Debt (Details) (USD $)					12 Months Ended				12 Months Ended														12 Months Ended																																12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009	Feb. 09, 2012 Refinanced credit facilities [Member]	Dec. 31, 2010 Equity Units Contract 1 [Member]	Dec. 31, 2009 Equity Units Contract 2 [Member]	Dec. 31, 2011 FPL [Member]	Dec. 31, 2010 FPL [Member]	Dec. 31, 2011 FPL [Member] First mortgage bonds [Member]	Dec. 31, 2010 FPL [Member] First mortgage bonds [Member]	Dec. 31, 2011 FPL [Member] Storm-recovery bonds [Member]		Dec. 31, 2010 FPL [Member] Storm-recovery bonds [Member]		Dec. 31, 2011 FPL [Member] Pollution control, solid waste disposal and industrial development revenue bonds [Member]		Dec. 31, 2010 FPL [Member] Pollution control, solid waste disposal and industrial development revenue bonds [Member]		Dec. 31, 2011 FPL [Member] Other long-term debt [Member]	Dec. 31, 2010 FPL [Member] Other long-term debt [Member]	Dec. 31, 2011 Capital Holdings [Member]	Dec. 31, 2010 Capital Holdings [Member]	Dec. 31, 2011 Capital Holdings [Member] Debentures 1 [Member]		Dec. 31, 2010 Capital Holdings [Member] Debentures 1 [Member]		Dec. 31, 2011 Capital Holdings [Member] Debentures 2 [Member]		Dec. 31, 2010 Capital Holdings [Member] Debentures 2 [Member]		Dec. 31, 2011 Capital Holdings [Member] Debentures, related to NextEra Energy's equity units [Member]	Dec. 31, 2010 Capital Holdings [Member] Debentures, related to NextEra Energy's equity units [Member]	Dec. 31, 2011 Capital Holdings [Member] Junior Subordinated Debentures [Member]	Dec. 31, 2010 Capital Holdings [Member] Junior Subordinated Debentures [Member]	Dec. 31, 2011 Capital Holdings [Member] Senior secured bonds [Member]		Dec. 31, 2010 Capital Holdings [Member] Senior secured bonds [Member]		Dec. 31, 2011 Capital Holdings [Member] Japanese yen denominated senior notes [Member]		Dec. 31, 2010 Capital Holdings [Member] Japanese yen denominated senior notes [Member]		Dec. 31, 2011 Capital Holdings [Member] Japanese yen denominated term loans [Member]		Dec. 31, 2010 Capital Holdings [Member] Japanese yen denominated term loans [Member]		Dec. 31, 2011 Capital Holdings [Member] Term loans [Member]		Dec. 31, 2010 Capital Holdings [Member] Term loans [Member]		Dec. 31, 2011 Capital Holdings [Member] Fair value swap [Member]	Dec. 31, 2010 Capital Holdings [Member] Fair value swap [Member]	Dec. 31, 2011 NextEra Energy Resources [Member]	Dec. 31, 2010 NextEra Energy Resources [Member]	Dec. 31, 2011 NextEra Energy Resources [Member] Senior secured limited recourse bonds and notes [Member]	Dec. 31, 2010 NextEra Energy Resources [Member] Senior secured limited recourse bonds and notes [Member]	Dec. 31, 2011 NextEra Energy Resources [Member] Other long-term debt [Member]		Dec. 31, 2010 NextEra Energy Resources [Member] Other long-term debt [Member]		Dec. 31, 2011 NextEra Energy Resources [Member] Canadian revolving credit facility [Member]		Dec. 31, 2010 NextEra Energy Resources [Member] Canadian revolving credit facility [Member]
Debt Instrument [Line Items]
Maturity date, low range									2013	2013	2013		2013		2020		2020		2012	2012			2013		2013		2012		2012		2014	2014	2044	2044													2012		2012						2013	2013	2012		2012
Maturity date, high range									2042	2042	2021		2021		2029		2029		2040	2040			2021		2021						2015	2015	2069	2069													2016		2016						2038	2038	2030		2030
Maturity date																																			2030		2030		2030		2030		2014		2011																2013		2013
Interest rate terms									fixed	fixed	fixed		fixed		variable		variable		fixed	fixed			fixed		fixed		variable		variable		fixed	fixed	fixed	fixed	fixed		fixed		fixed		fixed		variable		variable		variable		variable						fixed	fixed	variable		variable		variable		variable
Interest rate, low range (in hundredths)									4.125%	4.125%	5.044%		5.044%						4.00%	4.00%			2.55%		2.55%						3.60%	1.90%	5.875%	5.875%																					4.125%	4.125%
Interest rate, high range (in hundredths)									6.20%	6.20%	5.2555%		5.2555%						5.25%	5.25%			7.875%		7.875%								8.75%	8.75%																					7.59%	7.59%
