising costs	912,071
Local Currency [Member]
Statement Line Items [Line Items]
Total approved	1,254,887
Released in 2017	347,437
Released net of fundraising costs	342,811
Local Currency [Member] | Subsidiaries | FINEM VII [Member]
Statement Line Items [Line Items]
Total approved	6,556
Released in 2017	6,556
Released net of fundraising costs	R$ 6556
Interest	Quarterly
Loan purpose	Subsidiary's investment plan
Local Currency [Member] | CPFL Servicos, Equipamentos, Industria e Comercio S.A. ("CPFL Servicos") [Member] | FINEME [Member]
Statement Line Items [Line Items]
Total approved	R$ 11286
Released in 2017	11,286
Released net of fundraising costs	R$ 11286
Interest	Quarterly
Loan purpose	Purchase of machinery and equipment
Local Currency [Member] | CPFL Servicos, Equipamentos, Industria e Comercio S.A. ("CPFL Servicos") [Member] | Promissory Notes [Member]
Statement Line Items [Line Items]
Total approved	R$ 45000
Released in 2017	45,000
Released net of fundraising costs	R$ 45000
Interest	Due with principal
Loan purpose	Working capital
Local Currency [Member] | CPFL Energias Renovaveis S.A. ("CPFL Renovaveis") [Member] | FINEM XXVI [Member]
Statement Line Items [Line Items]
Total approved	R$ 764109
Released in 2017	146,730
Released net of fundraising costs	R$ 142811
Interest	Monthly
Loan purpose	Subsidiary's investment plan
Local Currency [Member] | CPFL Energias Renovaveis S.A. ("CPFL Renovaveis") [Member] | FINEM XXVII [Member]
Statement Line Items [Line Items]
Total approved	R$ 87184
Released in 2017	1,699
Released net of fundraising costs	R$ 1699
Interest	Monthly
Loan purpose	Subsidiary's investment plan
Local Currency [Member] | CPFL Energias Renovaveis S.A. ("CPFL Renovaveis") [Member] | FINEM XXVIII [Member]
Statement Line Items [Line Items]
Total approved	R$ 206000
Released in 2017	1,414
Released net of fundraising costs	R$ 1414
Interest	Monthly
Loan purpose	Subsidiary's investment plan
Local Currency [Member] | CPFL Energias Renovaveis S.A. ("CPFL Renovaveis") [Member] | Banco BBM - Bank credit note [Member]
Statement Line Items [Line Items]
Total approved	R$ 62000
Released in 2017	62,000
Released net of fundraising costs	R$ 61833
Interest	Due with principal
Loan purpose	Working capital
Local Currency [Member] | CPFL Energias Renovaveis S.A. ("CPFL Renovaveis") [Member] | Bank Credit Note
Statement Line Items [Line Items]
Total approved	R$ 11000
Released in 2017	11,000
Released net of fundraising costs	R$ 10794
Interest	Due with principal
Loan purpose	Working capital
Local Currency [Member] | CPFL Energias Renovaveis S.A. ("CPFL Renovaveis") [Member] | Bank Credit Note
Statement Line Items [Line Items]
Total approved	R$ 14000
Released in 2017	14,000
Released net of fundraising costs	R$ 13737
Interest	Due with principal
Loan purpose	Working capital
Local Currency [Member] | CPFL Energias Renovaveis S.A. ("CPFL Renovaveis") [Member] | Bank Credit Note
Statement Line Items [Line Items]
Total approved	R$ 1000
Released in 2017	1,000
Released net of fundraising costs	R$ 981
Interest	Due with principal
Loan purpose	Working capital
Local Currency [Member] | CPFL Renovaveis Figueiropolis [Member] | Bank Credit Note
Statement Line Items [Line Items]
Total approved	R$ 44000
Released in 2017	44,000
Released net of fundraising costs	R$ 44000
Interest	Due with principal
Loan purpose	Working capital
Local Currency [Member] | CPFL Renovaveis Figueiropolis [Member] | Bank Credit Note
Statement Line Items [Line Items]
Total approved	R$ 2752
Released in 2017	2,752
Released net of fundraising costs	R$ 2700
Interest	Due with principal
Loan purpose	Working capital
Foreign currency [Member]
Statement Line Items [Line Items]
Total approved	R$ 569260
Released in 2017	569,260
Released net of fundraising costs	569,260
Foreign currency [Member] | CPFL Comercializacao Brasil S.A. ("CPFL Brasil") [Member] | Scotiabank [Member]
Statement Line Items [Line Items]
Total approved	400,000
Released in 2017	400,000
Released net of fundraising costs	R$ 400000
Interest	Semiannual
Loan purpose	Working capital
Foreign currency [Member] | Rio Grande Energia S.A. ("RGE") [Member] | Bank of Tokyo-Mitsubishi [Member]
Statement Line Items [Line Items]
Total approved	R$ 169260
Released in 2017	169,260
Released net of fundraising costs	R$ 169260
Interest	Quarterly
Loan purpose	Working capital

(17) DEBENTURES (Details)

(17) DEBENTURES (Details) R$ in Thousands	12 Months Ended
	Dec. 31, 2017BRL (R$)
Statement Line Items [Line Items]
Debentures, beginning	R$ 8999945
Debentures issued	2,452,629
Repayments of principal	(2,231,451)
Interests and monetary adjustment	937,389
Exchange rates	(981,986)
Debentures, ending	9,176,526
Debentures
Statement Line Items [Line Items]
Debentures, beginning	9,067,520
Debentures issued	2,486,000
Repayments of principal	(2,231,451)
Interests and monetary adjustment	913,313
Exchange rates	(981,986)
Debentures, ending	9,253,396
Borrowing costs
Statement Line Items [Line Items]
Debentures, beginning	(67,575)
Debentures issued	(33,371)
Repayments of principal	0
Interests and monetary adjustment	24,076
Exchange rates	0
Debentures, ending	R$ 76870

(17) DEBENTURES (Details 1)

(17) DEBENTURES (Details 1) - BRL (R$) R$ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Statement Line Items [Line Items]
Noncurrent	R$ 7402450	R$ 11023685
Borrowing costs - current and noncurrent	(7,580)	(7,346)
Borrowing costs - current	(8,745)	(8,545)
Borrowing costs - noncurrent	(60,546)	(51,684)
Borrowing costs	(76,870)	(67,575)
Total interest - Current and Noncurrent	190,489	334,333
Total current	1,512,584	1,242,092
Total noncurrent	7,473,454	7,423,518
Total	R$ 9176526	8,999,945
5th Issue [Member]
Statement Line Items [Line Items]
Issue	Single series
Companhia Paulista de Forca e Luz ("CPFL Paulista") [Member]
Statement Line Items [Line Items]
Current and noncurrent interest	R$ 22890	75,992
Current	126,250	198,000
Noncurrent	1,083,681	967,000
Total	R$ 1232821	1,240,992
Companhia Paulista de Forca e Luz ("CPFL Paulista") [Member] | 6th Issue [Member]
Statement Line Items [Line Items]
Issue	Single series
Current and noncurrent interest	R$ 0	47,079
Current	0	198,000
Noncurrent	0	462,000
Total	R$ 0	707,079
Companhia Paulista de Forca e Luz ("CPFL Paulista") [Member] | 7th Issue [Member]
Statement Line Items [Line Items]
Issue	Single series
Current and noncurrent interest	R$ 17134	28,913
Current	126,250	0
Noncurrent	378,750	505,000
Total	R$ 522134	533,913
Companhia Paulista de Forca e Luz ("CPFL Paulista") [Member] | 8th Issue [Member]
Statement Line Items [Line Items]
Issue	1st series
Current and noncurrent interest	R$ 1669	0
Current	0	0
Noncurrent	215,310	0
Total	R$ 216980	0
Companhia Paulista de Forca e Luz ("CPFL Paulista") [Member] | 8th Issue [Member]
Statement Line Items [Line Items]
Issue	2nd series
Current and noncurrent interest	R$ 2925	0
Current	0	0
Noncurrent	358,224	0
Total	R$ 361149	0
Companhia Paulista de Forca e Luz ("CPFL Paulista") [Member] | 8th Issue [Member]
Statement Line Items [Line Items]
Issue	3rd series
Current and noncurrent interest	R$ 1161	0
Current	0	0
Noncurrent	131,397	0
Total	132,558	0
Companhia Piratininga de Forca e Luz ("CPFL Piratininga") [Member]
Statement Line Items [Line Items]
Current and noncurrent interest	18,766	21,301
Current	58,750	33,000
Noncurrent	527,375	312,000
Total	R$ 604891	366,301
Companhia Piratininga de Forca e Luz ("CPFL Piratininga") [Member] | 6th Issue [Member]
Statement Line Items [Line Items]
Issue	Single series
Current and noncurrent interest	R$ 1950	7,846
Current	0	33,000
Noncurrent	44,000	77,000
Total	R$ 45950	117,846
Companhia Piratininga de Forca e Luz ("CPFL Piratininga") [Member] | 7th Issue [Member]
Statement Line Items [Line Items]
Issue	Single series
Current and noncurrent interest	R$ 7973	13,455
Current	58,750	0
Noncurrent	176,250	235,000
Total	R$ 242973	248,455
Companhia Piratininga de Forca e Luz ("CPFL Piratininga") [Member] | 8th Issue [Member]
Statement Line Items [Line Items]
Issue	2nd series
Current and noncurrent interest	R$ 7669	0
Current	0	0
Noncurrent	246,000	0
Total	R$ 253669	0
Companhia Piratininga de Forca e Luz ("CPFL Piratininga") [Member] | 8th Issue [Member]
Statement Line Items [Line Items]
Issue	1st series
Current and noncurrent interest	R$ 1174	0
Current	0	0
Noncurrent	61,125	0
Total	62,299	0
RGE Sul Distribuidora de Energia S.A. ("RGE Sul") [Member]
Statement Line Items [Line Items]
Current and noncurrent interest	16,974	32,058
Current	0	0
Noncurrent	1,320,000	1,100,000
Total	R$ 1336974	1,132,058
RGE Sul Distribuidora de Energia S.A. ("RGE Sul") [Member] | 6th Issue [Member]
Statement Line Items [Line Items]
Issue	Single series
Current and noncurrent interest	R$ 312	0
Current	0	0
Noncurrent	220,000	0
Total	R$ 220312	0
RGE Sul Distribuidora de Energia S.A. ("RGE Sul") [Member] | 4th Issue [Member]
Statement Line Items [Line Items]
Issue	Single series
Current and noncurrent interest	R$ 16662	32,058
Current	0	0
Noncurrent	1,100,000	1,100,000
Total	R$ 1116662	1,132,058
Companhia Luz e Forca Santa Cruz ("CPFL Santa Cruz") [Member] | 1st Issue [Member]
Statement Line Items [Line Items]
Issue	Single series
Current and noncurrent interest	R$ 0	550
Current	0	32,500
Noncurrent	0	32,500
Total	R$ 0	65,550
CPFL Comercializacao Brasil S.A. ("CPFL Brasil") [Member] | 3rd Issue [Member]
Statement Line Items [Line Items]
Issue	Single series
Current and noncurrent interest	R$ 6059	11,657
Current	0	0
Noncurrent	400,000	400,000
Total	406,059	411,657
CPFL Geracao de Energia S.A. ("CPFL Geracao") [Member]
Statement Line Items [Line Items]
Current and noncurrent interest	29,966	56,470
Current	699,318	546,000
Noncurrent	1,081,259	1,776,798
Total	R$ 1810543	2,379,268
CPFL Geracao de Energia S.A. ("CPFL Geracao") [Member] | 6th Issue [Member]
Statement Line Items [Line Items]
Issue	Single series
Current and noncurrent interest	R$ 13671	23,228
Current	153,318	0
Noncurrent	306,682	460,000
Total	R$ 473671	483,228
CPFL Geracao de Energia S.A. ("CPFL Geracao") [Member] | 7th Issue [Member]
Statement Line Items [Line Items]
Issue	Single series
Current and noncurrent interest	R$ 8978	16,379
Current	0	0
Noncurrent	635,000	635,000
Total	R$ 643978	651,379
CPFL Geracao de Energia S.A. ("CPFL Geracao") [Member] | 5th Issue [Member]
Statement Line Items [Line Items]
Issue	Single series
Current and noncurrent interest	R$ 3366	12,969
Current	546,000	546,000
Noncurrent	0	546,000
Total	R$ 549366	1,104,969
CPFL Geracao de Energia S.A. ("CPFL Geracao") [Member] | 8th Issue [Member]
Statement Line Items [Line Items]
Issue	Single series
Current and noncurrent interest	R$ 3401	3,369
Current	0	0
Noncurrent	87,905	85,520
Total	R$ 91306	88,889
CPFL Geracao de Energia S.A. ("CPFL Geracao") [Member] | 9th Issue [Member]
Statement Line Items [Line Items]
Issue	Single series
Current and noncurrent interest	R$ 550	524
Current	0	0
Noncurrent	51,672	50,278
Total	52,221	50,802
CPFL Energias Renovaveis S.A. ("CPFL Renovaveis") [Member]
Statement Line Items [Line Items]
Current and noncurrent interest	75,141	80,183
Current	456,011	291,138
Noncurrent	1,801,612	1,746,905
Total	R$ 2332764	2,118,226
CPFL Energias Renovaveis S.A. ("CPFL Renovaveis") [Member] | 7th Issue [Member]
Statement Line Items [Line Items]
Issue	Single series
Current and noncurrent interest	R$ 6244	0
Current	0	0
Noncurrent	253,529	0
Total	R$ 259773	0
CPFL Energias Renovaveis S.A. ("CPFL Renovaveis") [Member] | 4th Issue [Member]
Statement Line Items [Line Items]
Issue	1st series
Current and noncurrent interest	R$ 4534	7,925
Current	0	0
Noncurrent	200,000	200,000
Total	R$ 204534	207,925
CPFL Energias Renovaveis S.A. ("CPFL Renovaveis") [Member] | 1st Issue [Member]
Statement Line Items [Line Items]
Issue	Single series
Current and noncurrent interest	R$ 5531	11,486
Current	60,000	30,000
Noncurrent	210,000	270,000
Total	R$ 275531	311,486
CPFL Energias Renovaveis S.A. ("CPFL Renovaveis") [Member] | 3rd Issue [Member]
Statement Line Items [Line Items]
Issue	Single series
Current and noncurrent interest	R$ 2169	4,444
Current	98,657	0
Noncurrent	197,343	296,000
Total	R$ 298169	300,444
CPFL Energias Renovaveis S.A. ("CPFL Renovaveis") [Member] | 5th Issue [Member]
Statement Line Items [Line Items]
Issue	Single series
Current and noncurrent interest	R$ 9716	0
Current	12,000	0
Noncurrent	88,000	0
Total	R$ 109716	0
CPFL Energias Renovaveis S.A. ("CPFL Renovaveis") [Member] | 1st Issue - SIIF [Member]
Statement Line Items [Line Items]
Issue	1st to 12th series
Current and noncurrent interest	R$ 762	762
Current	44,968	41,938
Noncurrent	449,678	461,314
Total	R$ 495408	504,014
CPFL Energias Renovaveis S.A. ("CPFL Renovaveis") [Member] | 1st Issue - PCH Holding 2 [Member]
Statement Line Items [Line Items]
Issue	Single series
Current and noncurrent interest	R$ 260	644
Current	8,701	8,700
Noncurrent	123,391	132,091
Total	R$ 132352	141,435
CPFL Energias Renovaveis S.A. ("CPFL Renovaveis") [Member] | 2nd Issue [Member]
Statement Line Items [Line Items]
Issue	Single series
Current and noncurrent interest	R$ 5531	11,486
Current	60,000	30,000
Noncurrent	210,000	270,000
Total	R$ 275531	311,486
CPFL Energias Renovaveis S.A. ("CPFL Renovaveis") [Member] | 1st Issue - Dobreve [Member]
Statement Line Items [Line Items]
Issue	Single series
Current and noncurrent interest	R$ 0	425
Current	0	17,500
Noncurrent	0	0
Total	R$ 0	17,925
CPFL Energias Renovaveis S.A. ("CPFL Renovaveis") [Member] | 2nd Issue - Dobreve
Statement Line Items [Line Items]
Issue	Single series
Current and noncurrent interest	R$ 39857	29,153
Current	43,329	0
Noncurrent	21,671	65,000
Total	R$ 104857	94,153
CPFL Energias Renovaveis S.A. ("CPFL Renovaveis") [Member] | 1st Issue - Pedra Cheirosa I [Member]
Statement Line Items [Line Items]
Issue	Single series
Current and noncurrent interest	R$ 1617	6,675
Current	64,653	52,200
Noncurrent	0	0
Total	R$ 66270	58,875
CPFL Energias Renovaveis S.A. ("CPFL Renovaveis") [Member] | 1st Issue - Pedra Cheirosa II [Member]
Statement Line Items [Line Items]
Issue	Single series
Current and noncurrent interest	R$ 1481	6,114
Current	59,203	47,800
Noncurrent	0	0
Total	R$ 60684	53,914
CPFL Energias Renovaveis S.A. ("CPFL Renovaveis") [Member] | 1st Issue - Boa Vista II [Member]
Statement Line Items [Line Items]
Issue	Single series
Current and noncurrent interest	R$ 0	6,395
Current	0	50,000
Noncurrent	0	0
Total	0	56,395
Rio Grande Energia S.A. ("RGE") [Member]
Statement Line Items [Line Items]
Current and noncurrent interest	25,017	45,399
Current	42,500	150,000
Noncurrent	710,073	520,000
Total	R$ 777590	715,399
Rio Grande Energia S.A. ("RGE") [Member] | 6th Issue [Member]
Statement Line Items [Line Items]
Issue	Single series
Current and noncurrent interest	R$ 8864	35,666
Current	0	150,000
Noncurrent	200,000	350,000
Total	R$ 208864	535,666
Rio Grande Energia S.A. ("RGE") [Member] | 7th Issue [Member]
Statement Line Items [Line Items]
Issue	Single series
Current and noncurrent interest	R$ 5768	9,733
Current	42,500	0
Noncurrent	127,500	170,000
Total	R$ 175768	179,733
Rio Grande Energia S.A. ("RGE") [Member] | 8th Issue [Member]
Statement Line Items [Line Items]
Issue	2nd series
Current and noncurrent interest	R$ 7812	0
Current	0	0
Noncurrent	250,000	0
Total	R$ 257812	0
Rio Grande Energia S.A. ("RGE") [Member] | 8th Issue [Member]
Statement Line Items [Line Items]
Issue	1st series
Current and noncurrent interest	R$ 2573	0
Current	0	0
Noncurrent	132,573	0
Total	R$ 135146	0
Companhia Jaguari de Energia ("CPFL Jaguari") [Member] | 1st Issue [Member]
Statement Line Items [Line Items]
Issue	Single series
Current and noncurrent interest	R$ 135	0
Current	32,500	0
Noncurrent	0	0
Total	R$ 32635	0
CPFL Energia S.A. ("CPFL Energia") [Member] | 5th Issue [Member]
Statement Line Items [Line Items]
Issue	Single series
Current and noncurrent interest	R$ 2817	18,069
Current	0	0
Noncurrent	186,000	620,000
Total	188,817	638,069
CERAN - Companhia Energetica Rio das Antas ("CERAN") [Member]
Statement Line Items [Line Items]
Current and noncurrent interest	302	0
Current	106,000	0
Noncurrent	424,000	0
Total	R$ 530302	0
CERAN - Companhia Energetica Rio das Antas ("CERAN") [Member] | 1st Issue [Member]
Statement Line Items [Line Items]
Issue	1st series
Current and noncurrent interest	R$ 181	0
Current	106,000	0
Noncurrent	212,000	0
Total	R$ 318181	0
CERAN - Companhia Energetica Rio das Antas ("CERAN") [Member] | 1st Issue - SIIF [Member]
Statement Line Items [Line Items]
Issue	2nd series
Current and noncurrent interest	R$ 121	0
Current	0	0
Noncurrent	212,000	0
Total	R$ 212121	R$ 0

(17) DEBENTURES (Details 2)

(17) DEBENTURES (Details 2) R$ in Thousands	Dec. 31, 2017BRL (R$)
Statement Line Items [Line Items]
Total borrowing Noncurrent	R$ 7473454
2019 [Member]
Statement Line Items [Line Items]
Total borrowing Noncurrent	2,549,412
2020 [Member]
Statement Line Items [Line Items]
Total borrowing Noncurrent	1,907,240
2021 [Member]
Statement Line Items [Line Items]
Total borrowing Noncurrent	1,061,702
4-5 Years [Member]
Statement Line Items [Line Items]
Total borrowing Noncurrent	975,082
More than 5 years [Member]
Statement Line Items [Line Items]
Total borrowing Noncurrent	423,730
2024 to 2028 [Member]
Statement Line Items [Line Items]
Total borrowing Noncurrent	R$ 556288

(17) DEBENTURES (Details 3)

(17) DEBENTURES (Details 3) R$ in Thousands	12 Months Ended
	Dec. 31, 2017BRL (R$)
Statement Line Items [Line Items]
Released in 2017	R$ 2486000
Released net of issuance costs	R$ 2453644
Companhia Piratininga de Forca e Luz ("CPFL Piratininga") [Member]
Statement Line Items [Line Items]
Issue Number	8th
Quantity issued	306,000
Released in 2017	R$ 306000
Released net of issuance costs	R$ 303437
Interest	Semiannual
Utilization	Subsidiary's investment plan, debt profile and working capital improvement
Rio Grande Energia S.A. ("RGE") [Member]
Statement Line Items [Line Items]
Issue Number	8th
Quantity issued	380,000
Released in 2017	R$ 380000
Released net of issuance costs	R$ 376605
Interest	Semiannual
Utilization	Subsidiary's investment plan, debt profile and working capital improvement
Companhia Paulista de Forca e Luz ("CPFL Paulista") [Member]
Statement Line Items [Line Items]
Issue Number	8th
Quantity issued	700,000
Released in 2017	R$ 700000
Released net of issuance costs	R$ 685463
Interest	Semiannual
Utilization	Subsidiary's investment plan, debt profile and working capital improvement
RGE Sul Distribuidora de Energia S.A. ("RGE Sul") [Member]
Statement Line Items [Line Items]
Issue Number	6th
Quantity issued	520,000
Released in 2017	R$ 220000
Released net of issuance costs	R$ 219887
Interest	Semiannual
Utilization	Subsidiary's investment plan, debt profile and working capital improvement
CPFL Energias Renovaveis S.A. ("CPFL Renovaveis") [Member]
Statement Line Items [Line Items]
Issue Number	5th
Quantity issued	100,000,000
Released in 2017	R$ 100000
Released net of issuance costs	R$ 97072
Interest	Semiannual
Utilization	Subsidiary's investment plan
CPFL Energias Renovaveis S.A. ("CPFL Renovaveis") [Member]
Statement Line Items [Line Items]
Issue Number	7th
Quantity issued	250,000
Released in 2017	R$ 250000
Released net of issuance costs	R$ 243472
Interest	Semiannual
Utilization	Subsidiary's investment plan
CERAN - Companhia Energetica Rio das Antas ("CERAN") [Member]
Statement Line Items [Line Items]
Issue Number	1st
Quantity issued	530,000
Released in 2017	R$ 530000
Released net of issuance costs	R$ 527708
Interest	Semiannual
Utilization	Transfer of resources to shareholders

(18) PRIVATE PENSION PLAN (Deta

(18) PRIVATE PENSION PLAN (Details) - BRL (R$) R$ in Thousands	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Statement Line Items [Line Items]
Net actuarial liability recognized in the statement of financial position	R$ 925768	R$ 1039158	R$ 458255	R$ 588048
Present Value Of Actuarial Obligations [Member]
Statement Line Items [Line Items]
Net actuarial liability recognized in the statement of financial position	6,863,541	6,668,050	5,124,182	5,175,439
Fair Value Of Plan's Assets [Member]
Statement Line Items [Line Items]
Net actuarial liability recognized in the statement of financial position	(5,959,170)	(5,628,892)	(4,674,144)	(4,587,390)
Effect Of Asset Ceiling [Member]
Statement Line Items [Line Items]
Net actuarial liability recognized in the statement of financial position	21,399	0	8,217
Companhia Paulista de Forca e Luz ("CPFL Paulista") [Member]
Statement Line Items [Line Items]
Net actuarial liability recognized in the statement of financial position	690,000	800,445	437,670	505,140
Companhia Paulista de Forca e Luz ("CPFL Paulista") [Member] | Present Value Of Actuarial Obligations [Member]
Statement Line Items [Line Items]
Net actuarial liability recognized in the statement of financial position	4,615,061	4,524,008	3,793,259	3,820,563
Companhia Paulista de Forca e Luz ("CPFL Paulista") [Member] | Fair Value Of Plan's Assets [Member]
Statement Line Items [Line Items]
Net actuarial liability recognized in the statement of financial position	(3,925,061)	(3,723,563)	(3,355,589)	(3,315,422)
Companhia Paulista de Forca e Luz ("CPFL Paulista") [Member] | Effect Of Asset Ceiling [Member]
Statement Line Items [Line Items]
Net actuarial liability recognized in the statement of financial position	0	0	0
Companhia Piratininga de Forca e Luz ("CPFL Piratininga") [Member]
Statement Line Items [Line Items]
Net actuarial liability recognized in the statement of financial position	141,724	139,958	10,308	73,383
Companhia Piratininga de Forca e Luz ("CPFL Piratininga") [Member] | Present Value Of Actuarial Obligations [Member]
Statement Line Items [Line Items]
Net actuarial liability recognized in the statement of financial position	1,247,462	1,202,596	961,329	986,972
Companhia Piratininga de Forca e Luz ("CPFL Piratininga") [Member] | Fair Value Of Plan's Assets [Member]
Statement Line Items [Line Items]
Net actuarial liability recognized in the statement of financial position	(1,105,738)	(1,062,638)	(951,021)	(913,589)
Companhia Piratininga de Forca e Luz ("CPFL Piratininga") [Member] | Effect Of Asset Ceiling [Member]
Statement Line Items [Line Items]
Net actuarial liability recognized in the statement of financial position	0	0	0
CPFL Geracao de Energia S.A. ("CPFL Geracao") [Member]
Statement Line Items [Line Items]
Net actuarial liability recognized in the statement of financial position	16,424	18,954	10,277	3,261
CPFL Geracao de Energia S.A. ("CPFL Geracao") [Member] | Present Value Of Actuarial Obligations [Member]
Statement Line Items [Line Items]
Net actuarial liability recognized in the statement of financial position	110,801	108,486	90,609	88,621
CPFL Geracao de Energia S.A. ("CPFL Geracao") [Member] | Fair Value Of Plan's Assets [Member]
Statement Line Items [Line Items]
Net actuarial liability recognized in the statement of financial position	(94,378)	(89,533)	(80,332)	(85,360)
CPFL Geracao de Energia S.A. ("CPFL Geracao") [Member] | Effect Of Asset Ceiling [Member]
Statement Line Items [Line Items]
Net actuarial liability recognized in the statement of financial position	0	0	0
Rio Grande Energia S.A. ("RGE") [Member]
Statement Line Items [Line Items]
Net actuarial liability recognized in the statement of financial position	0	4,972	0	6,264
Rio Grande Energia S.A. ("RGE") [Member] | Present Value Of Actuarial Obligations [Member]
Statement Line Items [Line Items]
Net actuarial liability recognized in the statement of financial position	365,924	352,879	278,985	279,283
Rio Grande Energia S.A. ("RGE") [Member] | Fair Value Of Plan's Assets [Member]
Statement Line Items [Line Items]
Net actuarial liability recognized in the statement of financial position	(387,322)	(347,906)	(287,202)	(273,019)
Rio Grande Energia S.A. ("RGE") [Member] | Effect Of Asset Ceiling [Member]
Statement Line Items [Line Items]
Net actuarial liability recognized in the statement of financial position	21,399	0	8,217
RGE Sul Distribuidora de Energia S.A. ("RGE Sul") [Member]
Statement Line Items [Line Items]
Net actuarial liability recognized in the statement of financial position	77,623	74,830	0	0
RGE Sul Distribuidora de Energia S.A. ("RGE Sul") [Member] | Present Value Of Actuarial Obligations [Member]
Statement Line Items [Line Items]
Net actuarial liability recognized in the statement of financial position	524,293	480,081	0	0
RGE Sul Distribuidora de Energia S.A. ("RGE Sul") [Member] | Fair Value Of Plan's Assets [Member]
Statement Line Items [Line Items]
Net actuarial liability recognized in the statement of financial position	(446,670)	(405,251)	0	R$ 0
RGE Sul Distribuidora de Energia S.A. ("RGE Sul") [Member] | Effect Of Asset Ceiling [Member]
Statement Line Items [Line Items]
Net actuarial liability recognized in the statement of financial position	0	0	0
Rio Grande Energia S.A. ("RGE") [Member] | Effect Of Asset Ceiling [Member]
Statement Line Items [Line Items]
Net actuarial liability recognized in the statement of financial position	R$ 21399	R$ 0	R$ 8217

(18) PRIVATE PENSION PLAN (D123

(18) PRIVATE PENSION PLAN (Details 1) - Present Value Of Actuarial Obligations [Member] - BRL (R$) R$ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Changes In Net Defined Benefit Liability (Asset)
Opening balance	R$ 6668050	R$ 5124182	R$ 5175439
Business combination		474,710
Gross current service cost	6,356	4,570	4,945
Interest on actuarial obligations	703,927	643,894	577,324
Participants' contributions transferred during the year	3,373	2,563	2,465
Actuarial loss: effect of changes in demographic assumptions	17,383	3,602	(858)
Actuarial loss: effect of changes in financial assumptions	(2,843)	889,770	(181,273)
Benefits paid during the year	(532,705)	(475,241)	(453,860)
End balance	6,863,541	6,668,050	5,124,182
Companhia Paulista de Forca e Luz ("CPFL Paulista") [Member]
Changes In Net Defined Benefit Liability (Asset)
Opening balance	4,524,008	3,793,259	3,820,563
Business combination		0
Gross current service cost	707	828	1,183
Interest on actuarial obligations	476,613	467,872	425,465
Participants' contributions transferred during the year	37	59	12
Actuarial loss: effect of changes in demographic assumptions	225	0	(226)
Actuarial loss: effect of changes in financial assumptions	(6,993)	619,803	(98,399)
Benefits paid during the year	(379,536)	(357,813)	(355,339)
End balance	4,615,061	4,524,008	3,793,259
Companhia Piratininga de Forca e Luz ("CPFL Piratininga") [Member]
Changes In Net Defined Benefit Liability (Asset)
Opening balance	1,202,596	961,329	986,972
Business combination		0
Gross current service cost	3,153	3,242	3,733
Interest on actuarial obligations	127,561	121,158	110,425
Participants' contributions transferred during the year	2,044	2,020	1,842
Actuarial loss: effect of changes in demographic assumptions	328	0	(614)
Actuarial loss: effect of changes in financial assumptions	(3,586)	193,652	(70,590)
Benefits paid during the year	(84,634)	(78,805)	(70,439)
End balance	1,247,462	1,202,596	961,329
CPFL Geracao de Energia S.A. ("CPFL Geracao") [Member]
Changes In Net Defined Benefit Liability (Asset)
Opening balance	108,486	90,609	88,621
Business combination		0
Gross current service cost	73	76	160
Interest on actuarial obligations	11,431	11,184	9,944
Participants' contributions transferred during the year	0	0	0
Actuarial loss: effect of changes in demographic assumptions	14	0	(12)
Actuarial loss: effect of changes in financial assumptions	(372)	14,909	(400)
Benefits paid during the year	(8,831)	(8,292)	(7,704)
End balance	110,801	108,486	90,609
Rio Grande Energia S.A. ("RGE") [Member]
Changes In Net Defined Benefit Liability (Asset)
Opening balance	352,879	278,985	279,283
Business combination		0
Gross current service cost	270	59	(131)
Interest on actuarial obligations	37,395	35,211	31,490
Participants' contributions transferred during the year	302	319	611
Actuarial loss: effect of changes in demographic assumptions	326	3,602	(6)
Actuarial loss: effect of changes in financial assumptions	(45)	57,793	(11,884)
Benefits paid during the year	(25,203)	(23,090)	(20,378)
End balance	365,924	352,879	278,985
RGE Sul Distribuidora de Energia S.A. ("RGE Sul") [Member]
Changes In Net Defined Benefit Liability (Asset)
Opening balance	480,081	0	0
Business combination		474,710
Gross current service cost	2,153	365	0
Interest on actuarial obligations	50,927	8,469	0
Participants' contributions transferred during the year	990	165	0
Actuarial loss: effect of changes in demographic assumptions	16,490	0	0
Actuarial loss: effect of changes in financial assumptions	8,153	3,613	0
Benefits paid during the year	(34,501)	(7,241)	0
End balance	R$ 524293	R$ 480081	R$ 0

