Debt (Details) (USD $)	1 Months Ended					12 Months Ended																12 Months Ended																																12 Months Ended							12 Months Ended								0 Months Ended		2 Months Ended
	Nov. 30, 2013	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013 FPL [Member]	Dec. 31, 2012 FPL [Member]	Dec. 31, 2013 FPL [Member] First mortgage bonds - maturing 2017 through 2042 - 2.75% to 6.20%	Dec. 31, 2012 FPL [Member] First mortgage bonds - maturing 2017 through 2042 - 2.75% to 6.20%	Dec. 31, 2013 FPL [Member] Storm-recovery bonds - maturing 2017 through 2021 - 5.0440% to 5.2555%		Dec. 31, 2012 FPL [Member] Storm-recovery bonds - maturing 2017 through 2021 - 5.0440% to 5.2555%		Dec. 31, 2013 FPL [Member] Pollution control, solid waste disposal and industrial development revenue bonds - maturing 2020 through 2029 - variable 0.07% and 0.16% weighted-average interest rates, respectively		Dec. 31, 2012 FPL [Member] Pollution control, solid waste disposal and industrial development revenue bonds - maturing 2020 through 2029 - variable 0.07% and 0.16% weighted-average interest rates, respectively		Dec. 31, 2013 FPL [Member] Other long-term debt [Member]		Dec. 31, 2012 FPL [Member] Other long-term debt [Member]		Dec. 31, 2013 Capital Holdings [Member]	Dec. 31, 2012 Capital Holdings [Member]	Dec. 31, 2013 Capital Holdings [Member] Debentures - maturing 2015 through 2023 - 1.2% to 7 7/8%		Dec. 31, 2012 Capital Holdings [Member] Debentures - maturing 2015 through 2023 - 1.2% to 7 7/8%		Dec. 31, 2013 Capital Holdings [Member] Debentures, related to NEE's equity units - maturing 2014 through 2018 - 1.339% to 1.90%		Dec. 31, 2012 Capital Holdings [Member] Debentures, related to NEE's equity units - maturing 2014 through 2018 - 1.339% to 1.90%		Dec. 31, 2013 Capital Holdings [Member] Junior subordinated debentures - maturing 2044 through 2073 - 5.00% to 8.75%	Dec. 31, 2012 Capital Holdings [Member] Junior subordinated debentures - maturing 2044 through 2073 - 5.00% to 8.75%	Dec. 31, 2013 Capital Holdings [Member] Senior secured bonds - maturing 2030 - 7.500%		Dec. 31, 2012 Capital Holdings [Member] Senior secured bonds - maturing 2030 - 7.500%		Dec. 31, 2013 Capital Holdings [Member] Japanese yen denominated senior notes - maturing 2030 - 5.1325%		Dec. 31, 2012 Capital Holdings [Member] Japanese yen denominated senior notes - maturing 2030 - 5.1325%		Dec. 31, 2013 Capital Holdings [Member] Japanese yen denominated term loans - maturing 2014 - variable, 1.45% and 1.56% weighted-average interest rate, respectively		Dec. 31, 2012 Capital Holdings [Member] Japanese yen denominated term loans - maturing 2014 - variable, 1.45% and 1.56% weighted-average interest rate, respectively		Dec. 31, 2013 Capital Holdings [Member] Term loans - maturing 2014 through 2018 - primarily variable, 1.27% and 1.30% weighted-average interest rate, respectively		Dec. 31, 2012 Capital Holdings [Member] Term loans - maturing 2014 through 2018 - primarily variable, 1.27% and 1.30% weighted-average interest rate, respectively		Dec. 31, 2013 Capital Holdings [Member] Fair value swaps (see Note 3)	Dec. 31, 2012 Capital Holdings [Member] Fair value swaps (see Note 3)	Dec. 31, 2013 NEER [Member]		Dec. 31, 2012 NEER [Member]		Dec. 31, 2013 NEER [Member] Senior secured limited-recourse bonds and notes - maturing 2017 through 2038 - 4.125% to 7.59%	Dec. 31, 2012 NEER [Member] Senior secured limited-recourse bonds and notes - maturing 2017 through 2038 - 4.125% to 7.59%	Dec. 31, 2013 NEER [Member] Senior secured limited-recourse term loans - maturing 2015 through 2031 - primarily variable, 3.15% and 2.77% weighted-average interest rate, respectively		Dec. 31, 2012 NEER [Member] Senior secured limited-recourse term loans - maturing 2015 through 2031 - primarily variable, 3.15% and 2.77% weighted-average interest rate, respectively		Dec. 31, 2013 NEER [Member] Senior secured limited-recourse term loans - maturing 2015 through 2031 - primarily variable, 3.15% and 2.77% weighted-average interest rate, respectively Great of Underlying Index or Floor, Plus a Margin [Member]	Dec. 31, 2013 NEER [Member] Other long-term debt [Member]		Dec. 31, 2012 NEER [Member] Other long-term debt [Member]		Dec. 31, 2013 NEER [Member] Canadian revolving credit facilities - maturing 2014 and 2016 - variable, 2.33% and 2.33% weighted-average interest rate, respectively		Dec. 31, 2012 NEER [Member] Canadian revolving credit facilities - maturing 2014 and 2016 - variable, 2.33% and 2.33% weighted-average interest rate, respectively		Jun. 01, 2012 NEE Equity Units 2009 [Member]	May 31, 2012 NEE Equity Units 2009 [Member]	Sep. 30, 2013 NEE Equity Units 2010 [Member]	Aug. 31, 2013 NEE Equity Units 2010 [Member]	Sep. 30, 2012 NEE Equity Units 2012 [Member]	May 31, 2012 NEE Equity Units 2012 [Member]	Sep. 30, 2013 NEE Equity Units 2013 [Member]	Dec. 31, 2013 Letter of Credit [Member]	Dec. 31, 2013 Letter of Credit [Member] FPL [Member]	Dec. 31, 2013 Letter of Credit [Member] Capital Holdings [Member]
Debt Instrument [Line Items]
Rate of interest on debentures before remarketing																																																																								1.90%
