Investments in Partnerships and Joint Ventures (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011		Dec. 31, 2010		Dec. 31, 2009	Dec. 31, 2004
Equity method investment, financial statement, reported amounts [Abstract]
NextEra Energy Resources' investment in partnerships and joint ventures	$ 193		$ 217
NextEra Energy Resources' ownership interest, low range (in hundredths)	5.50%
NextEra Energy Resources' ownership interest, high range (in hundredths)	50.00%
Equity method investment, summarized financial information [Abstract]
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	(19)	[1]	(26)	[1]
NEER's investment carrying amount for the principal operating entities	163		197
Revenues from services provided by certain subsidiaries to investee partnerships and joint ventures	26		25		21
Net receivables related to services provided and other payments made by certain subsidiaries on behalf of investees	19		36
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%
Maturity date of junior subordinated debentures						March 2044

[1] 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.