Investments in Partnerships and Joint Ventures (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2004	Dec. 31, 2014
Equity method investment, financial statement, reported amounts [Abstract]
Ownership interest in partnerships and joint ventures	$ 1,767	$ 1,063
NextEra Energy Resources' ownership interest, low range (in hundredths)	31.00%
NextEra Energy Resources' ownership interest, high range (in hundredths)	50.00%
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%
Equity method investment, summarized financial information [Abstract]
Net income	$ 264	213
Total assets	4,502	3,339
Total liabilities	1,364	1,307
Partners'/members' equity	3,138	2,032
NEER's investment carrying amount for the principal entities	1,767	1,063		$ 663
NEER [Member]
Equity method investment, summarized financial information [Abstract]
NEER's share of underlying equity in the principal entities	1,423	874
Difference between investment carrying amount and underlying equity in net assets	65	(3)
NEER's investment carrying amount for the principal entities	$ 1,488	$ 871