Variable Interest Entities - (Tables)

12 Months Ended

Dec. 31, 2017

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Equity Method Investments

Summarized information for this equity method investee is as follows:

	2017		2016
	(millions)
Current assets	$	135	$	291
Noncurrent assets	$	1,349	$	1,392
Current liabilities	$	64	$	64
Noncurrent liabilities	$	1,003	$	1,043
Revenues	$	207	$	211
Operating income	$	127	$	129
Net income	$	80	$	80
NEP's share of underlying equity in the equity method investee	$	208	$	288
Difference between investment carrying amount and underlying equity in net assets(a)	10		10
NEP's investment carrying amount	$	218	$	298

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(a) Substantially all of the difference between the investment carrying amount and the underlying equity in net assets is being amortized over the life of the related projects.