Clearway Energy (CWEN.A) 10-Q 9 Aug 16 2016 Q2 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2016	Jul. 31, 2016
Class of Stock [Line Items]
Entity Registrant Name	NRG Yield LLC
Entity Central Index Key	1,637,757
Document Type	10-Q
Document Period End Date	Jun. 30, 2016
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Entity Current Reporting Status	Yes
Entity Filer Category	Non-accelerated Filer
Entity Voluntary Filers	No
Entity Well-known Seasoned Issuer	Yes
Document Fiscal Year Focus	2,016
Document Fiscal Period Focus	Q2
Common Class A [Member]
Class of Stock [Line Items]
Entity Common Stock, Shares Outstanding		34,586,250
Common Class B [Member]
Class of Stock [Line Items]
Entity Common Stock, Shares Outstanding		42,738,750
Common Class C [Member]
Class of Stock [Line Items]
Entity Common Stock, Shares Outstanding		62,784,250
Common Class D [Member]
Class of Stock [Line Items]
Entity Common Stock, Shares Outstanding		42,738,750

Condensed Consolidated Statemen

Condensed Consolidated Statements of Operations - USD ($) $ in Millions		3 Months Ended				6 Months Ended
		Jun. 30, 2016		Jun. 30, 2015		Jun. 30, 2016		Jun. 30, 2015
Operating Revenues
Total operating revenues		$ 258		$ 235	[1],[2]	$ 478		$ 435	[1],[2]
Operating Costs and Expenses [Abstract]
Cost of operations		75		75	[1]	158		159	[1]
Depreciation and amortization		67		70	[1],[2]	133		137	[1],[2],[3]
General and administrative		3		3	[1],[2]	5		6	[1],[2]
Acquisition-related transaction and integration costs		0		1	[1],[2]	0		1	[1],[2]
Total operating costs and expenses		145		149	[1]	296		303	[1]
Operating Income		113		86	[1],[2]	182		132	[1],[2]
Costs and Expenses [Abstract]
Equity in earnings of unconsolidated affiliates		18		8	[1],[2]	20		10	[1],[2],[3]
Other income, net		1		0	[1]	1		1	[1],[2]
Gains (Losses) on Extinguishment of Debt		0		(7)	[1],[2]	0		(7)	[1],[2],[3]
Interest expense		(58)		(43)	[1],[2]	(124)		(115)	[1],[2]
Total other expense, net		(39)		(42)	[1]	(103)		(111)	[1]
Net Income		74		44	[1],[2]	79		21	[1],[2],[3]
Less: Net loss attributable to noncontrolling interests		(15)		(11)	[1]	(26)		(16)	[1]
Net Income Attributable to NRG Yield LLC		89		55	[1]	105		37	[1]
Consolidation, Eliminations [Member]
Operating Revenues
Total operating revenues		0	[4]	0	[5],[6]	0	[4]	0	[5],[6]
Operating Costs and Expenses [Abstract]
Cost of operations		0	[4]	0	[5],[6]	0	[4]	0	[5],[6]
Depreciation and amortization		0	[4]	0	[5],[6]	0	[4]	0	[5],[6]
General and administrative		0	[4]	0	[5],[6]	0	[4]	0	[5],[6]
Acquisition-related transaction and integration costs	[5],[6]			0				0
Total operating costs and expenses		0	[4]	0	[5],[6]	0	[4]	0	[5],[6]
Operating Income		0	[4]	0	[5],[6]	0	[4]	0	[5],[6]
Costs and Expenses [Abstract]
Equity in earnings of unconsolidated affiliates		0	[4]	0	[5],[6]	0	[4]	0	[5],[6]
Other income, net		0	[4]			0	[4]	0	[5],[6]
Gains (Losses) on Extinguishment of Debt	[5],[6]			0				0
Interest expense		0	[4]	0	[5],[6]	0	[4]	0	[5],[6]
Total other expense, net		(190)	[4]	(117)	[5],[6]	(222)	[4]	(56)	[5],[6]
Net Income		(190)	[4]	(117)	[5],[6]	(222)	[4]	(56)	[5],[6]
Less: Net loss attributable to noncontrolling interests		0	[4]	0	[5],[6]	0	[4]	0	[5],[6]
Net Income Attributable to NRG Yield LLC		$ (190)	[4]	$ (117)	[5],[6]	$ (222)	[4]	$ (56)	[5],[6]
[1]	(a) Retrospectively adjusted as discussed in Note 1, Nature of Business.
[2]	(a) Retrospectively adjusted as discussed in Note 1, Nature of Business.
[3]	(a) Retrospectively adjusted as discussed in Note 1, Nature of Business.
[4]	All significant intercompany transactions have been eliminated in consolidation.
[5]	(a) Retrospectively adjusted as discussed in Note 1, Nature of Business.
[6]	(b) All significant intercompany transactions have been eliminated in consolidation.

Condensed Consolidated Stateme3

Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended			6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015		Jun. 30, 2016	Jun. 30, 2015
Net Income	$ 74	$ 44	[1],[2]	$ 79	$ 21	[1],[2],[3]
Other Comprehensive Loss, net of tax
Unrealized (loss) gain on derivatives	(19)	27	[4]	(69)	(1)	[4]
Other comprehensive (loss) income	(19)	27	[4]	(69)	(1)	[4]
Comprehensive Income	55	71	[4]	10	20	[4]
Less: Comprehensive loss attributable to noncontrolling interests	(23)	(10)	[4]	(35)	(16)	[4]
Comprehensive Income Attributable to NRG Yield LLC	$ 78	$ 81	[4]	$ 45	$ 36	[4]
[1]	(a) Retrospectively adjusted as discussed in Note 1, Nature of Business.
[2]	(a) Retrospectively adjusted as discussed in Note 1, Nature of Business.
[3]	(a) Retrospectively adjusted as discussed in Note 1, Nature of Business.
[4]	(a) Retrospectively adjusted as discussed in Note 1, Nature of Business.

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets - USD ($) $ in Millions	Jun. 30, 2016	Dec. 31, 2015
Derivative instruments — affiliate	$ 1	$ 0
Current Assets
Cash and cash equivalents	89	110
Restricted cash	55	48
Accounts receivable — trade	109	95
Accounts receivable — affiliate	1	4
Inventory	35	35
Notes receivable	7	7
Prepayments and other current assets	22	22
Total current assets	319	321
Property, plant and equipment
Less accumulated depreciation	(832)	(701)
Property, plant and equipment, net of accumulated depreciation of $832 and $701	4,947	5,056
Other Assets
Equity investments in affiliates	778	798
Notes receivable	6	10
Intangible assets, net of accumulated amortization of $132 and $93	1,321	1,362
Other non-current assets	66	61
Total other assets	2,171	2,231
Total Assets	7,437	7,608
Current Liabilities
Current portion of long-term debt — external	251	241
Accounts payable — trade	21	23
Accounts payable — affiliate	32	85
Derivative instruments	37	39
Accrued expenses and other current liabilities	39	67
Total current liabilities	380	455
Other Liabilities
Long-term debt — external	3,873	3,976
Long-term debt — affiliate	618	618
Due to Related Parties, Noncurrent	20	0
Derivative instruments	122	61
Other non-current liabilities	63	64
Total non-current liabilities	4,696	4,719
Total Liabilities	5,076	5,174
Members' Equity
Contributed capital	1,965	1,963
Retained earnings	111	93
Accumulated other comprehensive loss	(142)	(82)
Noncontrolling interest	427	460
Total Members' Equity	2,361	2,434
Total Liabilities and Members’ Equity	$ 7,437	$ 7,608

Condensed Consolidated Balance5

Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Jun. 30, 2016	Dec. 31, 2015
Statement of Financial Position [Abstract]
Intangible assets, accumulated amortization	$ 132	$ 93
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment	$ 832	$ 701

Condensed Consolidated Stateme

Condensed Consolidated Statements Of Cash Flows - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	[2]
Cash Flows from Operating Activities
Net income	$ 79	$ 21	[1],[3]
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Income (Loss) from Equity Method Investments	20	10	[1],[3]
Distributions from unconsolidated affiliates	22	32
Depreciation and amortization	133	137	[1],[3]
Amortization of financing costs and debt discounts	4	4
Amortization of Intangibles and Out of Market Contracts	40	26
Gains (Losses) on Extinguishment of Debt	0	(7)	[1],[3]
Changes in derivative instruments	(2)	(37)
Disposal of asset components and ARO accretion	(4)	(2)
Changes in prepaid and accrued capacity payments	65	66
Changes in other working capital	4	(23)
Net Cash Provided by Operating Activities	199	93
Cash Flows from Investing Activities
Payments to Acquire Businesses, Net of Cash Acquired	0	37
Payment to Acquire Business under Common Control	0	489
Capital expenditures	(11)	(8)
(Increase) decrease in restricted cash	(7)	5
Decrease in notes receivable	4	3
Proceeds from Equity Method Investment, Dividends or Distributions, Return of Capital	29	15
Investments in unconsolidated affiliates	(59)	(328)
Other	2	0
Net Cash Used in Investing Activities	(42)	(839)
Cash Flows from Financing Activities
Net contributions from noncontrolling interests	8	123
Distributions to NRG for NRG Wind TE Holdco	(6)	0
Proceeds from the issuance of Class C and Class A units	0	600
Payment of distributions	(83)	(61)
Proceeds from issuance of long-term debt — affiliate	0	281
Payment of debt issuance costs	0	(4)
Proceeds from (Repayments of) Lines of Credit	12	267
Net payments of long-term debt	(109)	(582)
Net Cash (Used in) Provided by Financing Activities	(178)	624
Net Decrease in Cash and Cash Equivalents	(21)	(122)
Cash and Cash Equivalents at Beginning of Period	110	429
Cash and Cash Equivalents at End of Period	$ 89	$ 307
[1]	(a) Retrospectively adjusted as discussed in Note 1, Nature of Business.
[2]	(a) Retrospectively adjusted as discussed in Note 1, Nature of Business.
[3]	(a) Retrospectively adjusted as discussed in Note 1, Nature of Business.

Nature of Business

Nature of Business	6 Months Ended
	Jun. 30, 2016
Nature of Business Disclosure [Abstract]
Business Description and Basis of Presentation [Text Block]	Nature of Business NRG Yield LLC, together with its consolidated subsidiaries, or the Company, was formed by NRG as a Delaware limited liability company on March 5, 2013, to serve as the primary vehicle through which NRG owns, operates and acquires contracted renewable and conventional generation and thermal infrastructure assets. NRG owns 100% of NRG Yield LLC's Class B units and Class D units and receives distributions through its ownership of these units. Yield, Inc. owns 100% of NRG Yield LLC's Class A units and Class C units. NRG Yield LLC, through its wholly owned subsidiary Yield Operating LLC, holds a portfolio of renewable and conventional generation and thermal infrastructure assets, primarily located in the Northeast, Southwest and California regions of the U.S. On June 29, 2015, Yield, Inc. issued 28,198,000 shares of Class C common stock for net proceeds of $599 million . Yield, Inc. utilized the proceeds of the offering to acquire 28,198,000 Class C units of NRG Yield LLC, increasing its voting interest to 44.9% and its economic interest to 53.3% . Yield, Inc. consolidates the results of the Company through its controlling interest as sole managing member. The following table represents the structure of the Company as of June 30, 2016 : As of June 30, 2016 , the Company's operating assets are comprised of the following projects: Projects Percentage Ownership Net Capacity (MW) (a) Offtake Counterparty Expiration Conventional El Segundo 100 % 550 Southern California Edison 2023 GenConn Devon 50 % 95 Connecticut Light & Power 2040 GenConn Middletown 50 % 95 Connecticut Light & Power 2041 Marsh Landing 100 % 720 Pacific Gas and Electric 2023 Walnut Creek 100 % 485 Southern California Edison 2023 1,945 Utility Scale Solar Alpine 100 % 66 Pacific Gas and Electric 2033 Avenal 50 % 23 Pacific Gas and Electric 2031 Avra Valley 100 % 26 Tucson Electric Power 2032 Blythe 100 % 21 Southern California Edison 2029 Borrego 100 % 26 San Diego Gas and Electric 2038 CVSR 48.95 % 122 Pacific Gas and Electric 2038 Desert Sunlight 250 25 % 63 Southern California Edison 2035 Desert Sunlight 300 25 % 75 Pacific Gas and Electric 2040 Kansas South 100 % 20 Pacific Gas and Electric 2033 Roadrunner 100 % 20 El Paso Electric 2031 TA High Desert 100 % 20 Southern California Edison 2033 482 Distributed Solar AZ DG Solar Projects 100 % 5 Various 2025 - 2033 PFMG DG Solar Projects 51 % 4 Various 2032 9 Wind Alta I 100 % 150 Southern California Edison 2035 Alta II 100 % 150 Southern California Edison 2035 Alta III 100 % 150 Southern California Edison 2035 Alta IV 100 % 102 Southern California Edison 2035 Alta V 100 % 168 Southern California Edison 2035 Alta X (b) 100 % 137 Southern California Edison 2038 Alta XI (b) 100 % 90 Southern California Edison 2038 Buffalo Bear 100 % 19 Western Farmers Electric Co-operative 2033 Crosswinds 74.3 % 16 Corn Belt Power Cooperative 2027 Elbow Creek 75 % 92 NRG Power Marketing LLC 2022 Elkhorn Ridge 50.3 % 41 Nebraska Public Power District 2029 Forward 75 % 22 Constellation NewEnergy, Inc. 2017 Goat Wind 74.9 % 113 Dow Pipeline Company 2025 Hardin 74.3 % 11 Interstate Power and Light Company 2027 Laredo Ridge 100 % 80 Nebraska Public Power District 2031 Lookout 75 % 29 Southern Maryland Electric Cooperative 2030 Odin 74.9 % 15 Missouri River Energy Services 2028 Pinnacle 100 % 55 Maryland Department of General Services and University System of Maryland 2031 San Juan Mesa 56.3 % 68 Southwestern Public Service Company 2025 Sleeping Bear 75 % 71 Public Service Company of Oklahoma 2032 South Trent 100 % 101 AEP Energy Partners 2029 Spanish Fork 75 % 14 PacifiCorp 2028 Spring Canyon II (b) 90.1 % 29 Platte River Power Authority 2039 Spring Canyon III (b) 90.1 % 25 Platte River Power Authority 2039 Taloga 100 % 130 Oklahoma Gas & Electric 2031 Wildorado 74.9 % 121 Southwestern Public Service Company 2027 1,999 Projects Percentage Ownership Net Capacity (MW) (a) Offtake Counterparty Expiration Thermal Thermal equivalent MWt (c) 100 % 1,315 Various Various NRG Dover Energy Center LLC 100 % 103 NRG Power Marketing LLC 2018 Thermal generation 100 % 20 Various Various Total net capacity (excluding equivalent MWt) (d) 4,558 (a) Net capacity represents the maximum, or rated, generating capacity of the facility multiplied by the Company's percentage ownership in the facility as of June 30, 2016 . (b) Projects are part of tax equity arrangements . (c) For thermal energy, net capacity represents MWt for steam or chilled water and excludes 134 MWt available under the right-to-use provisions contained in agreements between two of the Company's thermal facilities and certain of its customers. (d) Total net capacity excludes 55 MW for RPV Holdco and 45 MW for DGPV Holdco 1 and DGPV Holdco 2, which are consolidated by NRG, as further described in Note 4 , Variable Interest Entities, or VIEs . Substantially all of the Company's generation assets are under long-term contractual arrangements for the output or capacity from these assets. The thermal assets are comprised of district energy systems and combined heat and power plants that produce steam, hot water and/or chilled water and in some instances, electricity, at a central plant. Three out of the fourteen district energy systems are subject to rate regulation by state public utility commissions while the other district energy systems have rates determined by negotiated bilateral contracts. As described in Note 9 , Related Party Transactions , the Company has a management services agreement with NRG for various services, including human resources, accounting, tax, legal, information systems, treasury, and risk management. As described in Note 3 , Business Acquisitions , on November 3, 2015, the Company acquired 75% of the Class B interests of NRG Wind TE Holdco, or the November 2015 Drop Down Assets, from NRG for cash consideration of $209 million . In February 2016, NRG made a final working capital payment of $2 million , reducing total cash consideration to $207 million . Additionally, on January 2, 2015, the Company acquired the Laredo Ridge, Tapestry, and Walnut Creek projects, or the January 2015 Drop Down Assets, for total cash consideration of $489 million , including $9 million for working capital. The acquisitions of the November 2015 Drop Down Assets and the January 2015 Drop Down Assets, or collectively, the Drop Down Assets, were accounted for as transfers of entities under common control. The accounting guidance requires retrospective combination of the entities for all periods presented as if the combination has been in effect since the inception of common control. Accordingly, the Company prepared its consolidated financial statements to reflect the transfers as if they had taken place from the beginning of the financial statements period or from the date the entities were under common control (if later than the beginning of the financial statements period), which was April 1, 2014 for the January Drop Down Assets and the majority of the November 2015 Drop Down Assets. With respect to the November 2015 Drop Down Assets, the Company has recorded all minority interests in NRG Wind TE Holdco as noncontrolling interest in the Consolidated Financial Statements for all periods presented. The accompanying unaudited interim consolidated financial statements have been prepared in accordance with the SEC’s regulations for interim financial information. Accordingly, they do not include all of the information and notes required by GAAP for complete financial statements. The following notes should be read in conjunction with the accounting policies and other disclosures as set forth in the notes to the Company's audited consolidated financial statements for the year ended December 31, 2015 . Interim results are not necessarily indicative of results for a full year. In the opinion of management, the accompanying unaudited interim consolidated financial statements contain all material adjustments consisting of normal and recurring accruals necessary to present fairly the Company's consolidated financial position as of June 30, 2016 , and the results of operations, comprehensive income and cash flows for the six months ended June 30, 2016 , and 2015 .

Summary of Significant Accounti

Summary of Significant Accounting Policies	6 Months Ended
	Jun. 30, 2016
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Summary of Significant Accounting Policies Use of Estimates The preparation of consolidated financial statements in accordance with GAAP requires management to make estimates and assumptions. These estimates and assumptions impact the reported amount of assets and liabilities and disclosures of contingent assets and liabilities as of the date of the consolidated financial statements. They also impact the reported amount of net earnings during the reporting period. Actual results could be different from these estimates. Noncontrolling Interests The following table reflects the changes in the Company's noncontrolling interest balance: (In millions) Balance as of December 31, 2015 460 Capital contributions from tax equity investors, net of distributions 8 Distributions to NRG for NRG Wind TE Holdco (6 ) Comprehensive loss (35 ) Balance as of June 30, 2016 $ 427 Distributions The following table lists the distributions paid on NRG Yield LLC's Class A, B, C and D units during the six months ended June 30, 2016 : Second Quarter 2016 First Quarter 2016 Distributions per Class A, B, C and D unit $ 0.23 $ 0.225 On July 26, 2016 , the Company declared a distribution on its Class A, Class B, Class C and Class D units of $0.24 per unit payable on September 15, 2016 to unit holders of record as of September 1, 2016 . Recent Accounting Developments ASU 2016-07 — In March 2016, the FASB issued ASU No. 2016-07, Investments - Equity Method and Joint Ventures (Topic 323), or ASU No. 2016-07. The amendments of ASU No. 2016-07 eliminate the requirement that when an investment qualifies for use of the equity method as a result of an increase in the level of ownership interest or degree of influence, an investor must adjust the investment, results of operations, and retained earnings retroactively on a step-by-step basis as if the equity method had been in effect during all previous periods that the investment had been held. The amendments require that the equity method investor add the cost of acquiring the additional interest in the investee to the current basis of the investor's previously held interest and adopt the equity method of accounting with no retroactive adjustment to the investment. In addition, ASU No. 2016-07 requires that an entity that has an available-for-sale equity security that becomes qualified for the equity method of accounting recognize through earnings the unrealized holding gain or loss in accumulated other comprehensive income at the date the investment becomes qualified for use of the equity method. The guidance in ASU No. 2016-07 is effective for fiscal years beginning after December 15, 2016, and interim periods within those annual periods. The adoption of ASU No. 2016-07 is required to be applied prospectively and early adoption is permitted. The Company does not expect the standard to have a material impact on its results of operations, cash flows and financial position. ASU 2016-02 — In February 2016, the FASB issued ASU No. 2016-02, Leases (Topic 842), or ASU No. 2016-02. The amendments of ASU No. 2016-02 complete the joint effort between the FASB and the International Accounting Standards Board, or IASB, to develop a common leasing standard for GAAP and International Financial Reporting Standards, or IFRS, with the objective to increase transparency and comparability among organizations by recognizing lease assets and lease liabilities on the balance sheet and to improve financial reporting. The guidance in ASU No. 2016-02 provides that a lessee that may have previously accounted for a lease as an operating lease under current GAAP should recognize the assets and liabilities that arise from a lease on the balance sheet. In addition, ASU No. 2016-02 expands the required quantitative and qualitative disclosures with regards to lease arrangements. The guidance in ASU No. 2016-02 is effective for fiscal years beginning after December 15, 2018, and interim periods within those annual periods. The adoption of ASU No. 2016-02 is required to be applied using a modified retrospective approach for the earliest period presented and early adoption is permitted. The Company is currently evaluating the impact of the standard on the Company's results of operations, cash flows and financial position. ASU 2016-01 — In January 2016, the FASB issued ASU No. 2016-01, Financial Instruments - Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities , or ASU No. 2016-01. The amendments of ASU No. 2016-01 eliminate available-for-sale classification of equity investments and require that equity investments (except those accounted for under the equity method of accounting, or those that result in consolidation of the investee) to be generally measured at fair value with changes in fair value recognized in net income. Further, the amendments require financial assets and financial liabilities to be presented separately in the notes to the financial statements, grouped by measurement category and form of financial asset. The guidance in ASU No. 2016-01 is effective for financial statements issued for fiscal years beginning after December 15, 2017, and interim periods within those annual periods. The Company is currently evaluating the impact of the standard on the Company's results of operations, cash flows and financial position. ASU 2015-16 — In September 2015, the FASB issued ASU No. 2015-16, Business Combinations (Topic 805): Simplifying the Accounting for Measurement-Period Adjustments , or ASU No. 2015-16. The amendments of ASU No. 2015-16 require that an acquirer recognize measurement period adjustments to the provisional amounts recognized in a business combination in the reporting period during which the adjustments are determined. Additionally, the amendments of ASU No. 2015-16 require the acquirer to record in the same period's financial statements the effect on earnings of changes in depreciation, amortization or other income effects, if any, as a result of the measurement period adjustment, calculated as if the accounting had been completed at the acquisition date as well as disclosing on either the face of the income statement or in the notes the portion of the amount recorded in current period earnings that would have been recorded in previous reporting periods. The guidance in ASU No. 2015-16 is effective for financial statements issued for fiscal years beginning after December 15, 2015, and interim periods within those fiscal years. The amendments should be applied prospectively. The Company adopted this standard on January 1, 2016, and the adoption of this standard did not impact the Company's results of operations, cash flows or financial position. ASU 2014-09 — In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers (Topic 606), or ASU No. 2014-09. The amendments of ASU No. 2014-09 complete the joint effort between the FASB and the International Accounting Standards Board, or IASB, to develop a common revenue standard for GAAP and International Financial Reporting Standards, or IFRS, and to improve financial reporting. The guidance in ASU No. 2014-09 provides that an entity should recognize revenue to depict the transfer of goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled to in exchange for the goods or services provided and establishes the following steps to be applied by an entity: (1) identify the contract with a customer; (2) identify the performance obligations in the contract; (3) determine the transaction price; (4) allocate the transaction price to the performance obligations in the contract; and (5) recognize revenue when (or as) the entity satisfies the performance obligation. In August 2015, the FASB issued ASU 2015-14, which formally deferred the effective date by one year to make the guidance of ASU No. 2014-09 effective for annual reporting periods beginning after December 15, 2017, including interim periods therein. Early adoption is permitted, but not prior to the original effective date, which was for annual reporting periods beginning after December 15, 2016. In addition to ASU No. 2014-09, the FASB has issued additional guidance which provides further clarification on Topic 606. In March 2016, the FASB issued ASU No. 2016-08, Revenue from Contracts with Customers (Topic 606), or ASU No. 2016-08. The amendments of ASU No. 2016-08 clarify how to apply the implementation guidance on principal versus agent considerations related to the sale of goods or services to a customer as updated by ASU No. 2014-09. In April 2016, the FASB issued ASU No. 2016-10, Revenue from Contracts with Customers (Topic 606), or ASU No. 2016-10. The amendments of ASU No. 2016-10 provide further clarification on contract revenue recognition as updated by ASU No. 2014-09, specifically related to the identification of separately identifiable performance obligations and the implementation of licensing contracts. In May 2016, the FASB issued ASU No. 2016-12, Revenue from Contracts with Customers (Topic 606), or ASU No. 2016-12. The amendments of ASU No. 2016-12 provide further clarification on contract revenue recognition as updated by ASU No. 2014-09, specifically related to collectability, the presentation of tax collected from customers, and non-cash consideration, as well as offering practical expedients. The Company is working through an adoption plan which includes the evaluation of revenue contracts compared to the new standard and evaluating the impact of Topic 606 on the Company's results of operations, cash flows and financial position.

Business Acquisitions

Business Acquisitions	6 Months Ended
	Jun. 30, 2016
Business Combinations [Abstract]
Business Acquisition	Business Acquisitions 2016 Acquisitions CVSR — On August 8, 2016 , the Company and NRG entered into a definitive agreement regarding the acquisition of the remaining 51.05% interest in the CVSR project for total expected cash consideration of $78.5 million plus assumed debt and working capital adjustments to be calculated at close. The sale is subject to customary closing conditions and is expected to close during the third quarter of 2016. The Company expects to fund the acquisition with drawings under the Company's revolving credit facility. The acquisition will be accounted for as a transfer of entities under common control. The accounting guidance requires retrospective combination of the entities for all periods presented as if the combination has been in effect since the inception of common control. Accordingly, the Company will prepare its consolidated financial statements to reflect the transfer as if it had taken place from the beginning of the financial statements period or from the date the entities were under common control (if later than the beginning of the financial statements period), which would be January 1, 2015. The recast would not affect net income attributable to NRG Yield, Inc., weighted average number of shares outstanding, earnings per share or dividends. 2015 Acquisitions November 2015 Drop Down Assets from NRG — On November 3, 2015, the Company acquired the November 2015 Drop Down Assets, a portfolio of 12 wind facilities totaling 814 net MW, from NRG for cash consideration of $209 million , subject to working capital adjustments. In February 2016, NRG made a final working capital payment of $2 million , reducing total cash consideration to $207 million . The Company is responsible for its pro-rata share of non-recourse project debt of $193 million and noncontrolling interest associated with a tax equity structure of $159 million (as of the acquisition date). The Company funded the acquisition with borrowings from its revolving credit facility. The assets and liabilities transferred to the Company relate to interests under common control by NRG and were recorded at historical cost. The difference between the cash paid and historical value of the entities' equity was recorded as a distribution from NRG with the offset to contributed capital. The Class A interests of NRG Wind TE Holdco are owned by a tax equity investor, or TE Investor, who receives 99% of allocations of taxable income and other items until the flip point, which occurs when the TE Investor obtains a specified return on its initial investment, at which time the allocations to the TE Investor change to 8.53% . The Company generally receives 75% of CAFD until the flip point, at which time the allocations to the Company of CAFD change to 68.60% . If the flip point has not occurred by a specified date, 100% of CAFD is allocated to the TE Investor until the flip point occurs. NRG Wind TE Holdco is a VIE and the Company is the primary beneficiary, through its position as managing member, and consolidates NRG Wind TE Holdco. Desert Sunlight — On June 29, 2015, the Company acquired 25% of the membership interest in Desert Sunlight Investment Holdings, LLC, which owns two solar photovoltaic facilities that total 550 MW, located in Desert Center, California from EFS Desert Sun, LLC, an affiliate of GE Energy Financial Services for a purchase price of $285 million . Power generated by the facilities is sold to Southern California Edison and Pacific Gas and Electric under long-term PPAs with approximately 20 years and 25 years of remaining contract life, respectively. The Company accounts for its 25% investment as an equity method investment. Spring Canyon — On May 7, 2015, the Company acquired a 90.1% interest in Spring Canyon II, a 32 MW wind facility, and Spring Canyon III, a 28 MW wind facility, each located in Logan County, Colorado, from Invenergy Wind Global LLC. The purchase price was funded with cash on hand. Power generated by Spring Canyon II and Spring Canyon III is sold to Platte River Power Authority under long-term PPAs with approximately 24 years of remaining contract life. University of Bridgeport Fuel Cell — On April 30, 2015, the Company completed the acquisition of the University of Bridgeport Fuel Cell project in Bridgeport, Connecticut from FuelCell Energy, Inc. The project added an additional 1.4 MW of thermal capacity to the Company's portfolio, with a 12 -year contract, with the option for a 7 -year extension. The acquisition is reflected in the Company's Thermal segment. January 2015 Drop Down Assets from NRG — On January 2, 2015, the Company acquired the following projects from NRG: (i) Laredo Ridge, an 80 MW wind facility located in Petersburg, Nebraska, (ii) Tapestry, which includes Buffalo Bear, a 19 MW wind facility in Buffalo, Oklahoma; Taloga, a 130 MW wind facility in Putnam, Oklahoma; and Pinnacle, a 55 MW wind facility in Keyser, West Virginia, and (iii) Walnut Creek, a 485 MW natural gas facility located in City of Industry, California, for total cash consideration of $489 million , including $9 million for working capital, plus assumed project-level debt of $737 million . The Company funded the acquisition with cash on hand and drawings under its revolving credit facility. The assets and liabilities transferred to the Company relate to interests under common control by NRG and were recorded at historical cost. The difference between the cash paid and the historical value of the entities' equity of $61 million , as well as $23 million of AOCL, was recorded as a distribution to NRG and reduced the balance of its contributed capital.

