Variable Interest Entities (VIEs) (Details) (USD $) In Millions, unless otherwise specified					3 Months Ended		6 Months Ended						6 Months Ended
	Jun. 30, 2011	Jun. 30, 2011 FPL [Member] Bankruptcy remote special purpose subsidiary [Member]	Dec. 31, 2010 FPL [Member] Bankruptcy remote special purpose subsidiary [Member]	Dec. 31, 2007 FPL [Member] Bankruptcy remote special purpose subsidiary [Member]	Jun. 30, 2011 FPL [Member] Qualifying facility 1 [Member] mWh	Jun. 30, 2010 FPL [Member] Qualifying facility 1 [Member] mWh	Jun. 30, 2011 FPL [Member] Qualifying facility 1 [Member] mWh mW	Jun. 30, 2010 FPL [Member] Qualifying facility 1 [Member] mWh	Jun. 30, 2011 FPL [Member] Qualifying facility 2 [Member] mW	Jun. 30, 2011 NextEra Energy Resources [Member]	Jun. 30, 2011 NextEra Energy Resources [Member] Gas and/or oil variable interest entities [Member] mW	Dec. 31, 2010 NextEra Energy Resources [Member] Gas and/or oil variable interest entities [Member]	Jun. 30, 2011 NextEra Energy Resources [Member] Wind variable interest entities [Member] Mi mW	Dec. 31, 2010 NextEra Energy Resources [Member] Wind variable interest entities [Member]	Jun. 30, 2011 Other variable interest entities [Member]	Dec. 31, 2010 Other variable interest entities [Member]
Variable Interest Entity [Line Items]
Total number of consolidated variable interest entities	10									8	3		5	3	1
Storm-recovery bonds aggregate principal amount issued				$ 652
Storm and property insurance reserve				200
Proceeds from issuance of storm-recovery bonds				644
Carrying amount of assets, consolidated variable interest entity		421	444								819	829	2,900	1,700	55	53
Carrying amount of liabilities, consolidated variable interest entity		518	542								463	455	2,300	1,600
Coal fired generating facility capacity (in megawatts)							250		330
Quantity of electricity purchased (in megawatt-hours)					380,847	373,152	637,522	735,542
Cost of electricity purchased					51	46	94	91
Ownership percentage (in hundredths)										100.00%
Natural gas and or oil electric generating facility capacity (in megawatts)											1,285
Expiration date of power sales contracts with third parties, low range											2018		2018
Expiration date of power sales contracts with third parties, high range											2022		2034
Wind electric generating facility capability (in megawatts)													1,710
Length of transmission line (in miles)													78
Capacity of transmission line (in kilovolts)													230
Investments in special purpose entities															$ 689	$ 646