Variable Interest Entities (VIEs) (Details) (USD $) In Millions, unless otherwise specified							3 Months Ended						3 Months Ended
	Mar. 31, 2012	Mar. 31, 2012 Other variable interest entities [Member]	Dec. 31, 2011 Other variable interest entities [Member]	Mar. 31, 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]	Mar. 31, 2012 FPL [Member] Qualifying facility 1 [Member] MWh MW	Mar. 31, 2011 FPL [Member] Qualifying facility 1 [Member] MWh	Mar. 31, 2012 FPL [Member] Qualifying facility 2 [Member] MW	Mar. 31, 2012 NextEra Energy Resources [Member]	Mar. 31, 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]	Mar. 31, 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	9									8	1		7	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				375	406						101	105	4,100	3,200
Carrying amount of liabilities, consolidated variable interest entity				464	496						77	82	2,800	2,600
Coal fired generating facility capacity (in megawatts)							250		330
Quantity of electricity purchased (in megawatt-hours)							98,941	256,675
Cost of electricity purchased							40	43
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)													2,579
Total number of consolidated VIE's sell electric output under power sales contracts													6
Total number of consolidated VIEs sell in spot market													1
Investments in special purpose entities		$ 683	$ 668