Variable Interest Entities (VIEs) (Details) (USD $) In Millions, unless otherwise specified							3 Months Ended		9 Months Ended					9 Months Ended			9 Months Ended
	Sep. 30, 2012	Sep. 30, 2012 Other variable interest entities [Member]	Dec. 31, 2011 Other variable interest entities [Member]	Sep. 30, 2012 FPL [Member] Bankruptcy remote special purpose subsidiary [Member]	Dec. 31, 2011 FPL [Member] Bankruptcy remote special purpose subsidiary [Member]	Dec. 31, 2007 FPL [Member] Bankruptcy remote special purpose subsidiary [Member]	Sep. 30, 2012 FPL [Member] Qualifying facility 1 [Member] MWh	Sep. 30, 2011 FPL [Member] Qualifying facility 1 [Member] MWh	Sep. 30, 2012 FPL [Member] Qualifying facility 1 [Member] MW MWh	Sep. 30, 2011 FPL [Member] Qualifying facility 1 [Member] MWh	Sep. 30, 2012 FPL [Member] Qualifying facility 2 [Member] MW	Sep. 30, 2012 FPL [Member] Other variable interest entities [Member]	Dec. 31, 2011 FPL [Member] Other variable interest entities [Member]	Sep. 30, 2012 NextEra Energy Resources [Member]	Sep. 30, 2012 NextEra Energy Resources [Member] Gas and/or oil variable interest entities [Member] MW entities	Dec. 31, 2011 NextEra Energy Resources [Member] Gas and/or oil variable interest entities [Member]	Sep. 30, 2012 NextEra Energy Resources [Member] Wind variable interest entities [Member] MW	Dec. 31, 2011 NextEra Energy Resources [Member] Wind variable interest entities [Member]
Variable Interest Entity [Line Items]
Total number of consolidated variable interest entities	10													9	1		8	6
Storm-recovery bonds aggregate principal amount issued						$ 652
Proceeds from issuance of storm-recovery bonds						644
Carrying amount of assets, consolidated variable interest entity				356	406										96	105	4,100	3,200
Carrying amount of liabilities, consolidated variable interest entity				441	496										74	82	2,800	2,600
Coal fired generating facility capacity (in megawatts)									250		330
Quantity of electricity purchased (in megawatt-hours)							293,650	327,583	582,661	965,105
Cost of electricity purchased							48	50	133	144
Ownership percentage														100.00%
Natural gas and or oil electric generating facility capacity (in megawatts)															110
Expiration date of power sales contracts with third parties, low range															2018		2018
Expiration date of power sales contracts with third parties, high range															2020		2037
Wind electric generating facility capability (in megawatts)																	2,658
Total number of consolidated VIEs sell electric output under power sales contracts																	7
Total number of consolidated VIEs sell in spot market																	1
Investments in special purpose entities		$ 784	$ 668									$ 619	$ 526