Variable Interest Entities (VIEs) (Details) $ in Millions	3 Months Ended
	Mar. 31, 2016 USD ($) variable_interest_entity MW	Dec. 31, 2015 USD ($)	Dec. 31, 2007 USD ($)
Variable Interest Entity [Line Items]
Total number of consolidated variable interest entities | variable_interest_entity	26
Investment in subsidiaries	$ 0	$ 0
NEP OpCo [Member]
Variable Interest Entity [Line Items]
Carrying amount of assets, consolidated variable interest entity	6,700
Carrying amount of liabilities, consolidated variable interest entity	$ 4,900
Ownership percentage	70.80%
Other variable interest entities [Member]
Variable Interest Entity [Line Items]
Investments in special purpose entities	$ 2,272	602
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	195	230
Carrying amount of liabilities, consolidated variable interest entity	$ 241	278
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	$ 1,851	476
NextEra Energy Resources [Member]
Variable Interest Entity [Line Items]
Total number of consolidated variable interest entities | variable_interest_entity	24
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	2
Carrying amount of assets, consolidated variable interest entity	$ 92	84
Carrying amount of liabilities, consolidated variable interest entity	$ 51	47
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	20
Carrying amount of assets, consolidated variable interest entity	$ 7,600	7,600
Carrying amount of liabilities, consolidated variable interest entity	$ 4,200	5,000
Wind electric generating facility capability (in megawatts) | MW	5,272
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
NEECH [Member] | Special Purpose Entity that has Insufficient Equity at Risk [Member]
Variable Interest Entity [Line Items]
Carrying amount of assets, consolidated variable interest entity	$ 516
Carrying amount of liabilities, consolidated variable interest entity	501
Indirect Subsidiary of NextEra Energy Resources [Member] | Photovoltaic Solar Facility [Member]
Variable Interest Entity [Line Items]
Carrying amount of assets, consolidated variable interest entity	726	657
Carrying amount of liabilities, consolidated variable interest entity	$ 710	$ 626
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	237
Subsidiaries of NEE [Member]
Variable Interest Entity [Line Items]
Additional commitments to invest	$ 35
Other Investments [Member]
Variable Interest Entity [Line Items]
Investment in subsidiaries	$ 260