Rate of interest on debentures after remarketing																																																																						1.611%		1.339%
Interest rate terms						fixed	fixed	fixed		fixed		variable		variable		variable		variable				fixed		fixed		fixed		fixed		fixed	fixed	fixed		fixed		fixed		fixed		variable		variable		variable		variable								fixed	fixed	variable		variable			variable		variable		variable		variable
Interest rate, low range (in hundredths)						2.75%	2.75%	5.044%		5.044%												1.20%		1.20%		1.339%		1.339%		5.00%	5.00%																							4.125%	4.125%
Interest rate, high range (in hundredths)						6.20%	6.20%	5.2555%		5.2555%												7.88%		7.88%		1.90%		1.90%		8.75%	8.75%																							7.59%	7.59%
Interest rate (in hundredths)																																7.50%		7.50%		5.1325%		5.1325%																																			1.60%	1.70%	1.45%
Weighted-average interest rate (in hundredths)												0.07%		0.16%		0.66%		0.66%																						1.45%		1.56%		1.27%		1.30%										3.15%		2.77%			3.45%		2.83%		2.33%		2.33%
Long-term debt, gross						$ 7,490,000,000	$ 7,390,000,000	$ 386,000,000	[1]	$ 439,000,000	[1]	$ 633,000,000	[2],[3]	$ 633,000,000	[2],[3]	$ 355,000,000	[2]	$ 355,000,000	[2]			$ 2,550,000,000	[4]	$ 2,800,000,000	[4]	$ 2,503,000,000	[5]	$ 2,003,000,000	[5]	$ 3,353,000,000	$ 3,253,000,000	$ 500,000,000	[6]	$ 500,000,000	[6]	$ 95,000,000	[4]	$ 115,000,000	[4]	$ 419,000,000	[2],[4]	$ 508,000,000	[2],[4]	$ 1,815,000,000	[2]	$ 1,563,000,000	[2]	$ 4,000,000	$ 75,000,000					$ 2,523,000,000	$ 2,483,000,000	$ 3,874,000,000	[2],[4]	$ 2,617,000,000	[2],[4]	$ 1,100,000,000	$ 808,000,000	[2],[4],[7]	$ 836,000,000	[2],[4],[7]	$ 472,000,000	[2]	$ 413,000,000	[2]
Unamortized discount				(35,000,000)	(35,000,000)																																													(10,000,000)		0
Total long-term debt				8,829,000,000	8,782,000,000															11,239,000,000	10,817,000,000																													7,667,000,000		6,349,000,000
Less current maturities of long-term debt		3,766,000,000	2,771,000,000	356,000,000	453,000,000															1,469,000,000	1,575,000,000																													1,941,000,000	[7]	743,000,000	[7]
Long-term debt, excluding current maturities		23,969,000,000	23,177,000,000	8,473,000,000	8,329,000,000															9,770,000,000	9,242,000,000																													5,726,000,000		5,606,000,000
Minimum annual maturities of long-term debt [Abstract]
2014		3,766,000,000		356,000,000
2015		2,418,000,000		60,000,000
2016		1,782,000,000		64,000,000
2017		2,064,000,000		367,000,000
2018		1,369,000,000		72,000,000
Weighted-average interest rate of commercial paper and short-tem borrowings (in hundredths)		0.20%	0.49%	0.11%	0.27%
Lines of credit [Abstract]
Available lines of credit		7,900,000,000		3,000,000,000																4,900,000,000
Sale of equity units [Abstract]
Amount of equity units sold																																																																									650,000,000	600,000,000	500,000,000
Stated amount of each equity unit (in dollars per share)																																																																									$ 50	$ 50	$ 50
Undivided beneficial ownership interest per debenture (in hundredths)																																																																									5.00%	5.00%	5.00%
Principal amount of each debenture																																																																									1,000	1,000	1,000
Price per share of stock purchase contract - low range (in dollars per share)																																																																									$ 67.15	$ 64.35	$ 82.70
Price per share of stock purchase contract - high range (in dollars per share)																																																																									$ 80.58	$ 77.22	$ 99.24
Number Of Shares Subject To Antidilution Adjustments If Purchased On Final Settlement Date At Less Than Or Equal To Low Range Threshold																																																																									0.7468	0.7794	0.6046
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)																																																																									0.6223	0.6495	0.5038
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	20 days
Rate of total annual distributions on equity units (in hundredths)																																																																									5.889%	5.599%	5.799%
Rate of payments on stock purchase contracts (in hundredths)																																																																									4.289%	3.899%	4.349%
Debentures remarketed																																																																						350,000,000		402,400,000
Debt Instrument, Face Amount																																																																								402,500,000
Line of Credit Facility, Maximum Borrowing Capacity																																																																												6,600,000,000	2,500,000,000	4,100,000,000
Letters of Credit Outstanding, Amount				3,000,000																1,128,000,000
Stock sold during the period	4,500,000																																																																				5,400,500		5,946,530
Stock Issued During Period, Value, New Issues																																																																					$ 350,000,000		$ 402,500,000

