XPLR Infrastructure (XIFR) 10-Q 23 Apr 19 2019 Q1 Quarterly report Financial data

Document and Entity Information

Document and Entity Information	3 Months Ended
	Mar. 31, 2019shares
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q1
Entity Registrant Name	NEXTERA ENERGY PARTNERS, LP
Entity Central Index Key	0001603145
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Emerging Growth Company	false
Entity Small Business	false
Entity Common Stock, Shares Outstanding	56,149,912

Condensed Consolidated Statemen

Condensed Consolidated Statements of Income (Loss) - USD ($) shares in Millions, $ in Millions		3 Months Ended
		Mar. 31, 2019	Mar. 31, 2018	[1]
OPERATING REVENUES
Renewable energy sales		$ 123	$ 156
Texas pipelines service revenues		54	56
Total operating revenues	[2]	177	212
OPERATING EXPENSES
Operations and maintenance	[3]	76	62
Depreciation and amortization		61	53	[4]
Taxes other than income taxes and other		6	5
Total operating expenses - net		143	120
OPERATING INCOME		34	92
OTHER INCOME (DEDUCTIONS)
Interest expense		(155)	(103)
Equity in earnings of equity method investee		0	3
Equity in earnings (losses) of non-economic ownership interests		(7)	6	[4]
Other - net		0	2
Total other deductions - net		(162)	(92)
LOSS BEFORE INCOME TAXES		(128)	0
INCOME TAX EXPENSE (BENEFIT)		(7)	19
NET LOSS		(121)	(19)	[4],[5]
Net income attributable to preferred distributions		(6)	(6)	[6]
Less net income (loss) attributable to noncontrolling interest		105	99
NET INCOME (LOSS) ATTRIBUTABLE TO NEXTERA ENERGY PARTNERS, LP		$ (22)	$ 74
Weighted average number of common units outstanding - basic (in shares)		56.1	54.3
Weighted average number of common units outstanding - assuming dilution (in shares)		75.8	74
Earnings (loss) per common unit attributable to NextEra Energy Partners, LP - basic (in dollars per share)		$ (0.38)	$ 1.36
Earnings (loss) per common unit attributable to NextEra Energy Partners, LP - assuming dilution (in dollars per share)		$ (0.38)	$ 1.22
[1]	Prior-period financial information has been retrospectively adjusted to include the adoption of an accounting standards update related to leases.
[2]	Includes related party revenues of $1 million and $2 million for the three months ended March 31, 2019 and 2018, respectively.
[3]	Includes O&M expenses related to renewable energy projects of $38 million and $29 million for the three months ended March 31, 2019 and 2018, respectively. Includes O&M expenses related to the Texas pipelines of $13 million and $11 million for the three months ended March 31, 2019 and 2018, respectively. Total O&M expenses presented include related party amounts of $24 million and $24 million for the three months ended March 31, 2019 and 2018, respectively.
[4]	Prior-period financial information has been retrospectively adjusted to include the adoption of an accounting standards update related to leases.
[5]	Prior-period financial information has been retrospectively adjusted to include the adoption of an accounting standards update related to leases.
[6]	Prior-period financial information has been retrospectively adjusted to include the adoption of an accounting standards update related to leases.

Condensed Consolidated Statem_2

Condensed Consolidated Statements of Income (Loss) (Parenthetical) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Income Statement [Abstract]
Related party revenues	$ 1	$ 2
Operations and maintenance related to renewable energy projects	38	29
Operations and maintenance related to Texas pipelines	13	11
Operations and maintenance related party	$ 24	$ 24

Condensed Consolidated Statem_3

Condensed Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2019	Mar. 31, 2018
Statement of Comprehensive Income [Abstract]
NET LOSS		$ (121)	$ (19)	[1],[2],[3]
OTHER COMPREHENSIVE INCOME, NET OF TAX
Reclassification from AOCI to net income (net of $0 tax benefit and $1 tax expense, respectively)		(6)
Reclassification from AOCI to net income (net of $0 tax benefit and $1 tax expense, respectively)	[4]		1
Net unrealized losses on foreign currency translation (net of $0 and $0 tax benefit, respectively)		0	(4)	[4]
Other comprehensive income related to equity method investee (net of $0 and $0 tax expense, respectively)		1	4	[4]
Total other comprehensive income (loss), net of tax		(5)	1	[3],[4]
COMPREHENSIVE LOSS		(126)	(18)	[4]
Net income attributable to preferred distributions		(6)	(6)	[1],[4]
Less comprehensive income (loss) attributable to noncontrolling interest		108	98	[4]
COMPREHENSIVE INCOME (LOSS) ATTRIBUTABLE TO NEXTERA ENERGY PARTNERS, LP		$ (24)	$ 74	[4]
[1]	Prior-period financial information has been retrospectively adjusted to include the adoption of an accounting standards update related to leases.
[2]	Prior-period financial information has been retrospectively adjusted to include the adoption of an accounting standards update related to leases.
[3]	Prior-period financial information has been retrospectively adjusted to include the adoption of an accounting standards update related to leases.
[4]	Prior-period financial information has been retrospectively adjusted to include the adoption of an accounting standards update related to leases.

Condensed Consolidated Statem_4

Condensed Consolidated Statements of Comprehensive Income (Loss) (Parenthetical) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2019	Mar. 31, 2018
Statement of Comprehensive Income [Abstract]
Reclassification from AOCI to net income, tax		$ 0
Reclassification from AOCI to net income, tax	[1]		$ 1
Unrealized gains (losses) on foreign currency translation, tax		0	0	[1]
Other comprehensive income (loss) related to equity method investee, tax (benefit) expense		$ 0	$ 0	[1]
[1]	Prior-period financial information has been retrospectively adjusted to include the adoption of an accounting standards update related to leases.

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 127	$ 147
Accounts receivable	71	63
Other receivables	23	17
Due from related parties	43	68
Restricted cash	6	8
Other current assets	36	37
Total current assets	306	340
Non-current assets:
Property, plant and equipment - net	6,713	6,770
Deferred income taxes	114	108
Investment in equity method investee	210	214
Investments in non-economic ownership interests	7	20
Goodwill	584	584
Other non-current assets	111	108
Total non-current assets	8,987	9,065
TOTAL ASSETS	9,293	9,405
Current liabilities:
Accounts payable and accrued expenses	11	10
Due to related parties	46	45
Current portion of long-term debt	694	707
Accrued interest	13	31
Accrued property taxes	8	19
Other current liabilities	39	47
Total current liabilities	811	859
Non-current liabilities:
Long-term debt	2,719	2,728
Deferred income taxes	12	12
Asset retirement obligation	97	95
Derivatives	217	104
Non-current due to related party	58	34
Other non-current liabilities	34	35
Total non-current liabilities	3,137	3,008
TOTAL LIABILITIES	3,948	3,867
COMMITMENTS AND CONTINGENCIES
EQUITY
Preferred units (14.0 and 14.0 units issued and outstanding, respectively)	548	548
Common units (56.2 and 56.1 units issued and outstanding, respectively)	1,757	1,804
Accumulated other comprehensive loss	(8)	(6)
Noncontrolling interests	3,048	3,192
TOTAL EQUITY	5,345	5,538
TOTAL LIABILITIES AND EQUITY	9,293	9,405
Intangible assets – customer relationships - net
Non-current assets:
Intangible assets	640	644
Intangible assets – PPAs - net
Non-current assets:
Intangible assets	$ 608	$ 617

Condensed Consolidated Balanc_2

Condensed Consolidated Balance Sheets (Parenthetical) - shares shares in Millions	Mar. 31, 2019	Dec. 31, 2018
Statement of Financial Position [Abstract]
Preferred units issued (in shares)	14	14
Preferred units outstanding (in shares)	14	14
Common units issued (in shares)	56.2	56.1
Common units outstanding (in shares)	56.2	56.1

Condensed Consolidated Statem_5

Condensed Consolidated Statements of Cash Flows - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	[2]
CASH FLOWS FROM OPERATING ACTIVITIES
Net loss	$ (121)	$ (19)	[1],[3]
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	61	53	[1]
Intangible amortization - PPA	9	0
Change in value of derivative contracts	115	51
Deferred income taxes	(7)	16
Equity in earnings of equity method investee, net of distributions received	5	7
Equity in losses (earnings) of non-economic ownership interests	7	(6)	[1]
Other - net	2	(2)
Changes in operating assets and liabilities:
Other current assets	(13)	(9)
Other non-current assets	(3)	3
Other current liabilities	(36)	(39)
Other non-current liabilities	0	(2)
Net cash provided by operating activities	19	53
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(3)	(4)
Payments from (to) related parties under CSCS agreement - net	24	(2)
Net cash provided by (used in) investing activities	21	(6)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from issuance of common units - net	3	0
Retirements of long-term debt	(24)	(31)
Partner contributions	1	29
Partner distributions	(74)	(66)
Preferred unit distributions	(6)	(3)
Proceeds from differential membership investors	32	28
Payments to differential membership investors	(8)	(5)
Payments to NEP OpCo subsidiary investor	(5)	0
Change in amounts due to related parties	19	0
Net cash used in financing activities	(62)	(48)
Effect of exchange rate changes on cash, cash equivalents and restricted cash	0	(1)
NET DECREASE IN CASH, CASH EQUIVALENTS AND RESTRICTED CASH	(22)	(2)
CASH, CASH EQUIVALENTS AND RESTRICTED CASH - BEGINNING OF PERIOD	166	198
CASH, CASH EQUIVALENTS AND RESTRICTED CASH - END OF PERIOD	144	196
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION:
Partner noncash distributions	3	17
Accrued preferred distributions	$ 6	$ 6
[1]	Prior-period financial information has been retrospectively adjusted to include the adoption of an accounting standards update related to leases.
[2]	Prior-period financial information has been retrospectively adjusted to include the adoption of an accounting standards update related to leases.
[3]	Prior-period financial information has been retrospectively adjusted to include the adoption of an accounting standards update related to leases.

