Variable Interest Entities (Details) $ in Millions	12 Months Ended
	Dec. 31, 2015 USD ($) entities MW	Dec. 31, 2014 USD ($) entities	Dec. 31, 2007 USD ($)
Variable Interest Entity [Line Items]
Total number of consolidated variable interest entities (in entities)	24
Other variable interest entities [Member]
Variable Interest Entity [Line Items]
Investments in special purpose entities	$ 602	$ 716
FPL [Member] | Bankruptcy remote special purpose subsidiary [Member]
Variable Interest Entity [Line Items]
Storm-recovery bonds aggregate principal amount issued			$ 652
Proceeds from issuance of storm-recovery bonds			$ 644
Carrying amount of assets, consolidated variable interest entity	230	279
Carrying amount of liabilities, consolidated variable interest entity	$ 278	338
FPL [Member] | Qualifying facility 2 [Member]
Variable Interest Entity [Line Items]
Coal fired generating facility capacity (in megawatts) | MW	330
FPL [Member] | Other variable interest entities [Member]
Variable Interest Entity [Line Items]
Investments in special purpose entities	$ 476	606
NEER [Member]
Variable Interest Entity [Line Items]
Total number of consolidated variable interest entities (in entities) | entities	23
NEER [Member] | Gas and or Oil Variable Interest Entities [Member]
Variable Interest Entity [Line Items]
Total number of consolidated variable interest entities (in entities) | entities	1
NEER [Member] | Gas and/or oil variable interest entities [Member]
Variable Interest Entity [Line Items]
Carrying amount of assets, consolidated variable interest entity	$ 84	85
Carrying amount of liabilities, consolidated variable interest entity	$ 47	$ 55
Natural gas and or oil electric generating facility capacity (in megawatts) | MW	110
NEER [Member] | Wind variable interest entities [Member]
Variable Interest Entity [Line Items]
Total number of consolidated variable interest entities (in entities) | entities	20	16
Carrying amount of assets, consolidated variable interest entity	$ 7,600	$ 6,600
Carrying amount of liabilities, consolidated variable interest entity	$ 5,000	$ 4,100
Wind electric generating facility capability (in megawatts) | MW	5,272
Indirect Subsidiary of NextEra Energy Resources [Member] | Photovoltaic Solar Facility [Member]
Variable Interest Entity [Line Items]
Carrying amount of assets, consolidated variable interest entity	$ 657
Carrying amount of liabilities, consolidated variable interest entity	$ 626
Ownership percentage (in hundredths)	50.00%
Wind electric generating facility capability (in megawatts) | MW	277
Wind Electric Generating Facility Capability, Capacity Placed in Service | MW	153