Variable Interest Entities (Details) (USD $) In Millions, unless otherwise specified							12 Months Ended						12 Months Ended			12 Months Ended
	Dec. 31, 2013 entities	Dec. 31, 2013 Other variable interest entities [Member]	Dec. 31, 2012 Other variable interest entities [Member]	Dec. 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]	Dec. 31, 2013 FPL [Member] Qualifying facility 1 [Member] MW MWh	Dec. 31, 2012 FPL [Member] Qualifying facility 1 [Member] MWh	Dec. 31, 2011 FPL [Member] Qualifying facility 1 [Member] MWh	Dec. 31, 2013 FPL [Member] Qualifying facility 2 [Member] MW	Dec. 31, 2013 FPL [Member] Other variable interest entities [Member]	Dec. 31, 2012 FPL [Member] Other variable interest entities [Member]	Dec. 31, 2013 NEER [Member] entities	Dec. 31, 2013 NEER [Member] Gas and/or oil variable interest entities [Member] MW	Dec. 31, 2012 NEER [Member] Gas and/or oil variable interest entities [Member]	Dec. 31, 2013 NEER [Member] Wind variable interest entities [Member] MW entities	Dec. 31, 2012 NEER [Member] Wind variable interest entities [Member] entities
Variable Interest Entity [Line Items]
Total number of consolidated variable interest entities (in entities)	14												13			12	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				324	366									85	90	5,300	4,600
Carrying amount of liabilities, consolidated variable interest entity				394	447									63	70	3,300	3,200
Coal fired generating facility capacity (in megawatts)							250			330
Quantity of electricity purchased (in megawatt-hours)							784,155	680,500	1,188,649
Cost of electricity purchased							152	174	189
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		2038
Wind electric generating facility capability (in megawatts)																3,541
Total number of consolidated VIE's sell electric output under power sales contracts																10
Total number of consolidated VIEs sell in spot market																2
Investments in special purpose entities		$ 668	$ 753								$ 505	$ 583