Condensed Consolidated Statem_6

Condensed Consolidated Statements of Changes in Equity - USD ($) shares in Millions, $ in Millions		Total		Preferred Units [Member]	Preferred Partner [Member]	Units [Member]	Limited Partners [Member]		Accumulated Other Comprehensive Income (Loss) [Member]	Non-controlling Interests [Member]
Beginning balance, units at Dec. 31, 2017				14		54.3
Beginning balance at Dec. 31, 2017		$ 2,224	[1]		$ 548		$ 1,641	[1]	$ 1	$ 34	[1]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Related party note receivable	[1]	29								29
Net income		(19)	[1],[2],[3]		6		74	[1]		(99)	[1]
Other comprehensive income (loss)	[1]	1	[4]							1
Related party distributions	[1]	(64)								(64)
Changes in non-economic ownership interests	[1]	(6)								(6)
Differential membership interests activity	[1]	23								23
Distributions to unitholders	[5]	(28)	[1]		(6)		(22)	[1]
Ending balance, units at Mar. 31, 2018				14		54.3
Ending balance at Mar. 31, 2018		3,583	[1]		548		1,702	[1]	1	1,332	[1]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accrued preferred distributions	[3]	$ 6
Beginning balance, units at Dec. 31, 2018		56.1		14		56.1
Beginning balance at Dec. 31, 2018		$ 5,538			548		1,804		(6)	3,192
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common units (in units)						0.1
Issuance of common units - net		1					1
Net income		(121)			6		(22)			(105)
Other comprehensive income (loss)		(5)							(2)	(3)
Related party contributions		1								1
Related party distributions		(51)								(51)
Changes in non-economic ownership interests		(6)								(6)
Differential membership interests activity		24								24
Payments to NEP OpCo subsidiary investor		(5)								(5)
Distributions to unitholders	[5]	(32)			(6)		(26)
Other		$ 1								1
Ending balance, units at Mar. 31, 2019		56.2		14		56.2
Ending balance at Mar. 31, 2019		$ 5,345			$ 548		$ 1,757		$ (8)	$ 3,048
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accrued preferred distributions		$ 6
[1]	Prior-period financial information has been retrospectively adjusted to include the adoption of an accounting standards update related to leases.
[2]	Prior-period financial information has been retrospectively adjusted to include the adoption of an accounting standards update related to leases.
[3]	Prior-period financial information has been retrospectively adjusted to include the adoption of an accounting standards update related to leases.
[4]	Prior-period financial information has been retrospectively adjusted to include the adoption of an accounting standards update related to leases.
[5]	Distributions per common unit of $0.4650 and $0.4050 were paid during the three months ended March 31, 2019 and 2018, respectively. At March 31, 2019, $6 million of preferred unit distributions were accrued and are payable in May 2019.

Acquisitions

Acquisitions	3 Months Ended
	Mar. 31, 2019
Business Combinations [Abstract]
Acquisitions	Acquisitions In March 2019, an indirect subsidiary of NEP entered into an agreement with indirect subsidiaries of NEER to acquire: • 100% of the membership interests in Ashtabula Wind II, LLC, a project company that owns a 120 MW wind generation facility located in North Dakota; • 100% of the membership interests in Garden Wind, LLC, a project company that owns a 150 MW wind generation facility (Story County II) located in Iowa; • 100% of the membership interests in White Oak Energy Holdings, LLC, which, at closing, is expected to own 100% of the membership interests of White Oak Energy LLC, which owns a 150 MW wind generation facility located in Illinois; • 100% of the Class C membership interests in Rosmar Holdings, LLC, which represent a 49.99% noncontrolling ownership interest in two solar generation facilities, Marshall and Roswell, with a total combined generating capacity of approximately 132 MW located in Minnesota and New Mexico, respectively; and • 49.99% of the membership interests, representing a controlling ownership interest, in Silver State South Solar, LLC, which indirectly owns a 250 MW solar generation facility located in Nevada. NEP expects to complete the acquisition in the second quarter of 2019, subject to customary closing conditions and the receipt of certain regulatory approvals, for a total consideration of approximately $1,020 million , subject to customary working capital and other adjustments. In December 2018, a subsidiary of NEP completed the acquisition from NEER of NEP Renewables, which indirectly owns ten wind and one solar generation facilities with a combined generating capacity of approximately 1,388 MW. Supplemental Unaudited Pro forma Results of Operations NEP’s pro forma results of operations, had the acquisition of NEP Renewables been completed on January 1, 2017, are as follows: Three Months Ended (millions) Unaudited pro forma results of operations: Pro forma revenues $ 242 Pro forma operating income $ 98 Pro forma net loss $ (29 ) Pro forma net income attributable to NEP $ 122 The unaudited pro forma consolidated results of operations include adjustments to: • reflect the historical results of NEP Renewables beginning on January 1, 2017; • reflect the estimated depreciation and amortization expense based on the estimated fair value of property, plant and equipment - net and the intangible assets - PPAs; • reflect allocations of income to noncontrolling interests related to the financing transaction to fund the acquisition; and • reflect related income tax effects. The unaudited pro forma information is not necessarily indicative of the results of operations that would have occurred had the transaction been made at the beginning of the periods presented or the future results of the consolidated operations.

Revenue

Revenue	3 Months Ended
	Mar. 31, 2019
Revenue from Contract with Customer [Abstract]
Revenue	Revenue NEP's operating revenues are generated primarily from various non-affiliated parties under PPAs and natural gas transportation agreements. Revenue is recognized as energy and any related renewable energy attributes are delivered, based on rates stipulated in the respective PPAs, or natural gas transportation services are performed. NEP believes that the obligation to deliver energy and provide the natural gas transportation services is satisfied over time as the customer simultaneously receives and consumes benefits provided by NEP. In addition, NEP believes that the obligation to deliver renewable energy attributes is satisfied at multiple points in time, with the control of the renewable energy attribute being transferred at the same time the related energy is delivered. Included in NEP’s operating revenues for the three months ended March 31, 2019 is approximately $125 million and $52 million , and for the three months ended March 31, 2018 is $144 million and $55 million , of revenue from contracts with customers for renewable energy sales and natural gas transportation services, respectively. NEP's accounts receivable are primarily associated with revenues earned from contracts with customers. Receivables represent unconditional rights to consideration and reflect the differences in timing of revenue recognition and cash collections. For substantially all of NEP's receivables, regardless of the type of revenue transaction from which the receivable originated, customer and counterparty credit risk is managed in the same manner and the terms and conditions of payment are similar. NEP recognizes revenues as energy and any related renewable energy attributes are delivered or natural gas transportation services are performed, consistent with the amounts billed to customers based on rates stipulated in the respective PPAs. NEP considers the amount billed to represent the value of energy delivered or services provided to the customer. NEP’s customers typically receive bills monthly with payment due within 30 days. The contracts with customers related to pipeline service revenues contain a fixed price related to firm natural gas transportation capacity with maturity dates ranging from 2019 to 2035. At March 31, 2019 , NEP expects to record approximately $2.2 billion of revenues over the remaining terms of the related contracts as the capacity is provided. Revenues yet to be earned under contracts with customers to deliver energy and any related energy attributes, which have maturity dates ranging from 2030 to 2046, will vary based on the volume of energy delivered.

Income Taxes

Income Taxes	3 Months Ended
	Mar. 31, 2019
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes Income taxes are calculated for NEP as a single taxpaying corporation for U.S. federal and state income taxes (based on its election to be taxed as a corporation). Because NEP OpCo is a limited partnership, NEP only recognizes in income its applicable ownership share of U.S. income taxes related to the U.S. projects and, prior to the sale of Canadian Holdings in June 2018, the Canadian projects. NEP's former Canadian subsidiaries were all Canadian taxpayers, and therefore NEP recognized in income all of the Canadian taxes. Income taxes include NEP's applicable ownership share of U.S. taxes and 100% of Canadian taxes. Net income or loss attributable to noncontrolling interests includes no U.S. taxes and NEER's applicable ownership share of Canadian taxes. Net income attributable to NEP includes NEP's applicable ownership share of U.S. and Canadian taxes. The effective tax rate for the three months ended March 31, 2019 was approximately 5% . The effective tax rate is primarily affected by taxes attributable to the noncontrolling interests. During the three months ended March 31, 2018 , the effective tax rate was not meaningful as NEP recorded an income tax charge of approximately $20 million related to the $231 million adjustment to differential membership interests as a result of the change in federal corporate income taxes due to the Tax Cuts and Jobs Act that became effective January 1, 2018 (see Note 10 - Noncontrolling Interests).