(18) PRIVATE PENSION PLAN (D124

(18) PRIVATE PENSION PLAN (Details 2) - Fair Value Of Plan's Assets [Member] - BRL (R$) R$ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Statement Line Items [Line Items]
Opening balance	R$ 5628892	R$ 4674144	R$ 4587390
Business combination		(415,621)
Expected return during the year	(596,396)	(572,474)	(522,317)
Participants' contributions transferred during the year	(3,373)	(2,563)	(2,465)
Sponsors' contributions	(81,822)	(73,389)	(113,327)
Actuarial loss (gain): return on assets	(181,393)	(365,942)	97,495
Benefits paid during the year	532,705	475,241	453,860
End balance	(5,959,170)	(5,628,892)	(4,674,144)
Companhia Paulista de Forca e Luz ("CPFL Paulista") [Member]
Statement Line Items [Line Items]
Opening balance	(3,723,563)	(3,355,589)	(3,315,422)
Business combination		0
Expected return during the year	(392,819)	(404,183)	(375,527)
Participants' contributions transferred during the year	(37)	(59)	(12)
Sponsors' contributions	(50,308)	(48,263)	(81,111)
Actuarial loss (gain): return on assets	(137,870)	(273,282)	61,144
Benefits paid during the year	379,536	357,813	355,339
End balance	(3,925,061)	(3,723,563)	(3,355,589)
Companhia Piratininga de Forca e Luz ("CPFL Piratininga") [Member]
Statement Line Items [Line Items]
Opening balance	(1,062,638)	(951,021)	(913,589)
Business combination		0
Expected return during the year	(113,470)	(115,607)	(105,413)
Participants' contributions transferred during the year	(2,044)	(2,020)	(1,842)
Sponsors' contributions	(17,296)	(13,405)	(22,936)
Actuarial loss (gain): return on assets	5,076	(59,390)	22,320
Benefits paid during the year	84,634	78,805	70,439
End balance	(1,105,738)	(1,062,638)	(951,021)
CPFL Geracao de Energia S.A. ("CPFL Geracao") [Member]
Statement Line Items [Line Items]
Opening balance	(89,533)	(80,332)	(85,360)
Business combination		0
Expected return during the year	(9,437)	(9,582)	(9,691)
Participants' contributions transferred during the year	0	0	0
Sponsors' contributions	(753)	(843)	(1,687)
Actuarial loss (gain): return on assets	(3,486)	(7,068)	8,702
Benefits paid during the year	8,831	8,292	7,704
End balance	(94,378)	(89,533)	(80,332)
Rio Grande Energia S.A. ("RGE") [Member]
Statement Line Items [Line Items]
Opening balance	(347,906)	(287,202)	(273,019)
Business combination		0
Expected return during the year	(37,412)	(35,632)	(31,686)
Participants' contributions transferred during the year	(302)	(319)	(611)
Sponsors' contributions	(7,296)	(9,441)	(7,593)
Actuarial loss (gain): return on assets	(19,610)	(38,403)	5,329
Benefits paid during the year	25,203	23,090	20,378
End balance	(387,322)	(347,906)	(287,202)
RGE Sul Distribuidora de Energia S.A. ("RGE Sul") [Member]
Statement Line Items [Line Items]
Opening balance	(405,251)	0	0
Business combination		(415,621)
Expected return during the year	(43,258)	(7,470)	0
Participants' contributions transferred during the year	(990)	(165)	0
Sponsors' contributions	(6,169)	(1,437)	0
Actuarial loss (gain): return on assets	(25,503)	12,201	0
Benefits paid during the year	34,501	7,241	0
End balance	R$ 446670	R$ 405251	R$ 0

(18) PRIVATE PENSION PLAN (D125

(18) PRIVATE PENSION PLAN (Details 3) - BRL (R$) R$ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Statement Line Items [Line Items]
Opening balance	R$ 33209
Opening balance	1,039,158	R$ 458255	R$ 588048
Business combination		59,089
Expenses (income) recognized in the statement of profit or loss	113,887	76,505	60,184
Sponsors' contributions transferred during the year	(81,822)	(73,388)	(113,327)
Actuarial loss (gain): effect of changes in demographic assumptions	17,383	3,602	(858)
Actuarial loss (gain): effect of changes in financial assumptions	(2,843)	889,773	(181,273)
Actuarial loss (gain): return on assets	(181,393)	(365,942)	97,495
Effect of asset ceiling	21,399	(8,738)	7,984
End balance	60,801	33,209
End balance	925,768	1,039,158	458,255
Other contributions	15,391	13,284	16,865
Total liability	941,160	1,052,442	475,120
Current	60,801	33,209	802
Noncurrent	880,360	1,019,233	474,318
Companhia Paulista de Forca e Luz ("CPFL Paulista") [Member] | Net actuarial liability [Member]
Statement Line Items [Line Items]
Opening balance	800,445	437,670	505,140
Business combination		0
Expenses (income) recognized in the statement of profit or loss	84,501	64,514	51,121
Sponsors' contributions transferred during the year	(50,308)	(48,263)	(81,111)
Actuarial loss (gain): effect of changes in demographic assumptions	225	0	(226)
Actuarial loss (gain): effect of changes in financial assumptions	(6,993)	619,805	(98,399)
Actuarial loss (gain): return on assets	(137,870)	(273,282)	61,144
Effect of asset ceiling	0	0	0
End balance	690,000	800,445	437,670
Other contributions	14,436	12,914	16,149
Total liability	704,436	813,359	453,819
Companhia Piratininga de Forca e Luz ("CPFL Piratininga") [Member] | Net actuarial liability [Member]
Statement Line Items [Line Items]
Opening balance	139,958	10,308	73,383
Business combination		0
Expenses (income) recognized in the statement of profit or loss	17,244	8,791	8,745
Sponsors' contributions transferred during the year	(17,296)	(13,405)	(22,936)
Actuarial loss (gain): effect of changes in demographic assumptions	328	0	(614)
Actuarial loss (gain): effect of changes in financial assumptions	(3,586)	193,653	(70,590)
Actuarial loss (gain): return on assets	5,076	(59,390)	22,320
Effect of asset ceiling	0	0	0
End balance	141,724	139,958	10,308
Other contributions	637	133	526
Total liability	142,361	140,091	10,834
CPFL Geracao de Energia S.A. ("CPFL Geracao") [Member] | Net actuarial liability [Member]
Statement Line Items [Line Items]
Opening balance	18,954	10,277	3,261
Business combination		0
Expenses (income) recognized in the statement of profit or loss	2,067	1,677	413
Sponsors' contributions transferred during the year	(753)	(843)	(1,687)
Actuarial loss (gain): effect of changes in demographic assumptions	14	0	(12)
Actuarial loss (gain): effect of changes in financial assumptions	(372)	14,911	(400)
Actuarial loss (gain): return on assets	(3,486)	(7,068)	8,702
Effect of asset ceiling	0	0	0
End balance	16,424	18,954	10,277
Other contributions	158	8	63
Total liability	16,582	18,962	10,340
Rio Grande Energia S.A. ("RGE") [Member] | Net actuarial liability [Member]
Statement Line Items [Line Items]
Opening balance	4,972	0	6,264
Business combination		0
Expenses (income) recognized in the statement of profit or loss	253	158	(95)
Sponsors' contributions transferred during the year	(7,296)	(9,442)	(7,593)
Actuarial loss (gain): effect of changes in demographic assumptions	326	3,602	(6)
Actuarial loss (gain): effect of changes in financial assumptions	(45)	57,795	(11,884)
Actuarial loss (gain): return on assets	(19,610)	(38,403)	5,329
Effect of asset ceiling	21,399	(8,738)	7,984
End balance	0	4,972	0
Other contributions	160	228	127
Total liability	160	5,200	127
RGE Sul Distribuidora de Energia S.A. ("RGE Sul") [Member] | Net actuarial liability [Member]
Statement Line Items [Line Items]
Opening balance	74,830	0	0
Business combination		59,089
Expenses (income) recognized in the statement of profit or loss	9,822	1,364	0
Sponsors' contributions transferred during the year	(6,169)	(1,438)	0
Actuarial loss (gain): effect of changes in demographic assumptions	16,490	0	0
Actuarial loss (gain): effect of changes in financial assumptions	8,153	3,613	0
Actuarial loss (gain): return on assets	(25,503)	12,201	0
Effect of asset ceiling	0	0	0
End balance	77,623	74,830	0
Other contributions	0	0	0
Total liability	R$ 77623	R$ 74830	R$ 0

(18) PRIVATE PENSION PLAN (D126

(18) PRIVATE PENSION PLAN (Details 4) R$ in Thousands	12 Months Ended
	Dec. 31, 2017BRL (R$)
Statement Line Items [Line Items]
Total	R$ 131186
Companhia Paulista de Forca e Luz ("CPFL Paulista") [Member]
Statement Line Items [Line Items]
Total	86,703
Companhia Piratininga de Forca e Luz ("CPFL Piratininga") [Member]
Statement Line Items [Line Items]
Total	28,792
CPFL Geracao de Energia S.A. ("CPFL Geracao") [Member]
Statement Line Items [Line Items]
Total	1,826
Rio Grande Energia S.A. ("RGE") [Member]
Statement Line Items [Line Items]
Total	7,495
RGE Sul Distribuidora de Energia S.A. ("RGE Sul") [Member]
Statement Line Items [Line Items]
Total	R$ 6370

(18) PRIVATE PENSION PLAN (D127

(18) PRIVATE PENSION PLAN (Details 5) R$ in Thousands	Dec. 31, 2017BRL (R$)
Statement Line Items [Line Items]
2,018	R$ 528556
2,019	549,268
2,020	567,967
2,021	586,525
2022 to 2027	3,868,957
Total	6,101,273
Companhia Paulista de Forca e Luz ("CPFL Paulista") [Member]
Statement Line Items [Line Items]
2,018	374,545
2,019	387,635
2,020	399,573
2,021	410,879
2022 to 2027	2,663,707
Total	4,236,339
Companhia Piratininga de Forca e Luz ("CPFL Piratininga") [Member]
Statement Line Items [Line Items]
2,018	84,231
2,019	88,618
2,020	92,230
2,021	96,650
2022 to 2027	667,185
Total	1,028,914
CPFL Geracao de Energia S.A. ("CPFL Geracao") [Member]
Statement Line Items [Line Items]
2,018	9,010
2,019	9,252
2,020	9,572
2,021	9,829
2022 to 2027	63,274
Total	100,937
Rio Grande Energia S.A. ("RGE") [Member]
Statement Line Items [Line Items]
2,018	26,223
2,019	27,396
2,020	28,545
2,021	29,487
2022 to 2027	200,079
Total	311,730
RGE Sul Distribuidora de Energia S.A. ("RGE Sul") [Member]
Statement Line Items [Line Items]
2,018	34,547
2,019	36,367
2,020	38,047
2,021	39,680
2022 to 2027	274,712
Total	R$ 423353

(18) PRIVATE PENSION PLAN (D128

(18) PRIVATE PENSION PLAN (Details 6) - BRL (R$) R$ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Statement Line Items [Line Items]
Service cost	R$ 8243	R$ 6356	R$ 4570	R$ 4945
Interest on actuarial obligations	627,590	703,927	643,894	577,324
Expected return on plan assets	(547,959)	(596,396)	(572,476)	(522,317)
Effect of asset ceiling	2,035		520	232
Total expense (income)	89,909	113,887	76,505	60,184
Companhia Paulista de Forca e Luz ("CPFL Paulista") [Member]
Statement Line Items [Line Items]
Service cost	835	707	828	1,183
Interest on actuarial obligations	421,083	476,613	467,872	425,465
Expected return on plan assets	(359,588)	(392,819)	(404,184)	(375,527)
Effect of asset ceiling	0		0	0
Total expense (income)	62,330	84,501	64,514	51,121
Companhia Piratininga de Forca e Luz ("CPFL Piratininga") [Member]
Statement Line Items [Line Items]
Service cost	4,365	3,153	3,242	3,733
Interest on actuarial obligations	114,628	127,561	121,158	110,425
Expected return on plan assets	(102,621)	(113,470)	(115,608)	(105,413)
Effect of asset ceiling	0		0	0
Total expense (income)	16,372	17,244	8,791	8,745
CPFL Geracao de Energia S.A. ("CPFL Geracao") [Member]
Statement Line Items [Line Items]
Service cost	78	73	76	160
Interest on actuarial obligations	10,109	11,431	11,184	9,944
Expected return on plan assets	(8,634)	(9,437)	(9,582)	(9,691)
Effect of asset ceiling	0		0	0
Total expense (income)	1,553	2,067	1,677	413
Rio Grande Energia S.A. ("RGE") [Member]
Statement Line Items [Line Items]
Service cost	175	270	59	(131)
Interest on actuarial obligations	33,552	37,395	35,211	31,490
Expected return on plan assets	(35,950)	(37,412)	(35,632)	(31,686)
Effect of asset ceiling	2,035		520	232
Total expense (income)	(188)	253	158	(95)
RGE Sul Distribuidora de Energia S.A. ("RGE Sul") [Member]
Statement Line Items [Line Items]
Service cost	2,790	2,153	365	0
Interest on actuarial obligations	48,218	50,927	8,469	0
Expected return on plan assets	(41,166)	(43,258)	(7,470)	0
Effect of asset ceiling	0		0	0
Total expense (income)	R$ 9842	R$ 9822	R$ 1364	R$ 0

(18) PRIVATE PENSION PLAN (D129

(18) PRIVATE PENSION PLAN (Details 7)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Rio Grande Energia S.A. ("RGE") [Member] | Nominal Discount Rate For Actuarial Liabilities [Member]
Statement Line Items [Line Items]
Actuarial calculation assumptions consideration	9.51%	10.99%	12.67%
Rio Grande Energia S.A. ("RGE") [Member] | Nominal Return Rate On Assets [Member]
Statement Line Items [Line Items]
Actuarial calculation assumptions consideration	9.51%	10.99%	12.67%
Rio Grande Energia S.A. ("RGE") [Member] | Estimated Rate Of Nominal Salary Increase [Member]
Statement Line Items [Line Items]
Actuarial calculation assumptions consideration	6.13%	8.15%	6.79%
Rio Grande Energia S.A. ("RGE") [Member] | Estimated Rate Of Nominal Benefits Increase [Member]
Statement Line Items [Line Items]
Actuarial calculation assumptions consideration	4.00%	5.00%	5.00%
Rio Grande Energia S.A. ("RGE") [Member] | Estimated Long-Term Inflation Rate (Basis For Determining The Nominal Rates Above) [Member]
Statement Line Items [Line Items]
Actuarial calculation assumptions consideration	4.00%	5.00%	5.00%
Rio Grande Energia S.A. ("RGE") [Member] | General Biometric Mortality [Member]
Statement Line Items [Line Items]
Description of actuarial calculation assumptions consideration	BR-EMS sb v.2015	BR-EMS sb v.2015	AT-2000 (-10)
Rio Grande Energia S.A. ("RGE") [Member] | Biometric Table For The Onset Of Disability [Member]
Statement Line Items [Line Items]
Description of actuarial calculation assumptions consideration	Medium Light	Medium Light	Low Light
Rio Grande Energia S.A. ("RGE") [Member] | Expected Turnover Rate [Member]
Statement Line Items [Line Items]
Description of actuarial calculation assumptions consideration	Null	Null	ExpR_2012*
Rio Grande Energia S.A. ("RGE") [Member] | Likelihood Of Reaching Retirement Age [Member]
Statement Line Items [Line Items]
Description of actuarial calculation assumptions consideration	100% one year after when a beneficiary of the plan first becomes eligible	100% one year after when a beneficiary of the plan first becomes eligible	100% one year after when a beneficiary of the plan first becomes eligible
RGE Sul Distribuidora de Energia S.A. ("RGE Sul") [Member] | Nominal Discount Rate For Actuarial Liabilities [Member]
Statement Line Items [Line Items]
Actuarial calculation assumptions consideration	9.51%	10.99%
RGE Sul Distribuidora de Energia S.A. ("RGE Sul") [Member] | Nominal Return Rate On Assets [Member]
Statement Line Items [Line Items]
Actuarial calculation assumptions consideration	9.51%	10.99%
RGE Sul Distribuidora de Energia S.A. ("RGE Sul") [Member] | Estimated Rate Of Nominal Salary Increase [Member]
Statement Line Items [Line Items]
Actuarial calculation assumptions consideration	6.10%	7.29%
RGE Sul Distribuidora de Energia S.A. ("RGE Sul") [Member] | Estimated Rate Of Nominal Benefits Increase [Member]
Statement Line Items [Line Items]
Actuarial calculation assumptions consideration	4.00%	5.00%
RGE Sul Distribuidora de Energia S.A. ("RGE Sul") [Member] | Estimated Long-Term Inflation Rate (Basis For Determining The Nominal Rates Above) [Member]
Statement Line Items [Line Items]
Actuarial calculation assumptions consideration	4.00%	5.00%
RGE Sul Distribuidora de Energia S.A. ("RGE Sul") [Member] | General Biometric Mortality [Member]
Statement Line Items [Line Items]
Description of actuarial calculation assumptions consideration	BR-EMS sb v.2015	AT2000
RGE Sul Distribuidora de Energia S.A. ("RGE Sul") [Member] | Biometric Table For The Onset Of Disability [Member]
Statement Line Items [Line Items]
Description of actuarial calculation assumptions consideration	Medium Light	Medium Light
RGE Sul Distribuidora de Energia S.A. ("RGE Sul") [Member] | Expected Turnover Rate [Member]
Statement Line Items [Line Items]
Description of actuarial calculation assumptions consideration	Null	Null
RGE Sul Distribuidora de Energia S.A. ("RGE Sul") [Member] | Likelihood Of Reaching Retirement Age [Member]
Statement Line Items [Line Items]
Description of actuarial calculation assumptions consideration	100% one year after when a beneficiary of the plan first becomes eligible	100% one year after when a beneficiary of the plan first becomes eligible
Companhia Paulista de Forca e Luz ("CPFL Paulista"), Companhia Piratininga de Força e Luz ("CPFL Piratininga") & CPFL Geracao de Energia S.A. ("CPFL Geracao") [Member] | Nominal Discount Rate For Actuarial Liabilities [Member]
Statement Line Items [Line Items]
Actuarial calculation assumptions consideration	9.51%	10.99%	12.67%
Companhia Paulista de Forca e Luz ("CPFL Paulista"), Companhia Piratininga de Força e Luz ("CPFL Piratininga") & CPFL Geracao de Energia S.A. ("CPFL Geracao") [Member] | Nominal Return Rate On Assets [Member]
Statement Line Items [Line Items]
Actuarial calculation assumptions consideration	9.51%	10.99%	12.67%
Companhia Paulista de Forca e Luz ("CPFL Paulista"), Companhia Piratininga de Força e Luz ("CPFL Piratininga") & CPFL Geracao de Energia S.A. ("CPFL Geracao") [Member] | Estimated Rate Of Nominal Salary Increase [Member]
Statement Line Items [Line Items]
Actuarial calculation assumptions consideration	6.08%	7.00%	6.79%
Companhia Paulista de Forca e Luz ("CPFL Paulista"), Companhia Piratininga de Força e Luz ("CPFL Piratininga") & CPFL Geracao de Energia S.A. ("CPFL Geracao") [Member] | Estimated Rate Of Nominal Benefits Increase [Member]
Statement Line Items [Line Items]
Actuarial calculation assumptions consideration	4.00%	5.00%	5.00%
Companhia Paulista de Forca e Luz ("CPFL Paulista"), Companhia Piratininga de Força e Luz ("CPFL Piratininga") & CPFL Geracao de Energia S.A. ("CPFL Geracao") [Member] | Estimated Long-Term Inflation Rate (Basis For Determining The Nominal Rates Above) [Member]
Statement Line Items [Line Items]
Actuarial calculation assumptions consideration	4.00%	5.00%	5.00%
Companhia Paulista de Forca e Luz ("CPFL Paulista"), Companhia Piratininga de Força e Luz ("CPFL Piratininga") & CPFL Geracao de Energia S.A. ("CPFL Geracao") [Member] | General Biometric Mortality [Member]
Statement Line Items [Line Items]
Description of actuarial calculation assumptions consideration	AT-2000 (-10)	AT-2000 (-10)	AT-2000 (-10)
Companhia Paulista de Forca e Luz ("CPFL Paulista"), Companhia Piratininga de Força e Luz ("CPFL Piratininga") & CPFL Geracao de Energia S.A. ("CPFL Geracao") [Member] | Biometric Table For The Onset Of Disability [Member]
Statement Line Items [Line Items]
Description of actuarial calculation assumptions consideration	Low Light	Low Light	Low Light
Companhia Paulista de Forca e Luz ("CPFL Paulista"), Companhia Piratininga de Força e Luz ("CPFL Piratininga") & CPFL Geracao de Energia S.A. ("CPFL Geracao") [Member] | Expected Turnover Rate [Member]
Statement Line Items [Line Items]
Description of actuarial calculation assumptions consideration	ExpR_2012	ExpR_2012*	ExpR_2012*
Companhia Paulista de Forca e Luz ("CPFL Paulista"), Companhia Piratininga de Força e Luz ("CPFL Piratininga") & CPFL Geracao de Energia S.A. ("CPFL Geracao") [Member] | Likelihood Of Reaching Retirement Age [Member]
Statement Line Items [Line Items]
Description of actuarial calculation assumptions consideration	100% when a beneficiary of the plan first becomes eligible	100% when a beneficiary of the plan first becomes eligible	100% when a beneficiary of the plan first becomes eligible

(18) PRIVATE PENSION PLAN (D130

(18) PRIVATE PENSION PLAN (Details 8)	Dec. 31, 2017	Dec. 31, 2016
Fundacao CESP [Member] | Companhia Paulista de Forca e Luz ("CPFL Paulista") & CPFL Geracao de Energia S.A. ("CPFL Geracao") [Member]
Statement Line Items [Line Items]
Total quoted in an active market	94.00%	94.00%
Total not quoted in an active market	6.00%	6.00%
Fundacao CESP [Member] | Companhia Paulista de Forca e Luz ("CPFL Paulista") & CPFL Geracao de Energia S.A. ("CPFL Geracao") [Member] | Fixed Rate [Member]
Statement Line Items [Line Items]
Total quoted in an active market	77.00%	79.00%
Fundacao CESP [Member] | Companhia Paulista de Forca e Luz ("CPFL Paulista") & CPFL Geracao de Energia S.A. ("CPFL Geracao") [Member] | Fixed Rate [Member] | Corporate Bonds (Non Financial Institutions) [Member]
Statement Line Items [Line Items]
Total quoted in an active market	1.00%	1.00%
Fundacao CESP [Member] | Companhia Paulista de Forca e Luz ("CPFL Paulista") & CPFL Geracao de Energia S.A. ("CPFL Geracao") [Member] | Fixed Rate [Member] | Federal Governament Bonds [Member]
Statement Line Items [Line Items]
Total quoted in an active market	53.00%	60.00%
Fundacao CESP [Member] | Companhia Paulista de Forca e Luz ("CPFL Paulista") & CPFL Geracao de Energia S.A. ("CPFL Geracao") [Member] | Fixed Rate [Member] | Corporate Bonds (Financial Institutions) [Member]
Statement Line Items [Line Items]
Total quoted in an active market	4.00%	6.00%
Fundacao CESP [Member] | Companhia Paulista de Forca e Luz ("CPFL Paulista") & CPFL Geracao de Energia S.A. ("CPFL Geracao") [Member] | Fixed Rate [Member] | Multimarket Funds [Member]
Statement Line Items [Line Items]
Total quoted in an active market	2.00%	1.00%
Fundacao CESP [Member] | Companhia Paulista de Forca e Luz ("CPFL Paulista") & CPFL Geracao de Energia S.A. ("CPFL Geracao") [Member] | Fixed Rate [Member] | Other Fixed Income Investments [Member]
Statement Line Items [Line Items]
Total quoted in an active market	17.00%	12.00%
Fundacao CESP [Member] | Companhia Paulista de Forca e Luz ("CPFL Paulista") & CPFL Geracao de Energia S.A. ("CPFL Geracao") [Member] | Variable Income Investments [Member]
Statement Line Items [Line Items]
Total quoted in an active market	0.00%	8.00%
Fundacao CESP [Member] | Companhia Paulista de Forca e Luz ("CPFL Paulista") & CPFL Geracao de Energia S.A. ("CPFL Geracao") [Member] | Variable Income Investments [Member] | Investiment Funds - Shares [Member]
Statement Line Items [Line Items]
Total quoted in an active market	15.00%	6.00%
Fundacao CESP [Member] | Companhia Paulista de Forca e Luz ("CPFL Paulista") & CPFL Geracao de Energia S.A. ("CPFL Geracao") [Member] | Structured Investments [Member]
Statement Line Items [Line Items]
Total quoted in an active market	3.00%	1.00%
Fundacao CESP [Member] | Companhia Paulista de Forca e Luz ("CPFL Paulista") & CPFL Geracao de Energia S.A. ("CPFL Geracao") [Member] | Structured Investments [Member] | Equity Funds [Member]
Statement Line Items [Line Items]
Total quoted in an active market	0.00%	0.00%
Fundacao CESP [Member] | Companhia Paulista de Forca e Luz ("CPFL Paulista") & CPFL Geracao de Energia S.A. ("CPFL Geracao") [Member] | Structured Investments [Member] | Multimarket Fund [Member]
Statement Line Items [Line Items]
Total quoted in an active market	3.00%	1.00%
Fundacao CESP [Member] | Companhia Paulista de Forca e Luz ("CPFL Paulista") & CPFL Geracao de Energia S.A. ("CPFL Geracao") [Member] | Real Estate [Member]
Statement Line Items [Line Items]
Total not quoted in an active market	3.00%	3.00%
Fundacao CESP [Member] | Companhia Paulista de Forca e Luz ("CPFL Paulista") & CPFL Geracao de Energia S.A. ("CPFL Geracao") [Member] | Transactions with participants [Member]
Statement Line Items [Line Items]
Total not quoted in an active market	1.00%	1.00%
Fundacao CESP [Member] | Companhia Paulista de Forca e Luz ("CPFL Paulista") & CPFL Geracao de Energia S.A. ("CPFL Geracao") [Member] | Other investments [Member]
Statement Line Items [Line Items]
Total not quoted in an active market	1.00%	1.00%
Fundacao CESP [Member] | Companhia Paulista de Forca e Luz ("CPFL Paulista") & CPFL Geracao de Energia S.A. ("CPFL Geracao") [Member] | Other investments [Member] | Escrow deposits and others [Member]
Statement Line Items [Line Items]
Total not quoted in an active market	1.00%	1.00%
Fundacao CESP [Member] | Companhia Piratininga de Forca e Luz ("CPFL Piratininga") [Member]
Statement Line Items [Line Items]
Total quoted in an active market	97.00%	97.00%
Total not quoted in an active market	3.00%	3.00%
Fundacao CESP [Member] | Companhia Piratininga de Forca e Luz ("CPFL Piratininga") [Member] | Multimarket Fund [Member]
Statement Line Items [Line Items]
Total quoted in an active market	3.00%	1.00%
Fundacao CESP [Member] | Companhia Piratininga de Forca e Luz ("CPFL Piratininga") [Member] | Fixed Rate [Member]
Statement Line Items [Line Items]
Total quoted in an active market	80.00%	83.00%
Fundacao CESP [Member] | Companhia Piratininga de Forca e Luz ("CPFL Piratininga") [Member] | Fixed Rate [Member] | Corporate Bonds (Non Financial Institutions) [Member]
Statement Line Items [Line Items]
Total quoted in an active market	1.00%	1.00%
Fundacao CESP [Member] | Companhia Piratininga de Forca e Luz ("CPFL Piratininga") [Member] | Fixed Rate [Member] | Federal Governament Bonds [Member]
Statement Line Items [Line Items]
Total quoted in an active market	49.00%	56.00%
Fundacao CESP [Member] | Companhia Piratininga de Forca e Luz ("CPFL Piratininga") [Member] | Fixed Rate [Member] | Corporate Bonds (Financial Institutions) [Member]
Statement Line Items [Line Items]
Total quoted in an active market	7.00%	10.00%
Fundacao CESP [Member] | Companhia Piratininga de Forca e Luz ("CPFL Piratininga") [Member] | Fixed Rate [Member] | Multimarket Funds [Member]
Statement Line Items [Line Items]
Total quoted in an active market	2.00%	1.00%
Fundacao CESP [Member] | Companhia Piratininga de Forca e Luz ("CPFL Piratininga") [Member] | Fixed Rate [Member] | Other Fixed Income Investments [Member]
Statement Line Items [Line Items]
Total quoted in an active market	22.00%	15.00%
Fundacao CESP [Member] | Companhia Piratininga de Forca e Luz ("CPFL Piratininga") [Member] | Variable Income Investments [Member]
Statement Line Items [Line Items]
Total quoted in an active market	14.00%	12.00%
Fundacao CESP [Member] | Companhia Piratininga de Forca e Luz ("CPFL Piratininga") [Member] | Variable Income Investments [Member] | Investiment Funds - Shares [Member]
Statement Line Items [Line Items]
Total quoted in an active market	14.00%	7.00%
Fundacao CESP [Member] | Companhia Piratininga de Forca e Luz ("CPFL Piratininga") [Member] | Variable Income Investments [Member] | CPFL Energia's Shares [Member]
Statement Line Items [Line Items]
Total quoted in an active market	0.00%	6.00%
Fundacao CESP [Member] | Companhia Piratininga de Forca e Luz ("CPFL Piratininga") [Member] | Structured Investments [Member]
Statement Line Items [Line Items]
Total quoted in an active market	3.00%	1.00%
Fundacao CESP [Member] | Companhia Piratininga de Forca e Luz ("CPFL Piratininga") [Member] | Structured Investments [Member] | Equity Funds [Member]
Statement Line Items [Line Items]
Total quoted in an active market	0.00%	0.00%
Fundacao CESP [Member] | Companhia Piratininga de Forca e Luz ("CPFL Piratininga") [Member] | Structured Investments [Member] | Multimarket Funds [Member]
Statement Line Items [Line Items]
Total quoted in an active market	3.00%	1.00%
Fundacao CESP [Member] | Companhia Piratininga de Forca e Luz ("CPFL Piratininga") [Member] | Real Estate [Member]
Statement Line Items [Line Items]
Total not quoted in an active market	2.00%	2.00%
Fundacao CESP [Member] | Companhia Piratininga de Forca e Luz ("CPFL Piratininga") [Member] | Transactions with participants [Member]
Statement Line Items [Line Items]
Total not quoted in an active market	2.00%	2.00%
Fundacao CESP [Member] | Companhia Piratininga de Forca e Luz ("CPFL Piratininga") [Member] | Other investments [Member]
Statement Line Items [Line Items]
Total not quoted in an active market	0.00%	0.00%
Fundacao CESP [Member] | Companhia Paulista de Forca e Luz ("CPFL Paulista") & CPFL Geracao de Energia S.A. ("CPFL Geracao") [Member] | Variable Income Investments [Member]
Statement Line Items [Line Items]
Total quoted in an active market	15.00%	14.00%
Assets Managed by Fundacao CEEE [Member] | Rio Grande Energia S.A. ("RGE") [Member]
Statement Line Items [Line Items]
Total quoted in an active market	98.00%	98.00%
Total not quoted in an active market	2.00%	2.00%
Assets Managed by Fundacao CEEE [Member] | Rio Grande Energia S.A. ("RGE") [Member] | Fixed Rate [Member]
Statement Line Items [Line Items]
Total quoted in an active market	79.00%	76.00%
Assets Managed by Fundacao CEEE [Member] | Rio Grande Energia S.A. ("RGE") [Member] | Fixed Rate [Member] | Corporate Bonds (Non Financial Institutions) [Member]
Statement Line Items [Line Items]
Total quoted in an active market	3.00%	4.00%
Assets Managed by Fundacao CEEE [Member] | Rio Grande Energia S.A. ("RGE") [Member] | Fixed Rate [Member] | Federal Governament Bonds [Member]
Statement Line Items [Line Items]
Total quoted in an active market	64.00%	61.00%
Assets Managed by Fundacao CEEE [Member] | Rio Grande Energia S.A. ("RGE") [Member] | Fixed Rate [Member] | Corporate Bonds (Financial Institutions) [Member]
Statement Line Items [Line Items]
Total quoted in an active market	9.00%	8.00%
Assets Managed by Fundacao CEEE [Member] | Rio Grande Energia S.A. ("RGE") [Member] | Fixed Rate [Member] | Multimarket Funds [Member]
Statement Line Items [Line Items]
Total quoted in an active market	2.00%	3.00%
Assets Managed by Fundacao CEEE [Member] | Rio Grande Energia S.A. ("RGE") [Member] | Fixed Rate [Member] | Other Fixed Income Investments [Member]
Statement Line Items [Line Items]
Total quoted in an active market	0.00%	0.00%
Assets Managed by Fundacao CEEE [Member] | Rio Grande Energia S.A. ("RGE") [Member] | Variable Income Investments [Member]
Statement Line Items [Line Items]
Total quoted in an active market	18.00%	15.00%
Assets Managed by Fundacao CEEE [Member] | Rio Grande Energia S.A. ("RGE") [Member] | Variable Income Investments [Member] | Investiment Funds - Shares [Member]
Statement Line Items [Line Items]
Total quoted in an active market	18.00%	15.00%
Assets Managed by Fundacao CEEE [Member] | Rio Grande Energia S.A. ("RGE") [Member] | Variable Income Investments [Member] | CPFL Energia's Shares [Member]
Statement Line Items [Line Items]
Total quoted in an active market	0.00%	0.00%
Assets Managed by Fundacao CEEE [Member] | Rio Grande Energia S.A. ("RGE") [Member] | Structured Investments [Member]
Statement Line Items [Line Items]
Total quoted in an active market	1.00%	8.00%
Assets Managed by Fundacao CEEE [Member] | Rio Grande Energia S.A. ("RGE") [Member] | Structured Investments [Member] | Equity Funds [Member]
Statement Line Items [Line Items]
Total quoted in an active market	1.00%	7.00%
Assets Managed by Fundacao CEEE [Member] | Rio Grande Energia S.A. ("RGE") [Member] | Structured Investments [Member] | Real Estate Funds [Member]
Statement Line Items [Line Items]
Total quoted in an active market	1.00%	1.00%
Assets Managed by Fundacao CEEE [Member] | Rio Grande Energia S.A. ("RGE") [Member] | Structured Investments [Member] | Multimarket Fund [Member]
Statement Line Items [Line Items]
Total quoted in an active market	0.00%	0.00%
Assets Managed by Fundacao CEEE [Member] | Rio Grande Energia S.A. ("RGE") [Member] | Real Estate [Member]
Statement Line Items [Line Items]
Total not quoted in an active market	1.00%	1.00%
Assets Managed by Fundacao CEEE [Member] | Rio Grande Energia S.A. ("RGE") [Member] | Transactions with participants [Member]
Statement Line Items [Line Items]
Total not quoted in an active market	2.00%	1.00%
Assets Managed by Fundacao CEEE [Member] | Rio Grande Energia S.A. ("RGE") [Member] | Other investments [Member]
Statement Line Items [Line Items]
Total not quoted in an active market	0.00%	0.00%
Assets Managed by Fundacao CEEE [Member] | RGE Sul Distribuidora de Energia S.A. ("RGE Sul") [Member]
Statement Line Items [Line Items]
Total quoted in an active market	97.00%	98.00%
Total not quoted in an active market	3.00%	2.00%
Assets Managed by Fundacao CEEE [Member] | RGE Sul Distribuidora de Energia S.A. ("RGE Sul") [Member] | Fixed Rate [Member]
Statement Line Items [Line Items]
Total quoted in an active market	78.00%	74.00%
Assets Managed by Fundacao CEEE [Member] | RGE Sul Distribuidora de Energia S.A. ("RGE Sul") [Member] | Fixed Rate [Member] | Corporate Bonds (Non Financial Institutions) [Member]
Statement Line Items [Line Items]
Total quoted in an active market	3.00%	4.00%
Assets Managed by Fundacao CEEE [Member] | RGE Sul Distribuidora de Energia S.A. ("RGE Sul") [Member] | Fixed Rate [Member] | Federal Governament Bonds [Member]
Statement Line Items [Line Items]
Total quoted in an active market	65.00%	60.00%
Assets Managed by Fundacao CEEE [Member] | RGE Sul Distribuidora de Energia S.A. ("RGE Sul") [Member] | Fixed Rate [Member] | Corporate Bonds (Financial Institutions) [Member]
Statement Line Items [Line Items]
Total quoted in an active market	8.00%	8.00%
Assets Managed by Fundacao CEEE [Member] | RGE Sul Distribuidora de Energia S.A. ("RGE Sul") [Member] | Fixed Rate [Member] | Multimarket Funds [Member]
Statement Line Items [Line Items]
Total quoted in an active market	1.00%	3.00%
Assets Managed by Fundacao CEEE [Member] | RGE Sul Distribuidora de Energia S.A. ("RGE Sul") [Member] | Fixed Rate [Member] | Other Fixed Income Investments [Member]
Statement Line Items [Line Items]
Total quoted in an active market	0.00%	0.00%
Assets Managed by Fundacao CEEE [Member] | RGE Sul Distribuidora de Energia S.A. ("RGE Sul") [Member] | Structured Investments [Member]
Statement Line Items [Line Items]
Total quoted in an active market	1.00%	8.00%
Assets Managed by Fundacao CEEE [Member] | RGE Sul Distribuidora de Energia S.A. ("RGE Sul") [Member] | Structured Investments [Member] | Equity Funds [Member]
Statement Line Items [Line Items]
Total quoted in an active market	1.00%	7.00%
Assets Managed by Fundacao CEEE [Member] | RGE Sul Distribuidora de Energia S.A. ("RGE Sul") [Member] | Structured Investments [Member] | Real Estate Funds [Member]
Statement Line Items [Line Items]
Total quoted in an active market	1.00%	1.00%
Assets Managed by Fundacao CEEE [Member] | RGE Sul Distribuidora de Energia S.A. ("RGE Sul") [Member] | Structured Investments [Member] | Multimarket Fund [Member]
Statement Line Items [Line Items]
Total quoted in an active market	0.00%	0.00%
Assets Managed by Fundacao CEEE [Member] | RGE Sul Distribuidora de Energia S.A. ("RGE Sul") [Member] | Structured Investments [Member] | Real Estate Funds [Member]
Statement Line Items [Line Items]
Total quoted in an active market	0.00%	0.00%
Assets Managed by Fundacao CEEE [Member] | RGE Sul Distribuidora de Energia S.A. ("RGE Sul") [Member] | Real Estate [Member]
Statement Line Items [Line Items]
Total not quoted in an active market	1.00%	1.00%
Assets Managed by Fundacao CEEE [Member] | RGE Sul Distribuidora de Energia S.A. ("RGE Sul") [Member] | Transactions with participants [Member]
Statement Line Items [Line Items]
Total not quoted in an active market	2.00%	2.00%
Assets Managed by Fundacao CEEE [Member] | RGE Sul Distribuidora de Energia S.A. ("RGE Sul") [Member] | Other investments [Member]
Statement Line Items [Line Items]
Total not quoted in an active market	0.00%	0.00%
Assets Managed by Fundacao CEEE [Member] | RGE Sul Distribuidora de Energia S.A. ("RGE Sul") [Member] | Variable Income [Member] | Investiment Funds - Shares [Member]
Statement Line Items [Line Items]
Total quoted in an active market	18.00%	16.00%