Variable Interest Entities

Variable Interest Entities	6 Months Ended
	Jun. 30, 2016
Equity Method Investments and Joint Ventures [Abstract]
Investments Accounted for by the Equity Method and Variable Interest Entities	Entities that are Consolidated The Company has a controlling financial interest in certain entities which have been identified as VIEs under ASC 810, Consolidations, or ASC 810. These arrangements are primarily related to tax equity arrangements entered into with third parties in order to monetize certain tax credits associated with wind facilities, as further described in Note 5 , Investments Accounted for by the Equity Method and Variable Interest Entities , to the Company's audited consolidated financial statements included in the 2015 Form 10-K. Summarized financial information for the Company's consolidated VIEs consisted of the following as of June 30, 2016 : (In millions) NRG Wind TE Holdco Alta Wind TE Holdco Spring Canyon Other current and non-current assets $ 190 $ 27 $ 4 Property, plant and equipment 638 472 102 Intangible assets 2 281 — Total assets 830 780 106 Current and non-current liabilities 215 8 6 Total liabilities 215 8 6 Noncontrolling interest 235 121 70 Net assets less noncontrolling interests $ 380 $ 651 $ 30 Entities that are not Consolidated The Company has interests in entities that are considered VIEs under ASC 810, but for which it is not considered the primary beneficiary. The Company accounts for its interests in these entities under the equity method of accounting, as further described in Note 5 , Investments Accounted for by the Equity Method and Variable Interest Entities , to the Company's audited consolidated financial statements included in the 2015 Form 10-K. NRG DGPV Holdco 1 LLC — The Company and NRG, maintain a partnership, NRG DGPV Holdco 1 LLC, or DGPV Holdco 1, the purpose of which is to own or purchase solar power generation projects and other ancillary related assets from NRG Renew LLC or its subsidiaries, via intermediate funds, including: (i) a tax equity-financed portfolio of 10 recently completed community solar projects representing approximately 8 MW with a weighted average remaining PPA term of 20 years ; and (ii) a tax equity-financed portfolio of approximately 12 commercial photovoltaic systems representing approximately 37 MW with a weighted average remaining PPA term of 19 years . Both of these investments relate to the Company's $100 million commitment to distributed solar projects in partnership with NRG. NRG DGPV Holdco 2 LLC — On February 29, 2016, the Company and NRG entered into an additional partnership by forming NRG DGPV Holdco 2 LLC, or DGPV Holdco 2, to own or purchase solar power generation projects and other ancillary related assets from NRG Renew LLC or its subsidiaries, via intermediate funds. Under this partnership, the Company committed to fund up to $50 million of capital. The Company's maximum exposure to loss is limited to its equity investment in DGPV Holdco 1 and DGPV Holdco 2, which was $78 million on a combined basis as of June 30, 2016 . NRG RPV Holdco 1 LLC — The Company and NRG Residential Solar Solutions LLC, a subsidiary of NRG, maintain a partnership, NRG RPV Holdco 1 LLC, or RPV Holdco, that holds operating portfolios of residential solar assets developed by NRG Home Solar, a subsidiary of NRG, including: (i) an existing, unlevered portfolio of over 2,200 leases across nine states representing approximately 17 MW with a weighted average remaining lease term of approximately 17 years ; and (ii) a tax equity-financed portfolio of approximately 5,500 leases representing approximately 38 MW, with an average lease term for the existing and new leases of approximately 17 to 20 years . Under this partnership, the Company had previously committed to fund up to $150 million of capital, which was reduced to $100 million in February 2016. The Company's maximum exposure to loss is limited to its equity investment, which was $67 million as of June 30, 2016 . On August 5, 2016, the Company and NRG amended the RPV Holdco partnership to further reduce the aggregate commitment of $100 million to $60 million in connection with NRG’s change in business model approach in the residential solar business. GenConn Energy LLC — The Company has a 50% interest in GCE Holding LLC, the owner of GenConn, which owns and operates two 190 MW peaking generation facilities in Connecticut at the Devon and Middletown sites. As of June 30, 2016 , the Company's investment in GenConn was $108 million and its maximum exposure to loss is limited to its equity investment. The following table presents summarized financial information for GCE Holding LLC: Three months ended June 30, Six months ended June 30, (In millions) 2016 2015 2016 2015 Income Statement Data: Operating revenues $ 18 $ 18 $ 36 $ 40 Operating income 10 11 19 20 Net income $ 6 $ 8 $ 13 $ 14 June 30, 2016 December 31, 2015 Balance Sheet Data: (In millions) Current assets $ 34 $ 36 Non-current assets 408 416 Current liabilities 14 16 Non-current liabilities $ 211 $ 215

Fair Value of Financial Instrum

Fair Value of Financial Instruments	6 Months Ended
	Jun. 30, 2016
Fair Value Disclosures [Abstract]
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]	The Company records its derivative assets and liabilities at fair value on its consolidated balance sheet. There were no derivative asset positions on the Company's consolidated balance sheet as of December 31, 2015 . The following table presents assets and liabilities measured and recorded at fair value on the Company's consolidated balance sheets on a recurring basis and their level within the fair value hierarchy: As of June 30, 2016 As of December 31, 2015 Fair Value (a) Fair Value (a) (In millions) Level 2 Level 2 Derivative assets: Commodity contracts $ 1 $ — Total assets 1 — Derivative liabilities: Commodity contracts — 2 Interest rate contracts 159 98 Total liabilities $ 159 $ 100
Fair Value of Financial Instruments	Fair Value of Financial Instruments Fair Value Accounting under ASC 820 ASC 820 establishes a fair value hierarchy that prioritizes the inputs to valuation techniques used to measure fair value into three levels as follows: • Level 1—quoted prices (unadjusted) in active markets for identical assets or liabilities that the Company has the ability to access as of the measurement date. • Level 2—inputs other than quoted prices included within Level 1 that are directly observable for the asset or liability or indirectly observable through corroboration with observable market data. • Level 3—unobservable inputs for the asset or liability only used when there is little, if any, market activity for the asset or liability at the measurement date. In accordance with ASC 820, the Company determines the level in the fair value hierarchy within which each fair value measurement in its entirety falls, based on the lowest level input that is significant to the fair value measurement. For cash and cash equivalents, restricted cash, accounts receivable, accounts receivable — affiliate, accounts payable, accounts payable — affiliate, accrued expenses and other liabilities, the carrying amounts approximate fair value because of the short-term maturity of those instruments and are classified as Level 1 within the fair value hierarchy. The estimated carrying amounts and fair values of the Company’s recorded financial instruments not carried at fair market value are as follows: As of June 30, 2016 As of December 31, 2015 Carrying Amount Fair Value Carrying Amount Fair Value (In millions) Assets: Notes receivable, including current portion $ 13 $ 13 $ 17 $ 17 Liabilities: Long-term debt — affiliate 618 590 618 553 Long-term debt — external, including current portion $ 4,171 $ 4,169 $ 4,267 $ 4,181 The fair value of notes receivable and long-term debt are based on expected future cash flows discounted at market interest rates, or current interest rates for similar instruments, and are classified as Level 3 within the fair value hierarchy. Recurring Fair Value Measurements The Company records its derivative assets and liabilities at fair value on its consolidated balance sheet. There were no derivative asset positions on the Company's consolidated balance sheet as of December 31, 2015 . The following table presents assets and liabilities measured and recorded at fair value on the Company's consolidated balance sheets on a recurring basis and their level within the fair value hierarchy: As of June 30, 2016 As of December 31, 2015 Fair Value (a) Fair Value (a) (In millions) Level 2 Level 2 Derivative assets: Commodity contracts $ 1 $ — Total assets 1 — Derivative liabilities: Commodity contracts — 2 Interest rate contracts 159 98 Total liabilities $ 159 $ 100 (a) There were no assets or liabilities classified as Level 1 or Level 3 as of June 30, 2016 , and December 31, 2015 . Derivative Fair Value Measurements The Company's contracts are non-exchange-traded and valued using prices provided by external sources. For the Company’s energy markets, management receives quotes from multiple sources. To the extent that multiple quotes are received, the prices reflect the average of the bid-ask mid-point prices obtained from all sources believed to provide the most liquid market for the commodity. The fair value of each contract is discounted using a risk free interest rate. In addition, a credit reserve is applied to reflect credit risk, which is, for interest rate swaps, calculated based on credit default swaps using the bilateral method. For commodities, to the extent that the net exposure under a specific master agreement is an asset, the Company uses the counterparty’s default swap rate. If the net exposure under a specific master agreement is a liability, the Company uses NRG's default swap rate. For interest rate swaps and commodities, the credit reserve is added to the discounted fair value to reflect the exit price that a market participant would be willing to receive to assume the liabilities or that a market participant would be willing to pay for the assets. As of June 30, 2016 , the credit reserve resulted in a $5 million increase in fair value, which was composed of a $4 million gain in OCI and $1 million gain in interest expense. It is possible that future market prices could vary from those used in recording assets and liabilities and such variations could be material. Concentration of Credit Risk In addition to the credit risk discussion in Note 2 , Summary of Significant Accounting Policies , to the Company's audited consolidated financial statements included in the Company's 2015 Form 10-K , the following is a discussion of the concentration of credit risk for the Company's financial instruments. Credit risk relates to the risk of loss resulting from non-performance or non-payment by counterparties pursuant to the terms of their contractual obligations. The Company monitors and manages credit risk through credit policies that include: (i) an established credit approval process; (ii) daily monitoring of counterparties' credit limits; (iii) the use of credit mitigation measures such as margin, collateral, prepayment arrangements, or volumetric limits; (iv) the use of payment netting agreements; and (v) the use of master netting agreements that allow for the netting of positive and negative exposures of various contracts associated with a single counterparty. Risks surrounding counterparty performance and credit could ultimately impact the amount and timing of expected cash flows. The Company seeks to mitigate counterparty risk by having a diversified portfolio of counterparties. Counterparty credit exposure includes credit risk exposure under certain long-term agreements, including solar and other PPAs. As external sources or observable market quotes are not available to estimate such exposure, the Company estimates the exposure related to these contracts based on various techniques including, but not limited to, internal models based on a fundamental analysis of the market and extrapolation of observable market data with similar characteristics. Based on these valuation techniques, as of June 30, 2016 , credit risk exposure to these counterparties attributable to the Company's ownership interests was approximately $2.5 billion for the next five years . The majority of these power contracts are with utilities with strong credit quality and public utility commission or other regulatory support, as further described in Note 11 , Segment Reporting , to the Company's audited consolidated financial statements included in the Company's 2015 Form 10-K . However, such regulated utility counterparties can be impacted by changes in government regulations, which the Company is unable to predict.

Accounting for Derivative Instr

Accounting for Derivative Instruments and Hedging Activities (Notes)	6 Months Ended
	Jun. 30, 2016
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Accounting for Derivative Instruments and Hedging Activities	Accounting for Derivative Instruments and Hedging Activities This footnote should be read in conjunction with the complete description under Note 7, Accounting for Derivative Instruments and Hedging Activities , to the Company's audited consolidated financial statements included in the Company's 2015 Form 10-K. Energy-Related Commodities As of June 30, 2016 , the Company had forward contracts for the purchase of fuel commodities relating to the forecasted usage of the Company’s district energy centers extending through 2018. At June 30, 2016 , these contracts were not designated as cash flow or fair value hedges. Interest Rate Swaps As of June 30, 2016 , the Company had interest rate derivative instruments on non-recourse debt extending through 2031, most of which are designated as cash flow hedges. Volumetric Underlying Derivative Transactions The following table summarizes the net notional volume buy/(sell) of the Company's open derivative transactions broken out by commodity as of June 30, 2016 , and December 31, 2015 . Total Volume June 30, 2016 December 31, 2015 Commodity Units (In millions) Natural Gas MMBtu 4 4 Interest Dollars $ 1,932 $ 1,991 Fair Value of Derivative Instruments There were no derivative asset positions on the balance sheet as of December 31, 2015 . The following table summarizes the fair value within the derivative instrument valuation on the balance sheet: Fair Value Derivative Assets Derivative Liabilities June 30, 2016 June 30, 2016 December 31, 2015 (In millions) Derivatives Designated as Cash Flow Hedges: Interest rate contracts current $ — $ 34 $ 34 Interest rate contracts long-term — 108 56 Total Derivatives Designated as Cash Flow Hedges — 142 90 Derivatives Not Designated as Cash Flow Hedges : Interest rate contracts current — 3 3 Interest rate contracts long-term — 14 5 Commodity contracts current 1 — 2 Total Derivatives Not Designated as Cash Flow Hedges 1 17 10 Total Derivatives $ 1 $ 159 $ 100 The Company has elected to present derivative assets and liabilities on the balance sheet on a trade-by-trade basis and does not offset amounts at the counterparty master agreement level. As of June 30, 2016 , and December 31, 2015 , there were no offsetting amounts at the counterparty master agreement level or outstanding collateral paid or received. Accumulated Other Comprehensive Loss The following table summarizes the effects on the Company’s accumulated OCL balance attributable to interest rate swaps designated as cash flow hedge derivatives: Three months ended June 30, Six months ended June 30, 2016 2015 2016 2015 (In millions) Accumulated OCL beginning balance $ (135 ) $ (95 ) $ (85 ) $ (67 ) Reclassified from accumulated OCL to income due to realization of previously deferred amounts 3 4 7 7 Mark-to-market of cash flow hedge accounting contracts (22 ) 23 (76 ) (8 ) Accumulated OCL ending balance $ (154 ) $ (68 ) $ (154 ) $ (68 ) Accumulated OCL attributable to noncontrolling interests (12 ) (3 ) (12 ) (3 ) Accumulated OCL attributable to NRG Yield LLC $ (142 ) $ (65 ) $ (142 ) $ (65 ) Losses expected to be realized from OCL during the next 12 months $ 22 $ 22 Amounts reclassified from accumulated OCL into income and amounts recognized in income from the ineffective portion of cash flow hedges are recorded to interest expense. There was no ineffectiveness for the six months ended June 30, 2016 , and 2015 . Impact of Derivative Instruments on the Statements of Income The Company has interest rate derivative instruments that are not designated as cash flow hedges. The effect of interest rate hedges is recorded to interest expense. For the three months ended June 30, 2016 , and 2015 , the impact to the consolidated statements of income was a loss of $2 million and a gain of $31 million , respectively. For the six months ended June 30, 2016 , and 2015 , the impact to the consolidated statements of income was a loss of $9 million and a gain of $19 million , respectively. A portion of the Company’s derivative commodity contracts relates to its Thermal Business for the purchase of fuel commodities based on the forecasted usage of the thermal district energy centers. Realized gains and losses on these contracts are reflected in the fuel costs that are permitted to be billed to customers through the related customer contracts or tariffs and, accordingly, no gains or losses are reflected in the consolidated statements of income for these contracts. Commodity contracts also hedged the forecasted sale of power for Elbow Creek, Alta X and Alta XI in 2015 until the start of the PPAs. The effect of these commodity hedges was recorded to operating revenues. For the three and six months ended June 30, 2015 , the impact to the consolidated statements of income was an unrealized loss of $4 million and an unrealized gain of $3 million , respectively. See Note 5 , Fair Value of Financial Instruments , for a discussion regarding concentration of credit risk.

Long-term Debt

Long-term Debt	6 Months Ended
	Jun. 30, 2016
Debt Disclosure [Abstract]
Long-term Debt	Long-term Debt This footnote should be read in conjunction with the complete description under Note 9, Long-term Debt , to the Company's audited consolidated financial statements included in the 2015 Form 10-K. Long-term debt consisted of the following: June 30, 2016 December 31, 2015 June 30, 2016, interest rate % (a) Letters of Credit Outstanding at June 30, 2016 (In millions, except rates) Long-term debt - affiliate, due 2019 $ 337 $ 337 3.580 Long-term debt - affiliate, due 2020 281 281 3.325 Senior Notes, due 2024 500 500 5.375 NRG Yield LLC and NRG Yield Operating LLC Revolving Credit Facility, due 2019 (b) 318 306 L+2.75 $ 67 Project-level debt: Alpine, due 2022 151 154 L+1.75 37 Alta Wind I, lease financing arrangement, due 2034 245 252 7.015 16 Alta Wind II, lease financing arrangement, due 2034 194 198 5.696 23 Alta Wind III, lease financing arrangement, due 2034 201 206 6.067 24 Alta Wind IV, lease financing arrangement, due 2034 130 133 5.938 16 Alta Wind V, lease financing arrangement, due 2035 208 213 6.071 27 Alta Realty Investments, due 2031 32 33 7.000 — Alta Wind Asset Management, due 2031 18 19 L+2.375 — Avra Valley, due 2031 58 60 L+1.75 3 Blythe, due 2028 21 21 L+1.625 6 Borrego, due 2025 and 2038 71 72 L+ 2.50/5.65 5 El Segundo Energy Center, due 2023 457 485 L+1.625 - L+2.25 82 Energy Center Minneapolis, due 2017 and 2025 100 108 5.95 -7.25 — Kansas South, due 2031 31 33 L+2.00 4 Laredo Ridge, due 2028 102 104 L+1.875 10 Marsh Landing, due 2017 and 2023 410 418 L+1.75 - L+1.875 45 PFMG and related subsidiaries financing agreement, due 2030 29 29 6.000 — Roadrunner, due 2031 38 40 L+1.625 5 South Trent Wind, due 2020 59 62 L+1.625 10 TA High Desert, due 2020 and 2032 51 52 L+2.50/5.15 8 Tapestry, due 2021 176 181 L+1.625 20 Viento, due 2023 183 189 L+2.75 27 Walnut Creek, due 2023 341 351 L+1.625 60 WCEP Holdings, due 2023 46 46 L+3.00 — Other 1 2 various — Subtotal project-level debt: 3,353 3,461 Total debt 4,789 4,885 Less current maturities 251 241 Less deferred financing costs 47 50 Total long-term debt $ 4,491 $ 4,594 (a) As of June 30, 2016 , L+ equals 3 month LIBOR plus x%, except for the Marsh Landing term loan, Walnut Creek term loan, and NRG Yield LLC and NRG Yield Operating LLC Revolving Credit Facility, where L+ equals 1 month LIBOR plus x% and Kansas South, where L+ equals 6 month LIBOR plus x%. (b) Applicable rate is determined by the Borrower Leverage Ratio, as defined in the credit agreement. The financing arrangements listed above contain certain covenants, including financial covenants that the Company is required to be in compliance with during the term of the respective arrangement. As of June 30, 2016 , the Company was in compliance with all of the required covenants. The discussion below describes material changes to or additions of long-term debt for the six months ended June 30, 2016 . CVSR Holdco Financing Arrangement On July 15, 2016, CVSR Holdco, the indirect owner of the CVSR project, which is 48.95% owned by the Company, issued $200 million of senior secured notes that bear interest at 4.68% and mature on March 31, 2037. The Company’s pro-rata share of the borrowings was $97.5 million . Net proceeds of $97.5 million were distributed to NRG Yield Operating LLC based on its pro-rata ownership.

Segment Reporting

Segment Reporting	6 Months Ended
	Jun. 30, 2016
Segment Reporting [Abstract]
Segment Reporting	Segment Reporting The Company’s segment structure reflects how management currently operates and allocates resources. The Company's businesses are primarily segregated based on conventional power generation, renewable businesses which consist of solar and wind, and the thermal and chilled water business. The Corporate segment reflects the Company's corporate costs. The Company's chief operating decision maker, its Chief Executive Officer, evaluates the performance of its segments based on operational measures including adjusted earnings before interest, depreciation and amortization, or Adjusted EBITDA, and CAFD, as well as economic gross margin and net income (loss). Three months ended June 30, 2016 (In millions) Conventional Generation Renewables Thermal Corporate Total Operating revenues $ 85 $ 134 $ 39 $ — $ 258 Cost of operations 16 32 27 — 75 Depreciation and amortization 20 42 5 — 67 General and administrative — — — 3 3 Operating income (loss) 49 60 7 (3 ) 113 Equity in earnings of unconsolidated affiliates 4 14 — — 18 Other income, net — 1 — — 1 Interest expense (12 ) (30 ) (1 ) (15 ) (58 ) Net Income (Loss) $ 41 $ 45 $ 6 $ (18 ) $ 74 Total Assets $ 2,037 $ 4,961 $ 423 $ 16 $ 7,437 Three months ended June 30, 2015 (a) (In millions) Conventional Generation Renewables Thermal Corporate Total Operating revenues $ 85 $ 108 $ 42 $ — $ 235 Cost of operations 15 29 31 — 75 Depreciation and amortization 21 45 4 — 70 General and administrative — — — 3 3 Acquisition-related transaction and integration costs — — — 1 1 Operating income (loss) 49 34 7 (4 ) 86 Equity in earnings of unconsolidated affiliates 4 4 — — 8 Loss on debt extinguishment (7 ) — — — (7 ) Interest expense (13 ) (17 ) (2 ) (11 ) (43 ) Net Income (Loss) $ 33 $ 21 $ 5 $ (15 ) $ 44 (a) Retrospectively adjusted as discussed in Note 1, Nature of Business . Six months ended June 30, 2016 (In millions) Conventional Generation Renewables Thermal Corporate Total Operating revenues $ 164 $ 231 $ 83 $ — $ 478 Cost of operations 39 63 56 — 158 Depreciation and amortization 40 83 10 — 133 General and administrative — — — 5 5 Operating income (loss) 85 85 17 (5 ) 182 Equity in earnings of unconsolidated affiliates 7 13 — 20 Other income, net — 1 — — 1 Interest expense (23 ) (66 ) (3 ) (32 ) (124 ) Net Income (Loss) $ 69 $ 33 $ 14 $ (37 ) $ 79 Six months ended June 30, 2015 (a) (In millions) Conventional Generation Renewables Thermal Corporate Total Operating revenues $ 161 $ 185 $ 89 $ — $ 435 Cost of operations 36 58 65 — 159 Depreciation and amortization 42 86 9 — 137 General and administrative — — — 6 6 Acquisition-related transaction and integration costs — — — 1 1 Operating income (loss) 83 41 15 (7 ) 132 Equity in earnings of unconsolidated affiliates 7 3 — — 10 Other income, net 1 — — — 1 Loss on debt extinguishment (7 ) — — — (7 ) Interest expense (25 ) (63 ) (4 ) (23 ) (115 ) Net Income (Loss) $ 59 $ (19 ) $ 11 $ (30 ) $ 21 (a) Retrospectively adjusted as discussed in Note 1, Nature of Business .

Related Party Transactions

Related Party Transactions	6 Months Ended
	Jun. 30, 2016
Related Party Transactions [Abstract]
Related Party Transactions Disclosure	Related Party Transactions In addition to the transactions and relationships described elsewhere in these notes to the consolidated financial statements, NRG and certain subsidiaries of NRG provide services to the Company and its project entities. Amounts due to NRG subsidiaries are recorded as accounts payable - affiliate and amounts due to the Company from NRG or its subsidiaries are recorded as accounts receivable - affiliate in the Company's balance sheet. Power Hedge Contracts by and between Renewables segment Entities and NRG Certain NRG Wind TE Holdco entities, which are subsidiaries in the Renewables segment, entered into power hedge contracts with NRG Texas Power LLC and generated $12 million during the six months ended June 30, 2015 . Effective October 2015, Elbow Creek, one of the NRG Wind TE Holdco entities, entered into a PPA with NRG Power Marketing LLC, or NRG Power Marketing, as further described below, and the hedge agreement between Elbow Creek and NRG Texas Power LLC was terminated. Additionally, Alta X and Alta XI entered into a hedge agreement with NRG Power Marketing, as further described in Note 6 , Accounting for Derivative Instruments and Hedging Activities , to hedge the forecasted sale of power until the start of the PPAs on January 1, 2016. Power Purchase Agreement by and between Elbow Creek and NRG In October 2015, Elbow Creek, the Company's subsidiary in the Renewables segment, entered into a PPA with NRG Power Marketing for the sale of energy and environmental attributes with the effective date of November 1, 2015, and expiring on October 31, 2022. Elbow Creek generated $4 million of revenue during the six months ended June 30, 2016 . Operation and Maintenance (O&M) Services Agreements by and between Thermal Entities and NRG Certain wholly-owned subsidiaries of the Company are party to a Plant O&M Services Agreement with NRG, pursuant to which NRG provides necessary and appropriate services to operate and maintain the subsidiaries' plant operations, businesses and thermal facilities. NRG is reimbursed for the provided services, as well as for all reasonable and related expenses and expenditures, and payments to third parties for services and materials rendered to or on behalf of the parties to the agreements. NRG is not entitled to any management fee or mark-up under the agreements. Total fees incurred under the agreements were $15 million for the six months ended June 30, 2016 , and 2015 . There was a balance of $27 million and $29 million due to NRG in accounts payable — affiliate as of June 30, 2016 , and December 31, 2015 , respectively. As of June 30, 2016 , $7 million of the balance was recorded in the current liabilities of the consolidated balance sheet and $20 million was recorded in long term liabilities of the consolidated balance sheet. Subsequent to June 30, 2016 , $4 million of the outstanding balance has been paid. Power Purchase Agreement by and between NRG Energy Center Dover LLC and NRG In February 2016, NRG Energy Center Dover LLC, or NRG Dover, a subsidiary of the Company, entered into a PPA with NRG Power Marketing for the sale of energy and environmental attributes with an effective date of February 1, 2016 and expiration date of December 31, 2018. NRG Dover generated $2 million of revenue during the six months ended June 30, 2016 . The agreement in place is additive to the existing Power Sales and Services Agreement as described further below. Power Sales and Services Agreement by and between NRG Energy Center Dover LLC and NRG NRG Energy Center Dover LLC, or NRG Dover, a subsidiary of the Company, is party to a Power Sales and Services Agreement with NRG Power Marketing. The agreement is automatically renewed on a month-to-month basis unless terminated by either party upon at least 30 days written notice. Under the agreement, NRG Power Marketing has the exclusive right to (i) manage, market and sell power, (ii) procure fuel and fuel transportation for operation of the Dover generating facility, to include for purposes other than generating power, (iii) procure transmission services required for the sale of power, and (iv) procure and market emissions credits for operation of the Dover generating facility. In addition, NRG Power Marketing has the exclusive right and obligation to direct the output from the generating facility, in accordance with and to meet the terms of any power sales contracts executed against the power generation of the Dover facility. Under the agreement, NRG Power Marketing pays NRG Dover gross receipts generated through sales, less costs incurred by NRG Power Marketing related to providing such services as transmission and delivery costs, as well as fuel costs. In July 2013, the coal-fueled plant was converted to a natural gas facility. For the six months ended June 30, 2016 , and 2015 , NRG Dover purchased $1 million and $3 million , respectively, of natural gas from NRG Power Marketing. Energy Marketing Services Agreement by and between NRG Energy Center Minneapolis LLC and NRG NRG Energy Center Minneapolis LLC, or NRG Minneapolis, a subsidiary of the Company is party to an Energy Marketing Services Agreement with NRG Power Marketing, a wholly-owned subsidiary of NRG. Under the agreement, NRG Power Marketing procures fuel and fuel transportation for the operation of the Minneapolis generating facility. For the six months ended June 30, 2016 , and 2015 , NRG Minneapolis purchased $4 million and $5 million , respectively, of natural gas from NRG Power Marketing. O&M Services Agreements by and between GenConn and NRG GenConn incurs fees under two O&M services agreements with wholly-owned subsidiaries of NRG. The fees incurred under the agreements were $3 million and $2 million for the six months ended June 30, 2016 , and 2015 , respectively. O&M Services Agreement by and between El Segundo and NRG El Segundo incurs fees under an O&M services agreement with NRG El Segundo Operations, Inc., a wholly-owned subsidiary of NRG. Under the O&M services agreement, NRG El Segundo Operations, Inc. manages, operates and maintains the El Segundo facility for an initial term of ten years following the commercial operations date. For the six months ended June 30, 2016 , and 2015 , the costs incurred under the agreement were $2 million . There was a balance of $1 million due to NRG El Segundo in accounts payable — affiliate as of June 30, 2016 , and December 31, 2015 . Administrative Services Agreement by and between Marsh Landing and NRG Marsh Landing is a party to an administrative services agreement with GenOn Energy Services, LLC, a wholly-owned subsidiary of NRG, which provides invoice processing and payment on behalf of Marsh Landing. Marsh Landing reimburses GenOn Energy Services, LLC for the amounts paid by it. The Company reimbursed costs under this agreement of $5 million and $9 million for the six months ended June 30, 2016 , and 2015 , respectively. There was a balance of $6 million due to GenOn Energy Services, LLC in accounts payable — affiliate as of June 30, 2016 , and December 31, 2015 . Administrative Services Agreement by and between CVSR and NRG CVSR is a party to an administrative services agreement with NRG Renew Operation & Maintenance LLC, a wholly-owned subsidiary of NRG, which provides O&M services on behalf of CVSR. CVSR reimburses NRG Energy Services LLC for the amounts paid by it. CVSR reimbursed costs under this agreement of $2 million and $3 million for the six months ended June 30, 2016 , and 2015 , respectively. Management Services Agreement by and between the Company and NRG NRG provides the Company with various operation, management, and administrative services, which include human resources, accounting, tax, legal, information systems, treasury, and risk management, as set forth in the Management Services Agreement. As of June 30, 2016 , the base management fee was approximately $7 million per year, subject to an inflation-based adjustment annually at an inflation factor based on the year-over-year U.S. consumer price index. The fee is also subject to adjustments following the consummation of future acquisitions and as a result of a change in the scope of services provided under the Management Services Agreement. During the year ended December 31, 2015, the fee was increased by $1 million per year primarily due to the acquisitions of the January 2015 Drop Down Assets and the November 2015 Drop Down Assets. Costs incurred under this agreement were $4 million and $5 million for the six months ended June 30, 2016 , and 2015 , respectively, which included certain direct expenses incurred by NRG on behalf of the Company in addition to the base management fee. There was a balance of $4 million due to NRG in accounts payable — affiliate as of June 30, 2016 . Subsequent to June 30, 2016 , the balance has been paid in full. Administrative Services Agreements by and between NRG Wind TE Holdco and NRG Certain subsidiaries of NRG have entered into agreements with the Company's project entities to provide operation and maintenance services for the balance of the plants not covered by turbine supplier's maintenance and service agreements for the post-warranty period. The agreements have various terms with provisions for extension until terminated. For the six months ended June 30, 2016 , and 2015 , the costs incurred under the agreements were $3 million and $2 million , respectively. Certain subsidiaries of NRG provide support services to the NRG Wind TE Holdco project entities pursuant to various support services agreements. The agreements provide for administrative and support services and reimbursements of certain insurance, consultant, and credit costs. For the six months ended June 30, 2016 , and 2015 , the costs incurred under the agreements were $1 million