Fair Value Measurements

Fair Value Measurements	3 Months Ended
	Mar. 31, 2019
Fair Value Disclosures [Abstract]
Fair Value Measurements	Fair Value Measurements The fair value of assets and liabilities are determined using either unadjusted quoted prices in active markets (Level 1) or pricing inputs that are observable (Level 2) whenever that information is available and using unobservable inputs (Level 3) to estimate fair value only when relevant observable inputs are not available. NEP uses several different valuation techniques to measure the fair value of assets and liabilities relying primarily on the market approach of using prices and other market information for identical and/or comparable assets and liabilities for those assets and liabilities that are measured at fair value on a recurring basis. Certain financial instruments may be valued using multiple inputs including discount rates, counterparty credit ratings and credit enhancements. NEP’s assessment of the significance of any particular input to the fair value measurement requires judgment and may affect the placement of those assets and liabilities within the fair value hierarchy levels. Non-performance risk, including the consideration of a credit valuation adjustment, is also considered in the determination of fair value for all assets and liabilities measured at fair value. Transfers between fair value hierarchy levels occur at the beginning of the period in which the transfer occurred. Cash Equivalents and Restricted Cash Equivalents - The fair value of money market funds that are included in cash and cash equivalents, restricted cash and other non-current assets on the condensed consolidated balance sheets is estimated using a market approach based on current observable market prices. Interest Rate Contracts - NEP estimates the fair value of its derivatives using an income approach based on a discounted cash flows valuation technique utilizing the net amount of estimated future cash inflows and outflows related to the agreements. The primary inputs used in the fair value measurements include the contractual terms of the derivative agreements, current interest rates and credit profiles. The significant inputs for the resulting fair value measurement are market-observable inputs and the measurements are reported as Level 2 in the fair value hierarchy. NEP’s financial assets and liabilities and other fair value measurements made on a recurring basis by fair value hierarchy level are as follows: March 31, 2019 December 31, 2018 Level 1 Level 2 Total Level 1 Level 2 Total (millions) Assets: Cash equivalents $ 14 $ — $ 14 $ 71 $ — $ 71 Restricted cash equivalents (a) 10 — 10 12 — 12 Interest rate contracts — 5 5 — 24 24 Total assets $ 24 $ 5 $ 29 $ 83 $ 24 $ 107 Liabilities: Interest rate contracts $ — $ 217 $ 217 $ — $ 116 $ 116 Total liabilities $ — $ 217 $ 217 $ — $ 116 $ 116 ____________________ (a) At March 31, 2019 and December 31, 2018 , approximately $9 million and $9 million , respectively, of restricted cash equivalents are included in other non-current assets on NEP's condensed consolidated balance sheets. Financial Instruments Recorded at Other than Fair Value - The carrying amounts and estimated fair values of other financial instruments recorded at other than fair value are as follows: March 31, 2019 December 31, 2018 Carrying Value Fair Value Carrying Value Fair Value (millions) Long-term debt, including current maturities (a) $ 3,413 $ 3,392 $ 3,435 $ 3,301 ____________________ (a) At March 31, 2019 and December 31, 2018 , approximately $2,958 million and $2,826 million , respectively, of the fair value is estimated using a market approach based on quoted market prices for the same or similar issues (Level 2); the balance is estimated using an income approach utilizing a discounted cash flow valuation technique, considering the current credit profile of the debtor (Level 3).

Derivative Instruments and Hedg

Derivative Instruments and Hedging Activity	3 Months Ended
	Mar. 31, 2019
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Instruments and Hedging Activity	Derivative Instruments and Hedging Activity NEP uses derivative instruments (primarily interest rate swaps) to manage the interest rate cash flow risk associated primarily with outstanding and expected future debt issuances and borrowings. NEP records all derivative instruments that are required to be marked to market as either assets or liabilities on its condensed consolidated balance sheets and measures them at fair value each reporting period. NEP does not utilize hedge accounting for its derivative instruments. All changes in the derivatives' fair value are recognized in interest expense in the condensed consolidated statements of income (loss). In general, the commencement and termination dates of the interest rate swap agreements and the related hedging relationship coincide with the corresponding dates of the underlying variable-rate debt instruments. At March 31, 2019 and December 31, 2018 , the combined notional amounts of the interest rate contracts were approximately $9,246 million and $9,256 million , respectively. During the three months ended March 31, 2019 , NEP reclassified approximately $6 million from AOCI to interest expense primarily because it became probable that related future transactions being hedged would not occur. At March 31, 2019 , NEP's AOCI does not include any amounts related to discontinued cash flow hedges. Cash flows from the interest rate swap contracts are reported in cash flows from operating activities in the condensed consolidated statements of cash flows. Prior to the sale of Canadian Holdings in June 2018, NEP entered into certain foreign currency exchange contracts to economically hedge its cash flows from foreign currency rate fluctuations. During the three months ended March 31, 2018 , NEP recorded approximately $1 million of gains related to the foreign currency contracts in other - net in the condensed consolidated statements of income (loss). Fair Value of Derivative Instruments - The tables below present NEP's gross derivative positions, based on the total fair value of each derivative instrument, at March 31, 2019 and December 31, 2018 , as required by disclosure rules, as well as the location of the net derivative positions, based on the expected timing of future payments, on the condensed consolidated balance sheets. March 31, 2019 Gross Basis Net Basis Assets Liabilities Assets Liabilities (millions) Interest rate contracts $ 5 $ 217 $ 7 $ 219 Net fair value by balance sheet line item: Other current assets $ 5 Other non-current assets 2 Other current liabilities $ 2 Derivatives 217 Total derivatives $ 7 $ 219 December 31, 2018 Gross Basis Net Basis Assets Liabilities Assets Liabilities (millions) Interest rate contracts $ 24 $ 116 $ 13 $ 105 Net fair value by balance sheet line item: Other current assets $ 7 Other non-current assets 6 Other current liabilities $ 1 Derivatives 104 Total derivatives $ 13 $ 105 Financial Statement Impact of Derivative Instruments - Gains (losses) related to NEP's interest rate contracts are recorded in the condensed consolidated financial statements as follows: Three Months Ended March 31, 2019 2018 (millions) Interest rate contracts: Gains (losses) reclassified from AOCI to interest expense $ 6 $ (2 ) Losses recognized in interest expense $ (118 ) $ (52 ) Credit-Risk-Related Contingent Features - Certain of NEP's derivative instruments contain credit-related cross-default and material adverse change triggers, none of which contain requirements to maintain certain credit ratings or financial ratios. At March 31, 2019 and December 31, 2018 , the aggregate fair value of NEP's derivative instruments with contingent risk features that were in a liability position was approximately $196 million and $108 million , respectively.

Variable Interest Entities

Variable Interest Entities	3 Months Ended
	Mar. 31, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Variable Interest Entities	Variable Interest Entities NEP has identified NEP OpCo, a limited partnership with a general partner and limited partners, as a VIE. NEP has consolidated the results of NEP OpCo and its subsidiaries because of its controlling interest in the general partner of NEP OpCo. At March 31, 2019 , NEP owned an approximately 35.6% limited partner interest in NEP OpCo and NEE Equity owned a noncontrolling 64.4% limited partner interest in NEP OpCo (NEE's noncontrolling interest). The assets and liabilities of NEP OpCo as well as the operations of NEP OpCo represent substantially all of NEP's assets and liabilities and its operations. In addition, at March 31, 2019 , NEP OpCo consolidated 12 VIEs related to certain subsidiaries that have sold differential membership interests in entities which own and operate 20 wind electric generation facilities. These entities are considered VIEs because the holders of the differential membership interests do not have substantive rights over the significant activities of these entities. The assets, primarily property, plant and equipment - net, and liabilities, primarily asset retirement obligation and non-current due to related party, of the VIEs, totaled approximately $4,895 million and $112 million , respectively, at March 31, 2019 and $4,937 million and $132 million , respectively, at December 31, 2018 . At March 31, 2019 , NEP OpCo also consolidated a VIE related to a noncontrolling Class B interest in NEP Renewables. This entity is considered a VIE because the holder of the noncontrolling Class B interest does not have substantive rights over the significant activities of the entity. The assets, primarily property, plant and equipment - net and liabilities, primarily long-term debt and asset retirement obligation, of the VIE totaled approximately $2,319 million and $92 million at March 31, 2019 and $2,339 million and $89 million , respectively, at December 31, 2018. NEP has an indirect equity method investment in three NEER solar projects with a total generating capacity of 277 MW. Through a series of transactions, a subsidiary of NEP issued 1,000,000 NEP OpCo Class B Units, Series 1 and 1,000,000 NEP OpCo Class B Units, Series 2, to NEER for approximately 50% of the ownership interests in the three solar projects (non-economic ownership interests). NEER, as holder of the NEP OpCo Class B Units, will retain 100% of the economic rights in the projects to which the respective Class B Units relate, including the right to all distributions paid by the project subsidiaries that own the projects to NEP OpCo. NEER has agreed to indemnify NEP against all risks relating to NEP’s ownership of the projects until NEER offers to sell economic interests to NEP and NEP accepts such offer, if NEP chooses to do so. NEER has also agreed to continue to manage the operation of the projects at its own cost, and to contribute to the projects any capital necessary for the operation of the projects, until NEER offers to sell economic interests to NEP and NEP accepts such offer. At March 31, 2019 and December 31, 2018 , NEP's equity method investment related to the non-economic ownership interests is reflected as investments in non-economic ownership interests on the condensed consolidated balance sheets. All equity in earnings of the non-economic ownership interests is allocated to net income attributable to noncontrolling interests. NEP is not the primary beneficiary and therefore does not consolidate these entities because it does not control any of the ongoing activities of these entities, was not involved in the initial design of these entities and does not have a controlling interest in these entities.

