Investments in Partnerships and Joint Ventures (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2004	Dec. 31, 2013
Equity method investment, financial statement, reported amounts [Abstract]
Ownership interest in partnerships and joint ventures	$ 1,063	$ 663
NextEra Energy Resources' ownership interest, low range (in hundredths)	29.00%
NextEra Energy Resources' ownership interest, high range (in hundredths)	50.00%
Equity method investment, summarized financial information [Abstract]
Net income	$ 213	171
Total assets	3,339	2,636
Total liabilities	1,307	1,645
Partners'/members' equity	2,032	991
NEER's investment carrying amount for the principal entities	1,063	663		$ 422
Preferred trust securities [Abstract]
Proceeds from sale of preferred trust securities to the public			$ 300
Proceeds from sale of common trust securities to NextEra Energy			$ 9
Ownership interest in trust (in hundredths)			100.00%
Interest rate of junior subordinated debentures (in hundredths)			5.875%
NEER [Member]
Equity method investment, summarized financial information [Abstract]
NEER's share of underlying equity in the principal entities	874	495
Difference between investment carrying amount and underlying equity in net assets	(3)	(4)
NEER's investment carrying amount for the principal entities	$ 871	$ 491