Condensed Consolidating Financi

Condensed Consolidating Financial Information Condensed Consolidating Financial Information	6 Months Ended
	Jun. 30, 2016
Condensed Consolidating Financial Information Disclosure [Abstract]
Condensed Financial Statements [Text Block]	Condensed Consolidating Financial Information As of June 30, 2016 , Yield Operating LLC had outstanding $500 million of Senior Notes as shown in Note 7 , Long-term Debt . These Senior Notes are guaranteed by NRG Yield LLC, as well as certain of the Company's subsidiaries, or guarantor subsidiaries. These guarantees are both joint and several. The non-guarantor subsidiaries include the rest of the Company's subsidiaries, including those that are subject to project financing. Unless otherwise noted below, each of the following guarantor subsidiaries fully and unconditionally guaranteed the Senior Notes as of June 30, 2016 : NRG Yield LLC Alta Wind 1-5 Holding Company, LLC Alta Wind Company, LLC NRG Energy Center Omaha Holdings LLC NRG Energy Center Omaha LLC NYLD Fuel Cell Holdings LLC UB Fuel Cell, LLC NRG South Trent Holdings LLC NRG Yield DGPV Holding LLC NRG Yield RPV Holding LLC Yield Operating LLC conducts much of its business through and derives much of its income from its subsidiaries. Therefore, its ability to make required payments with respect to its indebtedness and other obligations depends on the financial results and condition of its subsidiaries and Yield Operating LLC's ability to receive funds from its subsidiaries. There are no restrictions on the ability of any of the guarantor subsidiaries to transfer funds to Yield Operating LLC. However, there may be restrictions for certain non-guarantor subsidiaries. The following condensed consolidating financial information presents the financial information of NRG Yield LLC, Yield Operating LLC, the issuer of the Senior Notes, the guarantor subsidiaries and the non-guarantor subsidiaries in accordance with Rule 3-10 under the SEC Regulation S-X. The financial information may not necessarily be indicative of results of operations or financial position had the guarantor subsidiaries or non-guarantor subsidiaries operated as independent entities. In this presentation, NRG Yield LLC consists of parent company operations. Guarantor subsidiaries and non-guarantor subsidiaries of NRG Yield LLC are reported on an equity basis. For companies acquired, the fair values of the assets and liabilities acquired have been presented on a push-down accounting basis. As described in Note 3 , Business Acquisitions , the Company completed the acquisition of the November 2015 Drop Down Assets from NRG on November 3, 2015. The guidance requires retrospective combination of the entities for all periods presented as if the combination has been in effect since the inception of common control. Accordingly, the Company prepared its condensed consolidating financial statements to reflect the transfer as if it had taken place from the beginning of the financial statements period. The Company has recorded all minority interests in NRG Wind TE Holdco as noncontrolling interest in the Consolidated Financial Statements for all periods presented. NRG Yield LLC Other Guarantor Subsidiaries Non-Guarantor Subsidiaries NRG Yield Operating LLC (Note Issuer) Eliminations (a) Consolidated (In millions) Operating Revenues Total operating revenues $ — $ 5 $ 253 $ — $ — $ 258 Operating Costs and Expenses Cost of operations — 4 71 — — 75 Depreciation and amortization — 1 66 — — 67 General and administrative — — — 3 — 3 Total operating costs and expenses — 5 137 3 — 145 Operating Income (Loss) — — 116 (3 ) — 113 Other Income (Expense) Equity in earnings of consolidated affiliates 89 24 — 77 (190 ) — Equity in earnings of unconsolidated affiliates — 3 — 15 — 18 Other income, net — — 1 — — 1 Interest expense — — (43 ) (15 ) — (58 ) Total other income (expense), net 89 27 (42 ) 77 (190 ) (39 ) Net Income 89 27 74 74 (190 ) 74 Less: Net loss attributable to noncontrolling interests — — — (15 ) — (15 ) Net Income Attributable to $ 89 $ 27 $ 74 $ 89 $ (190 ) $ 89 NRG YIELD LLC AND SUBSIDIARIES CONDENSED CONSOLIDATING STATEMENTS OF INCOME For the Six Months Ended June 30, 2016 (Unaudited) NRG Yield LLC Other Guarantor Subsidiaries Non-Guarantor Subsidiaries NRG Yield Operating LLC (Note Issuer) Eliminations (a) Consolidated (In millions) Operating Revenues Total operating revenues $ — $ 10 $ 468 $ — $ — $ 478 Operating Costs and Expenses Cost of operations — 7 151 — — 158 Depreciation and amortization — 2 131 — — 133 General and administrative — — — 5 — 5 Total operating costs and expenses — 9 282 5 — 296 Operating Income (Loss) — 1 186 (5 ) — 182 Other Income (Expense) Equity in earnings of consolidated affiliates 105 17 — 100 (222 ) — Equity in earnings (losses) of unconsolidated affiliates — 7 (2 ) 15 — 20 Other income, net — — 1 — — 1 Interest expense — — (93 ) (31 ) — (124 ) Total other income (expense), net 105 24 (94 ) 84 (222 ) (103 ) Net Income 105 25 92 79 (222 ) 79 Less: Net loss attributable to noncontrolling interests — — — (26 ) — (26 ) Net Income Attributable to $ 105 $ 25 $ 92 $ 105 $ (222 ) $ 105 (a) All significant intercompany transactions have been eliminated in consolidation. NRG YIELD LLC AND SUBSIDIARIES CONDENSED CONSOLIDATING STATEMENTS OF COMPREHENSIVE INCOME For the Three Months Ended June 30, 2016 (Unaudited) NRG Yield LLC Guarantor Subsidiaries Non-Guarantor Subsidiaries NRG Yield Operating LLC (Note Issuer) Eliminations (a) Consolidated (In millions) Net Income $ 89 $ 27 $ 74 $ 74 $ (190 ) $ 74 Other Comprehensive Loss Unrealized (loss) gain on derivatives (11 ) 1 (18 ) (19 ) 28 (19 ) Other comprehensive (loss) income (11 ) 1 (18 ) (19 ) 28 (19 ) Comprehensive Income 78 28 56 55 (162 ) 55 Less: Comprehensive loss attributable to noncontrolling interests — — — (23 ) — (23 ) Comprehensive Income Attributable to NRG Yield LLC $ 78 $ 28 $ 56 $ 78 $ (162 ) $ 78 (a) All significant intercompany transactions have been eliminated in consolidation. For the Six Months Ended June 30, 2016 (Unaudited) NRG Yield LLC Guarantor Subsidiaries Non-Guarantor Subsidiaries NRG Yield Operating LLC (Note Issuer) Eliminations (a) Consolidated (In millions) Net Income $ 105 $ 25 $ 92 $ 79 $ (222 ) $ 79 Other Comprehensive Loss Unrealized loss on derivatives (60 ) — (64 ) (69 ) 124 (69 ) Other comprehensive loss (60 ) — (64 ) (69 ) 124 (69 ) Comprehensive Income 45 25 28 10 (98 ) 10 Less: Comprehensive loss attributable to noncontrolling interests — — — (35 ) — (35 ) Comprehensive Income Attributable to NRG Yield LLC $ 45 $ 25 $ 28 $ 45 $ (98 ) $ 45 (a) All significant intercompany transactions have been eliminated in consolidation. NRG YIELD LLC AND SUBSIDIARIES CONDENSED CONSOLIDATING BALANCE SHEETS June 30, 2016 (Unaudited) NRG Yield LLC Other Guarantor Subsidiaries Non-Guarantor Subsidiaries NRG Yield Operating LLC Eliminations (a) Consolidated ASSETS (In millions) Current Assets Cash and cash equivalents $ 14 $ — $ 75 $ — $ — $ 89 Restricted cash — — 55 — — 55 Accounts receivable — trade — 3 106 — — 109 Accounts receivable — affiliate — — 1 — — 1 Inventory — 3 32 — — 35 Derivative instruments — — 1 — — 1 Notes receivable — — 7 — — 7 Prepayments and other current assets — — 22 — — 22 Total current assets 14 6 299 — — 319 Net property, plant and equipment — 59 4,888 — — 4,947 Other Assets Investment in consolidated subsidiaries 1,920 561 — 3,202 (5,683 ) — Equity investments in affiliates — 78 165 535 — 778 Notes receivable — — 6 — — 6 Intangible assets, net — 56 1,265 — — 1,321 Other non-current assets — — 64 2 — 66 Total other assets 1,920 695 1,500 3,739 (5,683 ) 2,171 Total Assets $ 1,934 $ 760 $ 6,687 $ 3,739 $ (5,683 ) $ 7,437 (a) All significant intercompany transactions have been eliminated in consolidation. NRG YIELD LLC AND SUBSIDIARIES CONDENSED CONSOLIDATING BALANCE SHEETS (Continued) June 30, 2016 NRG Yield LLC Other Guarantor Subsidiaries Non-Guarantor Subsidiaries NRG Yield Operating LLC Eliminations (a) Consolidated LIABILITIES AND MEMBERS' EQUITY (In millions) Current Liabilities Current portion of long-term debt — external $ — $ — $ 251 $ — $ — $ 251 Accounts payable — 1 16 4 — 21 Accounts payable — affiliate — 6 18 8 32 Derivative instruments — — 37 — — 37 Accrued expenses and other current liabilities — 1 21 17 — 39 Total current liabilities — 8 343 29 — 380 Other Liabilities Long-term debt — external — — 3,061 812 — 3,873 Long-term debt — affiliate — — — 618 — 618 Accounts payable — affiliate — — 20 — — 20 Derivative instruments — — 122 — — 122 Other non-current liabilities — — 63 — — 63 Total non-current liabilities — — 3,266 1,430 — 4,696 Total Liabilities — 8 3,609 1,459 — 5,076 Commitments and Contingencies Members' Equity Contributed capital 1,965 812 3,051 1,945 (5,808 ) 1,965 Retained earnings (accumulated deficit) 111 (57 ) 93 117 (153 ) 111 Accumulated other comprehensive loss (142 ) (3 ) (133 ) (142 ) 278 (142 ) Noncontrolling interest — — 67 360 — 427 Total Members' Equity 1,934 752 3,078 2,280 (5,683 ) 2,361 Total Liabilities and Members’ Equity $ 1,934 $ 760 $ 6,687 $ 3,739 $ (5,683 ) $ 7,437 (a) All significant intercompany transactions have been eliminated in consolidation. NRG YIELD LLC AND SUBSIDIARIES CONDENSED CONSOLIDATING STATEMENTS OF CASH FLOWS For the Six Months Ended June 30, 2016 (Unaudited) NRG Yield LLC Other Guarantor Subsidiaries Non-Guarantor Subsidiaries NRG Yield Operating LLC (Note Issuer) Consolidated (In millions) Net Cash Provided by Operating Activities $ — $ 41 $ 103 $ 55 $ 199 Cash Flows from Investing Activities Intercompany transactions between Yield LLC and subsidiaries 33 — — (33 ) — Capital expenditures — — (11 ) — (11 ) Increase in restricted cash — — (7 ) — (7 ) Decrease in notes receivable — — 4 — 4 Return of investment from unconsolidated affiliates — 1 — 28 29 Net investments in unconsolidated affiliates — (44 ) — (15 ) (59 ) Other — — — 2 2 Net Cash Provided by (Used in) Investing Activities 33 (43 ) (14 ) (18 ) (42 ) Cash Flows from Financing Activities Transfer of funds under intercompany cash management arrangement 49 2 — (51 ) — Net contributions from noncontrolling interests — — — 8 8 Distributions to NRG for NRG Wind TE Holdco — — — (6 ) (6 ) Payment of distributions (83 ) — — — (83 ) Net borrowings from the revolving credit facility — — — 12 12 Net payments for long-term debt — — (109 ) (109 ) Net Cash (Used in) Provided by Financing Activities (34 ) 2 (109 ) (37 ) (178 ) Net Decrease in Cash and Cash Equivalents (1 ) — (20 ) — (21 ) Cash and Cash Equivalents at Beginning of Period 15 — 95 — 110 Cash and Cash Equivalents at End of Period $ 14 $ — $ 75 $ — $ 89 NRG YIELD LLC AND SUBSIDIARIES CONDENSED CONSOLIDATING STATEMENTS OF INCOME For the Three Months Ended June 30, 2015 (Unaudited) NRG Yield LLC (a) Other Guarantor Subsidiaries Non-Guarantor Subsidiaries (a) NRG Yield Operating LLC (Note Issuer) (a) Eliminations (a) (b) Consolidated (In millions) Operating Revenues (Losses) Total operating revenues (losses) $ — $ 5 $ 231 $ (1 ) $ — $ 235 Operating Costs and Expenses Cost of operations — 3 72 — — 75 Depreciation and amortization — 1 69 — — 70 General and administrative — — — 3 — 3 Acquisition-related transaction and integration costs — — — 1 — 1 Total operating costs and expenses — 4 141 4 — 149 Operating Income (Loss) — 1 90 (5 ) — 86 Other (Expense) Income Equity in earnings of consolidated affiliates 55 6 — 56 (117 ) — Equity in (losses) earnings of unconsolidated affiliates — — (1 ) 9 — 8 Loss on debt extinguishment — — (7 ) — — (7 ) Interest expense — — (31 ) (12 ) — (43 ) Total other income (expense), net 55 6 (39 ) 53 (117 ) (42 ) Net Income 55 7 51 48 (117 ) 44 Less: Net loss attributable to noncontrolling interests — — (4 ) (7 ) — (11 ) Net Income Attributable to NRG Yield LLC $ 55 $ 7 $ 55 $ 55 $ (117 ) $ 55 (a) Retrospectively adjusted as discussed in Note 1, Nature of Business . (b) All significant intercompany transactions have been eliminated in consolidation. NRG YIELD LLC AND SUBSIDIARIES CONDENSED CONSOLIDATING STATEMENTS OF OPERATIONS For the Six Months Ended June 30, 2015 (Unaudited) NRG Yield LLC (a) Other Guarantor Subsidiaries Non-Guarantor Subsidiaries (a) NRG Yield Operating LLC (Note Issuer) (a) Eliminations (a) (b) Consolidated (In millions) Operating Revenues Total operating revenues $ — $ 10 $ 417 $ 8 $ — $ 435 Operating Costs and Expenses Cost of operations — 7 152 — — 159 Depreciation and amortization — 2 135 — — 137 General and administrative — — — 6 — 6 Acquisition-related transaction and integration costs — — — 1 — 1 Total operating costs and expenses — 9 287 7 — 303 Operating Income — 1 130 1 — 132 Other (Expense) Income Equity in income (losses) of consolidated affiliates 37 (19 ) — 38 (56 ) — Equity in earnings of unconsolidated affiliates — — — 10 — 10 Other income, net — — 1 — — 1 Loss on debt extinguishment — — (7 ) — — (7 ) Interest expense — — (91 ) (24 ) — (115 ) Total other expense, net 37 (19 ) (97 ) 24 (56 ) (111 ) Net Income (Loss) 37 (18 ) 33 25 (56 ) 21 Less: Net loss attributable to noncontrolling interests — — (4 ) (12 ) — (16 ) Net Income (Loss) Attributable to NRG Yield LLC $ 37 $ (18 ) $ 37 $ 37 $ (56 ) $ 37 (a) Retrospectively adjusted as discussed in Note 1, Nature of Business . (b) All significant intercompany transactions have been eliminated in consolidation. NRG YIELD LLC AND SUBSIDIARIES CONDENSED CONSOLIDATING BALANCE SHEETS December 31, 2015 NRG Yield LLC Other Guarantor Subsidiaries Non-Guarantor Subsidiaries NRG Yield Operating LLC Eliminations (a) Consolidated ASSETS (In millions) Current Assets Cash and cash equivalents $ 15 $ — $ 95 $ — $ — $ 110 Restricted cash — — 48 — — 48 Accounts receivable — trade — 1 94 — — 95 Accounts receivable — affiliate 55 4 6 10 (71 ) 4 Inventory — 2 33 — — 35 Notes receivable — — 7 3 (3 ) 7 Prepayments and other current assets — 1 21 — — 22 Total current assets 70 8 304 13 (74 ) 321 Net property, plant and equipment — 61 4,995 — — 5,056 Other Assets Investment in consolidated subsidiaries 1,904 548 — 3,270 (5,722 ) — Equity investments in affiliates — 70 176 552 — 798 Notes receivable — — 10 — — 10 Intangible assets, net — 57 1,305 — — 1,362 Other non-current assets — — 59 2 — 61 Total other assets 1,904 675 1,550 3,824 (5,722 ) 2,231 Total Assets $ 1,974 $ 744 $ 6,849 $ 3,837 $ (5,796 ) $ 7,608 (a) All significant intercompany transactions have been eliminated in consolidation. NRG YIELD LLC AND SUBSIDIARIES CONDENSED CONSOLIDATING BALANCE SHEETS (Continued) December 31, 2015 NRG Yield LLC Other Guarantor Subsidiaries Non-Guarantor Subsidiaries NRG Yield Operating LLC Eliminations (a) Consolidated LIABILITIES AND MEMBERS' EQUITY (In millions) Current Liabilities Current portion of long-term debt — external $ — $ — $ 244 $ — $ (3 ) $ 241 Accounts payable — 1 19 3 — 23 Accounts payable — affiliate — 8 45 104 (72 ) 85 Derivative instruments — 1 38 — — 39 Accrued expenses and other current liabilities — 1 49 17 — 67 Total current liabilities — 11 395 124 (75 ) 455 Other Liabilities Long-term debt — external — — 3,176 800 — 3,976 Long-term debt — affiliate — — — 618 — 618 Derivative instruments — — 61 — — 61 Other non-current liabilities — — 64 — — 64 Total non-current liabilities — — 3,301 1,418 — 4,719 Total Liabilities — 11 3,696 1,542 (75 ) 5,174 Commitments and Contingencies Members' Equity Contributed capital 1,963 821 3,162 1,895 (5,878 ) 1,963 Retained earnings (Accumulated deficit) 93 (85 ) (11 ) 93 3 93 Accumulated other comprehensive loss (82 ) (3 ) (69 ) (82 ) 154 (82 ) Noncontrolling Interest — — 71 389 — 460 Total Members' Equity 1,974 733 3,153 2,295 (5,721 ) 2,434 Total Liabilities and Members’ Equity $ 1,974 $ 744 $ 6,849 $ 3,837 $ (5,796 ) $ 7,608 (a) All significant intercompany transactions have been eliminated in consolidation. NRG YIELD LLC AND SUBSIDIARIES CONDENSED CONSOLIDATING STATEMENTS OF CASH FLOWS For the Six Months Ended June 30, 2015 (Unaudited) NRG Yield LLC Other Guarantor Subsidiaries Non-Guarantor Subsidiaries (a) NRG Yield Operating LLC (Note Issuer) Consolidated (In millions) Net Cash (Used in) Provided by Operating Activities $ (23 ) $ 10 $ 74 $ 32 $ 93 Cash Flows from Investing Activities Intercompany transactions from Yield LLC to subsidiaries (517 ) — — 517 — Acquisition of businesses, net of cash acquired — — — (37 ) (37 ) Acquisition of Drop Down Assets, net of cash acquired — — — (489 ) (489 ) Capital expenditures — — (8 ) — (8 ) Decrease in restricted cash — — 5 — 5 Decrease in notes receivable — — 3 — 3 Return of investment from unconsolidated affiliates — — — 15 15 Investments in unconsolidated affiliates — (4 ) — (324 ) (328 ) Net Cash Used in Investing Activities (517 ) (4 ) — (318 ) (839 ) Cash Flows from Financing Activities Capital contributions from NRG — — 494 (494 ) — Contributions from noncontrolling interests — — 4 119 123 Proceeds from the issuance of Class C units 600 — — — 600 Payment of distributions (61 ) — — — (61 ) Net payments for long-term debt — — (582 ) — (582 ) Net borrowings from the revolving credit facility — — — 267 267 Transfer of funds under intercompany cash management arrangement (107 ) (6 ) — 113 — Proceeds from long-term debt - affiliate — — — 281 281 Payment of debt issuance costs — — (4 ) — (4 ) Net Cash Provided by (Used in) Financing Activities 432 (6 ) (88 ) 286 624 Net Decrease in Cash and Cash Equivalents (108 ) — (14 ) — (122 ) Cash and Cash Equivalents at Beginning of Period 328 — 101 — 429 Cash and Cash Equivalents at End of Period $ 220 $ — $ 87 $ — $ 307 (a) Retrospectively adjusted as discussed in Note 1, Nature of Business .

Commitments and Contingencies (

Commitments and Contingencies (Notes)	6 Months Ended
	Jun. 30, 2016
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies Disclosure [Text Block]	Contingencies The Company's material legal proceeding is described below. The Company believes that it has a valid defense to this legal proceeding and intends to defend it vigorously. The Company records reserves for estimated losses from contingencies when information available indicates that a loss is probable and the amount of the loss, or range of loss, can be reasonably estimated. In addition, legal costs are expensed as incurred. Management assesses such matters based on current information and makes a judgment concerning its potential outcome, considering the nature of the claim, the amount and nature of damages sought, and the probability of success. The Company is unable to predict the outcome of the legal proceeding below or reasonably estimate the scope or amount of any associated costs and potential liabilities. As additional information becomes available, management adjusts its assessment and estimates of such contingencies accordingly. Because litigation is subject to inherent uncertainties and unfavorable rulings or developments, it is possible that the ultimate resolution of the Company's liabilities and contingencies could be at amounts that are different from its currently recorded reserves and that such difference could be material. In addition to the legal proceeding noted below, the Company and its subsidiaries are party to other litigation or legal proceedings arising in the ordinary course of business. In management's opinion, the disposition of these ordinary course matters will not materially adversely affect the Company's consolidated financial position, results of operations, or cash flows. Braun v. NRG Yield, Inc. — On April 19, 2016, plaintiffs filed a purported class action lawsuit against NRG Yield, Inc. and against each current and former member of its board of directors individually in California Superior Court in Kern County, CA. Plaintiffs allege various violations of the Securities Act due to the defendants’ alleged failure to disclose material facts related to low wind production prior to the Company's June 22, 2015 Class C common stock offering. Plaintiffs seek compensatory damages, rescission, attorney’s fees and costs. On August 3, 2016, the court approved a stipulation entered into by the parties. The stipulation provides that the plaintiffs will file an amended complaint by August 19, 2016. The Defendants need to file a responsive pleading by October 18, 2016.

Summary of Significant Accoun18

Summary of Significant Accounting Policies Summary of Significant Accounting Policies (Policies)	6 Months Ended
	Jun. 30, 2016
Accounting Policies [Abstract]
Distributions [Policy Text Block]	Distributions The following table lists the distributions paid on NRG Yield LLC's Class A, B, C and D units during the six months ended June 30, 2016 : Second Quarter 2016 First Quarter 2016 Distributions per Class A, B, C and D unit $ 0.23 $ 0.225 On July 26, 2016 , the Company declared a distribution on its Class A, Class B, Class C and Class D units of $0.24 per unit payable on September 15, 2016 to unit holders of record as of September 1, 2016 .
Use of Estimates	Use of Estimates The preparation of consolidated financial statements in accordance with GAAP requires management to make estimates and assumptions. These estimates and assumptions impact the reported amount of assets and liabilities and disclosures of contingent assets and liabilities as of the date of the consolidated financial statements. They also impact the reported amount of net earnings during the reporting period. Actual results could be different from these estimates.
Recent Accounting Developments	Recent Accounting Developments ASU 2016-07 — In March 2016, the FASB issued ASU No. 2016-07, Investments - Equity Method and Joint Ventures (Topic 323), or ASU No. 2016-07. The amendments of ASU No. 2016-07 eliminate the requirement that when an investment qualifies for use of the equity method as a result of an increase in the level of ownership interest or degree of influence, an investor must adjust the investment, results of operations, and retained earnings retroactively on a step-by-step basis as if the equity method had been in effect during all previous periods that the investment had been held. The amendments require that the equity method investor add the cost of acquiring the additional interest in the investee to the current basis of the investor's previously held interest and adopt the equity method of accounting with no retroactive adjustment to the investment. In addition, ASU No. 2016-07 requires that an entity that has an available-for-sale equity security that becomes qualified for the equity method of accounting recognize through earnings the unrealized holding gain or loss in accumulated other comprehensive income at the date the investment becomes qualified for use of the equity method. The guidance in ASU No. 2016-07 is effective for fiscal years beginning after December 15, 2016, and interim periods within those annual periods. The adoption of ASU No. 2016-07 is required to be applied prospectively and early adoption is permitted. The Company does not expect the standard to have a material impact on its results of operations, cash flows and financial position. ASU 2016-02 — In February 2016, the FASB issued ASU No. 2016-02, Leases (Topic 842), or ASU No. 2016-02. The amendments of ASU No. 2016-02 complete the joint effort between the FASB and the International Accounting Standards Board, or IASB, to develop a common leasing standard for GAAP and International Financial Reporting Standards, or IFRS, with the objective to increase transparency and comparability among organizations by recognizing lease assets and lease liabilities on the balance sheet and to improve financial reporting. The guidance in ASU No. 2016-02 provides that a lessee that may have previously accounted for a lease as an operating lease under current GAAP should recognize the assets and liabilities that arise from a lease on the balance sheet. In addition, ASU No. 2016-02 expands the required quantitative and qualitative disclosures with regards to lease arrangements. The guidance in ASU No. 2016-02 is effective for fiscal years beginning after December 15, 2018, and interim periods within those annual periods. The adoption of ASU No. 2016-02 is required to be applied using a modified retrospective approach for the earliest period presented and early adoption is permitted. The Company is currently evaluating the impact of the standard on the Company's results of operations, cash flows and financial position. ASU 2016-01 — In January 2016, the FASB issued ASU No. 2016-01, Financial Instruments - Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities , or ASU No. 2016-01. The amendments of ASU No. 2016-01 eliminate available-for-sale classification of equity investments and require that equity investments (except those accounted for under the equity method of accounting, or those that result in consolidation of the investee) to be generally measured at fair value with changes in fair value recognized in net income. Further, the amendments require financial assets and financial liabilities to be presented separately in the notes to the financial statements, grouped by measurement category and form of financial asset. The guidance in ASU No. 2016-01 is effective for financial statements issued for fiscal years beginning after December 15, 2017, and interim periods within those annual periods. The Company is currently evaluating the impact of the standard on the Company's results of operations, cash flows and financial position. ASU 2015-16 — In September 2015, the FASB issued ASU No. 2015-16, Business Combinations (Topic 805): Simplifying the Accounting for Measurement-Period Adjustments , or ASU No. 2015-16. The amendments of ASU No. 2015-16 require that an acquirer recognize measurement period adjustments to the provisional amounts recognized in a business combination in the reporting period during which the adjustments are determined. Additionally, the amendments of ASU No. 2015-16 require the acquirer to record in the same period's financial statements the effect on earnings of changes in depreciation, amortization or other income effects, if any, as a result of the measurement period adjustment, calculated as if the accounting had been completed at the acquisition date as well as disclosing on either the face of the income statement or in the notes the portion of the amount recorded in current period earnings that would have been recorded in previous reporting periods. The guidance in ASU No. 2015-16 is effective for financial statements issued for fiscal years beginning after December 15, 2015, and interim periods within those fiscal years. The amendments should be applied prospectively. The Company adopted this standard on January 1, 2016, and the adoption of this standard did not impact the Company's results of operations, cash flows or financial position. ASU 2014-09 — In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers (Topic 606), or ASU No. 2014-09. The amendments of ASU No. 2014-09 complete the joint effort between the FASB and the International Accounting Standards Board, or IASB, to develop a common revenue standard for GAAP and International Financial Reporting Standards, or IFRS, and to improve financial reporting. The guidance in ASU No. 2014-09 provides that an entity should recognize revenue to depict the transfer of goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled to in exchange for the goods or services provided and establishes the following steps to be applied by an entity: (1) identify the contract with a customer; (2) identify the performance obligations in the contract; (3) determine the transaction price; (4) allocate the transaction price to the performance obligations in the contract; and (5) recognize revenue when (or as) the entity satisfies the performance obligation. In August 2015, the FASB issued ASU 2015-14, which formally deferred the effective date by one year to make the guidance of ASU No. 2014-09 effective for annual reporting periods beginning after December 15, 2017, including interim periods therein. Early adoption is permitted, but not prior to the original effective date, which was for annual reporting periods beginning after December 15, 2016. In addition to ASU No. 2014-09, the FASB has issued additional guidance which provides further clarification on Topic 606. In March 2016, the FASB issued ASU No. 2016-08, Revenue from Contracts with Customers (Topic 606), or ASU No. 2016-08. The amendments of ASU No. 2016-08 clarify how to apply the implementation guidance on principal versus agent considerations related to the sale of goods or services to a customer as updated by ASU No. 2014-09. In April 2016, the FASB issued ASU No. 2016-10, Revenue from Contracts with Customers (Topic 606), or ASU No. 2016-10. The amendments of ASU No. 2016-10 provide further clarification on contract revenue recognition as updated by ASU No. 2014-09, specifically related to the identification of separately identifiable performance obligations and the implementation of licensing contracts. In May 2016, the FASB issued ASU No. 2016-12, Revenue from Contracts with Customers (Topic 606), or ASU No. 2016-12. The amendments of ASU No. 2016-12 provide further clarification on contract revenue recognition as updated by ASU No. 2014-09, specifically related to collectability, the presentation of tax collected from customers, and non-cash consideration, as well as offering practical expedients. The Company is working through an adoption plan which includes the evaluation of revenue contracts compared to the new standard and evaluating the impact of Topic 606 on the Company's results of operations, cash flows and financial position.
Noncontrolling Interest Disclosure [Text Block]	The following table reflects the changes in the Company's noncontrolling interest balance: (In millions) Balance as of December 31, 2015 460 Capital contributions from tax equity investors, net of distributions 8 Distributions to NRG for NRG Wind TE Holdco (6 ) Comprehensive loss (35 ) Balance as of June 30, 2016 $ 427

Segment Reporting Segment Repor

Segment Reporting Segment Reporting (Policies)	6 Months Ended
	Jun. 30, 2016
Segment Reporting [Abstract]
Segment Reporting, Policy [Policy Text Block]	The Company’s segment structure reflects how management currently operates and allocates resources. The Company's businesses are primarily segregated based on conventional power generation, renewable businesses which consist of solar and wind, and the thermal and chilled water business. The Corporate segment reflects the Company's corporate costs. The Company's chief operating decision maker, its Chief Executive Officer, evaluates the performance of its segments based on operational measures including adjusted earnings before interest, depreciation and amortization, or Adjusted EBITDA, and CAFD, as well as economic gross margin and net income (loss).

Nature of Business Nature of Bu

Nature of Business Nature of Business (Tables)	6 Months Ended
	Jun. 30, 2016
Nature of Business Disclosure [Abstract]
IPO of NRG Yield [Table Text Block]	The following table represents the structure of the Company as of June 30, 2016 :
Schedule of Ownership [Table Text Block]	As of June 30, 2016 , the Company's operating assets are comprised of the following projects: Projects Percentage Ownership Net Capacity (MW) (a) Offtake Counterparty Expiration Conventional El Segundo 100 % 550 Southern California Edison 2023 GenConn Devon 50 % 95 Connecticut Light & Power 2040 GenConn Middletown 50 % 95 Connecticut Light & Power 2041 Marsh Landing 100 % 720 Pacific Gas and Electric 2023 Walnut Creek 100 % 485 Southern California Edison 2023 1,945 Utility Scale Solar Alpine 100 % 66 Pacific Gas and Electric 2033 Avenal 50 % 23 Pacific Gas and Electric 2031 Avra Valley 100 % 26 Tucson Electric Power 2032 Blythe 100 % 21 Southern California Edison 2029 Borrego 100 % 26 San Diego Gas and Electric 2038 CVSR 48.95 % 122 Pacific Gas and Electric 2038 Desert Sunlight 250 25 % 63 Southern California Edison 2035 Desert Sunlight 300 25 % 75 Pacific Gas and Electric 2040 Kansas South 100 % 20 Pacific Gas and Electric 2033 Roadrunner 100 % 20 El Paso Electric 2031 TA High Desert 100 % 20 Southern California Edison 2033 482 Distributed Solar AZ DG Solar Projects 100 % 5 Various 2025 - 2033 PFMG DG Solar Projects 51 % 4 Various 2032 9 Wind Alta I 100 % 150 Southern California Edison 2035 Alta II 100 % 150 Southern California Edison 2035 Alta III 100 % 150 Southern California Edison 2035 Alta IV 100 % 102 Southern California Edison 2035 Alta V 100 % 168 Southern California Edison 2035 Alta X (b) 100 % 137 Southern California Edison 2038 Alta XI (b) 100 % 90 Southern California Edison 2038 Buffalo Bear 100 % 19 Western Farmers Electric Co-operative 2033 Crosswinds 74.3 % 16 Corn Belt Power Cooperative 2027 Elbow Creek 75 % 92 NRG Power Marketing LLC 2022 Elkhorn Ridge 50.3 % 41 Nebraska Public Power District 2029 Forward 75 % 22 Constellation NewEnergy, Inc. 2017 Goat Wind 74.9 % 113 Dow Pipeline Company 2025 Hardin 74.3 % 11 Interstate Power and Light Company 2027 Laredo Ridge 100 % 80 Nebraska Public Power District 2031 Lookout 75 % 29 Southern Maryland Electric Cooperative 2030 Odin 74.9 % 15 Missouri River Energy Services 2028 Pinnacle 100 % 55 Maryland Department of General Services and University System of Maryland 2031 San Juan Mesa 56.3 % 68 Southwestern Public Service Company 2025 Sleeping Bear 75 % 71 Public Service Company of Oklahoma 2032 South Trent 100 % 101 AEP Energy Partners 2029 Spanish Fork 75 % 14 PacifiCorp 2028 Spring Canyon II (b) 90.1 % 29 Platte River Power Authority 2039 Spring Canyon III (b) 90.1 % 25 Platte River Power Authority 2039 Taloga 100 % 130 Oklahoma Gas & Electric 2031 Wildorado 74.9 % 121 Southwestern Public Service Company 2027 1,999 Projects Percentage Ownership Net Capacity (MW) (a) Offtake Counterparty Expiration Thermal Thermal equivalent MWt (c) 100 % 1,315 Various Various NRG Dover Energy Center LLC 100 % 103 NRG Power Marketing LLC 2018 Thermal generation 100 % 20 Various Various Total net capacity (excluding equivalent MWt) (d) 4,558 (a) Net capacity represents the maximum, or rated, generating capacity of the facility multiplied by the Company's percentage ownership in the facility as of June 30, 2016 . (b) Projects are part of tax equity arrangements . (c) For thermal energy, net capacity represents MWt for steam or chilled water and excludes 134 MWt available under the right-to-use provisions contained in agreements between two of the Company's thermal facilities and certain of its customers. (d) Total net capacity excludes 55 MW for RPV Holdco and 45 MW for DGPV Holdco 1 and DGPV Holdco 2, which are consolidated by NRG, as further described in Note 4 , Variable Interest Entities, or VIEs .