(18) PRIVATE PENSION PLAN (D131

(18) PRIVATE PENSION PLAN (Details 9)	Dec. 31, 2017
Fundacao CESP [Member] | Companhia Paulista de Forca e Luz ("CPFL Paulista") & CPFL Geracao de Energia S.A. ("CPFL Geracao") [Member]
Statement Line Items [Line Items]
Total	100.00%
Fundacao CESP [Member] | Companhia Paulista de Forca e Luz ("CPFL Paulista") & CPFL Geracao de Energia S.A. ("CPFL Geracao") [Member] | Fixed Income investments [Member]
Statement Line Items [Line Items]
Total	72.80%
Fundacao CESP [Member] | Companhia Paulista de Forca e Luz ("CPFL Paulista") & CPFL Geracao de Energia S.A. ("CPFL Geracao") [Member] | Variable Income Investments [Member]
Statement Line Items [Line Items]
Total	18.67%
Fundacao CESP [Member] | Companhia Paulista de Forca e Luz ("CPFL Paulista") & CPFL Geracao de Energia S.A. ("CPFL Geracao") [Member] | Real Estate [Member]
Statement Line Items [Line Items]
Total	3.18%
Fundacao CESP [Member] | Companhia Paulista de Forca e Luz ("CPFL Paulista") & CPFL Geracao de Energia S.A. ("CPFL Geracao") [Member] | Transactions with participants [Member]
Statement Line Items [Line Items]
Total	1.32%
Fundacao CESP [Member] | Companhia Paulista de Forca e Luz ("CPFL Paulista") & CPFL Geracao de Energia S.A. ("CPFL Geracao") [Member] | Structured Investments [Member]
Statement Line Items [Line Items]
Total	2.56%
Fundacao CESP [Member] | Companhia Paulista de Forca e Luz ("CPFL Paulista") & CPFL Geracao de Energia S.A. ("CPFL Geracao") [Member] | Investments Abroad [Member]
Statement Line Items [Line Items]
Total	1.47%
Fundacao CESP [Member] | Companhia Piratininga de Forca e Luz ("CPFL Piratininga") [Member]
Statement Line Items [Line Items]
Total	100.00%
Fundacao CESP [Member] | Companhia Piratininga de Forca e Luz ("CPFL Piratininga") [Member] | Fixed Income investments [Member]
Statement Line Items [Line Items]
Total	75.41%
Fundacao CESP [Member] | Companhia Piratininga de Forca e Luz ("CPFL Piratininga") [Member] | Variable Income Investments [Member]
Statement Line Items [Line Items]
Total	17.11%
Fundacao CESP [Member] | Companhia Piratininga de Forca e Luz ("CPFL Piratininga") [Member] | Real Estate [Member]
Statement Line Items [Line Items]
Total	1.46%
Fundacao CESP [Member] | Companhia Piratininga de Forca e Luz ("CPFL Piratininga") [Member] | Transactions with participants [Member]
Statement Line Items [Line Items]
Total	1.61%
Fundacao CESP [Member] | Companhia Piratininga de Forca e Luz ("CPFL Piratininga") [Member] | Structured Investments [Member]
Statement Line Items [Line Items]
Total	2.70%
Fundacao CESP [Member] | Companhia Piratininga de Forca e Luz ("CPFL Piratininga") [Member] | Investments Abroad [Member]
Statement Line Items [Line Items]
Total	1.71%
Fundacao CEEE [Member] | Rio Grande Energia S.A. ("RGE") [Member]
Statement Line Items [Line Items]
Total	100.00%
Fundacao CEEE [Member] | Rio Grande Energia S.A. ("RGE") [Member] | Fixed Income investments [Member]
Statement Line Items [Line Items]
Total	80.50%
Fundacao CEEE [Member] | Rio Grande Energia S.A. ("RGE") [Member] | Variable Income Investments [Member]
Statement Line Items [Line Items]
Total	16.00%
Fundacao CEEE [Member] | Rio Grande Energia S.A. ("RGE") [Member] | Real Estate [Member]
Statement Line Items [Line Items]
Total	0.50%
Fundacao CEEE [Member] | Rio Grande Energia S.A. ("RGE") [Member] | Transactions with participants [Member]
Statement Line Items [Line Items]
Total	1.50%
Fundacao CEEE [Member] | Rio Grande Energia S.A. ("RGE") [Member] | Structured Investments [Member]
Statement Line Items [Line Items]
Total	1.50%
Fundacao CEEE [Member] | Rio Grande Energia S.A. ("RGE") [Member] | Investments Abroad [Member]
Statement Line Items [Line Items]
Total	0.00%
Fundacao CEEE [Member] | RGE Sul Distribuidora de Energia S.A. ("RGE Sul") [Member]
Statement Line Items [Line Items]
Total	100.00%
Fundacao CEEE [Member] | RGE Sul Distribuidora de Energia S.A. ("RGE Sul") [Member] | Fixed Income investments [Member]
Statement Line Items [Line Items]
Total	80.00%
Fundacao CEEE [Member] | RGE Sul Distribuidora de Energia S.A. ("RGE Sul") [Member] | Variable Income Investments [Member]
Statement Line Items [Line Items]
Total	16.00%
Fundacao CEEE [Member] | RGE Sul Distribuidora de Energia S.A. ("RGE Sul") [Member] | Real Estate [Member]
Statement Line Items [Line Items]
Total	0.50%
Fundacao CEEE [Member] | RGE Sul Distribuidora de Energia S.A. ("RGE Sul") [Member] | Transactions with participants [Member]
Statement Line Items [Line Items]
Total	2.00%
Fundacao CEEE [Member] | RGE Sul Distribuidora de Energia S.A. ("RGE Sul") [Member] | Structured Investments [Member]
Statement Line Items [Line Items]
Total	1.50%
Fundacao CEEE [Member] | RGE Sul Distribuidora de Energia S.A. ("RGE Sul") [Member] | Investments Abroad [Member]
Statement Line Items [Line Items]
Total	0.00%

(18) PRIVATE PENSION PLAN (D132

(18) PRIVATE PENSION PLAN (Details 10) R$ in Thousands	12 Months Ended
	Dec. 31, 2017BRL (R$)
Nominal Discount
Statement Line Items [Line Items]
Increase (Decrease)	-0.25 p.p.
Increase (decrease) in total defined benefit plan obligation	R$ 169342
Nominal Discount | Companhia Paulista de Forca e Luz ("CPFL Paulista") [Member]
Statement Line Items [Line Items]
Increase (decrease) in total defined benefit plan obligation	107,820
Nominal Discount | Companhia Piratininga de Forca e Luz ("CPFL Piratininga") [Member]
Statement Line Items [Line Items]
Increase (decrease) in total defined benefit plan obligation	34,637
Nominal Discount | CPFL Geracao de Energia S.A. ("CPFL Geracao") [Member]
Statement Line Items [Line Items]
Increase (decrease) in total defined benefit plan obligation	2,652
Nominal Discount | Rio Grande Energia S.A. ("RGE") [Member]
Statement Line Items [Line Items]
Increase (decrease) in total defined benefit plan obligation	9,433
Nominal Discount | RGE Sul Distribuidora de Energia S.A. ("RGE Sul") [Member]
Statement Line Items [Line Items]
Increase (decrease) in total defined benefit plan obligation	R$ 14800
Nominal Discount
Statement Line Items [Line Items]
Increase (Decrease)	+0.25 p.p.
Increase (decrease) in total defined benefit plan obligation	R$ 162250
Nominal Discount | Companhia Paulista de Forca e Luz ("CPFL Paulista") [Member]
Statement Line Items [Line Items]
Increase (decrease) in total defined benefit plan obligation	(103,527)
Nominal Discount | Companhia Piratininga de Forca e Luz ("CPFL Piratininga") [Member]
Statement Line Items [Line Items]
Increase (decrease) in total defined benefit plan obligation	(33,051)
Nominal Discount | CPFL Geracao de Energia S.A. ("CPFL Geracao") [Member]
Statement Line Items [Line Items]
Increase (decrease) in total defined benefit plan obligation	(2,542)
Nominal Discount | Rio Grande Energia S.A. ("RGE") [Member]
Statement Line Items [Line Items]
Increase (decrease) in total defined benefit plan obligation	(9,027)
Nominal Discount | RGE Sul Distribuidora de Energia S.A. ("RGE Sul") [Member]
Statement Line Items [Line Items]
Increase (decrease) in total defined benefit plan obligation	R$ 14103
General Biometric Mortality [Member]
Statement Line Items [Line Items]
Increase (Decrease)	+1 year
Increase (decrease) in total defined benefit plan obligation	R$ 141112
General Biometric Mortality [Member] | Companhia Paulista de Forca e Luz ("CPFL Paulista") [Member]
Statement Line Items [Line Items]
Increase (decrease) in total defined benefit plan obligation	(101,296)
General Biometric Mortality [Member] | Companhia Piratininga de Forca e Luz ("CPFL Piratininga") [Member]
Statement Line Items [Line Items]
Increase (decrease) in total defined benefit plan obligation	(21,786)
General Biometric Mortality [Member] | CPFL Geracao de Energia S.A. ("CPFL Geracao") [Member]
Statement Line Items [Line Items]
Increase (decrease) in total defined benefit plan obligation	(2,334)
General Biometric Mortality [Member] | Rio Grande Energia S.A. ("RGE") [Member]
Statement Line Items [Line Items]
Increase (decrease) in total defined benefit plan obligation	(6,452)
General Biometric Mortality [Member] | RGE Sul Distribuidora de Energia S.A. ("RGE Sul") [Member]
Statement Line Items [Line Items]
Increase (decrease) in total defined benefit plan obligation	R$ 9244
General Biometric Mortality [Member]
Statement Line Items [Line Items]
Increase (Decrease)	-1 year
Increase (decrease) in total defined benefit plan obligation	R$ 138287
General Biometric Mortality [Member] | Companhia Paulista de Forca e Luz ("CPFL Paulista") [Member]
Statement Line Items [Line Items]
Increase (decrease) in total defined benefit plan obligation	93,533
General Biometric Mortality [Member] | Companhia Piratininga de Forca e Luz ("CPFL Piratininga") [Member]
Statement Line Items [Line Items]
Increase (decrease) in total defined benefit plan obligation	21,195
General Biometric Mortality [Member] | CPFL Geracao de Energia S.A. ("CPFL Geracao") [Member]
Statement Line Items [Line Items]
Increase (decrease) in total defined benefit plan obligation	2,296
General Biometric Mortality [Member] | Rio Grande Energia S.A. ("RGE") [Member]
Statement Line Items [Line Items]
Increase (decrease) in total defined benefit plan obligation	6,273
General Biometric Mortality [Member] | RGE Sul Distribuidora de Energia S.A. ("RGE Sul") [Member]
Statement Line Items [Line Items]
Increase (decrease) in total defined benefit plan obligation	R$ 8990

(18) PRIVATE PENSION PLAN (D133

(18) PRIVATE PENSION PLAN (Details Narrative) R$ in Thousands	12 Months Ended
	Dec. 31, 2017yr	Dec. 31, 2016BRL (R$)
Statement Line Items [Line Items]
Fair value of plan assets | R$		R$ 417058
Companhia Paulista de Forca e Luz ("CPFL Paulista") [Member] | Weighted Average [Member]
Statement Line Items [Line Items]
Average duration of the defined benefit obligation	9.2
Companhia Piratininga de Forca e Luz ("CPFL Piratininga") [Member] | Weighted Average [Member]
Statement Line Items [Line Items]
Average duration of the defined benefit obligation	10.8
CPFL Geracao de Energia S.A. ("CPFL Geracao") [Member] | Weighted Average [Member]
Statement Line Items [Line Items]
Average duration of the defined benefit obligation	9.4
Rio Grande Energia S.A. ("RGE") [Member] | Weighted Average [Member]
Statement Line Items [Line Items]
Average duration of the defined benefit obligation	10.1
RGE Sul Distribuidora de Energia S.A. ("RGE Sul") [Member] | Weighted Average [Member]
Statement Line Items [Line Items]
Average duration of the defined benefit obligation	11

(19) REGULATORY CHARGES (Detail

(19) REGULATORY CHARGES (Details) - BRL (R$) R$ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Regulatory Charges Details
Fee for the use of water resources	R$ 1256	R$ 1385
Global reversal reserve - RGR	17,545	17,469
ANEEL inspection fee - TFSEE	2,061	2,044
Energy development account - CDE	262,213	309,117
Tariff flags and others	298,525	36,064
Total	R$ 581600	R$ 366078

(19) REGULATORY CHARGES (Det135

(19) REGULATORY CHARGES (Details Narrative) - BRL (R$) R$ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Statement Line Items [Line Items]
Energy development account - CDE	R$ 262213	R$ 309117
Matching of accounts receivable and payable	238,510
Year 2017 [Member]
Statement Line Items [Line Items]
Energy development account - CDE	138,135
Year 2016 [Member]
Statement Line Items [Line Items]
Energy development account - CDE		164,681
January 2013 to January 2014 [Member]
Statement Line Items [Line Items]
Energy development account - CDE	47,429	44,622
February to December 2014 [Member]
Statement Line Items [Line Items]
Energy development account - CDE	R$ 76649	R$ 99814

(20) TAXES, FEES AND CONTRIB136

(20) TAXES, FEES AND CONTRIBUTIONS (Details) - BRL (R$) R$ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Current
IRPJ (corporate income tax)	R$ 59026	R$ 42793
CSLL (social contribution on net income)	22,430	14,434
Income tax and social contribution	81,457	57,227
ICMS (State VAT)	403,492	416,096
PIS (tax on revenue)	32,486	28,759
COFINS (tax on revenue)	141,757	126,939
Other	51,111	52,522
Other taxes	628,846	624,316
Total	710,303	681,544
Noncurrent
PIS (tax on revenue)	R$ 18839	R$ 26814

(21) PROVISION FOR TAX, CIVI137

(21) PROVISION FOR TAX, CIVIL AND LABOR RISKS AND ESCROW DEPOSITS (Details) - BRL (R$) R$ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Statement Line Items [Line Items]
Provision for tax, civil and labor risks	R$ 961134	R$ 833276
Escrow Deposits	839,990	550,072
Tax [Member]
Statement Line Items [Line Items]
Provision for tax, civil and labor risks	347,291	288,389
Escrow Deposits	619,077	325,481
Others [Member]
Statement Line Items [Line Items]
Provision for tax, civil and labor risks	98,196	85,971
Escrow Deposits	1,620	229
Labor Various [Member] | Labor [Member]
Statement Line Items [Line Items]
Provision for tax, civil and labor risks	224,258	222,001
Escrow Deposits	122,194	110,147
Civil Various [Member] | Civil [Member]
Statement Line Items [Line Items]
Provision for tax, civil and labor risks	291,388	236,915
Escrow Deposits	97,100	114,214
Tax FINSOCIAL [Member] | Tax [Member]
Statement Line Items [Line Items]
Provision for tax, civil and labor risks	33,473	32,372
Escrow Deposits	95,903	90,951
Tax Income Tax [Member] | Tax [Member]
Statement Line Items [Line Items]
Provision for tax, civil and labor risks	150,020	142,790
Escrow Deposits	382,884	150,439
Tax Others [Member] | Tax [Member]
Statement Line Items [Line Items]
Provision for tax, civil and labor risks	163,798	113,227
Escrow Deposits	R$ 140289	R$ 84091

(21) PROVISION FOR TAX, CIVI138

(21) PROVISION FOR TAX, CIVIL AND LABOR RISKS AND ESCROW DEPOSITS (Details 1) R$ in Thousands	12 Months Ended
	Dec. 31, 2017BRL (R$)
Statement Line Items [Line Items]
Beginning balance of provisions	R$ 833276
Additions	250,302
Reversals	(86,822)
Payments	(206,788)
Monetary Restatements	70,954
Business combination	100,212
Ending balance of provisions	961,134
Labor [Member]
Statement Line Items [Line Items]
Beginning balance of provisions	222,001
Additions	98,267
Reversals	(39,052)
Payments	(78,056)
Monetary Restatements	26,915
Business combination	(5,817)
Ending balance of provisions	224,258
Civil [Member]
Statement Line Items [Line Items]
Beginning balance of provisions	236,915
Additions	108,147
Reversals	(38,074)
Payments	(115,162)
Monetary Restatements	18,298
Business combination	81,264
Ending balance of provisions	291,388
Tax [Member]
Statement Line Items [Line Items]
Beginning balance of provisions	288,389
Additions	34,005
Reversals	(7,188)
Payments	(1,055)
Monetary Restatements	20,351
Business combination	12,791
Ending balance of provisions	347,291
Others [Member]
Statement Line Items [Line Items]
Beginning balance of provisions	85,971
Additions	9,883
Reversals	(2,508)
Payments	(12,514)
Monetary Restatements	5,391
Business combination	11,974
Ending balance of provisions	R$ 98196

(21) PROVISION FOR TAX, CIVI139

(21) PROVISION FOR TAX, CIVIL AND LABOR RISKS AND ESCROW DEPOSITS (Details 2) - BRL (R$) R$ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Statement Line Items [Line Items]
Total possible losses	R$ 7106055	R$ 6377188
Labor [Member]
Statement Line Items [Line Items]
Total possible losses	R$ 686538	668,005
Main reasons for claims	Work accidents, risk premium for dangerousness at workplace and overtime
Civil [Member]
Statement Line Items [Line Items]
Total possible losses	R$ 1178671	1,004,279
Main reasons for claims	Personal injury, environmental impacts and overfed tariffs
Tax [Member]
Statement Line Items [Line Items]
Total possible losses	R$ 5100151	4,611,077
Main reasons for claims	ICMS, FINSOCIAL, PIS, COFINS, Social Contributions and Income tax
Others [Member]
Statement Line Items [Line Items]
Total possible losses	R$ 140695	R$ 93827
Main reasons for claims	Technical, commercial and economic-financial supervisions

(21) PROVISION FOR TAX, CIVI140

(21) PROVISION FOR TAX, CIVIL AND LABOR RISKS AND ESCROW DEPOSITS (Details Narrative) - BRL (R$) R$ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2017	Aug. 31, 2017
Companhia Paulista de Forca e Luz ("CPFL Paulista") [Member]
Statement Line Items [Line Items]
Deductibility for income tax expense recognized	R$ 1224660
CPFL Energias Renovaveis S.A. ("CPFL Renovaveis") [Member]
Statement Line Items [Line Items]
Tax infringement notices			R$ 285537
CPFL Jaguari de Geracao de Energia Ltda ("CPFL Jaguari Geracao") [Member]
Statement Line Items [Line Items]
Tax infringement notices		R$ 316372
Tax [Member] | Companhia Piratininga de Forca e Luz ("CPFL Piratininga") [Member]
Statement Line Items [Line Items]
Provisions for tax risks	R$ 139957	R$ 147100

(22) OTHER PAYABLES (Details)

(22) OTHER PAYABLES (Details) - BRL (R$) R$ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Other Payables Details
Consumers and concessionaires, current	R$ 93068	R$ 73864
Consumers and concessionaires, noncurrent	44,473	44,711
Energy efficiency program - PEE, current	186,621	257,622
Energy efficiency program - PEE, noncurrent	110,931	58,798
Research & Development - P&D, current	103,308	75,655
Research & Development - P&D, noncurrent	68,780	55,272
EPE/FNDCT/PROCEL (*), current	15,612	12,928
EPE/FNDCT/PROCEL (*), noncurrent	0	0
Reversion fund, current	0	0
Reversion fund, noncurrent	17,750	17,750
Advances, current	300,214	163,054
Advances, noncurrent	22,255	8,029
Tariff discounts - CDE, current	25,040	8,891
Tariff discounts - CDE, noncurrent	0	0
Provision for socio environmental costs and asset retirement, current	16,360	13,703
Provision for socio environmental costs and asset retirement, noncurrent	107,814	61,828
Payroll, current	20,747	16,951
Payroll, noncurrent	0	0
Profit sharing, current	80,518	56,215
Profit sharing, noncurrent	16,273	11,400
Collections agreement, current	72,483	69,793
Collections agreement, noncurrent	0	0
Guarantees, current	0	0
Guarantees, noncurrent	5,959	44,140
Business combination, current	6,927	9,492
Business combination, noncurrent	0	0
Others, current	40,408	49,454
Others, noncurrent	32,654	7,364
Total, current	961,306	807,623
Total, noncurrent	R$ 426890	R$ 309292

(23) EQUITY (Details)

(23) EQUITY (Details) - shares	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Statement Line Items [Line Items]
Number common shares	1,017,914,746	1,017,914,746
Percentage of interest	100.00%	100.00%
State Grid Brazil Power Participações S.A. [Member]
Statement Line Items [Line Items]
Number common shares	730,435,698	0
Percentage of interest	71.76%	0.00%
ESC Energia S.A. [Member]
Statement Line Items [Line Items]
Number common shares	234,086,204	234,086,204
Percentage of interest	23.00%	23.00%
Camargo Correa S.A. [Member]
Statement Line Items [Line Items]
Number common shares	27,435	5,897,311
Percentage of interest	0.00%	0.58%
Caixa de Previdencia dos Funcionarios do Banco do Brasil - Previ [Member]
Statement Line Items [Line Items]
Number common shares	0	299,787,559
Percentage of interest	0.00%	29.45%
Fundacao CESP [Member]
Statement Line Items [Line Items]
Number common shares	0	51,048,952
Percentage of interest	0.00%	5.02%
Fundacao Sistel de Seguridade Social [Member]
Statement Line Items [Line Items]
Number common shares	0	37,070,292
Percentage of interest	0.00%	3.64%
Energia Sao Paulo FIA [Member]
Statement Line Items [Line Items]
Number common shares	0	35,145,643
Percentage of interest	0.00%	3.45%
Fundacao Petrobras de Seguridade Social - Petros [Member]
Statement Line Items [Line Items]
Number common shares	0	28,056,260
Percentage of interest	2.76%	0.00%
Bonaire Participacoes S.A. [Member]
Statement Line Items [Line Items]
Number common shares	0	1,249,386
Percentage of interest	0.00%	0.12%
Fundacao Sabesp de Seguridade Social - Sabesprev [Member]
Statement Line Items [Line Items]
Number common shares	0	696,561
Percentage of interest	0.00%	0.07%
BNDES Participacoes S.A. [Member]
Statement Line Items [Line Items]
Number common shares	0	68,592,097
Percentage of interest	0.00%	6.74%
Antares Holdings Ltda. [Member]
Statement Line Items [Line Items]
Number common shares	0	16,967,165
Percentage of interest	0.00%	1.67%
Brumado Holdings Ltda. [Member]
Statement Line Items [Line Items]
Number common shares	0	36,497,075
Percentage of interest	0.00%	3.59%
Executive Officers [Member]
Statement Line Items [Line Items]
Number common shares	189	34,250
Percentage of interest	0.00%	0.00%
Other shareholders [Member]
Statement Line Items [Line Items]
Number common shares	53,365,220	202,785,991
Percentage of interest	5.24%	19.92%

