Variable Interest Entities (Details) (USD $) In Millions, unless otherwise specified							12 Months Ended							1 Months Ended		12 Months Ended
	Dec. 31, 2011 entities	Dec. 31, 2011 Other variable interest entities [Member]	Dec. 31, 2010 Other variable interest entities [Member]	Dec. 31, 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]	Dec. 31, 2011 FPL [Member] Qualifying facility 1 [Member] MWh MW	Dec. 31, 2010 FPL [Member] Qualifying facility 1 [Member] MWh	Dec. 31, 2009 FPL [Member] Qualifying facility 1 [Member] MWh	Dec. 31, 2011 FPL [Member] Qualifying facility 2 [Member] MW	Dec. 31, 2011 NextEra Energy Resources [Member] entities	Dec. 31, 2011 NextEra Energy Resources [Member] Gas and/or oil variable interest entities [Member] MW entities	Dec. 31, 2010 NextEra Energy Resources [Member] Gas and/or oil variable interest entities [Member]	Nov. 30, 2011 NextEra Energy Resources [Member] Gas and/or oil variable interest entities, sold [Member] MW entities	Dec. 31, 2010 NextEra Energy Resources [Member] Gas and/or oil variable interest entities, sold [Member]	Dec. 31, 2011 NextEra Energy Resources [Member] Wind variable interest entities [Member] MW entities	Dec. 31, 2010 NextEra Energy Resources [Member] Wind variable interest entities [Member]
Variable Interest Entity [Line Items]
Total number of consolidated variable interest entities (in entities)	8										7	1		2		6
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				406	444							105	99		730	3,200	1,700
Carrying amount of liabilities, consolidated variable interest entity				496	542							82	82		373	2,600	1,600
Coal fired generating facility capacity (in megawatts)							250			330
Quantity of electricity purchased (in megawatt-hours)							1,188,649	1,502,234	1,604,735
Cost of electricity purchased							189	184	173
Ownership percentage (in hundredths)											100.00%
Natural gas and or oil electric generating facility capacity (in megawatts)												110		1,175
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)																1,916
Investments in special purpose entities		$ 668	$ 646