NextEra Energy Partners (NEP) 10-Q 23 Oct 19 2019 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information	9 Months Ended
	Sep. 30, 2019shares
Cover page.
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2019
Document Transition Report	false
Entity File Number	1-36518
Entity Registrant Name	NEXTERA ENERGY PARTNERS, LP
Entity Tax Identification Number	30-0818558
Entity Address, Address Line One	700 Universe Boulevard
Entity Address, City or Town	Juno Beach
Entity Address, State or Province	FL
Entity Address, Postal Zip Code	33408
City Area Code	561
Local Phone Number	694-4000
Entity Incorporation, State or Country Code	DE
Title of 12(b) Security	Common units
Trading Symbol	NEP
Security Exchange Name	NYSE
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding	60,823,764
Amendment Flag	false
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q3
Entity Central Index Key	0001603145
Current Fiscal Year End Date	--12-31

Condensed Consolidated Statemen

Condensed Consolidated Statements of Income (Loss) - USD ($) shares in Millions, $ in Millions		3 Months Ended			9 Months Ended
		Sep. 30, 2019	Sep. 30, 2018	[1]	Sep. 30, 2019	Sep. 30, 2018	[1]
OPERATING REVENUES
Renewable energy sales		$ 201	$ 124		$ 494	$ 449
Texas pipelines service revenues		52	54		155	166
Total operating revenues	[2]	253	178		649	615
OPERATING EXPENSES
Operations and maintenance	[3]	90	65		247	190
Depreciation and amortization		68	49		192	152	[4]
Gain on disposal of Canadian Holdings		0	0		0	(153)	[4]
Taxes other than income taxes and other		7	5		20	15
Total operating expenses - net		165	119		459	204
OPERATING INCOME		88	59		190	411
OTHER INCOME (DEDUCTIONS)
Interest expense		(372)	31		(735)	(93)
Equity in earnings of equity method investees		21	23		29	39
Equity in earnings (losses) of non-economic ownership interests		1	11		(10)	25	[4]
Other - net		1	1		3	14
Total other income (deductions) - net		(349)	66		(713)	(15)
INCOME (LOSS) BEFORE INCOME TAXES		(261)	125		(523)	396
INCOME TAX EXPENSE (BENEFIT)		(18)	15		(35)	13
NET INCOME (LOSS)		(243)	110	[5]	(488)	383	[4]
Net income attributable to preferred distributions		(2)	(6)	[6]	(14)	(18)	[6]
Less net income (loss) attributable to noncontrolling interest		173	(71)		380	(176)
NET INCOME (LOSS) ATTRIBUTABLE TO NEXTERA ENERGY PARTNERS, LP		$ (72)	$ 33		$ (122)	$ 189
Weighted average number of common units outstanding - basic (in shares)		59.9	54.9		57.4	54.5
Weighted average number of common units outstanding - assuming dilution (in shares)		75.8	74.6		75.8	74.2
Earnings (loss) per common unit attributable to NextEra Energy Partners, LP - basic (in dollars per share)		$ (1.21)	$ 0.60		$ (2.12)	$ 3.47
Earnings (loss) per common unit attributable to NextEra Energy Partners, LP - assuming dilution (in dollars per share)		$ (1.21)	$ 0.58		$ (2.12)	$ 3.25
[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 $2 million and less than $1 million for the three months ended September 30, 2019 and 2018 , respectively, and $5 million and $3 million for the nine months ended September 30, 2019 and 2018 , respectively.
[3]	Includes O&M expenses related to renewable energy projects of $50 million and $31 million for the three months ended September 30, 2019 and 2018 , respectively, and $135 million and $92 million for the nine months ended September 30, 2019 and 2018 , respectively. Includes O&M expenses related to the Texas pipelines of $12 million and $11 million for the three months ended September 30, 2019 and 2018 , respectively, and $33 million and $33 million for the nine months ended September 30, 2019 and 2018 , respectively. Total O&M expenses presented include related party amounts of $28 million and $18 million for the three months ended September 30, 2019 and 2018 , respectively, and $76 million and $66 million for the nine months ended September 30, 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		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Income Statement [Abstract]
Related party revenues	$ 2	$ 1	$ 5	$ 3
Operations and maintenance related to renewable energy projects	50	31	135	92
Operations and maintenance related to Texas pipelines	12	11	33	33
Operations and maintenance related party	$ 28	$ 18	$ 76	$ 66

Condensed Consolidated Statem_3

Condensed Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Millions	3 Months Ended			9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018		Sep. 30, 2019	Sep. 30, 2018
Statement of Comprehensive Income [Abstract]
NET INCOME (LOSS)	$ (243)	$ 110	[1],[2]	$ (488)	$ 383	[2],[3]
OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX
Reclassification from AOCI to net income (net of $0, $1 tax expense, $0 tax benefit and $2 tax expense, respectively)				(6)
Reclassification from AOCI to net income (net of $0, $1 tax expense, $0 tax benefit and $2 tax expense, respectively)	0	(1)	[4]		1	[4]
Net unrealized losses on foreign currency translation (net of $0, $0, $0 and $1 tax benefit, respectively)	0	0	[4]	0	(6)	[4]
Other comprehensive income related to equity method investees (net of $0 tax expense, $2 tax benefit, $0 tax expense and $2 tax benefit, respectively)	0	9	[4]	1	9	[4]
Total other comprehensive income (loss), net of tax	0	8	[1],[4]	(5)	4	[4]
Impact of disposal of Canadian Holdings (net of $0, $0, $0 and $3 tax expense, respectively)	0	0	[4]	0	107	[4]
COMPREHENSIVE INCOME (LOSS)	(243)	118	[4]	(493)	494	[4]
Net income attributable to preferred distributions	(2)	(6)	[2],[4]	(14)	(18)	[2],[4]
Less comprehensive income (loss) attributable to noncontrolling interest	173	(86)	[4]	384	(293)	[4]
COMPREHENSIVE INCOME (LOSS) ATTRIBUTABLE TO NEXTERA ENERGY PARTNERS, LP	$ (72)	$ 26	[4]	$ (123)	$ 183	[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			9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	[1]	Sep. 30, 2019	Sep. 30, 2018	[1]
Statement of Comprehensive Income [Abstract]
Reclassification from AOCI to net income, tax				$ 0
Reclassification from AOCI to net income, tax	$ 0	$ (1)			$ 2
Unrealized gains (losses) on foreign currency translation, tax	0	0		0	(1)
Other comprehensive income (loss) related to equity method investee, tax (benefit) expense	0	(2)		0	(2)
Impact of disposal of Canadian Holdings, tax expense	$ 0	$ 0		$ 0	$ 3
[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 ($)	Sep. 30, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 195,000,000	$ 147,000,000
Accounts receivable	102,000,000	63,000,000
Other receivables	169,000,000	17,000,000
Due from related parties	527,000,000	68,000,000
Other current assets	39,000,000	45,000,000
Total current assets	1,032,000,000	340,000,000
Non-current assets:
Property, plant and equipment - net	6,982,000,000	6,770,000,000
Goodwill	609,000,000	584,000,000
Investments in equity method investees	350,000,000	214,000,000
Deferred income taxes	160,000,000	108,000,000
Other non-current assets	150,000,000	128,000,000
Total non-current assets	10,563,000,000	9,065,000,000
TOTAL ASSETS	11,595,000,000	9,405,000,000
Current liabilities:
Accounts payable and accrued expenses	113,000,000	10,000,000
Due to related parties	58,000,000	45,000,000
Current portion of long-term debt	379,000,000	707,000,000
Accrued interest	19,000,000	31,000,000
Accrued property taxes	18,000,000	19,000,000
Other current liabilities	58,000,000	47,000,000
Total current liabilities	645,000,000	859,000,000
Non-current liabilities:
Long-term debt	3,719,000,000	2,728,000,000
Asset retirement obligation	138,000,000	95,000,000
Derivatives	679,000,000	104,000,000
Non-current due to related party	68,000,000	34,000,000
Other non-current liabilities	170,000,000	47,000,000
Total non-current liabilities	4,774,000,000	3,008,000,000
TOTAL LIABILITIES	5,419,000,000	3,867,000,000
COMMITMENTS AND CONTINGENCIES
EQUITY
Preferred units (9.3 and 14.0 units issued and outstanding, respectively)	365,000,000	548,000,000
Common units (60.8 and 56.1 units issued and outstanding, respectively)	1,803,000,000	1,804,000,000
Accumulated other comprehensive loss	(8,000,000)	(6,000,000)
Noncontrolling interests	4,016,000,000	3,192,000,000
TOTAL EQUITY	6,176,000,000	5,538,000,000
TOTAL LIABILITIES AND EQUITY	11,595,000,000	9,405,000,000
Deferred income taxes
Non-current assets:
Intangible assets	631,000,000	644,000,000
Intangible assets – PPAs - net
Non-current assets:
Intangible assets	$ 1,681,000,000	$ 617,000,000

Condensed Consolidated Balanc_2

Condensed Consolidated Balance Sheets (Parenthetical) - shares shares in Millions	Sep. 30, 2019	Dec. 31, 2018
Statement of Financial Position [Abstract]
Preferred units issued (in shares)	9.3	14
Preferred units outstanding (in shares)	9.3	14
Common units issued (in shares)	60.8	56.1
Common units outstanding (in shares)	60.8	56.1

Condensed Consolidated Statem_5

Condensed Consolidated Statements of Cash Flows - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	[2]
CASH FLOWS FROM OPERATING ACTIVITIES
Net income (loss)	$ (488)	$ 383	[1]
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	192	152	[1]
Intangible amortization - PPA	46	0
Change in value of derivative contracts	589	(51)
Deferred income taxes	(35)	23
Equity in earnings of equity method investees, net of distributions received	(27)	(11)
Equity in losses (earnings) of non-economic ownership interests	10	(25)	[1]
Gain on disposal of Canadian Holdings	0	(153)	[1]
Other - net	28	(3)
Changes in operating assets and liabilities:
Other current assets	(34)	(5)
Other non-current assets	(2)	3
Other current liabilities	(25)	(48)
Other non-current liabilities	(2)	4
Net cash provided by operating activities	252	269
CASH FLOWS FROM INVESTING ACTIVITIES
Acquisition of membership interests in subsidiaries - net	(1,028)	0
Capital expenditures	(39)	(10)
Proceeds from the sale of Canadian Holdings - net	0	517
Payments to related parties under CSCS agreement - net	(459)	(720)
Other	7	0
Net cash used in investing activities	(1,519)	(213)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from issuance of common units - net	3	81
Issuances of long-term debt	1,650	0
Retirements of long-term debt	(1,001)	(74)
Debt issuance costs	(18)	0
Partner contributions	2	32
Partner distributions	(259)	(205)
Preferred unit distributions	(17)	(15)
Proceeds from differential membership investors	66	56
Payments to differential membership investors	(22)	(16)
Payments to Class B noncontrolling interests investors	(15)	0
Proceeds on sale of Class B noncontrolling interest - net	893	0
Change in amounts due to related parties	29	(1)
Net cash provided by (used in) financing activities	1,311	(142)
Effect of exchange rate changes on cash, cash equivalents and restricted cash	0	(2)
NET INCREASE (DECREASE) IN CASH, CASH EQUIVALENTS AND RESTRICTED CASH	44	(88)
CASH, CASH EQUIVALENTS AND RESTRICTED CASH - BEGINNING OF PERIOD	166	198
CASH, CASH EQUIVALENTS AND RESTRICTED CASH - END OF PERIOD	210	110
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION:
Partner noncash distributions	3	17
Partner noncash contributions	11	0
Change in noncash investments in equity method investees - net	12	1
Accrued but not paid for capital and other expenditures	4	1
Accrued preferred distributions	$ 4	$ 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.