(23) EQUITY (Details 1)

(23) EQUITY (Details 1) R$ in Thousands	12 Months Ended
	Dec. 31, 2017BRL (R$)
Equity Details 1
Net income for the year - parent company	R$ 1179750
Realization of comprehensive income	25,873
Prescribed dividends	3,768
Net income considered for allocation	1,209,391
Legal reserve	(58,988)
Statutory reserve - concession financial asset	(123,673)
Statutory reserve - working capital improvement	(746,541)
Mandatory dividend	(280,191)
Additional dividend	R$ 0

(23) EQUITY (Details 2)

(23) EQUITY (Details 2) - BRL (R$) R$ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Statement Line Items [Line Items]
Equity attributable to noncontrolling interests, beginning balance	R$ 2402648	R$ 2455942	R$ 2453794
Equity attributable to noncontrolling interests	63,292	(21,828)	10,337
Dividends	(118,220)	(30,827)	(8,147)
Other movements	(113)	(641)	(41)
Capital increase (reduction)	(122,791)
Equity attributable to noncontrolling interests, ending balance.	2,224,816	2,402,648	2,455,942
CERAN [Member]
Statement Line Items [Line Items]
Equity attributable to noncontrolling interests, beginning balance	R$ 263719	R$ 234271	R$ 214454
Equity interests and voting capital (Beginning)	35.00%	35.00%	35.00%
Equity attributable to noncontrolling interests	R$ 37949	R$ 38621	R$ 25990
Dividends	(92,832)	(9,172)	(6,173)
Other movements	0	0	0
Capital increase (reduction)	(122,806)
Equity attributable to noncontrolling interests, ending balance.	R$ 86031	R$ 263719	R$ 234271
Equity attributable to noncontrolling interests, ending balance	35.00%	35.00%	35.00%
CPFL Renovaveis [Member]
Statement Line Items [Line Items]
Equity attributable to noncontrolling interests, beginning balance	R$ 2060963	R$ 2148490	R$ 2171911
Equity interests and voting capital (Beginning)	48.40%	48.39%	48.39%
Equity attributable to noncontrolling interests	R$ 13720	R$ 65311	R$ 20611
Dividends	(16,619)	(22,751)	(2,818)
Other movements	0	535	7
Capital increase (reduction)	15
Equity attributable to noncontrolling interests, ending balance.	R$ 2058079	R$ 2060963	R$ 2148490
Equity attributable to noncontrolling interests, ending balance	48.40%	48.40%	48.39%
Paulista Lajeado [Member]
Statement Line Items [Line Items]
Equity attributable to noncontrolling interests, beginning balance	R$ 77966	R$ 73182	R$ 67427
Equity interests and voting capital (Beginning)	40.07%	40.07%	40.07%
Equity attributable to noncontrolling interests	R$ 11623	R$ 4862	R$ 4958
Dividends	(8,769)	1,096	843
Other movements	(113)	(1,176)	(48)
Capital increase (reduction)	0
Equity attributable to noncontrolling interests, ending balance.	R$ 80707	R$ 77966	R$ 73182
Equity attributable to noncontrolling interests, ending balance	40.07%	40.07%	40.07%

(23) EQUITY (Details 3)

(23) EQUITY (Details 3) - BRL (R$) R$ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Statement Line Items [Line Items]
Current assets	R$ 9581212	R$ 11379187
Cash and cash equivalents	3,249,642	6,164,997	R$ 5682802	R$ 4357455
Noncurrent assets	31,701,701	30,791,805
Current liabilities	11,378,688	9,018,492
Noncurrent liabilities	18,717,881	22,779,832
Equity	11,186,344	10,372,668	10,130,140	9,397,329
Attributable to owners of the Company	8,961,528	7,970,021
Net operating revenue	26,744,905	19,112,089	20,599,212
Depreciation and amortization	(1,529,052)	(1,291,166)	(1,279,903)
Attributable to owners of the Company	1,179,750	900,885	864,940
CERAN [Member]
Statement Line Items [Line Items]
Current assets	110,566	288,538
Cash and cash equivalents	37,043	238,241
Noncurrent assets	848,445	927,948
Current liabilities	198,624	121,646
Borrowings and debentures	105,844	60,162
Other financial liabilities	12,360	20,800
Noncurrent liabilities	514,583	341,356
Borrowings and debentures	422,166	254,732
Other financial liabilities	83,766	86,624
Equity	245,804	753,484
Attributable to owners of the Company	245,804	753,484
Attributable to noncontrolling interests	0	0	0	R$ 0
Net operating revenue	321,743	301,179	281,374
Operational costs and expenses	(103,671)	(67,242)	(71,033)
Depreciation and amortization	(45,212)	(48,082)	(45,986)
Interest income	30,489	28,232	17,532
Interest expense	(40,202)	(36,485)	(40,801)
Income tax expense	(54,099)	(55,596)	(38,381)
Profit (loss) for the year	108,427	110,345	74,256
Attributable to owners of the Company	108,427	110,345	74,256
CPFL Renovaveis [Member]
Statement Line Items [Line Items]
Current assets	1,623,645	1,398,797
Cash and cash equivalents	950,215	908,982
Noncurrent assets	11,232,357	11,066,086
Current liabilities	1,957,000	1,313,466
Borrowings and debentures	1,259,105	889,981
Other financial liabilities	7,258	85,523
Noncurrent liabilities	6,760,025	6,713,610
Borrowings and debentures	5,251,704	5,517,890
Other financial liabilities	0	633
Equity	4,138,977	4,437,807
Attributable to owners of the Company	4,032,448	4,324,589
Attributable to noncontrolling interests	106,529	113,218	0
Net operating revenue	1,959,084	1,646,589	1,499,356
Operational costs and expenses	(737,472)	(653,459)	(498,005)
Depreciation and amortization	(617,017)	(553,169)	(540,578)
Interest income	126,041	112,389	115,639
Interest expense	(648,571)	(591,626)	(551,407)
Income tax expense	(74,125)	(46,311)	(49,221)
Profit (loss) for the year	196,445	143,706	47,717
Attributable to owners of the Company	11,484	(151,900)	(54,447)
Attributable to noncontrolling interests	8,162	8,195	5,760
Paulista Lajeado [Member]
Statement Line Items [Line Items]
Current assets	48,037	39,429
Cash and cash equivalents	24,086	24,688
Noncurrent assets	120,677	122,991
Current liabilities	42,525	9,586
Borrowings and debentures	36,453	324
Other financial liabilities	264	1,056
Noncurrent liabilities	258	36,404
Borrowings and debentures	0	36,167
Other financial liabilities	0	0
Equity	125,931	116,431
Attributable to owners of the Company	125,931	116,431
Attributable to noncontrolling interests	0	0	0
Net operating revenue	38,278	30,820	31,225
Operational costs and expenses	(10,566)	(27,404)	(22,400)
Depreciation and amortization	(4)	(3)	(7)
Interest income	2,089	2,728	2,243
Interest expense	(4,050)	(1,383)	(1,206)
Income tax expense	(2,911)	(1,137)	(2,843)
Profit (loss) for the year	29,006	12,134	12,374
Attributable to owners of the Company	R$ 29006	R$ 12134	R$ 12374

(24) EARNINGS PER SHARE (Detail

(24) EARNINGS PER SHARE (Details) - BRL (R$) R$ / shares in Units, R$ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Numerator
Profit attributable to the owners of the Company	R$ 1179750	R$ 900885	R$ 864940
Denominator
Weighted average number of shares held by shareholders	1,017,914,746	1,017,914,746	1,017,914,746
Earnings per share - basic	R$ 1.16	R$ 0.89	R$ 0.85
Numerator
Profit attributable to the owners of the Company	R$ 1179750	R$ 900885	R$ 864940
Dilutive effect of convertible debentures of subsidiary CPFL Renovaveis	(11,966)	(16,153)	(19,811)
Profit attributable to controlling shareholders	R$ 1167784	R$ 884731	R$ 845129
Denominator
Weighted average number of shares held by shareholders	1,017,914,746	1,017,914,746	1,017,914,746
Earnings per share - diluted	R$ 1.15	R$ 0.87	R$ 0.83

(25) NET OPERATING REVENUE (Det

(25) NET OPERATING REVENUE (Details) R$ in Thousands	12 Months Ended
	Dec. 31, 2017BRL (R$)ConsumerGW	Dec. 31, 2016BRL (R$)ConsumerGW	Dec. 31, 2015BRL (R$)ConsumerGW
Statement Line Items [Line Items]
Billed	R$ 25786572	R$ 23998155	R$ 23424701
Billed consumers | Consumer	9,375,922	9,224,499	7,750,860
Billed In GWh | GW	53,342	46,546	45,049
Own comsuption in GWh | GW	34	32	33
Unbilled (net)	R$ 89575	R$ 50441	R$ 202729
Transfer or revenue related to the network availability for Captive Consumers	(9,273,840)	(9,055,188)	(8,118,085)
Electricity sales to final consumers	R$ 16423157	R$ 14993408	R$ 15509345
Electricity sales to final consumers In GWh | GW	53,376	46,578	45,082
Furnas Centrais Eletricas S.A.	R$ 565592	R$ 533855	R$ 485846
Furnas Centrais Eletricas S.A. In GWh | GW	3,026	3,034	3,026
Other concessionaires and licensees	R$ 3240571	R$ 2371091	R$ 2223339
Other concessionaires and licensees | GW	16,337	12,252	10,656
Transfer or revenue related to the network availability for Captive Consumers	R$ 56528	R$ 50598	R$ 46982
Spot market energy	R$ 2340463	R$ 641744	R$ 875002
Spot market energy In GWh | GW	8,194	6,173	4,289
Electricity sales to wholesalers	R$ 6090098	R$ 3496092	R$ 3537205
Electricity sales to wholesalers In GWh | GW	27,557	21,459	17,971
Revenue due to Network Usage Charge - TUSD - Captive Consumers	R$ 9330368	R$ 9105786	R$ 8165066
Revenue due to Network Usage Charge - TUSD - Free Consumers	2,137,566	2,057,327	1,898,138
Adjustment of revenues from excess demand and excess reactive power	(21,861)	(17,908)	(16,884)
Revenue from construction of concession infrastructure	2,073,423	1,354,023	1,046,669
Sector financial asset and liability (Note 8)	1,900,837	(2,094,695)	2,506,524
Concession financial asset - Adjustment of expected cash flow (note 11)	204,443	186,148	393,343
Energy development account - CDE - Low-income, tariff discounts - judicial injunctions and other tariff discounts	1,419,128	1,266,027	895,538
Other revenues and income	496,340	438,377	367,356
Other operating revenues	17,540,244	12,295,084	15,255,750
Total gross operating revenue	40,053,498	30,784,584	34,002,212
Deductions from operating revenue	(13,308,593)	(11,672,495)	(13,703,089)
Net operating revenue	R$ 26744905	R$ 19112089	R$ 20599212
Residential [Member]
Statement Line Items [Line Items]
Number of consumers | Consumer	8,330,237	8,174,700	6,906,580
Sale of electricity In GWh | GW	19,122	16,473	16,164
Revenue from electric energy operations	R$ 11663084	R$ 10367415	R$ 9833419
Industrial [Member]
Statement Line Items [Line Items]
Number of consumers | Consumer	59,825	61,112	55,586
Sale of electricity In GWh | GW	14,661	13,022	12,748
Revenue from electric energy operations	R$ 5095840	R$ 5281978	R$ 5526967
Commercial [Member]
Statement Line Items [Line Items]
Number of consumers | Consumer	545,095	551,171	473,333
Sale of electricity In GWh | GW	10,220	9,720	9,259
Revenue from electric energy operations	R$ 5498867	R$ 5431926	R$ 5266432
Rural [Member]
Statement Line Items [Line Items]
Number of consumers | Consumer	359,106	355,586	245,238
Sale of electricity In GWh | GW	3,762	2,474	2,152
Revenue from electric energy operations	R$ 1173569	R$ 816684	R$ 750209
Public Administration [Member]
Statement Line Items [Line Items]
Number of consumers | Consumer	60,639	61,208	51,359
Sale of electricity In GWh | GW	1,456	1,271	1,278
Revenue from electric energy operations	R$ 787967	R$ 690389	R$ 702152
Public Lighting [Member]
Statement Line Items [Line Items]
Number of consumers | Consumer	11,230	11,073	10,362
Sale of electricity In GWh | GW	1,964	1,746	1,649
Revenue from electric energy operations	R$ 654950	R$ 580229	R$ 545597
Public Services [Member]
Statement Line Items [Line Items]
Number of consumers | Consumer	9,790	9,649	8,402
Sale of electricity In GWh | GW	2,157	1,840	1,797
Revenue from electric energy operations	R$ 978286	R$ 901662	R$ 879288
Adjustment of revenues from excess demand and excess reactive power	(65,991)	(72,129)	(79,362)
ICMS [Member]
Statement Line Items [Line Items]
Deductions from operating revenue	(5,455,718)	(4,935,068)	(4,686,039)
PIS [Member]
Statement Line Items [Line Items]
Deductions from operating revenue	(603,050)	(471,836)	(529,322)
COFINS [Member]
Statement Line Items [Line Items]
Deductions from operating revenue	(2,777,626)	(2,172,777)	(2,438,208)
ISS [Member]
Statement Line Items [Line Items]
Deductions from operating revenue	(15,929)	(10,568)	(8,204)
Global Reversal Reserve - RGR [Member]
Statement Line Items [Line Items]
Deductions from operating revenue	(2,952)	(4,230)	(2,529)
Energy Development Account - CDE [Member]
Statement Line Items [Line Items]
Deductions from operating revenue	(3,185,693)	(3,360,613)	(3,970,013)
Research & Development & Energy Efficiency Programs [Member]
Statement Line Items [Line Items]
Deductions from operating revenue	(191,997)	(138,583)	(158,516)
PROINFA [Member]
Statement Line Items [Line Items]
Deductions from operating revenue	(166,743)	(121,800)	(90,910)
Tariff Flags & Others [Member]
Statement Line Items [Line Items]
Deductions from operating revenue	(878,460)	(430,077)	(1,796,226)
IPI [Member]
Statement Line Items [Line Items]
Deductions from operating revenue	(102)	(195)	(100)
FUST & FUNTEL [Member]
Statement Line Items [Line Items]
Deductions from operating revenue	(19)	(38)	(24)
Others [Member]
Statement Line Items [Line Items]
Deductions from operating revenue	R$ 30304	R$ 26709	R$ 22997

(25) NET OPERATING REVENUE (148

(25) NET OPERATING REVENUE (Details 1)	12 Months Ended
	Dec. 31, 2015
Companhia Paulista de Forca e Luz ("CPFL Paulista") [Member]
Effect perceived by consumers
Group A	40.05%
Group B	27.27%
Total	32.28%
Companhia Piratininga de Forca e Luz ("CPFL Piratininga") [Member]
Effect perceived by consumers
Group A	40.49%
Group B	21.47%
Total	29.78%
Rio Grande Energia S.A. ("RGE") [Member]
Effect perceived by consumers
Group A	43.36%
Group B	33.04%
Total	37.16%
RGE Sul Distribuidora de Energia S.A. ("RGE Sul") [Member]
Effect perceived by consumers
Group A	43.76%
Group B	36.23%
Total	39.45%
Companhia Luz e Forca Santa Cruz [Member]
Effect perceived by consumers
Group A	10.53%
Group B	9.78%
Total	10.04%
Companhia Leste Paulista de Energia ("CPFL Leste Paulista") [Member]
Effect perceived by consumers
Group A	24.74%
Group B	17.55%
Total	19.54%
Companhia Jaguari de Energia ( "CPFL Santa Cruz") [Member]
Effect perceived by consumers
Group A	25.01%
Group B	18.79%
Total	23.01%
Companhia Sul Paulista de Energia ("CPFL Sul Paulista") [Member]
Effect perceived by consumers
Group A	37.67%
Group B	13.86%
Total	21.95%
Companhia Luz e Forca de Mococa ("CPFL Mococa") [Member]
Effect perceived by consumers
Group A	23.84%
Group B	13.97%
Total	16.59%

(25) NET OPERATING REVENUE (149

(25) NET OPERATING REVENUE (Details 2)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Companhia Paulista de Forca e Luz ("CPFL Paulista") [Member]
Statement Line Items [Line Items]
Month	April
RTA / RTP	(0.80%)	9.89%	41.45%
Effect perceived by consumers	(10.50%)	7.55%	4.67%
Companhia Piratininga de Forca e Luz ("CPFL Piratininga") [Member]
Statement Line Items [Line Items]
Month	October
RTA / RTP	7.69%	(12.54%)	56.29%
Effect perceived by consumers	17.28%	(24.21%)	21.11%
Rio Grande Energia S.A. ("RGE") [Member]
Statement Line Items [Line Items]
Month	June
RTA / RTP	3.57%	(1.48%)	33.48%
Effect perceived by consumers	5.00%	(7.51%)	(3.76%)
RGE Sul Distribuidora de Energia S.A. ("RGE Sul") [Member]
Statement Line Items [Line Items]
Month	April
RTA / RTP	(0.20%)	3.94%	52.45%
Effect perceived by consumers	(6.43%)	(0.34%)	5.46%
Companhia Leste Paulista de Energia ("CPFL Leste Paulista") [Member]
Statement Line Items [Line Items]
Month	March
RTA / RTP	0.77%	21.04%	20.80%
Effect perceived by consumers	(4.15%)	13.32%	24.89%
Companhia Sul Paulista de Energia ("CPFL Sul Paulista") [Member]
Statement Line Items [Line Items]
Month	March
RTA / RTP	1.63%	24.35%	24.88%
Effect perceived by consumers	(10.73%)	12.82%	28.38%
Companhia Luz e Forca de Mococa ("CPFL Mococa") [Member]
Statement Line Items [Line Items]
Month	March
RTA / RTP	1.65%	16.57%	23.34%
Effect perceived by consumers	(3.28%)	9.02%	29.28%
Companhia Luz e Forca Santa Cruz [Member]
Statement Line Items [Line Items]
Month	March
RTA / RTP	(1.23%)	22.51%	34.68%
Effect perceived by consumers	(8.42%)	7.15%	27.96%
Companhia Jaguari de Energia ( "CPFL Santa Cruz") [Member]
Statement Line Items [Line Items]
Month	March
RTA / RTP	2.05%	29.46%	38.46%
Effect perceived by consumers	(2.56%)	13.25%	45.70%

(26) COST OF ELECTRIC ENERGY (D

(26) COST OF ELECTRIC ENERGY (Details) R$ in Thousands	12 Months Ended
	Dec. 31, 2017BRL (R$)GW	Dec. 31, 2016BRL (R$)GW	Dec. 31, 2015BRL (R$)GW
Statement Line Items [Line Items]
Electricity purchased for resale In GWh | GW	77,974	63,975	58,607
Electricity purchased for resale	R$ 15617498	R$ 9849252	R$ 11846779
Electricity network usage charge
Basic network charges	1,541,629	834,341	847,342
Transmission from Itaipu	159,896	53,248	51,236
Connection charges	122,536	84,927	56,312
Charges for use of the distribution system	39,451	38,699	40,332
System service charges - ESS, net of transfers froM CONER	(452,978)	362,735	555,851
Reserve energy charges - EER	(303)	106,925	54,762
PIS and COFINS credit	(126,213)	(129,883)	(140,868)
Subtotal	1,284,080	1,350,990	1,464,967
Total	R$ 16901518	R$ 11200242	R$ 13311747
Itaipu Binacional [Member]
Statement Line Items [Line Items]
Electricity purchased for resale In GWh | GW	11,779	10,497	10,261
Electricity purchased for resale	R$ 2350858	R$ 2025780	R$ 2869481
Spot market / PROINFA [Member]
Statement Line Items [Line Items]
Electricity purchased for resale In GWh | GW	3,595	2,253	4,004
Electricity purchased for resale	R$ 560153	R$ 269792	R$ 981009
Energy purchased through auction [Member]
Statement Line Items [Line Items]
Electricity purchased for resale In GWh | GW	62,600	51,225	44,342
Electricity purchased for resale	R$ 14269265	R$ 8541677	R$ 9192868
PIS and COFINS credit [Member]
Statement Line Items [Line Items]
Electricity purchased for resale In GWh | GW	0	0	0
Electricity purchased for resale	R$ 1562779	R$ 987997	R$ 1196579

(27) OPERATING COSTS AND EXP151

(27) OPERATING COSTS AND EXPENSES (Details) - BRL (R$) R$ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Statement Line Items [Line Items]
Cost of operation	R$ 2771145	R$ 2248795	R$ 1907107
Cost of services rendered to third parties	2,074,611	1,357,032	1,049,101
Selling expenses	590,232	547,251	464,583
General and administrative expenses	947,072	849,416	863,499
Other Operating Expense	438,494	386,746	357,653
Operating cost and expense	6,821,554	5,389,240	4,642,033
Personnel operating expense [Member]
Statement Line Items [Line Items]
Cost of operation	882,150	686,434	596,021
Cost of services rendered to third parties	2	1	28
Selling expenses	170,859	134,864	123,812
General and administrative expenses	324,147	272,618	219,348
Other Operating Expense	0	0	0
Operating cost and expense	1,377,158	1,093,918	939,209
Private pension plans operating expense [Member]
Statement Line Items [Line Items]
Cost of operation	113,887	76,505	60,184
Cost of services rendered to third parties	0	0	0
Selling expenses	0	0	0
General and administrative expenses	0	0	0
Other Operating Expense	0	0	0
Operating cost and expense	113,887	76,505	60,184
Materials operating expense [Member]
Statement Line Items [Line Items]
Cost of operation	222,650	164,168	123,853
Cost of services rendered to third parties	1,061	1,412	1,008
Selling expenses	2,444	8,191	5,249
General and administrative expenses	23,818	16,175	9,825
Other Operating Expense	0	0	0
Operating cost and expense	249,973	189,946	139,935
Third party services operating expense [Member]
Statement Line Items [Line Items]
Cost of operation	249,689	271,623	187,080
Cost of services rendered to third parties	1,856	3,416	2,777
Selling expenses	186,525	146,957	128,022
General and administrative expenses	289,082	229,199	241,115
Other Operating Expense	0	0	0
Operating cost and expense	727,152	651,195	558,994
Depreciation and amortization operating expense [Member]
Statement Line Items [Line Items]
Cost of operation	1,143,795	937,506	870,427
Cost of services rendered to third parties	0	0	0
Selling expenses	5,403	3,602	21,826
General and administrative expenses	93,639	94,949	84,985
Other Operating Expense	0	0	0
Operating cost and expense	1,242,837	1,036,056	977,238
Cost of infrastructure construction operating expense [Member]
Statement Line Items [Line Items]
Cost of operation	0	0	0
Cost of services rendered to third parties	2,071,698	1,352,214	1,045,301
Selling expenses	0	0	0
General and administrative expenses	0	0	0
Other Operating Expense	0	0	0
Operating cost and expense	2,071,698	1,352,214	1,045,301
Others collection fees operating expense [Member]
Statement Line Items [Line Items]
Cost of operation	157,113	112,560	69,633
Cost of services rendered to third parties	(7)	(11)	(12)
Selling expenses	225,000	253,638	185,673
General and administrative expenses	218,247	236,476	308,226
Other Operating Expense	438,494	386,746	357,653
Operating cost and expense	1,038,847	989,408	921,173
Collection fees operating expense [Member]
Statement Line Items [Line Items]
Cost of operation	11,710	0	0
Cost of services rendered to third parties	0	0	0
Selling expenses	68,757	65,562	56,990
General and administrative expenses	0	0	0
Other Operating Expense	0	0	0
Operating cost and expense	80,467	65,562	56,990
Allowance for doubtful accounts operating expense [Member]
Statement Line Items [Line Items]
Cost of operation	0	0	0
Cost of services rendered to third parties	0	0	0
Selling expenses	155,097	176,349	126,879
General and administrative expenses	0	0	0
Other Operating Expense	0	0	0
Operating cost and expense	155,097	176,349	126,879
Leases and rentals operating expense [Member]
Statement Line Items [Line Items]
Cost of operation	52,734	42,163	31,687
Cost of services rendered to third parties	0	0	0
Selling expenses	(148)	113	(4)
General and administrative expenses	19,740	17,109	16,874
Other Operating Expense	0	0	0
Operating cost and expense	72,326	59,385	48,558
Publicity and advertising operating expense [Member]
Statement Line Items [Line Items]
Cost of operation	202	150	339
Cost of services rendered to third parties	0	0	0
Selling expenses	1	29	34
General and administrative expenses	17,412	11,659	9,565
Other Operating Expense	0	0	0
Operating cost and expense	17,615	11,838	9,938
Legal, judicial and indemnities operating expense [Member]
Statement Line Items [Line Items]
Cost of operation	0	0	10
Cost of services rendered to third parties	0	0	0
Selling expenses	0	0	0
General and administrative expenses	188,355	181,888	263,453
Other Operating Expense	0	0	0
Operating cost and expense	188,355	181,888	263,463
Donations, contributions and subsidies operating expense [Member]
Statement Line Items [Line Items]
Cost of operation	88	54	0
Cost of services rendered to third parties	0	0	0
Selling expenses	2	9	16
General and administrative expenses	3,924	2,425	3,418
Other Operating Expense	0	0	0
Operating cost and expense	4,014	2,488	3,434
Gain (loss) on disposal, retirement and other noncurrent assets operating expense [Member]
Statement Line Items [Line Items]
Cost of operation	0	0	0
Cost of services rendered to third parties	0	0	0
Selling expenses	0	0	0
General and administrative expenses	0	0	0
Other Operating Expense	132,195	83,575	16,309
Operating cost and expense	132,195	83,575	16,309
Amortization of concession intangible asset operating expense [Member]
Statement Line Items [Line Items]
Cost of operation	0	0	0
Cost of services rendered to third parties	0	0	0
Selling expenses	0	0	0
General and administrative expenses	0	0	0
Other Operating Expense	286,215	255,110	302,665
Operating cost and expense	286,215	255,110	302,665
Amortization of premium paid - GSF operating expense [Member]
Statement Line Items [Line Items]
Cost of operation	9,594	9,594	13,768
Cost of services rendered to third parties	0	0	0
Selling expenses	0	0	0
General and administrative expenses	0	0	0
Other Operating Expense	0	0	0
Operating cost and expense	9,594	9,594	13,768
Financial compensation for use of water resources operating expense [Member]
Statement Line Items [Line Items]
Cost of operation	8,656	12,233	0
Cost of services rendered to third parties	0	0	0
Selling expenses	0	0	0
General and administrative expenses	0	0	0
Other Operating Expense	0	0	38,956
Operating cost and expense	8,656	12,233	38,956
Impairment operating expense [Member]
Statement Line Items [Line Items]
Cost of operation	0	0	23,829
Cost of services rendered to third parties	0	0	(12)
Selling expenses	0	0	1,759
General and administrative expenses	0	0	14,916
Other Operating Expense	20,437	48,291	(277)
Operating cost and expense	20,437	48,291	40,214
Others operating expense [Member]
Statement Line Items [Line Items]
Cost of operation	74,130	48,367	1,907,197
Cost of services rendered to third parties	(7)	(11)	1,049,101
Selling expenses	1,291	11,575	464,583
General and administrative expenses	(11,184)	23,395	863,499
Other Operating Expense	(353)	(231)	357,653
Operating cost and expense	R$ 63877	R$ 83095	R$ 4642033

(28) FINANCE INCOME (COSTS) (De

(28) FINANCE INCOME (COSTS) (Details) - BRL (R$) R$ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Finance Income
Income from financial investments	R$ 457255	R$ 667429	R$ 472745
Late payment interest and fines	265,455	246,045	215,923
Adjustment for inflation of tax credits	19,623	32,371	57,580
Adjustment for inflation of escrow deposits	49,502	35,228	84,683
Adjustment for inflation and exchange rate changes	60,999	147,849	121,609
Discount on purchase of ICMS credit	16,386	16,198	13,027
Adjustments to the sector financial asset (note 8)		32,747	162,786
PIS and COFINS on other finance income	(48,322)	(63,223)	(52,849)
PIS and COFINS on interest on capital	(27,798)	(2,324)	(6,941)
Other	87,214	88,182	74,685
Total	880,314	1,200,503	1,143,247
Finance expenses
Interest on debts	(1,661,060)	(1,811,263)	(1,725,252)
Adjustment for inflation and exchange rate changes	(540,053)	(703,128)	(686,575)
Capitalized interest	50,543	68,082	45,568
Adjustments to the sector financial liability (note 8)	(82,333)	(25,079)	(1,573)
Use of public asset	(8,048)	(14,950)	(16,028)
Others	(126,917)	(167,638)	(167,250)
Total	(2,367,868)	(2,653,978)	(2,551,110)
Finance expenses, net	R$ 1487554	R$ 1453474	R$ 1407863

(28) FINANCE INCOME (COSTS) 153

(28) FINANCE INCOME (COSTS) (Details Narrative) - BRL (R$) R$ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Finance Income Costs Details Narrative
Average rate interests capitalized	8.54%	10.90%	10.25%
Gain (loss) on derivative instruments	R$ 235852	R$ 1399988	R$ 1514439