[1] Principal on the storm-recovery bonds is due on the final maturity date (the date by which the principal must be repaid to prevent a default) for each tranche, however, it is being paid semiannually and sequentially.

[2] Variable rate is based on an underlying index plus a margin except for in 2013 approximately $1.1 billion of NEER's senior secured limited-recourse term loans is based on the greater of an underlying index or a floor, plus a margin

[3] Tax exempt bonds that permit individual bond holders to tender the bonds for purchase at any time prior to maturity. In the event bonds are tendered for purchase, they would be remarketed by a designated remarketing agent in accordance with the related indenture. If the remarketing is unsuccessful, FPL would be required to purchase the tax exempt bonds. As of December 31, 2013, all tax exempt bonds tendered for purchase have been successfully remarketed. FPL's bank revolving line of credit facilities are available to support the purchase of tax exempt bonds.

[4] Interest rate contracts, primarily swaps, have been entered into for the majority of these debt issuances. See Note 3.

[5] During 2013, the debentures maturing in 2015 and bearing interest at the rate of 1.90% were remarketed and the interest rate was reset to 1.339% per year. See discussion below.

[6] Issued by a wholly-owned subsidiary of NEECH and collateralized by a third-party note receivable held by that subsidiary. See Note 4 - Fair Value of Financial Instruments Recorded at the Carrying Amount.

[7] See Note 13 - Spain Solar Projects for discussion of events of default related to debt associated with the Spain solar projects.