Variable Interest Entities (Details) (USD $) In Millions, unless otherwise specified							12 Months Ended						12 Months Ended			12 Months Ended
	Dec. 31, 2012 entities	Dec. 31, 2012 Other variable interest entities [Member]	Dec. 31, 2011 Other variable interest entities [Member]	Dec. 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]	Dec. 31, 2012 FPL [Member] Qualifying facility 1 [Member] MW MWh	Dec. 31, 2011 FPL [Member] Qualifying facility 1 [Member] MWh	Dec. 31, 2010 FPL [Member] Qualifying facility 1 [Member] MWh	Dec. 31, 2012 FPL [Member] Qualifying facility 2 [Member] MW	Dec. 31, 2012 FPL [Member] Other variable interest entities [Member]	Dec. 31, 2011 FPL [Member] Other variable interest entities [Member]	Dec. 31, 2012 NextEra Energy Resources [Member] entities	Dec. 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]	Dec. 31, 2012 NextEra Energy Resources [Member] Wind variable interest entities [Member] MW entities	Dec. 31, 2011 NextEra Energy Resources [Member] Wind variable interest entities [Member] entities
Variable Interest Entity [Line Items]
Total number of consolidated variable interest entities (in entities)	10												10	1		9	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				366	406									90	105	4,600	3,200
Carrying amount of liabilities, consolidated variable interest entity				447	496									70	82	3,200	2,600
Coal fired generating facility capacity (in megawatts)							250			330
Quantity of electricity purchased (in megawatt-hours)							680,500	1,188,649	1,502,234
Cost of electricity purchased							174	189	184
Ownership percentage (in hundredths)													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)																3,058
Total number of consolidated VIE's sell electric output under power sales contracts																8
Total number of consolidated VIEs sell in spot market																1
Investments in special purpose entities		$ 753	$ 668								$ 583	$ 526