Condensed Consolidated Statem_6

Condensed Consolidated Statements of Changes in Equity shares in Thousands, $ in Millions		USD ($)$ / sharesshares		Series A Convertible Preferred Units [Member]shares	Preferred Units [Member]shares	Preferred Partner [Member]USD ($)shares	Units [Member]USD ($)shares	Limited Partners [Member]USD ($)		Accumulated Other Comprehensive Income (Loss) [Member]USD ($)	Non-controlling Interests [Member]USD ($)		Common Stock [Member]$ / shares
Beginning balance, units at Dec. 31, 2017 | shares					14,000		54,300
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 (loss)		(19)	[1]			6		74	[1]		(99)	[1]
Other comprehensive income (loss)	[1]	1									1
Related party distributions	[1]	(64)									(64)
Other differential membership interests activity	[1]	23									23
Changes in non-economic ownership interests	[1]	(6)									(6)
Distributions to unitholders	[2]	(28)	[1]			(6)		(22)	[1]
Ending balance, units at Mar. 31, 2018 | shares					14,000		54,300
Ending balance at Mar. 31, 2018		$ 3,583	[1]			548		1,702	[1]	1	1,332	[1]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Distributions per common unit (usd per share) | $ / shares		$ 0.4050
Beginning balance, units at Dec. 31, 2017 | shares					14,000		54,300
Beginning balance at Dec. 31, 2017		$ 2,224	[1]			548		1,641	[1]	1	34	[1]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	[3],[4]	383
Other comprehensive income (loss)	[5]	4
Ending balance, units at Sep. 30, 2018 | shares					14,000		56,000
Ending balance at Sep. 30, 2018		4,046	[1]			548		1,847	[1]	(5)	1,656	[1]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accrued preferred distributions	[4]	6
Beginning balance, units at Mar. 31, 2018 | shares					14,000		54,300
Beginning balance at Mar. 31, 2018		3,583	[1]			548		1,702	[1]	1	1,332	[1]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Related party note receivable	[1]	2									2
Net income (loss)		292	[1]			6		82	[1]		204	[1]
Other comprehensive income (loss)	[1]	(5)								(1)	(4)
Related party distributions	[1]	(41)									(41)
Other differential membership interests activity	[1]	(6)									(6)
Changes in non-economic ownership interests	[1]	1									1
Distributions to unitholders	[2]	(29)	[1]			(6)		(23)	[1]
Disposal of Canadian Holdings		107	[1]							2	105
Ending balance, units at Jun. 30, 2018 | shares					14,000		54,300
Ending balance at Jun. 30, 2018		$ 3,904	[1]			$ 548		1,759	[1]	2	1,595	[1]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Distributions per common unit (usd per share) | $ / shares		$ 0.4200
Partners' Capital Account, Distributions		$ (2)						(2)
Issuance of common units (in units) | shares	[6]				0	0	(1,700)
Issuance of common units - net	[6]	81						81
Net income (loss)		110	[1],[3]			$ 6		33	[1]		71	[1]
Other comprehensive income (loss)	[1]	8	[5]							(7)	15
Related party contributions		1									1
Related party distributions		(48)									(48)
Other differential membership interests activity	[1]	23									23
Changes in non-economic ownership interests	[1]	(1)									(1)
Distributions to unitholders	[2]	(30)	[1]			(6)		(24)	[1]
Ending balance, units at Sep. 30, 2018 | shares					14,000		56,000
Ending balance at Sep. 30, 2018		$ 4,046	[1]			548		1,847	[1]	(5)	1,656	[1]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Distributions per common unit (usd per share) | $ / shares		$ 0.4375
Beginning balance, units at Dec. 31, 2018 | shares		56,100			14,000		56,100
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) | shares							(100)
Issuance of common units - net		1						1
Net income (loss)		(121)				6		(22)			(105)
Other comprehensive income (loss)		(5)								(2)	(3)
Related party contributions		1									1
Related party distributions		(51)									(51)
Other differential membership interests activity		24									24
Changes in non-economic ownership interests		(6)									(6)
Payments to Class B noncontrolling interests investors		(5)									(5)
Distributions to unitholders	[7]	(32)				(6)		(26)
Other		1									1
Ending balance, units at Mar. 31, 2019 | shares					14,000		56,200
Ending balance at Mar. 31, 2019		$ 5,345				548		1,757		(8)	3,048
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Distributions per common unit (usd per share) | $ / shares													$ 0.4650
Beginning balance, units at Dec. 31, 2018 | shares		56,100			14,000		56,100
Beginning balance at Dec. 31, 2018		$ 5,538				548		1,804		(6)	3,192
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)		(488)
Other comprehensive income (loss)		$ (5)
Ending balance, units at Sep. 30, 2019 | shares		60,800			9,300		60,800
Ending balance at Sep. 30, 2019		$ 6,176				365		1,803		(8)	4,016
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accrued preferred distributions		4
Beginning balance, units at Mar. 31, 2019 | shares					14,000		56,200
Beginning balance at Mar. 31, 2019		5,345				548		1,757		(8)	3,048
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common units - net		1						1
Changes in non-economic ownership interests		472									472
Related party note receivable		1									1
Net income (loss)		(124)				6		(28)			(102)
Other comprehensive income (loss)		0
Related party contributions		11									11
Related party distributions		(56)									(56)
Other differential membership interests activity		(8)									(8)
Payments to Class B noncontrolling interests investors		(3)									(3)
Distributions to unitholders	[7]	(33)				(6)		(27)
Sale of Class B noncontrolling interest - net		893									893
Other		1						1
Ending balance, units at Jun. 30, 2019 | shares					14,000		56,200
Ending balance at Jun. 30, 2019		6,500				$ 548		1,704		(8)	4,256
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Distributions per common unit (usd per share) | $ / shares													0.4825
Partners' Capital Account, Contributions								20
Issuance of common units (in units) | shares	[6]				(4,700)	(183,000)	(4,700)
Issuance of common units - net	[6]	20						203
Changes in non-economic ownership interests		11						1			10
Net income (loss)		(243)				$ 2		(72)			(173)
Other comprehensive income (loss)		0
Related party distributions		(71)									(71)
Other differential membership interests activity		27									27
Changes in non-economic ownership interests		(6)									(6)
Payments to Class B noncontrolling interests investors		(7)									(7)
Distributions to unitholders	[7]	(33)				(2)		(31)
Other		$ 0					$ (0.1)	0
Ending balance, units at Sep. 30, 2019 | shares		60,800			9,300		60,800
Ending balance at Sep. 30, 2019		$ 6,176				$ 365		$ 1,803		$ (8)	$ 4,016
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Distributions per common unit (usd per share) | $ / shares													$ 0.5025
Conversion of stock, shares converted (in shares) | shares				4,670
Conversion ratio				1
[1]	Prior-period financial information has been retrospectively adjusted to include the adoption of an accounting standards update related to leases.
[2]	Distributions per common unit of $0.4375 , $0.4200 and $0.4050 were paid during the three months ended September 30, 2018 , June 30, 2018 and March 31, 2018, respectively.
[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]	Prior-period financial information has been retrospectively adjusted to include the adoption of an accounting standards update related to leases.
[6]	During the three months ended September 30, 2019 , NEP converted approximately 4.67 million Series A convertible preferred units into NEP common units on a one -for-one basis and recognized a deferred tax asset of $20 million related to the issuance of NEP common units.
[7]	Distributions per common unit of $0.5025 , $0.4825 and $0.4650 were paid during the three months ended September 30, 2019 , June 30, 2019 and March 31, 2019, respectively. At September 30, 2019 , $4 million of preferred unit distributions were accrued and are payable in November 2019.

Acquisitions

Acquisitions	9 Months Ended
	Sep. 30, 2019
Business Combinations [Abstract]
Acquisitions	Acquisitions In June 2019, an indirect subsidiary of NEP completed the acquisition from NEER (June 2019 acquisition) of the following: • 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 owns 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 (Rosmar), 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 (Silver State), which indirectly owns a 250 MW solar generation facility located in Nevada. NEER retained ownership interests in Rosmar and Silver State and remains the managing member of Rosmar. Thus, NEP's interest in Rosmar is reflected within investments in equity method investees on the condensed consolidated balance sheets. NEER's remaining interest in Silver State is reflected within noncontrolling interests on the condensed consolidated balance sheets (see Note 10 - Noncontrolling Interests). The purchase price included approximately $1,020 million in cash consideration, plus working capital of $12 million . Under the acquisition method, the purchase price was allocated to the assets acquired and liabilities assumed on June 11, 2019 based on their estimated fair value. All fair value measurements of assets acquired and liabilities assumed were based on significant estimates and assumptions, including Level 3 (unobservable) inputs, which require judgment. Estimates and assumptions include the projected timing and amount of future cash flows, discount rates reflecting risk inherent in future cash flows and future market prices. The following table summarizes the preliminary amounts recognized by NEP for the estimated fair value of assets acquired and liabilities assumed in the June 2019 acquisition: As of June 11, 2019 (millions) Total consideration transferred $ 1,032 Identifiable assets acquired and liabilities assumed Cash $ 4 Accounts receivable, other receivables and prepaid expenses 159 Property, plant and equipment – net 400 Intangible assets – PPAs 1,080 Goodwill 14 Other non-current assets 133 Accounts payable, accrued expenses and other current liabilities (132 ) Other non-current liabilities (154 ) Noncontrolling interest (472 ) Total net identifiable assets, at fair value (a) $ 1,032 ______________________ (a) Includes a right of use asset of approximately $20 million and operating lease liabilities of approximately $21 million primarily related to a land use agreement that conveys exclusive use of the land for one of the acquired projects, which were calculated based on a discount rate of 4.57% based on the incremental borrowing rate and a remaining lease term of approximately 26 years as of the date of acquisition. At September 30, 2019, NEP expects to make fixed lease payments of approximately $2 million annually over the next five years and $25 million thereafter. During the three and nine months ended September 30, 2019 , NEP recorded adjustments to the preliminary purchase price allocation based on a final valuation report which increased intangible assets - PPAs, goodwill and other non-current liabilities by approximately $30 million , $11 million , and $1 million , respectively, and decreased property, plant and equipment - net and noncontrolling interests by $50 million and $10 million , respectively. Intangible assets - PPAs are amortized into operating revenues on a straight-line basis over the remaining contract terms of the related PPAs. At September 30, 2019, annual amortization of the intangible assets - PPAs is expected to be approximately $39 million in 2019 and $ 70 million in each of the next four years. On September 29, 2019, Meade Pipeline Investment, LLC (the Meade purchaser), an indirect subsidiary of NEP, entered into a purchase and sale agreement to acquire all of the ownership interests in Meade Pipeline Co LLC (Meade) for the initial cash consideration of $1.28 billion , subject to working capital and other customary purchase price adjustments, plus estimated future capital contributions of approximately $90 million that are related to the expansion project discussed below. Meade owns a 39.2% ownership interest in the Central Penn Line (CPL), a 185 -mile natural gas pipeline that operates in Pennsylvania with capacity to transport and deliver up to approximately 1.7 billion cubic feet (Bcf) of natural gas per day. Meade also owns a 40% ownership interest in an expansion project (the expansion) that is expected to add an estimated 0.6 Bcf per day of natural gas capacity to CPL through the addition of compression at new and existing stations scheduled for commercial operation by mid-2022, subject to receipt of certain regulatory approvals. NEP expects to complete the acquisition of Meade in the fourth quarter of 2019, subject to customary closing conditions and the receipt of certain regulatory approvals. In December 2018, a subsidiary of NEP completed the acquisition from NEER of NEP Renewables, LLC (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 Nine Months Ended (millions) Unaudited pro forma results of operations: Pro forma revenues $ 201 $ 701 Pro forma operating income $ 58 $ 425 Pro forma net income $ 109 $ 378 Pro forma net income attributable to NEP $ 33 $ 244 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	9 Months Ended
	Sep. 30, 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. NEP's operating revenues from contracts with customers are partly offset by the amortization of intangible assets - PPAs. 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 September 30, 2019 is approximately $213 million and $52 million , for the nine months ended September 30, 2019 is $513 million and $155 million , for the three months ended September 30, 2018 is $121 million and $52 million , and for the nine months ended September 30, 2018 is $418 million and $162 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 2020 to 2035. At September 30, 2019 , NEP expects to record approximately $2.1 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. At September 30, 2019 , NEP expects to record approximately $215 million of revenues related to the fixed price components of one PPA through 2039 as the energy is delivered.