(29) SEGMENT INFORMATION (Detai

(29) SEGMENT INFORMATION (Details) - BRL (R$) R$ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Statement Line Items [Line Items]
Net operating revenue	R$ 26744905	R$ 19112089	R$ 20599212
Intersegment revenues	0	0	0
Cost of electric energy	(16,901,518)	(11,200,242)	(13,311,747)
Operating costs and expenses	(5,292,502)	(4,098,074)	(3,362,126)
Depreciation and amortization	(1,529,052)	(1,291,166)	(1,279,903)
Income from electric energy service	3,021,834	2,522,608	2,645,434
Equity	312,390	311,414	216,885
Finance income	880,314	1,200,503	1,143,247
Finance expenses	(2,367,868)	(2,653,978)	(2,551,110)
Profit (loss) before taxes	1,846,670	1,380,547	1,454,454
Income tax and social contribution	(603,629)	(501,490)	(579,177)
Profit for the year	1,243,042	879,057	875,277
Attributable to controlling shareholders	1,177,206	900,885	864,942
Attributable to noncontrolling interests	65,836	(21,828)	10,337
Total assets	41,282,912	42,170,992	40,532,471
Purchases of PP&E and intangible assets	2,570,433	2,237,949	1,427,796
Distribution [Member]
Statement Line Items [Line Items]
Net operating revenue	21,068,435	15,017,166	16,945,222
Intersegment revenues	8,182	22,526	22,318
Cost of electric energy	(14,146,703)	(9,747,720)	(11,934,217)
Operating costs and expenses	(4,695,480)	(3,447,081)	(2,889,495)
Depreciation and amortization	(763,739)	(591,334)	(587,059)
Income from electric energy service	1,470,695	1,253,557	1,556,770
Equity	0	0	0
Finance income	597,133	781,365	740,628
Finance expenses	(1,163,600)	(1,331,973)	(1,256,801)
Profit (loss) before taxes	904,228	702,950	1,040,597
Income tax and social contribution	(299,510)	(295,748)	(414,633)
Profit for the year	604,717	407,202	625,965
Profit attributable to controlling shareholders	604,717	407,202	625,965
Attributable to noncontrolling interests	0	0	0
Total assets	22,278,452	22,887,781	22,138,086
Purchases of PP&E and intangible assets	1,882,502	1,200,621	868,495
Generation (conventional source) [Member]
Statement Line Items [Line Items]
Net operating revenue	741,842	593,775	572,553
Intersegment revenues	448,421	409,338	411,038
Cost of electric energy	(147,379)	(98,521)	(223,495)
Operating costs and expenses	(156,340)	(106,364)	(85,388)
Depreciation and amortization	(123,129)	(126,596)	(131,969)
Income from electric energy service	763,415	671,631	542,738
Equity	312,390	311,414	216,885
Finance income	102,713	182,574	110,018
Finance expenses	(431,289)	(562,196)	(549,286)
Profit (loss) before taxes	747,229	603,424	320,354
Income tax and social contribution	(95,688)	(98,530)	(37,570)
Profit for the year	651,541	504,894	282,783
Profit attributable to controlling shareholders	601,969	461,411	251,831
Attributable to noncontrolling interests	49,572	43,483	30,954
Total assets	4,287,337	5,310,924	4,575,230
Purchases of PP&E and intangible assets	8,973	7,564	6,910
Generation (renewable source) [Member]
Statement Line Items [Line Items]
Net operating revenue	1,489,932	1,334,571	1,262,297
Intersegment revenues	469,152	338,357	335,979
Cost of electric energy	(348,029)	(272,125)	(260,091)
Operating costs and expenses	(389,443)	(407,673)	(336,834)
Depreciation and amortization	(617,017)	(553,169)	(540,578)
Income from electric energy service	604,596	439,961	460,772
Equity	0	0	0
Finance income	137,746	132,653	131,354
Finance expenses	(648,571)	(667,344)	(599,303)
Profit (loss) before taxes	93,770	(94,730)	(7,176)
Income tax and social contribution	(74,125)	(46,311)	(49,222)
Profit for the year	19,645	(141,041)	(56,398)
Profit attributable to controlling shareholders	3,382	(75,731)	(35,781)
Attributable to noncontrolling interests	16,263	(65,311)	(20,617)
Total assets	12,815,017	12,459,791	11,868,943
Purchases of PP&E and intangible assets	621,046	978,896	493,584
Commercialization [Member]
Statement Line Items [Line Items]
Net operating revenue	3,402,804	2,024,350	1,716,348
Intersegment revenues	11,297	62,757	82,544
Cost of electric energy	(3,196,028)	(1,876,952)	(1,629,793)
Operating costs and expenses	(47,296)	(47,548)	(39,632)
Depreciation and amortization	(3,054)	(3,779)	(4,534)
Income from electric energy service	167,724	158,829	124,933
Equity	0	0	0
Finance income	19,117	31,513	42,840
Finance expenses	(52,023)	(24,761)	(38,386)
Profit (loss) before taxes	134,818	165,581	129,386
Income tax and social contribution	(44,527)	(53,225)	(41,282)
Profit for the year	90,290	112,357	88,104
Profit attributable to controlling shareholders	90,290	112,357	88,104
Attributable to noncontrolling interests	0	0	0
Total assets	931,546	466,021	714,781
Purchases of PP&E and intangible assets	2,927	3,713	2,432
Services [Member]
Statement Line Items [Line Items]
Net operating revenue	40,611	81,595	55,547
Intersegment revenues	444,935	318,770	239,088
Cost of electric energy		0	0
Operating costs and expenses	(398,188)	(322,131)	(251,385)
Depreciation and amortization	(19,760)	(12,870)	(12,633)
Income from electric energy service	67,598	65,363	30,617
Equity	0	0	0
Finance income	10,693	10,742	44,098
Finance expenses	(6,445)	(5,272)	(4,858)
Profit (loss) before taxes	71,846	70,832	69,857
Income tax and social contribution	(16,994)	(17,019)	(18,232)
Profit for the year	54,852	53,813	51,625
Profit attributable to controlling shareholders	54,852	53,813	51,625
Attributable to noncontrolling interests	0	0	0
Total assets	374,435	345,372	317,845
Purchases of PP&E and intangible assets	54,149	42,954	39,176
Total [Member]
Statement Line Items [Line Items]
Net operating revenue	26,743,623	19,051,456	20,551,967
Intersegment revenues	1,381,988	1,151,748	1,090,966
Cost of electric energy	(17,838,139)	(11,995,318)	(14,047,596)
Operating costs and expenses	(5,686,747)	(4,330,797)	(3,602,734)
Depreciation and amortization	(1,526,699)	(1,287,748)	(1,276,773)
Income from electric energy service	3,074,028	2,589,342	2,715,830
Equity	312,390	311,414	216,885
Finance income	867,402	1,138,848	1,068,938
Finance expenses	(2,301,928)	(2,591,546)	(2,448,634)
Profit (loss) before taxes	1,951,891	1,448,057	1,553,017
Income tax and social contribution	(530,844)	(510,833)	(560,939)
Profit for the year	1,421,045	937,225	992,079
Profit attributable to controlling shareholders	1,355,211	959,052	981,744
Attributable to noncontrolling interests	65,835	(21,828)	10,337
Total assets	40,686,787	41,469,889	39,614,885
Purchases of PP&E and intangible assets	2,569,598	2,233,748	1,410,597
Others [Member]
Statement Line Items [Line Items]
Net operating revenue	1,281	60,633	47,246
Intersegment revenues	0	8,661	3,136
Cost of electric energy	0	0	0
Operating costs and expenses	(51,121)	(132,611)	(117,649)
Depreciation and amortization	(2,353)	(3,417)	(3,128)
Income from electric energy service	(52,193)	(66,734)	(70,396)
Equity	0	0	0
Finance income	12,912	61,655	74,310
Finance expenses	(65,939)	(62,432)	(102,477)
Profit (loss) before taxes	(105,220)	(67,510)	(98,563)
Income tax and social contribution	(72,784)	9,343	(18,239)
Profit for the year	(178,004)	(58,167)	(116,802)
Profit attributable to controlling shareholders	(178,004)	(58,167)	(116,802)
Attributable to noncontrolling interests	0	0	0
Total assets	596,125	701,103	917,586
Purchases of PP&E and intangible assets	835	4,199	17,199
Elimination [Member]
Statement Line Items [Line Items]
Net operating revenue	0	0	0
Intersegment revenues	(1,381,988)	(1,160,410)	(1,094,101)
Cost of electric energy	936,621	795,075	735,849
Operating costs and expenses	445,366	365,334	358,257
Depreciation and amortization	0	0	0
Income from electric energy service	0	0	0
Equity	0	0	0
Finance income	0	0	0
Finance expenses	0	0	0
Profit (loss) before taxes	0	0	0
Income tax and social contribution	0	0	0
Profit for the year	0	0	0
Profit attributable to controlling shareholders	0	0	0
Attributable to noncontrolling interests	0	0	0
Total assets	0	0	0
Purchases of PP&E and intangible assets	R$ 0	R$ 0	R$ 0

(29) SEGMENT INFORMATION (De155

(29) SEGMENT INFORMATION (Details Narrative) - BRL (R$) R$ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Statement Line Items [Line Items]
Investments	R$ 1001550	R$ 1493753
CPFL Energias Renovaveis S.A. ("CPFL Renovaveis") [Member]
Statement Line Items [Line Items]
Impairment losses	R$ 20437	40,433
CPFL Telecom S.A. ("CPFL Telecom") [Member]
Statement Line Items [Line Items]
Impairment losses		R$ 7858

(30) RELATED PARTY TRANSACTI156

(30) RELATED PARTY TRANSACTIONS (Details) - BRL (R$) R$ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Bank balances and short-term investments [Member] | Banco Bradesco S.A. [Member]
Statement Line Items [Line Items]
TOTAL ASSETS		R$ 0
TOTAL LIABILITIES		0
INCOME		0	R$ 351086
EXPENSES		0	312
Bank balances and short-term investments [Member] | Banco do Brasil S.A. [Member]
Statement Line Items [Line Items]
TOTAL ASSETS		48,985
TOTAL LIABILITIES		0
INCOME		4,113	28,466
EXPENSES		5	4
Borrowings debentures and derivatives [Member] | Banco Bradesco S.A. [Member]
Statement Line Items [Line Items]
TOTAL ASSETS		0
TOTAL LIABILITIES		0
INCOME		0	0
EXPENSES		0	85,505
Borrowings debentures and derivatives [Member] | Banco do Brasil S.A. [Member]
Statement Line Items [Line Items]
TOTAL ASSETS		0
TOTAL LIABILITIES		4,257,562
INCOME		800	0
EXPENSES		463,949	459,889
Borrowings debentures and derivatives [Member] | Banco BNP Paribas Brasil S.A [Member]
Statement Line Items [Line Items]
TOTAL ASSETS		5,126
TOTAL LIABILITIES		0
INCOME		0	0
EXPENSES		67,196	8,978
Other financial transactions [Member] | Banco Bradesco S.A. [Member]
Statement Line Items [Line Items]
TOTAL ASSETS		0
TOTAL LIABILITIES		0
INCOME		0	166
EXPENSES		0	4,174
Other financial transactions [Member] | Banco do Brasil S.A. [Member]
Statement Line Items [Line Items]
TOTAL ASSETS		0
TOTAL LIABILITIES		962
INCOME	R$ 234	80
EXPENSES	6,408	5,941
Advances [Member] | BAESA - Energetica Barra Grande S.A. [Member]
Statement Line Items [Line Items]
TOTAL ASSETS	0	0
TOTAL LIABILITIES	691	726
INCOME	0	0	0
EXPENSES	0	0	0
Advances [Member] | Foz do Chapeco Energia S.A. [Member]
Statement Line Items [Line Items]
TOTAL ASSETS	0	0
TOTAL LIABILITIES	979	1,025
INCOME	0	0	0
EXPENSES	0	0	0
Advances [Member] | ENERCAN - Campos Novos Energia S.A. [Member]
Statement Line Items [Line Items]
TOTAL ASSETS	0	0
TOTAL LIABILITIES	1,212	1,269
INCOME	0	0	0
EXPENSES	0	0	0
Advances [Member] | EPASA - Centrais Eletricas da Paraiba [Member]
Statement Line Items [Line Items]
TOTAL ASSETS	0	0
TOTAL LIABILITIES	440	462
INCOME	0	0	0
EXPENSES	0	0	0
Energy purchases and sales, and charges [Member] | BAESA - Energetica Barra Grande S.A. [Member]
Statement Line Items [Line Items]
TOTAL ASSETS	0	0
TOTAL LIABILITIES	13,169	5,642
INCOME	0	0	6,080
EXPENSES	80,362	60,765	111,541
Energy purchases and sales, and charges [Member] | Foz do Chapeco Energia S.A. [Member]
Statement Line Items [Line Items]
TOTAL ASSETS	0	0
TOTAL LIABILITIES	37,415	35,018
INCOME	0	215	4,996
EXPENSES	381,193	358,272	330,675
Energy purchases and sales, and charges [Member] | ENERCAN - Campos Novos Energia S.A. [Member]
Statement Line Items [Line Items]
TOTAL ASSETS	823	387
TOTAL LIABILITIES	51,381	50,526
INCOME	8,763	3,684	23,283
EXPENSES	281,530	269,480	244,102
Energy purchases and sales, and charges [Member] | EPASA - Centrais Eletricas da Paraiba [Member]
Statement Line Items [Line Items]
TOTAL ASSETS	0	0
TOTAL LIABILITIES	13,330	0
INCOME	0	0	0
EXPENSES	91,302	0	0
Energy purchases and sales, and charges [Member] | AES Tiete S.A. [Member]
Statement Line Items [Line Items]
TOTAL ASSETS		0
TOTAL LIABILITIES		0
INCOME		2	0
EXPENSES		14,498	0
Energy purchases and sales, and charges [Member] | Afluente Transmissao de Energia Eletrica S.A. [Member]
Statement Line Items [Line Items]
TOTAL ASSETS		0
TOTAL LIABILITIES		53
INCOME		0	0
EXPENSES		1,212	1,426
Energy purchases and sales, and charges [Member] | Alianca Geracao de Energia S.A [Member]
Statement Line Items [Line Items]
TOTAL ASSETS		0
TOTAL LIABILITIES		1,183
INCOME		4	1
EXPENSES		49,944	34,063
Energy purchases and sales, and charges [Member] | Alpargatas S.A. [Member]
Statement Line Items [Line Items]
TOTAL ASSETS		0
TOTAL LIABILITIES		0
INCOME		2,954	0
EXPENSES		0	0
Energy purchases and sales, and charges [Member] | Arizona 1 Energia Renovavel S.A [Member]
Statement Line Items [Line Items]
TOTAL ASSETS		0
TOTAL LIABILITIES		0
INCOME		0	0
EXPENSES		967	883
Energy purchases and sales, and charges [Member] | Baguari I Geracao de Energia Eletrica S.A. [Member]
Statement Line Items [Line Items]
TOTAL ASSETS		0
TOTAL LIABILITIES		6
INCOME		0	0
EXPENSES		294	268
Energy purchases and sales, and charges [Member] | BRF Brasil Foods [Member]
Statement Line Items [Line Items]
TOTAL ASSETS		0
TOTAL LIABILITIES		0
INCOME		20,190	0
EXPENSES		0	0
Energy purchases and sales, and charges [Member] | Caetite 2 Energia Renovavel S.A. [Member]
Statement Line Items [Line Items]
TOTAL ASSETS		0
TOTAL LIABILITIES		0
INCOME		0	0
EXPENSES		889	810
Energy purchases and sales, and charges [Member] | Caetite 3 Energia Renovavel S.A. [Member]
Statement Line Items [Line Items]
TOTAL ASSETS		0
TOTAL LIABILITIES		0
INCOME		0	0
EXPENSES		896	817
Energy purchases and sales, and charges [Member] | Calango 1 Energia Renovavel S.A. [Member]
Statement Line Items [Line Items]
TOTAL ASSETS		0
TOTAL LIABILITIES		0
INCOME		0	0
EXPENSES		1,073	977
Energy purchases and sales, and charges [Member] | Calango 2 Energia Renovavel S.A. [Member]
Statement Line Items [Line Items]
TOTAL ASSETS		0
TOTAL LIABILITIES		0
INCOME		0	0
EXPENSES		916	834
Energy purchases and sales, and charges [Member] | Calango 3 Energia Renovavel S.A. [Member]
Statement Line Items [Line Items]
TOTAL ASSETS		0
TOTAL LIABILITIES		0
INCOME		0	0
EXPENSES		1,072	977
Energy purchases and sales, and charges [Member] | Calango 4 Energia Renovavel S.A. [Member]
Statement Line Items [Line Items]
TOTAL ASSETS		0
TOTAL LIABILITIES		0
INCOME		0	0
EXPENSES		995	907
Energy purchases and sales, and charges [Member] | Calango 5 Energia Renovavel S.A. [Member]
Statement Line Items [Line Items]
TOTAL ASSETS		0
TOTAL LIABILITIES		0
INCOME		0	0
EXPENSES		1,054	963
Energy purchases and sales, and charges [Member] | Companhia de Eletricidade do Estado da Bahia - COELBA [Member]
Statement Line Items [Line Items]
TOTAL ASSETS		743
TOTAL LIABILITIES		121
INCOME		19,296	14,491
EXPENSES		121	46
Energy purchases and sales, and charges [Member] | Companhia Energetica de Pernambuco - CELPE [Member]
Statement Line Items [Line Items]
TOTAL ASSETS		692
TOTAL LIABILITIES		20
INCOME		9,829	7,062
EXPENSES		250	206
Energy purchases and sales, and charges [Member] | Companhia Energetica do Rio Grande do Norte - COSERN [Member]
Statement Line Items [Line Items]
TOTAL ASSETS		267
TOTAL LIABILITIES		0
INCOME		3,128	2,580
EXPENSES		0	0
Energy purchases and sales, and charges [Member] | Companhia Hidreletrica Teles Pires S.A. [Member]
Statement Line Items [Line Items]
TOTAL ASSETS		0
TOTAL LIABILITIES		1,416
INCOME		57	17
EXPENSES		53,710	29,915
Energy purchases and sales, and charges [Member] | ELEB Equipamentos Ltda [Member]
Statement Line Items [Line Items]
TOTAL ASSETS		0
TOTAL LIABILITIES		0
INCOME		0	4,036
EXPENSES		0	0
Energy purchases and sales, and charges [Member] | Embraer [Member]
Statement Line Items [Line Items]
TOTAL ASSETS		0
TOTAL LIABILITIES		0
INCOME		6,938	26,615
EXPENSES		0	0
Energy purchases and sales, and charges [Member] | Energetica aguas da Pedra S.A. [Member]
Statement Line Items [Line Items]
TOTAL ASSETS		0
TOTAL LIABILITIES		112
INCOME		6	2
EXPENSES		4,716	4,260
Energy purchases and sales, and charges [Member] | Estaleiro Atlantico Sul S.A. [Member]
Statement Line Items [Line Items]
TOTAL ASSETS		0
TOTAL LIABILITIES		0
INCOME		7,978	19,026
EXPENSES		0	0
Energy purchases and sales, and charges [Member] | Goias Sul Geracao de Enegia S.A. [Member]
Statement Line Items [Line Items]
TOTAL ASSETS		0
TOTAL LIABILITIES		0
INCOME		0	0
EXPENSES		181	166
Energy purchases and sales, and charges [Member] | InterCement Brasil S.A [Member]
Statement Line Items [Line Items]
TOTAL ASSETS		0
TOTAL LIABILITIES		0
INCOME		2	1
EXPENSES		0	0
Energy purchases and sales, and charges [Member] | Itapebi Geracao de Energia S.A [Member]
Statement Line Items [Line Items]
TOTAL ASSETS		0
TOTAL LIABILITIES		0
INCOME		3	1
EXPENSES		0	0
Energy purchases and sales, and charges [Member] | Mel 2 Energia Renovavel S.A. [Member]
Statement Line Items [Line Items]
TOTAL ASSETS		0
TOTAL LIABILITIES		0
INCOME		0	0
EXPENSES		718	632
Energy purchases and sales, and charges [Member] | NC ENERGIA S.A. [Member]
Statement Line Items [Line Items]
TOTAL ASSETS		451
TOTAL LIABILITIES		2
INCOME		28,298	5,336
EXPENSES		6	0
Energy purchases and sales, and charges [Member] | Norte Energia S.A. [Member]
Statement Line Items [Line Items]
TOTAL ASSETS		1
TOTAL LIABILITIES		4,585
INCOME		17	1
EXPENSES		61,240	0
Energy purchases and sales, and charges [Member] | Rio PCH I S.A. [Member]
Statement Line Items [Line Items]
TOTAL ASSETS		0
TOTAL LIABILITIES		209
INCOME		0	0
EXPENSES		8,865	8,004
Energy purchases and sales, and charges [Member] | Samarco Mineracao S.A. [Member]
Statement Line Items [Line Items]
TOTAL ASSETS		0
TOTAL LIABILITIES		0
INCOME		2	1
EXPENSES		0	0
Energy purchases and sales, and charges [Member] | Santista Jeanswear S/A [Member]
Statement Line Items [Line Items]
TOTAL ASSETS		0
TOTAL LIABILITIES		0
INCOME		13,600	4,491
EXPENSES		0	0
Energy purchases and sales, and charges [Member] | Santista Work Solution S/A [Member]
Statement Line Items [Line Items]
TOTAL ASSETS		0
TOTAL LIABILITIES		0
INCOME		2,224	0
EXPENSES		0	0
Energy purchases and sales, and charges [Member] | SE Narandiba S.A. [Member]
Statement Line Items [Line Items]
TOTAL ASSETS		0
TOTAL LIABILITIES		2
INCOME		0	0
EXPENSES		152	166
Energy purchases and sales, and charges [Member] | Serra do Facao Energia S.A. - SEFAC [Member]
Statement Line Items [Line Items]
TOTAL ASSETS		0
TOTAL LIABILITIES		557
INCOME		0	0
EXPENSES		23,153	20,916
Energy purchases and sales, and charges [Member] | Termopernambuco S.A. [Member]
Statement Line Items [Line Items]
TOTAL ASSETS		0
TOTAL LIABILITIES		0
INCOME		5	3
EXPENSES		0	0
Energy purchases and sales, and charges [Member] | ThyssenKrupp Companhia Siderurgica do Atlantico [Member]
Statement Line Items [Line Items]
TOTAL ASSETS		0
TOTAL LIABILITIES		0
INCOME		25,268	37,238
EXPENSES		7,683	6,965
Energy purchases and sales, and charges [Member] | Tupy [Member]
Statement Line Items [Line Items]
TOTAL ASSETS		0
TOTAL LIABILITIES		0
INCOME		0	0
EXPENSES		27,127	0
Energy purchases and sales, and charges [Member] | Vale Energia S.A. [Member]
Statement Line Items [Line Items]
TOTAL ASSETS		8,680
TOTAL LIABILITIES		0
INCOME		102,069	92,353
EXPENSES		216	695
Intangible assets, property, plant and equipment, materials and services rendered [Member] | Banco Bradesco S.A. [Member]
Statement Line Items [Line Items]
TOTAL ASSETS		0
TOTAL LIABILITIES		0
INCOME		0	0
EXPENSES		0	19
Intangible assets, property, plant and equipment, materials and services rendered [Member] | Banco do Brasil S.A. [Member]
Statement Line Items [Line Items]
TOTAL ASSETS		0
TOTAL LIABILITIES		0
INCOME		0	0
EXPENSES		6	170
Intangible assets, property, plant and equipment, materials and services rendered [Member] | BAESA - Energetica Barra Grande S.A. [Member]
Statement Line Items [Line Items]
TOTAL ASSETS	153	56
TOTAL LIABILITIES	0	0
INCOME	1,582	521	1,354
EXPENSES	0	0	0
Intangible assets, property, plant and equipment, materials and services rendered [Member] | Foz do Chapeco Energia S.A. [Member]
Statement Line Items [Line Items]
TOTAL ASSETS	2	104
TOTAL LIABILITIES	0	0
INCOME	1,726	1,424	1,483
EXPENSES	0	0	0
Intangible assets, property, plant and equipment, materials and services rendered [Member] | ENERCAN - Campos Novos Energia S.A. [Member]
Statement Line Items [Line Items]
TOTAL ASSETS	152	74
TOTAL LIABILITIES	0	0
INCOME	1,665	1,826	1,354
EXPENSES	0	0	0
Intangible assets, property, plant and equipment, materials and services rendered [Member] | EPASA - Centrais Eletricas da Paraiba [Member]
Statement Line Items [Line Items]
TOTAL ASSETS	416	1,599
TOTAL LIABILITIES	0	0
INCOME	(469)	488	720
EXPENSES	0	0	0
Intangible assets, property, plant and equipment, materials and services rendered [Member] | Afluente Transmissao de Energia Eletrica S.A. [Member]
Statement Line Items [Line Items]
TOTAL ASSETS		0
TOTAL LIABILITIES		0
INCOME		0	0
EXPENSES		5	0
Intangible assets, property, plant and equipment, materials and services rendered [Member] | Alpargatas S.A. [Member]
Statement Line Items [Line Items]
TOTAL ASSETS		168
TOTAL LIABILITIES		0
INCOME		2,310	0
EXPENSES		0	0
Intangible assets, property, plant and equipment, materials and services rendered [Member] | BRF Brasil Foods [Member]
Statement Line Items [Line Items]
TOTAL ASSETS		0
TOTAL LIABILITIES		0
INCOME		1,250	0
EXPENSES		0	0
Intangible assets, property, plant and equipment, materials and services rendered [Member] | Companhia de Eletricidade do Estado da Bahia - COELBA [Member]
Statement Line Items [Line Items]
TOTAL ASSETS		0
TOTAL LIABILITIES		0
INCOME		0	0
EXPENSES		0	50
Intangible assets, property, plant and equipment, materials and services rendered [Member] | Estaleiro Atlantico Sul S.A. [Member]
Statement Line Items [Line Items]
TOTAL ASSETS		0
TOTAL LIABILITIES		0
INCOME		9	0
EXPENSES		0	0
Intangible assets, property, plant and equipment, materials and services rendered [Member] | InterCement Brasil S.A [Member]
Statement Line Items [Line Items]
TOTAL ASSETS		0
TOTAL LIABILITIES		0
INCOME		43	26
EXPENSES		0	0
Intangible assets, property, plant and equipment, materials and services rendered [Member] | NC ENERGIA S.A. [Member]
Statement Line Items [Line Items]
TOTAL ASSETS		0
TOTAL LIABILITIES		0
INCOME		17	0
EXPENSES		0	0
Intangible assets, property, plant and equipment, materials and services rendered [Member] | Santista Jeanswear S/A [Member]
Statement Line Items [Line Items]
TOTAL ASSETS		0
TOTAL LIABILITIES		0
INCOME		1	21
EXPENSES		0	0
Intangible assets, property, plant and equipment, materials and services rendered [Member] | Vale Energia S.A. [Member]
Statement Line Items [Line Items]
TOTAL ASSETS		0
TOTAL LIABILITIES		0
INCOME		331	0
EXPENSES		0	0
Intangible assets, property, plant and equipment, materials and services rendered [Member] | Brasil veiculos Companhia de Seguros [Member]
Statement Line Items [Line Items]
TOTAL ASSETS		0
TOTAL LIABILITIES		0
INCOME		2	0
EXPENSES		0	0
Intangible assets, property, plant and equipment, materials and services rendered [Member] | Companhia de Saneamento Basico do Estado de Sao Paulo - SABESP [Member]
Statement Line Items [Line Items]
TOTAL ASSETS		4
TOTAL LIABILITIES		42
INCOME		170	1,034
EXPENSES		94	31
Intangible assets, property, plant and equipment, materials and services rendered [Member] | Companhia Brasileira de Solucoes e Servicos CBSS - Alelo [Member]
Statement Line Items [Line Items]
TOTAL ASSETS		0
TOTAL LIABILITIES		0
INCOME		0	0
EXPENSES		0	576
Intangible assets, property, plant and equipment, materials and services rendered [Member] | Concessionaria Auto Raposo Tavares S.A. - CART [Member]
Statement Line Items [Line Items]
TOTAL ASSETS		0
TOTAL LIABILITIES		0
INCOME		0	0
EXPENSES		15	0
Intangible assets, property, plant and equipment, materials and services rendered [Member] | Concessionaria de Rodovias do Oeste de Sao Paulo - ViaOeste S.A. [Member]
Statement Line Items [Line Items]
TOTAL ASSETS		0
TOTAL LIABILITIES		0
INCOME		0	0
EXPENSES		6	0
Intangible assets, property, plant and equipment, materials and services rendered [Member] | Concessionaria do Sistema Anhanguera - Bandeirante S.A. [Member]
Statement Line Items [Line Items]
TOTAL ASSETS		86
TOTAL LIABILITIES		0
INCOME		0	0
EXPENSES		10	9
Intangible assets, property, plant and equipment, materials and services rendered [Member] | Ferrovia Centro-Atlantica S.A. [Member]
Statement Line Items [Line Items]
TOTAL ASSETS		0
TOTAL LIABILITIES		0
INCOME		0	0
EXPENSES		24	22
Intangible assets, property, plant and equipment, materials and services rendered [Member] | HM 02 Empreendimento Imobiliario SPE Ltda. [Member]
Statement Line Items [Line Items]
TOTAL ASSETS		0
TOTAL LIABILITIES		0
INCOME		45	0
EXPENSES		0	0
Intangible assets, property, plant and equipment, materials and services rendered [Member] | HM Engenharia e Construcoes S.A. [Member]
Statement Line Items [Line Items]
TOTAL ASSETS		0
TOTAL LIABILITIES		0
INCOME		0	272
EXPENSES		0	0
Intangible assets, property, plant and equipment, materials and services rendered [Member] | Industrias Romi S.A. [Member]
Statement Line Items [Line Items]
TOTAL ASSETS		4
TOTAL LIABILITIES		0
INCOME		51	68
EXPENSES		0	0
Intangible assets, property, plant and equipment, materials and services rendered [Member] | Oi Movel S.A [Member]
Statement Line Items [Line Items]
TOTAL ASSETS		0
TOTAL LIABILITIES		0
INCOME		0	0
EXPENSES		302	0
Intangible assets, property, plant and equipment, materials and services rendered [Member] | Logum Logistica S.A. [Member]
Statement Line Items [Line Items]
TOTAL ASSETS		26
TOTAL LIABILITIES		0
INCOME		730	55
EXPENSES		0	0
Intangible assets, property, plant and equipment, materials and services rendered [Member] | LUPATECH [Member]
Statement Line Items [Line Items]
TOTAL ASSETS		0
TOTAL LIABILITIES		0
INCOME		0	0
EXPENSES		0	2
Intangible assets, property, plant and equipment, materials and services rendered [Member] | Mapfre Seguros Gerais S.A. [Member]
Statement Line Items [Line Items]
TOTAL ASSETS		0
TOTAL LIABILITIES		0
INCOME		0	4
EXPENSES		0	1
Intangible assets, property, plant and equipment, materials and services rendered [Member] | Renovias Concessionaria S.A. [Member]
Statement Line Items [Line Items]
TOTAL ASSETS		0
TOTAL LIABILITIES		0
INCOME		0	0
EXPENSES		17	0
Intangible assets, property, plant and equipment, materials and services rendered [Member] | Rodovias Integradas do Oeste S.A. [Member]
Statement Line Items [Line Items]
TOTAL ASSETS		0
TOTAL LIABILITIES		0
INCOME		0	0
EXPENSES		3	0
Intangible assets, property, plant and equipment, materials and services rendered [Member] | SAMM - Sociedade de Atividades em Multimidia Ltda. [Member]
Statement Line Items [Line Items]
TOTAL ASSETS		0
TOTAL LIABILITIES		0
INCOME		1,410	1,463
EXPENSES		0	0
Intangible assets, property, plant and equipment, materials and services rendered [Member] | Tim Celular S.A. [Member]
Statement Line Items [Line Items]
TOTAL ASSETS		6
TOTAL LIABILITIES		89
INCOME		2,008	0
EXPENSES		12	0
Intangible assets, property, plant and equipment, materials and services rendered [Member] | TOTVS S.A. [Member]
Statement Line Items [Line Items]
TOTAL ASSETS		0
TOTAL LIABILITIES		2
INCOME		2	0
EXPENSES		32	44
Intangible assets, property, plant and equipment, materials and services rendered [Member] | Ultrafertil S.A [Member]
Statement Line Items [Line Items]
TOTAL ASSETS		0
TOTAL LIABILITIES		0
INCOME		14	868
EXPENSES		0	0
Intangible assets, property, plant and equipment, materials and services rendered [Member] | Vale S.A. [Member]
Statement Line Items [Line Items]
TOTAL ASSETS		0
TOTAL LIABILITIES		0
INCOME		0	0
EXPENSES		11	0
Intangible assets, property, plant and equipment, materials and services rendered [Member] | Vale Fertilizantes S.A [Member]
Statement Line Items [Line Items]
TOTAL ASSETS		0
TOTAL LIABILITIES		0
INCOME		0	45
EXPENSES		0	0
Intragroup loans [Member] | EPASA - Centrais Eletricas da Paraiba S.A. [Member]
Statement Line Items [Line Items]
TOTAL ASSETS	0	38,078
TOTAL LIABILITIES	0	0
INCOME	327	4,379	14,123
EXPENSES	0	0	0
Intragroup loans [Member] | Noncontrolling shareholders - CPFL Renovaveis [Member]
Statement Line Items [Line Items]
TOTAL ASSETS	8,612	9,067
TOTAL LIABILITIES	0	0
INCOME	(253)	1,039	1,475
EXPENSES	0	0	0
Dividend and interest on capital [Member] | BAESA - Energetica Barra Grande S.A. [Member]
Statement Line Items [Line Items]
TOTAL ASSETS	108	89
TOTAL LIABILITIES	0	0
INCOME	0	0	0
EXPENSES	0	0	0
Dividend and interest on capital [Member] | ENERCAN - Campos Novos Energia S.A. [Member]
Statement Line Items [Line Items]
TOTAL ASSETS	21,184	40,983
TOTAL LIABILITIES	0	0
INCOME	0	0	0
EXPENSES	0	0	0
Dividend and interest on capital [Member] | Chapecoense Geracao S.A. [Member]
Statement Line Items [Line Items]
TOTAL ASSETS	32,734	29,329
TOTAL LIABILITIES	0	0
INCOME	0	0	0
EXPENSES	0	0	0
Others [Member] | Instituto CPFL [Member]
Statement Line Items [Line Items]
TOTAL ASSETS	0	0
TOTAL LIABILITIES	0	0
INCOME	0	0	0
EXPENSES	R$ 3613	R$ 0	R$ 0

