Variable Interest Entities (VIEs) (Details) (USD $) In Millions, unless otherwise specified							3 Months Ended					3 Months Ended			3 Months Ended
	Mar. 31, 2014	Mar. 31, 2014 Other variable interest entities [Member]	Dec. 31, 2013 Other variable interest entities [Member]	Mar. 31, 2014 FPL [Member] Bankruptcy remote special purpose subsidiary [Member]	Dec. 31, 2013 FPL [Member] Bankruptcy remote special purpose subsidiary [Member]	Dec. 31, 2007 FPL [Member] Bankruptcy remote special purpose subsidiary [Member]	Mar. 31, 2014 FPL [Member] Qualifying facility 1 [Member] MWh MW	Mar. 31, 2013 FPL [Member] Qualifying facility 1 [Member] MWh	Mar. 31, 2014 FPL [Member] Qualifying facility 2 [Member] MW	Mar. 31, 2014 FPL [Member] Other variable interest entities [Member]	Dec. 31, 2013 FPL [Member] Other variable interest entities [Member]	Mar. 31, 2014 NextEra Energy Resources [Member]	Mar. 31, 2014 NextEra Energy Resources [Member] Gas and/or oil variable interest entities [Member] MW entities	Dec. 31, 2013 NextEra Energy Resources [Member] Gas and/or oil variable interest entities [Member]	Mar. 31, 2014 NextEra Energy Resources [Member] Wind variable interest entities [Member] MW entities	Dec. 31, 2013 NextEra Energy Resources [Member] Wind variable interest entities [Member]
Variable Interest Entity [Line Items]
Total number of consolidated variable interest entities	14											13	1		12	12
Storm-recovery bonds aggregate principal amount issued						$ 652
Proceeds from issuance of storm-recovery bonds						644
Carrying amount of assets, consolidated variable interest entity				290	324								90	85	5,200	5,300
Carrying amount of liabilities, consolidated variable interest entity				360	394								65	63	3,300	3,300
Coal fired generating facility capacity (in megawatts)							250		330
Quantity of electricity purchased (in megawatt-hours)							128,940	79,210
Cost of electricity purchased							36	35
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		2038
Wind electric generating facility capability (in megawatts)															3,541
Total number of consolidated VIEs sell electric output under power sales contracts															10
Total number of consolidated VIEs sell in spot market															2
Investments in special purpose entities		$ 700	$ 668							$ 541	$ 505