Income Taxes

Income Taxes	9 Months Ended
	Sep. 30, 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). NEP recognizes in income its applicable ownership share of U.S. income taxes due to the disregarded tax status of substantially all of the U.S. projects under NEP OpCo. Prior to the sale of Canadian Holdings in June 2018, NEP's former Canadian subsidiaries were all Canadian taxpayers, and therefore NEP recognized in income all of the Canadian taxes. Net income or loss attributable to noncontrolling interests includes minimal U.S. taxes and NEER's applicable ownership share of Canadian taxes. The effective tax rate for the three and nine months ended September 30, 2019 was approximately 7% and 7% , respectively, and was primarily affected by taxes attributable to the noncontrolling interests of approximately $38 million and $80 million , respectively. During the three and nine months ended September 30, 2018 , the effective tax rate was approximately 12% and 3% , respectively. During the nine months ended September 30, 2018 , the disposal of Canadian Holdings (see Note 10 - Disposal of Canadian Holdings) resulted in an overall tax benefit of approximately $47 million . The benefit resulted from the removal of the historical Canadian deferred tax liabilities of approximately $69 million offset by U.S. tax expense of $22 million related to the gain. During the nine months ended September 30, 2018 , 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	9 Months Ended
	Sep. 30, 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, other current assets 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: September 30, 2019 December 31, 2018 Level 1 Level 2 Total Level 1 Level 2 Total (millions) Assets: Cash equivalents $ 82 $ — $ 82 $ 71 $ — $ 71 Restricted cash equivalents (a) 10 — 10 12 — 12 Interest rate contracts — 13 13 — 24 24 Total assets $ 92 $ 13 $ 105 $ 83 $ 24 $ 107 Liabilities: Interest rate contracts $ — $ 698 $ 698 $ — $ 116 $ 116 Total liabilities $ — $ 698 $ 698 $ — $ 116 $ 116 ____________________ (a) At September 30, 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: September 30, 2019 December 31, 2018 Carrying Value Fair Value Carrying Value Fair Value (millions) Long-term debt, including current maturities (a) $ 4,098 $ 4,239 $ 3,435 $ 3,301 ____________________ (a) At September 30, 2019 and December 31, 2018 , approximately $4,041 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	9 Months Ended
	Sep. 30, 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 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). At September 30, 2019 and December 31, 2018 , the net notional amounts of the interest rate contracts were approximately $6,839 million and $7,056 million , respectively. During the nine months ended September 30, 2019 , NEP reclassified approximately $6 million from AOCI to interest expense primarily because the related future transactions being hedged were no longer going to occur. At September 30, 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 and nine months ended September 30, 2018 , NEP recorded less than $1 million of losses and approximately $13 million of gains, respectively, 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 September 30, 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. September 30, 2019 Gross Basis Net Basis Assets Liabilities Assets Liabilities (millions) Interest rate contracts $ 13 $ 698 $ — $ 685 Net fair value by balance sheet line item: Other current assets $ — Other non-current assets — Other current liabilities $ 6 Derivatives 679 Total derivatives $ — $ 685 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 September 30, Nine Months Ended September 30, 2019 2018 2019 2018 (millions) Interest rate contracts: Gains (losses) reclassified from AOCI to interest expense $ — $ — $ 5 $ (3 ) Gains (losses) recognized in interest expense $ (311 ) $ 74 $ (589 ) $ 55 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 September 30, 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 $640 million and $108 million , respectively.

Variable Interest Entities

Variable Interest Entities	9 Months Ended
	Sep. 30, 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 September 30, 2019 , NEP owned an approximately 37.5% limited partner interest in NEP OpCo and NEE Equity owned a noncontrolling 62.5% 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 September 30, 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 $4,850 million and $120 million , respectively, at September 30, 2019 and $4,937 million and $132 million , respectively, at December 31, 2018 . At September 30, 2019 , NEP OpCo also consolidated a VIE related to a Class B noncontrolling interest in NEP Renewables. This entity is considered a VIE because the holder of the Class B noncontrolling 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 $2,281 million and $94 million , respectively, at September 30, 2019 and $2,339 million and $89 million , respectively, at December 31, 2018 . Substantially all of the indirect subsidiaries of NEP Renewables have sold differential membership interests and are also included in the disclosure of the VIEs related to differential membership interests. At September 30, 2019 , NEP OpCo also consolidated a VIE related to the June 2019 sale of a Class B noncontrolling interest in NEP Renewables II. This entity is considered a VIE because the holder of the Class B noncontrolling interest does not have substantive rights over the significant activities of the entity. The assets, primarily intangible assets - PPA and property, plant and equipment - net and liabilities, primarily other long-term liabilities and asset retirement obligation, of the VIE totaled approximately $2,207 million and $326 million , respectively, at September 30, 2019 . NEP Renewables II includes two VIEs related to Rosmar and Silver State. See Note 1 and Note 7 - Equity. 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 September 30, 2019 and December 31, 2018 , NEP's equity method investment related to the non-economic ownership interests of approximately $11 million and $20 million , respectively, is reflected as other non-current assets and, at September 30, 2019 , $13 million is reflected as other non-current liabilities 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	9 Months Ended
	Sep. 30, 2019
Equity [Abstract]
Capitalization	Capitalization Debt - Significant long-term debt issuances and borrowings by subsidiaries of NEP during the nine months ended September 30, 2019 were as follows: Date Issued/Borrowed Debt Issuances/Borrowings Interest Rate Principal Amount Maturity Date (millions) May 2019 - June 2019 NEP OpCo senior secured revolving credit facility Variable (a) $ 450 (b)(c) 2024 June 2019 NEP OpCo senior unsecured notes 4.25% $ 700 (c) 2024 September 2019 NEP OpCo senior unsecured notes 3.875% $ 500 2026 ———————————— (a) Variable rate is based on an underlying index plus a margin. (b) Approximately $214 million of the funds drawn on the revolving credit facility was used to repay in full the outstanding indebtedness of certain projects under their respective limited-recourse financing agreements. During the three and nine months ended September 30, 2019 , approximately $6 million of debt issuance costs were amortized related to the repayment of the project debt. (c) In July 2019, the $450 million outstanding balance under the revolving credit facility was repaid with proceeds from the issuance of the June senior unsecured notes. See additional discussion below. On May 3, 2019, NEP OpCo and its direct subsidiary (loan parties) entered into an amendment of their existing revolving credit facility. The amendments to the revolving credit facility include, among other things, the following: • an increase in the revolving credit facility size from $750 million to $1,250 million , • an extension of the maturity from October 2022 to February 2024, and • a reduction, at certain levels, of the applicable margin payable over the applicable interest rate. On June 27, 2019, NEP OpCo issued $700 million in aggregate principal amount of 4.25% senior unsecured notes due July 2024 (the June 2019 notes). The June 2019 notes are unsecured obligations of NEP OpCo and are absolutely and unconditionally guaranteed, on a senior unsecured basis, by NEP and a subsidiary of NEP OpCo. At any time prior to April 15, 2024, NEP OpCo may redeem some or all of the June 2019 notes at a redemption price equal to 100% of the principal amount of the notes redeemed plus a make-whole premium and accrued and unpaid interest. On or after April 15, 2024, NEP OpCo may redeem some or all of the June 2019 notes at a redemption price equal to 100% of the principal amount of the notes redeemed plus accrued and unpaid interest. On September 23, 2019, NEP OpCo issued $500 million in aggregate principal amount of 3.875% senior unsecured notes due October 2026 (the September 2019 notes). The September 2019 notes are unsecured obligations of NEP OpCo and are absolutely and unconditionally guaranteed, on a senior unsecured basis, by NEP and a subsidiary of NEP OpCo. At any time prior to July 15, 2026, NEP OpCo may redeem some or all of the September 2019 notes at a redemption price equal to 100% of the principal amount of the notes redeemed plus a make-whole premium and accrued and unpaid interest. On or after July 15, 2026, NEP OpCo may redeem some or all of the September 2019 notes at a redemption price equal to 100% of the principal amount of the notes redeemed plus accrued and unpaid interest. During the nine months ended September 30, 2019, approximately $236 million and $39 million principal amount of the Genesis HoldCo notes and the Genesis OpCo debt, respectively, were purchased. See Note 11 - PG&E Bankruptcy. On September 29, 2019, the Meade purchaser and Meade Pipeline Investment Holdings, LLC (Meade Holdings) entered into a credit agreement to finance a portion of the Meade acquisition and the expansion (see Note 1). Meade Holdings is an indirect subsidiary of NEP and the direct parent of the Meade purchaser. The credit agreement provides up to $918 million under three limited-recourse senior secured variable rate term loans (term loans) maturing in 2026. NEP expects to borrow, subject to the conditions specified in the credit agreement, approximately $820 million simultaneously with the closing of the Meade acquisition and the remaining amount available under the credit agreement regularly through the completion of the expansion. Interest on each of the term loans is based on an index plus a specified margin applicable to each such term loan. Under the credit agreement, the Meade purchaser is required to hedge against interest rate movements with respect to the interest payments on the principal amounts of the term loans. The term loans are secured by all of the assets of, and the equity interests in, the Meade purchaser and its subsidiaries. The credit agreement contains default and related acceleration provisions relating to the failure to make required payments or to observe other covenants in the credit agreement and related documents. All borrowings under the term loans are guaranteed by Meade Holdings and by the subsidiaries of the Meade purchaser. NEP OpCo and its subsidiaries' secured long-term debt agreements are secured by liens on certain assets and contain provisions which, under certain conditions, could restrict the payment of distributions or related party fee payments. At September 30, 2019 , NEP and its subsidiaries were in compliance with all financial debt covenants under their financings except as discussed in Note 11 - PG&E Bankruptcy. Equity - On October 21, 2019 , the board of directors of NEP authorized a distribution of $ 0.5175 per common unit payable on November 14, 2019 to its common unitholders of record on November 6, 2019 . On July 19, 2019, NEP converted approximately 4.67 million Series A convertible preferred units into NEP common units on a one -for-one basis. On June 11, 2019, NEP issued and sold 100% of the noncontrolling Class B membership interest in NEP Renewables II, LLC (NEP Renewables II) for approximately $900 million , under a membership interest purchase agreement dated as of March 4, 2019 between NEP, two of its indirect subsidiaries, NEP Renewables Holdings II, LLC (NEP Renewables Holdings II) and NEP Renewables II, and a third-party investor (NEP Renewables II investor). NEP Renewables Holdings II retained 100% of the Class A membership interest in NEP Renewables II, which includes the ownership interests acquired in the June 2019 acquisition 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. NEP Renewables Holdings II retained a controlling interest in NEP Renewables II and therefore NEP presents the Class B interest as noncontrolling interests (see Note 10 - Noncontrolling Interests). Noncontrolling interests represents the portion of net assets in consolidated entities that are not owned by NEP and are reported as a component of equity in NEP’s consolidated balance sheet. NEP has determined the allocation of economics between NEP Renewables Holdings II and the NEP Renewables II investor should not follow the ownership percentages for NEP Renewables II but rather the HLBV method based on the governing provisions in the related limited liability company agreement. Under the HLBV method, the amounts of income and loss attributable to the noncontrolling interests reflects changes in the amount the owners would receive at each balance sheet date under the liquidation provisions, assuming the net assets of these entities were liquidated at the recorded amounts, after taking into account any capital transactions, such as contributions and distributions, between the entity and the owners. Under the amended and restated limited liability company agreement for NEP Renewables II (the LLC agreement), 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 Class B membership interest in NEP Renewables II 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. After June 11, 2025, if NEP has not exercised its entire buyout right, or after December 11, 2023, 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% . The NEP Renewables II investor has certain rights, beginning January 1, 2025, to require NEP, under certain circumstances, to initiate underwritten offerings for the units that may be issuable if NEP exercises the buyout right. Following any exercise of the buyout right, the NEP non-voting common units will have, among other terms, the right to receive pro rata quarterly cash distributions and the right to convert, subject to certain limitations, the NEP non-voting common units into NEP common units on a one-for-one basis. On September 29, 2019, NEP, NextEra Energy Partners Pipelines Holdings, LLC (NEP Pipelines Holdings) and NextEra Energy Partners Pipelines, LLC (NEP Pipelines) entered into a membership interest purchase agreement (membership purchase agreement) with a third-party investor (the NEP Pipelines Class B purchaser) for the purpose of financing a portion of the acquisition of Meade (see Note 1). The NEP Pipelines Class B purchaser has committed to pay $168 million to NEP Pipelines for 100% of the noncontrolling Class B interests in NEP Pipelines, subject to conditions specified in the membership purchase agreement. NEP Pipelines Holdings will hold 100% of the Class A interests and NEP will consolidate NEP Pipelines which will be considered a VIE because the NEP Pipelines Class B purchaser does not have substantive rights over the significant activities of Meade. Under the amended and restated limited liability company agreement of NEP Pipelines that will be entered into at closing, NEP, through its indirect ownership of NEP Pipelines Holdings, will receive approximately 99% of NEP Pipelines' cash distributions for the first six years after closing, and the NEP Pipelines Class B purchaser will receive approximately 1% . From the third and one half to the sixth and one half anniversary of the closing, NEP has the option (the NEP Pipelines buyout right), subject to certain limitations, to purchase the NEP Pipelines Class B purchaser’s interest in NEP Pipelines at a buyout price that implies a fixed pre-tax annual levered return of approximately 11% to the NEP Pipelines Class B purchaser (inclusive of all prior distributions). If exercised, subject to certain terms and conditions, NEP has the right to pay up to 100% of the buyout price in NEP non-voting common units, issued at the then-current market price of NEP common units. Following the sixth anniversary after closing, if NEP has not exercised its entire buyout right, or following the fifth anniversary after closing if certain minimum buyouts have not occurred, the NEP Pipelines Class B purchaser’s allocation of distributable cash flow from the portfolio for the portion of the Class B membership interests that have not been purchased by NEP would increase to 99% . NEP will give the NEP Pipelines Class B purchaser, under a registration rights agreement to be entered into at closing, certain rights to require NEP to file a shelf registration for the common units that are issuable if NEP exercises the buyout right. 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. Due to the net losses incurred during the three and nine months ended September 30, 2019 , the weighted-average number of common units issuable pursuant to the convertible notes and preferred units totaling approximately 15.9 million and 18.4 million , respectively, were not included in the calculation of diluted earnings per unit due to their antidilutive effect. The reconciliation of NEP's basic and diluted earnings per unit for the three and nine months ended September 30, 2018 is as follows: Three Months Ended September 30, 2018 Nine Months Ended September 30, 2018 (millions, except per unit amounts) Numerator: Net income attributable to NEP – basic $ 33 $ 189 Adjustments for convertible notes and preferred units 10 52 Net income attributable to NEP – assuming dilution $ 43 $ 241 Denominator: Weighted-average number of common units outstanding – basic 54.9 54.5 Convertible notes and preferred units 19.7 19.7 Weighted-average number of common units outstanding – assuming dilution 74.6 74.2 Earnings per unit attributable to NEP: Basic $ 0.60 $ 3.47 Assuming dilution $ 0.58 $ 3.25

