Variable Interest Entities (VIEs) (Details) (USD $) In Millions, unless otherwise specified							3 Months Ended					3 Months Ended			3 Months Ended
	Mar. 31, 2013	Mar. 31, 2013 Other variable interest entities [Member]	Dec. 31, 2012 Other variable interest entities [Member]	Mar. 31, 2013 FPL [Member] Bankruptcy remote special purpose subsidiary [Member]	Dec. 31, 2012 FPL [Member] Bankruptcy remote special purpose subsidiary [Member]	Dec. 31, 2007 FPL [Member] Bankruptcy remote special purpose subsidiary [Member]	Mar. 31, 2013 FPL [Member] Qualifying facility 1 [Member] MWh MW	Mar. 31, 2012 FPL [Member] Qualifying facility 1 [Member] MWh	Mar. 31, 2013 FPL [Member] Qualifying facility 2 [Member] MW	Mar. 31, 2013 FPL [Member] Other variable interest entities [Member]	Dec. 31, 2012 FPL [Member] Other variable interest entities [Member]	Mar. 31, 2013 NextEra Energy Resources [Member]	Mar. 31, 2013 NextEra Energy Resources [Member] Gas and/or oil variable interest entities [Member] MW entities	Dec. 31, 2012 NextEra Energy Resources [Member] Gas and/or oil variable interest entities [Member]	Mar. 31, 2013 NextEra Energy Resources [Member] Wind variable interest entities [Member] MW	Dec. 31, 2012 NextEra Energy Resources [Member] Wind variable interest entities [Member]
Variable Interest Entity [Line Items]
Total number of consolidated variable interest entities	11											10	1		9
Storm-recovery bonds aggregate principal amount issued						$ 652
Proceeds from issuance of storm-recovery bonds						644
Carrying amount of assets, consolidated variable interest entity				332	366								94	90	4,600	4,600
Carrying amount of liabilities, consolidated variable interest entity				414	447								72	70	3,100	3,200
Coal fired generating facility capacity (in megawatts)							250		330
Quantity of electricity purchased (in megawatt-hours)							79,210	98,941
Cost of electricity purchased							35	40
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)															3,058
Total number of consolidated VIEs sell electric output under power sales contracts															8
Total number of consolidated VIEs sell in spot market															1
Investments in special purpose entities		$ 711	$ 753							$ 545	$ 583