Summary of Significant Accoun21

Summary of Significant Accounting Policies Summary of Significant Accounting Policies (Tables)	6 Months Ended
	Jun. 30, 2016
Accounting Policies [Abstract]
Distributions Made to Limited Liability Company (LLC) Member, by Distribution [Table Text Block]	Distributions The following table lists the distributions paid on NRG Yield LLC's Class A, B, C and D units during the six months ended June 30, 2016 : Second Quarter 2016 First Quarter 2016 Distributions per Class A, B, C and D unit $ 0.23 $ 0.225 On July 26, 2016 , the Company declared a distribution on its Class A, Class B, Class C and Class D units of $0.24 per unit payable on September 15, 2016 to unit holders of record as of September 1, 2016 .
Schedule of Change in Noncontrolling Interest [Table Text Block]	The following table reflects the changes in the Company's noncontrolling interest balance: (In millions) Balance as of December 31, 2015 460 Capital contributions from tax equity investors, net of distributions 8 Distributions to NRG for NRG Wind TE Holdco (6 ) Comprehensive loss (35 ) Balance as of June 30, 2016 $ 427

Variable Interest Entities (Tab

Variable Interest Entities (Tables)	6 Months Ended
	Jun. 30, 2016
Schedule of Equity Method Investments [Line Items]
Schedule of Variable Interest Entities [Table Text Block]	Summarized financial information for the Company's consolidated VIEs consisted of the following as of June 30, 2016 : (In millions) NRG Wind TE Holdco Alta Wind TE Holdco Spring Canyon Other current and non-current assets $ 190 $ 27 $ 4 Property, plant and equipment 638 472 102 Intangible assets 2 281 — Total assets 830 780 106 Current and non-current liabilities 215 8 6 Total liabilities 215 8 6 Noncontrolling interest 235 121 70 Net assets less noncontrolling interests $ 380 $ 651 $ 30
GCE Holding LLC [Member]
Schedule of Equity Method Investments [Line Items]
Summarized financial information of equity method investment	The following table presents summarized financial information for GCE Holding LLC: Three months ended June 30, Six months ended June 30, (In millions) 2016 2015 2016 2015 Income Statement Data: Operating revenues $ 18 $ 18 $ 36 $ 40 Operating income 10 11 19 20 Net income $ 6 $ 8 $ 13 $ 14 June 30, 2016 December 31, 2015 Balance Sheet Data: (In millions) Current assets $ 34 $ 36 Non-current assets 408 416 Current liabilities 14 16 Non-current liabilities $ 211 $ 215

Fair Value of Financial Instr23

Fair Value of Financial Instruments (Tables)	6 Months Ended
	Jun. 30, 2016
Fair Value Disclosures [Abstract]
Schedule of Cash Flow Hedges Included in Accumulated Other Comprehensive Income (Loss) [Table Text Block]	The following table summarizes the effects on the Company’s accumulated OCL balance attributable to interest rate swaps designated as cash flow hedge derivatives: Three months ended June 30, Six months ended June 30, 2016 2015 2016 2015 (In millions) Accumulated OCL beginning balance $ (135 ) $ (95 ) $ (85 ) $ (67 ) Reclassified from accumulated OCL to income due to realization of previously deferred amounts 3 4 7 7 Mark-to-market of cash flow hedge accounting contracts (22 ) 23 (76 ) (8 ) Accumulated OCL ending balance $ (154 ) $ (68 ) $ (154 ) $ (68 ) Accumulated OCL attributable to noncontrolling interests (12 ) (3 ) (12 ) (3 ) Accumulated OCL attributable to NRG Yield LLC $ (142 ) $ (65 ) $ (142 ) $ (65 ) Losses expected to be realized from OCL during the next 12 months $ 22 $ 22
Estimated carrying values and fair values of the Company's recorded financial instruments	The estimated carrying amounts and fair values of the Company’s recorded financial instruments not carried at fair market value are as follows: As of June 30, 2016 As of December 31, 2015 Carrying Amount Fair Value Carrying Amount Fair Value (In millions) Assets: Notes receivable, including current portion $ 13 $ 13 $ 17 $ 17 Liabilities: Long-term debt — affiliate 618 590 618 553 Long-term debt — external, including current portion $ 4,171 $ 4,169 $ 4,267 $ 4,181
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]	The Company records its derivative assets and liabilities at fair value on its consolidated balance sheet. There were no derivative asset positions on the Company's consolidated balance sheet as of December 31, 2015 . The following table presents assets and liabilities measured and recorded at fair value on the Company's consolidated balance sheets on a recurring basis and their level within the fair value hierarchy: As of June 30, 2016 As of December 31, 2015 Fair Value (a) Fair Value (a) (In millions) Level 2 Level 2 Derivative assets: Commodity contracts $ 1 $ — Total assets 1 — Derivative liabilities: Commodity contracts — 2 Interest rate contracts 159 98 Total liabilities $ 159 $ 100

Accounting for Derivative Ins24

Accounting for Derivative Instruments and Hedging Activities (Tables)	6 Months Ended
	Jun. 30, 2016
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Net notional volume buy/(sell) of NRG Yield's open derivative transactions broken out by commodity	The following table summarizes the net notional volume buy/(sell) of the Company's open derivative transactions broken out by commodity as of June 30, 2016 , and December 31, 2015 . Total Volume June 30, 2016 December 31, 2015 Commodity Units (In millions) Natural Gas MMBtu 4 4 Interest Dollars $ 1,932 $ 1,991
Fair value within the derivative instrument valuation on the balance sheets	he following table summarizes the fair value within the derivative instrument valuation on the balance sheet: Fair Value Derivative Assets Derivative Liabilities June 30, 2016 June 30, 2016 December 31, 2015 (In millions) Derivatives Designated as Cash Flow Hedges: Interest rate contracts current $ — $ 34 $ 34 Interest rate contracts long-term — 108 56 Total Derivatives Designated as Cash Flow Hedges — 142 90 Derivatives Not Designated as Cash Flow Hedges : Interest rate contracts current — 3 3 Interest rate contracts long-term — 14 5 Commodity contracts current 1 — 2 Total Derivatives Not Designated as Cash Flow Hedges 1 17 10 Total Derivatives $ 1 $ 159 $ 100
Offsetting of derivatives by counterparty master agreement level and collateral received or paid	The Company has elected to present derivative assets and liabilities on the balance sheet on a trade-by-trade basis and does not offset amounts at the counterparty master agreement level. As of June 30, 2016 , and December 31, 2015 , there were no offsetting amounts at the counterparty master agreement level or outstanding collateral paid or received.
Effects of NRG Yield's accumulated OCI balance attributable to interest rate swaps designated as cash flow hedge derivatives, net of tax	The following table summarizes the effects on the Company’s accumulated OCL balance attributable to interest rate swaps designated as cash flow hedge derivatives: Three months ended June 30, Six months ended June 30, 2016 2015 2016 2015 (In millions) Accumulated OCL beginning balance $ (135 ) $ (95 ) $ (85 ) $ (67 ) Reclassified from accumulated OCL to income due to realization of previously deferred amounts 3 4 7 7 Mark-to-market of cash flow hedge accounting contracts (22 ) 23 (76 ) (8 ) Accumulated OCL ending balance $ (154 ) $ (68 ) $ (154 ) $ (68 ) Accumulated OCL attributable to noncontrolling interests (12 ) (3 ) (12 ) (3 ) Accumulated OCL attributable to NRG Yield LLC $ (142 ) $ (65 ) $ (142 ) $ (65 ) Losses expected to be realized from OCL during the next 12 months $ 22 $ 22

Long-term Debt (Tables)

Long-term Debt (Tables)	6 Months Ended
	Jun. 30, 2016
Debt Disclosure [Abstract]
Schedule of long-term debt	This footnote should be read in conjunction with the complete description under Note 9, Long-term Debt , to the Company's audited consolidated financial statements included in the 2015 Form 10-K. Long-term debt consisted of the following: June 30, 2016 December 31, 2015 June 30, 2016, interest rate % (a) Letters of Credit Outstanding at June 30, 2016 (In millions, except rates) Long-term debt - affiliate, due 2019 $ 337 $ 337 3.580 Long-term debt - affiliate, due 2020 281 281 3.325 Senior Notes, due 2024 500 500 5.375 NRG Yield LLC and NRG Yield Operating LLC Revolving Credit Facility, due 2019 (b) 318 306 L+2.75 $ 67 Project-level debt: Alpine, due 2022 151 154 L+1.75 37 Alta Wind I, lease financing arrangement, due 2034 245 252 7.015 16 Alta Wind II, lease financing arrangement, due 2034 194 198 5.696 23 Alta Wind III, lease financing arrangement, due 2034 201 206 6.067 24 Alta Wind IV, lease financing arrangement, due 2034 130 133 5.938 16 Alta Wind V, lease financing arrangement, due 2035 208 213 6.071 27 Alta Realty Investments, due 2031 32 33 7.000 — Alta Wind Asset Management, due 2031 18 19 L+2.375 — Avra Valley, due 2031 58 60 L+1.75 3 Blythe, due 2028 21 21 L+1.625 6 Borrego, due 2025 and 2038 71 72 L+ 2.50/5.65 5 El Segundo Energy Center, due 2023 457 485 L+1.625 - L+2.25 82 Energy Center Minneapolis, due 2017 and 2025 100 108 5.95 -7.25 — Kansas South, due 2031 31 33 L+2.00 4 Laredo Ridge, due 2028 102 104 L+1.875 10 Marsh Landing, due 2017 and 2023 410 418 L+1.75 - L+1.875 45 PFMG and related subsidiaries financing agreement, due 2030 29 29 6.000 — Roadrunner, due 2031 38 40 L+1.625 5 South Trent Wind, due 2020 59 62 L+1.625 10 TA High Desert, due 2020 and 2032 51 52 L+2.50/5.15 8 Tapestry, due 2021 176 181 L+1.625 20 Viento, due 2023 183 189 L+2.75 27 Walnut Creek, due 2023 341 351 L+1.625 60 WCEP Holdings, due 2023 46 46 L+3.00 — Other 1 2 various — Subtotal project-level debt: 3,353 3,461 Total debt 4,789 4,885 Less current maturities 251 241 Less deferred financing costs 47 50 Total long-term debt $ 4,491 $ 4,594 (a) As of June 30, 2016 , L+ equals 3 month LIBOR plus x%, except for the Marsh Landing term loan, Walnut Creek term loan, and NRG Yield LLC and NRG Yield Operating LLC Revolving Credit Facility, where L+ equals 1 month LIBOR plus x% and Kansas South, where L+ equals 6 month LIBOR plus x%. (b) Applicable rate is determined by the Borrower Leverage Ratio, as defined in the credit agreement.

Segment Reporting (Tables)

Segment Reporting (Tables)	6 Months Ended
	Jun. 30, 2016
Segment Reporting [Abstract]
Schedule of Segment Reporting Information, by Segment	Three months ended June 30, 2016 (In millions) Conventional Generation Renewables Thermal Corporate Total Operating revenues $ 85 $ 134 $ 39 $ — $ 258 Cost of operations 16 32 27 — 75 Depreciation and amortization 20 42 5 — 67 General and administrative — — — 3 3 Operating income (loss) 49 60 7 (3 ) 113 Equity in earnings of unconsolidated affiliates 4 14 — — 18 Other income, net — 1 — — 1 Interest expense (12 ) (30 ) (1 ) (15 ) (58 ) Net Income (Loss) $ 41 $ 45 $ 6 $ (18 ) $ 74 Total Assets $ 2,037 $ 4,961 $ 423 $ 16 $ 7,437 Three months ended June 30, 2015 (a) (In millions) Conventional Generation Renewables Thermal Corporate Total Operating revenues $ 85 $ 108 $ 42 $ — $ 235 Cost of operations 15 29 31 — 75 Depreciation and amortization 21 45 4 — 70 General and administrative — — — 3 3 Acquisition-related transaction and integration costs — — — 1 1 Operating income (loss) 49 34 7 (4 ) 86 Equity in earnings of unconsolidated affiliates 4 4 — — 8 Loss on debt extinguishment (7 ) — — — (7 ) Interest expense (13 ) (17 ) (2 ) (11 ) (43 ) Net Income (Loss) $ 33 $ 21 $ 5 $ (15 ) $ 44 (a) Retrospectively adjusted as discussed in Note 1, Nature of Business . Six months ended June 30, 2016 (In millions) Conventional Generation Renewables Thermal Corporate Total Operating revenues $ 164 $ 231 $ 83 $ — $ 478 Cost of operations 39 63 56 — 158 Depreciation and amortization 40 83 10 — 133 General and administrative — — — 5 5 Operating income (loss) 85 85 17 (5 ) 182 Equity in earnings of unconsolidated affiliates 7 13 — 20 Other income, net — 1 — — 1 Interest expense (23 ) (66 ) (3 ) (32 ) (124 ) Net Income (Loss) $ 69 $ 33 $ 14 $ (37 ) $ 79 Six months ended June 30, 2015 (a) (In millions) Conventional Generation Renewables Thermal Corporate Total Operating revenues $ 161 $ 185 $ 89 $ — $ 435 Cost of operations 36 58 65 — 159 Depreciation and amortization 42 86 9 — 137 General and administrative — — — 6 6 Acquisition-related transaction and integration costs — — — 1 1 Operating income (loss) 83 41 15 (7 ) 132 Equity in earnings of unconsolidated affiliates 7 3 — — 10 Other income, net 1 — — — 1 Loss on debt extinguishment (7 ) — — — (7 ) Interest expense (25 ) (63 ) (4 ) (23 ) (115 ) Net Income (Loss) $ 59 $ (19 ) $ 11 $ (30 ) $ 21 (a) Retrospectively adjusted as discussed in Note 1, Nature of Business .

Condensed Consolidating Finan27

Condensed Consolidating Financial Information Condensed Consolidating Financial Information (Tables)	6 Months Ended
	Jun. 30, 2016
Condensed Consolidating Financial Information Disclosure [Abstract]
Condensed Cash Flow Statement [Table Text Block]	NRG YIELD LLC AND SUBSIDIARIES CONDENSED CONSOLIDATING STATEMENTS OF CASH FLOWS For the Six Months Ended June 30, 2016 (Unaudited) NRG Yield LLC Other Guarantor Subsidiaries Non-Guarantor Subsidiaries NRG Yield Operating LLC (Note Issuer) Consolidated (In millions) Net Cash Provided by Operating Activities $ — $ 41 $ 103 $ 55 $ 199 Cash Flows from Investing Activities Intercompany transactions between Yield LLC and subsidiaries 33 — — (33 ) — Capital expenditures — — (11 ) — (11 ) Increase in restricted cash — — (7 ) — (7 ) Decrease in notes receivable — — 4 — 4 Return of investment from unconsolidated affiliates — 1 — 28 29 Net investments in unconsolidated affiliates — (44 ) — (15 ) (59 ) Other — — — 2 2 Net Cash Provided by (Used in) Investing Activities 33 (43 ) (14 ) (18 ) (42 ) Cash Flows from Financing Activities Transfer of funds under intercompany cash management arrangement 49 2 — (51 ) — Net contributions from noncontrolling interests — — — 8 8 Distributions to NRG for NRG Wind TE Holdco — — — (6 ) (6 ) Payment of distributions (83 ) — — — (83 ) Net borrowings from the revolving credit facility — — — 12 12 Net payments for long-term debt — — (109 ) (109 ) Net Cash (Used in) Provided by Financing Activities (34 ) 2 (109 ) (37 ) (178 ) Net Decrease in Cash and Cash Equivalents (1 ) — (20 ) — (21 ) Cash and Cash Equivalents at Beginning of Period 15 — 95 — 110 Cash and Cash Equivalents at End of Period $ 14 $ — $ 75 $ — $ 89 NRG YIELD LLC AND SUBSIDIARIES CONDENSED CONSOLIDATING STATEMENTS OF CASH FLOWS For the Six Months Ended June 30, 2015 (Unaudited) NRG Yield LLC Other Guarantor Subsidiaries Non-Guarantor Subsidiaries (a) NRG Yield Operating LLC (Note Issuer) Consolidated (In millions) Net Cash (Used in) Provided by Operating Activities $ (23 ) $ 10 $ 74 $ 32 $ 93 Cash Flows from Investing Activities Intercompany transactions from Yield LLC to subsidiaries (517 ) — — 517 — Acquisition of businesses, net of cash acquired — — — (37 ) (37 ) Acquisition of Drop Down Assets, net of cash acquired — — — (489 ) (489 ) Capital expenditures — — (8 ) — (8 ) Decrease in restricted cash — — 5 — 5 Decrease in notes receivable — — 3 — 3 Return of investment from unconsolidated affiliates — — — 15 15 Investments in unconsolidated affiliates — (4 ) — (324 ) (328 ) Net Cash Used in Investing Activities (517 ) (4 ) — (318 ) (839 ) Cash Flows from Financing Activities Capital contributions from NRG — — 494 (494 ) — Contributions from noncontrolling interests — — 4 119 123 Proceeds from the issuance of Class C units 600 — — — 600 Payment of distributions (61 ) — — — (61 ) Net payments for long-term debt — — (582 ) — (582 ) Net borrowings from the revolving credit facility — — — 267 267 Transfer of funds under intercompany cash management arrangement (107 ) (6 ) — 113 — Proceeds from long-term debt - affiliate — — — 281 281 Payment of debt issuance costs — — (4 ) — (4 ) Net Cash Provided by (Used in) Financing Activities 432 (6 ) (88 ) 286 624 Net Decrease in Cash and Cash Equivalents (108 ) — (14 ) — (122 ) Cash and Cash Equivalents at Beginning of Period 328 — 101 — 429 Cash and Cash Equivalents at End of Period $ 220 $ — $ 87 $ — $ 307 (a) Retrospectively adjusted as discussed in Note 1, Nature of Business .
Condensed Balance Sheet [Table Text Block]	NRG YIELD LLC AND SUBSIDIARIES CONDENSED CONSOLIDATING BALANCE SHEETS June 30, 2016 (Unaudited) NRG Yield LLC Other Guarantor Subsidiaries Non-Guarantor Subsidiaries NRG Yield Operating LLC Eliminations (a) Consolidated ASSETS (In millions) Current Assets Cash and cash equivalents $ 14 $ — $ 75 $ — $ — $ 89 Restricted cash — — 55 — — 55 Accounts receivable — trade — 3 106 — — 109 Accounts receivable — affiliate — — 1 — — 1 Inventory — 3 32 — — 35 Derivative instruments — — 1 — — 1 Notes receivable — — 7 — — 7 Prepayments and other current assets — — 22 — — 22 Total current assets 14 6 299 — — 319 Net property, plant and equipment — 59 4,888 — — 4,947 Other Assets Investment in consolidated subsidiaries 1,920 561 — 3,202 (5,683 ) — Equity investments in affiliates — 78 165 535 — 778 Notes receivable — — 6 — — 6 Intangible assets, net — 56 1,265 — — 1,321 Other non-current assets — — 64 2 — 66 Total other assets 1,920 695 1,500 3,739 (5,683 ) 2,171 Total Assets $ 1,934 $ 760 $ 6,687 $ 3,739 $ (5,683 ) $ 7,437 (a) All significant intercompany transactions have been eliminated in consolidation. NRG YIELD LLC AND SUBSIDIARIES CONDENSED CONSOLIDATING BALANCE SHEETS (Continued) June 30, 2016 NRG Yield LLC Other Guarantor Subsidiaries Non-Guarantor Subsidiaries NRG Yield Operating LLC Eliminations (a) Consolidated LIABILITIES AND MEMBERS' EQUITY (In millions) Current Liabilities Current portion of long-term debt — external $ — $ — $ 251 $ — $ — $ 251 Accounts payable — 1 16 4 — 21 Accounts payable — affiliate — 6 18 8 32 Derivative instruments — — 37 — — 37 Accrued expenses and other current liabilities — 1 21 17 — 39 Total current liabilities — 8 343 29 — 380 Other Liabilities Long-term debt — external — — 3,061 812 — 3,873 Long-term debt — affiliate — — — 618 — 618 Accounts payable — affiliate — — 20 — — 20 Derivative instruments — — 122 — — 122 Other non-current liabilities — — 63 — — 63 Total non-current liabilities — — 3,266 1,430 — 4,696 Total Liabilities — 8 3,609 1,459 — 5,076 Commitments and Contingencies Members' Equity Contributed capital 1,965 812 3,051 1,945 (5,808 ) 1,965 Retained earnings (accumulated deficit) 111 (57 ) 93 117 (153 ) 111 Accumulated other comprehensive loss (142 ) (3 ) (133 ) (142 ) 278 (142 ) Noncontrolling interest — — 67 360 — 427 Total Members' Equity 1,934 752 3,078 2,280 (5,683 ) 2,361 Total Liabilities and Members’ Equity $ 1,934 $ 760 $ 6,687 $ 3,739 $ (5,683 ) $ 7,437 (a) All significant intercompany transactions have been eliminated in consolidation. NRG YIELD LLC AND SUBSIDIARIES CONDENSED CONSOLIDATING BALANCE SHEETS December 31, 2015 NRG Yield LLC Other Guarantor Subsidiaries Non-Guarantor Subsidiaries NRG Yield Operating LLC Eliminations (a) Consolidated ASSETS (In millions) Current Assets Cash and cash equivalents $ 15 $ — $ 95 $ — $ — $ 110 Restricted cash — — 48 — — 48 Accounts receivable — trade — 1 94 — — 95 Accounts receivable — affiliate 55 4 6 10 (71 ) 4 Inventory — 2 33 — — 35 Notes receivable — — 7 3 (3 ) 7 Prepayments and other current assets — 1 21 — — 22 Total current assets 70 8 304 13 (74 ) 321 Net property, plant and equipment — 61 4,995 — — 5,056 Other Assets Investment in consolidated subsidiaries 1,904 548 — 3,270 (5,722 ) — Equity investments in affiliates — 70 176 552 — 798 Notes receivable — — 10 — — 10 Intangible assets, net — 57 1,305 — — 1,362 Other non-current assets — — 59 2 — 61 Total other assets 1,904 675 1,550 3,824 (5,722 ) 2,231 Total Assets $ 1,974 $ 744 $ 6,849 $ 3,837 $ (5,796 ) $ 7,608 (a) All significant intercompany transactions have been eliminated in consolidation. NRG YIELD LLC AND SUBSIDIARIES CONDENSED CONSOLIDATING BALANCE SHEETS (Continued) December 31, 2015 NRG Yield LLC Other Guarantor Subsidiaries Non-Guarantor Subsidiaries NRG Yield Operating LLC Eliminations (a) Consolidated LIABILITIES AND MEMBERS' EQUITY (In millions) Current Liabilities Current portion of long-term debt — external $ — $ — $ 244 $ — $ (3 ) $ 241 Accounts payable — 1 19 3 — 23 Accounts payable — affiliate — 8 45 104 (72 ) 85 Derivative instruments — 1 38 — — 39 Accrued expenses and other current liabilities — 1 49 17 — 67 Total current liabilities — 11 395 124 (75 ) 455 Other Liabilities Long-term debt — external — — 3,176 800 — 3,976 Long-term debt — affiliate — — — 618 — 618 Derivative instruments — — 61 — — 61 Other non-current liabilities — — 64 — — 64 Total non-current liabilities — — 3,301 1,418 — 4,719 Total Liabilities — 11 3,696 1,542 (75 ) 5,174 Commitments and Contingencies Members' Equity Contributed capital 1,963 821 3,162 1,895 (5,878 ) 1,963 Retained earnings (Accumulated deficit) 93 (85 ) (11 ) 93 3 93 Accumulated other comprehensive loss (82 ) (3 ) (69 ) (82 ) 154 (82 ) Noncontrolling Interest — — 71 389 — 460 Total Members' Equity 1,974 733 3,153 2,295 (5,721 ) 2,434 Total Liabilities and Members’ Equity $ 1,974 $ 744 $ 6,849 $ 3,837 $ (5,796 ) $ 7,608 (a) All significant intercompany transactions have been eliminated in consolidation.
Condensed Statement of Comprehensive Income [Table Text Block]	CONDENSED CONSOLIDATING STATEMENTS OF COMPREHENSIVE INCOME For the Three Months Ended June 30, 2016 (Unaudited) NRG Yield LLC Guarantor Subsidiaries Non-Guarantor Subsidiaries NRG Yield Operating LLC (Note Issuer) Eliminations (a) Consolidated (In millions) Net Income $ 89 $ 27 $ 74 $ 74 $ (190 ) $ 74 Other Comprehensive Loss Unrealized (loss) gain on derivatives (11 ) 1 (18 ) (19 ) 28 (19 ) Other comprehensive (loss) income (11 ) 1 (18 ) (19 ) 28 (19 ) Comprehensive Income 78 28 56 55 (162 ) 55 Less: Comprehensive loss attributable to noncontrolling interests — — — (23 ) — (23 ) Comprehensive Income Attributable to NRG Yield LLC $ 78 $ 28 $ 56 $ 78 $ (162 ) $ 78 (a) All significant intercompany transactions have been eliminated in consolidation. For the Six Months Ended June 30, 2016 (Unaudited) NRG Yield LLC Guarantor Subsidiaries Non-Guarantor Subsidiaries NRG Yield Operating LLC (Note Issuer) Eliminations (a) Consolidated (In millions) Net Income $ 105 $ 25 $ 92 $ 79 $ (222 ) $ 79 Other Comprehensive Loss Unrealized loss on derivatives (60 ) — (64 ) (69 ) 124 (69 ) Other comprehensive loss (60 ) — (64 ) (69 ) 124 (69 ) Comprehensive Income 45 25 28 10 (98 ) 10 Less: Comprehensive loss attributable to noncontrolling interests — — — (35 ) — (35 ) Comprehensive Income Attributable to NRG Yield LLC $ 45 $ 25 $ 28 $ 45 $ (98 ) $ 45 (a) All significant intercompany transactions have been eliminated in consolidation. NRG YIELD LLC AND SUBSIDIARIES CONDENSED CONSOLIDATING STATEMENTS OF COMPREHENSIVE INCOME (LOSS) For the Three Months Ended June 30, 2015 (Unaudited) NRG Yield LLC (a) Other Guarantor Subsidiaries Non-Guarantor Subsidiaries (a) NRG Yield Operating LLC (Note Issuer) (a) Eliminations (a)(b) Consolidated (In millions) Net Income $ 55 $ 7 $ 51 $ 48 $ (117 ) $ 44 Other Comprehensive Income Unrealized gain on derivatives 26 1 26 27 (53 ) 27 Other comprehensive income 26 1 26 27 (53 ) 27 Comprehensive Income 81 8 77 75 (170 ) 71 Less: Comprehensive loss attributable to noncontrolling interests — — (4 ) (6 ) — (10 ) Comprehensive Income attributable to NRG Yield LLC $ 81 $ 8 $ 81 $ 81 $ (170 ) $ 81 (a) Retrospectively adjusted as discussed in Note 1, Nature of Business . (b) All significant intercompany transactions have been eliminated in consolidation. For the Six Months Ended June 30, 2015 (Unaudited) NRG Yield LLC (a) Other Guarantor Subsidiaries Non-Guarantor Subsidiaries (a) NRG Yield Operating LLC (Note Issuer) (a) Eliminations (a) (b) Consolidated (In millions) Net Income (Loss) $ 37 $ (18 ) $ 33 $ 25 $ (56 ) $ 21 Other Comprehensive Loss Unrealized loss on derivatives (1 ) — (1 ) (1 ) 2 (1 ) Other comprehensive loss (1 ) — (1 ) (1 ) 2 (1 ) Comprehensive Income (Loss) 36 (18 ) 32 24 (54 ) 20 Less: Comprehensive loss attributable to noncontrolling interests — — (4 ) (12 ) — (16 ) Comprehensive Income (Loss) attributable to NRG Yield LLC $ 36 $ (18 ) $ 36 $ 36 $ (54 ) $ 36 (a) Retrospectively adjusted as discussed in Note 1, Nature of Business . (b) All significant intercompany transactions have been eliminated in consolidation.
Condensed Income Statement [Table Text Block]	NRG Yield LLC Other Guarantor Subsidiaries Non-Guarantor Subsidiaries NRG Yield Operating LLC (Note Issuer) Eliminations (a) Consolidated (In millions) Operating Revenues Total operating revenues $ — $ 5 $ 253 $ — $ — $ 258 Operating Costs and Expenses Cost of operations — 4 71 — — 75 Depreciation and amortization — 1 66 — — 67 General and administrative — — — 3 — 3 Total operating costs and expenses — 5 137 3 — 145 Operating Income (Loss) — — 116 (3 ) — 113 Other Income (Expense) Equity in earnings of consolidated affiliates 89 24 — 77 (190 ) — Equity in earnings of unconsolidated affiliates — 3 — 15 — 18 Other income, net — — 1 — — 1 Interest expense — — (43 ) (15 ) — (58 ) Total other income (expense), net 89 27 (42 ) 77 (190 ) (39 ) Net Income 89 27 74 74 (190 ) 74 Less: Net loss attributable to noncontrolling interests — — — (15 ) — (15 ) Net Income Attributable to $ 89 $ 27 $ 74 $ 89 $ (190 ) $ 89 NRG YIELD LLC AND SUBSIDIARIES CONDENSED CONSOLIDATING STATEMENTS OF INCOME For the Six Months Ended June 30, 2016 (Unaudited) NRG Yield LLC Other Guarantor Subsidiaries Non-Guarantor Subsidiaries NRG Yield Operating LLC (Note Issuer) Eliminations (a) Consolidated (In millions) Operating Revenues Total operating revenues $ — $ 10 $ 468 $ — $ — $ 478 Operating Costs and Expenses Cost of operations — 7 151 — — 158 Depreciation and amortization — 2 131 — — 133 General and administrative — — — 5 — 5 Total operating costs and expenses — 9 282 5 — 296 Operating Income (Loss) — 1 186 (5 ) — 182 Other Income (Expense) Equity in earnings of consolidated affiliates 105 17 — 100 (222 ) — Equity in earnings (losses) of unconsolidated affiliates — 7 (2 ) 15 — 20 Other income, net — — 1 — — 1 Interest expense — — (93 ) (31 ) — (124 ) Total other income (expense), net 105 24 (94 ) 84 (222 ) (103 ) Net Income 105 25 92 79 (222 ) 79 Less: Net loss attributable to noncontrolling interests — — — (26 ) — (26 ) Net Income Attributable to $ 105 $ 25 $ 92 $ 105 $ (222 ) $ 105 (a) All significant intercompany transactions have been eliminated in consolidation. NRG YIELD LLC AND SUBSIDIARIES CONDENSED CONSOLIDATING STATEMENTS OF INCOME For the Three Months Ended June 30, 2015 (Unaudited) NRG Yield LLC (a) Other Guarantor Subsidiaries Non-Guarantor Subsidiaries (a) NRG Yield Operating LLC (Note Issuer) (a) Eliminations (a) (b) Consolidated (In millions) Operating Revenues (Losses) Total operating revenues (losses) $ — $ 5 $ 231 $ (1 ) $ — $ 235 Operating Costs and Expenses Cost of operations — 3 72 — — 75 Depreciation and amortization — 1 69 — — 70 General and administrative — — — 3 — 3 Acquisition-related transaction and integration costs — — — 1 — 1 Total operating costs and expenses — 4 141 4 — 149 Operating Income (Loss) — 1 90 (5 ) — 86 Other (Expense) Income Equity in earnings of consolidated affiliates 55 6 — 56 (117 ) — Equity in (losses) earnings of unconsolidated affiliates — — (1 ) 9 — 8 Loss on debt extinguishment — — (7 ) — — (7 ) Interest expense — — (31 ) (12 ) — (43 ) Total other income (expense), net 55 6 (39 ) 53 (117 ) (42 ) Net Income 55 7 51 48 (117 ) 44 Less: Net loss attributable to noncontrolling interests — — (4 ) (7 ) — (11 ) Net Income Attributable to NRG Yield LLC $ 55 $ 7 $ 55 $ 55 $ (117 ) $ 55 (a) Retrospectively adjusted as discussed in Note 1, Nature of Business . (b) All significant intercompany transactions have been eliminated in consolidation. NRG YIELD LLC AND SUBSIDIARIES CONDENSED CONSOLIDATING STATEMENTS OF OPERATIONS For the Six Months Ended June 30, 2015 (Unaudited) NRG Yield LLC (a) Other Guarantor Subsidiaries Non-Guarantor Subsidiaries (a) NRG Yield Operating LLC (Note Issuer) (a) Eliminations (a) (b) Consolidated (In millions) Operating Revenues Total operating revenues $ — $ 10 $ 417 $ 8 $ — $ 435 Operating Costs and Expenses Cost of operations — 7 152 — — 159 Depreciation and amortization — 2 135 — — 137 General and administrative — — — 6 — 6 Acquisition-related transaction and integration costs — — — 1 — 1 Total operating costs and expenses — 9 287 7 — 303 Operating Income — 1 130 1 — 132 Other (Expense) Income Equity in income (losses) of consolidated affiliates 37 (19 ) — 38 (56 ) — Equity in earnings of unconsolidated affiliates — — — 10 — 10 Other income, net — — 1 — — 1 Loss on debt extinguishment — — (7 ) — — (7 ) Interest expense — — (91 ) (24 ) — (115 ) Total other expense, net 37 (19 ) (97 ) 24 (56 ) (111 ) Net Income (Loss) 37 (18 ) 33 25 (56 ) 21 Less: Net loss attributable to noncontrolling interests — — (4 ) (12 ) — (16 ) Net Income (Loss) Attributable to NRG Yield LLC $ 37 $ (18 ) $ 37 $ 37 $ (56 ) $ 37 (a) Retrospectively adjusted as discussed in Note 1, Nature of Business . (b) All significant intercompany transactions have been eliminated in consolidation.

