Variable Interest Entities (VIEs) (Details) (USD $) In Millions, unless otherwise specified								3 Months Ended		9 Months Ended					9 Months Ended			9 Months Ended
	Sep. 30, 2014	Sep. 30, 2014 Other variable interest entities [Member]	Dec. 31, 2013 Other variable interest entities [Member]	Sep. 30, 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]	Sep. 30, 2014 FPL [Member] Variable Interest Entity, Primary Beneficiary [Member]	Sep. 30, 2014 FPL [Member] Qualifying facility 1 [Member] MWh	Sep. 30, 2013 FPL [Member] Qualifying facility 1 [Member] MWh	Sep. 30, 2014 FPL [Member] Qualifying facility 1 [Member] MWh MW	Sep. 30, 2013 FPL [Member] Qualifying facility 1 [Member] MWh	Sep. 30, 2014 FPL [Member] Qualifying facility 2 [Member] MW	Sep. 30, 2014 FPL [Member] Other variable interest entities [Member]	Dec. 31, 2013 FPL [Member] Other variable interest entities [Member]	Sep. 30, 2014 NextEra Energy Resources [Member]	Sep. 30, 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]	Sep. 30, 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	15														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				271	324		200									91	85	5,100	5,300
Carrying amount of liabilities, consolidated variable interest entity				334	394											60	63	3,100	3,300
Coal fired generating facility capacity (in megawatts)										250		330
Quantity of electricity purchased (in megawatt-hours)								321,038	287,029	696,522	568,897
Cost of electricity purchased								43	41	119	114
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		$ 611	$ 668										$ 499	$ 505