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income (Loss)	9 Months Ended
	Sep. 30, 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 Investees Total (millions) Balances, December 31, 2018 $ 6 $ (24 ) $ (18 ) Amounts reclassified from AOCI to interest expense (6 ) — (6 ) Other comprehensive income related to equity method investees — 1 1 Net other comprehensive income (loss) (6 ) 1 (5 ) Balances, March 31, 2019 — (23 ) (23 ) Net other comprehensive income (loss) — — — Balances, June 30, 2019 — (23 ) (23 ) Net other comprehensive income (loss) — — — Balances, September 30, 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) 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 ) Amounts reclassified from AOCI to interest expense 1 — — 1 Net unrealized losses on foreign currency translation — (2 ) — (2 ) Other comprehensive income related to equity method investee — — (4 ) (4 ) Net other comprehensive income (loss) 1 (2 ) (4 ) (5 ) Impact of disposal of Canadian Holdings 3 104 — 107 Balances, June 30, 2018 6 — (30 ) (24 ) Amounts reclassified from AOCI to interest expense (1 ) — — (1 ) Other comprehensive income related to equity method investee — — 9 9 Net other comprehensive income (loss) (1 ) — 9 8 Balances, September 30, 2018 $ 5 $ — $ (21 ) $ (16 ) AOCI attributable to noncontrolling interest $ 4 $ — $ (15 ) $ (11 ) AOCI attributable to NEP $ 1 $ — $ (6 ) $ (5 )

Related Party Transactions

Related Party Transactions	9 Months Ended
	Sep. 30, 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 and nine months ended September 30, 2019 include approximately $24 million and $68 million , respectively, and for the three and nine months ended September 30, 2018 include $20 million and $57 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 and nine months ended September 30, 2019 include approximately $1 million and $4 million , respectively, and for the three and nine months ended September 30, 2018 include $1 million and $3 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 September 30, 2019 and December 31, 2018 , the cash sweep amounts held in accounts belonging to NEER or its affiliates were approximately $525 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 surety 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 September 30, 2019 , NEECH or NEER guaranteed or provided indemnifications, letters of credit or surety bonds totaling approximately $682 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 September 30, 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 nine months ended September 30, 2019 , a subsidiary of NEECH provided, pursuant to a debt service reserve guarantee (see discussion above), approximately $31 million to fund the debt payment of Genesis HoldCo which is reflected as non-current due to related party at September 30, 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 and nine months ended September 30, 2019 , NEP recognized approximately $2 million and $5 million , respectively, and during the three and nine months ended September 30, 2018 NEP recognized less than $1 million and approximately $2 million , respectively, in revenues related to the transportation and fuel management agreements.

Summary of Significant Accounti

Summary of Significant Accounting and Reporting Policies	9 Months Ended
	Sep. 30, 2019
Accounting Policies [Abstract]
Summary of Significant Accounting and Reporting Policies	Summary of Significant Accounting and Reporting Policies Restricted Cash - A t September 30, 2019 and December 31, 2018 , NEP had approximately $4 million and $8 million , respectively, of restricted cash included in other current assets and $11 million and $11 million , respectively, of restricted cash included in other non-current assets on NEP's condensed consolidated balance sheets. Restricted cash is primarily related to amounts 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. NEP recognized a gain of approximately $153 million ( $201 million after tax) which is reflected as gain on disposal of Canadian Holdings in NEP's condensed consolidated statements of income. Income before income taxes associated with Canadian Holdings was approximately $47 million for the nine months ended September 30, 2018 . Noncontrolling Interests - At September 30, 2019 , NEE's approximately 62.5% noncontrolling limited partner interest in NEP OpCo, a non-affiliated party's 10% interest in one of the Texas pipelines, NEER's approximately 50% noncontrolling ownership interest in Silver State, the interests related to differential membership interests and the Class B noncontrolling ownership interests (the Class B noncontrolling interests in NEP Renewables sold in 2018 and NEP Renewables II sold in 2019) are reflected as noncontrolling interests on the condensed consolidated balance sheets. The impact of the net income (loss) attributable to the Class B noncontrolling interests and the differential membership interests are allocated to NEE's noncontrolling ownership interest and the net income attributable to NEP based on their respective ownership percentage of NEP OpCo. Details of the activity in noncontrolling interests are below: Class B Noncontrolling Ownership Interests Differential Membership Interests Noncontrolling Ownership Interests in NEP OpCo, Silver State and Texas pipeline Total Noncontrolling Nine months ended September 30, 2019 (millions) Balances, December 31, 2018 $ 751 $ 2,019 $ 422 $ 3,192 Net income (loss) attributable to NCI 12 (60 ) (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 Class B noncontrolling interest investors (5 ) — — (5 ) Other — — 1 1 Balances, March 31, 2019 758 1,983 307 — 3,048 Sale of Class B noncontrolling interest - net 893 — — 893 Acquisition of subsidiaries with noncontrolling ownership interest — — 472 472 Related party note receivable — — 1 1 Net income (loss) attributable to NCI 25 (63 ) (64 ) (102 ) Related party contributions — — 11 11 Related party distributions — — (56 ) (56 ) Differential membership interests contributions, net of distributions — (8 ) — (8 ) Payments to Class B noncontrolling interest investors (3 ) — — (3 ) Balances, June 30, 2019 1,673 1,912 671 — 4,256 Acquisition of subsidiaries with noncontrolling ownership interest — — (10 ) (10 ) Net income (loss) attributable to NCI 34 (64 ) (143 ) (173 ) Related party distributions — — (71 ) (71 ) Changes in non-economic ownership interests — — (6 ) (6 ) Differential membership interests contributions, net of distributions — 27 — 27 Payments to Class B noncontrolling interest investors (7 ) — — (7 ) Balances, September 30, 2019 $ 1,700 $ 1,875 $ 441 $ 4,016 Differential Membership Interests Noncontrolling Ownership Interests in NEP OpCo and Texas pipeline Total Noncontrolling Nine months ended September 30, 2018 (millions) Balances, December 31, 2017 $ — $ 34 $ 34 Related party note receivable — 29 29 Net income (loss) attributable to NCI (269 ) 170 (99 ) Other comprehensive income — 1 1 Related party distributions — (64 ) (64 ) Changes in non-economic ownership interests — (6 ) (6 ) Differential membership interests 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 Related party note receivable — 2 2 Net income (loss) attributable to NCI (39 ) 243 204 Other comprehensive loss — (4 ) (4 ) Related party distributions — (41 ) (41 ) Changes in non-economic ownership interests — 1 1 Differential membership interests contributions, net of distributions (6 ) — (6 ) Disposal of Canadian Holdings — 105 105 Adoption of accounting standards update — 2 2 Balances, June 30, 2018 1,122 473 — 1,595 Net income (loss) attributable to NCI (28 ) 99 71 Other comprehensive income — 15 15 Related party contributions — 1 1 Related party distributions — (48 ) (48 ) Changes in non-economic ownership interests — (1 ) (1 ) Differential membership interests contributions, net of distributions 23 — 23 Balances, September 30, 2018 $ 1,117 $ 539 $ 1,656