(30) RELATED PARTY TRANSACTI157

(30) RELATED PARTY TRANSACTIONS (Details Narrative) - BRL (R$) R$ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Related Party Transactions Details Narrative
Total compensation of key management personnel	R$ 73670	R$ 58132	R$ 43208
Short-term benefits of post	64,516	49,989	44,061
Post-employment benefits	1,516	1,212	1,087
Other long-term benefits	R$ 7638	R$ 6930	R$ 1940

(31) INSURANCE (Details)

(31) INSURANCE (Details) - BRL (R$) R$ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Statement Line Items [Line Items]
Principal insurance policies	R$ 9104679	R$ 11058537	R$ 9776496
Concession Financial Asset / Intangible Assets Policies [Member]
Statement Line Items [Line Items]
Type of coverage	Fire, lightening, explosion, machinery breakdown, electrical damage and engineering risk
Principal insurance policies	R$ 7440359	9,679,825	8,634,344
Transport Policies [Member]
Statement Line Items [Line Items]
Type of coverage	National transport
Principal insurance policies	R$ 302364	416,358	319,834
Stored Materials [Member]
Statement Line Items [Line Items]
Type of coverage	Fire, lightning, explosion and robbery
Principal insurance policies	R$ 229496	232,849	171,585
Automobiles [Member]
Statement Line Items [Line Items]
Type of coverage	Comprehensive cover
Principal insurance policies	R$ 16779	13,235	6,544
Civil Liability [Member]
Statement Line Items [Line Items]
Type of coverage	Electric energy distributors
Principal insurance policies	R$ 263000	200,000	118,000
Personnel [Member]
Statement Line Items [Line Items]
Type of coverage	Group life and personal accidents
Principal insurance policies	R$ 694341	234,357	202,989
Others [Member]
Statement Line Items [Line Items]
Type of coverage	Operational risks and others
Principal insurance policies	R$ 158340	R$ 281914	R$ 323200

(33) FINANCIAL INSTRUMENTS (Det

(33) FINANCIAL INSTRUMENTS (Details) - BRL (R$) R$ in Thousands	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Asset
Cash and cash equivalent	R$ 3249642	R$ 6164997	R$ 5682802	R$ 4357455
Derivatives - zero-cost collar	444,029	163,241
Concession financial asset - distribution	23,736
Liability
Borrowings - principal and interest	3,589,607	1,875,648
Borrowings - principal and interest	10,992,057	13,044,041
Debentures - Principal and interest	1,703,073
Derivatives	10,230	R$ 6055
Financial liability	29,019,225
Carrying Amount [Member]
Asset
Financial assets	10,228,253
Liability
Financial liability	20,263,390
At fair value [member]
Asset
Financial assets	10,228,253
Liability
Financial liability	18,437,887
Level 1 [Member] | Carrying Amount [Member]
Asset
Cash and cash equivalent	2,289,302
Level 1 [Member] | At fair value [member]
Asset
Cash and cash equivalent	2,289,302
Level 2 [Member] | Carrying Amount [Member]
Asset
Cash and cash equivalent	960,340
Derivatives - zero-cost collar	595,872
Liability
Borrowings - principal and interest	6,142,583
Borrowings - principal and interest	4,849,474
Debentures - Principal and interest	9,176,527
Derivatives	94,806
Level 2 [Member] | At fair value [member]
Asset
Cash and cash equivalent	960,340
Derivatives - zero-cost collar	595,872
Liability
Borrowings - principal and interest	5,912,175
Borrowings - principal and interest	4,849,474
Debentures - Principal and interest	7,581,432
Derivatives	94,806
Level 3 [Member] | Carrying Amount [Member]
Asset
Derivatives - zero-cost collar	52,058
Concession financial asset - distribution	6,330,681
Level 3 [Member] | At fair value [member]
Asset
Derivatives - zero-cost collar	52,058
Concession financial asset - distribution	R$ 6330681

(33) FINANCIAL INSTRUMENTS (De

(33) FINANCIAL INSTRUMENTS (Details 1) - BRL (R$) R$ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Statement Line Items [Line Items]
Fair value (carrying amounts) - assets	R$ 203901	R$ 641357
Fair value (carrying amounts) - assets	647,930	804,598
Fair value (carrying amounts) - liabilities	(94,806)	(118,262)
The net fair value of financial assets and liabilities	553,124
The net value of derivative instruments at cost	544,029
Gain (loss) on marking to market	9,095	57,715
Current Financial Assets	444,029	163,241
Current Financial Liabilities	10,230	6,055
Noncurrent Financial Liabilities	84,576	R$ 112207
Designated as Hedging Instrument [Member] | Exchange Rate Hedge [Member]
Statement Line Items [Line Items]
Fair value (carrying amounts) - assets	569,809
Fair value (carrying amounts) - liabilities	(94,806)
The net fair value of financial assets and liabilities	475,004
The net value of derivative instruments at cost	526,148
Gain (loss) on marking to market	(51,145)
Designated as Hedging Instrument [Member] | Exchange Rate Hedge [Member] | Companhia Paulista de Forca e Luz ("CPFL Paulista") [Member]
Statement Line Items [Line Items]
Fair value (carrying amounts) - assets	266,911
Fair value (carrying amounts) - liabilities	(25,124)
The net fair value of financial assets and liabilities	241,787
The net value of derivative instruments at cost	258,941
Gain (loss) on marking to market	(17,154)
Designated as Hedging Instrument [Member] | Exchange Rate Hedge [Member] | Companhia Paulista de Forca e Luz ("CPFL Paulista") [Member] | Bank of Tokyo-Mitsubishi [Member]
Statement Line Items [Line Items]
Fair value (carrying amounts) - assets	34,627
Fair value (carrying amounts) - liabilities	0
The net fair value of financial assets and liabilities	34,627
The net value of derivative instruments at cost	35,864
Gain (loss) on marking to market	R$ 1237
Currency / index	dollar
Maturity range	March 2,019
Notional	R$ 117400
Designated as Hedging Instrument [Member] | Exchange Rate Hedge [Member] | Companhia Paulista de Forca e Luz ("CPFL Paulista") [Member] | Bank of America Merrill Lynch [Member]
Statement Line Items [Line Items]
Fair value (carrying amounts) - assets	42,466
Fair value (carrying amounts) - liabilities	0
The net fair value of financial assets and liabilities	42,466
The net value of derivative instruments at cost	42,830
Gain (loss) on marking to market	R$ 363
Currency / index	dollar
Maturity range	September 2,018
Notional	R$ 106020
Designated as Hedging Instrument [Member] | Exchange Rate Hedge [Member] | Companhia Paulista de Forca e Luz ("CPFL Paulista") [Member] | Bank of America Merrill Lynch [Member]
Statement Line Items [Line Items]
Fair value (carrying amounts) - assets	48,135
Fair value (carrying amounts) - liabilities	0
The net fair value of financial assets and liabilities	48,135
The net value of derivative instruments at cost	48,802
Gain (loss) on marking to market	R$ 667
Currency / index	dollar
Maturity range	March 2,019
Notional	R$ 116600
Designated as Hedging Instrument [Member] | Exchange Rate Hedge [Member] | Companhia Paulista de Forca e Luz ("CPFL Paulista") [Member] | J.P.Morgan [Member]
Statement Line Items [Line Items]
Fair value (carrying amounts) - assets	24,067
Fair value (carrying amounts) - liabilities	0
The net fair value of financial assets and liabilities	24,067
The net value of derivative instruments at cost	24,401
Gain (loss) on marking to market	R$ 334
Currency / index	dollar
Maturity range	March 2,019
Notional	R$ 58300
Designated as Hedging Instrument [Member] | Exchange Rate Hedge [Member] | Companhia Paulista de Forca e Luz ("CPFL Paulista") [Member] | J.P.Morgan [Member]
Statement Line Items [Line Items]
Fair value (carrying amounts) - assets	13,808
Fair value (carrying amounts) - liabilities	0
The net fair value of financial assets and liabilities	13,808
The net value of derivative instruments at cost	13,659
Gain (loss) on marking to market	R$ 149
Currency / index	dollar
Maturity range	January 2,019
Notional	R$ 67613
Designated as Hedging Instrument [Member] | Exchange Rate Hedge [Member] | Companhia Paulista de Forca e Luz ("CPFL Paulista") [Member] | Bank of Tokyo-Mitsubishi [Member]
Statement Line Items [Line Items]
Fair value (carrying amounts) - assets	14,124
Fair value (carrying amounts) - liabilities	0
The net fair value of financial assets and liabilities	14,124
The net value of derivative instruments at cost	22,015
Gain (loss) on marking to market	R$ 7891
Currency / index	dollar
Maturity range	February 2,020
Notional	R$ 142735
Designated as Hedging Instrument [Member] | Exchange Rate Hedge [Member] | Companhia Paulista de Forca e Luz ("CPFL Paulista") [Member] | Bank of America Merrill Lynch [Member]
Statement Line Items [Line Items]
Fair value (carrying amounts) - assets	89,684
Fair value (carrying amounts) - liabilities	0
The net fair value of financial assets and liabilities	89,684
The net value of derivative instruments at cost	89,289
Gain (loss) on marking to market	R$ 395
Currency / index	dollar
Maturity range	February 2,018
Notional	R$ 405300
Designated as Hedging Instrument [Member] | Exchange Rate Hedge [Member] | Companhia Paulista de Forca e Luz ("CPFL Paulista") [Member] | Bank of America Merrill Lynch [Member]
Statement Line Items [Line Items]
Fair value (carrying amounts) - assets	0
Fair value (carrying amounts) - liabilities	(5,236)
The net fair value of financial assets and liabilities	(5,236)
The net value of derivative instruments at cost	(1,653)
Gain (loss) on marking to market	R$ 3583
Currency / index	dollar
Maturity range	October 2,018
Notional	R$ 329500
Designated as Hedging Instrument [Member] | Exchange Rate Hedge [Member] | Companhia Paulista de Forca e Luz ("CPFL Paulista") [Member] | Bradesco [Member]
Statement Line Items [Line Items]
Fair value (carrying amounts) - assets	0
Fair value (carrying amounts) - liabilities	(5,163)
The net fair value of financial assets and liabilities	(5,163)
The net value of derivative instruments at cost	(4,068)
Gain (loss) on marking to market	R$ 1095
Currency / index	dollar
Maturity range	May 2,021
Notional	R$ 59032
Designated as Hedging Instrument [Member] | Exchange Rate Hedge [Member] | Companhia Paulista de Forca e Luz ("CPFL Paulista") [Member] | Bank of America Merrill Lynch [Member]
Statement Line Items [Line Items]
Fair value (carrying amounts) - assets	0
Fair value (carrying amounts) - liabilities	(4,805)
The net fair value of financial assets and liabilities	(4,805)
The net value of derivative instruments at cost	(4,055)
Gain (loss) on marking to market	R$ 750
Currency / index	dollar
Maturity range	May 2,021
Notional	R$ 59032
Designated as Hedging Instrument [Member] | Exchange Rate Hedge [Member] | Companhia Paulista de Forca e Luz ("CPFL Paulista") [Member] | Citibank [Member]
Statement Line Items [Line Items]
Fair value (carrying amounts) - assets	0
Fair value (carrying amounts) - liabilities	(4,971)
The net fair value of financial assets and liabilities	(4,971)
The net value of derivative instruments at cost	(4,062)
Gain (loss) on marking to market	R$ 910
Currency / index	dollar
Maturity range	May 2,021
Notional	R$ 59032
Designated as Hedging Instrument [Member] | Exchange Rate Hedge [Member] | Companhia Paulista de Forca e Luz ("CPFL Paulista") [Member] | Citibank [Member]
Statement Line Items [Line Items]
Fair value (carrying amounts) - assets	0
Fair value (carrying amounts) - liabilities	(4,948)
The net fair value of financial assets and liabilities	(4,948)
The net value of derivative instruments at cost	(4,080)
Gain (loss) on marking to market	R$ 868
Currency / index	dollar
Maturity range	May 2,021
Notional	R$ 59032
Designated as Hedging Instrument [Member] | Exchange Rate Hedge [Member] | Companhia Piratininga de Forca e Luz ("CPFL Piratininga") [Member]
Statement Line Items [Line Items]
Fair value (carrying amounts) - assets	167,645
Fair value (carrying amounts) - liabilities	(19,753)
The net fair value of financial assets and liabilities	147,891
The net value of derivative instruments at cost	158,850
Gain (loss) on marking to market	(10,959)
Designated as Hedging Instrument [Member] | Exchange Rate Hedge [Member] | Companhia Piratininga de Forca e Luz ("CPFL Piratininga") [Member] | Bank of America Merrill Lynch [Member]
Statement Line Items [Line Items]
Fair value (carrying amounts) - assets	0
Fair value (carrying amounts) - liabilities	(4,805)
The net fair value of financial assets and liabilities	(4,805)
The net value of derivative instruments at cost	(4,055)
Gain (loss) on marking to market	R$ 750
Currency / index	dollar
Maturity range	May 2,021
Notional	R$ 59032
Designated as Hedging Instrument [Member] | Exchange Rate Hedge [Member] | Companhia Piratininga de Forca e Luz ("CPFL Piratininga") [Member] | Bank of America Merrill Lynch [Member]
Statement Line Items [Line Items]
Fair value (carrying amounts) - assets	0
Fair value (carrying amounts) - liabilities	(2,339)
The net fair value of financial assets and liabilities	(2,339)
The net value of derivative instruments at cost	(2,035)
Gain (loss) on marking to market	R$ 304
Currency / index	dollar
Maturity range	May 2,021
Notional	R$ 29516
Designated as Hedging Instrument [Member] | Exchange Rate Hedge [Member] | Companhia Piratininga de Forca e Luz ("CPFL Piratininga") [Member] | J.P.Morgan [Member]
Statement Line Items [Line Items]
Fair value (carrying amounts) - assets	27,050
Fair value (carrying amounts) - liabilities	0
The net fair value of financial assets and liabilities	27,050
The net value of derivative instruments at cost	27,259
Gain (loss) on marking to market	R$ 209
Currency / index	dollar
Maturity range	April 2,018
Notional	R$ 55138
Designated as Hedging Instrument [Member] | Exchange Rate Hedge [Member] | Companhia Piratininga de Forca e Luz ("CPFL Piratininga") [Member] | Bradesco [Member]
Statement Line Items [Line Items]
Fair value (carrying amounts) - assets	27,046
Fair value (carrying amounts) - liabilities	0
The net fair value of financial assets and liabilities	27,046
The net value of derivative instruments at cost	27,257
Gain (loss) on marking to market	R$ 211
Currency / index	dollar
Maturity range	April 2,018
Notional	R$ 55138
Designated as Hedging Instrument [Member] | Exchange Rate Hedge [Member] | Companhia Piratininga de Forca e Luz ("CPFL Piratininga") [Member] | Citibank [Member]
Statement Line Items [Line Items]
Fair value (carrying amounts) - assets	45,457
Fair value (carrying amounts) - liabilities	0
The net fair value of financial assets and liabilities	45,457
The net value of derivative instruments at cost	47,966
Gain (loss) on marking to market	R$ 2509
Currency / index	dollar
Maturity range	March 2,019
Notional	R$ 117250
Designated as Hedging Instrument [Member] | Exchange Rate Hedge [Member] | Companhia Piratininga de Forca e Luz ("CPFL Piratininga") [Member] | Citibank [Member]
Statement Line Items [Line Items]
Fair value (carrying amounts) - assets	30,880
Fair value (carrying amounts) - liabilities	0
The net fair value of financial assets and liabilities	30,880
The net value of derivative instruments at cost	35,979
Gain (loss) on marking to market	R$ 5099
Currency / index	dollar
Maturity range	January 2,020
Notional	R$ 169838
Designated as Hedging Instrument [Member] | Exchange Rate Hedge [Member] | Companhia Piratininga de Forca e Luz ("CPFL Piratininga") [Member] | BNP Paribas [Member]
Statement Line Items [Line Items]
Fair value (carrying amounts) - assets	37,212
Fair value (carrying amounts) - liabilities	0
The net fair value of financial assets and liabilities	37,212
The net value of derivative instruments at cost	36,649
Gain (loss) on marking to market	R$ 563
Currency / index	euro
Maturity range	January 2,018
Notional	R$ 175714
Designated as Hedging Instrument [Member] | Exchange Rate Hedge [Member] | Companhia Piratininga de Forca e Luz ("CPFL Piratininga") [Member] | Bradesco [Member]
Statement Line Items [Line Items]
Fair value (carrying amounts) - assets	0
Fair value (carrying amounts) - liabilities	(5,163)
The net fair value of financial assets and liabilities	(5,163)
The net value of derivative instruments at cost	(4,068)
Gain (loss) on marking to market	R$ 1095
Currency / index	dollar
Maturity range	May 2,021
Notional	R$ 59032
Designated as Hedging Instrument [Member] | Exchange Rate Hedge [Member] | Companhia Piratininga de Forca e Luz ("CPFL Piratininga") [Member] | Citibank [Member]
Statement Line Items [Line Items]
Fair value (carrying amounts) - assets	0
Fair value (carrying amounts) - liabilities	(4,971)
The net fair value of financial assets and liabilities	(4,971)
The net value of derivative instruments at cost	(4,062)
Gain (loss) on marking to market	R$ 910
Currency / index	dollar
Maturity range	May 2,021
Notional	R$ 59032
Designated as Hedging Instrument [Member] | Exchange Rate Hedge [Member] | Companhia Piratininga de Forca e Luz ("CPFL Piratininga") [Member] | Citibank [Member]
Statement Line Items [Line Items]
Fair value (carrying amounts) - assets	0
Fair value (carrying amounts) - liabilities	(2,474)
The net fair value of financial assets and liabilities	(2,474)
The net value of derivative instruments at cost	(2,040)
Gain (loss) on marking to market	R$ 434
Currency / index	dollar
Maturity range	May 2,021
Notional	R$ 29516
Designated as Hedging Instrument [Member] | Exchange Rate Hedge [Member] | CPFL Geracao de Energia S.A. ("CPFL Geracao") [Member]
Statement Line Items [Line Items]
Fair value (carrying amounts) - assets	0
Fair value (carrying amounts) - liabilities	(27,607)
The net fair value of financial assets and liabilities	(27,607)
The net value of derivative instruments at cost	(17,129)
Gain (loss) on marking to market	(10,478)
Designated as Hedging Instrument [Member] | Exchange Rate Hedge [Member] | CPFL Geracao de Energia S.A. ("CPFL Geracao") [Member] | Bradesco [Member]
Statement Line Items [Line Items]
Fair value (carrying amounts) - assets	0
Fair value (carrying amounts) - liabilities	(103)
The net fair value of financial assets and liabilities	(103)
The net value of derivative instruments at cost	433
Gain (loss) on marking to market	R$ 536
Currency / index	dollar
Maturity range	September 2,019
Notional	R$ 32636
Designated as Hedging Instrument [Member] | Exchange Rate Hedge [Member] | CPFL Geracao de Energia S.A. ("CPFL Geracao") [Member] | Citibank [Member]
Statement Line Items [Line Items]
Fair value (carrying amounts) - assets	0
Fair value (carrying amounts) - liabilities	(10,985)
The net fair value of financial assets and liabilities	(10,985)
The net value of derivative instruments at cost	(613)
Gain (loss) on marking to market	R$ 10372
Currency / index	dollar
Maturity range	September 2,020
Notional	R$ 397320
Designated as Hedging Instrument [Member] | Exchange Rate Hedge [Member] | CPFL Geracao de Energia S.A. ("CPFL Geracao") [Member] | Scotiabank [Member]
Statement Line Items [Line Items]
Fair value (carrying amounts) - assets	0
Fair value (carrying amounts) - liabilities	(2,070)
The net fair value of financial assets and liabilities	(2,070)
The net value of derivative instruments at cost	(2,355)
Gain (loss) on marking to market	R$ 286
Currency / index	dollar
Maturity range	July 2,019
Notional	R$ 117036
Designated as Hedging Instrument [Member] | Exchange Rate Hedge [Member] | CPFL Geracao de Energia S.A. ("CPFL Geracao") [Member] | Votorantim [Member]
Statement Line Items [Line Items]
Fair value (carrying amounts) - assets	0
Fair value (carrying amounts) - liabilities	(5,339)
The net fair value of financial assets and liabilities	(5,339)
The net value of derivative instruments at cost	(5,316)
Gain (loss) on marking to market	R$ 23
Currency / index	dollar
Maturity range	June 2,019
Notional	R$ 104454
Designated as Hedging Instrument [Member] | Exchange Rate Hedge [Member] | CPFL Geracao de Energia S.A. ("CPFL Geracao") [Member] | Scotiabank [Member]
Statement Line Items [Line Items]
Fair value (carrying amounts) - assets	0
Fair value (carrying amounts) - liabilities	(9,110)
The net fair value of financial assets and liabilities	(9,110)
The net value of derivative instruments at cost	(9,278)
Gain (loss) on marking to market	R$ 167
Currency / index	dollar
Maturity range	December 2,019
Notional	R$ 174525
Designated as Hedging Instrument [Member] | Exchange Rate Hedge [Member] | Rio Grande Energia S.A. ("RGE") [Member]
Statement Line Items [Line Items]
Fair value (carrying amounts) - assets	124,448
Fair value (carrying amounts) - liabilities	(19,619)
The net fair value of financial assets and liabilities	104,829
The net value of derivative instruments at cost	110,579
Gain (loss) on marking to market	(5,750)
Designated as Hedging Instrument [Member] | Exchange Rate Hedge [Member] | Rio Grande Energia S.A. ("RGE") [Member] | Bank of Tokyo-Mitsubishi [Member]
Statement Line Items [Line Items]
Fair value (carrying amounts) - assets	22,785
Fair value (carrying amounts) - liabilities	0
The net fair value of financial assets and liabilities	22,785
The net value of derivative instruments at cost	23,054
Gain (loss) on marking to market	R$ 270
Currency / index	dollar
Maturity range	April 2,018
Notional	R$ 36270
Designated as Hedging Instrument [Member] | Exchange Rate Hedge [Member] | Rio Grande Energia S.A. ("RGE") [Member] | Bank of America Merrill Lynch [Member]
Statement Line Items [Line Items]
Fair value (carrying amounts) - assets	0
Fair value (carrying amounts) - liabilities	(4,805)
The net fair value of financial assets and liabilities	(4,805)
The net value of derivative instruments at cost	(4,055)
Gain (loss) on marking to market	R$ 750
Currency / index	dollar
Maturity range	May 2,021
Notional	R$ 59032
Designated as Hedging Instrument [Member] | Exchange Rate Hedge [Member] | Rio Grande Energia S.A. ("RGE") [Member] | Bank of Tokyo-Mitsubishi [Member]
Statement Line Items [Line Items]
Fair value (carrying amounts) - assets	101,289
Fair value (carrying amounts) - liabilities	0
The net fair value of financial assets and liabilities	101,289
The net value of derivative instruments at cost	102,467
Gain (loss) on marking to market	R$ 1178
Currency / index	dollar
Maturity range	May 2,018
Notional	R$ 168346
Designated as Hedging Instrument [Member] | Exchange Rate Hedge [Member] | Rio Grande Energia S.A. ("RGE") [Member] | Bank of America Merrill Lynch [Member]
Statement Line Items [Line Items]
Fair value (carrying amounts) - assets	0
Fair value (carrying amounts) - liabilities	(4,678)
The net fair value of financial assets and liabilities	(4,678)
The net value of derivative instruments at cost	(4,070)
Gain (loss) on marking to market	R$ 609
Currency / index	dollar
Maturity range	May 2,021
Notional	R$ 59032
Designated as Hedging Instrument [Member] | Exchange Rate Hedge [Member] | Rio Grande Energia S.A. ("RGE") [Member] | Citibank [Member]
Statement Line Items [Line Items]
Fair value (carrying amounts) - assets	0
Fair value (carrying amounts) - liabilities	(4,971)
The net fair value of financial assets and liabilities	(4,971)
The net value of derivative instruments at cost	(4,062)
Gain (loss) on marking to market	R$ 910
Currency / index	dollar
Maturity range	May 2,021
Notional	R$ 59032
Designated as Hedging Instrument [Member] | Exchange Rate Hedge [Member] | Rio Grande Energia S.A. ("RGE") [Member] | Bank of Tokyo-Mitsubishi [Member]
Statement Line Items [Line Items]
Fair value (carrying amounts) - assets	374
Fair value (carrying amounts) - liabilities	0
The net fair value of financial assets and liabilities	374
The net value of derivative instruments at cost	1,313
Gain (loss) on marking to market	R$ 939
Currency / index	dollar
Maturity range	October 2,018
Notional	R$ 169260
Designated as Hedging Instrument [Member] | Exchange Rate Hedge [Member] | Companhia Leste Paulista de Energia ("CPFL Leste Paulista") [Member] | Bradesco [Member]
Statement Line Items [Line Items]
Fair value (carrying amounts) - assets	0
Fair value (carrying amounts) - liabilities	(5,163)
The net fair value of financial assets and liabilities	(5,163)
The net value of derivative instruments at cost	(4,068)
Gain (loss) on marking to market	R$ 1095
Currency / index	dollar
Maturity range	May 2,021
Notional	R$ 59032
Designated as Hedging Instrument [Member] | Exchange Rate Hedge [Member] | Companhia Jaguari de Energia ( "CPFL Santa Cruz") [Member] | Scotiabank [Member]
Statement Line Items [Line Items]
Fair value (carrying amounts) - assets	0
Fair value (carrying amounts) - liabilities	(1,167)
The net fair value of financial assets and liabilities	(1,167)
The net value of derivative instruments at cost	(1,327)
Gain (loss) on marking to market	R$ 160
Currency / index	dollar
Maturity range	July 2,019
Notional	R$ 65936
Designated as Hedging Instrument [Member] | Exchange Rate Hedge [Member] | Paulista Lajeado Energia S.A. ("Paulista Lajeado") [Member] | Itau [Member]
Statement Line Items [Line Items]
Fair value (carrying amounts) - assets	598
Fair value (carrying amounts) - liabilities	0
The net fair value of financial assets and liabilities	598
The net value of derivative instruments at cost	557
Gain (loss) on marking to market	R$ 41
Currency / index	dollar
Maturity range	March 2,018
Notional	R$ 35000
Designated as Hedging Instrument [Member] | Exchange Rate Hedge [Member] | CPFL Comercializacao Brasil S.A. ("CPFL Brasil") [Member]
Statement Line Items [Line Items]
Fair value (carrying amounts) - assets	10,208
Fair value (carrying amounts) - liabilities	(1,537)
The net fair value of financial assets and liabilities	8,671
The net value of derivative instruments at cost	15,676
Gain (loss) on marking to market	(7,005)
Designated as Hedging Instrument [Member] | Exchange Rate Hedge [Member] | CPFL Comercializacao Brasil S.A. ("CPFL Brasil") [Member] | Scotiabank [Member]
Statement Line Items [Line Items]
Fair value (carrying amounts) - assets	0
Fair value (carrying amounts) - liabilities	(1,537)
The net fair value of financial assets and liabilities	(1,537)
The net value of derivative instruments at cost	(1,608)
Gain (loss) on marking to market	R$ 71
Currency / index	dollar
Maturity range	August 2,018
Notional	R$ 45360
Designated as Hedging Instrument [Member] | Exchange Rate Hedge [Member] | CPFL Comercializacao Brasil S.A. ("CPFL Brasil") [Member] | Scotiabank [Member]
Statement Line Items [Line Items]
Fair value (carrying amounts) - assets	6,243
Fair value (carrying amounts) - liabilities	0
The net fair value of financial assets and liabilities	6,243
The net value of derivative instruments at cost	10,610
Gain (loss) on marking to market	R$ 4367
Currency / index	dollar
Maturity range	September 2,020
Notional	R$ 249989
Designated as Hedging Instrument [Member] | Exchange Rate Hedge [Member] | CPFL Comercializacao Brasil S.A. ("CPFL Brasil") [Member] | Scotiabank [Member]
Statement Line Items [Line Items]
Fair value (carrying amounts) - assets	3,964
Fair value (carrying amounts) - liabilities	0
The net fair value of financial assets and liabilities	3,964
The net value of derivative instruments at cost	6,674
Gain (loss) on marking to market	R$ 2709
Currency / index	dollar
Maturity range	October 2,020
Notional	R$ 150011
Not Designated as Hedging Instrument [Member] | Exchange Rate Hedge [Member] | CPFL Geracao de Energia S.A. ("CPFL Geracao") [Member] | J.P.Morgan [Member]
Statement Line Items [Line Items]
Gain (loss) on marking to market	R$ 1919
Currency / index	IPCA
Maturity range	April 2,019
Not Designated as Hedging Instrument [Member] | Price Index Hedge [Member]
Statement Line Items [Line Items]
Fair value (carrying amounts) - assets	R$ 20525
Fair value (carrying amounts) - liabilities	0
The net fair value of financial assets and liabilities	20,525
The net value of derivative instruments at cost	16,688
Gain (loss) on marking to market	3,837
Not Designated as Hedging Instrument [Member] | Price Index Hedge [Member] | CPFL Geracao de Energia S.A. ("CPFL Geracao") [Member] | J.P.Morgan [Member]
Statement Line Items [Line Items]
Fair value (carrying amounts) - assets	10,263
Fair value (carrying amounts) - liabilities	0
The net fair value of financial assets and liabilities	10,263
The net value of derivative instruments at cost	8,344
Notional	35,235
Not Designated as Hedging Instrument [Member] | Price Index Hedge [Member] | CPFL Geracao de Energia S.A. ("CPFL Geracao") [Member] | Santander [Member]
Statement Line Items [Line Items]
Fair value (carrying amounts) - assets	10,263
Fair value (carrying amounts) - liabilities	0
The net fair value of financial assets and liabilities	10,263
The net value of derivative instruments at cost	8,344
Gain (loss) on marking to market	R$ 1919
Currency / index	IPCA
Maturity range	April 2,019
Notional	R$ 35235
Not Designated as Hedging Instrument [Member] | Interest Rate Hedge [Member]
Statement Line Items [Line Items]
Fair value (carrying amounts) - assets	26,063
Fair value (carrying amounts) - liabilities	0
The net fair value of financial assets and liabilities	26,063
The net value of derivative instruments at cost	17,881
Gain (loss) on marking to market	8,182
Not Designated as Hedging Instrument [Member] | Interest Rate Hedge [Member] | Companhia Paulista de Forca e Luz ("CPFL Paulista") [Member]
Statement Line Items [Line Items]
Fair value (carrying amounts) - assets	1,893
Fair value (carrying amounts) - liabilities	0
The net fair value of financial assets and liabilities	1,893
The net value of derivative instruments at cost	434
Gain (loss) on marking to market	1,459
Not Designated as Hedging Instrument [Member] | Interest Rate Hedge [Member] | Companhia Paulista de Forca e Luz ("CPFL Paulista") [Member] | J.P.Morgan [Member]
Statement Line Items [Line Items]
Fair value (carrying amounts) - assets	1,112
Fair value (carrying amounts) - liabilities	0
The net fair value of financial assets and liabilities	1,112
The net value of derivative instruments at cost	255
Gain (loss) on marking to market	R$ 857
Currency / index	CDI
Maturity range	February 2,021
Notional	R$ 300000
Not Designated as Hedging Instrument [Member] | Interest Rate Hedge [Member] | Companhia Paulista de Forca e Luz ("CPFL Paulista") [Member] | Votorantim [Member]
Statement Line Items [Line Items]
Fair value (carrying amounts) - assets	380
Fair value (carrying amounts) - liabilities	0
The net fair value of financial assets and liabilities	380
The net value of derivative instruments at cost	87
Gain (loss) on marking to market	R$ 293
Currency / index	CDI
Maturity range	February 2,021
Notional	R$ 100000
Not Designated as Hedging Instrument [Member] | Interest Rate Hedge [Member] | Companhia Paulista de Forca e Luz ("CPFL Paulista") [Member] | Santander [Member]
Statement Line Items [Line Items]
Fair value (carrying amounts) - assets	401
Fair value (carrying amounts) - liabilities	0
The net fair value of financial assets and liabilities	401
The net value of derivative instruments at cost	92
Gain (loss) on marking to market	R$ 309
Currency / index	CDI
Maturity range	February 2,021
Notional	R$ 105000
Not Designated as Hedging Instrument [Member] | Interest Rate Hedge [Member] | Companhia Piratininga de Forca e Luz ("CPFL Piratininga") [Member]
Statement Line Items [Line Items]
Fair value (carrying amounts) - assets	938
Fair value (carrying amounts) - liabilities	0
The net fair value of financial assets and liabilities	938
The net value of derivative instruments at cost	213
Gain (loss) on marking to market	724
Not Designated as Hedging Instrument [Member] | Interest Rate Hedge [Member] | Companhia Piratininga de Forca e Luz ("CPFL Piratininga") [Member] | Votorantim [Member]
Statement Line Items [Line Items]
Fair value (carrying amounts) - assets	536
Fair value (carrying amounts) - liabilities	0
The net fair value of financial assets and liabilities	536
The net value of derivative instruments at cost	122
Gain (loss) on marking to market	R$ 414
Currency / index	CDI
Maturity range	February 2,021
Notional	R$ 135000
Not Designated as Hedging Instrument [Member] | Interest Rate Hedge [Member] | Companhia Piratininga de Forca e Luz ("CPFL Piratininga") [Member] | Santander [Member]
Statement Line Items [Line Items]
Fair value (carrying amounts) - assets	402
Fair value (carrying amounts) - liabilities	0
The net fair value of financial assets and liabilities	402
The net value of derivative instruments at cost	91
Gain (loss) on marking to market	R$ 310
Currency / index	CDI
Maturity range	February 2,021
Notional	R$ 100000
Not Designated as Hedging Instrument [Member] | Interest Rate Hedge [Member] | CPFL Geracao de Energia S.A. ("CPFL Geracao") [Member] | Votorantim [Member]
Statement Line Items [Line Items]
Fair value (carrying amounts) - assets	2,088
Fair value (carrying amounts) - liabilities	0
The net fair value of financial assets and liabilities	2,088
The net value of derivative instruments at cost	403
Gain (loss) on marking to market	R$ 1685
Currency / index	CDI
Maturity range	August 2,020
Notional	R$ 460000
Not Designated as Hedging Instrument [Member] | Interest Rate Hedge [Member] | Rio Grande Energia S.A. ("RGE") [Member] | Votorantim [Member]
Statement Line Items [Line Items]
Fair value (carrying amounts) - assets	620
Fair value (carrying amounts) - liabilities	0
The net fair value of financial assets and liabilities	620
The net value of derivative instruments at cost	143
Gain (loss) on marking to market	R$ 477
Currency / index	CDI
Maturity range	February 2,021
Notional	R$ 170000
Not Designated as Hedging Instrument [Member] | Other Derivatives [Member]
Statement Line Items [Line Items]
Fair value (carrying amounts) - assets	52,058
Fair value (carrying amounts) - liabilities	0
The net fair value of financial assets and liabilities	52,058
The net value of derivative instruments at cost	0
Gain (loss) on marking to market	52,058
Not Designated as Hedging Instrument [Member] | Other Derivatives [Member] | CPFL Geracao de Energia S.A. ("CPFL Geracao") [Member] | Votorantim [Member]
Statement Line Items [Line Items]
Fair value (carrying amounts) - assets	14,948
Fair value (carrying amounts) - liabilities	0
The net fair value of financial assets and liabilities	14,948
The net value of derivative instruments at cost	0
Gain (loss) on marking to market	R$ 14948
Currency / index	dollar
Maturity range	September 2,020
Notional	R$ 19975
Not Designated as Hedging Instrument [Member] | Other Derivatives [Member] | CPFL Geracao de Energia S.A. ("CPFL Geracao") [Member] | Itau [Member]
Statement Line Items [Line Items]
Fair value (carrying amounts) - assets	18,126
Fair value (carrying amounts) - liabilities	0
The net fair value of financial assets and liabilities	18,126
The net value of derivative instruments at cost	0
Gain (loss) on marking to market	R$ 18126
Currency / index	dollar
Maturity range	September 2,020
Notional	R$ 19975
Not Designated as Hedging Instrument [Member] | Other Derivatives [Member] | CPFL Geracao de Energia S.A. ("CPFL Geracao") [Member] | Santander [Member]
Statement Line Items [Line Items]
Fair value (carrying amounts) - assets	18,984
Fair value (carrying amounts) - liabilities	0
The net fair value of financial assets and liabilities	18,984
The net value of derivative instruments at cost	0
Gain (loss) on marking to market	R$ 18984
Currency / index	dollar
Maturity range	September 2,020
Notional	R$ 25248

