Variable Interest Entities (VIEs) (Details) $ in Millions	3 Months Ended
	Mar. 31, 2021 USD ($) variable_interest_entity entity mi MW	Dec. 31, 2020 USD ($)
Variable Interest Entity [Line Items]
Carrying amount of assets, consolidated variable interest entity	$ 132,441	$ 127,684
Carrying amount of liabilities, consolidated variable interest entity	86,711	82,755
Investment in equity method investees	$ 6,049	5,728
NEER Segment
Variable Interest Entity [Line Items]
Total number of consolidated variable interest entities | variable_interest_entity	40
Other variable interest entities [Member]
Variable Interest Entity [Line Items]
Investments in special purpose entities	$ 4,025	3,704
Variable Interest Entity, Primary Beneficiary [Member]
Variable Interest Entity [Line Items]
Carrying amount of assets, consolidated variable interest entity	501	423
Carrying amount of liabilities, consolidated variable interest entity	$ 91	68
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	$ 72,097	71,001	[1]
Carrying amount of liabilities, consolidated variable interest entity	41,057	41,773	[1]
FPL [Member] | Other variable interest entities [Member]
Variable Interest Entity [Line Items]
Investments in special purpose entities	$ 3,399	3,124
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	$ 184	188
Carrying amount of liabilities, consolidated variable interest entity	$ 24	22
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	33
Carrying amount of assets, consolidated variable interest entity	$ 16,200	16,200
Carrying amount of liabilities, consolidated variable interest entity	$ 1,400	1,700
Solar generating facility capability (in MW) | MW	778
Wind electric generating facility capability (in megawatts) | MW	10,513
NextEra Energy Resources [Member] | Variable Interest Entities Wind and Solar PV Facilities [Member[
Variable Interest Entity [Line Items]
Carrying amount of assets, consolidated variable interest entity	$ 1,600	1,600
Carrying amount of liabilities, consolidated variable interest entity	$ 100	400
Ownership percentage	10.00%
Solar generating facility capability (in MW) | MW	599
Wind electric generating facility capability (in megawatts) | MW	400
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	$ 756	751
Carrying amount of liabilities, consolidated variable interest entity	$ 573	607
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	$ 4,267	$ 3,932
Number of entities committed to invest in | entity	5

[1] Amounts have been retrospectively adjusted to reflect the merger of FPL and Gulf Power Company, see Note 5 - Merger of FPL and Gulf Power Company.