Capitalization

Capitalization	3 Months Ended
	Mar. 31, 2019
Equity [Abstract]
Capitalization	Capitalization Equity - On April 22, 2019 , the board of directors of NEP authorized a distribution of $ 0.4825 per common unit payable on May 15, 2019 to its common unitholders of record on May 7, 2019 . In March 2019, NEP and two of its indirect subsidiaries, NEP Renewables Holdings II, LLC (NEP Renewables Holdings II) and NEP Renewables II, LLC (NEP Renewables II), entered into a membership interest purchase agreement (membership purchase agreement) with a third-party investor (NEP Renewables II investor) for the purpose of financing the 2019 acquisition of the projects described in Note 1 and the recapitalization of four existing wind projects indirectly owned by NEP. The NEP Renewables II investor has committed to pay approximately $900 million to NEP Renewables Holdings II for 100% of the noncontrolling Class B membership interest in NEP Renewables II, subject to the specified conditions set forth in the membership purchase agreement. NEP Renewables Holdings II will retain 100% of the Class A membership interest and NEP will consolidate NEP Renewables II, which will be considered a VIE because the NEP Renewables II investor will not have substantive rights over the significant activities of NEP Renewables II. Prior to closing, an indirect subsidiary of NEP will transfer to NEP Renewables II the ownership interests to be purchased from NEER in 2019 as described in Note 1 as well as 100% of the membership interests in entities that own (1) Perrin Ranch Wind Energy Center, an approximately 99 MW wind generation facility located in Arizona; (2) Tuscola Bay Wind Energy Center, a 120 MW wind generation facility located in Michigan; (3) Ashtabula Wind III Energy Center, an approximately 62 MW wind generation facility located in North Dakota; and (4) Stateline Wind Energy Center, a 300 MW wind generation facility located in Oregon and Washington. Under the amended and restated limited liability company agreement for NEP Renewables II (the LLC agreement) that will be entered into at closing, NEP, through its indirect ownership of NEP Renewables Holdings II, will receive approximately 95% of NEP Renewables II’s cash distributions for the first six years after closing, and the NEP Renewables II investor will receive 5% . From the third and one-half to the sixth anniversary of the closing, NEP has the option (the buyout right), subject to certain limitations and extensions, to periodically purchase the NEP Renewables II investor’s interest in NEP Renewables at a buyout price that implies a fixed pre-tax annual return of approximately 8.3% to the NEP Renewables II investor (inclusive of all prior distributions). If exercised, NEP has the right to pay at least 70% of the buyout price in NEP non-voting common units, issued at the then-current market price of NEP common units, with the balance paid in cash, subject to limitations as described in the LLC agreement. Following the sixth anniversary after closing, if NEP has not exercised its entire buyout right, or following the four and one-half year anniversary after closing if certain minimum buyouts have not occurred, the NEP Renewables II investor’s allocation of distributable cash flow from the portfolio for the portion of the Class B membership interest that the NEP Renewables II investor still owns would increase to 99% . Beginning January 1, 2025, NEP will give the NEP Renewables II investor, under a registration rights agreement to be entered into at closing, certain rights to require NEP, under certain circumstances, to initiate underwritten offerings for the units that are issuable if NEP exercises the buyout right. Following any exercise of the buyout right, the NEP Renewables II investor will have, among other terms, the right to receive pro rata quarterly cash distributions with respect to the NEP non-voting common units it owns and rights, subject to certain limitations, to convert the NEP non-voting common units into NEP common units on a one-for-one basis. Earnings Per Unit - Diluted earnings per unit are based on the weighted-average number of common units and potential common units outstanding during the period, including the dilutive effect of the convertible notes and preferred units. The dilutive effect of the convertible notes and preferred units is computed using the if-converted method. The reconciliation of NEP's basic and diluted earnings per unit is as follows: Three Months Ended (millions, except per unit amounts) Numerator: Net income attributable to NEP – basic $ 74 Adjustments for convertible notes and preferred units 16 Net income attributable to NEP – assuming dilution $ 90 Denominator: Weighted-average number of common units outstanding – basic 54.3 Convertible notes and preferred units 19.7 Weighted-average number of common units outstanding – assuming dilution 74.0 Earnings per unit attributable to NEP: Basic $ 1.36 Assuming dilution $ 1.22 The weighted-average number of common units issuable pursuant to the convertible notes and preferred units that were not included in the calculation of diluted earnings per unit due to their antidilutive effect totaled approximately 19.7 million for the three months ended March 31, 2019.

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income (Loss)	3 Months Ended
	Mar. 31, 2019
Equity [Abstract]
Accumulated Other Comprehensive (Income) Loss	Accumulated Other Comprehensive Income (Loss) Accumulated Other Comprehensive Income (Loss) Net Unrealized Other Comprehensive Income (Loss) Related to Equity Method Investee Total (millions) Three months ended March 31, 2019 Balances, December 31, 2018 $ 6 $ (24 ) $ (18 ) Amounts reclassified from AOCI to interest expense (6 ) — (6 ) Other comprehensive income related to equity method investee — 1 1 Net other comprehensive income (loss) (6 ) 1 (5 ) Balances, March 31, 2019 $ — $ (23 ) $ (23 ) AOCI attributable to noncontrolling interest $ — $ (15 ) $ (15 ) AOCI attributable to NEP $ — $ (8 ) $ (8 ) Accumulated Other Comprehensive Income (Loss) Net Unrealized Net Unrealized Other Comprehensive Income (Loss) Related to Equity Method Investee Total (millions) Three months ended March 31, 2018 Balances, December 31, 2017 $ 1 $ (98 ) $ (30 ) $ (127 ) Amounts reclassified from AOCI to interest expense 1 — — 1 Net unrealized losses on foreign currency translation — (4 ) — (4 ) Other comprehensive income related to equity method investee — — 4 4 Net other comprehensive income (loss) 1 (4 ) 4 1 Balances, March 31, 2018 $ 2 $ (102 ) $ (26 ) $ (126 ) AOCI attributable to noncontrolling interest $ — $ (99 ) $ (28 ) $ (127 ) AOCI attributable to NEP $ 2 $ (3 ) $ 2 $ 1

Related Party Transactions

Related Party Transactions	3 Months Ended
	Mar. 31, 2019
Related Party Transactions [Abstract]
Related Party Transactions	Related Party Transactions Each project entered into O&M agreements and ASAs with subsidiaries of NEER whereby the projects pay a certain annual fee plus actual costs incurred in connection with certain O&M and administrative services performed under these agreements. These services are reflected as operations and maintenance in the condensed consolidated statements of income (loss). Additionally, a NEP subsidiary pays an affiliate for transmission services which are reflected as operations and maintenance in the condensed consolidated statements of income (loss). Certain projects have also entered into various types of agreements including those related to shared facilities and transmission lines, transmission line easements, technical support and construction coordination with subsidiaries of NEER whereby certain fees or cost reimbursements are paid to, or received by, certain subsidiaries of NEER. Management Services Agreement - Under the MSA, an indirect wholly owned subsidiary of NEE provides operational, management and administrative services to NEP, including managing NEP’s day-to-day affairs and providing individuals to act as NEP’s executive officers and directors, in addition to those services that are provided under the existing O&M agreements and ASAs described above between NEER subsidiaries and NEP subsidiaries. NEP OpCo pays NEE an annual management fee equal to the greater of 1% of the sum of NEP OpCo’s net income plus interest expense, income tax expense and depreciation and amortization expense less certain non-cash, non-recurring items for the most recently ended fiscal year and $4 million (as adjusted for inflation beginning in 2016), which is paid in quarterly installments with an additional payment each January to the extent 1% of the sum of NEP OpCo’s net income plus interest expense, income tax expense and depreciation and amortization expense less certain non-cash, non-recurring items for the preceding fiscal year exceeds $4 million (as adjusted for inflation beginning in 2016). NEP OpCo also makes certain payments to NEE based on the achievement by NEP OpCo of certain target quarterly distribution levels to its unitholders. NEP’s O&M expenses for the three months ended March 31, 2019 and 2018 include approximately $22 million and $18 million , respectively, related to the MSA. Cash Sweep and Credit Support Agreement - NEP OpCo is a party to the CSCS agreement with NEER under which NEER and certain of its affiliates provide credit support in the form of letters of credit and guarantees to satisfy NEP’s subsidiaries’ contractual obligations. NEP OpCo pays NEER an annual credit support fee based on the level and cost of the credit support provided, payable in quarterly installments. NEP’s O&M expenses for the three months ended March 31, 2019 and 2018 include approximately $1 million and $1 million , respectively, related to the CSCS agreement. NEER and certain of its affiliates may withdraw funds (Project Sweeps) received by NEP OpCo under the CSCS agreement, or its subsidiaries in connection with certain long-term debt agreements, and hold those funds in accounts belonging to NEER or its affiliates to the extent the funds are not required to pay project costs or otherwise required to be maintained by NEP's subsidiaries. NEER and its affiliates may keep the funds until the financing agreements permit distributions to be made, or, in the case of NEP OpCo, until such funds are required to make distributions or to pay expenses or other operating costs or NEP OpCo otherwise demands the return of such funds. If NEER or its affiliates fail to return withdrawn funds when required by NEP's subsidiaries’ financing agreements, the lenders will be entitled to draw on any credit support provided by NEER or its affiliates in the amount of such withdrawn funds. If NEER or one of its affiliates realizes any earnings on the withdrawn funds prior to the return of such funds, it will be permitted to retain those earnings. At March 31, 2019 and December 31, 2018 , the cash sweep amounts held in accounts belonging to NEER or its affiliates were approximately $42 million and $66 million , respectively, and are included in due from related parties on the condensed consolidated balance sheets. Guarantees and Letters of Credit Entered into by Related Parties - Certain PPAs include requirements of the project entities to meet certain performance obligations. NEECH or NEER has provided letters of credit or guarantees for certain of these performance obligations and payment of any obligations from the transactions contemplated by the PPAs . In addition, certain financing agreements require cash and cash equivalents to be reserved for various purposes . In accordance with the terms of these financing agreements, guarantees from NEECH have been substituted in place of these cash and cash equivalents reserve requirements. Also, under certain financing agreements, indemnifications have been provided by NEECH. In addition, certain interconnection agreements and site certificates require letters of credit or a bond to secure certain payment or restoration obligations related to those agreements. NEECH also guarantees the Project Sweep amounts held in accounts belonging to NEER, as described above. At March 31, 2019 , NEECH or NEER guaranteed or provided indemnifications, letters of credit or bonds totaling approximately $691 million related to these obligations. Agreements related to the sale of differential membership interests require NEER to guarantee payments due by the VIEs and the indemnifications to the VIEs' respective investors. At March 31, 2019 , NEER guaranteed a total of approximately $69 million related to these obligations. Due to Related Party - Non-current amounts due to related party on the condensed consolidated balance sheets primarily represent amounts owed by certain of NEP's wind projects to NEER to refund NEER for certain transmission costs paid on behalf of the wind projects. Amounts will be paid to NEER as the wind projects receive payments from third parties for related notes receivable recorded in other non-current assets on the condensed consolidated balance sheets. During the three months ended March 31, 2019 , a subsidiary of NEECH provided, pursuant to a debt service reserve guarantee (see discussion above), approximately $20 million to fund the debt payment of Genesis Solar Funding, LLC which is reflected as non-current due to related party at March 31, 2019 . Transportation and Fuel Management Agreements - A subsidiary of NEP assigned to a subsidiary of NEER certain gas commodity agreements in exchange for entering into transportation agreements and a fuel management agreement whereby the benefits of the gas commodity agreements (net of transportation paid to the NEP subsidiary) are passed back to the NEP subsidiary. During the three months ended March 31, 2019 and 2018, NEP recognized approximately $1 million and $2 million , respectively, in revenues related to the transportation and fuel management agreements.

