Summary of Significant Accounting and Reporting Policies (Tables)

6 Months Ended

Jun. 30, 2020

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		NEER's Noncontrolling Ownership Interests in NEP OpCo and Silver State		Other Noncontrolling Ownership Interests		Total Noncontrolling Interests
Six months ended June 30, 2020	(millions)
Balances, December 31, 2019	$	2,628	$	1,798	$	389	$	68	$	4,883
Net income (loss) attributable to NCI	52		(71)		(459)		(22)		(500)
Related party contributions	—		—		—		3		3
Related party distributions	—		—		(60)		(2)		(62)
Differential membership investment contributions, net of distributions	—		40		—		—		40
Payments to Class B noncontrolling interest investors	(10)		—		—		—		(10)
Balances, March 31, 2020	2,670		1,767		(130)		47		4,354
Related party note receivable	—		—		1		—		1
Net income (loss) attributable to NCI	53		(78)		97		6		78
Other comprehensive income	—		—		1		—		1
Related party contributions	—		—		—		2		2
Related party distributions	—		—		(67)		(2)		(69)
Differential membership investment contributions, net of distributions	—		(8)		—		—		(8)
Payments to Class B noncontrolling interest investors	(11)		—		—		—		(11)
Other	—		—		1		—		1
Balances, June 30, 2020	$	2,712	$	1,681	$	(97)	$	53	$	4,349

	Class B Noncontrolling Ownership Interests		Differential Membership Interests		NEER's Noncontrolling Ownership Interests in NEP OpCo and Silver State		Other Noncontrolling Ownership Interests		Total Noncontrolling Interests
Six months ended June 30, 2019	(millions)
Balances, December 31, 2018	$	751	$	2,019	$	342	$	80	$	3,192
Net income (loss) attributable to NCI	12		(60)		(50)		(7)		(105)
Other comprehensive loss	—		—		(3)		—		(3)
Related party contributions	—		—		1		—		1
Related party distributions	—		—		(50)		(1)		(51)
Changes in non-economic ownership interests	—		—		—		(6)		(6)
Differential membership investment 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		241		66		3,048
Sale of noncontrolling interest in a NEP OpCo subsidiary	893		—		—		—		893
Acquisition of subsidiaries with differential membership interests	—		—		472		—		472
Related party note receivable	—		—		1		—		1
Net income (loss) attributable to NCI	25		(63)		(59)		(5)		(102)
Related party contributions	—		—		11		—		11
Related party distributions	—		—		(54)		(2)		(56)
Differential membership investment contributions, net of distributions	—		(8)		—		—		(8)
Payments to Class B noncontrolling interest investors	(3)		—		—		—		(3)
Balances, June 30, 2019	$	1,673	$	1,912	$	612	$	59	$	4,256