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Variable Interest Entities (VIEs) (Details) $ in Millions | 1 Months Ended | 9 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Sep. 30, 2019 USD ($) variable_interest_entity entity mi MW | Feb. 28, 2018 USD ($) | Sep. 30, 2019 USD ($) variable_interest_entity entity mi MW | Dec. 31, 2007 USD ($) | Dec. 31, 2018 USD ($) variable_interest_entity entity
Variable Interest Entity [Line Items] |  |  |  |  |
Total number of consolidated variable interest entities | variable_interest_entity | 30 |  | 30 |  |
Net cash proceeds |  | $ 71 |  |  |
Gain on sale |  | 50 |  |  |
Gain on sale, after tax |  | $ 37 |  |  |
Investment in equity method investees | $ 7,180 |  | $ 7,180 |  | $ 6,748
Variable Interest Entities Gas And Oil Primary Beneficiary 2 [Member] [Domain] |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |
Number of entities with ownership interest contributed | entity |  |  |  |  | 2
Other variable interest entities [Member] |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |
Investments in special purpose entities |  |  |  |  | $ 2,668
Variable Interest Entity, Primary Beneficiary [Member] |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |
Carrying amount of assets, consolidated variable interest entity | 149 |  | 149 |  |
Carrying amount of liabilities, consolidated variable interest entity | $ 27 |  | $ 27 |  |
Electricity transmission line (mi) | mi | 275 |  | 275 |  |
Percentage of profits and losses |  |  | 50.00% |  |
FPL [Member] | Bankruptcy remote special purpose subsidiary [Member] |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |
Senior Secured Debt Aggregate Principal Amount Issued |  |  |  | $ 652 |
Carrying amount of assets, consolidated variable interest entity |  |  |  |  | 77
Carrying amount of liabilities, consolidated variable interest entity |  |  |  |  | 76
FPL [Member] | Other variable interest entities [Member] |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |
Investments in special purpose entities | $ 2,476 |  | $ 2,476 |  | $ 2,203
NextEra Energy Resources [Member] |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |
Total number of consolidated variable interest entities | variable_interest_entity | 28 |  | 28 |  |
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 | 2 |  | 2 |  | 3
Carrying amount of assets, consolidated variable interest entity | $ 212 |  | $ 212 |  | $ 257
Carrying amount of liabilities, consolidated variable interest entity | $ 22 |  | $ 22 |  | $ 21
Natural gas and or oil electric generating facility capacity (in megawatts) | MW |  |  | 1,450 |  |
NextEra Energy Resources [Member] | Variable Interest Entities Gas And Oil Primary Beneficiary 2 [Member] [Domain] |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |
Number of entities with ownership interest contributed | entity | 2 |  | 2 |  | 2
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 | 23 |  | 23 |  | 25
Carrying amount of assets, consolidated variable interest entity | $ 9,400 |  | $ 9,400 |  | $ 10,200
Carrying amount of liabilities, consolidated variable interest entity | $ 800 |  | $ 800 |  | 1,400
Solar generating facility capability (in MW) | MW |  |  | 473 |  |
Wind electric generating facility capability (in megawatts) | MW |  |  | 6,452 |  |
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 |  | 3 |  |
Carrying amount of assets, consolidated variable interest entity | $ 793 |  | $ 793 |  | 529
Carrying amount of liabilities, consolidated variable interest entity | $ 616 |  | $ 616 |  | 557
Ownership percentage |  |  | 50.00% |  |
Number of entities with ownership interest contributed | variable_interest_entity | 5 |  | 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 | $ 4,194 |  | $ 4,194 |  | $ 4,680
Number of entities committed to invest in | entity | 4 |  | 4 |  |
Senior Secured Debt [Member] | FPL [Member] | Bankruptcy remote special purpose subsidiary [Member] |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |
Proceeds from issuance of storm-recovery bonds |  |  |  | $ 644 |

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