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 30, 2019
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Letter of Credit Facilities - Two of NEP’s projects have letter of credit (LOC) facilities under which the LOC lenders may issue standby letters of credit not to exceed approximately $65 million in the aggregate. These LOC facilities have maturity dates of June 2022 and July 2022. At September 30, 2019 , approximately $51 million of LOCs was outstanding primarily related to debt service reserves and as security for certain of the projects' agreements, including a PPA. Development, Engineering and Construction Commitments - At September 30, 2019 , a NEP subsidiary had several engineering, procurement and construction contracts related to the repowering of certain wind facilities. Those contracts have varying payment terms and some include performance obligations that allow the NEP subsidiary to receive liquidated damages if the contractor does not perform. As of September 30, 2019 , the NEP subsidiary has purchased approximately $16 million under these contracts, which costs have been capitalized in property, plant and equipment - net on the condensed consolidated balance sheet. As of September 30, 2019 , the NEP subsidiary has remaining commitments under these contracts of approximately $123 million . PG&E Bankruptcy - During the nine months ended September 30, 2019 , approximately $25 million of net income attributable to NEP relates to 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 which, among other things, has blocked the distribution of cash generated by those projects. In April 2019, a waiver of the PG&E-related event of default was obtained related to the Shafter solar project indebtedness which, subject to certain conditions, waived the lenders’ ability to accelerate the repayment of borrowings thereunder and therefore the debt outstanding related to Shafter was reclassified to long-term debt. At September 30, 2019 , the debt outstanding under the Genesis and Shafter financings totaled approximately $389 million , of which $363 million relating to Genesis had scheduled final maturity dates in 2038 and was classified as current debt on the condensed consolidated balance sheets. In response to the events of default caused by PG&E's bankruptcy under the Genesis financings, during the nine months ended September 30, 2019, an indirect subsidiary of NEP (the offeror) purchased approximately $236 million of outstanding principal of Genesis HoldCo 5.600% senior secured notes due 2038 (Genesis HoldCo notes). Genesis HoldCo is the indirect owner of the Genesis solar project. After the purchases and debt service payments totaling approximately $17 million during the nine months ended September 30, 2019, there is no outstanding principal for the Genesis HoldCo notes at September 30, 2019. In September 2019, the offeror also initiated a cash tender offer to purchase any and all of the outstanding 3.875% Series A Trust Certificates due 2038 (Series A certificates) and 5.125% Series B Trust Certificates due 2038 (Series B certificates) issued in connection with the initial development and construction of the Genesis solar project (the Genesis OpCo debt). Genesis OpCo is the direct owner of the Genesis solar project. The offeror accepted for purchase approximately $10 million in aggregate principal amount of the Series A certificates at a purchase price of $1,100 per $1,000 principal amount, and approximately $9 million in aggregate principal amount of the Series B certificates at a purchase price of $1,000 per $1,000 principal amount, which was settled in October 2019. In addition, the offeror purchased approximately $39 million in aggregate principal amount of the Series B certificates from two holders in September 2019 under the same pricing terms as the tender offer. NEP expects to acquire the remaining $344 million in outstanding Genesis OpCo debt prior to December 31, 2019. In addition, while PG&E or other stakeholders in the bankruptcy proceeding could seek to reject some or all of the PPAs, PG&E and an ad hoc group, including PG&E secured bondholders and the Official Committee of Tort Claimants, have each proposed plans of reorganization, which have contemplated that PG&E would assume all of the PPAs. Based on the estimated future cash flows related to the Genesis, Shafter and Desert Sunlight solar projects, no impairment adjustment was recorded at September 30, 2019 . NEP will continue to monitor its investments in these projects. At September 30, 2019 , cumulative cash distributions of approximately $79 million from these projects were not distributed as a result of the events of default under the financings that arose due to PG&E’s bankruptcy filing.

Acquisitions (Tables)

Acquisitions (Tables)	9 Months Ended
	Sep. 30, 2019
Business Combinations [Abstract]
Schedule of Identifiable Assets Acquired and Liabilities Assumed	The following table summarizes the preliminary amounts recognized by NEP for the estimated fair value of assets acquired and liabilities assumed in the June 2019 acquisition: As of June 11, 2019 (millions) Total consideration transferred $ 1,032 Identifiable assets acquired and liabilities assumed Cash $ 4 Accounts receivable, other receivables and prepaid expenses 159 Property, plant and equipment – net 400 Intangible assets – PPAs 1,080 Goodwill 14 Other non-current assets 133 Accounts payable, accrued expenses and other current liabilities (132 ) Other non-current liabilities (154 ) Noncontrolling interest (472 ) Total net identifiable assets, at fair value (a) $ 1,032 ______________________ (a) Includes a right of use asset of approximately $20 million and operating lease liabilities of approximately $21 million primarily related to a land use agreement that conveys exclusive use of the land for one of the acquired projects, which were calculated based on a discount rate of 4.57% based on the incremental borrowing rate and a remaining lease term of approximately 26 years as of the date of acquisition. At September 30, 2019, NEP expects to make fixed lease payments of approximately $2 million annually over the next five years and $25 million thereafter.
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 Nine Months Ended (millions) Unaudited pro forma results of operations: Pro forma revenues $ 201 $ 701 Pro forma operating income $ 58 $ 425 Pro forma net income $ 109 $ 378 Pro forma net income attributable to NEP $ 33 $ 244

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	9 Months Ended
	Sep. 30, 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: September 30, 2019 December 31, 2018 Level 1 Level 2 Total Level 1 Level 2 Total (millions) Assets: Cash equivalents $ 82 $ — $ 82 $ 71 $ — $ 71 Restricted cash equivalents (a) 10 — 10 12 — 12 Interest rate contracts — 13 13 — 24 24 Total assets $ 92 $ 13 $ 105 $ 83 $ 24 $ 107 Liabilities: Interest rate contracts $ — $ 698 $ 698 $ — $ 116 $ 116 Total liabilities $ — $ 698 $ 698 $ — $ 116 $ 116 ____________________ (a) At September 30, 2019 and December 31, 2018 , approximately $9 million and $9 million
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: September 30, 2019 December 31, 2018 Carrying Value Fair Value Carrying Value Fair Value (millions) Long-term debt, including current maturities (a) $ 4,098 $ 4,239 $ 3,435 $ 3,301 ____________________ (a) At September 30, 2019 and December 31, 2018 , approximately $4,041 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)	9 Months Ended
	Sep. 30, 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 September 30, 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. September 30, 2019 Gross Basis Net Basis Assets Liabilities Assets Liabilities (millions) Interest rate contracts $ 13 $ 698 $ — $ 685 Net fair value by balance sheet line item: Other current assets $ — Other non-current assets — Other current liabilities $ 6 Derivatives 679 Total derivatives $ — $ 685 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 September 30, Nine Months Ended September 30, 2019 2018 2019 2018 (millions) Interest rate contracts: Gains (losses) reclassified from AOCI to interest expense $ — $ — $ 5 $ (3 ) Gains (losses) recognized in interest expense $ (311 ) $ 74 $ (589 ) $ 55

Capitalization (Tables)

Capitalization (Tables)	9 Months Ended
	Sep. 30, 2019
Equity [Abstract]
Schedule of Debt	Significant long-term debt issuances and borrowings by subsidiaries of NEP during the nine months ended September 30, 2019 were as follows: Date Issued/Borrowed Debt Issuances/Borrowings Interest Rate Principal Amount Maturity Date (millions) May 2019 - June 2019 NEP OpCo senior secured revolving credit facility Variable (a) $ 450 (b)(c) 2024 June 2019 NEP OpCo senior unsecured notes 4.25% $ 700 (c) 2024 September 2019 NEP OpCo senior unsecured notes 3.875% $ 500 2026 ———————————— (a) Variable rate is based on an underlying index plus a margin. (b) Approximately $214 million of the funds drawn on the revolving credit facility was used to repay in full the outstanding indebtedness of certain projects under their respective limited-recourse financing agreements. During the three and nine months ended September 30, 2019 , approximately $6 million of debt issuance costs were amortized related to the repayment of the project debt. (c) In July 2019, the $450 million outstanding balance under the revolving credit facility was repaid with proceeds from the issuance of the June senior unsecured notes. See additional discussion below.
Schedule of Earnings Per Share, Basic and Diluted	The reconciliation of NEP's basic and diluted earnings per unit for the three and nine months ended September 30, 2018 is as follows: Three Months Ended September 30, 2018 Nine Months Ended September 30, 2018 (millions, except per unit amounts) Numerator: Net income attributable to NEP – basic $ 33 $ 189 Adjustments for convertible notes and preferred units 10 52 Net income attributable to NEP – assuming dilution $ 43 $ 241 Denominator: Weighted-average number of common units outstanding – basic 54.9 54.5 Convertible notes and preferred units 19.7 19.7 Weighted-average number of common units outstanding – assuming dilution 74.6 74.2 Earnings per unit attributable to NEP: Basic $ 0.60 $ 3.47 Assuming dilution $ 0.58 $ 3.25

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Income (Loss) (Tables)	9 Months Ended
	Sep. 30, 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 Investees Total (millions) Balances, December 31, 2018 $ 6 $ (24 ) $ (18 ) Amounts reclassified from AOCI to interest expense (6 ) — (6 ) Other comprehensive income related to equity method investees — 1 1 Net other comprehensive income (loss) (6 ) 1 (5 ) Balances, March 31, 2019 — (23 ) (23 ) Net other comprehensive income (loss) — — — Balances, June 30, 2019 — (23 ) (23 ) Net other comprehensive income (loss) — — — Balances, September 30, 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) 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 ) Amounts reclassified from AOCI to interest expense 1 — — 1 Net unrealized losses on foreign currency translation — (2 ) — (2 ) Other comprehensive income related to equity method investee — — (4 ) (4 ) Net other comprehensive income (loss) 1 (2 ) (4 ) (5 ) Impact of disposal of Canadian Holdings 3 104 — 107 Balances, June 30, 2018 6 — (30 ) (24 ) Amounts reclassified from AOCI to interest expense (1 ) — — (1 ) Other comprehensive income related to equity method investee — — 9 9 Net other comprehensive income (loss) (1 ) — 9 8 Balances, September 30, 2018 $ 5 $ — $ (21 ) $ (16 ) AOCI attributable to noncontrolling interest $ 4 $ — $ (15 ) $ (11 ) AOCI attributable to NEP $ 1 $ — $ (6 ) $ (5 )

