Variable Interest Entities (VIEs) (Details) $ in Millions	9 Months Ended
	Sep. 30, 2015 USD ($) variable_interest_entity MW	Dec. 31, 2014 USD ($) variable_interest_entity	Dec. 31, 2007 USD ($)
Variable Interest Entity [Line Items]
Total number of consolidated variable interest entities | variable_interest_entity	20
Other variable interest entities [Member]
Variable Interest Entity [Line Items]
Investments in special purpose entities	$ 612	$ 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	224	279
Carrying amount of liabilities, consolidated variable interest entity	$ 275	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	$ 502	606
NextEra Energy Resources [Member]
Variable Interest Entity [Line Items]
Total number of consolidated variable interest entities | variable_interest_entity	19
NextEra Energy Resources [Member] | Gas and/or oil variable interest entities [Member]
Variable Interest Entity [Line Items]
Total number of consolidated variable interest entities | variable_interest_entity	1
Carrying amount of assets, consolidated variable interest entity	$ 91	85
Carrying amount of liabilities, consolidated variable interest entity	$ 52	$ 55
Natural gas and or oil electric generating facility capacity (in megawatts) | MW	110
NextEra Energy Resources [Member] | Wind variable interest entities [Member]
Variable Interest Entity [Line Items]
Total number of consolidated variable interest entities | variable_interest_entity	16
Carrying amount of assets, consolidated variable interest entity	$ 6,400	$ 6,600
Carrying amount of liabilities, consolidated variable interest entity	$ 3,700	$ 4,100
Wind electric generating facility capability (in megawatts) | MW	4,490
NextEra Energy Resources [Member] | Solar Variable Interest Entities [Member]
Variable Interest Entity [Line Items]
Total number of consolidated variable interest entities | variable_interest_entity	2
Indirect Subsidiary of NextEra Energy Resources [Member] | Photovoltaic Solar Facility [Member]
Variable Interest Entity [Line Items]
Carrying amount of assets, consolidated variable interest entity	$ 507
Carrying amount of liabilities, consolidated variable interest entity	$ 477
Ownership percentage	50.00%
Wind electric generating facility capability (in megawatts) | MW	277
Wind electric generating facility capability, capacity placed in service (in megawatts) | MW	95