Investments in Partnerships and Joint Ventures (Tables)

12 Months Ended

Dec. 31, 2017

Investments in Partnerships and Joint Ventures [Abstract]

Summarized combined information for principal operating entities

Summarized combined information for these principal entities is as follows:

	2017		2016
	(millions)
Net income	$	358	$	264
Total assets	$	6,001	$	4,502
Total liabilities	$	1,217	$	1,364
Partners'/members' equity	$	4,784	$	3,138
NEER's share of underlying equity in the principal entities	$	2,024	$	1,423
Difference between investment carrying amount and underlying equity in net assets(a)	105		65
NEER's investment carrying amount for the principal entities	$	2,129	$	1,488

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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 a 25-year period.