(33) FINANCIAL INSTRUMENTS (161

(33) FINANCIAL INSTRUMENTS (Details 2) - BRL (R$) R$ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Statement Line Items [Line Items]
Gain (Loss)	R$ 235852	R$ 1399988	R$ 1514439
Exchange Variation [Member] | CPFL Energia S.A. ("CPFL Energia") [Member]
Statement Line Items [Line Items]
Gain (Loss)	0	(76,202)	71,492
Exchange Variation [Member] | Companhia Paulista de Forca e Luz ("CPFL Paulista") [Member]
Statement Line Items [Line Items]
Gain (Loss)	(89,612)	(802,479)	843,224
Exchange Variation [Member] | Companhia Piratininga de Forca e Luz ("CPFL Piratininga") [Member]
Statement Line Items [Line Items]
Gain (Loss)	(19,799)	(358,412)	300,652
Exchange Variation [Member] | Rio Grande Energia S.A. ("RGE") [Member]
Statement Line Items [Line Items]
Gain (Loss)	(27,237)	(252,321)	291,612
Exchange Variation [Member] | CPFL Geracao de Energia S.A. ("CPFL Geracao") [Member]
Statement Line Items [Line Items]
Gain (Loss)	(41,793)	(145,933)	122,294
Exchange Variation [Member] | Companhia Luz e Forca Santa Cruz ("CPFL Santa Cruz") [Member]
Statement Line Items [Line Items]
Gain (Loss)	(947)	(6,986)	9,899
Exchange Variation [Member] | Companhia Leste Paulista de Energia ("CPFL Leste Paulista") [Member]
Statement Line Items [Line Items]
Gain (Loss)	(947)	(1,076)	4,596
Exchange Variation [Member] | Companhia Sul Paulista de Energia ("CPFL Sul Paulista") [Member]
Statement Line Items [Line Items]
Gain (Loss)	(947)	(7,577)	12,404
Exchange Variation [Member] | Companhia Jaguari de Energia ("CPFL Jaguari") [Member]
Statement Line Items [Line Items]
Gain (Loss)	(947)	(10,236)	16,616
Exchange Variation [Member] | Companhia Luz e Forca de Mococa ("CPFL Mococa") [Member]
Statement Line Items [Line Items]
Gain (Loss)	0	0	2,022
Exchange Variation [Member] | Paulista Lajeado Energia S.A. ("Paulista Lajeado") [Member]
Statement Line Items [Line Items]
Gain (Loss)	(2,052)	(11,046)	4,626
Exchange Variation [Member] | CPFL Telecom S.A ("CPFL Telecom") [Member]
Statement Line Items [Line Items]
Gain (Loss)	0	0	3,204
Exchange Variation [Member] | CPFL Comercializacao Brasil S.A. ("CPFL Brasil") [Member]
Statement Line Items [Line Items]
Gain (Loss)	14,567	(13,857)	5,367
Exchange Variation [Member] | CPFL Servicos, Equipamentos, Industria e Comercio S.A. ("CPFL Servicos") [Member]
Statement Line Items [Line Items]
Gain (Loss)	0	(3,420)	3,810
Mark to Market [Member] | CPFL Energia S.A. ("CPFL Energia") [Member]
Statement Line Items [Line Items]
Gain (Loss)	0	2,319	(2,319)
Mark to Market [Member] | Companhia Paulista de Forca e Luz ("CPFL Paulista") [Member]
Statement Line Items [Line Items]
Gain (Loss)	(25,410)	118,663	(98,738)
Mark to Market [Member] | Companhia Piratininga de Forca e Luz ("CPFL Piratininga") [Member]
Statement Line Items [Line Items]
Gain (Loss)	(18,999)	48,193	(32,431)
Mark to Market [Member] | Rio Grande Energia S.A. ("RGE") [Member]
Statement Line Items [Line Items]
Gain (Loss)	(10,679)	48,915	(29,946)
Mark to Market [Member] | CPFL Geracao de Energia S.A. ("CPFL Geracao") [Member]
Statement Line Items [Line Items]
Gain (Loss)	(6,033)	66,425	(7,896)
Mark to Market [Member] | Companhia Luz e Forca Santa Cruz ("CPFL Santa Cruz") [Member]
Statement Line Items [Line Items]
Gain (Loss)	120	148	(80)
Mark to Market [Member] | Companhia Leste Paulista de Energia ("CPFL Leste Paulista") [Member]
Statement Line Items [Line Items]
Gain (Loss)	120	(80)	(76)
Mark to Market [Member] | Companhia Sul Paulista de Energia ("CPFL Sul Paulista") [Member]
Statement Line Items [Line Items]
Gain (Loss)	120	170	(83)
Mark to Market [Member] | Companhia Jaguari de Energia ("CPFL Jaguari") [Member]
Statement Line Items [Line Items]
Gain (Loss)	120	273	(63)
Mark to Market [Member] | Companhia Luz e Forca de Mococa ("CPFL Mococa") [Member]
Statement Line Items [Line Items]
Gain (Loss)	0	0	(33)
Mark to Market [Member] | Paulista Lajeado Energia S.A. ("Paulista Lajeado") [Member]
Statement Line Items [Line Items]
Gain (Loss)	66	1,649	(1,675)
Mark to Market [Member] | CPFL Telecom S.A ("CPFL Telecom") [Member]
Statement Line Items [Line Items]
Gain (Loss)	0	0	6
Mark to Market [Member] | CPFL Comercializacao Brasil S.A. ("CPFL Brasil") [Member]
Statement Line Items [Line Items]
Gain (Loss)	(7,009)	2,383	(2,378)
Mark to Market [Member] | CPFL Servicos, Equipamentos, Industria e Comercio S.A. ("CPFL Servicos") [Member]
Statement Line Items [Line Items]
Gain (Loss)	0	254	(87)
Interest Rate Variation [Member] | Companhia Paulista de Forca e Luz ("CPFL Paulista") [Member]
Statement Line Items [Line Items]
Gain (Loss)	304	(1,423)	(2,250)
Interest Rate Variation [Member] | Companhia Piratininga de Forca e Luz ("CPFL Piratininga") [Member]
Statement Line Items [Line Items]
Gain (Loss)	175	(661)	(609)
Interest Rate Variation [Member] | Rio Grande Energia S.A. ("RGE") [Member]
Statement Line Items [Line Items]
Gain (Loss)	115	(835)	(1,321)
Interest Rate Variation [Member] | CPFL Geracao de Energia S.A. ("CPFL Geracao") [Member]
Statement Line Items [Line Items]
Gain (Loss)	R$ 852	R$ 3161	R$ 2600

(33) FINANCIAL INSTRUMENTS (162

(33) FINANCIAL INSTRUMENTS (Details 3) - BRL (R$) R$ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Statement Line Items [Line Items]
As of Beginning Year	R$ 57715	R$ 6380
Measurement at fair value	16,715	67,986
Net cash received from settlement of flows	(22,372)	(16,651)
As of Ending Year	52,058	57,715
Assets [Member]
Statement Line Items [Line Items]
As of Beginning Year	57,715	8,820
Measurement at fair value	16,715	65,546
Net cash received from settlement of flows	(22,372)	(16,651)
As of Ending Year	52,058	57,715
Liabilities [Member]
Statement Line Items [Line Items]
As of Beginning Year	0	(2,440)
Measurement at fair value	0	2,440
Net cash received from settlement of flows	0	0
As of Ending Year	R$ 0	R$ 0

(33) FINANCIAL INSTRUMENTS (163

(33) FINANCIAL INSTRUMENTS (Details 4) - Exchange Rate Hedge [Member] R$ in Thousands	12 Months Ended
	Dec. 31, 2017BRL (R$)
Financial Liability Instruments [Member]
Statement Line Items [Line Items]
Exposure	R$ 4641924
Decrease (increase) Currency depreciation	(209,785)
Decrease (increase) Currency appreciation / depreciation of 25%	1,003,142
Decrease (increase) Currency appreciation / depreciation of 50%	2,216,070
Derivatives - Plain Vanilla Swap [Member]
Statement Line Items [Line Items]
Exposure	4,687,768
Decrease (increase) Currency depreciation	211,857
Decrease (increase) Currency appreciation / depreciation of 25%	(1,013,050)
Decrease (increase) Currency appreciation / depreciation of 50%	(2,237,956)
Financial Liability Instruments & Derivatives - Plain Vanilla Swap [Member]
Statement Line Items [Line Items]
Exposure	R$ 45844
Risk	drop in the dollar
Decrease (increase) Currency depreciation	R$ 2072
Decrease (increase) Currency appreciation / depreciation of 25%	(9,908)
Decrease (increase) Currency appreciation / depreciation of 50%	(21,886)
Financial Liability Instruments [Member]
Statement Line Items [Line Items]
Exposure	(218,814)
Decrease (increase) Currency depreciation	(14,978)
Decrease (increase) Currency appreciation / depreciation of 25%	43,470
Decrease (increase) Currency appreciation / depreciation of 50%	101,918
Derivatives - Plain Vanilla Swap [Member]
Statement Line Items [Line Items]
Exposure	219,694
Decrease (increase) Currency depreciation	15,038
Decrease (increase) Currency appreciation / depreciation of 25%	(43,645)
Decrease (increase) Currency appreciation / depreciation of 50%	(102,328)
Financial Liability Instruments & Derivatives - Plain Vanilla Swap [Member]
Statement Line Items [Line Items]
Exposure	R$ 880
Risk	drop in the euro
Decrease (increase) Currency depreciation	R$ 60
Decrease (increase) Currency appreciation / depreciation of 25%	(175)
Decrease (increase) Currency appreciation / depreciation of 50%	(410)
Derivatives - Zero-cost collar [Member]
Statement Line Items [Line Items]
Exposure - US$ thousand	R$ 65197
Risk	dollar apprec.
Decrease (increase) Currency depreciation	R$ 56138
Decrease (increase) Currency appreciation / depreciation of 25%	(80,491)
Decrease (increase) Currency appreciation / depreciation of 50%	R$ 104844

(33) FINANCIAL INSTRUMENTS (164

(33) FINANCIAL INSTRUMENTS (Details 5) - Interest Rate Hedge [Member] R$ in Thousands	12 Months Ended
	Dec. 31, 2017BRL (R$)
Statement Line Items [Line Items]
Exposure	R$ 8229862
Decrease (increase) Scenario I	61,401
Decrease (increase) Raise/drop of index by 25%	(227,090)
Decrease (increase) Raise/drop of index by 50%	(515,580)
CDI [Member]
Statement Line Items [Line Items]
Exposure	R$ 9719308
Risk	CDI apprec.
Decrease (increase) Scenario I	R$ 7775
Decrease (increase) Raise/drop of index by 25%	(157,695)
Decrease (increase) Raise/drop of index by 50%	(323,167)
CDI [Member] | Financial Liability Instruments [Member]
Statement Line Items [Line Items]
Exposure	(8,988,008)
Decrease (increase) Scenario I	7,190
Decrease (increase) Raise/drop of index by 25%	(145,830)
Decrease (increase) Raise/drop of index by 50%	(298,851)
CDI [Member] | Derivatives - Plain Vanilla Swap [Member]
Statement Line Items [Line Items]
Exposure	(4,501,345)
Decrease (increase) Scenario I	3,601
Decrease (increase) Raise/drop of index by 25%	(73,034)
Decrease (increase) Raise/drop of index by 50%	(149,670)
CDI [Member] | Financial Asset Instruments [Member]
Statement Line Items [Line Items]
Exposure	3,770,045
Decrease (increase) Scenario I	(3,016)
Decrease (increase) Raise/drop of index by 25%	61,169
Decrease (increase) Raise/drop of index by 50%	125,354
IGP-M [Member] | Financial Liability Instruments [Member]
Statement Line Items [Line Items]
Exposure	R$ 57291
Risk	IGP-M apprec.
Decrease (increase) Scenario I	R$ 2286
Decrease (increase) Raise/drop of index by 25%	(2,783)
Decrease (increase) Raise/drop of index by 50%	(3,280)
TJLP [Member] | Financial Liability Instruments [Member]
Statement Line Items [Line Items]
Exposure	R$ 3944876
Risk	TJLP apprec.
Decrease (increase) Scenario I	R$ 9862
Decrease (increase) Raise/drop of index by 25%	(56,708)
Decrease (increase) Raise/drop of index by 50%	(123,277)
IPCA [Member]
Statement Line Items [Line Items]
Exposure	R$ 5114198
Risk	drop in the IPCA
Decrease (increase) Scenario I	R$ 56768
Decrease (increase) Raise/drop of index by 25%	7,287
Decrease (increase) Raise/drop of index by 50%	(42,192)
IPCA [Member] | Financial Liability Instruments [Member]
Statement Line Items [Line Items]
Exposure	(1,311,432)
Decrease (increase) Scenario I	(14,557)
Decrease (increase) Raise/drop of index by 25%	(1,869)
Decrease (increase) Raise/drop of index by 50%	10,819
IPCA [Member] | Derivatives - Plain Vanilla Swap [Member]
Statement Line Items [Line Items]
Exposure	94,949
Decrease (increase) Scenario I	1,054
Decrease (increase) Raise/drop of index by 25%	135
Decrease (increase) Raise/drop of index by 50%	(783)
IPCA [Member] | Concession financial asset
Statement Line Items [Line Items]
Exposure	6,330,681
Decrease (increase) Scenario I	70,271
Decrease (increase) Raise/drop of index by 25%	9,021
Decrease (increase) Raise/drop of index by 50%	(52,228)
SELIC [Member]
Statement Line Items [Line Items]
Exposure	R$ 377415
Risk	drop in the SELIC
Decrease (increase) Scenario I	R$ 10718
Decrease (increase) Raise/drop of index by 25%	(17,191)
Decrease (increase) Raise/drop of index by 50%	(23,664)
SELIC [Member] | Financial Liability Instruments [Member]
Statement Line Items [Line Items]
Exposure	(139,926)
Decrease (increase) Scenario I	3,974
Decrease (increase) Raise/drop of index by 25%	6,374
Decrease (increase) Raise/drop of index by 50%	8,773
SELIC [Member] | Sector Financial Asset and Liability [Member]
Statement Line Items [Line Items]
Exposure	517,341
Decrease (increase) Scenario I	(14,692)
Decrease (increase) Raise/drop of index by 25%	(23,565)
Decrease (increase) Raise/drop of index by 50%	R$ 32437

(33) FINANCIAL INSTRUMENTS (165

(33) FINANCIAL INSTRUMENTS (Details 6 ) R$ in Thousands	Dec. 31, 2017BRL (R$)
Statement Line Items [Line Items]
Financial liabilities	R$ 29019225
Less than 1 Month [Member]
Statement Line Items [Line Items]
Financial liabilities	4,586,608
1-3 Months [Member]
Statement Line Items [Line Items]
Financial liabilities	1,568,367
3 Months To 1 Year [Member]
Statement Line Items [Line Items]
Financial liabilities	4,500,694
1-3 Years [Member]
Statement Line Items [Line Items]
Financial liabilities	10,720,623
4-5 Years [Member]
Statement Line Items [Line Items]
Financial liabilities	3,530,892
More than 5 years [Member]
Statement Line Items [Line Items]
Financial liabilities	4,112,041
Liquidity Risk [Member] | Trade payables [Member]
Statement Line Items [Line Items]
Financial liabilities	3,676,787
Liquidity Risk [Member] | Trade payables [Member] | Less than 1 Month [Member]
Statement Line Items [Line Items]
Financial liabilities	3,524,624
Liquidity Risk [Member] | Trade payables [Member] | 1-3 Months [Member]
Statement Line Items [Line Items]
Financial liabilities	16,307
Liquidity Risk [Member] | Trade payables [Member] | 3 Months To 1 Year [Member]
Statement Line Items [Line Items]
Financial liabilities	7,418
Liquidity Risk [Member] | Trade payables [Member] | 1-3 Years [Member]
Statement Line Items [Line Items]
Financial liabilities	0
Liquidity Risk [Member] | Trade payables [Member] | 4-5 Years [Member]
Statement Line Items [Line Items]
Financial liabilities	0
Liquidity Risk [Member] | Trade payables [Member] | More than 5 years [Member]
Statement Line Items [Line Items]
Financial liabilities	R$ 128438
Liquidity Risk [Member] | Borrowings - principal and interest [Member]
Statement Line Items [Line Items]
Weighted average interest rates	7.95%
Financial liabilities	R$ 13362247
Liquidity Risk [Member] | Borrowings - principal and interest [Member] | Less than 1 Month [Member]
Statement Line Items [Line Items]
Financial liabilities	336,255
Liquidity Risk [Member] | Borrowings - principal and interest [Member] | 1-3 Months [Member]
Statement Line Items [Line Items]
Financial liabilities	947,051
Liquidity Risk [Member] | Borrowings - principal and interest [Member] | 3 Months To 1 Year [Member]
Statement Line Items [Line Items]
Financial liabilities	2,904,702
Liquidity Risk [Member] | Borrowings - principal and interest [Member] | 1-3 Years [Member]
Statement Line Items [Line Items]
Financial liabilities	5,267,176
Liquidity Risk [Member] | Borrowings - principal and interest [Member] | 4-5 Years [Member]
Statement Line Items [Line Items]
Financial liabilities	1,485,520
Liquidity Risk [Member] | Borrowings - principal and interest [Member] | More than 5 years [Member]
Statement Line Items [Line Items]
Financial liabilities	2,421,543
Liquidity Risk [Member] | Derivatives [Member]
Statement Line Items [Line Items]
Financial liabilities	106,781
Liquidity Risk [Member] | Derivatives [Member] | Less than 1 Month [Member]
Statement Line Items [Line Items]
Financial liabilities	39
Liquidity Risk [Member] | Derivatives [Member] | 1-3 Months [Member]
Statement Line Items [Line Items]
Financial liabilities	523
Liquidity Risk [Member] | Derivatives [Member] | 3 Months To 1 Year [Member]
Statement Line Items [Line Items]
Financial liabilities	14,160
Liquidity Risk [Member] | Derivatives [Member] | 1-3 Years [Member]
Statement Line Items [Line Items]
Financial liabilities	32,258
Liquidity Risk [Member] | Derivatives [Member] | 4-5 Years [Member]
Statement Line Items [Line Items]
Financial liabilities	59,801
Liquidity Risk [Member] | Derivatives [Member] | More than 5 years [Member]
Statement Line Items [Line Items]
Financial liabilities	R$ 0
Liquidity Risk [Member] | Debentures - principal and interest [Member]
Statement Line Items [Line Items]
Weighted average interest rates	7.83%
Financial liabilities	R$ 10790317
Liquidity Risk [Member] | Debentures - principal and interest [Member] | Less than 1 Month [Member]
Statement Line Items [Line Items]
Financial liabilities	35,930
Liquidity Risk [Member] | Debentures - principal and interest [Member] | 1-3 Months [Member]
Statement Line Items [Line Items]
Financial liabilities	544,995
Liquidity Risk [Member] | Debentures - principal and interest [Member] | 3 Months To 1 Year [Member]
Statement Line Items [Line Items]
Financial liabilities	1,541,223
Liquidity Risk [Member] | Debentures - principal and interest [Member] | 1-3 Years [Member]
Statement Line Items [Line Items]
Financial liabilities	5,378,610
Liquidity Risk [Member] | Debentures - principal and interest [Member] | 4-5 Years [Member]
Statement Line Items [Line Items]
Financial liabilities	1,938,783
Liquidity Risk [Member] | Debentures - principal and interest [Member] | More than 5 years [Member]
Statement Line Items [Line Items]
Financial liabilities	1,350,776
Liquidity Risk [Member] | Regulatory charges [Member]
Statement Line Items [Line Items]
Financial liabilities	581,600
Liquidity Risk [Member] | Regulatory charges [Member] | Less than 1 Month [Member]
Statement Line Items [Line Items]
Financial liabilities	581,600
Liquidity Risk [Member] | Regulatory charges [Member] | 1-3 Months [Member]
Statement Line Items [Line Items]
Financial liabilities	0
Liquidity Risk [Member] | Regulatory charges [Member] | 3 Months To 1 Year [Member]
Statement Line Items [Line Items]
Financial liabilities	0
Liquidity Risk [Member] | Regulatory charges [Member] | 1-3 Years [Member]
Statement Line Items [Line Items]
Financial liabilities	0
Liquidity Risk [Member] | Regulatory charges [Member] | 4-5 Years [Member]
Statement Line Items [Line Items]
Financial liabilities	0
Liquidity Risk [Member] | Regulatory charges [Member] | More than 5 years [Member]
Statement Line Items [Line Items]
Financial liabilities	R$ 0
Liquidity Risk [Member] | Use of public asset [Member]
Statement Line Items [Line Items]
Weighted average interest rates	9.24%
Financial liabilities	R$ 258357
Liquidity Risk [Member] | Use of public asset [Member] | Less than 1 Month [Member]
Statement Line Items [Line Items]
Financial liabilities	1,645
Liquidity Risk [Member] | Use of public asset [Member] | 1-3 Months [Member]
Statement Line Items [Line Items]
Financial liabilities	3,305
Liquidity Risk [Member] | Use of public asset [Member] | 3 Months To 1 Year [Member]
Statement Line Items [Line Items]
Financial liabilities	14,979
Liquidity Risk [Member] | Use of public asset [Member] | 1-3 Years [Member]
Statement Line Items [Line Items]
Financial liabilities	42,579
Liquidity Risk [Member] | Use of public asset [Member] | 4-5 Years [Member]
Statement Line Items [Line Items]
Financial liabilities	46,788
Liquidity Risk [Member] | Use of public asset [Member] | More than 5 years [Member]
Statement Line Items [Line Items]
Financial liabilities	149,061
Liquidity Risk [Member] | Others [Member]
Statement Line Items [Line Items]
Financial liabilities	243,136
Liquidity Risk [Member] | Others [Member] | Less than 1 Month [Member]
Statement Line Items [Line Items]
Financial liabilities	106,515
Liquidity Risk [Member] | Others [Member] | 1-3 Months [Member]
Statement Line Items [Line Items]
Financial liabilities	56,186
Liquidity Risk [Member] | Others [Member] | 3 Months To 1 Year [Member]
Statement Line Items [Line Items]
Financial liabilities	18,212
Liquidity Risk [Member] | Others [Member] | 1-3 Years [Member]
Statement Line Items [Line Items]
Financial liabilities	0
Liquidity Risk [Member] | Others [Member] | 4-5 Years [Member]
Statement Line Items [Line Items]
Financial liabilities	0
Liquidity Risk [Member] | Others [Member] | More than 5 years [Member]
Statement Line Items [Line Items]
Financial liabilities	62,223
Liquidity Risk [Member] | Consumers and concessionaires [Member]
Statement Line Items [Line Items]
Financial liabilities	137,541
Liquidity Risk [Member] | Consumers and concessionaires [Member] | Less than 1 Month [Member]
Statement Line Items [Line Items]
Financial liabilities	60,298
Liquidity Risk [Member] | Consumers and concessionaires [Member] | 1-3 Months [Member]
Statement Line Items [Line Items]
Financial liabilities	25,844
Liquidity Risk [Member] | Consumers and concessionaires [Member] | 3 Months To 1 Year [Member]
Statement Line Items [Line Items]
Financial liabilities	6,926
Liquidity Risk [Member] | Consumers and concessionaires [Member] | 1-3 Years [Member]
Statement Line Items [Line Items]
Financial liabilities	0
Liquidity Risk [Member] | Consumers and concessionaires [Member] | 4-5 Years [Member]
Statement Line Items [Line Items]
Financial liabilities	0
Liquidity Risk [Member] | Consumers and concessionaires [Member] | More than 5 years [Member]
Statement Line Items [Line Items]
Financial liabilities	44,473
Liquidity Risk [Member] | EPE / FNDCT / PROCEL [Member]
Statement Line Items [Line Items]
Financial liabilities	15,361
Liquidity Risk [Member] | EPE / FNDCT / PROCEL [Member] | Less than 1 Month [Member]
Statement Line Items [Line Items]
Financial liabilities	849
Liquidity Risk [Member] | EPE / FNDCT / PROCEL [Member] | 1-3 Months [Member]
Statement Line Items [Line Items]
Financial liabilities	3,226
Liquidity Risk [Member] | EPE / FNDCT / PROCEL [Member] | 3 Months To 1 Year [Member]
Statement Line Items [Line Items]
Financial liabilities	11,286
Liquidity Risk [Member] | EPE / FNDCT / PROCEL [Member] | 1-3 Years [Member]
Statement Line Items [Line Items]
Financial liabilities	0
Liquidity Risk [Member] | EPE / FNDCT / PROCEL [Member] | 4-5 Years [Member]
Statement Line Items [Line Items]
Financial liabilities	0
Liquidity Risk [Member] | EPE / FNDCT / PROCEL [Member] | More than 5 years [Member]
Statement Line Items [Line Items]
Financial liabilities	0
Liquidity Risk [Member] | Collections agreement [Member]
Statement Line Items [Line Items]
Financial liabilities	72,484
Liquidity Risk [Member] | Collections agreement [Member] | Less than 1 Month [Member]
Statement Line Items [Line Items]
Financial liabilities	45,368
Liquidity Risk [Member] | Collections agreement [Member] | 1-3 Months [Member]
Statement Line Items [Line Items]
Financial liabilities	27,116
Liquidity Risk [Member] | Collections agreement [Member] | 3 Months To 1 Year [Member]
Statement Line Items [Line Items]
Financial liabilities	0
Liquidity Risk [Member] | Collections agreement [Member] | 1-3 Years [Member]
Statement Line Items [Line Items]
Financial liabilities	0
Liquidity Risk [Member] | Collections agreement [Member] | 4-5 Years [Member]
Statement Line Items [Line Items]
Financial liabilities	0
Liquidity Risk [Member] | Collections agreement [Member] | More than 5 years [Member]
Statement Line Items [Line Items]
Financial liabilities	0
Liquidity Risk [Member] | Reversal fund [Member]
Statement Line Items [Line Items]
Financial liabilities	17,750
Liquidity Risk [Member] | Reversal fund [Member] | Less than 1 Month [Member]
Statement Line Items [Line Items]
Financial liabilities	0
Liquidity Risk [Member] | Reversal fund [Member] | 1-3 Months [Member]
Statement Line Items [Line Items]
Financial liabilities	0
Liquidity Risk [Member] | Reversal fund [Member] | 3 Months To 1 Year [Member]
Statement Line Items [Line Items]
Financial liabilities	0
Liquidity Risk [Member] | Reversal fund [Member] | 1-3 Years [Member]
Statement Line Items [Line Items]
Financial liabilities	0
Liquidity Risk [Member] | Reversal fund [Member] | 4-5 Years [Member]
Statement Line Items [Line Items]
Financial liabilities	0
Liquidity Risk [Member] | Reversal fund [Member] | More than 5 years [Member]
Statement Line Items [Line Items]
Financial liabilities	R$ 17750

