Variable Interest Entities (VIEs) (Details) $ in Millions	6 Months Ended	12 Months Ended
	Jun. 30, 2016 USD ($) variable_interest_entity MW	Dec. 31, 2007 USD ($)	Dec. 31, 2015 USD ($) variable_interest_entity
Variable Interest Entity [Line Items]
Total number of consolidated variable interest entities | variable_interest_entity	28
Investment in subsidiaries	$ 0		$ 0
NEP OpCo [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	$ 6,700
Carrying amount of liabilities, consolidated variable interest entity	5,000
Other variable interest entities [Member]
Variable Interest Entity [Line Items]
Investments in special purpose entities	2,368		602
FPL [Member] | Bankruptcy remote special purpose subsidiary [Member]
Variable Interest Entity [Line Items]
Carrying amount of assets, consolidated variable interest entity	200		230
Carrying amount of liabilities, consolidated variable interest entity	$ 245		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	$ 1,937		476
NextEra Energy Resources [Member]
Variable Interest Entity [Line Items]
Total number of consolidated variable interest entities | variable_interest_entity	26
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	$ 87		84
Carrying amount of liabilities, consolidated variable interest entity	$ 47		$ 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	22		20
Carrying amount of assets, consolidated variable interest entity	$ 7,900		$ 7,600
Carrying amount of liabilities, consolidated variable interest entity	$ 4,300		5,000
Wind electric generating facility capability (in megawatts) | MW	5,522
Solar Generating Facility Capability | MW	178
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	$ 501
Carrying amount of liabilities, consolidated variable interest entity	$ 511
Indirect Subsidiary of NextEra Energy Resources [Member] | Photovoltaic Solar Facility [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	$ 760		657
Carrying amount of liabilities, consolidated variable interest entity	$ 696		$ 626
Ownership percentage	50.00%
Solar Generating Facility Capability | MW	277
Subsidiaries of NEE [Member]
Variable Interest Entity [Line Items]
Additional commitments to invest	$ 35
Additional VIEs committed to invest in | variable_interest_entity	2
Other Investments [Member]
Variable Interest Entity [Line Items]
Investment in subsidiaries	$ 245
Senior Secured Debt [Member] | 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
NEP OpCo [Member]
Variable Interest Entity [Line Items]
Ownership percentage	70.60%