Nature of Business (Details)

Nature of Business (Details) $ in Millions		Feb. 19, 2016USD ($)	Nov. 03, 2015USD ($)	Jun. 30, 2015	Jun. 29, 2015USD ($)shares	Jan. 02, 2015USD ($)	Jun. 30, 2016USD ($)MW	Jun. 30, 2015USD ($)		Nov. 02, 2015MW
Nature of Business
Megawatts Thermal Equivalent, Available Under right-to-use Provisions							134
Power Generation Capacity, Megawatts	[1],[2]						4,558
Acquisition of businesses, net of cash acquired | $								$ (37)
Proceeds from the issuance of Class C and Class A units | $							$ 0	600	[3]
Distributed Solar
Nature of Business
Power Generation Capacity, Megawatts	[2]						9
Wind Farms [Member]
Nature of Business
Power Generation Capacity, Megawatts	[2]						1,999
Thermal [Member]
Nature of Business
Percentage of Ownership	[4]						100.00%
Steam and Chilled Water Capacity, Megawatts Thermal Equivalent	[2],[4]						1,315
Power Generation Capacity, Megawatts	[2]						20
NRG Energy Center Dover [Member]
Nature of Business
Percentage of Ownership							100.00%
Conventional Generation [Member]
Nature of Business
Power Generation Capacity, Megawatts	[2]						1,945
Utility-Scale Solar
Nature of Business
Power Generation Capacity, Megawatts	[2]						482
NRG RPV Holdco [Member]
Nature of Business
Power Generation Capacity, Megawatts							55
NRG DGPV Holdco [Member]
Nature of Business
Power Generation Capacity, Megawatts							45
NRG Yield [Member] | NRG Yield [Member]
Nature of Business
Sale of Stock, Number of Shares Issued in Transaction | shares					28,198,000
NRG Yield LLC
Nature of Business
Acquisition of businesses, net of cash acquired | $								0
Proceeds from the issuance of Class C and Class A units | $								$ 600
NRG Yield LLC | NRG
Nature of Business
Limited Liability Company (LLC) or Limited Partnership (LP), Members or Limited Partners, Voting Interest							55.10%
Limited Liability Company (LLC) or Limited Partnership (LP), Members or Limited Partners, Ownership Interest							46.70%
NRG Yield LLC | NRG Yield, Inc. [Member]
Nature of Business
Limited Liability Company (LLC) or Limited Partnership (LP), Members or Limited Partners, Voting Interest				44.90%			44.90%
Limited Liability Company (LLC) or Limited Partnership (LP), Members or Limited Partners, Ownership Interest					53.30%		53.30%
GenConn Middletown | Conventional Generation [Member]
Nature of Business
Equity Method Investment, Ownership Percentage							50.00%
Power Generation Capacity, Megawatts	[2]						95
GenConn Devon [Member] | Conventional Generation [Member]
Nature of Business
Equity Method Investment, Ownership Percentage							50.00%
Power Generation Capacity, Megawatts	[2]						95
Marsh Landing | Conventional Generation [Member]
Nature of Business
Percentage of Ownership							100.00%
Power Generation Capacity, Megawatts	[2]						720
El Segundo [Member] | Conventional Generation [Member]
Nature of Business
Percentage of Ownership							100.00%
Power Generation Capacity, Megawatts	[2]						550
Walnut Creek [Member] | Conventional Generation [Member]
Nature of Business
Percentage of Ownership							100.00%
Power Generation Capacity, Megawatts	[2]						485
Alpine [Member] | Utility-Scale Solar
Nature of Business
Percentage of Ownership							100.00%
Power Generation Capacity, Megawatts	[2]						66
Avenal [Member] | Utility-Scale Solar
Nature of Business
Equity Method Investment, Ownership Percentage							50.00%
Power Generation Capacity, Megawatts	[2]						23
Avra Valley | Utility-Scale Solar
Nature of Business
Percentage of Ownership							100.00%
Power Generation Capacity, Megawatts	[2]						26
NRG Solar Blythe LLC [Member] | Utility-Scale Solar
Nature of Business
Percentage of Ownership							100.00%
Power Generation Capacity, Megawatts	[2]						21
Borrego | Utility-Scale Solar
Nature of Business
Percentage of Ownership							100.00%
Power Generation Capacity, Megawatts	[2]						26
Roadrunner | Utility-Scale Solar
Nature of Business
Percentage of Ownership							100.00%
Power Generation Capacity, Megawatts	[2]						20
CVSR [Member] | Utility-Scale Solar
Nature of Business
Equity Method Investment, Ownership Percentage							48.95%
Power Generation Capacity, Megawatts	[2]						122
TA - High Desert LLC [Member] | Utility-Scale Solar
Nature of Business
Percentage of Ownership							100.00%
Power Generation Capacity, Megawatts	[2]						20
Desert Sunlight [Member] | Utility-Scale Solar
Nature of Business
Percentage of Ownership							25.00%
Kansas South [Member] | Utility-Scale Solar
Nature of Business
Percentage of Ownership							100.00%
Power Generation Capacity, Megawatts	[2]						20
AZ DG Solar Projects | Distributed Solar
Nature of Business
Percentage of Ownership							100.00%
Power Generation Capacity, Megawatts	[2]						5
PFMG DG Solar Projects | Distributed Solar
Nature of Business
Percentage of Ownership							51.00%
Power Generation Capacity, Megawatts	[2]						4
Alta I [Member] | Wind Farms [Member]
Nature of Business
Percentage of Ownership							100.00%
Power Generation Capacity, Megawatts	[2]						150
Alta II [Member] | Wind Farms [Member]
Nature of Business
Percentage of Ownership							100.00%
Power Generation Capacity, Megawatts	[2]						150
Alta III [Member] | Wind Farms [Member]
Nature of Business
Percentage of Ownership							100.00%
Power Generation Capacity, Megawatts	[2]						150
Alta IV [Member] | Wind Farms [Member]
Nature of Business
Percentage of Ownership							100.00%
Power Generation Capacity, Megawatts	[2]						102
Alta V [Member] | Wind Farms [Member]
Nature of Business
Percentage of Ownership							100.00%
Power Generation Capacity, Megawatts	[2]						168
Alta X [Member] | Wind Farms [Member]
Nature of Business
Percentage of Ownership	[5]						100.00%
Power Generation Capacity, Megawatts	[2],[5]						137
Alta XI [Member] | Wind Farms [Member]
Nature of Business
Percentage of Ownership	[5]						100.00%
Power Generation Capacity, Megawatts	[2],[5]						90
South Trent | Wind Farms [Member]
Nature of Business
Percentage of Ownership							100.00%
Power Generation Capacity, Megawatts	[2]						101
Spanish Fork [Member] | Wind Farms [Member]
Nature of Business
Percentage of Ownership							75.00%
Power Generation Capacity, Megawatts	[2]						14
Laredo Ridge [Member] | Wind Farms [Member]
Nature of Business
Percentage of Ownership							100.00%
Power Generation Capacity, Megawatts	[2]						80
Taloga [Member] | Wind Farms [Member]
Nature of Business
Percentage of Ownership							100.00%
Power Generation Capacity, Megawatts	[2]						130
Pinnacle [Member] | Wind Farms [Member]
Nature of Business
Percentage of Ownership							100.00%
Power Generation Capacity, Megawatts	[2]						55
Buffalo Bear [Member] | Wind Farms [Member]
Nature of Business
Percentage of Ownership							100.00%
Power Generation Capacity, Megawatts	[2]						19
Spring Canyon II [Member] | Wind Farms [Member]
Nature of Business
Percentage of Ownership	[5]						90.10%
Power Generation Capacity, Megawatts	[2],[5]						29
Spring Canyon III [Member] | Wind Farms [Member]
Nature of Business
Percentage of Ownership	[5]						90.10%
Power Generation Capacity, Megawatts	[2],[5]						25
Crosswinds [Member] | Wind Farms [Member]
Nature of Business
Percentage of Ownership							74.30%
Power Generation Capacity, Megawatts	[2]						16
Elbow Creek [Member] | Wind Farms [Member]
Nature of Business
Percentage of Ownership							75.00%
Power Generation Capacity, Megawatts	[2]						92
Elkhorn Ridge Wind, LLC [Member] | Wind Farms [Member]
Nature of Business
Percentage of Ownership							50.30%
Power Generation Capacity, Megawatts	[2]						41
Forward [Member] | Wind Farms [Member]
Nature of Business
Percentage of Ownership							75.00%
Power Generation Capacity, Megawatts	[2]						22
Goat Wind [Member] | Wind Farms [Member]
Nature of Business
Percentage of Ownership							74.90%
Power Generation Capacity, Megawatts	[2]						113
Hardin [Member] | Wind Farms [Member]
Nature of Business
Percentage of Ownership							74.30%
Power Generation Capacity, Megawatts	[2]						11
Lookout [Member] | Wind Farms [Member]
Nature of Business
Percentage of Ownership							75.00%
Power Generation Capacity, Megawatts	[2]						29
Odin Wind Farm [Member] | Wind Farms [Member]
Nature of Business
Percentage of Ownership							74.90%
Power Generation Capacity, Megawatts	[2]						15
San Juan Mesa Wind Project, LLC [Member] | Wind Farms [Member]
Nature of Business
Percentage of Ownership							56.30%
Power Generation Capacity, Megawatts	[2]						68
Sleeping Bear [Member] | Wind Farms [Member]
Nature of Business
Percentage of Ownership							75.00%
Power Generation Capacity, Megawatts	[2]						71
Wildorado [Member] | Wind Farms [Member]
Nature of Business
Percentage of Ownership							74.90%
Power Generation Capacity, Megawatts	[2]						121
NRG Energy Center Dover [Member] | Thermal [Member]
Nature of Business
Power Generation Capacity, Megawatts	[2]						103
November 2015 Drop Down Assets [Member]
Nature of Business
Business Acquisition, Percentage of Voting Interests Acquired										75.00%
Payments to Acquire Businesses, Gross | $		$ 207	$ 209
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Long-term Debt | $			$ 193
Business Acquisition, Consideration Transferred, Working Capital | $		$ 2
November 2015 Drop Down Assets [Member] | Wind Farms [Member]
Nature of Business
Power Generation Capacity, Megawatts										814
January 2015 Drop Down Assets [Member]
Nature of Business
Acquisition of businesses, net of cash acquired | $						$ (489)
Business Combination, Consideration Transferred, Liabilities Incurred | $						737
Business Acquisition, Consideration Transferred, Working Capital | $						$ 9
Southern California Edison [Member] | Desert Sunlight [Member] | Utility-Scale Solar
Nature of Business
Power Generation Capacity, Megawatts	[2]						63
Pacific Gas and Electric [Member] | Desert Sunlight [Member] | Utility-Scale Solar
Nature of Business
Power Generation Capacity, Megawatts	[2]						75
Common Class D [Member] | NRG Yield LLC
Nature of Business
Sale of Stock, Percentage of Ownership after Transaction							100.00%
Common Class B [Member] | NRG Yield LLC
Nature of Business
Sale of Stock, Percentage of Ownership after Transaction							100.00%
Common Class A [Member] | NRG Yield LLC
Nature of Business
Sale of Stock, Percentage of Ownership after Transaction							100.00%
Common Class C [Member]
Nature of Business
Proceeds from the issuance of Class C and Class A units | $					$ 599
[1]	(d) Total net capacity excludes 55 MW for RPV Holdco and 45 MW for DGPV Holdco 1 and DGPV Holdco 2, which are consolidated by NRG, as further described in Note 4, Variable Interest Entities, or VIEs.
[2]	a) Net capacity represents the maximum, or rated, generating capacity of the facility multiplied by the Company's percentage ownership in the facility as of June 30, 2016.
[3]	(a) Retrospectively adjusted as discussed in Note 1, Nature of Business.
[4]	(c) For thermal energy, net capacity represents MWt for steam or chilled water and excludes 134 MWt available under the right-to-use provisions contained in agreements between two of the Company's thermal facilities and certain of its customers.
[5]	(b) Projects are part of tax equity arrangements.

Summary of Significant Accoun29

Summary of Significant Accounting Policies (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended				6 Months Ended
	Jun. 30, 2016	Mar. 31, 2016	Jun. 30, 2015	[2]	Jun. 30, 2016	Jun. 30, 2015		Dec. 31, 2015
Summary of Significant Accounting Policies [Line Items]
Noncontrolling interest	$ 427				$ 427			$ 460
Capital contributions from tax equity investors, net of distributions					8	$ 123	[1]
Distributions to NRG for NRG Wind TE Holdco					(6)	0	[1]
Comprehensive loss	$ (23)		$ (10)		$ (35)	$ (16)	[2]
Dividends Payable, Date Declared					Jul. 26, 2016
Common Stock, Dividends, Per Share, Declared					$ 0
Dividends Payable, Date to be Paid					Sep. 15, 2016
Dividends Payable, Date of Record					Sep. 1, 2016
Dividends Per Class A Common Share	$ 0.23
Financial Institutions [Member]
Summary of Significant Accounting Policies [Line Items]
Capital contributions from tax equity investors, net of distributions					$ 8
Common Class A [Member]
Summary of Significant Accounting Policies [Line Items]
Dividends Per Class A Common Share		$ 0.225
[1]	(a) Retrospectively adjusted as discussed in Note 1, Nature of Business.
[2]	(a) Retrospectively adjusted as discussed in Note 1, Nature of Business.

Business Acquisitions Business

Business Acquisitions Business Acquisitions - November 2015 Drop Down (Details)		Feb. 19, 2016USD ($)	Nov. 03, 2015USD ($)	Jun. 30, 2016MW	Nov. 02, 2015USD ($)MW
Business Acquisition [Line Items]
Power Generation Capacity, Megawatts | MW	[1],[2]			4,558
November 2015 Drop Down Assets [Member]
Business Acquisition [Line Items]
Business Acquisition, Percentage of Voting Interests Acquired					75.00%
Payments to Acquire Businesses, Gross		$ 207,000,000	$ 209,000,000
Business Acquisition, Consideration Transferred, Working Capital		$ 2,000,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Long-term Debt			$ 193,000,000
Number of Facilities					12
Financial Institutions [Member] | November 2015 Drop Down Assets [Member]
Business Acquisition [Line Items]
Taxable Income Allocation, Pre-Flip			99.00%
Taxable Income Allocation, Post-Flip			8.53%
Business Combination, Acquisition of Less than 100 Percent, Noncontrolling Interest, Fair Value			$ 159,000,000
Pre-Flip Point [Member] | November 2015 Drop Down Assets [Member]
Business Acquisition [Line Items]
Percentage of Cash Available for Distributions			75.00%
Post-Flip Point [Member] | November 2015 Drop Down Assets [Member]
Business Acquisition [Line Items]
Percentage of Cash Available for Distributions			68.60%
Pre-determined Date Through Flip Point If Flip Has Not Occured [Member] | Financial Institutions [Member] | November 2015 Drop Down Assets [Member]
Business Acquisition [Line Items]
Percentage of Cash Available for Distributions			100.00%
Wind Farms [Member]
Business Acquisition [Line Items]
Power Generation Capacity, Megawatts | MW	[2]			1,999
Wind Farms [Member] | November 2015 Drop Down Assets [Member]
Business Acquisition [Line Items]
Power Generation Capacity, Megawatts | MW					814
[1]	(d) Total net capacity excludes 55 MW for RPV Holdco and 45 MW for DGPV Holdco 1 and DGPV Holdco 2, which are consolidated by NRG, as further described in Note 4, Variable Interest Entities, or VIEs.
[2]	a) Net capacity represents the maximum, or rated, generating capacity of the facility multiplied by the Company's percentage ownership in the facility as of June 30, 2016.

Business Acquisitions Busines31

Business Acquisitions Business Acquisitions - Desert Sunlight/Spring Canyon/Fuel Cell (Details)		Jun. 30, 2015USD ($)	May 08, 2015	Apr. 30, 2015	Jun. 30, 2016MW	Jun. 29, 2015USD ($)	May 07, 2015
Business Acquisition [Line Items]
Power Generation Capacity, Megawatts	[1],[2]				4,558
Utility-Scale Solar [Member]
Business Acquisition [Line Items]
Power Generation Capacity, Megawatts	[2]				482
Wind Farms [Member]
Business Acquisition [Line Items]
Power Generation Capacity, Megawatts	[2]				1,999
Wind Farms [Member] | Spring Canyon [Member]
Business Acquisition [Line Items]
Business Acquisition, Percentage of Voting Interests Acquired							90.10%
Wind Farms [Member] | Spring Canyon II [Member]
Business Acquisition [Line Items]
Power Generation Capacity, Megawatts					32
Wind Farms [Member] | Spring Canyon III [Member]
Business Acquisition [Line Items]
Power Generation Capacity, Megawatts					28
Thermal [Member]
Business Acquisition [Line Items]
Percentage of Ownership	[3]				100.00%
Power Generation Capacity, Megawatts	[2]				20
Desert Sunlight [Member]
Business Acquisition [Line Items]
Number of Facilities | $						2
Payments to Acquire Equity Method Investments | $		$ 285,000,000
Power Generation Capacity, Megawatts					550
Desert Sunlight [Member] | Utility-Scale Solar [Member]
Business Acquisition [Line Items]
Equity Method Investment, Ownership Percentage					25.00%
UB Fuel Cell [Member] | Thermal [Member]
Business Acquisition [Line Items]
Power Generation Capacity, Megawatts					1.4
Supply Commitment [Member] | Spring Canyon [Member]
Business Acquisition [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life			24 years
Supply Commitment [Member] | UB Fuel Cell [Member]
Business Acquisition [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life				12 years
Southern California Edison [Member] | Supply Commitment [Member] | Desert Sunlight [Member]
Business Acquisition [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		20 years
Pacific Gas and Electric [Member] | Supply Commitment [Member] | Desert Sunlight [Member]
Business Acquisition [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		25 years
[1]	(d) Total net capacity excludes 55 MW for RPV Holdco and 45 MW for DGPV Holdco 1 and DGPV Holdco 2, which are consolidated by NRG, as further described in Note 4, Variable Interest Entities, or VIEs.
[2]	a) Net capacity represents the maximum, or rated, generating capacity of the facility multiplied by the Company's percentage ownership in the facility as of June 30, 2016.
[3]	(c) For thermal energy, net capacity represents MWt for steam or chilled water and excludes 134 MWt available under the right-to-use provisions contained in agreements between two of the Company's thermal facilities and certain of its customers.

Business Acquisitions Busines32

Business Acquisitions Business Acquisitions - January 2015 Drop Downs (Details) $ in Millions		Jan. 02, 2015USD ($)	Jun. 30, 2015USD ($)	Jun. 30, 2016USD ($)MW	Dec. 31, 2015USD ($)
Business Acquisition [Line Items]
Power Generation Capacity, Megawatts | MW	[1],[2]			4,558
Acquisition of businesses, net of cash acquired			$ (37)
Total current assets				$ 319	$ 321
Net property, plant and equipment				4,947	5,056
Total Assets				7,437	7,608
Long-term Debt				4,789	4,885
Total Liabilities				$ 5,076	$ 5,174
January 2015 Drop Down Assets [Member]
Business Acquisition [Line Items]
Acquisition of businesses, net of cash acquired		$ (489)
Business Acquisition, Consideration Transferred, Working Capital		9
Business Combination, Consideration Transferred, Liabilities Incurred		737
Business Combination, Separately Recognized Transactions, Net Gains and Losses		61
AOCI Including Portion Attributable to Noncontrolling Interest, before Tax		$ 23
Conventional Generation [Member]
Business Acquisition [Line Items]
Power Generation Capacity, Megawatts | MW	[2]			1,945
Conventional Generation [Member] | Walnut Creek [Member]
Business Acquisition [Line Items]
Power Generation Capacity, Megawatts | MW	[2]			485
Wind Farms [Member]
Business Acquisition [Line Items]
Power Generation Capacity, Megawatts | MW	[2]			1,999
Wind Farms [Member] | Pinnacle [Member]
Business Acquisition [Line Items]
Power Generation Capacity, Megawatts | MW	[2]			55
Wind Farms [Member] | Buffalo Bear [Member]
Business Acquisition [Line Items]
Power Generation Capacity, Megawatts | MW	[2]			19
Wind Farms [Member] | Taloga [Member]
Business Acquisition [Line Items]
Power Generation Capacity, Megawatts | MW	[2]			130
Wind Farms [Member] | Laredo Ridge [Member]
Business Acquisition [Line Items]
Power Generation Capacity, Megawatts | MW	[2]			80
[1]	(d) Total net capacity excludes 55 MW for RPV Holdco and 45 MW for DGPV Holdco 1 and DGPV Holdco 2, which are consolidated by NRG, as further described in Note 4, Variable Interest Entities, or VIEs.
[2]	a) Net capacity represents the maximum, or rated, generating capacity of the facility multiplied by the Company's percentage ownership in the facility as of June 30, 2016.

Business Acquisitions Busines33

Business Acquisitions Business Acquisitions - Alta Wind (Details) $ in Millions		6 Months Ended
		Jun. 30, 2016USD ($)MW	Jun. 30, 2015USD ($)
Business Acquisition [Line Items]
Power Generation Capacity, Megawatts | MW	[1],[2]	4,558
Business Combination, Consideration Transferred			$ 37
Proceeds from the issuance of Class C and Class A units		$ 0	600	[3]
NRG Yield Operating LLC [Member]
Business Acquisition [Line Items]
Business Combination, Consideration Transferred			37
Proceeds from the issuance of Class C and Class A units			$ 0
5.375% Senior Notes due in 2024 [Member]
Business Acquisition [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	[4]	5.375%
[1]	(d) Total net capacity excludes 55 MW for RPV Holdco and 45 MW for DGPV Holdco 1 and DGPV Holdco 2, which are consolidated by NRG, as further described in Note 4, Variable Interest Entities, or VIEs.
[2]	a) Net capacity represents the maximum, or rated, generating capacity of the facility multiplied by the Company's percentage ownership in the facility as of June 30, 2016.
[3]	(a) Retrospectively adjusted as discussed in Note 1, Nature of Business.
[4]	As of June 30, 2016, L+ equals 3 month LIBOR plus x%, except for the Marsh Landing term loan, Walnut Creek term loan, and NRG Yield LLC and NRG Yield Operating LLC Revolving Credit Facility, where L+ equals 1 month LIBOR plus x% and Kansas South, where L+ equals 6 month LIBOR plus x%.

Business Acquisitions Busines34

Business Acquisitions Business Acquisitions - June 2014 Drop Downs (Details) $ in Millions		6 Months Ended
		Jun. 30, 2015USD ($)	Jun. 30, 2016MW
Business Acquisition [Line Items]
Power Generation Capacity, Megawatts | MW	[1],[2]		4,558
Business Combination, Consideration Transferred | $		$ 37
[1]	(d) Total net capacity excludes 55 MW for RPV Holdco and 45 MW for DGPV Holdco 1 and DGPV Holdco 2, which are consolidated by NRG, as further described in Note 4, Variable Interest Entities, or VIEs.
[2]	a) Net capacity represents the maximum, or rated, generating capacity of the facility multiplied by the Company's percentage ownership in the facility as of June 30, 2016.

Business Acquisitions CVSR (Det

Business Acquisitions CVSR (Details) - CVSR [Member] - Subsequent Event [Member] $ in Millions	Aug. 08, 2016USD ($)
Subsequent Event [Line Items]
Business Acquisition, Percentage of Voting Interests Acquired	51.05%
Payments to Acquire Businesses, Gross	$ 78.5

Variable Interest Entities Vari

Variable Interest Entities Variable Interest Entities - Alta TE Holdco (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	[1]	Dec. 31, 2015
Schedule of Equity Method Investments [Line Items]
Total other assets	$ 2,171			$ 2,231
Net contributions from noncontrolling interests	8	$ 123
Net property, plant and equipment	4,947			5,056
Total Assets	7,437			7,608
Total Liabilities	5,076			$ 5,174
Financial Institutions [Member]
Schedule of Equity Method Investments [Line Items]
Net contributions from noncontrolling interests	8
Alta X and XI TE Holdco [Member]
Schedule of Equity Method Investments [Line Items]
Total other assets	27
Net property, plant and equipment	472
Intangible Assets, Net (Excluding Goodwill)	281
Total Assets	780
Total Liabilities	8
Noncontrolling Interest in Variable Interest Entity	121
Net Assets	$ 651
[1]	(a) Retrospectively adjusted as discussed in Note 1, Nature of Business.

Variable Interest Entities Va37

Variable Interest Entities Variable Interest Entities - DGPV (Details) $ in Millions		May 08, 2015generatingunitMW	Jun. 30, 2016USD ($)MW	Jun. 30, 2015USD ($)		Dec. 31, 2015USD ($)
Schedule of Equity Method Investments [Line Items]
Power Generation Capacity, Megawatts | MW	[1],[2]		4,558
Payments to Acquire Businesses and Interest in Affiliates			$ 59	$ 328	[3]
Business Combination, Consideration Transferred				$ 37
Equity investments in affiliates			778			$ 798
NRG DGPV Holdco [Member]
Schedule of Equity Method Investments [Line Items]
Equity investments in affiliates			78
Tax Equity Financed Portfolio of Leases - Community Solar [Member] | NRG DGPV Fund 1 [Member]
Schedule of Equity Method Investments [Line Items]
Power Generation Capacity, Megawatts | MW		8
Remaining Lease Term		20 years
Number of Solar Leases in Portfolio | generatingunit		10
Tax Equity Financed Portfolio of Leases - Commercial PV [Member] | NRG DGPV Fund 1 [Member]
Schedule of Equity Method Investments [Line Items]
Power Generation Capacity, Megawatts | MW		37
Remaining Lease Term		19 years
Number of Solar Leases in Portfolio | generatingunit		12
Maximum [Member] | Tax Equity Financed Portfolio of Leases [Member] | NRG DGPV Fund 2 [Member]
Schedule of Equity Method Investments [Line Items]
Equity investments in affiliates			50
Maximum [Member] | Tax Equity Financed Portfolio of Leases [Member] | NRG DGPV Fund 1 [Member]
Schedule of Equity Method Investments [Line Items]
Equity investments in affiliates			$ 100
[1]	(d) Total net capacity excludes 55 MW for RPV Holdco and 45 MW for DGPV Holdco 1 and DGPV Holdco 2, which are consolidated by NRG, as further described in Note 4, Variable Interest Entities, or VIEs.
[2]	a) Net capacity represents the maximum, or rated, generating capacity of the facility multiplied by the Company's percentage ownership in the facility as of June 30, 2016.
[3]	(a) Retrospectively adjusted as discussed in Note 1, Nature of Business.

Variable Interest Entities Va38

Variable Interest Entities Variable Interest Entities - RPV (Details) $ in Millions		6 Months Ended
		Jun. 30, 2016USD ($)generatingunitMW	Aug. 05, 2016USD ($)	Dec. 31, 2015USD ($)
Schedule of Equity Method Investments [Line Items]
Power Generation Capacity, Megawatts | MW	[1],[2]	4,558
Equity investments in affiliates		$ 778		$ 798
NRG RPV Holdco [Member]
Schedule of Equity Method Investments [Line Items]
Equity investments in affiliates		$ 67
Existing Portfolio of Leases [Member] | NRG RPV Holdco [Member]
Schedule of Equity Method Investments [Line Items]
Number of Solar Leases in Portfolio | generatingunit		2,200
Power Generation Capacity, Megawatts | MW		17
Remaining Lease Term		17 years
Tax Equity Financed Portfolio of Leases [Member] | NRG RPV Holdco [Member]
Schedule of Equity Method Investments [Line Items]
Number of Solar Leases in Portfolio | generatingunit		5,500
Power Generation Capacity, Megawatts | MW		38
Minimum [Member] | Tax Equity Financed Portfolio of Leases [Member] | NRG RPV Holdco [Member]
Schedule of Equity Method Investments [Line Items]
Remaining Lease Term		17 years
Maximum [Member] | Tax Equity Financed Portfolio of Leases [Member] | NRG RPV Holdco [Member]
Schedule of Equity Method Investments [Line Items]
Remaining Lease Term		20 years
Equity investments in affiliates		$ 150
Capital Contributions From Partners in Equity Method Investment		$ 100
NRG RPV Holdco [Member]
Schedule of Equity Method Investments [Line Items]
Power Generation Capacity, Megawatts | MW		55
Subsequent Event [Member] | Maximum [Member] | Tax Equity Financed Portfolio of Leases [Member] | NRG RPV Holdco [Member]
Schedule of Equity Method Investments [Line Items]
Capital Contributions From Partners in Equity Method Investment			$ 60
[1]	(d) Total net capacity excludes 55 MW for RPV Holdco and 45 MW for DGPV Holdco 1 and DGPV Holdco 2, which are consolidated by NRG, as further described in Note 4, Variable Interest Entities, or VIEs.
[2]	a) Net capacity represents the maximum, or rated, generating capacity of the facility multiplied by the Company's percentage ownership in the facility as of June 30, 2016.

Variable Interest Entities Va39

Variable Interest Entities Variable Interest Entities - GenConn (Details) $ in Millions		3 Months Ended			6 Months Ended
		Jun. 30, 2016USD ($)facilityMW	Jun. 30, 2015USD ($)		Jun. 30, 2016USD ($)facilityMW	Jun. 30, 2015USD ($)		Dec. 31, 2015USD ($)
Schedule of Equity Method Investments [Line Items]
Net contributions from noncontrolling interests					$ 8	$ 123	[1]
Power Generation Capacity, Megawatts | MW	[2],[3]	4,558			4,558
Equity investments in affiliates		$ 778			$ 778			$ 798
Long-term Debt		4,789			4,789			4,885
Total operating revenues		258	$ 235	[4],[5]	478	435	[4],[5]
Operating income (loss)		113	86	[4],[5]	182	132	[4],[5]
Net Income (Loss)		74	44	[4],[5]	79	21	[1],[4],[5]
Total current assets		319			319			321
Current Liabilities		380			380			455
Total non-current liabilities		4,696			4,696			4,719
NRG RPV Holdco [Member]
Schedule of Equity Method Investments [Line Items]
Equity investments in affiliates		$ 67			$ 67
GCE Holding LLC [Member]
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Ownership Percentage		50.00%			50.00%
Equity investments in affiliates		$ 108			$ 108
Total operating revenues		18	18		36	40
Operating income (loss)		10	11		19	(20)
Net Income (Loss)		6	$ 8		13	$ 14
Total current assets		34			34			36
Assets, Noncurrent		408			408			416
Current Liabilities		14			14			16
Total non-current liabilities		$ 211			$ 211			$ 215
Gen Conn Energy LLC [Member]
Schedule of Equity Method Investments [Line Items]
Power Generation Units, Number | facility		2			2
Power Generation Capacity, Megawatts | MW		190			190
Tax Equity Financed Portfolio of Leases [Member] | NRG RPV Holdco [Member]
Schedule of Equity Method Investments [Line Items]
Power Generation Capacity, Megawatts | MW		38			38
Tax Equity Financed Portfolio of Leases [Member] | Maximum [Member] | NRG RPV Holdco [Member]
Schedule of Equity Method Investments [Line Items]
Equity investments in affiliates		$ 150			$ 150
[1]	(a) Retrospectively adjusted as discussed in Note 1, Nature of Business.
[2]	(d) Total net capacity excludes 55 MW for RPV Holdco and 45 MW for DGPV Holdco 1 and DGPV Holdco 2, which are consolidated by NRG, as further described in Note 4, Variable Interest Entities, or VIEs.
[3]	a) Net capacity represents the maximum, or rated, generating capacity of the facility multiplied by the Company's percentage ownership in the facility as of June 30, 2016.
[4]	(a) Retrospectively adjusted as discussed in Note 1, Nature of Business.
[5]	(a) Retrospectively adjusted as discussed in Note 1, Nature of Business.

