Investments in Partnerships and Joint Ventures (Tables)

12 Months Ended

Dec. 31, 2011

Investments in Partnerships and Joint Ventures [Abstract]

Summarized combined information for principal operating entities

Summarized combined information for these principal operating entities is as follows:

	2011			2010
	(millions)
Net income	$	72		$	81
Total assets	$	873		$	660
Total liabilities	$	508		$	210
Partners'/members' equity	$	365		$	450
NEER's share of underlying equity in the principal operating entities	$	182		$	223
Difference between investment carrying amount and underlying equity in net assets(a)	(19		)	(26		)
NEER's investment carrying amount for the principal operating entities	$	163		$	197

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(a) The majority of the difference between the investment carrying amount and the underlying equity in net assets is being amortized over the remaining life of the investee's assets.