Summary of Significant Accounti

Summary of Significant Accounting and Reporting Policies	3 Months Ended
	Mar. 31, 2019
Accounting Policies [Abstract]
Summary of Significant Accounting and Reporting Policies	Summary of Significant Accounting and Reporting Policies Restricted Cash - Current restricted cash on NEP's condensed consolidated balance sheets and approximately $11 million and $11 million of other non-current assets on NEP's condensed consolidated balance sheets at March 31, 2019 and December 31, 2018 , respectively, are held by certain subsidiaries to pay for certain capital or operating expenditures, as well as to fund required equity contributions pursuant to restrictions contained in the subsidiaries' debt agreements. Restricted cash reported as current assets are recorded as such based on the anticipated use of these funds. Disposal of Canadian Holdings - In June 2018, a subsidiary of NEP completed the sale of Canadian Holdings for cash proceeds of approximately CAD $740 million (USD $563 million at June 29, 2018), subject to post-closing working capital adjustments of approximately $1 million . In addition, the purchaser assumed approximately $676 million of existing debt. Canadian Holdings owned four wind generation facilities and two solar generation facilities located in Ontario, Canada with a generating capacity totaling approximately 396 MW. Income before income taxes associated with Canadian Holdings was approximately $28 million for the three months ended March 31, 2018 . Noncontrolling Interests - At March 31, 2019 , NEE's 64.4% noncontrolling limited partner interest in NEP OpCo, a non-affiliated party's 10% interest in one of the Texas pipelines, the interests related to differential membership interests and the Class B noncontrolling interests in NEP Renewables sold in 2018 are reflected as noncontrolling interests on the condensed consolidated balance sheets. See Note 6. Details of the activity in noncontrolling interests for the three months ended March 31, 2019 and 2018 are below: Noncontrolling Ownership Interest in NEP OpCo Subsidiary Differential Membership Interests Noncontrolling Ownership Interests in NEP OpCo and Texas pipeline Total Noncontrolling (millions) Balances, December 31, 2018 $ 751 $ 2,019 $ 422 $ 3,192 Net income (loss) attributable to NCI 12 (a) (60 ) (b) (57 ) (105 ) Other comprehensive loss — — (3 ) (3 ) Related party contributions — — 1 1 Related party distributions — — (51 ) (51 ) Changes in non-economic ownership interests — — (6 ) (6 ) Differential membership interests contributions, net of distributions — 24 — 24 Payments to NEP OpCo subsidiary investor (5 ) — — (5 ) Other — — 1 1 Balances, March 31, 2019 $ 758 $ 1,983 $ 307 $ 3,048 Balances, December 31, 2017 $ — $ — $ 34 $ 34 Related party note receivable — — 29 29 Net income (loss) attributable to NCI — (269 ) (b) 170 (99 ) Other comprehensive income — — 1 1 Related party distributions — — (64 ) (64 ) Changes in non-economic ownership interests — — (6 ) (6 ) Differential membership investment contributions, net of distributions — 23 — 23 Adoption of accounting standards update — 1,413 1 1,414 Balances, March 31, 2018 $ — $ 1,167 $ 165 $ 1,332 ____________________ (a) For the three months ended March 31, 2019 , approximately $8 million of the income attributable to the NEP OpCo subsidiary investor benefits NEE's noncontrolling interest and $4 million is reflected as net income attributable to NEP. (b) Represents the benefits associated with differential membership interests recognized as third-party investors received their portion of the economic attributes of the related facilities. For the three months ended March 31, 2019 and 2018, approximately $39 million and $175 million , respectively, of the loss attributable to differential membership interests benefits NEE's noncontrolling interest and $21 million and $94 million , respectively, is reflected as net income attributable to NEP. For the three months ended March 31, 2018 , includes approximately $231 million (after-tax $211 million ) related to the reduction of differential membership interests as a result of the change in federal corporate income tax rates effective January 1, 2018.

Commitments and Contingencies

Commitments and Contingencies	3 Months Ended
	Mar. 31, 2019
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Letter of Credit Facilities - Two of NEP’s projects entered into letter of credit (LOC) facilities under which the LOC lenders may issue standby letters of credit not to exceed approximately $82 million in the aggregate. These LOC facilities have maturity dates of June 2022 and July 2022. At March 31, 2019 , approximately $68 million of LOCs was outstanding primarily related to debt service reserves and as security for certain of the projects' agreements, including a PPA. PG&E Bankruptcy - During the three months ended March 31, 2019 , approximately 2% of net loss attributable to NEP was from PPAs that the Genesis, Desert Sunlight and Shafter solar projects have with PG&E. On January 29, 2019, PG&E filed a voluntary petition for reorganization under Chapter 11 of the U.S. Bankruptcy Code. The Genesis and Shafter solar projects are financed with various forms of indebtedness. PG&E’s Chapter 11 filing, or related events, have caused events of default under the financings for the Genesis and Shafter projects, blocking the distribution of cash generated by those projects. Lenders under these financings could accelerate the repayment of borrowings thereunder or foreclose upon the projects’ equity or assets as a result of events of defaults caused by PG&E’s bankruptcy, which could have a material adverse impact on NEP. In addition, PG&E could seek to reject some or all of the PPAs. PG&E’s bankruptcy petition stated that PG&E has not yet made any decisions regarding whether to assume or reject any PPAs in its Chapter 11 case. At March 31, 2019 and December 31, 2018, the debt outstanding under the Genesis and Shafter financings totaled approximately $669 million and $682 million , respectively, of which $641 million with scheduled final maturity dates ranging from 2033 to 2038 was reclassified into current debt on the condensed consolidated balance sheets. Based on the estimated future cash flows related to the Genesis, Shafter and Desert Sunlight solar projects, no impairment adjustment was recorded at March 31, 2019. NEP will continue to monitor its investments in these projects. Unless a waiver or forbearance agreement is obtained or the events of default are otherwise cured, cash distributions from these projects generally are not able to be made. During the first quarter of 2019, approximately $38 million of cash distributions were not made.

Acquisitions (Tables)

Acquisitions (Tables)	3 Months Ended
	Mar. 31, 2019
Business Combinations [Abstract]
Supplemental Unaudited Pro forma Results of Operations	NEP’s pro forma results of operations, had the acquisition of NEP Renewables been completed on January 1, 2017, are as follows: Three Months Ended (millions) Unaudited pro forma results of operations: Pro forma revenues $ 242 Pro forma operating income $ 98 Pro forma net loss $ (29 ) Pro forma net income attributable to NEP $ 122

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	3 Months Ended
	Mar. 31, 2019
Fair Value Disclosures [Abstract]
Schedule of financial assets and liabilities and other fair value measurements on a recurring basis	NEP’s financial assets and liabilities and other fair value measurements made on a recurring basis by fair value hierarchy level are as follows: March 31, 2019 December 31, 2018 Level 1 Level 2 Total Level 1 Level 2 Total (millions) Assets: Cash equivalents $ 14 $ — $ 14 $ 71 $ — $ 71 Restricted cash equivalents (a) 10 — 10 12 — 12 Interest rate contracts — 5 5 — 24 24 Total assets $ 24 $ 5 $ 29 $ 83 $ 24 $ 107 Liabilities: Interest rate contracts $ — $ 217 $ 217 $ — $ 116 $ 116 Total liabilities $ — $ 217 $ 217 $ — $ 116 $ 116 ____________________ (a) At March 31, 2019 and December 31, 2018 , approximately $9 million and $9 million , respectively, of restricted cash equivalents are included in other non-current assets on NEP's condensed consolidated balance sheets.
Schedule of other financial instrument, carrying amounts and estimated fair values	The carrying amounts and estimated fair values of other financial instruments recorded at other than fair value are as follows: March 31, 2019 December 31, 2018 Carrying Value Fair Value Carrying Value Fair Value (millions) Long-term debt, including current maturities (a) $ 3,413 $ 3,392 $ 3,435 $ 3,301 ____________________ (a) At March 31, 2019 and December 31, 2018 , approximately $2,958 million and $2,826 million , respectively, of the fair value is estimated using a market approach based on quoted market prices for the same or similar issues (Level 2); the balance is estimated using an income approach utilizing a discounted cash flow valuation technique, considering the current credit profile of the debtor (Level 3).