Variable Interest Entities Va40

Variable Interest Entities Variable Interest Entities - Desert Sunlight (Details)		3 Months Ended			6 Months Ended
		Jun. 30, 2016USD ($)MW	Jun. 30, 2015USD ($)	[1],[2]	Jun. 30, 2016USD ($)MW	Jun. 30, 2015USD ($)	[1],[2]	Dec. 31, 2015USD ($)	Jun. 29, 2015USD ($)
Schedule of Equity Method Investments [Line Items]
Total operating revenues		$ 258,000,000	$ 235,000,000		$ 478,000,000	$ 435,000,000
Operating Income (Loss)		(113,000,000)	(86,000,000)		(182,000,000)	(132,000,000)
Net Income (Loss)		74,000,000	$ 44,000,000		79,000,000	$ 21,000,000	[3]
Total current assets		319,000,000			319,000,000			$ 321,000,000
Current Liabilities		380,000,000			380,000,000			455,000,000
Total non-current liabilities		$ 4,696,000,000			$ 4,696,000,000			4,719,000,000
Power Generation Capacity, Megawatts | MW	[4],[5]	4,558			4,558
Equity investments in affiliates		$ 778,000,000			$ 778,000,000			$ 798,000,000
Desert Sunlight [Member]
Schedule of Equity Method Investments [Line Items]
Number of Facilities									2
Power Generation Capacity, Megawatts | MW		550			550
Utility-Scale Solar [Member]
Schedule of Equity Method Investments [Line Items]
Power Generation Capacity, Megawatts | MW	[5]	482			482
[1]	(a) Retrospectively adjusted as discussed in Note 1, Nature of Business.
[2]	(a) Retrospectively adjusted as discussed in Note 1, Nature of Business.
[3]	(a) Retrospectively adjusted as discussed in Note 1, Nature of Business.
[4]	(d) Total net capacity excludes 55 MW for RPV Holdco and 45 MW for DGPV Holdco 1 and DGPV Holdco 2, which are consolidated by NRG, as further described in Note 4, Variable Interest Entities, or VIEs.
[5]	a) Net capacity represents the maximum, or rated, generating capacity of the facility multiplied by the Company's percentage ownership in the facility as of June 30, 2016.

Variable Interest Entities Va41

Variable Interest Entities Variable Interest Entities (Details) - USD ($) $ in Millions	Jun. 30, 2016	Dec. 31, 2015
Schedule of Equity Method Investments [Line Items]
Total other assets	$ 2,171	$ 2,231
Net property, plant and equipment	4,947	5,056
Total Assets	7,437	7,608
Liabilities	5,076	$ 5,174
Alta X and XI TE Holdco [Member]
Schedule of Equity Method Investments [Line Items]
Total other assets	27
Net property, plant and equipment	472
Intangible Assets, Net (Excluding Goodwill)	281
Total Assets	780
Liabilities	8
Noncontrolling Interest in Variable Interest Entity	121
Net Assets	651
November 2015 Drop Down Assets [Member]
Schedule of Equity Method Investments [Line Items]
Total other assets	190
Net property, plant and equipment	638
Intangible Assets, Net (Excluding Goodwill)	2
Total Assets	830
Liabilities	215
Noncontrolling Interest in Variable Interest Entity	235
Net Assets	$ 380

Variable Interest Entities Spri

Variable Interest Entities Spring Canyon (Details) $ in Millions		Jun. 30, 2016USD ($)MW	Dec. 31, 2015USD ($)	May 07, 2015
Schedule of Equity Method Investments [Line Items]
Total other assets		$ 2,171	$ 2,231
Net property, plant and equipment		4,947	5,056
Total Assets		7,437	7,608
Liabilities		$ 5,076	$ 5,174
Power Generation Capacity, Megawatts | MW	[1],[2]	4,558
Spring Canyon [Member]
Schedule of Equity Method Investments [Line Items]
Total other assets		$ 4
Net property, plant and equipment		102
Intangible Assets, Net (Excluding Goodwill)		0
Total Assets		106
Liabilities		6
Noncontrolling Interest in Variable Interest Entity		70
Net Assets		$ 30
Wind Farms [Member]
Schedule of Equity Method Investments [Line Items]
Power Generation Capacity, Megawatts | MW	[2]	1,999
Wind Farms [Member] | Spring Canyon II [Member]
Schedule of Equity Method Investments [Line Items]
Power Generation Capacity, Megawatts | MW		32
Wind Farms [Member] | Spring Canyon [Member]
Schedule of Equity Method Investments [Line Items]
Business Acquisition, Percentage of Voting Interests Acquired				90.10%
Wind Farms [Member] | Spring Canyon III [Member]
Schedule of Equity Method Investments [Line Items]
Power Generation Capacity, Megawatts | MW		28
[1]	(d) Total net capacity excludes 55 MW for RPV Holdco and 45 MW for DGPV Holdco 1 and DGPV Holdco 2, which are consolidated by NRG, as further described in Note 4, Variable Interest Entities, or VIEs.
[2]	a) Net capacity represents the maximum, or rated, generating capacity of the facility multiplied by the Company's percentage ownership in the facility as of June 30, 2016.

Variable Interest Entities NRG

Variable Interest Entities NRG Wind TE Holdco (Details)		Feb. 19, 2016USD ($)	Nov. 03, 2015USD ($)	Jun. 30, 2016USD ($)MW	Dec. 31, 2015USD ($)	Nov. 02, 2015USD ($)MW
Schedule of Equity Method Investments [Line Items]
Total other assets				$ 2,171,000,000	$ 2,231,000,000
Total Assets				7,437,000,000	7,608,000,000
Liabilities				$ 5,076,000,000	$ 5,174,000,000
Power Generation Capacity, Megawatts | MW	[1],[2]			4,558
November 2015 Drop Down Assets [Member]
Schedule of Equity Method Investments [Line Items]
Net Assets				$ 380,000,000
Intangible Assets, Net (Excluding Goodwill)				2,000,000
Total other assets				190,000,000
Total Assets				830,000,000
Liabilities				$ 215,000,000
November 2015 Drop Down Assets [Member]
Schedule of Equity Method Investments [Line Items]
Number of Facilities						12
Payments to Acquire Businesses, Gross		$ 207,000,000	$ 209,000,000
Business Acquisition, Consideration Transferred, Working Capital		$ 2,000,000
Pre-Flip Point [Member] | November 2015 Drop Down Assets [Member]
Schedule of Equity Method Investments [Line Items]
Percentage of Cash Available for Distributions			75.00%
Post-Flip Point [Member] | November 2015 Drop Down Assets [Member]
Schedule of Equity Method Investments [Line Items]
Percentage of Cash Available for Distributions			68.60%
Wind Farms [Member]
Schedule of Equity Method Investments [Line Items]
Power Generation Capacity, Megawatts | MW	[2]			1,999
Wind Farms [Member] | November 2015 Drop Down Assets [Member]
Schedule of Equity Method Investments [Line Items]
Power Generation Capacity, Megawatts | MW						814
Financial Institutions [Member] | November 2015 Drop Down Assets [Member]
Schedule of Equity Method Investments [Line Items]
Business Combination, Acquisition of Less than 100 Percent, Noncontrolling Interest, Fair Value			$ 159,000,000
Taxable Income Allocation, Pre-Flip			99.00%
Taxable Income Allocation, Post-Flip			8.53%
Financial Institutions [Member] | Pre-determined Date Through Flip Point If Flip Has Not Occured [Member] | November 2015 Drop Down Assets [Member]
Schedule of Equity Method Investments [Line Items]
Percentage of Cash Available for Distributions			100.00%
[1]	(d) Total net capacity excludes 55 MW for RPV Holdco and 45 MW for DGPV Holdco 1 and DGPV Holdco 2, which are consolidated by NRG, as further described in Note 4, Variable Interest Entities, or VIEs.
[2]	a) Net capacity represents the maximum, or rated, generating capacity of the facility multiplied by the Company's percentage ownership in the facility as of June 30, 2016.

Fair Value of Financial Instr44

Fair Value of Financial Instruments Fair Value of Financial Instruments - Balance Sheet Grouping (Details) - USD ($) $ in Millions	Jun. 30, 2016	Dec. 31, 2015
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt — affiliate	$ 618	$ 618
Reported Value Measurement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financing Receivable, Net	13	17
Long-term debt — affiliate	618	618
Long-term Debt and Capital Lease Obligations, Including Current Maturities	4,171	4,267
Estimate of Fair Value Measurement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financing Receivable, Net	13	17
Long-term debt — affiliate	590	553
Long-term Debt and Capital Lease Obligations, Including Current Maturities	$ 4,169	$ 4,181

Fair Value of Financial Instr45

Fair Value of Financial Instruments Fair Value of Financial Instruments - Recurring Fair Value (Details) - USD ($)		Jun. 30, 2016	Dec. 31, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset, Fair Value, Gross Asset		$ 1,000,000
Derivative Liability, Fair Value, Gross Liability		159,000,000	$ 100,000,000
Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset, Fair Value, Gross Asset	[1]	1,000,000	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Assets (Liabilities), at Fair Value, Net		0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Liability, Fair Value, Gross Liability	[1]	159,000,000	100,000,000
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Assets (Liabilities), at Fair Value, Net		0	0
Interest Rate Contract [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Liability, Fair Value, Gross Liability	[1]	159,000,000	98,000,000
Commodity Contract [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset, Fair Value, Gross Asset	[1]	1,000,000	0
Derivative Liability, Fair Value, Gross Liability	[1]	$ 0	$ 2,000,000
[1]	(a) There were no assets or liabilities classified as Level 1 or Level 3 as of June 30, 2016, and December 31, 2015.

Fair Value of Financial Instr46

Fair Value of Financial Instruments Fair Value of Financial Instruments - Credit Risk and Derivative FV Measurements (Details) $ in Millions	6 Months Ended
	Jun. 30, 2016USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value Assets, Measured on Recurring Basis, Valuation Techniques, Impact of Credit Reserve to Fair Value	$ 5
Concentration Risk, Credit Risk, Financial Instrument, Maximum Exposure	$ 2,500
Estimated Counterparty Credit Risk Exposure to Certain Counterparties, Period	5 years
Gain (Loss) on Derivative Instruments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value Assets, Measured on Recurring Basis, Valuation Techniques, Impact of Credit Reserve to Fair Value	$ 4
Interest Expense [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value Assets, Measured on Recurring Basis, Valuation Techniques, Impact of Credit Reserve to Fair Value	$ 1

Accounting for Derivative Ins47

Accounting for Derivative Instruments and Hedging Activities Accounting for Derivative Instruments and Hedging Activities - FV of Derivatives (Details) - USD ($) $ in Millions	Jun. 30, 2016	Dec. 31, 2015
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset	$ 1
Derivative Liability, Fair Value, Gross Liability	159	$ 100
Derivative, Collateral, Right to Reclaim Cash	0	0
Derivative, Collateral, Obligation to Return Cash	0	0
Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset	0
Derivative Liability, Fair Value, Gross Liability	142	90
Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset	1
Derivative Liability, Fair Value, Gross Liability	17	10
Interest Rate Contract Current [Member] | Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset	0
Derivative Liability, Fair Value, Gross Liability	34	34
Interest Rate Contract Current [Member] | Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset	0
Derivative Liability, Fair Value, Gross Liability	3	3
Interest Rate Contract Non Current [Member] | Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset	0
Derivative Liability, Fair Value, Gross Liability	108	56
Interest Rate Contract Non Current [Member] | Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset	0
Derivative Liability, Fair Value, Gross Liability	14	5
Commodity Contract Current [Member] | Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset	1
Derivative Liability, Fair Value, Gross Liability	0	2
United States of America, Dollars | Interest [Member]
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	1,932	1,991
MMbtu [Member] | Natural Gas [Member]
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	$ 4	$ 4

Accounting for Derivative Ins48

Accounting for Derivative Instruments and Hedging Activities Accounting for Derivative Instruments and Hedging Activities - AOCI (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2015	Dec. 31, 2014
Derivative [Line Items]
Accumulated Other Comprehensive Loss	$ (154)	$ (68)	$ (154)	$ (68)	$ (135)	$ (85)	$ (95)	$ (67)
Mark-to-market of cash flow hedge accounting contracts	(22)	23	(76)	(8)
Losses expected to be realized from OCL during the next 12 months			22
Gain (Loss) on Cash Flow Hedge Ineffectiveness, Net			0	0
Reclassification out of Accumulated Other Comprehensive Income [Member]
Derivative [Line Items]
Reclassified from accumulated OCL to income due to realization of previously deferred amounts	3	4	7	7
Noncontrolling Interest [Member]
Derivative [Line Items]
Accumulated Other Comprehensive Loss	(12)	(3)	(12)	(3)
Successor [Member]
Derivative [Line Items]
Accumulated Other Comprehensive Loss	$ (142)	$ (65)	$ (142)	$ (65)

Accounting for Derivative Ins49

Accounting for Derivative Instruments and Hedging Activities Accounting for Derivative Instruments and Hedging Activities - Impact on Statement of Operations (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Interest Rate Contract [Member] | Interest Expense [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Unrealized Gain (Loss) on Derivatives	$ 2,000,000	$ 31,000,000	$ 9,000,000	$ 19,000,000
Commodity Contract [Member] | Sales [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Unrealized Gain (Loss) on Derivatives		$ 4,000,000	$ 0	$ 3,000,000

Long-term Debt Long-term Debt -

Long-term Debt Long-term Debt - Debt Table (Details) - USD ($) $ in Thousands		6 Months Ended
		Jun. 30, 2016	Dec. 31, 2015
Debt Instrument [Line Items]
Long-term debt — affiliate		$ 618,000	$ 618,000
Long-term Debt		4,789,000	4,885,000
Current portion of long-term debt — external		251,000	241,000
Deferred Finance Costs, Net		47,000	50,000
Long-term Debt, Excluding Current Maturities		4,491,000	4,594,000
5.375% Senior Notes due in 2024 [Member]
Debt Instrument [Line Items]
Senior Notes		$ 500,000	500,000
Debt Instrument, Interest Rate, Stated Percentage	[1]	5.375%
Intercompany Credit Agreement due 2019 [Member]
Debt Instrument [Line Items]
Long-term debt — affiliate		$ 337,000	337,000
Debt Instrument, Interest Rate, Stated Percentage	[1]	3.58%
Intercompany Credit Agreement due 2020 [Member]
Debt Instrument [Line Items]
Long-term debt — affiliate		$ 281,000	281,000
Debt Instrument, Interest Rate, Stated Percentage	[1]	3.325%
NRG Yield Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Long-term Debt	[2]	$ 318,000	306,000
Proceeds from Issuance of Debt		60,000
Repayments of Debt		$ 48,000
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Debt Instrument, Description of Variable Rate Basis	[2]	1 month LIBOR
Debt Instrument, Basis Spread on Variable Rate		2.75%
Alta Wind I, lease financing arrangement, due 2034 [Member]
Debt Instrument [Line Items]
Long-term Debt		$ 245,000	252,000
Debt Instrument, Interest Rate, Stated Percentage	[1]	7.015%
Alta Wind II, lease financing arrangement, due 2034 [Member]
Debt Instrument [Line Items]
Long-term Debt		$ 194,000	198,000
Debt Instrument, Interest Rate, Stated Percentage	[1]	5.696%
Alta Wind III, lease financing arrangement, due 2034 [Member]
Debt Instrument [Line Items]
Long-term Debt		$ 201,000	206,000
Debt Instrument, Interest Rate, Stated Percentage	[1]	6.067%
Alta Wind IV, lease financing arrangement, due 2034 [Member]
Debt Instrument [Line Items]
Long-term Debt		$ 130,000	133,000
Debt Instrument, Interest Rate, Stated Percentage	[1]	5.938%
Alta Wind V, lease financing arrangement, due 2035 [Member]
Debt Instrument [Line Items]
Long-term Debt		$ 208,000	213,000
Debt Instrument, Interest Rate, Stated Percentage	[1]	6.071%
Alta Realty Investments, due 2031 [Member]
Debt Instrument [Line Items]
Long-term Debt		$ 32,000	33,000
Debt Instrument, Interest Rate, Stated Percentage	[1]	7.00%
Alta Wind Asset Management, due 2031 [Member]
Debt Instrument [Line Items]
Long-term Debt		$ 18,000	19,000
Debt Instrument, Description of Variable Rate Basis		3 month LIBOR
Debt Instrument, Basis Spread on Variable Rate		2.375%
West Holdings Credit Agreement [Member]
Debt Instrument [Line Items]
Long-term Debt		$ 457,000	485,000
Debt Instrument, Description of Variable Rate Basis		3 month LIBOR
West Holdings Credit Agreement due 2023 Tranche A [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate		1.625%
Marsh Landing Term Loan Facility [Member]
Debt Instrument [Line Items]
Long-term Debt		$ 410,000	418,000
Walnut Creek Energy, LLC, due in 2023 [Member]
Debt Instrument [Line Items]
Long-term Debt		$ 341,000	351,000
Debt Instrument, Description of Variable Rate Basis		1 month LIBOR
Debt Instrument, Basis Spread on Variable Rate		1.625%
Tapestry Wind LLC due in 2021 [Member]
Debt Instrument [Line Items]
Long-term Debt		$ 176,000	181,000
Debt Instrument, Description of Variable Rate Basis		3-Month LIBOR
Debt Instrument, Basis Spread on Variable Rate		1.625%
Viento Funding II, Inc., due in 2023 [Member]
Debt Instrument [Line Items]
Long-term Debt		$ 183,000	189,000
Debt Instrument, Description of Variable Rate Basis		3-Month LIBOR
Debt Instrument, Basis Spread on Variable Rate		2.75%
NRG Energy Center Minneapolis LLC Senior Secured Notes [Member]
Debt Instrument [Line Items]
Long-term Debt		$ 100,000	108,000
Laredo Ridge Wind, LLC, due in 2026 [Member]
Debt Instrument [Line Items]
Long-term Debt		$ 102,000	104,000
Debt Instrument, Description of Variable Rate Basis		3-Month LIBOR
Debt Instrument, Basis Spread on Variable Rate		1.875%
South Trent Financing Agreement [Member]
Debt Instrument [Line Items]
Long-term Debt		$ 59,000	62,000
Debt Instrument, Description of Variable Rate Basis		3-Month LIBOR
Debt Instrument, Basis Spread on Variable Rate		1.625%
Avra Valley Financing Agreement [Member]
Debt Instrument [Line Items]
Long-term Debt		$ 58,000	60,000
Debt Instrument, Description of Variable Rate Basis		3-Month LIBOR
Debt Instrument, Basis Spread on Variable Rate		1.75%
High Desert Facility [Member]
Debt Instrument [Line Items]
Long-term Debt		$ 51,000	52,000
WCEP Holdings, LLC, due in 2023 [Member]
Debt Instrument [Line Items]
Long-term Debt		$ 46,000	46,000
Debt Instrument, Description of Variable Rate Basis		3-Month LIBOR
Debt Instrument, Basis Spread on Variable Rate		3.00%
Other Debt [Member]
Debt Instrument [Line Items]
Long-term Debt		$ 1,000	2,000
Letters of Credit Outstanding, Amount		0
Roadrunner Financing Agreement [Member]
Debt Instrument [Line Items]
Long-term Debt		$ 38,000	40,000
Debt Instrument, Description of Variable Rate Basis		3-Month LIBOR
Debt Instrument, Basis Spread on Variable Rate		1.625%
Kansas South Facility, due 2031 [Member]
Debt Instrument [Line Items]
Long-term Debt		$ 31,000	33,000
Debt Instrument, Description of Variable Rate Basis		6-Month LIBOR
Debt Instrument, Basis Spread on Variable Rate		2.00%
NRG Solar Blythe LLC Credit Agreement Due 2028 [Member]
Debt Instrument [Line Items]
Long-term Debt		$ 21,000	21,000
Debt Instrument, Description of Variable Rate Basis		3-Month LIBOR
Debt Instrument, Basis Spread on Variable Rate		1.625%
PFMG Financing Agreement [Member]
Debt Instrument [Line Items]
Long-term Debt		$ 29,000	29,000
Debt Instrument, Interest Rate, Stated Percentage	[1]	6.00%
Project [Domain]
Debt Instrument [Line Items]
Long-term Debt		$ 3,353,000	3,461,000
West Holdings Credit Agreement due 2023 Tranche B [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate		2.25%
Marsh Landing Tranche A due December 2017 [Member]
Debt Instrument [Line Items]
Debt Instrument, Description of Variable Rate Basis		1 month LIBOR
Debt Instrument, Basis Spread on Variable Rate		1.75%
Marsh Landing Tranche B due 2023 [Member]
Debt Instrument [Line Items]
Debt Instrument, Description of Variable Rate Basis		1 month LIBOR
Debt Instrument, Basis Spread on Variable Rate		1.875%
Alpine Financing Agreement, due 2022 [Member]
Debt Instrument [Line Items]
Long-term Debt		$ 151,000	154,000
Debt Instrument, Description of Variable Rate Basis		3-Month LIBOR
Debt Instrument, Basis Spread on Variable Rate		1.75%
NRG Energy Center Minneapolis LLC Senior Secured Notes, due 2017 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		5.95%
NRG Energy Center Minneapolis LLC Senior Secured Notes, due 2025 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		7.25%
Borrego Financing Agreement, due 2024 [Member]
Debt Instrument [Line Items]
Long-term Debt		$ 71,000	$ 72,000
Debt Instrument, Description of Variable Rate Basis		3-Month LIBOR
Debt Instrument, Basis Spread on Variable Rate		2.50%
Borrego Financing Agreement, due 2038 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		5.65%
High Desert Facility, due 2033 [Member]
Debt Instrument [Line Items]
Debt Instrument, Description of Variable Rate Basis		3-Month LIBOR
Debt Instrument, Basis Spread on Variable Rate		2.50%
TA - High Desert, due 2023 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		5.15%
Letter of Credit [Member] | NRG Yield Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Letters of Credit Outstanding, Amount	[2]	$ 67,000
Letter of Credit [Member] | Alta Wind I, lease financing arrangement, due 2034 [Member]
Debt Instrument [Line Items]
Letters of Credit Outstanding, Amount		16,000
Letter of Credit [Member] | Alta Wind II, lease financing arrangement, due 2034 [Member]
Debt Instrument [Line Items]
Letters of Credit Outstanding, Amount		23,000
Letter of Credit [Member] | Alta Wind III, lease financing arrangement, due 2034 [Member]
Debt Instrument [Line Items]
Letters of Credit Outstanding, Amount		24,000
Letter of Credit [Member] | Alta Wind IV, lease financing arrangement, due 2034 [Member]
Debt Instrument [Line Items]
Letters of Credit Outstanding, Amount		16,000
Letter of Credit [Member] | Alta Wind V, lease financing arrangement, due 2035 [Member]
Debt Instrument [Line Items]
Letters of Credit Outstanding, Amount		27,000
Letter of Credit [Member] | Alta Realty Investments, due 2031 [Member]
Debt Instrument [Line Items]
Letters of Credit Outstanding, Amount		0
Letter of Credit [Member] | Alta Wind Asset Management, due 2031 [Member]
Debt Instrument [Line Items]
Letters of Credit Outstanding, Amount		0
Letter of Credit [Member] | West Holdings Credit Agreement [Member]
Debt Instrument [Line Items]
Letters of Credit Outstanding, Amount		82,000
Letter of Credit [Member] | Marsh Landing Term Loan Facility [Member]
Debt Instrument [Line Items]
Letters of Credit Outstanding, Amount		45,000
Letter of Credit [Member] | Walnut Creek Energy, LLC, due in 2023 [Member]
Debt Instrument [Line Items]
Letters of Credit Outstanding, Amount		60,000
Letter of Credit [Member] | Tapestry Wind LLC due in 2021 [Member]
Debt Instrument [Line Items]
Letters of Credit Outstanding, Amount		20,000
Letter of Credit [Member] | Viento Funding II, Inc., due in 2023 [Member]
Debt Instrument [Line Items]
Letters of Credit Outstanding, Amount		27,000
Letter of Credit [Member] | NRG Energy Center Minneapolis LLC Senior Secured Notes [Member]
Debt Instrument [Line Items]
Letters of Credit Outstanding, Amount		0
Letter of Credit [Member] | Laredo Ridge Wind, LLC, due in 2026 [Member]
Debt Instrument [Line Items]
Letters of Credit Outstanding, Amount		10,000
Letter of Credit [Member] | South Trent Financing Agreement [Member]
Debt Instrument [Line Items]
Letters of Credit Outstanding, Amount		10,000
Letter of Credit [Member] | Avra Valley Financing Agreement [Member]
Debt Instrument [Line Items]
Letters of Credit Outstanding, Amount		3,000
Letter of Credit [Member] | High Desert Facility [Member]
Debt Instrument [Line Items]
Letters of Credit Outstanding, Amount		8,000
Letter of Credit [Member] | WCEP Holdings LLC [Member]
Debt Instrument [Line Items]
Letters of Credit Outstanding, Amount		0
Letter of Credit [Member] | Roadrunner Financing Agreement [Member]
Debt Instrument [Line Items]
Letters of Credit Outstanding, Amount		5,000
Letter of Credit [Member] | Kansas South Facility, due 2031 [Member]
Debt Instrument [Line Items]
Letters of Credit Outstanding, Amount		4,000
Letter of Credit [Member] | NRG Solar Blythe LLC Credit Agreement Due 2028 [Member]
Debt Instrument [Line Items]
Letters of Credit Outstanding, Amount		6,000
Letter of Credit [Member] | PFMG Financing Agreement [Member]
Debt Instrument [Line Items]
Letters of Credit Outstanding, Amount		0
Letter of Credit [Member] | Alpine Financing Agreement, due 2022 [Member]
Debt Instrument [Line Items]
Letters of Credit Outstanding, Amount		37,000
Letter of Credit [Member] | Borrego Financing Agreement, due 2024 [Member]
Debt Instrument [Line Items]
Letters of Credit Outstanding, Amount		$ 5,000
[1]	As of June 30, 2016, L+ equals 3 month LIBOR plus x%, except for the Marsh Landing term loan, Walnut Creek term loan, and NRG Yield LLC and NRG Yield Operating LLC Revolving Credit Facility, where L+ equals 1 month LIBOR plus x% and Kansas South, where L+ equals 6 month LIBOR plus x%.
[2]	(b) Applicable rate is determined by the Borrower Leverage Ratio, as defined in the credit agreement.

Long-term Debt Long-term Debt51

Long-term Debt Long-term Debt - Corporate Debt (Details) - USD ($) $ in Millions		Jul. 15, 2016	Jul. 31, 2016	Jun. 30, 2016
NRG Yield Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Proceeds from Issuance of Debt				$ 60
Repayments of Debt				48
Line of Credit Facility, Fair Value of Amount Outstanding				318
Letter of Credit [Member] | NRG Yield Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Letters of Credit Outstanding, Amount	[1]			$ 67
Subsequent Event [Member] | NRG Yield Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Repayments of Debt			$ 28
Line of Credit Facility, Fair Value of Amount Outstanding			$ 193
Subsequent Event [Member] | CVSR Financing Agreement [Member]
Debt Instrument [Line Items]
Proceeds from Issuance of Debt		$ 200
Debt Instrument, Interest Rate, Stated Percentage		4.68%
Proceeds from Debt, Net of Issuance Costs		$ 97.5
CVSR [Member] | Utility-Scale Solar [Member]
Debt Instrument [Line Items]
Equity Method Investment, Ownership Percentage				48.95%
[1]	(b) Applicable rate is determined by the Borrower Leverage Ratio, as defined in the credit agreement.

Segment Reporting (Details)

Segment Reporting (Details) - USD ($) $ in Millions		3 Months Ended			6 Months Ended
		Jun. 30, 2016	Jun. 30, 2015		Jun. 30, 2016	Jun. 30, 2015		Dec. 31, 2015
Segment Reporting
Operating revenues		$ 258	$ 235	[1],[2]	$ 478	$ 435	[1],[2]
Cost of operations		75	75	[2]	158	159	[2]
Depreciation and amortization		67	70	[1],[2]	133	137	[1],[2],[3]
General and administrative		3	3	[1],[2]	5	6	[1],[2]
Business Combination, Acquisition Related Costs		0	1	[1],[2]	0	1	[1],[2]
Operating income (loss)		113	86	[1],[2]	182	132	[1],[2]
Equity in earnings of unconsolidated affiliates		18	8	[1],[2]	20	10	[1],[2],[3]
Other income, net		1	0	[1]	1	1	[1],[2]
Gains (Losses) on Extinguishment of Debt		0	(7)	[1],[2]	0	(7)	[1],[2],[3]
Interest expense		(58)	(43)	[1],[2]	(124)	(115)	[1],[2]
Net Income		74	44	[1],[2]	79	21	[1],[2],[3]
Total Assets		7,437			7,437			$ 7,608
Conventional Generation [Member]
Segment Reporting
Operating revenues		85	85	[2]	164	161	[2]
Cost of operations		16	15	[2]	39	36	[2]
Depreciation and amortization		20	21	[2]	40	42	[2]
General and administrative		0	0	[2]	0	0	[2]
Business Combination, Acquisition Related Costs	[2]		0			0
Operating income (loss)		49	49	[2]	85	83	[2]
Equity in earnings of unconsolidated affiliates		4	4	[2]	7	7	[2]
Other income, net		0			0	1	[2]
Gains (Losses) on Extinguishment of Debt	[2]		(7)			(7)
Interest expense		(12)	(13)	[2]	(23)	(25)	[2]
Net Income		41	33	[2]	69	59	[2]
Total Assets		2,037			2,037
Corporate
Segment Reporting
Operating revenues		0	0	[2]	0	0	[2]
Cost of operations		0	0	[2]	0	0	[2]
Depreciation and amortization		0	0	[2]	0	0	[2]
General and administrative		3	3	[2]	5	6	[2]
Business Combination, Acquisition Related Costs	[2]		1			1
Operating income (loss)		(3)	(4)	[2]	(5)	(7)	[2]
Equity in earnings of unconsolidated affiliates		0	0	[2]		0	[2]
Other income, net		0			0	0	[2]
Gains (Losses) on Extinguishment of Debt	[2]		0			0
Interest expense		(15)	(11)	[2]	(32)	(23)	[2]
Net Income		(18)	(15)	[2]	(37)	(30)	[2]
Total Assets		16			16
Thermal [Member]
Segment Reporting
Operating revenues		39	42	[2]	83	89	[2]
Cost of operations		27	31	[2]	56	65	[2]
Depreciation and amortization		5	4	[2]	10	9	[2]
General and administrative		0	0	[2]	0	0	[2]
Business Combination, Acquisition Related Costs	[2]		0			0
Operating income (loss)		7	7	[2]	17	15	[2]
Equity in earnings of unconsolidated affiliates		0	0	[2]	0	0	[2]
Other income, net		0			0	0	[2]
Gains (Losses) on Extinguishment of Debt	[2]		0			0
Interest expense		(1)	(2)	[2]	(3)	(4)	[2]
Net Income		6	5	[2]	14	11	[2]
Total Assets		423			423
Renewables
Segment Reporting
Operating revenues		134	108	[2]	231	185	[2]
Cost of operations		32	29	[2]	63	58	[2]
Depreciation and amortization		42	45	[2]	83	86	[2]
General and administrative		0	0	[2]	0	0	[2]
Business Combination, Acquisition Related Costs	[2]		0			0
Operating income (loss)		60	34	[2]	85	41	[2]
Equity in earnings of unconsolidated affiliates		14	4	[2]	13	3	[2]
Other income, net		1			1	0	[2]
Gains (Losses) on Extinguishment of Debt	[2]		0			0
Interest expense		(30)	(17)	[2]	(66)	(63)	[2]
Net Income		45	$ 21	[2]	33	$ (19)	[2]
Total Assets		$ 4,961			$ 4,961
[1]	(a) Retrospectively adjusted as discussed in Note 1, Nature of Business.
[2]	(a) Retrospectively adjusted as discussed in Note 1, Nature of Business.
[3]	(a) Retrospectively adjusted as discussed in Note 1, Nature of Business.