Interest rate (in hundredths)																																			7.50%		7.50%		5.1325%		5.1325%
Weighted-average interest rate (in hundredths)															0.10%		0.30%										0.77%		1.00%														1.90%		2.20%		1.39%		1.20%								2.60%		2.60%		1.30%		1.30%
Long-term debt, gross									$ 6,390,000,000	$ 5,540,000,000	$ 487,000,000	[1]	$ 531,000,000	[1]	$ 633,000,000	[2]	$ 633,000,000	[2]	$ 57,000,000	$ 57,000,000			$ 2,300,000,000	[3]	$ 2,500,000,000	[3]	$ 200,000,000	[4]	$ 450,000,000	[4]	$ 753,000,000	$ 753,000,000	$ 2,353,000,000	$ 2,353,000,000	$ 500,000,000	[5]	$ 500,000,000	[5]	$ 130,000,000	[3]	$ 123,000,000	[3]	$ 442,000,000	[3],[4]	$ 327,000,000	[3],[4]	$ 1,533,000,000	[4]	$ 950,000,000	[4]	$ 32,000,000	$ 3,000,000			$ 3,147,000,000	$ 2,652,000,000	$ 2,529,000,000	[3],[4]	$ 2,521,000,000	[3],[4]	$ 172,000,000	[4]	$ 82,000,000	[4]
Unamortized discount							(34,000,000)	(34,000,000)													(6,000,000)	(8,000,000)
Total long-term debt							7,533,000,000	6,727,000,000													8,237,000,000	7,951,000,000																															5,848,000,000	5,255,000,000
Less current maturities of long-term debt	808,000,000	1,920,000,000					50,000,000	45,000,000													350,000,000	1,485,000,000																															408,000,000	390,000,000
Long-term debt, excluding current maturities	20,810,000,000	18,013,000,000					7,483,000,000	6,682,000,000													7,887,000,000	6,466,000,000																															5,440,000,000	4,865,000,000
Minimum annual maturities of long-term debt [Abstract]
2012	808,000,000
2013	2,435,000,000
2014	1,974,000,000
2015	1,837,000,000
2016	695,000,000
Weighted-average interest rate of commercial paper borrowings (in hundredths)	0.48%	0.39%
Lines of credit [Abstract]
Available lines of credit	7,400,000,000						3,000,000,000														4,400,000,000
Maximum letters of credit provided by lines of credit	6,400,000,000
Letters of credit outstanding under credit facilities							34,000,000														1,238,000,000
Letters of credit issuable, percentage	100.00%			50.00%
WCEC reclaimed water agreement [Abstract]
Principal amount of Palm Beach County, Florida (PBC) Water and Sewer Revenue Bonds			68,000,000
Sale of equity units [Abstract]
Date of equity units sold					2010	2009
Amount of equity units sold					402,500,000	350,000,000
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
Date by which equity unit holder must complete stock purchase					Sep. 01, 2013	Jun. 01, 2012
Price per share of stock purchase contract - low range (in dollars per share)					$ 55.02	$ 55.67
Price per share of stock purchase contract - high range (in dollars per share)					$ 68.78	$ 66.80
Number of shares (subject to antidilution adjustments) if purchased on the final settlement date at less than or equal to low range threshold (in shares)					0.9121	0.9051
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)					0.7296	0.7544
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
Last day of trading period over which market value Is determined by reference to average closing prices of common stock					Aug. 28, 2013	May 29, 2012
Rate of total annual distributions on equity units (in hundredths)					7.00%	8.375%
Rate of total annual distributions on debentures (in hundredths)					1.90%	3.60%
Rate of payments on stock purchase contracts (in hundredths)					5.10%	4.775%
Date interest rate on debentures expected to be reset					March 1, 2013	May 2012

[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 began being paid semiannually and sequentially on February 1, 2008, when the first semiannual interest payment became due.

[2] 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, 2011, all tax exempt bonds tendered for purchase have been successfully remarketed. FPL's bank revolving lines of credit are available to support the purchase of tax exempt bonds.

[3] Interest rate swap agreements have been entered into for the majority of these debt issuances.

[4] Variable rate is based on an underlying index plus a margin.

[5] Issued by a wholly-owned subsidiary of NEECH and collateralized by a third-party note receivable held by that subsidiary. See Note 5.