Summary of Significant Accoun_2

Summary of Significant Accounting and Reporting Policies (Tables)	9 Months Ended
	Sep. 30, 2019
Non-controlling Interests [Member]
Noncontrolling Interest [Line Items]
Schedule of Noncontrolling Interest	Details of the activity in noncontrolling interests are below: Class B Noncontrolling Ownership Interests Differential Membership Interests Noncontrolling Ownership Interests in NEP OpCo, Silver State and Texas pipeline Total Noncontrolling Nine months ended September 30, 2019 (millions) Balances, December 31, 2018 $ 751 $ 2,019 $ 422 $ 3,192 Net income (loss) attributable to NCI 12 (60 ) (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 Class B noncontrolling interest investors (5 ) — — (5 ) Other — — 1 1 Balances, March 31, 2019 758 1,983 307 — 3,048 Sale of Class B noncontrolling interest - net 893 — — 893 Acquisition of subsidiaries with noncontrolling ownership interest — — 472 472 Related party note receivable — — 1 1 Net income (loss) attributable to NCI 25 (63 ) (64 ) (102 ) Related party contributions — — 11 11 Related party distributions — — (56 ) (56 ) Differential membership interests contributions, net of distributions — (8 ) — (8 ) Payments to Class B noncontrolling interest investors (3 ) — — (3 ) Balances, June 30, 2019 1,673 1,912 671 — 4,256 Acquisition of subsidiaries with noncontrolling ownership interest — — (10 ) (10 ) Net income (loss) attributable to NCI 34 (64 ) (143 ) (173 ) Related party distributions — — (71 ) (71 ) Changes in non-economic ownership interests — — (6 ) (6 ) Differential membership interests contributions, net of distributions — 27 — 27 Payments to Class B noncontrolling interest investors (7 ) — — (7 ) Balances, September 30, 2019 $ 1,700 $ 1,875 $ 441 $ 4,016 Differential Membership Interests Noncontrolling Ownership Interests in NEP OpCo and Texas pipeline Total Noncontrolling Nine months ended September 30, 2018 (millions) Balances, December 31, 2017 $ — $ 34 $ 34 Related party note receivable — 29 29 Net income (loss) attributable to NCI (269 ) 170 (99 ) Other comprehensive income — 1 1 Related party distributions — (64 ) (64 ) Changes in non-economic ownership interests — (6 ) (6 ) Differential membership interests 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 Related party note receivable — 2 2 Net income (loss) attributable to NCI (39 ) 243 204 Other comprehensive loss — (4 ) (4 ) Related party distributions — (41 ) (41 ) Changes in non-economic ownership interests — 1 1 Differential membership interests contributions, net of distributions (6 ) — (6 ) Disposal of Canadian Holdings — 105 105 Adoption of accounting standards update — 2 2 Balances, June 30, 2018 1,122 473 — 1,595 Net income (loss) attributable to NCI (28 ) 99 71 Other comprehensive income — 15 15 Related party contributions — 1 1 Related party distributions — (48 ) (48 ) Changes in non-economic ownership interests — (1 ) (1 ) Differential membership interests contributions, net of distributions 23 — 23 Balances, September 30, 2018 $ 1,117 $ 539 $ 1,656

Acquisitions - Narrative (Detai

Acquisitions - Narrative (Details) $ in Millions	Sep. 29, 2019USD ($)miBcf	Jun. 11, 2019USD ($)solar_generation_facilityMW	Sep. 30, 2019USD ($)	Dec. 31, 2018USD ($)solar_generation_facilitywind_generation_facilityMW
Business Acquisition [Line Items]
Goodwill			$ 609	$ 584
NEP Renewables, LLC [Member]
Business Acquisition [Line Items]
Generation facility capacity (mw) | MW				1,388
Number of solar generation facilities | solar_generation_facility				1
Number of wind generation facilities | wind_generation_facility				10
June 2019 Acquisition [Member]
Business Acquisition [Line Items]
Amortization of the intangible assets - PPAs expected in 2019			39
Amortization of the intangible assets - PPAs expected in 2020			70
Cash consideration		$ 1,020
Working capital		12
Intangible assets – PPAs		1,080	30
Goodwill		14	11
Other non-current liabilities		154	1
Property, plant and equipment – net		400	50
Noncontrolling interest		$ 472	$ 10
Ashtabula Wind II, LLC [Member]
Business Acquisition [Line Items]
Membership interests acquired		100.00%
Generation facility capacity (mw) | MW		120
Garden Wind, LLC [Member]
Business Acquisition [Line Items]
Membership interests acquired		100.00%
Generation facility capacity (mw) | 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) | MW		150
Rosmar Holdings, LLC [Member]
Business Acquisition [Line Items]
Membership interests acquired		100.00%
Generation facility capacity (mw) | MW		132
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) | MW		250
Meade Pipeline Co LLC [Member] | Meade Pipeline Investment, LLC [Member]
Business Acquisition [Line Items]
Cash consideration	$ 1,280
Estimated future capital contributions	$ 90
Meade Pipeline Co LLC [Member] | Central Penn Line [Member]
Business Acquisition [Line Items]
Noncontrolling ownership interest	40.00%
Additional Pipeline Volume Per Day | Bcf	0.6
Length Of Natural Gas Pipeline | mi	185
Natural Gas Pipeline, Transport And Deliver Volume | Bcf	1,700,000,000
Meade Pipeline Co LLC [Member] | Central Penn Line [Member] | Meade Pipeline Investment, LLC [Member]
Business Acquisition [Line Items]
Noncontrolling ownership interest	39.20%

Acquisitions - Schedule of Iden

Acquisitions - Schedule of Identifiable Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Millions	Jun. 11, 2019	Sep. 30, 2019	Dec. 31, 2018
Identifiable assets acquired and liabilities assumed
Goodwill		$ 609	$ 584
June 2019 Acquisition [Member]
Business Acquisition [Line Items]
Total consideration transferred	$ 1,032
Identifiable assets acquired and liabilities assumed
Cash	4
Accounts receivable, other receivables and prepaid expenses	159
Property, plant and equipment – net	400	50
Intangible assets – PPAs	1,080	30
Goodwill	14	11
Other non-current assets	133
Accounts payable, accrued expenses and other current liabilities	(132)
Other non-current liabilities	(154)	(1)
Noncontrolling interest	(472)	(10)
Total net identifiable assets, at fair value	1,032
Amortization of the intangible assets - PPAs expected in 2019		39
Amortization of the intangible assets - PPAs expected in 2020		70
Amortization of the intangible assets - PPAs expected in 2021		70
Amortization of the intangible assets - PPAs expected in 2022		70
Amortization of the intangible assets - PPAs expected in 2023		70
Right of use asset	20
Operating lease liabilities	$ 21
Discount rate	4.57%
Remaining lease term	26 years
Fixed lease payments expected in 2019		2
Fixed lease payments expected in 2020		2
Fixed lease payments expected in 2021		2
Fixed lease payments expected in 2022		2
Fixed lease payments expected in 2023		2
Fixed lease payments expected thereafter		$ 25

Acquisitions - Supplemental Una

Acquisitions - Supplemental Unaudited Pro forma Results of Operations (Details) - NEP Renewables, LLC [Member] - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2018
Unaudited pro forma results of operations:
Pro forma revenues	$ 201	$ 701
Pro forma operating income	58	425
Pro forma net income	109	378
Pro forma net income attributable to NEP	$ 33	$ 244

Revenue (Details)

Revenue (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Renewable Energy Sales [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue from contract with customer	$ 213	$ 121	$ 513	$ 418
Revenues over the remaining terms of the related contacts	215		215
Natural Gas Transportation Services [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue from contract with customer	52	$ 52	155	$ 162
Revenues over the remaining terms of the related contacts	$ 2,100		$ 2,100

Income Taxes (Details)

Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended			9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018		Sep. 30, 2019	Sep. 30, 2018
Income Tax Contingency [Line Items]
Effective tax rate (as a percent)	7.00%	12.00%		7.00%	3.00%
Tax benefit from Disposal of Canadian Holdings					$ 47
Removal of deferred tax liabilities				$ 35	(23)	[1]
INCOME TAX EXPENSE (BENEFIT)	$ (18)	$ 15	[2]	(35)	13	[2]
Taxes attributable to the noncontrolling interests	$ 38			$ 80
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]
Removal of deferred tax liabilities					69
Domestic Tax Authority [Member]
Income Tax Contingency [Line Items]
INCOME TAX EXPENSE (BENEFIT)					$ 22
[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.

Fair Value Measurements - Asset

Fair Value Measurements - Assets and Liabilities Measured on a Recurring Basis (Details) - USD ($) $ in Millions	Sep. 30, 2019	Dec. 31, 2018
Liabilities:
Restricted cash equivalents	$ 9	$ 9
Recurring Basis [Member]
Assets:
Cash equivalents	82	71
Restricted cash equivalents	10	12
Interest rate contracts	13	24
Total assets	105	107
Liabilities:
Interest rate contracts	698	116
Total liabilities	698	116
Recurring Basis [Member] | Level 1 [Member]
Assets:
Cash equivalents	82	71
Restricted cash equivalents	10	12
Interest rate contracts	0	0
Total assets	92	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	13	24
Total assets	13	24
Liabilities:
Interest rate contracts	698	116
Total liabilities	$ 698	$ 116

Fair Value Measurements - Carry

Fair Value Measurements - Carrying Value and Fair Value of Other Financial Instruments (Details) - USD ($) $ in Millions	Sep. 30, 2019	Dec. 31, 2018
Carrying Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, including current maturities	$ 4,098	$ 3,435
Level 2 [Member] | Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, including current maturities	4,239	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	$ 4,041	$ 2,826

Derivative Instruments and He_3

Derivative Instruments and Hedging Activity - Narrative (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Interest Rate Swap [Member]
Derivative [Line Items]
Notional amount		$ 6,839		$ 7,056
Interest Rate Contract [Member]
Derivative [Line Items]
Gains (losses) reclassified from AOCI to interest expense		6
Foreign Currency Contract [Member] | Not Designated as Hedging Instrument [Member]
Derivative [Line Items]
Gains related to foreign currency contract	$ 1		$ 13
Credit Risk Related Contingent Contracts [Member]
Derivative [Line Items]
Liabilities		$ 640		$ 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	Sep. 30, 2019	Dec. 31, 2018
Derivatives, Fair Value [Line Items]
Assets	$ 0	$ 13
Liabilities	685	105
Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Assets	0	7
Other Noncurrent Assets [Member]
Derivatives, Fair Value [Line Items]
Assets	0	6
Other Current Liabilities [Member]
Derivatives, Fair Value [Line Items]
Liabilities	6	1
Derivatives [Member]
Derivatives, Fair Value [Line Items]
Liabilities	679	104
Interest Rate Contract [Member]
Derivatives, Fair Value [Line Items]
Assets	0	13
Liabilities	685	105
Not Designated as Hedging Instrument [Member] | Interest Rate Contract [Member]
Derivatives, Fair Value [Line Items]
Assets	13	24
Liabilities	$ 698	$ 116

Derivative Instruments and He_5

Derivative Instruments and Hedging Activity - Gains (Losses) Related to Cash Flow Hedges (Details) - Interest Rate Contract [Member] - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Derivative Instruments, Gain (Loss) [Line Items]
Gains (losses) reclassified from AOCI to interest expense			$ 6
Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gains (losses) reclassified from AOCI to interest expense	$ 0	$ 0	5	$ (3)
Interest Expense [Member] | Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gains (losses) recognized in interest expense	$ (311)	$ 74	$ (589)	$ 55

Variable Interest Entities (Det

Variable Interest Entities (Details) $ in Millions	9 Months Ended
	Sep. 30, 2019USD ($)variable_interest_entityelectric_generation_facilityequity_investmentMWshares	Dec. 31, 2018USD ($)
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
Subsidiaries [Member]
Variable Interest Entity [Line Items]
Number of investments | equity_investment	3
Generation facility capacity (mw) | MW	277
Economic rights percentage	100.00%
NEP OpCo [Member]
Variable Interest Entity [Line Items]
Ownership interests percentage	50.00%
Noncurrent assets	$ 11	$ 20
Noncurrent liabilities	$ 13
Class B Units, Series 1 [Member] | NextEra Energy Partners, LP [Member] | NEP OpCo [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] | NEP OpCo [Member]
Variable Interest Entity [Line Items]
Number of units issued (in units) | shares	1,000,000
VIEs Wind And Solar [Member] | Variable Interest Entity, Primary Beneficiary [Member]
Variable Interest Entity [Line Items]
Assets	$ 4,850	4,937
Liabilities	120	132
NEP Renewables, LLC [Member] | Variable Interest Entity, Primary Beneficiary [Member]
Variable Interest Entity [Line Items]
Assets	2,281	2,339
Liabilities	$ 94	$ 89
NEP Renewables II, LLC [Member] | Variable Interest Entity, Primary Beneficiary [Member]
Variable Interest Entity [Line Items]
Number of entities consolidated | variable_interest_entity	2
Assets	$ 2,207
Liabilities	$ 326
NEP OpCo [Member]
Variable Interest Entity [Line Items]
Limited partner interest percentage	37.50%
Noncontrolling limited partner interest percentage	62.50%