Related Party Transactions (Det

Related Party Transactions (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended			6 Months Ended			12 Months Ended
	Jul. 31, 2016	Jun. 30, 2016	Jun. 30, 2015	[1],[2]	Jun. 30, 2016	Jun. 30, 2015		Dec. 31, 2015
Related Party Transaction
General and administrative		$ 3	$ 3		$ 5	$ 6	[1],[2]
Accounts payable — affiliate		32			32			$ 85
Due to Affiliate, Noncurrent		618			618			618
GenOn Energy Services LLC [Member]
Related Party Transaction
Due to Affiliate		6			6			6
NRG Repowering Holdings LLC [Member]
Related Party Transaction
Cost of Natural Gas Purchases					1	3
NRG Yield [Member] | NRG [Member]
Related Party Transaction
Management Services Fee, Increase								1
General and administrative					4	5
NRG Yield [Member] | NRG [Member] | Scenario, Plan [Member]
Related Party Transaction
Management Services Fee, Annual					7
NRG Yield, Inc. [Member] | NRG [Member]
Related Party Transaction
Due to Affiliate		4			4
November 2015 Drop Down Assets [Member] | NRG [Member]
Related Party Transaction
Related Party Transaction, Other Revenues from Transactions with Related Party						12
Elbow Creek [Member] | NRG [Member]
Related Party Transaction
Revenues					4
Thermal [Member] | NRG [Member]
Related Party Transaction
Due to Affiliate		27			27			29
Accounts payable — affiliate		7			7
Due to Affiliate, Noncurrent		20			20
Related Party Transaction, Expenses from Transactions with Related Party					15	15
NRG Energy Center Dover [Member] | NRG [Member]
Related Party Transaction
Revenues					2
NRG Energy Center Minneapolis LLC [Member] | NRG [Member]
Related Party Transaction
Related Party Transaction, Expenses from Transactions with Related Party					4	5
Marsh Landing [Member] | GenOn Energy Services LLC [Member]
Related Party Transaction
Related Party Transaction, Expenses from Transactions with Related Party					5	9
El Segundo [Member] | NRG El Segundo Operations, Inc. [Member]
Related Party Transaction
Due to Affiliate		$ 1			1			$ 1
Related Party Transaction, Expenses from Transactions with Related Party					2	2
Gen Conn Energy LLC [Member] | NRG [Member]
Related Party Transaction
Related Party Transaction, Expenses from Transactions with Related Party					3	2
CVSR [Member] | NRG Energy Services LLC [Member]
Related Party Transaction
Related Party Transaction, Expenses from Transactions with Related Party					2	3
Operations and Maintenance services [Member] | November 2015 Drop Down Assets [Member] | NRG [Member]
Related Party Transaction
Related Party Transaction, Expenses from Transactions with Related Party					3	2
Support services [Member] | November 2015 Drop Down Assets [Member] | NRG [Member]
Related Party Transaction
Related Party Transaction, Expenses from Transactions with Related Party					$ 1	$ 2
Subsequent Event [Member]
Related Party Transaction
Repayments of Related Party Debt	$ 4
[1]	(a) Retrospectively adjusted as discussed in Note 1, Nature of Business.
[2]	(a) Retrospectively adjusted as discussed in Note 1, Nature of Business.

Condensed Consolidating Finan54

Condensed Consolidating Financial Information CP Income Statement (Details) - USD ($) $ in Millions		3 Months Ended				6 Months Ended
		Jun. 30, 2016		Jun. 30, 2015		Jun. 30, 2016		Jun. 30, 2015
Condensed Income Statements, Captions [Line Items]
Total operating revenues		$ 258		$ 235	[1],[2]	$ 478		$ 435	[1],[2]
Operating Costs and Expenses [Abstract]
Cost of operations		75		75	[1]	158		159	[1]
Depreciation and amortization		67		70	[1],[2]	133		137	[1],[2],[3]
General and administrative		3		3	[1],[2]	5		6	[1],[2]
Total operating costs and expenses		145		149	[1]	296		303	[1]
Operating income (loss)		113		86	[1],[2]	182		132	[1],[2]
Costs and Expenses [Abstract]
Equity in earnings of consolidated affiliates		0		0		0		0
Equity in earnings of unconsolidated affiliates		18		8	[1],[2]	20		10	[1],[2],[3]
Other income, net		1		0	[1]	1		1	[1],[2]
Gains (Losses) on Extinguishment of Debt		0		(7)	[1],[2]	0		(7)	[1],[2],[3]
Interest expense		58		43	[1],[2]	124		115	[1],[2]
Total other income (expense), net		(39)		(42)	[1]	(103)		(111)	[1]
Net Income (Loss)		74		44	[1],[2]	79		21	[1],[2],[3]
Less: Net loss attributable to noncontrolling interests		(15)		(11)	[1]	(26)		(16)	[1]
Net Income Attributable to NRG Yield LLC		89		55	[1]	105		37	[1]
NRG Yield LLC [Member]
Condensed Income Statements, Captions [Line Items]
Total operating revenues		0		0	[4]	0		0	[4]
Operating Costs and Expenses [Abstract]
Cost of operations		0		0	[4]	0		0	[4]
Depreciation and amortization		0		0	[4]	0		0	[4]
General and administrative		0		0	[4]	0		0	[4]
Total operating costs and expenses		0		0	[4]	0		0	[4]
Operating income (loss)		0		0	[4]	0		0	[4]
Costs and Expenses [Abstract]
Equity in earnings of consolidated affiliates		89		55	[4]	105		37	[4]
Equity in earnings of unconsolidated affiliates		0		0	[4]	0		0	[4]
Other income, net		0				0		0	[4]
Gains (Losses) on Extinguishment of Debt	[4]			0				0
Interest expense		0		0	[4]	0		0	[4]
Total other income (expense), net		89		55	[4]	105		37	[4]
Net Income (Loss)		89		55	[4]	105		37	[4]
Less: Net loss attributable to noncontrolling interests		0		0	[4]	0		0	[4]
Net Income Attributable to NRG Yield LLC		89		55	[4]	105		37	[4]
Guarantor Subsidiaries [Member]
Condensed Income Statements, Captions [Line Items]
Total operating revenues		5		5		10		10
Operating Costs and Expenses [Abstract]
Cost of operations		4		3		7		7
Depreciation and amortization		1		1		2		2
General and administrative		0		0		0		0
Total operating costs and expenses		5		4		9		9
Operating income (loss)		0		1		1		1
Costs and Expenses [Abstract]
Equity in earnings of consolidated affiliates		24		6		17		(19)
Equity in earnings of unconsolidated affiliates		3		0		7		0
Other income, net		0				0		0
Gains (Losses) on Extinguishment of Debt				0				0
Interest expense		0		0		0		0
Total other income (expense), net		27		6		24		(19)
Net Income (Loss)		27		7		25		(18)
Less: Net loss attributable to noncontrolling interests		0		0		0		0
Net Income Attributable to NRG Yield LLC		27		7		25		(18)
Non-Guarantor Subsidiaries [Member]
Condensed Income Statements, Captions [Line Items]
Total operating revenues		253		231	[4]	468		417	[4]
Operating Costs and Expenses [Abstract]
Cost of operations		71		72	[4]	151		152	[4]
Depreciation and amortization		66		69	[4]	131		135	[4]
General and administrative		0		0	[4]	0		0	[4]
Total operating costs and expenses		137		141	[4]	282		287	[4]
Operating income (loss)		116		90	[4]	186		130	[4]
Costs and Expenses [Abstract]
Equity in earnings of consolidated affiliates		0		0	[4]	0		0	[4]
Equity in earnings of unconsolidated affiliates		0		(1)	[4]	(2)		0	[4]
Other income, net		1				1		1	[4]
Gains (Losses) on Extinguishment of Debt	[4]			(7)				(7)
Interest expense		43		31	[4]	93		91	[4]
Total other income (expense), net		(42)		(39)	[4]	(94)		(97)	[4]
Net Income (Loss)		74		51	[4]	92		33	[4]
Less: Net loss attributable to noncontrolling interests		0		(4)	[4]	0		(4)	[4]
Net Income Attributable to NRG Yield LLC		74		55	[4]	92		37	[4]
NRG Yield Operating LLC [Member]
Condensed Income Statements, Captions [Line Items]
Total operating revenues		0		(1)	[4]	0		8	[4]
Operating Costs and Expenses [Abstract]
Cost of operations		0		0	[4]	0		0	[4]
Depreciation and amortization		0		0	[4]	0		0	[4]
General and administrative		3		3	[4]	5		6	[4]
Total operating costs and expenses		3		4	[4]	5		7	[4]
Operating income (loss)		(3)		(5)	[4]	(5)		1	[4]
Costs and Expenses [Abstract]
Equity in earnings of consolidated affiliates		77		56	[4]	100		38	[4]
Equity in earnings of unconsolidated affiliates		15		9	[4]	15		10	[4]
Other income, net		0				0		0	[4]
Gains (Losses) on Extinguishment of Debt	[4]			0				0
Interest expense		15		12	[4]	31		24	[4]
Total other income (expense), net		77		53	[4]	84		24	[4]
Net Income (Loss)		74		48	[4]	79		25	[4]
Less: Net loss attributable to noncontrolling interests		(15)		(7)	[4]	(26)		(12)	[4]
Net Income Attributable to NRG Yield LLC		89		55	[4]	105		37	[4]
Consolidation, Eliminations [Member]
Condensed Income Statements, Captions [Line Items]
Total operating revenues		0	[5]	0	[4],[6]	0	[5]	0	[4],[6]
Operating Costs and Expenses [Abstract]
Cost of operations		0	[5]	0	[4],[6]	0	[5]	0	[4],[6]
Depreciation and amortization		0	[5]	0	[4],[6]	0	[5]	0	[4],[6]
General and administrative		0	[5]	0	[4],[6]	0	[5]	0	[4],[6]
Total operating costs and expenses		0	[5]	0	[4],[6]	0	[5]	0	[4],[6]
Operating income (loss)		0	[5]	0	[4],[6]	0	[5]	0	[4],[6]
Costs and Expenses [Abstract]
Equity in earnings of consolidated affiliates		(190)	[5]	(117)	[4],[6]	(222)	[5]	(56)	[4],[6]
Equity in earnings of unconsolidated affiliates		0	[5]	0	[4],[6]	0	[5]	0	[4],[6]
Other income, net		0	[5]			0	[5]	0	[4],[6]
Gains (Losses) on Extinguishment of Debt	[4],[6]			0				0
Interest expense		0	[5]	0	[4],[6]	0	[5]	0	[4],[6]
Total other income (expense), net		(190)	[5]	(117)	[4],[6]	(222)	[5]	(56)	[4],[6]
Net Income (Loss)		(190)	[5]	(117)	[4],[6]	(222)	[5]	(56)	[4],[6]
Less: Net loss attributable to noncontrolling interests		0	[5]	0	[4],[6]	0	[5]	0	[4],[6]
Net Income Attributable to NRG Yield LLC		$ (190)	[5]	$ (117)	[4],[6]	$ (222)	[5]	$ (56)	[4],[6]
[1]	(a) Retrospectively adjusted as discussed in Note 1, Nature of Business.
[2]	(a) Retrospectively adjusted as discussed in Note 1, Nature of Business.
[3]	(a) Retrospectively adjusted as discussed in Note 1, Nature of Business.
[4]	(a) Retrospectively adjusted as discussed in Note 1, Nature of Business.
[5]	All significant intercompany transactions have been eliminated in consolidation.
[6]	(b) All significant intercompany transactions have been eliminated in consolidation.

Condensed Consolidating Finan55

Condensed Consolidating Financial Information CP Comprehensive Income (Details) - USD ($) $ in Millions	3 Months Ended				6 Months Ended
	Jun. 30, 2016		Jun. 30, 2015		Jun. 30, 2016		Jun. 30, 2015
Condensed Statement of Income Captions [Line Items]
Net Income (Loss)	$ 74		$ 44	[1],[2]	$ 79		$ 21	[1],[2],[3]
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax	(19)		27	[4]	(69)		(1)	[4]
Other Comprehensive Income (Loss), Net of Tax	(19)		27	[4]	(69)		(1)	[4]
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	55		71	[4]	10		20	[4]
Less: Comprehensive loss attributable to noncontrolling interests	(23)		(10)	[4]	(35)		(16)	[4]
Comprehensive Income Attributable to NRG Yield LLC	78		81	[4]	45		36	[4]
NRG Yield LLC [Member]
Condensed Statement of Income Captions [Line Items]
Net Income (Loss)	89		55	[5]	105		37	[5]
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax	(11)		26	[6]	(60)		(1)	[6]
Other Comprehensive Income (Loss), Net of Tax	(11)		26	[6]	(60)		(1)	[6]
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	78		81	[6]	45		36	[6]
Less: Comprehensive loss attributable to noncontrolling interests	0		0	[6]	0		0	[6]
Comprehensive Income Attributable to NRG Yield LLC	78		81	[6]	45		36	[6]
Guarantor Subsidiaries [Member]
Condensed Statement of Income Captions [Line Items]
Net Income (Loss)	27		7		25		(18)
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax	1		1		0		0
Other Comprehensive Income (Loss), Net of Tax	1		1		0		0
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	28		8		25		(18)
Less: Comprehensive loss attributable to noncontrolling interests	0		0		0		0
Comprehensive Income Attributable to NRG Yield LLC	28		8		25		(18)
Non-Guarantor Subsidiaries [Member]
Condensed Statement of Income Captions [Line Items]
Net Income (Loss)	74		51	[5]	92		33	[5]
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax	(18)		26	[6]	(64)		(1)	[6]
Other Comprehensive Income (Loss), Net of Tax	(18)		26	[6]	(64)		(1)	[6]
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	56		77	[6]	28		32	[6]
Less: Comprehensive loss attributable to noncontrolling interests	0		(4)	[6]	0		(4)	[6]
Comprehensive Income Attributable to NRG Yield LLC	56		81	[6]	28		36	[6]
NRG Yield Operating LLC [Member]
Condensed Statement of Income Captions [Line Items]
Net Income (Loss)	74		48	[5]	79		25	[5]
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax	(19)		27	[6]	(69)		(1)	[6]
Other Comprehensive Income (Loss), Net of Tax	(19)		27	[6]	(69)		(1)	[6]
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	55		75	[6]	10		24	[6]
Less: Comprehensive loss attributable to noncontrolling interests	(23)		(6)	[6]	(35)		(12)
Comprehensive Income Attributable to NRG Yield LLC	78		81	[6]	45		36	[6]
Consolidation, Eliminations [Member]
Condensed Statement of Income Captions [Line Items]
Net Income (Loss)	(190)	[7]	(117)	[5],[8]	(222)	[7]	(56)	[5],[8]
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax	28	[7]	(53)	[6],[9]	124	[7]	2	[6],[9]
Other Comprehensive Income (Loss), Net of Tax	28	[7]	(53)	[6],[9]	124	[7]	2	[6],[9]
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	(162)	[7]	(170)	[6],[9]	(98)	[7]	(54)	[6],[9]
Less: Comprehensive loss attributable to noncontrolling interests	0	[7]	0	[6],[9]	0	[7]	0	[6],[9]
Comprehensive Income Attributable to NRG Yield LLC	$ (162)	[10]	$ (170)	[6],[9]	$ (98)	[7]	$ (54)	[6],[9]
[1]	(a) Retrospectively adjusted as discussed in Note 1, Nature of Business.
[2]	(a) Retrospectively adjusted as discussed in Note 1, Nature of Business.
[3]	(a) Retrospectively adjusted as discussed in Note 1, Nature of Business.
[4]	(a) Retrospectively adjusted as discussed in Note 1, Nature of Business.
[5]	(a) Retrospectively adjusted as discussed in Note 1, Nature of Business.
[6]	(a) Retrospectively adjusted as discussed in Note 1, Nature of Business.
[7]	All significant intercompany transactions have been eliminated in consolidation.
[8]	(b) All significant intercompany transactions have been eliminated in consolidation.
[9]	(b) All significant intercompany transactions have been eliminated in consolidation.
[10]	(a) All significant intercompany transactions have been eliminated in consolidation.

Condensed Consolidating Finan56

Condensed Consolidating Financial Information CP Balance Sheet (Details) - USD ($) $ in Millions		Jun. 30, 2016		Dec. 31, 2015		Jun. 30, 2015		Dec. 31, 2014
Condensed Balance Sheet Statements, Captions [Line Items]
Cash and cash equivalents		$ 89		$ 110		$ 307	[1]	$ 429	[1]
Restricted cash		55		48
Accounts receivable — trade		109		95
Accounts receivable — affiliate		1		4
Inventory		35		35
Derivative Asset		1
Notes receivable		7		7
Prepayments and other current assets		22		22
Total current assets		319		321
Net property, plant and equipment		4,947		5,056
Investment in consolidated subsidiaries		0		0
Equity investments in affiliates		778		798
Notes receivable		6		10
Intangible assets, net		1,321		1,362
Other non-current assets		66		61
Total other assets		2,171		2,231
Total Assets		7,437		7,608
Current portion of long-term debt — external		251		241
Accounts payable — trade		21		23
Accounts payable — affiliate		32		85
Derivative instruments		37		39
Accrued expenses and other current liabilities		39		67
Current Liabilities		380		455
Other Liabilities
Long-term debt — external		3,873		3,976
Long-term debt — affiliate		618		618
Due to Related Parties, Noncurrent		20		0
Derivative instruments		122		61
Other non-current liabilities		63		64
Total non-current liabilities		4,696		4,719
Total Liabilities		5,076		5,174
Contributed capital		1,965		1,963
Retained earnings		111		93
Noncontrolling interest		427		460
Accumulated other comprehensive loss		(142)		(82)
Stockholders' Equity Attributable to Noncontrolling Interest		427		460
Total Members' Equity		2,361		2,434
Total Liabilities and Members’ Equity		7,437		7,608
NRG Yield LLC [Member]
Condensed Balance Sheet Statements, Captions [Line Items]
Cash and cash equivalents		14		15		220		328
Restricted cash		0		0
Accounts receivable — trade		0		0
Accounts receivable — affiliate		0		55
Inventory		0		0
Derivative Asset		0
Notes receivable		0		0
Prepayments and other current assets		0		0
Total current assets		14		70
Net property, plant and equipment		0		0
Investment in consolidated subsidiaries		1,920		1,904
Equity investments in affiliates		0		0
Notes receivable		0		0
Intangible assets, net		0		0
Other non-current assets		0		0
Total other assets		1,920		1,904
Total Assets		1,934		1,974
Current portion of long-term debt — external		0		0
Accounts payable — trade		0		0
Accounts payable — affiliate		0		0
Derivative instruments		0		0
Accrued expenses and other current liabilities		0		0
Current Liabilities		0		0
Other Liabilities
Long-term debt — external		0		0
Long-term debt — affiliate		0		0
Due to Related Parties, Noncurrent		0
Derivative instruments		0		0
Other non-current liabilities		0		0
Total non-current liabilities		0		0
Total Liabilities		0		0
Contributed capital		1,965		1,963
Retained earnings		111		93
Accumulated other comprehensive loss		(142)		(82)
Stockholders' Equity Attributable to Noncontrolling Interest		0		0
Total Members' Equity		1,934		1,974
Total Liabilities and Members’ Equity		1,934		1,974
Guarantor Subsidiaries [Member]
Condensed Balance Sheet Statements, Captions [Line Items]
Cash and cash equivalents		0		0		0		0
Restricted cash		0		0
Accounts receivable — trade		3		1
Accounts receivable — affiliate		0		4
Inventory		3		2
Derivative Asset		0
Notes receivable		0		0
Prepayments and other current assets		0		1
Total current assets		6		8
Net property, plant and equipment		59		61
Investment in consolidated subsidiaries		561		548
Equity investments in affiliates		78		70
Notes receivable		0		0
Intangible assets, net		56		57
Other non-current assets		0		0
Total other assets		695		675
Total Assets		760		744
Current portion of long-term debt — external		0		0
Accounts payable — trade		1		1
Accounts payable — affiliate		6		8
Derivative instruments		0		1
Accrued expenses and other current liabilities		1		1
Current Liabilities		8		11
Other Liabilities
Long-term debt — external		0		0
Long-term debt — affiliate		0		0
Due to Related Parties, Noncurrent		0
Derivative instruments		0		0
Other non-current liabilities		0		0
Total non-current liabilities		0		0
Total Liabilities		8		11
Contributed capital		812		821
Retained earnings		(57)		(85)
Accumulated other comprehensive loss		(3)		(3)
Stockholders' Equity Attributable to Noncontrolling Interest		0		0
Total Members' Equity		752		733
Total Liabilities and Members’ Equity		760		744
Non-Guarantor Subsidiaries [Member]
Condensed Balance Sheet Statements, Captions [Line Items]
Cash and cash equivalents		75		95		87	[2]	101	[2]
Restricted cash		55		48
Accounts receivable — trade		106		94
Accounts receivable — affiliate		1		6
Inventory		32		33
Derivative Asset		1
Notes receivable		7		7
Prepayments and other current assets		22		21
Total current assets		299		304
Net property, plant and equipment		4,888		4,995
Investment in consolidated subsidiaries		0		0
Equity investments in affiliates		165		176
Notes receivable		6		10
Intangible assets, net		1,265		1,305
Other non-current assets		64		59
Total other assets		1,500		1,550
Total Assets		6,687		6,849
Current portion of long-term debt — external		251		244
Accounts payable — trade		16		19
Accounts payable — affiliate		18		45
Derivative instruments		37		38
Accrued expenses and other current liabilities		21		49
Current Liabilities		343		395
Other Liabilities
Long-term debt — external		3,061		3,176
Long-term debt — affiliate		0		0
Due to Related Parties, Noncurrent		20
Derivative instruments		122		61
Other non-current liabilities		63		64
Total non-current liabilities		3,266		3,301
Total Liabilities		3,609		3,696
Contributed capital		3,051		3,162
Retained earnings		93		(11)
Accumulated other comprehensive loss		(133)		(69)
Stockholders' Equity Attributable to Noncontrolling Interest		67		71
Total Members' Equity		3,078		3,153
Total Liabilities and Members’ Equity		6,687		6,849
NRG Yield Operating LLC [Member]
Condensed Balance Sheet Statements, Captions [Line Items]
Cash and cash equivalents		0		0		$ 0		$ 0
Restricted cash		0		0
Accounts receivable — trade		0		0
Accounts receivable — affiliate		0		10
Inventory		0		0
Derivative Asset		0
Notes receivable		0		3
Prepayments and other current assets		0		0
Total current assets		0		13
Net property, plant and equipment		0		0
Investment in consolidated subsidiaries		3,202		3,270
Equity investments in affiliates		535		552
Notes receivable		0		0
Intangible assets, net		0		0
Other non-current assets		2		2
Total other assets		3,739		3,824
Total Assets		3,739		3,837
Current portion of long-term debt — external		0		0
Accounts payable — trade		4		3
Accounts payable — affiliate		8		104
Derivative instruments		0		0
Accrued expenses and other current liabilities		17		17
Current Liabilities		29		124
Other Liabilities
Long-term debt — external		812		800
Long-term debt — affiliate		618		618
Due to Related Parties, Noncurrent		0
Derivative instruments		0		0
Other non-current liabilities		0		0
Total non-current liabilities		1,430		1,418
Total Liabilities		1,459		1,542
Contributed capital		1,945		1,895
Retained earnings		117		93
Accumulated other comprehensive loss		(142)		(82)
Stockholders' Equity Attributable to Noncontrolling Interest		360		389
Total Members' Equity		2,280		2,295
Total Liabilities and Members’ Equity		3,739		3,837
Consolidation, Eliminations [Member]
Condensed Balance Sheet Statements, Captions [Line Items]
Cash and cash equivalents		0	[3]	0	[4]
Restricted cash		0	[3]	0	[5]
Accounts receivable — trade		0	[3]	0	[5]
Accounts receivable — affiliate		0	[3]	(71)	[5]
Inventory		0	[3]	0	[5]
Derivative Asset	[3]	0
Notes receivable	[3]	0		(3)
Prepayments and other current assets	[3]	0		0
Total current assets	[3]	0		(74)
Net property, plant and equipment		0	[3]	0	[5]
Investment in consolidated subsidiaries		(5,683)	[3]	(5,722)	[4]
Equity investments in affiliates		0	[3]	0	[4]
Notes receivable		0	[3]	0	[4]
Intangible assets, net		0	[3]	0	[4]
Other non-current assets		0	[3]	0	[5]
Total other assets		(5,683)	[3]	(5,722)	[5]
Total Assets		(5,683)	[3]	(5,796)	[5]
Current portion of long-term debt — external		0	[3]	(3)	[4]
Accounts payable — trade		0	[3]	0	[4]
Accounts payable — affiliate			[3]	(72)	[4]
Derivative instruments		0	[3]	0	[4]
Accrued expenses and other current liabilities		0	[3]	0	[4]
Current Liabilities		0	[3]	(75)	[4]
Other Liabilities
Long-term debt — external		0	[3]	0	[5]
Long-term debt — affiliate		0	[3]	0	[5]
Due to Related Parties, Noncurrent	[3]	0
Derivative instruments		0	[3]	0	[5]
Other non-current liabilities		0	[3]	0	[5]
Total non-current liabilities		0	[3]	0	[5]
Total Liabilities		0	[3]	(75)	[5]
Contributed capital		(5,808)	[3]	(5,878)	[5]
Retained earnings		(153)	[3]	3	[5]
Accumulated other comprehensive loss		278	[3]	154	[5]
Stockholders' Equity Attributable to Noncontrolling Interest		0	[3]	0	[5]
Total Members' Equity		(5,683)	[3]	(5,721)	[5]
Total Liabilities and Members’ Equity		$ (5,683)	[3]	$ (5,796)	[5]
[1]	(a) Retrospectively adjusted as discussed in Note 1, Nature of Business.
[2]	(a) Retrospectively adjusted as discussed in Note 1, Nature of Business.
[3]	All significant intercompany transactions have been eliminated in consolidation.
[4]	All significant intercompany transactions have been eliminated in consolidation.
[5]	All significant intercompany transactions have been eliminated in consolidation.

Condensed Consolidating Finan57

Condensed Consolidating Financial Information CP Cash Flows (Details) - USD ($) $ in Millions		6 Months Ended
		Jun. 30, 2016		Jun. 30, 2015		Dec. 31, 2015		Dec. 31, 2014
Condensed Cash Flow Statements, Captions [Line Items]
Proceeds from (Repayments of) Lines of Credit		$ 12		$ 267	[1]
Net Cash Provided by Operating Activities		199		93	[1]
Intercompany transactions between Yield LLC and subsidiaries		0		0
Acquisition of businesses, net of cash acquired				(37)
Capital expenditures		(11)		(8)	[1]
Increase (Decrease) in Restricted Cash		(7)		5	[1]
Decrease in notes receivable		4		3	[1]
Proceeds from Equity Method Investment, Dividends or Distributions, Return of Capital		29		15	[1]
Investments in unconsolidated affiliates		(59)		(328)	[1]
Other		2		0	[1]
Net Cash Provided by (Used in) Investing Activities		(42)		(839)	[1]
Transfer of funds under intercompany cash management arrangement		0		0
Net contributions from noncontrolling interests		8		123	[1]
Distributions to NRG for NRG Wind TE Holdco		(6)		0	[1]
Distributions to NRG for NRG Wind TE Holdco		0		600	[1]
Payment of distributions		(83)		(61)	[1]
Net payments of long-term debt		(109)		(582)	[1]
Net Cash (Used in) Provided by Financing Activities		(178)		624	[1]
Cash and Cash Equivalents, Period Increase (Decrease)		(21)		(122)	[1]
Cash and cash equivalents		89		307	[1]	$ 110		$ 429	[1]
NRG Yield LLC [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Proceeds from (Repayments of) Lines of Credit		0		0
Net Cash Provided by Operating Activities		0		(23)
Intercompany transactions between Yield LLC and subsidiaries		33		(517)
Acquisition of businesses, net of cash acquired				0
Capital expenditures		0		0
Increase (Decrease) in Restricted Cash		0		0
Decrease in notes receivable		0		0
Proceeds from Equity Method Investment, Dividends or Distributions, Return of Capital		0		0
Investments in unconsolidated affiliates		0		0
Other		0
Net Cash Provided by (Used in) Investing Activities		33		(517)
Transfer of funds under intercompany cash management arrangement		49		(107)
Net contributions from noncontrolling interests		0		0
Distributions to NRG for NRG Wind TE Holdco		0
Distributions to NRG for NRG Wind TE Holdco				600
Payment of distributions		(83)		(61)
Net payments of long-term debt		0
Net Cash (Used in) Provided by Financing Activities		(34)		432
Cash and Cash Equivalents, Period Increase (Decrease)		(1)		(108)
Cash and cash equivalents		14		220		15		328
Guarantor Subsidiaries [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Proceeds from (Repayments of) Lines of Credit		0		0
Net Cash Provided by Operating Activities		41		10
Intercompany transactions between Yield LLC and subsidiaries		0		0
Acquisition of businesses, net of cash acquired				0
Capital expenditures		0		0
Increase (Decrease) in Restricted Cash		0		0
Decrease in notes receivable		0		0
Proceeds from Equity Method Investment, Dividends or Distributions, Return of Capital		1		0
Investments in unconsolidated affiliates		(44)		4
Other		0
Net Cash Provided by (Used in) Investing Activities		(43)		(4)
Transfer of funds under intercompany cash management arrangement		2		(6)
Net contributions from noncontrolling interests		0		0
Distributions to NRG for NRG Wind TE Holdco		0
Distributions to NRG for NRG Wind TE Holdco				0
Payment of distributions		0		0
Net payments of long-term debt		0
Net Cash (Used in) Provided by Financing Activities		2		(6)
Cash and Cash Equivalents, Period Increase (Decrease)		0		0
Cash and cash equivalents		0		0		0		0
Non-Guarantor Subsidiaries [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Proceeds from (Repayments of) Lines of Credit		0		0	[2]
Net Cash Provided by Operating Activities		103		74	[2]
Intercompany transactions between Yield LLC and subsidiaries		0		0	[2]
Acquisition of businesses, net of cash acquired	[2]			0
Capital expenditures		(11)		(8)	[2]
Increase (Decrease) in Restricted Cash		(7)		5	[2]
Decrease in notes receivable		4		3	[2]
Proceeds from Equity Method Investment, Dividends or Distributions, Return of Capital		0		0	[2]
Investments in unconsolidated affiliates		0		0	[2]
Other		0
Net Cash Provided by (Used in) Investing Activities		(14)		0	[2]
Transfer of funds under intercompany cash management arrangement		0		0	[2]
Net contributions from noncontrolling interests		0		4	[2]
Distributions to NRG for NRG Wind TE Holdco		0
Distributions to NRG for NRG Wind TE Holdco	[2]			0
Payment of distributions		0		0	[2]
Net payments of long-term debt		(109)
Net Cash (Used in) Provided by Financing Activities		(109)		(88)	[2]
Cash and Cash Equivalents, Period Increase (Decrease)		(20)		(14)	[2]
Cash and cash equivalents		75		87	[2]	95		101	[2]
NRG Yield Operating LLC [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Proceeds from (Repayments of) Lines of Credit		12		267
Net Cash Provided by Operating Activities		55		32
Intercompany transactions between Yield LLC and subsidiaries		(33)		517
Acquisition of businesses, net of cash acquired				(37)
Capital expenditures		0		0
Increase (Decrease) in Restricted Cash		0		0
Decrease in notes receivable		0		0
Proceeds from Equity Method Investment, Dividends or Distributions, Return of Capital		28		15
Investments in unconsolidated affiliates		(15)		(324)
Other		2
Net Cash Provided by (Used in) Investing Activities		(18)		(318)
Transfer of funds under intercompany cash management arrangement		(51)		113
Net contributions from noncontrolling interests		8		119
Distributions to NRG for NRG Wind TE Holdco		(6)
Distributions to NRG for NRG Wind TE Holdco				0
Payment of distributions		0		0
Net payments of long-term debt
Net Cash (Used in) Provided by Financing Activities		(37)		286
Cash and Cash Equivalents, Period Increase (Decrease)		0		0
Cash and cash equivalents		0		0		0		$ 0
Drop-down Acquisition [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Acquisition of businesses, net of cash acquired				(489)
Drop-down Acquisition [Member] | NRG Yield LLC [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Acquisition of businesses, net of cash acquired				0
Drop-down Acquisition [Member] | Guarantor Subsidiaries [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Acquisition of businesses, net of cash acquired				0
Drop-down Acquisition [Member] | Non-Guarantor Subsidiaries [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Acquisition of businesses, net of cash acquired	[2]			0
Drop-down Acquisition [Member] | NRG Yield Operating LLC [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Acquisition of businesses, net of cash acquired				$ (489)
Consolidation, Eliminations [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Distributions to NRG for NRG Wind TE Holdco		(6)
Cash and cash equivalents		$ 0	[3]			$ 0	[4]
[1]	(a) Retrospectively adjusted as discussed in Note 1, Nature of Business.
[2]	(a) Retrospectively adjusted as discussed in Note 1, Nature of Business.
[3]	All significant intercompany transactions have been eliminated in consolidation.
[4]	All significant intercompany transactions have been eliminated in consolidation.

