Debt (Narrative) (Details) (USD $)	1 Months Ended	0 Months Ended			2 Months Ended	0 Months Ended
	Nov. 30, 2013	Sep. 30, 2012	May 31, 2012	Jun. 01, 2012	Sep. 30, 2013	Sep. 30, 2013	Dec. 31, 2014	Dec. 31, 2013	Aug. 31, 2013
Debt Instrument [Line Items]
Weighted-average interest rate of commercial paper and short-tem borrowings (in hundredths)							0.40%	0.20%
Available lines of credit							$ 7,900,000,000
Sale of equity units [Abstract]
Issuances of common stock, net of issuance cost (in shares)	4,500,000
FPL [Member]
Debt Instrument [Line Items]
Weighted-average interest rate of commercial paper and short-tem borrowings (in hundredths)							0.40%	0.11%
Available lines of credit							3,000,000,000
Letters of Credit Outstanding, Amount							3,000,000
Capital Holdings [Member]
Debt Instrument [Line Items]
Available lines of credit							4,900,000,000
Letters of Credit Outstanding, Amount							843,000,000
Letter of Credit [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity							6,600,000,000
Letter of Credit [Member] | FPL [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity							2,500,000,000
Letter of Credit [Member] | Capital Holdings [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity							4,100,000,000
NEE Equity Units 2012 [Member]
Sale of equity units [Abstract]
Amount of equity units sold		650,000,000	600,000,000
Stated amount of each equity unit (in dollars per share)		$ 50	$ 50
Undivided beneficial ownership interest per debenture (in hundredths)		5.00%	5.00%
Principal amount of each debenture		1,000	1,000
Price per share of stock purchase contract - low range (in dollars per share)		$ 67.15	$ 64.35
Price per share of stock purchase contract - high range (in dollars per share)		$ 80.58	$ 77.22
Number Of Shares Subject To Antidilution Adjustments If Purchased On Final Settlement Date At Less Than Or Equal To Low Range Threshold		0.7507	0.7835
Number of shares (subject to antidilution adjustments) if purchased on the final settlement date at equal to or greater than high range threshold (in shares)		0.6256	0.6529
Trading period (in days) over which the market value is determined by reference to the average closing prices of the common stock		20 days	20 days
Rate of total annual distributions on equity units (in hundredths)		5.889%	5.599%
Interest rate		1.60%	1.70%
Rate of payments on stock purchase contracts (in hundredths)		4.289%	3.899%
NEE Equity Units 2009 [Member]
Sale of equity units [Abstract]
Debentures remarketed			350,000,000
Rate of interest on debentures after remarketing			1.611%
Issuances of common stock, net of issuance cost (in shares)				5,400,500
Issuances of common stock				350,000,000
NEE Equity Units 2010 [Member]
Sale of equity units [Abstract]
Debentures remarketed									402,400,000
Debt Instrument, Face Amount									402,500,000
Rate of interest on debentures after remarketing									1.339%
Issuances of common stock, net of issuance cost (in shares)					5,946,530
Issuances of common stock					402,500,000
NEE Equity Units 2013 [Member]
Sale of equity units [Abstract]
Amount of equity units sold					500,000,000	500,000,000
Stated amount of each equity unit (in dollars per share)					$ 50	$ 50
Undivided beneficial ownership interest per debenture (in hundredths)					5.00%	5.00%
Principal amount of each debenture					$ 1,000	$ 1,000
Price per share of stock purchase contract - low range (in dollars per share)					$ 82.70	$ 82.70
Price per share of stock purchase contract - high range (in dollars per share)					$ 99.24	$ 99.24
Number Of Shares Subject To Antidilution Adjustments If Purchased On Final Settlement Date At Less Than Or Equal To Low Range Threshold					0.6062	0.6062
Number of shares (subject to antidilution adjustments) if purchased on the final settlement date at equal to or greater than high range threshold (in shares)					0.5051	0.5051
Trading period (in days) over which the market value is determined by reference to the average closing prices of the common stock						20 days
Rate of total annual distributions on equity units (in hundredths)					5.799%	5.799%
Interest rate					1.45%	1.45%
Rate of payments on stock purchase contracts (in hundredths)					4.349%	4.349%