Variable Interest Entities (VIEs) (Details) $ in Millions	1 Months Ended	9 Months Ended
	Sep. 30, 2019 MW	Sep. 30, 2020 USD ($) variable_interest_entity entity mi MW	Dec. 31, 2019 USD ($) variable_interest_entity
Variable Interest Entity [Line Items]
Carrying amount of assets, consolidated variable interest entity		$ 126,382	$ 117,691
Investment in equity method investees		7,144	7,453
Other variable interest entities [Member]
Variable Interest Entity [Line Items]
Investments in special purpose entities		3,345	3,247
Variable Interest Entity, Primary Beneficiary [Member]
Variable Interest Entity [Line Items]
Carrying amount of assets, consolidated variable interest entity		345	173
Carrying amount of liabilities, consolidated variable interest entity		$ 69	29
Electricity Transmission Line (in miles) | mi		280
Percentage of profits and losses		50.00%
FPL [Member]
Variable Interest Entity [Line Items]
Carrying amount of assets, consolidated variable interest entity		$ 60,503	57,188
FPL [Member] | Other variable interest entities [Member]
Variable Interest Entity [Line Items]
Investments in special purpose entities		$ 2,822	2,717
NextEra Energy Resources [Member]
Variable Interest Entity [Line Items]
Total number of consolidated variable interest entities | variable_interest_entity		34
Wind electric generating facility capability (in megawatts) | MW	220
NextEra Energy Resources [Member] | Variable Interest Entities Gas And Oil Primary Beneficiary [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		$ 198	216
Carrying amount of liabilities, consolidated variable interest entity		$ 24	$ 25
Natural gas and or oil electric generating facility capacity (in megawatts) | MW		1,450
NextEra Energy Resources [Member] | Variable Interest Entities Wind and Solar Primary Beneficiary [Member] [Member]
Variable Interest Entity [Line Items]
Total number of consolidated variable interest entities | variable_interest_entity		28	26
Carrying amount of assets, consolidated variable interest entity		$ 11,800	$ 11,300
Carrying amount of liabilities, consolidated variable interest entity		$ 700	800
Solar generating facility capability (in MW) | MW		813
Wind electric generating facility capability (in megawatts) | MW		7,482
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		3
Carrying amount of assets, consolidated variable interest entity		$ 784	776
Carrying amount of liabilities, consolidated variable interest entity		$ 624	598
Ownership percentage		50.00%
Number of entities with ownership interest contributed | variable_interest_entity		5
Solar generating facility capability (in MW) | MW		409
Other Investments [Member] | Subsidiaries of NEE [Member]
Variable Interest Entity [Line Items]
Investment in equity method investees		$ 3,872	$ 4,254
Number of entities committed to invest in | entity		5