Condensed Consolidating Finan58

Condensed Consolidating Financial Information PP Income Statement (Details) - USD ($) $ in Millions		3 Months Ended				6 Months Ended
		Jun. 30, 2016		Jun. 30, 2015		Jun. 30, 2016		Jun. 30, 2015
Condensed Income Statements, Captions [Line Items]
Total operating revenues		$ 258		$ 235	[1],[2]	$ 478		$ 435	[1],[2]
Operating Costs and Expenses [Abstract]
Cost of operations		75		75	[1]	158		159	[1]
Depreciation and amortization		67		70	[1],[2]	133		137	[1],[2],[3]
General and administrative		3		3	[1],[2]	5		6	[1],[2]
Business Combination, Acquisition Related Costs		0		1	[1],[2]	0		1	[1],[2]
Total operating costs and expenses		145		149	[1]	296		303	[1]
Operating income (loss)		113		86	[1],[2]	182		132	[1],[2]
Equity in earnings of consolidated affiliates		0		0		0		0
Equity in earnings of unconsolidated affiliates		18		8	[1],[2]	20		10	[1],[2],[3]
Other income, net		1		0	[1]	1		1	[1],[2]
Gains (Losses) on Extinguishment of Debt		0		(7)	[1],[2]	0		(7)	[1],[2],[3]
Interest expense		58		43	[1],[2]	124		115	[1],[2]
Total other income (expense), net		(39)		(42)	[1]	(103)		(111)	[1]
Net Income (Loss)		74		44	[1],[2]	79		21	[1],[2],[3]
Less: Net loss attributable to noncontrolling interests		(15)		(11)	[1]	(26)		(16)	[1]
Net Income Attributable to NRG Yield LLC		89		55	[1]	105		37	[1]
NRG Yield LLC [Member]
Condensed Income Statements, Captions [Line Items]
Total operating revenues		0		0	[4]	0		0	[4]
Operating Costs and Expenses [Abstract]
Cost of operations		0		0	[4]	0		0	[4]
Depreciation and amortization		0		0	[4]	0		0	[4]
General and administrative		0		0	[4]	0		0	[4]
Business Combination, Acquisition Related Costs	[4]			0				0
Total operating costs and expenses		0		0	[4]	0		0	[4]
Operating income (loss)		0		0	[4]	0		0	[4]
Equity in earnings of consolidated affiliates		89		55	[4]	105		37	[4]
Equity in earnings of unconsolidated affiliates		0		0	[4]	0		0	[4]
Other income, net		0				0		0	[4]
Gains (Losses) on Extinguishment of Debt	[4]			0				0
Interest expense		0		0	[4]	0		0	[4]
Total other income (expense), net		89		55	[4]	105		37	[4]
Net Income (Loss)		89		55	[4]	105		37	[4]
Less: Net loss attributable to noncontrolling interests		0		0	[4]	0		0	[4]
Net Income Attributable to NRG Yield LLC		89		55	[4]	105		37	[4]
Guarantor Subsidiaries [Member]
Condensed Income Statements, Captions [Line Items]
Total operating revenues		5		5		10		10
Operating Costs and Expenses [Abstract]
Cost of operations		4		3		7		7
Depreciation and amortization		1		1		2		2
General and administrative		0		0		0		0
Business Combination, Acquisition Related Costs				0				0
Total operating costs and expenses		5		4		9		9
Operating income (loss)		0		1		1		1
Equity in earnings of consolidated affiliates		24		6		17		(19)
Equity in earnings of unconsolidated affiliates		3		0		7		0
Other income, net		0				0		0
Gains (Losses) on Extinguishment of Debt				0				0
Interest expense		0		0		0		0
Total other income (expense), net		27		6		24		(19)
Net Income (Loss)		27		7		25		(18)
Less: Net loss attributable to noncontrolling interests		0		0		0		0
Net Income Attributable to NRG Yield LLC		27		7		25		(18)
Non-Guarantor Subsidiaries [Member]
Condensed Income Statements, Captions [Line Items]
Total operating revenues		253		231	[4]	468		417	[4]
Operating Costs and Expenses [Abstract]
Cost of operations		71		72	[4]	151		152	[4]
Depreciation and amortization		66		69	[4]	131		135	[4]
General and administrative		0		0	[4]	0		0	[4]
Business Combination, Acquisition Related Costs	[4]			0				0
Total operating costs and expenses		137		141	[4]	282		287	[4]
Operating income (loss)		116		90	[4]	186		130	[4]
Equity in earnings of consolidated affiliates		0		0	[4]	0		0	[4]
Equity in earnings of unconsolidated affiliates		0		(1)	[4]	(2)		0	[4]
Other income, net		1				1		1	[4]
Gains (Losses) on Extinguishment of Debt	[4]			(7)				(7)
Interest expense		43		31	[4]	93		91	[4]
Total other income (expense), net		(42)		(39)	[4]	(94)		(97)	[4]
Net Income (Loss)		74		51	[4]	92		33	[4]
Less: Net loss attributable to noncontrolling interests		0		(4)	[4]	0		(4)	[4]
Net Income Attributable to NRG Yield LLC		74		55	[4]	92		37	[4]
NRG Yield Operating LLC [Member]
Condensed Income Statements, Captions [Line Items]
Total operating revenues		0		(1)	[4]	0		8	[4]
Operating Costs and Expenses [Abstract]
Cost of operations		0		0	[4]	0		0	[4]
Depreciation and amortization		0		0	[4]	0		0	[4]
General and administrative		3		3	[4]	5		6	[4]
Business Combination, Acquisition Related Costs				1	[4]			1
Total operating costs and expenses		3		4	[4]	5		7	[4]
Operating income (loss)		(3)		(5)	[4]	(5)		1	[4]
Equity in earnings of consolidated affiliates		77		56	[4]	100		38	[4]
Equity in earnings of unconsolidated affiliates		15		9	[4]	15		10	[4]
Other income, net		0				0		0	[4]
Gains (Losses) on Extinguishment of Debt	[4]			0				0
Interest expense		15		12	[4]	31		24	[4]
Total other income (expense), net		77		53	[4]	84		24	[4]
Net Income (Loss)		74		48	[4]	79		25	[4]
Less: Net loss attributable to noncontrolling interests		(15)		(7)	[4]	(26)		(12)	[4]
Net Income Attributable to NRG Yield LLC		89		55	[4]	105		37	[4]
Consolidation, Eliminations [Member]
Condensed Income Statements, Captions [Line Items]
Total operating revenues		0	[5]	0	[4],[6]	0	[5]	0	[4],[6]
Operating Costs and Expenses [Abstract]
Cost of operations		0	[5]	0	[4],[6]	0	[5]	0	[4],[6]
Depreciation and amortization		0	[5]	0	[4],[6]	0	[5]	0	[4],[6]
General and administrative		0	[5]	0	[4],[6]	0	[5]	0	[4],[6]
Business Combination, Acquisition Related Costs	[4],[6]			0				0
Total operating costs and expenses		0	[5]	0	[4],[6]	0	[5]	0	[4],[6]
Operating income (loss)		0	[5]	0	[4],[6]	0	[5]	0	[4],[6]
Equity in earnings of consolidated affiliates		(190)	[5]	(117)	[4],[6]	(222)	[5]	(56)	[4],[6]
Equity in earnings of unconsolidated affiliates		0	[5]	0	[4],[6]	0	[5]	0	[4],[6]
Other income, net		0	[5]			0	[5]	0	[4],[6]
Gains (Losses) on Extinguishment of Debt	[4],[6]			0				0
Interest expense		0	[5]	0	[4],[6]	0	[5]	0	[4],[6]
Total other income (expense), net		(190)	[5]	(117)	[4],[6]	(222)	[5]	(56)	[4],[6]
Net Income (Loss)		(190)	[5]	(117)	[4],[6]	(222)	[5]	(56)	[4],[6]
Less: Net loss attributable to noncontrolling interests		0	[5]	0	[4],[6]	0	[5]	0	[4],[6]
Net Income Attributable to NRG Yield LLC		$ (190)	[5]	$ (117)	[4],[6]	$ (222)	[5]	$ (56)	[4],[6]
[1]	(a) Retrospectively adjusted as discussed in Note 1, Nature of Business.
[2]	(a) Retrospectively adjusted as discussed in Note 1, Nature of Business.
[3]	(a) Retrospectively adjusted as discussed in Note 1, Nature of Business.
[4]	(a) Retrospectively adjusted as discussed in Note 1, Nature of Business.
[5]	All significant intercompany transactions have been eliminated in consolidation.
[6]	(b) All significant intercompany transactions have been eliminated in consolidation.

Condensed Consolidating Finan59

Condensed Consolidating Financial Information PP Comprehensive Income (Details) - USD ($) $ in Millions	3 Months Ended				6 Months Ended
	Jun. 30, 2016		Jun. 30, 2015		Jun. 30, 2016		Jun. 30, 2015
Condensed Statement of Income Captions [Line Items]
Net Income (Loss)	$ 74		$ 44	[1],[2]	$ 79		$ 21	[1],[2],[3]
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax	(19)		27	[4]	(69)		(1)	[4]
Other Comprehensive Income (Loss), Net of Tax	(19)		27	[4]	(69)		(1)	[4]
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	55		71	[4]	10		20	[4]
Less: Comprehensive loss attributable to noncontrolling interests	(23)		(10)	[4]	(35)		(16)	[4]
Comprehensive Income Attributable to NRG Yield LLC	78		81	[4]	45		36	[4]
NRG Yield LLC [Member]
Condensed Statement of Income Captions [Line Items]
Net Income (Loss)	89		55	[5]	105		37	[5]
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax	(11)		26	[6]	(60)		(1)	[6]
Other Comprehensive Income (Loss), Net of Tax	(11)		26	[6]	(60)		(1)	[6]
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	78		81	[6]	45		36	[6]
Less: Comprehensive loss attributable to noncontrolling interests	0		0	[6]	0		0	[6]
Comprehensive Income Attributable to NRG Yield LLC	78		81	[6]	45		36	[6]
Guarantor Subsidiaries [Member]
Condensed Statement of Income Captions [Line Items]
Net Income (Loss)	27		7		25		(18)
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax	1		1		0		0
Other Comprehensive Income (Loss), Net of Tax	1		1		0		0
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	28		8		25		(18)
Less: Comprehensive loss attributable to noncontrolling interests	0		0		0		0
Comprehensive Income Attributable to NRG Yield LLC	28		8		25		(18)
Non-Guarantor Subsidiaries [Member]
Condensed Statement of Income Captions [Line Items]
Net Income (Loss)	74		51	[5]	92		33	[5]
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax	(18)		26	[6]	(64)		(1)	[6]
Other Comprehensive Income (Loss), Net of Tax	(18)		26	[6]	(64)		(1)	[6]
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	56		77	[6]	28		32	[6]
Less: Comprehensive loss attributable to noncontrolling interests	0		(4)	[6]	0		(4)	[6]
Comprehensive Income Attributable to NRG Yield LLC	56		81	[6]	28		36	[6]
NRG Yield Operating LLC [Member]
Condensed Statement of Income Captions [Line Items]
Net Income (Loss)	74		48	[5]	79		25	[5]
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax	(19)		27	[6]	(69)		(1)	[6]
Other Comprehensive Income (Loss), Net of Tax	(19)		27	[6]	(69)		(1)	[6]
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	55		75	[6]	10		24	[6]
Less: Comprehensive loss attributable to noncontrolling interests	(23)		(6)	[6]	(35)		(12)
Comprehensive Income Attributable to NRG Yield LLC	78		81	[6]	45		36	[6]
Consolidation, Eliminations [Member]
Condensed Statement of Income Captions [Line Items]
Net Income (Loss)	(190)	[7]	(117)	[5],[8]	(222)	[7]	(56)	[5],[8]
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax	28	[7]	(53)	[6],[9]	124	[7]	2	[6],[9]
Other Comprehensive Income (Loss), Net of Tax	28	[7]	(53)	[6],[9]	124	[7]	2	[6],[9]
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	(162)	[7]	(170)	[6],[9]	(98)	[7]	(54)	[6],[9]
Less: Comprehensive loss attributable to noncontrolling interests	0	[7]	0	[6],[9]	0	[7]	0	[6],[9]
Comprehensive Income Attributable to NRG Yield LLC	$ (162)	[10]	$ (170)	[6],[9]	$ (98)	[7]	$ (54)	[6],[9]
[1]	(a) Retrospectively adjusted as discussed in Note 1, Nature of Business.
[2]	(a) Retrospectively adjusted as discussed in Note 1, Nature of Business.
[3]	(a) Retrospectively adjusted as discussed in Note 1, Nature of Business.
[4]	(a) Retrospectively adjusted as discussed in Note 1, Nature of Business.
[5]	(a) Retrospectively adjusted as discussed in Note 1, Nature of Business.
[6]	(a) Retrospectively adjusted as discussed in Note 1, Nature of Business.
[7]	All significant intercompany transactions have been eliminated in consolidation.
[8]	(b) All significant intercompany transactions have been eliminated in consolidation.
[9]	(b) All significant intercompany transactions have been eliminated in consolidation.
[10]	(a) All significant intercompany transactions have been eliminated in consolidation.

Condensed Consolidating Finan60

Condensed Consolidating Financial Information PP Balance Sheet (Details) - USD ($) $ in Millions		Jun. 30, 2016		Dec. 31, 2015		Jun. 30, 2015		Dec. 31, 2014
Condensed Balance Sheet Statements, Captions [Line Items]
Cash and cash equivalents		$ 89		$ 110		$ 307	[1]	$ 429	[1]
Restricted cash		55		48
Accounts receivable — trade		109		95
Accounts receivable — affiliate		1		4
Inventory		35		35
Notes receivable		7		7
Prepayments and other current assets		22		22
Total current assets		319		321
Net property, plant and equipment		4,947		5,056
Investment in consolidated subsidiaries		0		0
Equity investments in affiliates		778		798
Notes receivable		6		10
Intangible assets, net		1,321		1,362
Other non-current assets		66		61
Total other assets		2,171		2,231
Total Assets		7,437		7,608
Current portion of long-term debt — external		251		241
Accounts payable — trade		21		23
Accounts payable — affiliate		32		85
Derivative instruments		37		39
Accrued expenses and other current liabilities		39		67
Current Liabilities		380		455
Other Liabilities
Long-term debt — external		3,873		3,976
Long-term debt — affiliate		618		618
Derivative instruments		122		61
Other non-current liabilities		63		64
Total non-current liabilities		4,696		4,719
Total Liabilities		5,076		5,174
Contributed capital		1,965		1,963
Retained earnings		111		93
Accumulated other comprehensive loss		(142)		(82)
Noncontrolling interest		427		460
Total Members' Equity		2,361		2,434
Total Liabilities and Members’ Equity		7,437		7,608
NRG Yield LLC [Member]
Condensed Balance Sheet Statements, Captions [Line Items]
Cash and cash equivalents		14		15		220		328
Restricted cash		0		0
Accounts receivable — trade		0		0
Accounts receivable — affiliate		0		55
Inventory		0		0
Notes receivable		0		0
Prepayments and other current assets		0		0
Total current assets		14		70
Net property, plant and equipment		0		0
Investment in consolidated subsidiaries		1,920		1,904
Equity investments in affiliates		0		0
Notes receivable		0		0
Intangible assets, net		0		0
Other non-current assets		0		0
Total other assets		1,920		1,904
Total Assets		1,934		1,974
Current portion of long-term debt — external		0		0
Accounts payable — trade		0		0
Accounts payable — affiliate		0		0
Derivative instruments		0		0
Accrued expenses and other current liabilities		0		0
Current Liabilities		0		0
Other Liabilities
Long-term debt — external		0		0
Long-term debt — affiliate		0		0
Derivative instruments		0		0
Other non-current liabilities		0		0
Total non-current liabilities		0		0
Total Liabilities		0		0
Contributed capital		1,965		1,963
Retained earnings		111		93
Accumulated other comprehensive loss		(142)		(82)
Noncontrolling interest		0		0
Total Members' Equity		1,934		1,974
Total Liabilities and Members’ Equity		1,934		1,974
Guarantor Subsidiaries [Member]
Condensed Balance Sheet Statements, Captions [Line Items]
Cash and cash equivalents		0		0		0		0
Restricted cash		0		0
Accounts receivable — trade		3		1
Accounts receivable — affiliate		0		4
Inventory		3		2
Notes receivable		0		0
Prepayments and other current assets		0		1
Total current assets		6		8
Net property, plant and equipment		59		61
Investment in consolidated subsidiaries		561		548
Equity investments in affiliates		78		70
Notes receivable		0		0
Intangible assets, net		56		57
Other non-current assets		0		0
Total other assets		695		675
Total Assets		760		744
Current portion of long-term debt — external		0		0
Accounts payable — trade		1		1
Accounts payable — affiliate		6		8
Derivative instruments		0		1
Accrued expenses and other current liabilities		1		1
Current Liabilities		8		11
Other Liabilities
Long-term debt — external		0		0
Long-term debt — affiliate		0		0
Derivative instruments		0		0
Other non-current liabilities		0		0
Total non-current liabilities		0		0
Total Liabilities		8		11
Contributed capital		812		821
Retained earnings		(57)		(85)
Accumulated other comprehensive loss		(3)		(3)
Noncontrolling interest		0		0
Total Members' Equity		752		733
Total Liabilities and Members’ Equity		760		744
Non-Guarantor Subsidiaries [Member]
Condensed Balance Sheet Statements, Captions [Line Items]
Cash and cash equivalents		75		95		87	[2]	101	[2]
Restricted cash		55		48
Accounts receivable — trade		106		94
Accounts receivable — affiliate		1		6
Inventory		32		33
Notes receivable		7		7
Prepayments and other current assets		22		21
Total current assets		299		304
Net property, plant and equipment		4,888		4,995
Investment in consolidated subsidiaries		0		0
Equity investments in affiliates		165		176
Notes receivable		6		10
Intangible assets, net		1,265		1,305
Other non-current assets		64		59
Total other assets		1,500		1,550
Total Assets		6,687		6,849
Current portion of long-term debt — external		251		244
Accounts payable — trade		16		19
Accounts payable — affiliate		18		45
Derivative instruments		37		38
Accrued expenses and other current liabilities		21		49
Current Liabilities		343		395
Other Liabilities
Long-term debt — external		3,061		3,176
Long-term debt — affiliate		0		0
Derivative instruments		122		61
Other non-current liabilities		63		64
Total non-current liabilities		3,266		3,301
Total Liabilities		3,609		3,696
Contributed capital		3,051		3,162
Retained earnings		93		(11)
Accumulated other comprehensive loss		(133)		(69)
Noncontrolling interest		67		71
Total Members' Equity		3,078		3,153
Total Liabilities and Members’ Equity		6,687		6,849
NRG Yield Operating LLC [Member]
Condensed Balance Sheet Statements, Captions [Line Items]
Cash and cash equivalents		0		0		$ 0		$ 0
Restricted cash		0		0
Accounts receivable — trade		0		0
Accounts receivable — affiliate		0		10
Inventory		0		0
Notes receivable		0		3
Prepayments and other current assets		0		0
Total current assets		0		13
Net property, plant and equipment		0		0
Investment in consolidated subsidiaries		3,202		3,270
Equity investments in affiliates		535		552
Notes receivable		0		0
Intangible assets, net		0		0
Other non-current assets		2		2
Total other assets		3,739		3,824
Total Assets		3,739		3,837
Current portion of long-term debt — external		0		0
Accounts payable — trade		4		3
Accounts payable — affiliate		8		104
Derivative instruments		0		0
Accrued expenses and other current liabilities		17		17
Current Liabilities		29		124
Other Liabilities
Long-term debt — external		812		800
Long-term debt — affiliate		618		618
Derivative instruments		0		0
Other non-current liabilities		0		0
Total non-current liabilities		1,430		1,418
Total Liabilities		1,459		1,542
Contributed capital		1,945		1,895
Retained earnings		117		93
Accumulated other comprehensive loss		(142)		(82)
Noncontrolling interest		360		389
Total Members' Equity		2,280		2,295
Total Liabilities and Members’ Equity		3,739		3,837
Consolidation, Eliminations [Member]
Condensed Balance Sheet Statements, Captions [Line Items]
Cash and cash equivalents		0	[3]	0	[4]
Restricted cash		0	[3]	0	[5]
Accounts receivable — trade		0	[3]	0	[5]
Accounts receivable — affiliate		0	[3]	(71)	[5]
Inventory		0	[3]	0	[5]
Notes receivable	[3]	0		(3)
Prepayments and other current assets	[3]	0		0
Total current assets	[3]	0		(74)
Net property, plant and equipment		0	[3]	0	[5]
Investment in consolidated subsidiaries		(5,683)	[3]	(5,722)	[4]
Equity investments in affiliates		0	[3]	0	[4]
Notes receivable		0	[3]	0	[4]
Intangible assets, net		0	[3]	0	[4]
Other non-current assets		0	[3]	0	[5]
Total other assets		(5,683)	[3]	(5,722)	[5]
Total Assets		(5,683)	[3]	(5,796)	[5]
Current portion of long-term debt — external		0	[3]	(3)	[4]
Accounts payable — trade		0	[3]	0	[4]
Accounts payable — affiliate			[3]	(72)	[4]
Derivative instruments		0	[3]	0	[4]
Accrued expenses and other current liabilities		0	[3]	0	[4]
Current Liabilities		0	[3]	(75)	[4]
Other Liabilities
Long-term debt — external		0	[3]	0	[5]
Long-term debt — affiliate		0	[3]	0	[5]
Derivative instruments		0	[3]	0	[5]
Other non-current liabilities		0	[3]	0	[5]
Total non-current liabilities		0	[3]	0	[5]
Total Liabilities		0	[3]	(75)	[5]
Contributed capital		(5,808)	[3]	(5,878)	[5]
Retained earnings		(153)	[3]	3	[5]
Accumulated other comprehensive loss		278	[3]	154	[5]
Noncontrolling interest		0	[3]	0	[5]
Total Members' Equity		(5,683)	[3]	(5,721)	[5]
Total Liabilities and Members’ Equity		$ (5,683)	[3]	$ (5,796)	[5]
[1]	(a) Retrospectively adjusted as discussed in Note 1, Nature of Business.
[2]	(a) Retrospectively adjusted as discussed in Note 1, Nature of Business.
[3]	All significant intercompany transactions have been eliminated in consolidation.
[4]	All significant intercompany transactions have been eliminated in consolidation.
[5]	All significant intercompany transactions have been eliminated in consolidation.

Condensed Consolidating Finan61

Condensed Consolidating Financial Information PP Cash Flows (Details) - USD ($) $ in Millions		6 Months Ended
		Jun. 30, 2016		Jun. 30, 2015		Dec. 31, 2015		Dec. 31, 2014
Condensed Cash Flow Statements, Captions [Line Items]
Net contributions from noncontrolling interests		$ 8		$ 123	[1]
Net Cash Provided by Operating Activities		199		93	[1]
Intercompany transactions between Yield LLC and subsidiaries		0		0
Acquisition of businesses, net of cash acquired				(37)
Capital expenditures		(11)		(8)	[1]
Increase (Decrease) in Restricted Cash		(7)		5	[1]
Decrease in notes receivable		4		3	[1]
Proceeds from Equity Method Investment, Dividends or Distributions, Return of Capital		29		15	[1]
Investments in unconsolidated affiliates		(59)		(328)	[1]
Other		2		0	[1]
Net Cash Provided by (Used in) Investing Activities		(42)		(839)	[1]
Proceeds from Contributions from Parent				0
Distributions to NRG for NRG Wind TE Holdco		(6)		0	[1]
Proceeds from the issuance of Class C and Class A units		0		600	[1]
Transfer of funds under intercompany cash management arrangement		0		0
Payment of distributions		(83)		(61)	[1]
Proceeds from issuance of long-term debt — external				(582)
Proceeds from (Repayments of) Lines of Credit		12		267	[1]
Net payments of long-term debt		(109)		(582)	[1]
Net Cash (Used in) Provided by Financing Activities		(178)		624	[1]
Cash and Cash Equivalents, Period Increase (Decrease)		(21)		(122)	[1]
Cash and cash equivalents		89		307	[1]	$ 110		$ 429	[1]
Proceeds from issuance of long-term debt — affiliate		0		281	[1]
Payments of Financing Costs				4
NRG Yield LLC [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net contributions from noncontrolling interests		0		0
Net Cash Provided by Operating Activities		0		(23)
Intercompany transactions between Yield LLC and subsidiaries		33		(517)
Acquisition of businesses, net of cash acquired				0
Capital expenditures		0		0
Increase (Decrease) in Restricted Cash		0		0
Decrease in notes receivable		0		0
Proceeds from Equity Method Investment, Dividends or Distributions, Return of Capital		0		0
Investments in unconsolidated affiliates		0		0
Other		0
Net Cash Provided by (Used in) Investing Activities		33		(517)
Proceeds from Contributions from Parent				0
Distributions to NRG for NRG Wind TE Holdco		0
Proceeds from the issuance of Class C and Class A units				600
Transfer of funds under intercompany cash management arrangement		49		(107)
Payment of distributions		(83)		(61)
Proceeds from issuance of long-term debt — external				0
Proceeds from (Repayments of) Lines of Credit		0		0
Net payments of long-term debt		0
Net Cash (Used in) Provided by Financing Activities		(34)		432
Cash and Cash Equivalents, Period Increase (Decrease)		(1)		(108)
Cash and cash equivalents		14		220		15		328
Proceeds from issuance of long-term debt — affiliate				0
Payments of Financing Costs				0
Guarantor Subsidiaries [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net contributions from noncontrolling interests		0		0
Net Cash Provided by Operating Activities		41		10
Intercompany transactions between Yield LLC and subsidiaries		0		0
Acquisition of businesses, net of cash acquired				0
Capital expenditures		0		0
Increase (Decrease) in Restricted Cash		0		0
Decrease in notes receivable		0		0
Proceeds from Equity Method Investment, Dividends or Distributions, Return of Capital		1		0
Investments in unconsolidated affiliates		(44)		4
Other		0
Net Cash Provided by (Used in) Investing Activities		(43)		(4)
Proceeds from Contributions from Parent				0
Distributions to NRG for NRG Wind TE Holdco		0
Proceeds from the issuance of Class C and Class A units				0
Transfer of funds under intercompany cash management arrangement		2		(6)
Payment of distributions		0		0
Proceeds from issuance of long-term debt — external				0
Proceeds from (Repayments of) Lines of Credit		0		0
Net payments of long-term debt		0
Net Cash (Used in) Provided by Financing Activities		2		(6)
Cash and Cash Equivalents, Period Increase (Decrease)		0		0
Cash and cash equivalents		0		0		0		0
Proceeds from issuance of long-term debt — affiliate				0
Payments of Financing Costs				0
Non-Guarantor Subsidiaries [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net contributions from noncontrolling interests		0		4	[2]
Net Cash Provided by Operating Activities		103		74	[2]
Intercompany transactions between Yield LLC and subsidiaries		0		0	[2]
Acquisition of businesses, net of cash acquired	[2]			0
Capital expenditures		(11)		(8)	[2]
Increase (Decrease) in Restricted Cash		(7)		5	[2]
Decrease in notes receivable		4		3	[2]
Proceeds from Equity Method Investment, Dividends or Distributions, Return of Capital		0		0	[2]
Investments in unconsolidated affiliates		0		0	[2]
Other		0
Net Cash Provided by (Used in) Investing Activities		(14)		0	[2]
Proceeds from Contributions from Parent	[2]			(494)
Distributions to NRG for NRG Wind TE Holdco		0
Proceeds from the issuance of Class C and Class A units	[2]			0
Transfer of funds under intercompany cash management arrangement		0		0	[2]
Payment of distributions		0		0	[2]
Proceeds from issuance of long-term debt — external	[2]			(582)
Proceeds from (Repayments of) Lines of Credit		0		0	[2]
Net payments of long-term debt		(109)
Net Cash (Used in) Provided by Financing Activities		(109)		(88)	[2]
Cash and Cash Equivalents, Period Increase (Decrease)		(20)		(14)	[2]
Cash and cash equivalents		75		87	[2]	95		101	[2]
Proceeds from issuance of long-term debt — affiliate	[2]			0
Payments of Financing Costs	[2]			4
NRG Yield Operating LLC [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net contributions from noncontrolling interests		8		119
Net Cash Provided by Operating Activities		55		32
Intercompany transactions between Yield LLC and subsidiaries		(33)		517
Acquisition of businesses, net of cash acquired				(37)
Capital expenditures		0		0
Increase (Decrease) in Restricted Cash		0		0
Decrease in notes receivable		0		0
Proceeds from Equity Method Investment, Dividends or Distributions, Return of Capital		28		15
Investments in unconsolidated affiliates		(15)		(324)
Other		2
Net Cash Provided by (Used in) Investing Activities		(18)		(318)
Proceeds from Contributions from Parent				(494)
Distributions to NRG for NRG Wind TE Holdco		(6)
Proceeds from the issuance of Class C and Class A units				0
Transfer of funds under intercompany cash management arrangement		(51)		113
Payment of distributions		0		0
Proceeds from issuance of long-term debt — external				0
Proceeds from (Repayments of) Lines of Credit		12		267
Net payments of long-term debt
Net Cash (Used in) Provided by Financing Activities		(37)		286
Cash and Cash Equivalents, Period Increase (Decrease)		0		0
Cash and cash equivalents		0		0		0		$ 0
Proceeds from issuance of long-term debt — affiliate				281
Payments of Financing Costs				0
Drop-down Acquisition [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Acquisition of businesses, net of cash acquired				(489)
Drop-down Acquisition [Member] | NRG Yield LLC [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Acquisition of businesses, net of cash acquired				0
Drop-down Acquisition [Member] | Guarantor Subsidiaries [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Acquisition of businesses, net of cash acquired				0
Drop-down Acquisition [Member] | Non-Guarantor Subsidiaries [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Acquisition of businesses, net of cash acquired	[2]			0
Drop-down Acquisition [Member] | NRG Yield Operating LLC [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Acquisition of businesses, net of cash acquired				$ (489)
Consolidation, Eliminations [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Distributions to NRG for NRG Wind TE Holdco		(6)
Cash and cash equivalents		$ 0	[3]			$ 0	[4]
[1]	(a) Retrospectively adjusted as discussed in Note 1, Nature of Business.
[2]	(a) Retrospectively adjusted as discussed in Note 1, Nature of Business.
[3]	All significant intercompany transactions have been eliminated in consolidation.
[4]	All significant intercompany transactions have been eliminated in consolidation.