Debt (Narrative) (Details) (USD $)	2 Months Ended
	Sep. 30, 2013	Aug. 31, 2013
NEE Equity Units 2013 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	1.45%
Amount Of Equity Units Sold	$ 500,000,000
Undivided Beneficial Ownership Interest Per Debenture	5.00%
Stated Amount Of Each Equity Unit	$ 50
Principal Amount Of Each Debenture	1,000
Price Per Share Of Stock Purchase Contract Low Range	$ 82.70
Price Per Share Of Stock Purchase Contract High Range	$ 99.24
Number Of Shares Subject To Antidilution Adjustments If Purchased On Final Settlement Date At Less Than Or Equal To Low Range Threshold	0.6046
Number Of Shares Subject To Antidilution Adjustments If Purchased On Final Settlement Date At Equal To Or Greater Than High Range Threshold	0.5038
Trading Period Over Which Market Value Is Determined By Reference To Average Closing Prices Of Common Stock	20 days
Rate Of Total Annual Distributions On Equity Units	5.799%
Rate Of Payments On Stock Purchase Contracts	4.349%
NEE Equity Units 2010 [Member]
Debt Instrument [Line Items]
Debentures remarketed		402,400,000
Principal Amount		402,500,000
Debt Instrument, Interest Rate, Stated Percentage		1.339%
Stock Issued During Period, Shares, New Issues	5,946,530
Stock Issued During Period, Value, New Issues	$ 402,500,000