Derivative Instruments and He_2

Derivative Instruments and Hedging Activity (Tables)	3 Months Ended
	Mar. 31, 2019
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of the fair values of derivative instruments designated as cash flow hedging instruments included in balance sheets	The tables below present NEP's gross derivative positions, based on the total fair value of each derivative instrument, at March 31, 2019 and December 31, 2018 , as required by disclosure rules, as well as the location of the net derivative positions, based on the expected timing of future payments, on the condensed consolidated balance sheets. March 31, 2019 Gross Basis Net Basis Assets Liabilities Assets Liabilities (millions) Interest rate contracts $ 5 $ 217 $ 7 $ 219 Net fair value by balance sheet line item: Other current assets $ 5 Other non-current assets 2 Other current liabilities $ 2 Derivatives 217 Total derivatives $ 7 $ 219 December 31, 2018 Gross Basis Net Basis Assets Liabilities Assets Liabilities (millions) Interest rate contracts $ 24 $ 116 $ 13 $ 105 Net fair value by balance sheet line item: Other current assets $ 7 Other non-current assets 6 Other current liabilities $ 1 Derivatives 104 Total derivatives $ 13 $ 105
Schedule of gains (losses) related to interest rate contracts	Gains (losses) related to NEP's interest rate contracts are recorded in the condensed consolidated financial statements as follows: Three Months Ended March 31, 2019 2018 (millions) Interest rate contracts: Gains (losses) reclassified from AOCI to interest expense $ 6 $ (2 ) Losses recognized in interest expense $ (118 ) $ (52 )

Capitalization (Tables)

Capitalization (Tables)	3 Months Ended
	Mar. 31, 2019
Equity [Abstract]
Schedule of Earnings Per Share, Basic and Diluted	The reconciliation of NEP's basic and diluted earnings per unit is as follows: Three Months Ended (millions, except per unit amounts) Numerator: Net income attributable to NEP – basic $ 74 Adjustments for convertible notes and preferred units 16 Net income attributable to NEP – assuming dilution $ 90 Denominator: Weighted-average number of common units outstanding – basic 54.3 Convertible notes and preferred units 19.7 Weighted-average number of common units outstanding – assuming dilution 74.0 Earnings per unit attributable to NEP: Basic $ 1.36 Assuming dilution $ 1.22

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Income (Loss) (Tables)	3 Months Ended
	Mar. 31, 2019
Equity [Abstract]
Schedule of accumulated other comprehensive income (loss)	Accumulated Other Comprehensive Income (Loss) Net Unrealized Other Comprehensive Income (Loss) Related to Equity Method Investee Total (millions) Three months ended March 31, 2019 Balances, December 31, 2018 $ 6 $ (24 ) $ (18 ) Amounts reclassified from AOCI to interest expense (6 ) — (6 ) Other comprehensive income related to equity method investee — 1 1 Net other comprehensive income (loss) (6 ) 1 (5 ) Balances, March 31, 2019 $ — $ (23 ) $ (23 ) AOCI attributable to noncontrolling interest $ — $ (15 ) $ (15 ) AOCI attributable to NEP $ — $ (8 ) $ (8 ) Accumulated Other Comprehensive Income (Loss) Net Unrealized Net Unrealized Other Comprehensive Income (Loss) Related to Equity Method Investee Total (millions) Three months ended March 31, 2018 Balances, December 31, 2017 $ 1 $ (98 ) $ (30 ) $ (127 ) Amounts reclassified from AOCI to interest expense 1 — — 1 Net unrealized losses on foreign currency translation — (4 ) — (4 ) Other comprehensive income related to equity method investee — — 4 4 Net other comprehensive income (loss) 1 (4 ) 4 1 Balances, March 31, 2018 $ 2 $ (102 ) $ (26 ) $ (126 ) AOCI attributable to noncontrolling interest $ — $ (99 ) $ (28 ) $ (127 ) AOCI attributable to NEP $ 2 $ (3 ) $ 2 $ 1

Summary of Significant Accoun_2

Summary of Significant Accounting and Reporting Policies (Tables)	3 Months Ended
	Mar. 31, 2019
Non-controlling Interests [Member]
Noncontrolling Interest [Line Items]
Schedule of Noncontrolling Interest	Details of the activity in noncontrolling interests for the three months ended March 31, 2019 and 2018 are below: Noncontrolling Ownership Interest in NEP OpCo Subsidiary Differential Membership Interests Noncontrolling Ownership Interests in NEP OpCo and Texas pipeline Total Noncontrolling (millions) Balances, December 31, 2018 $ 751 $ 2,019 $ 422 $ 3,192 Net income (loss) attributable to NCI 12 (a) (60 ) (b) (57 ) (105 ) Other comprehensive loss — — (3 ) (3 ) Related party contributions — — 1 1 Related party distributions — — (51 ) (51 ) Changes in non-economic ownership interests — — (6 ) (6 ) Differential membership interests contributions, net of distributions — 24 — 24 Payments to NEP OpCo subsidiary investor (5 ) — — (5 ) Other — — 1 1 Balances, March 31, 2019 $ 758 $ 1,983 $ 307 $ 3,048 Balances, December 31, 2017 $ — $ — $ 34 $ 34 Related party note receivable — — 29 29 Net income (loss) attributable to NCI — (269 ) (b) 170 (99 ) Other comprehensive income — — 1 1 Related party distributions — — (64 ) (64 ) Changes in non-economic ownership interests — — (6 ) (6 ) Differential membership investment contributions, net of distributions — 23 — 23 Adoption of accounting standards update — 1,413 1 1,414 Balances, March 31, 2018 $ — $ 1,167 $ 165 $ 1,332 ____________________ (a) For the three months ended March 31, 2019 , approximately $8 million of the income attributable to the NEP OpCo subsidiary investor benefits NEE's noncontrolling interest and $4 million is reflected as net income attributable to NEP. (b) Represents the benefits associated with differential membership interests recognized as third-party investors received their portion of the economic attributes of the related facilities. For the three months ended March 31, 2019 and 2018, approximately $39 million and $175 million , respectively, of the loss attributable to differential membership interests benefits NEE's noncontrolling interest and $21 million and $94 million , respectively, is reflected as net income attributable to NEP. For the three months ended March 31, 2018 , includes approximately $231 million (after-tax $211 million ) related to the reduction of differential membership interests as a result of the change in federal corporate income tax rates effective January 1, 2018.

Acquisitions - Narrative (Detai

Acquisitions - Narrative (Details) $ in Millions	4 Months Ended
	Jun. 30, 2019USD ($)	Mar. 31, 2019solar_generation_facilityMW	Dec. 31, 2018solar_generation_facilitywind_generation_facilityMW
NEP Renewables, LLC [Member]
Business Acquisition [Line Items]
Generation facility capacity (mw)			1,388
Number of solar generation facilities | solar_generation_facility			1
Number of wind generation facilities | wind_generation_facility			10
March 2019 Acquisition [Member] | Scenario, Forecast [Member]
Business Acquisition [Line Items]
Total consideration | $	$ 1,020
Ashtabula Wind II, LLC [Member]
Business Acquisition [Line Items]
Membership interests acquired		100.00%
Generation facility capacity (mw)		120
Garden Wind, LLC [Member]
Business Acquisition [Line Items]
Membership interests acquired		100.00%
Generation facility capacity (mw)		150
White Oak Energy Holdings, LLC [Member]
Business Acquisition [Line Items]
Membership interests acquired		100.00%
White Oak Energy LLC [Member]
Business Acquisition [Line Items]
Membership interests acquired		100.00%
Generation facility capacity (mw)		150
Rosmar Holdings, LLC [Member]
Business Acquisition [Line Items]
Membership interests acquired		100.00%
Rosmar Holdings, LLC [Member] | Marshall And Roswell [Member]
Business Acquisition [Line Items]
Noncontrolling ownership interest		49.99%
Number of solar generation facilities | solar_generation_facility		2
Silver State South Solar, LLC [Member]
Business Acquisition [Line Items]
Membership interests acquired		49.99%
Generation facility capacity (mw)		250

Acquisitions - Supplemental Una

Acquisitions - Supplemental Unaudited Pro forma Results of Operations (Details) - NEP Renewables, LLC [Member] $ in Millions	3 Months Ended
	Mar. 31, 2018USD ($)
Unaudited pro forma results of operations:
Pro forma revenues	$ 242
Pro forma operating income	98
Pro forma net loss	(29)
Pro forma net income attributable to NEP	$ 122

Revenue (Details)

Revenue (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenues over the remaining terms of the related contacts	$ 2,200
Renewable Energy Sales [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue from contract with customer	125	$ 144
Natural Gas Transportation Services [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue from contract with customer	$ 52	$ 55

Income Taxes (Details)

Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Income Tax Contingency [Line Items]
Effective tax rate (as a percent)	5.00%
Tax Cuts and Jobs Act of 2017, income tax expense (benefit)		$ 20
Accounting Standards Update 2017-05 [Member]
Income Tax Contingency [Line Items]
Income (loss) attributable to noncontrolling interest, before tax		$ 231
Canada Revenue Agency [Member]
Income Tax Contingency [Line Items]
Canadian taxes included	100.00%

Fair Value Measurements - Asset

Fair Value Measurements - Assets and Liabilities Measured on a Recurring Basis (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Liabilities:
Restricted cash equivalents	$ 9	$ 9
Recurring Basis [Member]
Assets:
Cash equivalents	14	71
Restricted cash equivalents	10	12
Interest rate contracts	5	24
Total assets	29	107
Liabilities:
Interest rate contracts	217	116
Total liabilities	217	116
Recurring Basis [Member] | Level 1 [Member]
Assets:
Cash equivalents	14	71
Restricted cash equivalents	10	12
Interest rate contracts	0	0
Total assets	24	83
Liabilities:
Interest rate contracts	0	0
Total liabilities	0	0
Recurring Basis [Member] | Level 2 [Member]
Assets:
Cash equivalents	0	0
Restricted cash equivalents	0	0
Interest rate contracts	5	24
Total assets	5	24
Liabilities:
Interest rate contracts	217	116
Total liabilities	$ 217	$ 116

Fair Value Measurements - Carry

Fair Value Measurements - Carrying Value and Fair Value of Other Financial Instruments (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Carrying Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, including current maturities	$ 3,413	$ 3,435
Level 2 [Member] | Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, including current maturities	3,392	3,301
Level 2 [Member] | Valuation, Market Approach [Member] | Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, including current maturities	$ 2,958	$ 2,826

Derivative Instruments and He_3

Derivative Instruments and Hedging Activity - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Interest Rate Swap [Member]
Derivative [Line Items]
Notional amount	$ 9,246		$ 9,256
Interest Rate Contract [Member] | Designated as Hedging Instrument [Member]
Derivative [Line Items]
Net losses included in AOCI expected to be reclassified into interest expense within the next 12 months	(6)
Foreign Currency Contract [Member] | Not Designated as Hedging Instrument [Member]
Derivative [Line Items]
Gains related to foreign currency contract		$ 1
Credit Risk Related Contingent Contracts [Member]
Derivative [Line Items]
Liabilities	$ 196		$ 108

Derivative Instruments and He_4

Derivative Instruments and Hedging Activity - Fair Value of Derivative Instruments Included in Balance Sheets (Details) - Cash Flow Hedges [Member] - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Derivatives, Fair Value [Line Items]
Assets	$ 7	$ 13
Liabilities	219	105
Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Assets	5	7
Other Noncurrent Assets [Member]
Derivatives, Fair Value [Line Items]
Assets	2	6
Other Current Liabilities [Member]
Derivatives, Fair Value [Line Items]
Liabilities	2	1
Derivatives [Member]
Derivatives, Fair Value [Line Items]
Liabilities	217	104
Interest Rate Contract [Member]
Derivatives, Fair Value [Line Items]
Assets	7	13
Liabilities	219	105
Not Designated as Hedging Instrument [Member] | Interest Rate Contract [Member]
Derivatives, Fair Value [Line Items]
Assets	5	24
Liabilities	$ 217	$ 116

Derivative Instruments and He_5

Derivative Instruments and Hedging Activity - Gains (Losses) Related to Cash Flow Hedges (Details) - Interest Rate Contract [Member] - Designated as Hedging Instrument [Member] - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Derivative Instruments, Gain (Loss) [Line Items]
Gains (losses) reclassified from AOCI to interest expense	$ 6
Gains (losses) reclassified from AOCI to interest expense		$ (2)
Interest Expense [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Losses recognized in interest expense	$ (118)	$ (52)

Variable Interest Entities (Det

Variable Interest Entities (Details) $ in Millions	3 Months Ended
	Mar. 31, 2019USD ($)equity_investmentelectric_generation_facilityvariable_interest_entityMWshares	Dec. 31, 2018USD ($)
Variable Interest Entity [Line Items]
Number of entities consolidated | variable_interest_entity	12
Number of wind electric generation facilities owned and operated | electric_generation_facility	20
Property, plant and equipment - net	$ 6,713	$ 6,770
Subsidiaries [Member]
Variable Interest Entity [Line Items]
Number of investments | equity_investment	3
Generation facility capacity (mw) | MW	277
Economic rights percentage	100.00%
NextEra Energy Operating Partners, LP [Member]
Variable Interest Entity [Line Items]
Ownership interests percentage	50.00%
Class B Units, Series 1 [Member] | NextEra Energy Partners, LP [Member] | NextEra Energy Operating Partners, LP [Member]
Variable Interest Entity [Line Items]
Number of units issued (in units) | shares	1,000,000
Class B Units, Series 2 [Member] | NextEra Energy Partners, LP [Member] | NextEra Energy Operating Partners, LP [Member]
Variable Interest Entity [Line Items]
Number of units issued (in units) | shares	1,000,000
Palo Duro WInd Project Holdings, LLC [Member] | Variable Interest Entity, Primary Beneficiary [Member]
Variable Interest Entity [Line Items]
Property, plant and equipment - net	$ 4,895	4,937
Deferral related to differential membership interests	112	132
NEP Renewables, LLC [Member] | Variable Interest Entity, Primary Beneficiary [Member]
Variable Interest Entity [Line Items]
Assets, primarily property, plant and equipment - net	2,319	2,339
Liabilities, primarily long-term debt and asset retirement obligation	$ 92	$ 89
NEP OpCo [Member]
Variable Interest Entity [Line Items]
Limited partner interest percentage	35.60%
Noncontrolling limited partner interest percentage	64.40%

Capitalization - Narrative (Det

Capitalization - Narrative (Details) $ / shares in Units, shares in Millions, $ in Millions	Apr. 22, 2019$ / shares	Mar. 31, 2019USD ($)wind_projectMW	Mar. 31, 2019wind_projectMWshares
Class of Stock [Line Items]
Number of wind projects to be recapitalized | wind_project		4	4
Antidilutive shares (in shares) | shares			19.7
LLC Agreement [Member]
Class of Stock [Line Items]
Period of cash distributions		6 years
LLC Agreement [Member] | First Six Years After Closing [Member]
Class of Stock [Line Items]
Percentage of cash distributions		95.00%
Common Units [Member] | LLC Agreement [Member]
Class of Stock [Line Items]
Right to pay		70.00%
NEP Renewables II Investor [Member] | LLC Agreement [Member]
Class of Stock [Line Items]
Pre-tax return		8.30%
NEP Renewables II Investor [Member] | LLC Agreement [Member] | First Six Years After Closing [Member]
Class of Stock [Line Items]
Percentage of cash distributions		5.00%
NEP Renewables II Investor [Member] | Class B Member Units [Member] | NEP Renewables II, LLC [Member]
Class of Stock [Line Items]
Ownership percentage upon non-exercise of buyout		99.00%	99.00%
NEP Renewables II Investor [Member] | NEP Renewables II, LLC [Member]
Class of Stock [Line Items]
Purchaser's commitment to pay | $		$ 900
NEP Renewables II Investor [Member] | NEP Renewables II, LLC [Member] | Class B Member Units [Member]
Class of Stock [Line Items]
Membership interests acquired		100.00%	100.00%
NEP Renewables II, LLC [Member] | Class A Member Units [Member] | NEP Renewables II, LLC [Member]
Class of Stock [Line Items]
Noncontrolling interest, ownership percentage by parent		100.00%	100.00%
NEP Renewables II, LLC [Member] | Perrin Ranch Wind Energy Center [Member]
Class of Stock [Line Items]
Membership interests acquired		100.00%	100.00%
Generation facility capacity (mw)		99	99
NEP Renewables II, LLC [Member] | Tuscola Bay Wind Energy Center [Member]
Class of Stock [Line Items]
Membership interests acquired		100.00%	100.00%
Generation facility capacity (mw)		120	120
NEP Renewables II, LLC [Member] | Ashtabula Wind III Energy Center [Member]
Class of Stock [Line Items]
Membership interests acquired		100.00%	100.00%
Generation facility capacity (mw)		62	62
NEP Renewables II, LLC [Member] | Stateline Wind Energy Center [Member]
Class of Stock [Line Items]
Membership interests acquired		100.00%	100.00%
Generation facility capacity (mw)		300	300
Subsequent Event [Member]
Class of Stock [Line Items]
Distribution made to limited partner, distributions declared, per unit (in dollars per share) | $ / shares	$ 0.4825

Capitalization - Schedule of Ea

Capitalization - Schedule of Earnings Per Share, Basic and Diluted (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Numerator:
Net income attributable to NEP – basic	$ (22)	$ 74	[1]
Adjustments for convertible notes and preferred units		16
Net income attributable to NEP – assuming dilution		$ 90
Denominator:
Weighted average number of common units outstanding - basic (in shares)	56.1	54.3	[1]
Convertible notes and preferred units (in shares)		19.7
Weighted-average number of common units outstanding – assuming dilution (in shares)	75.8	74	[1]
Earnings per unit attributable to NEP:
Basic (in shares)	$ (0.38)	$ 1.36	[1]
Assuming dilution (in shares)	$ (0.38)	$ 1.22	[1]
[1]	Prior-period financial information has been retrospectively adjusted to include the adoption of an accounting standards update related to leases.

