Variable Interest Entities (VIEs) (Details) (USD $) In Millions, unless otherwise specified					3 Months Ended		9 Months Ended									9 Months Ended
	Sep. 30, 2011	Sep. 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]	Sep. 30, 2011 FPL [Member] Qualifying facility 1 [Member] megawatt-hours	Sep. 30, 2010 FPL [Member] Qualifying facility 1 [Member] megawatt-hours	Sep. 30, 2011 FPL [Member] Qualifying facility 1 [Member] mW megawatt-hours	Sep. 30, 2010 FPL [Member] Qualifying facility 1 [Member] megawatt-hours	Sep. 30, 2011 FPL [Member] Qualifying facility 2 [Member] mW	Sep. 30, 2011 NextEra Energy Resources [Member]	Sep. 30, 2011 NextEra Energy Resources [Member] Gas and or Oil Variable Interest Entities [Member] mW	Sep. 30, 2011 NextEra Energy Resources [Member] Gas and/or oil variable interest entities, not held for sale [Member]	Dec. 31, 2010 NextEra Energy Resources [Member] Gas and/or oil variable interest entities, not held for sale [Member]	Sep. 30, 2011 NextEra Energy Resources [Member] Gas and/or oil variable interest entities, held for sale [Member]	Dec. 31, 2010 NextEra Energy Resources [Member] Gas and/or oil variable interest entities, held for sale [Member]	Sep. 30, 2011 NextEra Energy Resources [Member] Wind variable interest entities [Member] mi mW kv	Dec. 31, 2010 NextEra Energy Resources [Member] Wind variable interest entities [Member]	Sep. 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	9									8	3					5
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		396	444									101	99	759	730	2,900	1,700
Carrying amount of liabilities, consolidated variable interest entity		490	542									81	82	387	373	2,400	1,600
Coal fired generating facility capacity (in megawatts)							250		330
Quantity of electricity purchased (in megawatt-hours)					327,583	462,021	965,105	1,197,563
Cost of electricity purchased					50	49	144	140
Ownership percentage										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
Number of Variable Interest Entities to be Sold														2
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																		$ 680	$ 646