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Investments in Partnerships and Joint Ventures (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Equity method investment, financial statement, reported amounts [Abstract] |  |  |
Ownership interest in partnerships and joint ventures | $ 5,728 | $ 7,453 |
NextEra Energy Resources' ownership interest, low range (in hundredths) | 31.00% |  |
NextEra Energy Resources' ownership interest, high range (in hundredths) | 57.00% |  |
Equity method investment, summarized financial information [Abstract] |  |  |
Net Income (Loss) Attributable to Noncontrolling Interest | $ (550) | (381) | $ (862)
Total assets | 127,684 | 117,691 | 103,702
Total liabilities | 82,755 | 75,844 |
Investment in equity method investees | 5,728 | 7,453 | 6,748
Interest and Fee Income, Other Loans | 120 | 101 | $ 94
Due from Related Parties, Current | 68 | 53 |
Due from Related Parties, Noncurrent | 32 | 33 |
Guarantor Obligations, Current Carrying Value | 288 |  |
Equity Method Investment, Nonconsolidated Investee, Other |  |  |
Equity method investment, summarized financial information [Abstract] |  |  |
Net Income (Loss) Attributable to Noncontrolling Interest | 516 | 128 |
Total assets | 22,717 | 20,659 |
Total liabilities | 6,612 | 6,956 |
Partners'/members' equity(a) | 16,105 | 13,703 |
NEER [Member] |  |  |
Equity method investment, summarized financial information [Abstract] |  |  |
NEE's share of underlying equity in the principal entities | 3,927 | 3,723 |
Difference between investment carrying amount and underlying equity in net assets | 1,312 | 3,153 |
Investment in equity method investees | $ 5,239 | 6,876 |
Difference related to goodwill | 70.00% |  |
FPL[Member] |  |  |
Equity method investment, summarized financial information [Abstract] |  |  |
Total assets | $ 61,610 | 57,188 |
Total liabilities | $ 37,870 | $ 35,790 |
Electric Generating Assets To Gross Investment In Electric Utility Plant In Service | 47.00% | 46.00% |
General Facilities Assets To Gross Investment In Electric Utility Plant In Service | 6.00% | 7.00% |
Electric Distribution Assets To Gross Investment In Electric Utility Plant In Service | 35.00% | 35.00% |
NEP OpCo [Member] |  |  |
Equity method investment, summarized financial information [Abstract] |  |  |
Difference between investment carrying amount and underlying equity in net assets | $ 2,800 | $ 2,800 |
NEP [Member] |  |  |
Equity method investment, summarized financial information [Abstract] |  |  |
Due to Related Parties | 10 | 12 |
Guarantor Obligations, Current Carrying Value | 640 |  |
Guarantees, Fair Value Disclosure | 31 |  |
NEP [Member] |  |  |
Equity method investment, summarized financial information [Abstract] |  |  |
Investment in equity method investees |  | $ 4,400 |
Mountain Valley Pipeline [Member] |  |  |
Equity method investment, summarized financial information [Abstract] |  |  |
Equity Method Investment , Amortization Period Related To Goodwill | $ 1,500 |  |
Minimum [Member] | NEER [Member] |  |  |
Equity method investment, summarized financial information [Abstract] |  |  |
Amortization period | 20 years |  |
Maximum [Member] | NEER [Member] |  |  |
Equity method investment, summarized financial information [Abstract] |  |  |
Amortization period | 28 years |  |

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