Accumulated Other Comprehensi_3

Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	$ 5,538	$ 2,224	[1]
Total other comprehensive income (loss), net of tax	(5)	1	[1],[2]
Ending balance	5,345	3,583	[1]
Total
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(18)	(127)
Ending balance	(23)	(126)
Net Unrealized Gains (Losses) on Cash Flow Hedges [Member]
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	6	1
Amounts reclassified from AOCI to interest expense	(6)	1
Total other comprehensive income (loss), net of tax	(6)	1
Ending balance	0	2
Net Unrealized Gains (Losses) on Foreign Currency Translation [Member]
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance		(98)
Other comprehensive income (loss)		(4)
Total other comprehensive income (loss), net of tax		(4)
Ending balance		(102)
Other Comprehensive Income (Loss) Related to Equity Method Investee [Member]
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(24)	(30)
Other comprehensive income (loss)	1	4
Total other comprehensive income (loss), net of tax	1	4
Ending balance	(23)	(26)
Total Attributable to Noncontrolling Interest [Member]
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Ending balance	(15)	(127)
Net Unrealized Gains (Losses) on Cash Flow Hedges Attributable to Noncontrolling Interest [Member]
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Ending balance	0	0
Net Unrealized Gains (Losses) on Foreign Currency Translation Attributable to Noncontrolling Interest [Member]
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Ending balance		(99)
Other Comprehensive Income (Loss) Related to Equity Method Investee Attributable to Noncontrolling Interest [Member]
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Ending balance	(15)	(28)
Total Attributable to Parent [Member]
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Ending balance	(8)	1
Net Unrealized Gains (Losses) on Cash Flow Hedges Attributable to Parent [Member]
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Ending balance	0	2
Net Unrealized Gains (Losses) on Foreign Currency Translation Attributable to Parent [Member]
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Ending balance		(3)
Other Comprehensive Income (Loss) Related to Equity Method Investee Attributable to Parent [Member]
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Ending balance	$ (8)	$ 2
[1]	Prior-period financial information has been retrospectively adjusted to include the adoption of an accounting standards update related to leases.
[2]	Prior-period financial information has been retrospectively adjusted to include the adoption of an accounting standards update related to leases.

Related Party Transactions (Det

Related Party Transactions (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018		Dec. 31, 2018
Related Party Transaction [Line Items]
Due from related parties	$ 43			$ 68
Funding of debt payment	24	$ 31	[1]
Revenue from related parties	1	2
Transportation and Fuel Management Agreement [Member]
Related Party Transaction [Line Items]
Revenue from related parties	1	2
NextEra Energy, Inc. [Member] | Management Services Agreement [Member]
Related Party Transaction [Line Items]
Expenses from transactions with related party	22	18
NEER [Member] | Cash Sweep and Credit Support Agreement [Member]
Related Party Transaction [Line Items]
Interest expense	1	$ 1
Due from related parties	$ 42			$ 66
NEP OpCo [Member] | NextEra Energy, Inc. [Member] | Management Services Agreement [Member]
Related Party Transaction [Line Items]
Management fee, percent of EBITDA	1.00%
Annual management fee	$ 4
NEER [Member] | Guarantees [Member]
Related Party Transaction [Line Items]
Related party obligations	69
NextEra Energy Capital Holdings [Member] | Guarantees and Letters of Credit [Member]
Related Party Transaction [Line Items]
Total amount of letters of credit	691
NextEra Energy Capital Holdings [Member] | Genesis Solar Funding, LLC [Member] | Genesis Solar Funding, LLC [Member]
Related Party Transaction [Line Items]
Funding of debt payment	$ 20
[1]	Prior-period financial information has been retrospectively adjusted to include the adoption of an accounting standards update related to leases.

Summary of Significant Accoun_3

Summary of Significant Accounting and Reporting Policies - Narrative (Details) $ in Millions, $ in Millions	Jun. 29, 2018USD ($)	Jun. 30, 2018USD ($)solar_generation_facilitywind_generation_facilityMW	Jun. 30, 2018CAD ($)	Mar. 31, 2019USD ($)	Mar. 31, 2018USD ($)		Dec. 31, 2018USD ($)
Property, Plant and Equipment [Line Items]
Restricted cash, noncurrent				$ 11			$ 11
Income before income taxes				$ (128)	$ 0	[1]
Canadian Holdings [Member]
Property, Plant and Equipment [Line Items]
Income before income taxes					$ 28
Non Affiliated Party [Member]
Property, Plant and Equipment [Line Items]
Noncontrolling ownership interest				10.00%
NEP OpCo [Member]
Property, Plant and Equipment [Line Items]
Noncontrolling ownership interest				64.40%
Canadian Holdings [Member] | Disposal Group, Held-for-sale or Disposed of by Sale, Not Discontinued Operations [Member]
Property, Plant and Equipment [Line Items]
Proceeds from the sale of Canadian Holdings - net	$ 563		$ 740
Post-closing working capital adjustments		$ 1
Assumption of existing debt		$ 676
Number of wind generation facilities | wind_generation_facility		4
Number of solar generation facilities | solar_generation_facility		2
Generation facility capacity (mw) | MW		396
[1]	Prior-period financial information has been retrospectively adjusted to include the adoption of an accounting standards update related to leases.

Summary of Significant Accoun_4

Summary of Significant Accounting and Reporting Policies - Noncontrolling Interests (Details) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2019	Mar. 31, 2018		Jan. 01, 2018
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
Balances, beginning of period		$ 3,192
Related party note receivable	[1]		$ 29
Net income (loss) attributable to NCI		(105)	(99)	[2]
Related party contributions		1
Related party distributions		(51)	(64)	[1]
Changes in non-economic ownership interests		(6)	(6)	[1]
Differential membership interests contributions, net of distributions		24	23	[1]
Payments to NEP OpCo subsidiary investor		(5)
Adoption of accounting standards update	[1]				$ 1,423
Other		1
Balances, end of period		3,048
Net income (loss) attributable to NCI		(105)	(99)	[2]
Net loss attributable to NEP – basic		22	(74)	[2]
Accounting Standards Update 2017-05 [Member]
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
Net income (loss) attributable to NCI			211
Net income (loss) attributable to NCI			211
Income (loss) attributable to noncontrolling interest, before tax			231
Noncontrolling Ownership Interests In NEP OpCo Subsidiary [Member]
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
Balances, beginning of period		751
Net income (loss) attributable to NCI		12
Payments to NEP OpCo subsidiary investor		(5)
Balances, end of period		758
Net income (loss) attributable to NCI		12
Noncontrolling Ownership Interests In NEP OpCo Subsidiary [Member] | NextEra Energy, Inc. [Member]
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
Net income (loss) attributable to NCI		8
Net income (loss) attributable to NCI		8
Noncontrolling Ownership Interests In NEP OpCo Subsidiary [Member] | NextEra Energy Partners, LP [Member]
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
Net income (loss) attributable to NCI		4
Net income (loss) attributable to NCI		4
Differential Membership Interests [Member]
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
Balances, beginning of period		2,019	0
Net income (loss) attributable to NCI		(60)	(269)
Differential membership interests contributions, net of distributions		24	23
Adoption of accounting standards update					1,413
Balances, end of period		1,983	1,167
Net income (loss) attributable to NCI		(60)	(269)
Net loss attributable to NEP – basic		21	94
Differential Membership Interests [Member] | NextEra Energy, Inc. [Member]
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
Net income (loss) attributable to NCI		(39)	(175)
Net income (loss) attributable to NCI		(39)	(175)
Noncontrolling Ownership Interests in NEP OpCo and Texas Pipeline [Member]
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
Balances, beginning of period		422	34
Related party note receivable			29
Net income (loss) attributable to NCI		(57)	170
Other comprehensive loss		(3)	1
Related party contributions		1
Related party distributions		(51)	(64)
Changes in non-economic ownership interests		(6)	(6)
Adoption of accounting standards update					1
Other		1
Balances, end of period		307	165
Net income (loss) attributable to NCI		(57)	170
Non-controlling Interests [Member]
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
Balances, beginning of period		3,192	34
Related party note receivable			29
Net income (loss) attributable to NCI		(105)	(99)
Other comprehensive loss		(3)	1
Related party contributions		1
Related party distributions		(51)	(64)
Changes in non-economic ownership interests		(6)	(6)
Differential membership interests contributions, net of distributions		24	23
Payments to NEP OpCo subsidiary investor		(5)
Adoption of accounting standards update					$ 1,414
Other		1
Balances, end of period		3,048	1,332
Net income (loss) attributable to NCI		$ (105)	$ (99)
[1]	Prior-period financial information has been retrospectively adjusted to include the adoption of an accounting standards update related to leases.
[2]	Prior-period financial information has been retrospectively adjusted to include the adoption of an accounting standards update related to leases.

Commitments and Contingencies (

Commitments and Contingencies (Details) - USD ($)	3 Months Ended
	Mar. 31, 2019	Dec. 31, 2018
Operating Leased Assets [Line Items]
Net income attributable to NEP from PPAs	2.00%
Debt defaulted	$ 669,000,000	$ 682,000,000
Impairment adjustment	0
Cash distributions not made	38,000,000
Current Debt [Member]
Operating Leased Assets [Line Items]
Debt defaulted	641,000,000
Standby Letters of Credit [Member] | Letters of Credit Due June and July 2022 [Member]
Operating Leased Assets [Line Items]
Credit facility, maximum borrowing capacity	82,000,000
Credit facility, amount outstanding	$ 68,000,000

Uncategorized Items - nep-20190

Label	Element	Value	[1]
Limited Partner [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	$ 9,000,000
Noncontrolling Interest [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	$ 1,414,000,000
[1]	Prior-period financial information has been retrospectively adjusted to include the adoption of an accounting standards update related to leases.