Capitalization - Schedule of De

Capitalization - Schedule of Debt (Details) - NEP OpCo [Member] - USD ($)	1 Months Ended	3 Months Ended	9 Months Ended
	Jul. 24, 2019	Sep. 30, 2019	Sep. 30, 2019	Sep. 23, 2019	Jun. 30, 2019	Jun. 27, 2019
Secured Debt [Member]
Debt Instrument [Line Items]
Amortization of debt issuance costs		$ 6,000,000	$ 6,000,000
Secured Debt [Member] | Revolving Credit Facility [Member]
Debt Instrument [Line Items]
NEP OpCo senior secured revolving credit facility		$ 450,000,000	$ 450,000,000
Repayments of revolving credit facility	$ 450,000,000
Unsecured Debt [Member]
Debt Instrument [Line Items]
Interest Rate		3.875%	3.875%	3.875%	4.25%	4.25%
NEP OpCo senior unsecured notes		$ 500,000,000	$ 500,000,000	$ 500,000,000	$ 700,000,000	$ 700,000,000
Limited Recourse Debt [Member]
Debt Instrument [Line Items]
Repayments of outstanding indebtedness			$ 214,000,000

Capitalization - Narrative (Det

Capitalization - Narrative (Details) $ / shares in Units, shares in Thousands	Oct. 21, 2019$ / shares	Sep. 23, 2019USD ($)	Jun. 27, 2019USD ($)	Jun. 11, 2019USD ($)MW	Sep. 30, 2019USD ($)shares	Sep. 30, 2019USD ($)shares	Oct. 23, 2019USD ($)	Sep. 29, 2019USD ($)	Jun. 30, 2019USD ($)	May 03, 2019USD ($)
Class of Stock [Line Items]
Antidilutive shares (in shares) | shares					15,900	18,400
Subsequent Event [Member]
Class of Stock [Line Items]
Distribution made to limited partner, distributions declared, per unit (in dollars per share) | $ / shares	$ 0.5175
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%
Membership Purchase Agreement [Member]
Class of Stock [Line Items]
Period of cash distributions						6 years
Membership Purchase Agreement [Member] | First Six Years After Closing [Member]
Class of Stock [Line Items]
Percentage of cash distributions						99.00%
Series A Convertible Preferred Units [Member]
Class of Stock [Line Items]
Conversion of stock, shares converted (in shares) | shares					4,670
Conversion ratio					1
Common Units [Member] | LLC Agreement [Member]
Class of Stock [Line Items]
Right to pay						70.00%
Common Units [Member] | Membership Purchase Agreement [Member]
Class of Stock [Line Items]
Right to pay						100.00%
NEP Renewables II, LLC [Member]
Class of Stock [Line Items]
Purchaser's commitment to pay				$ 900,000,000
NEP Renewables II, LLC [Member] | Class B Member Units [Member]
Class of Stock [Line Items]
Membership interests acquired				100.00%
Meade Pipeline Investment, LLC [Member] | Meade Pipeline Co LLC [Member]
Class of Stock [Line Items]
Credit facility, maximum borrowing capacity								$ 918,000,000
Issuances of long-term debt								$ 820,000,000
NEP OpCo [Member]
Class of Stock [Line Items]
Membership interests acquired					50.00%	50.00%
NEP OpCo [Member] | Unsecured Debt [Member]
Class of Stock [Line Items]
Aggregate principal amount		$ 500,000,000	$ 700,000,000		$ 500,000,000	$ 500,000,000			$ 700,000,000
Interest rate		3.875%	4.25%		3.875%	3.875%			4.25%
NEP OpCo [Member] | Unsecured Debt [Member] | Prior to April 15, 2024 [Member]
Class of Stock [Line Items]
Redemption price, percentage		100.00%	100.00%
NEP OpCo [Member] | Unsecured Debt [Member] | On or after April 15, 2024 [Member]
Class of Stock [Line Items]
Redemption price, percentage		100.00%	100.00%
NEP OpCo [Member] | Revolving Credit Facility [Member]
Class of Stock [Line Items]
Credit facility, maximum borrowing capacity									$ 750,000,000	$ 1,250,000,000
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 Holdings II, LLC [Member] | NEP Renewables II, LLC [Member]
Class of Stock [Line Items]
Noncontrolling interest, ownership percentage by parent				100.00%
NEP Renewables II, LLC [Member] | Perrin Ranch Wind Energy Center [Member]
Class of Stock [Line Items]
Membership interests acquired				100.00%
Generation facility capacity (mw) | MW				99
NEP Renewables II, LLC [Member] | Tuscola Bay Wind Energy Center [Member]
Class of Stock [Line Items]
Membership interests acquired				100.00%
Generation facility capacity (mw) | MW				120
NEP Renewables II, LLC [Member] | Ashtabula Wind III Energy Center [Member]
Class of Stock [Line Items]
Membership interests acquired				100.00%
Generation facility capacity (mw) | MW				62
NEP Renewables II, LLC [Member] | Stateline Wind Energy Center [Member]
Class of Stock [Line Items]
Membership interests acquired				100.00%
Generation facility capacity (mw) | MW				300
NEP Pipelines Class B [Member]
Class of Stock [Line Items]
Noncontrolling interest, ownership percentage by parent								100.00%
Noncontrolling interest commitment								$ 168,000,000
NEP Pipelines Class B [Member] | Membership Purchase Agreement [Member]
Class of Stock [Line Items]
Pre-tax return						11.00%
NEP Pipelines Class B [Member] | Membership Purchase Agreement [Member] | First Six Years After Closing [Member]
Class of Stock [Line Items]
Percentage of cash distributions						1.00%
NEP Pipelines Class B [Member] | Class B Member Units [Member]
Class of Stock [Line Items]
Ownership percentage upon non-exercise of buyout					99.00%	99.00%
NEP Pipelines Class A [Member]
Class of Stock [Line Items]
Noncontrolling interest, ownership percentage by parent								100.00%
Senior Secured Notes 5.600% Due 2038 [Member] | Genesis HoldCo [Member] | Secured Debt [Member]
Class of Stock [Line Items]
Interest rate					5.60%	5.60%
Repurchase amount					$ 236,000,000	$ 236,000,000
Series B Trust Certificates Due 2038 [Member]
Class of Stock [Line Items]
Interest rate					5.125%	5.125%
Series B Trust Certificates Due 2038 [Member] | Subsequent Event [Member]
Class of Stock [Line Items]
Repurchase amount							$ 9,000,000
Series B Trust Certificates Due 2038 [Member] | Genesis HoldCo [Member]
Class of Stock [Line Items]
Repurchase amount					$ 39,000,000	$ 39,000,000
Series B Trust Certificates Due 2038 [Member] | Genesis OpCo [Member]
Class of Stock [Line Items]
Repurchase amount					$ 39,000,000	$ 39,000,000

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			9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018		Sep. 30, 2019	Sep. 30, 2018
Numerator:
Net income attributable to NEP – basic	$ (72)	$ 33	[1]	$ (122)	$ 189	[1]
Adjustments for convertible notes and preferred units		10			52
Net income attributable to NEP – assuming dilution		$ 43			$ 241
Denominator:
Weighted average number of common units outstanding - basic (in shares)	59.9	54.9	[1]	57.4	54.5	[1]
Convertible notes and preferred units (in shares)		19.7			19.7
Weighted-average number of common units outstanding – assuming dilution (in shares)	75.8	74.6	[1]	75.8	74.2	[1]
Earnings per unit attributable to NEP:
Basic (in shares)	$ (1.21)	$ 0.60	[1]	$ (2.12)	$ 3.47	[1]
Assuming dilution (in shares)	$ (1.21)	$ 0.58	[1]	$ (2.12)	$ 3.25	[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									9 Months Ended
		Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2018		Jun. 30, 2018		Mar. 31, 2018		Sep. 30, 2019	Sep. 30, 2018
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance		$ 6,500	$ 5,345	$ 5,538	$ 3,904	[1]	$ 3,583	[1]	$ 2,224	[1]	$ 5,538	$ 2,224	[1]
Total other comprehensive income (loss), net of tax		0	0	(5)	8	[1],[2]	(5)	[1]	1	[1]	(5)	4	[2]
Impact of disposal of Canadian Holdings	[1]						107
Ending balance		6,176	6,500	5,345	4,046	[1]	3,904	[1]	3,583	[1]	6,176	4,046	[1]
Total
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance		(23)	(23)	(18)	(24)		(126)		(127)		(18)	(127)
Ending balance		(23)	(23)	(23)	(16)		(24)		(126)		(23)	(16)
Net Unrealized Gains (Losses) on Cash Flow Hedges [Member]
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance		0	0	6	6		2		1		6	1
Amounts reclassified from AOCI to interest expense				(6)	(1)		1		1
Total other comprehensive income (loss), net of tax		0	0	(6)	(1)		1		1
Impact of disposal of Canadian Holdings	[1]						3
Ending balance		0	0	0	5		6		2		0	5
Net Unrealized Gains (Losses) on Foreign Currency Translation [Member]
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance					0		(102)		(98)			(98)
Other comprehensive income (loss)							(2)		(4)
Total other comprehensive income (loss), net of tax					0		(2)		(4)
Impact of disposal of Canadian Holdings	[1]						104
Ending balance					0		0		(102)			0
Other Comprehensive Income (Loss) Related to Equity Method Investee [Member]
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance		(23)	(23)	(24)	(30)		(26)		(30)		(24)	(30)
Other comprehensive income (loss)				1	9		(4)		4
Total other comprehensive income (loss), net of tax		0	0	1	9		(4)		4
Impact of disposal of Canadian Holdings	[1]						0
Ending balance		(23)	$ (23)	$ (23)	(21)		$ (30)		$ (26)		(23)	(21)
Total Attributable to Noncontrolling Interest [Member]
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Ending balance		(15)			(11)						(15)	(11)
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			4						0	4
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					0							0
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)			(15)						(15)	(15)
Total Attributable to Parent [Member]
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Ending balance		(8)			(5)						(8)	(5)
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			1						0	1
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					0							0
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)			$ (6)						$ (8)	$ (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.