(34) COMMITTMENTS (Details)

(34) COMMITTMENTS (Details) R$ in Thousands	12 Months Ended
	Dec. 31, 2017BRL (R$)
Statement Line Items [Line Items]
Total	R$ 147810330
Less than 1 year [Member]
Statement Line Items [Line Items]
Total	16,008,689
1-3 years [Member]
Statement Line Items [Line Items]
Total	29,049,391
4-5 years [Member]
Statement Line Items [Line Items]
Total	28,646,012
More than 5 years [Member]
Statement Line Items [Line Items]
Total	74,106,237
Operational leasings
Statement Line Items [Line Items]
Total	R$ 226241
Duration	Up to 15 years
Operational leasings | Less than 1 year [Member]
Statement Line Items [Line Items]
Total	R$ 16579
Operational leasings | 1-3 years [Member]
Statement Line Items [Line Items]
Total	29,440
Operational leasings | 4-5 years [Member]
Statement Line Items [Line Items]
Total	25,053
Operational leasings | More than 5 years [Member]
Statement Line Items [Line Items]
Total	155,169
Energy purchase agreements (except Itaipu) [Member]
Statement Line Items [Line Items]
Total	R$ 88092913
Duration	Up to 28 years
Energy purchase agreements (except Itaipu) [Member] | Less than 1 year [Member]
Statement Line Items [Line Items]
Total	R$ 10870752
Energy purchase agreements (except Itaipu) [Member] | 1-3 years [Member]
Statement Line Items [Line Items]
Total	18,433,971
Energy purchase agreements (except Itaipu) [Member] | 4-5 years [Member]
Statement Line Items [Line Items]
Total	17,250,704
Energy purchase agreements (except Itaipu) [Member] | More than 5 years [Member]
Statement Line Items [Line Items]
Total	41,537,486
Energy purchase from Itaipu [Member]
Statement Line Items [Line Items]
Total	R$ 24458379
Duration	Up to 28 years
Energy purchase from Itaipu [Member] | Less than 1 year [Member]
Statement Line Items [Line Items]
Total	R$ 2613587
Energy purchase from Itaipu [Member] | 1-3 years [Member]
Statement Line Items [Line Items]
Total	5,758,898
Energy purchase from Itaipu [Member] | 4-5 years [Member]
Statement Line Items [Line Items]
Total	6,599,478
Energy purchase from Itaipu [Member] | More than 5 years [Member]
Statement Line Items [Line Items]
Total	17,997,838
Energy system service charges [Member]
Statement Line Items [Line Items]
Total	R$ 32969801
Duration	Up to 32 years
Energy system service charges [Member] | Less than 1 year [Member]
Statement Line Items [Line Items]
Total	R$ 2613587
Energy system service charges [Member] | 1-3 years [Member]
Statement Line Items [Line Items]
Total	5,758,898
Energy system service charges [Member] | 4-5 years [Member]
Statement Line Items [Line Items]
Total	6,599,478
Energy system service charges [Member] | More than 5 years [Member]
Statement Line Items [Line Items]
Total	17,997,838
GSF renegotiation [Member]
Statement Line Items [Line Items]
Total	R$ 363755
Duration	Up to 30 years
GSF renegotiation [Member] | Less than 1 year [Member]
Statement Line Items [Line Items]
Total	R$ 26997
GSF renegotiation [Member] | 1-3 years [Member]
Statement Line Items [Line Items]
Total	13,267
GSF renegotiation [Member] | 4-5 years [Member]
Statement Line Items [Line Items]
Total	47,284
GSF renegotiation [Member] | More than 5 years [Member]
Statement Line Items [Line Items]
Total	276,207
Power plant constrution projects [Member]
Statement Line Items [Line Items]
Total	R$ 108495
Duration	Up to 3 years
Power plant constrution projects [Member] | Less than 1 year [Member]
Statement Line Items [Line Items]
Total	R$ 97176
Power plant constrution projects [Member] | 1-3 years [Member]
Statement Line Items [Line Items]
Total	11,319
Power plant constrution projects [Member] | 4-5 years [Member]
Statement Line Items [Line Items]
Total	0
Power plant constrution projects [Member] | More than 5 years [Member]
Statement Line Items [Line Items]
Total	0
Trade payables [Member]
Statement Line Items [Line Items]
Total	R$ 1590746
Duration	Up to 17 years
Trade payables [Member] | Less than 1 year [Member]
Statement Line Items [Line Items]
Total	R$ 102441
Trade payables [Member] | 1-3 years [Member]
Statement Line Items [Line Items]
Total	237,673
Trade payables [Member] | 4-5 years [Member]
Statement Line Items [Line Items]
Total	244,851
Trade payables [Member] | More than 5 years [Member]
Statement Line Items [Line Items]
Total	R$ 1005781

(35) NON-CASH TRANSACTION (Deta

(35) NON-CASH TRANSACTION (Details) - BRL (R$) R$ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Transactions resulting from business combinations
Borrowings and debentures	R$ 0	R$ 1156621	R$ 0
Concession financial asset	(12,338)	876,281	0
Intangible assets	(22,165)	1,870,268	0
Property, plant and equipment acquired	(4,800)	0	0
Other net assets acquired	0	(1,911)	0
Total transactions resulting from business combinations	(39,303)	1,591,839	0
Cash and cash equivalents acquired in the business combination	0	(95,164)	0
Consideration paid in the acquisition, net	(39,303)	1,496,675	0
Other transactions
Capital increase through earnings reserve	0	392,272	554,888
Escrow deposits to property, plant and equipment	4	3,418	0
Interest capitalized in property, plant and equipment	29,817	54,733	34,212
Interest capitalized in concession financial asset - distribution infrastructure	20,726	13,349	11,358
Reversal of contingencies against intangible assets	0	7,591	0
Repayment of intercompany loans with noncontrolling shareholders' dividends	259	0	0
Provision for socio environmental costscapitalized in property, plant and equipment	41,213	0	0
Transfers between property, plant and equipment and other assets	R$ 32600	R$ 14592	R$ 2928

(36) RELEVANT FACT AND EVENT168

(36) RELEVANT FACT AND EVENTS AFTER THE REPORTING PERIOD (Details) - Non-convertible debentures [Member] - Issued in January 2018 [Member] R$ in Thousands	12 Months Ended
	Dec. 31, 2017BRL (R$)shares
Companhia Paulista de Forca e Luz ("CPFL Paulista") [Member]
Statement Line Items [Line Items]
Issue	9th issue - single series
Quantity issued | shares	1,380,000
Amount | R$	R$ 1380000
Maturity	January 2,021
Interest	Semiannual
Utilization	Working capital improvement
Companhia Piratininga de Forca e Luz ("CPFL Piratininga") [Member]
Statement Line Items [Line Items]
Issue	9th issue - single series
Quantity issued | shares	215,000
Amount | R$	R$ 215000
Maturity	January 2,021
Interest	Semiannual
Utilization	Working capital improvement
Rio Grande Energia S.A. ("RGE") [Member]
Statement Line Items [Line Items]
Issue	9th issue - single series
Quantity issued | shares	220,000
Amount | R$	R$ 220000
Maturity	January 2,021
Interest	Semiannual
Utilization	Working capital improvement
Companhia Luz e Forca Santa Cruz ("CPFL Santa Cruz") [Member]
Statement Line Items [Line Items]
Issue	2nd issue - single series
Quantity issued | shares	190,000
Amount | R$	R$ 190000
Maturity	January 2,021
Interest	Semiannual
Utilization	Working capital improvement
CPFL Geracao de Energia S.A. ("CPFL Geracao") [Member]
Statement Line Items [Line Items]
Issue	10th issue - single series
Quantity issued | shares	190,000
Amount | R$	R$ 190000
Maturity	December 2,018
Interest	Semiannual
Utilization	Working capital improvement
CPFL Comercializacao Brasil S.A. ("CPFL Brasil") [Member]
Statement Line Items [Line Items]
Issue	4th issue - single series
Quantity issued | shares	115,000
Amount | R$	R$ 115000
Maturity	January 2,019
Interest	Semiannual
Utilization	Working capital improvement
RGE Sul Distribuidora de Energia S.A. ("RGE Sul") [Member]
Statement Line Items [Line Items]
Issue	6th issue - single series
Quantity issued | shares	520,000
Amount | R$	R$ 300000
Maturity	December 2,020
Interest	Semiannual
Utilization	Working capital improvement

(37) CONDENSED UNCONSOLIDATE169

(37) CONDENSED UNCONSOLIDATED FINANCIAL INFORMATION (Details) - BRL (R$) R$ in Thousands	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
ASSETS
Cash and cash equivalents	R$ 3249642	R$ 6164997	R$ 5682802	R$ 4357455
Other receivables	900,498	797,181
Total current assets	9,581,212	11,379,187
Deferred tax assets	943,199	922,858
Investments	1,001,550	1,493,753
Other receivables	840,192	766,253
Total noncurrent assets	31,701,701	30,791,805
Total assets	41,282,912	42,170,992	40,532,471
LIABILITIES
Other payables	961,306	807,623
Total current liabilities	11,378,688	9,018,492
Debentures	7,473,454	7,452,672
Other payables	426,890	309,292
Total noncurrent liabilities	18,717,881	22,779,832
Equity attributable to the owners of the company	8,961,528	7,970,021
Total liabilities and equity	41,282,912	42,170,992
Unconsolidated [member]
ASSETS
Cash and cash equivalents	6,581	64,973	R$ 424192	R$ 799775
Dividends and interest on capital	204,807	642,978
Other receivables	63,993	83,064
Total current assets	275,382	791,016
Deferred tax assets	145,779	171,073
Investments	8,557,673	7,866,100
Other receivables	484,814	80,775
Total noncurrent assets	9,188,266	8,117,948
Total assets	9,463,648	8,908,964
LIABILITIES
Debentures	1,938	15,334
Dividends and interest on capital	281,919	218,630
Other payables	19,955	21,791
Total current liabilities	303,812	255,755
Debentures	184,388	612,251
Provision for tax, civil and labor risks	600	1,008
Allowance for equity investment losses	0	19,302
Other payables	13,320	50,628
Total noncurrent liabilities	198,308	683,188
Equity attributable to the owners of the company	8,961,528	7,970,021
Total liabilities and equity	R$ 9463648	R$ 8908964

(37) CONDENSED UNCONSOLIDATE170

(37) CONDENSED UNCONSOLIDATED FINANCIAL INFORMATION (Details 1) - BRL (R$) R$ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Statement Line Items [Line Items]
Net operating revenue	R$ 26744905	R$ 19112089	R$ 20599212
General and administrative expenses	947,072	849,416	863,499
Income from electric energy service	3,021,834	2,522,608	2,645,434
Equity interests in subsidiaries, associates and joint ventures	312,390	311,414	216,885
Finance income (expense)	(1,487,554)	(1,453,474)	(1,407,863)
Profit before taxes	1,846,670	1,380,547	1,454,454
Profit attributable to the owners of the Company	1,179,750	900,885	864,940
Unconsolidated [member]
Statement Line Items [Line Items]
Net operating revenue	1	1,713	1,157
General and administrative expenses	(42,771)	(50,860)	(29,911)
Income from electric energy service	(42,770)	(49,147)	(28,754)
Equity interests in subsidiaries, associates and joint ventures	1,349,766	922,362	926,951
Finance income (expense)	(56,471)	17,183	(22,948)
Profit before taxes	1,250,525	890,398	875,250
Social contribution and income tax	(70,775)	10,487	(10,309)
Profit attributable to the owners of the Company	R$ 1179750	R$ 900885	R$ 864940

(37) CONDENSED UNCONSOLIDATE171

(37) CONDENSED UNCONSOLIDATED FINANCIAL INFORMATION (Details 2) - BRL (R$) R$ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Statement Line Items [Line Items]
Profit for the year	R$ 1179750	R$ 900885	R$ 864940
Total comprehensive income for the year	1,275,750	506,709	930,488
Unconsolidated [member]
Statement Line Items [Line Items]
Profit for the year	1,179,750	900,885	864,940
Items that will not be reclassified subsequently to profit and loss Equity in comprehensive income of subsidiaries	96,000	(394,175)	65,547
Total comprehensive income for the year	R$ 1275750	R$ 506709	R$ 930488

(37) CONDENSED UNCONSOLIDATE172

(37) CONDENSED UNCONSOLIDATED FINANCIAL INFORMATION (Details 3) - BRL (R$) R$ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
OPERATING CASH FLOW
Profit before taxes	R$ 1846670	R$ 1380547	R$ 1454454
ADJUSTMENT TO RECONCILE PROFIT TO CASH FROM OPERATING ACTIVITIES
Depreciation and amortization	1,529,052	1,291,165	1,279,902
Interest on debts, inflation adjustment and exchange rate changes	1,863,311	2,052,959	1,519,819
ADJUSTMENT TO RECONCILE PROFIT TO CASH FROM OPERATING ACTIVITIES	5,506,768	5,015,992	4,551,470
DECREASE (INCREASE) IN OPERATING ASSETS AND LIABILITIES
Dividends and interest on capital received	730,178	83,356	24,050
CASH FLOWS PROVIDED BY OPERATIONS	4,218,652	7,080,894	4,429,684
Interest paid on debts and debentures	(1,846,453)	(1,570,985)	(1,595,649)
Income tax and social contribution paid	(338,175)	(875,883)	(276,061)
NET CASH FROM OPERATING ACTIVITIES	2,034,024	4,634,026	2,557,974
INVESTING ACTIVITIES
NET CASH USED IN INVESTING ACTIVITIES	(2,509,321)	(3,815,219)	(1,524,894)
FINANCING ACTIVITIES
Dividends and interest on capital paid	336,934	231,749	5,204
NET CASH GENERATED BY (USED IN) FINANCING ACTIVITIES	(2,440,057)	(336,612)	292,267
NET INCREASE IN CASH AND CASH EQUIVALENTS	(2,915,354)	482,195	1,325,347
CASH AND CASH EQUIVALENTS AT THE BEGINNING OF THE YEAR	6,164,997	5,682,802	4,357,455
CASH AND CASH EQUIVALENTS AT THE END OF THE YEAR	3,249,642	6,164,997	5,682,802
Unconsolidated [member]
OPERATING CASH FLOW
Profit before taxes	1,250,525	890,398	875,250
ADJUSTMENT TO RECONCILE PROFIT TO CASH FROM OPERATING ACTIVITIES
Depreciation and amortization	217	193	170
Provision for tax, civil and labor risks	61	425	1,497
Interest on debts, inflation adjustment and exchange rate changes	61,520	42,395	94,588
Equity interests in subsidiaries, associates and joint ventures	(1,349,766)	(922,362)	(926,951)
ADJUSTMENT TO RECONCILE PROFIT TO CASH FROM OPERATING ACTIVITIES	(37,443)	11,049	44,553
DECREASE (INCREASE) IN OPERATING ASSETS AND LIABILITIES
Dividends and interest on capital received	1,172,336	1,606,073	627,014
Taxes recoverable	65,182	3,261	(12,350)
Other operating assets and liabilities	(19,043)	8,459	(2,526)
CASH FLOWS PROVIDED BY OPERATIONS	1,181,032	1,628,842	656,691
Interest paid on debts and debentures	(71,844)	(45,470)	(36,858)
Income tax and social contribution paid	(47,438)	(27,117)	(2,172)
NET CASH FROM OPERATING ACTIVITIES	1,061,750	1,556,255	617,661
INVESTING ACTIVITIES
Capital increase in investees	(9,400)	0	(490,010)
Advance for future capital increases	(383,340)	(1,384,520)	(52,680)
Other investing activities	(72,435)	(42,178)	10,298
NET CASH USED IN INVESTING ACTIVITIES	(465,175)	(1,426,698)	(532,392)
FINANCING ACTIVITIES
Borrowings and debentures raised	0	609,060	829,997
Repayment of principal of borrowings and debentures	(434,000)	(888,408)	(1,290,000)
Repayment of derivatives	0	(4,711)	0
Dividends and interest on capital paid	(220,966)	(204,717)	(850)
NET CASH GENERATED BY (USED IN) FINANCING ACTIVITIES	(654,966)	(488,776)	(460,853)
NET INCREASE IN CASH AND CASH EQUIVALENTS	(58,390)	(359,219)	(375,584)
CASH AND CASH EQUIVALENTS AT THE BEGINNING OF THE YEAR	64,973	424,192	799,775
CASH AND CASH EQUIVALENTS AT THE END OF THE YEAR	R$ 6581	R$ 64973	R$ 424192

(37) CONDENSED UNCONSOLIDATE173

(37) CONDENSED UNCONSOLIDATED FINANCIAL INFORMATION (Details 4) - BRL (R$) R$ in Thousands	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Statement Line Items [Line Items]
Bank balances	R$ 365031	R$ 170884
Total	3,249,642	6,164,997	R$ 5682802	R$ 4357455
Unconsolidated [member]
Statement Line Items [Line Items]
Bank balances	508	426
Investment funds	6,073	64,548
Total	R$ 6581	R$ 64973	R$ 424192	R$ 799775

(37) CONDENSED UNCONSOLIDATE174

(37) CONDENSED UNCONSOLIDATED FINANCIAL INFORMATION (Details 5) - Unconsolidated [member] - BRL (R$) R$ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Statement Line Items [Line Items]
Dividend	R$ 170461	R$ 622459
Interest on capital	34,344	20,516
Total	204,807	642,978
Companhia Paulista de Forca e Luz ("CPFL Paulista") [Member]
Statement Line Items [Line Items]
Dividend	49,798	0
Total	49,798	0
Companhia Piratininga de Forca e Luz ("CPFL Piratininga") [Member]
Statement Line Items [Line Items]
Dividend	0	72,080
Interest on capital	0	0
Total	0	72,080
Companhia Sul Paulista de Energia ("CPFL Sul Paulista") [Member]
Statement Line Items [Line Items]
Dividend	0	8,641
Interest on capital	0	1,986
Total	0	10,627
Rio Grande Energia S.A. ("RGE") [Member]
Statement Line Items [Line Items]
Dividend	50,319	24,672
Interest on capital	0	0
Total	50,319	24,672
CPFL Geracao de Energia S.A. ("CPFL Geracao") [Member]
Statement Line Items [Line Items]
Dividend	0	396,086
Interest on capital	0	0
Total	0	396,086
CPFL Centrais Geradoras ("CPFL Centrais Geradoras") [Member]
Statement Line Items [Line Items]
Dividend	17	0
Interest on capital	0	0
Total	17	0
CPFL Jaguari de Geracao de Energia Ltda ("CPFL Jaguari Geracao") [Member]
Statement Line Items [Line Items]
Dividend	0	1,664
Interest on capital	0	0
Total	0	1,664
CPFL Comercializacao Brasil S.A. ("CPFL Brasil") [Member]
Statement Line Items [Line Items]
Dividend	20,748	86,020
Interest on capital	2,361	1,650
Total	23,109	87,671
CPFL Planalto Ltda. ("CPFL Planalto") [Member]
Statement Line Items [Line Items]
Dividend	888	0
Interest on capital	0	0
Total	888	0
CPFL Atende Centro de Contatos e Atendimento Ltda. ("CPFL Atende") [Member]
Statement Line Items [Line Items]
Dividend	1,003	1,953
Interest on capital	620	554
Total	1,623	2,507
NECT Servicos Administrativos Ltda ("Nect") [Member]
Statement Line Items [Line Items]
Dividend	4,348	5,600
Interest on capital	0	0
Total	4,348	5,600
CPFL Eficiencia Energetica S.A ("CPFL ESCO") [Member]
Statement Line Items [Line Items]
Dividend	12,195	9,565
Interest on capital	17,404	16,325
Total	29,599	25,891
TI Nect Servicos de Informatica Ltda. ("Authi") [Member]
Statement Line Items [Line Items]
Dividend	6,228	10,064
Interest on capital	0	0
Total	6,228	10,064
Companhia Luz e Forca Santa Cruz [Member]
Statement Line Items [Line Items]
Dividend	24,918	6,115
Interest on capital	13,960	0
Total	R$ 38878	R$ 6115

(37) CONDENSED UNCONSOLIDATE175

(37) CONDENSED UNCONSOLIDATED FINANCIAL INFORMATION (Details 6) - BRL (R$) R$ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Current
Income tax and social contribution recoverable	R$ 88802	R$ 143943
Other taxes recoverable	306,244	259,905
Total	900,498	797,181
Noncurrent
Income tax and social contribution recoverable	61,464	65,535
Other taxes recoverable	171,980	132,751
Total	840,192	766,253
Unconsolidated [member]
Current
Income tax and social contribution recoverable	17,051	53,246
Other taxes recoverable	46,699	29,590
Associates and subsidiaries	0	0
Escrow deposits	0	0
Advance for future capital increase	0	0
Loans and financing guarantees of subsidiaries	0	0
Others	243	229
Total	63,993	83,064
Noncurrent
Income tax and social contribution recoverable	0	0
Other taxes recoverable	0	0
Associates and subsidiaries	127,147	52,582
Escrow deposits	665	710
Advance for future capital increase	350,000	0
Loans and financing guarantees of subsidiaries	5,761	26,261
Others	1,241	1,223
Total	R$ 484814	R$ 80775

(37) CONDENSED UNCONSOLIDATE176

(37) CONDENSED UNCONSOLIDATED FINANCIAL INFORMATION (Details 7) - BRL (R$) R$ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Statement Line Items [Line Items]
Total	R$ 943199	R$ 922858
Unconsolidated [member]
Statement Line Items [Line Items]
Total	145,779	171,073
Unconsolidated [member] | Tax losses carryforwards [member]
Statement Line Items [Line Items]
Total	38,216	42,841
Unconsolidated [member] | Temporary nondeductible differences [member]
Statement Line Items [Line Items]
Total	(408)	1,125
Unconsolidated [member] | Subtotal [member]
Statement Line Items [Line Items]
Total	37,808	43,966
Unconsolidated [member] | Tax losses carryforwards [member]
Statement Line Items [Line Items]
Total	109,103	123,980
Unconsolidated [member] | Temporary nondeductible differences [member]
Statement Line Items [Line Items]
Total	(1,132)	3,126
Unconsolidated [member] | Subtotal [member]
Statement Line Items [Line Items]
Total	R$ 107971	R$ 127106

(37) CONDENSED UNCONSOLIDATE177

(37) CONDENSED UNCONSOLIDATED FINANCIAL INFORMATION (Details 8) - BRL (R$) R$ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Statement Line Items [Line Items]
Number of shares		R$ 467	R$ 7
Equity interest	R$ 7837770	7,148,112
Share of profit (loss) of investees	(1,410,685)	(985,074)	(1,035,703)
Amortization of fair value adjustments of assets	(60,918)	(62,713)	(108,754)
Share of profit (loss) of investees, net of amortization of fair value adjustments of assets	1,349,766	922,362	926,950
Investment	7,804,429	5,811,894
Advances for future capital increases	33,340	1,355,520
Allowance for equity investment losses	0	(19,302)
Companhia Paulista de Forca e Luz ("CPFL Paulista") [Member]
Statement Line Items [Line Items]
Equity interest	1,370,403	1,063,400
Share of profit (loss) of investees	(280,354)	(255,329)	(298,203)
Companhia Piratininga de Forca e Luz ("CPFL Piratininga") [Member]
Statement Line Items [Line Items]
Equity interest	461,059	355,755
Share of profit (loss) of investees	(152,080)	(68,114)	(211,637)
Companhia Leste Paulista de Energia ("CPFL Leste Paulista") [Member]
Statement Line Items [Line Items]
Equity interest	0	52,853
Share of profit (loss) of investees	(9,589)	(10,731)	(13,556)
Companhia Sul Paulista de Energia ("CPFL Sul Paulista") [Member]
Statement Line Items [Line Items]
Equity interest	0	58,895
Share of profit (loss) of investees	(10,545)	(8,455)	(16,201)
Companhia Luz e Forca de Mococa ("CPFL Mococa") [Member]
Statement Line Items [Line Items]
Equity interest	0	33,824
Share of profit (loss) of investees	(6,999)	(9,198)	(6,679)
Rio Grande Energia S.A. ("RGE") [Member]
Statement Line Items [Line Items]
Equity interest	1,680,334	1,614,320
Share of profit (loss) of investees	(117,700)	(102,647)	(145,804)
RGE Sul Distribuidora de Energia S.A. ("RGE Sul") [Member]
Statement Line Items [Line Items]
Equity interest	1,228,317	0
Share of profit (loss) of investees	(57,305)	0	0
CPFL Geracao de Energia S.A. ("CPFL Geracao") [Member]
Statement Line Items [Line Items]
Equity interest	2,354,115	2,158,384
Share of profit (loss) of investees	(594,026)	(401,148)	(240,520)
CPFL Jaguari de Geracao de Energia Ltda ("CPFL Jaguari Geracao") [Member]
Statement Line Items [Line Items]
Equity interest	50,970	45,099
Share of profit (loss) of investees	(15,709)	(6,655)	(6,670)
CPFL Comercializacao Brasil S.A. ("CPFL Brasil") [Member]
Statement Line Items [Line Items]
Equity interest	96,093	109,054
Share of profit (loss) of investees	(94,455)	(104,235)	(81,929)
CPFL Planalto Ltda. ("CPFL Planalto") [Member]
Statement Line Items [Line Items]
Equity interest	3,293	2,101
Share of profit (loss) of investees	(3,550)	(2,476)	(1,830)
CPFL Servicos, Equipamentos, Industria e Comercio S.A. ("CPFL Servicos") [Member]
Statement Line Items [Line Items]
Equity interest	105,105	97,968
Share of profit (loss) of investees	12,863	8,175	17,952
CPFL Atende Centro de Contatos e Atendimento Ltda. ("CPFL Atende") [Member]
Statement Line Items [Line Items]
Equity interest	19,338	17,150
Share of profit (loss) of investees	(7,128)	(5,833)	(7,776)
NECT Servicos Administrativos Ltda ("Nect") [Member]
Statement Line Items [Line Items]
Equity interest	15,515	10,295
Share of profit (loss) of investees	(17,392)	(13,424)	(18,155)
CPFL Total Servicos Administrativos Ltda. ("CPFL Total") [Member]
Statement Line Items [Line Items]
Equity interest	20,624	27,570
Share of profit (loss) of investees	(20,865)	(12,817)	(5,836)
CPFL Jaguariuna Participacoes Ltda ("CPFL Jaguariuna") [Member]
Statement Line Items [Line Items]
Equity interest	0	1,256,161
Share of profit (loss) of investees	8,360	35,498	(167)
CPFL Telecom S.A ("CPFL Telecom") [Member]
Statement Line Items [Line Items]
Equity interest	2,018	(19,302)
Share of profit (loss) of investees	14,021	33,333	60,718
CPFL Centrais Geradoras Ltda. ("CPFL Centrais Geradoras") [Member]
Statement Line Items [Line Items]
Equity interest	16,177	15,459
Share of profit (loss) of investees	(735)	(958)	(4,740)
CPFL Eficiencia Energetica S.A ("CPFL ESCO") [Member]
Statement Line Items [Line Items]
Equity interest	55,252	61,543
Share of profit (loss) of investees	2,582	(5,926)	(35,194)
TI Nect Servicos de Informatica Ltda. ("Authi") [Member]
Statement Line Items [Line Items]
Equity interest	18,694	16,810
Share of profit (loss) of investees	(24,912)	(24,264)	(2,537)
Companhia Luz e Forca Santa Cruz [Member]
Statement Line Items [Line Items]
Equity interest	0	140,520
Share of profit (loss) of investees	(23,447)	(23,797)	(12,424)
Companhia Jaguari de Energia ( "CPFL Santa Cruz") [Member]
Statement Line Items [Line Items]
Equity interest	340,463	30,255
Share of profit (loss) of investees	R$ 11720	R$ 7988	R$ 4852

(37) CONDENSED UNCONSOLIDATE178

(37) CONDENSED UNCONSOLIDATED FINANCIAL INFORMATION (Details 9) - Unconsolidated [member] - BRL (R$) R$ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Statement Line Items [Line Items]
TOTAL	R$ 1172336	R$ 1606073	R$ 627014
Companhia Paulista de Forca e Luz ("CPFL Paulista") [Member]
Statement Line Items [Line Items]
TOTAL	2,228	948,624	425,400
Companhia Piratininga de Forca e Luz ("CPFL Piratininga") [Member]
Statement Line Items [Line Items]
TOTAL	112,638	267,647	0
Companhia Luz e Forca Santa Cruz ("CPFL Santa Cruz") [Member]
Statement Line Items [Line Items]
TOTAL	8,427	40,009	0
Companhia Leste Paulista de Energia ("CPFL Leste Paulista") [Member]
Statement Line Items [Line Items]
TOTAL	4,449	9,242	0
Companhia Jaguari de Energia ("CPFL Jaguari") [Member]
Statement Line Items [Line Items]
TOTAL	0	1,291	806
Companhia Luz e Forca de Mococa ("CPFL Mococa") [Member]
Statement Line Items [Line Items]
TOTAL	0	7,991	0
Rio Grande Energia S.A. ("RGE") [Member]
Statement Line Items [Line Items]
TOTAL	24,672	172,432	113,012
CPFL Geracao de Energia S.A. ("CPFL Geracao") [Member]
Statement Line Items [Line Items]
TOTAL	779,533	110,532	0
CPFL Comercializacao Brasil S.A. ("CPFL Brasil") [Member]
Statement Line Items [Line Items]
TOTAL	166,695	1,601	52,599
CPFL Jaguari de Geracao de Energia Ltda ("CPFL Jaguari Geracao") [Member]
Statement Line Items [Line Items]
TOTAL	11,061	4,288	998
CPFL Planalto Ltda. ("CPFL Planalto") [Member]
Statement Line Items [Line Items]
TOTAL	1,471	2,835	1,002
CPFL Servicos, Equipamentos, Industria e Comercio S.A. ("CPFL Servicos") [Member]
Statement Line Items [Line Items]
TOTAL	0	0	7,683
CPFL Atende Centro de Contatos e Atendimento Ltda. ("CPFL Atende") [Member]
Statement Line Items [Line Items]
TOTAL	5,666	3,382	7,899
CPFL Total Servicos Administrativos Ltda. ("CPFL Total") [Member]
Statement Line Items [Line Items]
TOTAL	17,810	10,767	4,734
NECT Servicos Administrativos Ltda ("Nect") [Member]
Statement Line Items [Line Items]
TOTAL	13,424	18,155	10,780
CPFL Geracao de Energia S.A. ("CPFL Geracao") [Member]
Statement Line Items [Line Items]
TOTAL	0	4,740	1,720
CPFL Eficiencia Energetica S.A ("CPFL ESCO") [Member]
Statement Line Items [Line Items]
TOTAL	0	0	380
TI Nect Servicos de Informatica Ltda. ("Authi") [Member]
Statement Line Items [Line Items]
TOTAL	R$ 24264	R$ 2537	R$ 0

(37) CONDENSED UNCONSOLIDATE179

(37) CONDENSED UNCONSOLIDATED FINANCIAL INFORMATION (Details 10) - 5th Issue [Member] - BRL (R$) R$ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Statement Line Items [Line Items]
5th Issue	Single series
Current and noncurrent interest	R$ 2817	R$ 18069
Noncurrent principal	186,000	620,000
Total	R$ 188817	R$ 638069