Related Party Transactions (Det

Related Party Transactions (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018		Dec. 31, 2018
Related Party Transaction [Line Items]
Due from related parties	$ 527		$ 527			$ 68
Funding of debt payment			1,001	$ 74	[1]
Revenue from related parties (less than for the three months ended June 30, 2018)	2	$ 1	5	3
Transportation and Fuel Management Agreement [Member]
Related Party Transaction [Line Items]
Revenue from related parties (less than for the three months ended June 30, 2018)	2	1	5	2
NextEra Energy, Inc. [Member] | Management Services Agreement [Member]
Related Party Transaction [Line Items]
Expenses from transactions with related party	24	20	68	57
NEER [Member] | Cash Sweep and Credit Support Agreement [Member]
Related Party Transaction [Line Items]
Interest expense	1	$ 1	4	$ 3
Due from related parties	525		$ 525			$ 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		69
NextEra Energy Capital Holdings [Member] | Guarantees and Letters of Credit [Member]
Related Party Transaction [Line Items]
Total amount of letters of credit	$ 682		682
NextEra Energy Capital Holdings [Member] | Genesis Solar Funding, LLC [Member] | Genesis Solar Funding, LLC [Member]
Related Party Transaction [Line Items]
Funding of debt payment			$ 31
[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 ($)	Jun. 30, 2018USD ($)	Jun. 30, 2018CAD ($)	Sep. 30, 2019USD ($)	Sep. 30, 2018USD ($)solar_generation_facilitywind_generation_facilityMW		Sep. 30, 2019USD ($)pipeline	Sep. 30, 2018USD ($)solar_generation_facilitywind_generation_facilityMW		Dec. 31, 2018USD ($)
Property, Plant and Equipment [Line Items]
Restricted cash, current				$ 4			$ 4			$ 8
Restricted cash, noncurrent				11			11			$ 11
Proceeds from the sale of Canadian Holdings - net							0	$ 517	[1]
Gain on disposal of Canadian Holdings				0	$ 0	[2]	0	153	[1],[2]
Income before income taxes				$ (261)	125	[2]	$ (523)	396	[2]
Canadian Holdings [Member]
Property, Plant and Equipment [Line Items]
Income before income taxes								47
Non Affiliated Party [Member]
Property, Plant and Equipment [Line Items]
Noncontrolling ownership interest				10.00%			10.00%
Number Of Pipelines | pipeline							1
NEP OpCo [Member]
Property, Plant and Equipment [Line Items]
Noncontrolling ownership interest				62.50%			62.50%
Silver State [Member]
Property, Plant and Equipment [Line Items]
Noncontrolling ownership interest				50.00%			50.00%
Canadian Holdings [Member] | Disposal Group, 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			$ 676
Number of wind generation facilities | wind_generation_facility					4			4
Number of solar generation facilities | solar_generation_facility					2			2
Generation facility capacity (mw) | MW					396			396
Gain on disposal of Canadian Holdings		153
Gain on disposal of Canadian Holdings, after tax		$ 201
[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.

Summary of Significant Accoun_4

Summary of Significant Accounting and Reporting Policies - Noncontrolling Interests (Details) - USD ($)		3 Months Ended									9 Months Ended
		Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2018		Jun. 30, 2018		Mar. 31, 2018		Sep. 30, 2019	Sep. 30, 2018		Apr. 01, 2018	Jan. 01, 2018
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
Balances, beginning of period				$ 3,192,000,000	$ 0						$ 3,192,000,000
Sale of Class B noncontrolling interest - net			$ 893,000,000
Acquisition of subsidiaries with noncontrolling ownership interest		$ 11,000,000	472,000,000
Related party note receivable			1,000,000				$ 2,000,000	[1]	$ 29,000,000	[1]
Net income (loss) attributable to NCI		(173,000,000)			71,000,000	[2]					(380,000,000)	$ 176,000,000	[2]
Related party contributions			11,000,000	1,000,000	1,000,000
Related party distributions		(71,000,000)	(56,000,000)	(51,000,000)	(48,000,000)		(41,000,000)	[1]	(64,000,000)	[1]
Changes in non-economic ownership interests		(6,000,000)		(6,000,000)	(1,000,000)	[1]	1,000,000	[1]	(6,000,000)	[1]
Payments to Class B noncontrolling interests investors		(7,000,000)	(3,000,000)	(5,000,000)
Adoption of accounting standards update	[1]													$ 0	$ 1,423,000,000
Other		0	1,000,000	1,000,000
Balances, end of period		4,016,000,000					0				4,016,000,000
Net income (loss) attributable to NCI		(173,000,000)			71,000,000	[2]					(380,000,000)	176,000,000	[2]
Net loss attributable to NEP – basic		72,000,000			(33,000,000)	[2]					122,000,000	(189,000,000)	[2]
Accounting Standards Update 2017-05 [Member]
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
Income (loss) attributable to noncontrolling interest, before tax												231,000,000
Noncontrolling Ownership Interests In NEP OpCo Subsidiary [Member]
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
Balances, beginning of period		1,673,000,000	758,000,000	751,000,000							751,000,000
Sale of Class B noncontrolling interest - net			893,000,000
Net income (loss) attributable to NCI		34,000,000	25,000,000	12,000,000
Payments to Class B noncontrolling interests investors		(7,000,000)	(3,000,000)	(5,000,000)
Balances, end of period		1,700,000,000	1,673,000,000	758,000,000							1,700,000,000
Net income (loss) attributable to NCI		34,000,000	25,000,000	12,000,000
Differential Membership Interests [Member]
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
Balances, beginning of period		1,912,000,000	1,983,000,000	2,019,000,000	1,122,000,000		1,167,000,000		0		2,019,000,000	0
Net income (loss) attributable to NCI		(64,000,000)	(63,000,000)	(60,000,000)	(28,000,000)		(39,000,000)		(269,000,000)
Differential membership interests contributions, net of distributions		27,000,000	(8,000,000)	24,000,000	23,000,000		(6,000,000)		23,000,000
Adoption of accounting standards update															1,413,000,000
Balances, end of period		1,875,000,000	1,912,000,000	1,983,000,000	1,117,000,000		1,122,000,000		1,167,000,000		1,875,000,000	1,117,000,000
Net income (loss) attributable to NCI		(64,000,000)	(63,000,000)	(60,000,000)	(28,000,000)		(39,000,000)		(269,000,000)
Noncontrolling Ownership Interests in NEP OpCo and Texas Pipeline [Member]
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
Balances, beginning of period		671,000,000	307,000,000	422,000,000	473,000,000		165,000,000		34,000,000		422,000,000	34,000,000
Sale of Class B noncontrolling interest - net							105,000,000
Acquisition of subsidiaries with noncontrolling ownership interest		(10,000,000)	472,000,000
Related party note receivable			1,000,000				2,000,000		29,000,000
Net income (loss) attributable to NCI		(143,000,000)	(64,000,000)	(57,000,000)	99,000,000		243,000,000		170,000,000
Other comprehensive income (loss)				(3,000,000)	15,000,000		(4,000,000)		1,000,000
Related party contributions			11,000,000	1,000,000	1,000,000
Related party distributions		(71,000,000)	(56,000,000)	(51,000,000)	(48,000,000)		(41,000,000)		(64,000,000)
Changes in non-economic ownership interests		(6,000,000)		(6,000,000)	(1,000,000)		1,000,000		(6,000,000)
Adoption of accounting standards update														2,000,000	1,000,000
Other				1,000,000
Balances, end of period		441,000,000	671,000,000	307,000,000	539,000,000		473,000,000		165,000,000		441,000,000	539,000,000
Net income (loss) attributable to NCI		(143,000,000)	(64,000,000)	(57,000,000)	99,000,000		243,000,000		170,000,000
Non-controlling Interests [Member]
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
Balances, beginning of period		4,256,000,000	3,048,000,000	3,192,000,000	1,595,000,000		1,332,000,000		34,000,000		3,192,000,000	34,000,000
Sale of Class B noncontrolling interest - net			893,000,000				105,000,000
Acquisition of subsidiaries with noncontrolling ownership interest		(10,000,000)	472,000,000
Related party note receivable			1,000,000				2,000,000		29,000,000
Net income (loss) attributable to NCI		(173,000,000)	(102,000,000)	(105,000,000)	71,000,000		204,000,000		(99,000,000)
Other comprehensive income (loss)				(3,000,000)	15,000,000		(4,000,000)		1,000,000
Related party contributions			11,000,000	1,000,000	1,000,000
Related party distributions		(71,000,000)	(56,000,000)	(51,000,000)	(48,000,000)		(41,000,000)		(64,000,000)
Changes in non-economic ownership interests		(6,000,000)		(6,000,000)	(1,000,000)		1,000,000		(6,000,000)
Differential membership interests contributions, net of distributions		27,000,000	(8,000,000)	24,000,000	23,000,000		(6,000,000)		23,000,000
Payments to Class B noncontrolling interests investors		(7,000,000)	(3,000,000)	(5,000,000)
Adoption of accounting standards update														$ 2,000,000	$ 1,414,000,000
Other				1,000,000
Balances, end of period		4,016,000,000	4,256,000,000	3,048,000,000	1,656,000,000		1,595,000,000		1,332,000,000		$ 4,016,000,000	$ 1,656,000,000
Net income (loss) attributable to NCI		$ (173,000,000)	$ (102,000,000)	$ (105,000,000)	$ 71,000,000		$ 204,000,000		$ (99,000,000)
[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)	1 Months Ended	9 Months Ended
	Sep. 30, 2019USD ($)holderletter_of_credit	Sep. 30, 2019USD ($)letter_of_credit	Dec. 31, 2019USD ($)	Oct. 23, 2019USD ($)
Loss Contingencies [Line Items]
Number of letters of credit | letter_of_credit	2	2
Payments to acquire projects	$ 16,000,000	$ 16,000,000
Remaining commitments	123,000,000	123,000,000
Net income attributable to NEP from PPAs		25,000,000
Debt defaulted	$ 389,000,000	389,000,000
Number of holders | holder	2
Impairment adjustment		0
Cash distributions not made		79,000,000
Current Debt [Member]
Loss Contingencies [Line Items]
Debt defaulted	$ 363,000,000	$ 363,000,000
Series A Trust Certificates Due 2038 [Member]
Loss Contingencies [Line Items]
Interest Rate	3.875%	3.875%
Series B Trust Certificates Due 2038 [Member]
Loss Contingencies [Line Items]
Interest Rate	5.125%	5.125%
Standby Letters of Credit [Member] | Letters of Credit Due June and July 2022 [Member]
Loss Contingencies [Line Items]
Credit facility, maximum borrowing capacity	$ 65,000,000	$ 65,000,000
Credit facility, amount outstanding	51,000,000	51,000,000
Genesis HoldCo [Member] | Series B Trust Certificates Due 2038 [Member]
Loss Contingencies [Line Items]
Repurchase amount	39,000,000	39,000,000
Genesis OpCo [Member] | Series B Trust Certificates Due 2038 [Member]
Loss Contingencies [Line Items]
Repurchase amount	$ 39,000,000	$ 39,000,000
Secured Debt [Member] | Genesis HoldCo [Member] | Senior Secured Notes 5.600% Due 2038 [Member]
Loss Contingencies [Line Items]
Interest Rate	5.60%	5.60%
Purchase and service payments		$ 17,000,000
Repurchase amount	$ 236,000,000	$ 236,000,000
Repurchase ratio	0.95	0.95
Secured Debt [Member] | Genesis OpCo [Member] | Forecast [Member]
Loss Contingencies [Line Items]
Repurchase amount			$ 344,000,000
Subsequent Event [Member] | Series A Trust Certificates Due 2038 [Member]
Loss Contingencies [Line Items]
Outstanding principal				$ 1,000
Repurchase amount				10,000,000
Purchase price				1,100
Subsequent Event [Member] | Series B Trust Certificates Due 2038 [Member]
Loss Contingencies [Line Items]
Outstanding principal				1,000
Repurchase amount				9,000,000
Purchase price				$ 1,000

Uncategorized Items - nep10q3q2

Label	Element	Value	[1]
Limited Partner [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	$ (2,000,000)
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	2,000,000
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.