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Investments in Partnerships and Joint Ventures (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Equity method investment, financial statement, reported amounts [Abstract] |  |  |
Ownership interest in partnerships and joint ventures | $ 7,453 | $ 6,748 |
NextEra Energy Resources' ownership interest, low range (in hundredths) | 31.00% |  |
NextEra Energy Resources' ownership interest, high range (in hundredths) | 61.00% |  |
Equity method investment, summarized financial information [Abstract] |  |  |
Net income | $ 128 | 632 |
Total assets | 20,659 | 16,334 |
Total liabilities | 6,956 | 5,990 |
Partners'/members' equity(a) | 13,703 | 10,344 |
Investment in equity method investees | 7,453 | 6,748 | $ 2,321
Interest and Fee Income, Other Loans | 101 | 94 |
Due from Related Parties, Current | 53 | 45 |
Due from Related Parties, Noncurrent | 33 | 34 |
Guarantor Obligations, Current Carrying Value | 669 |  |
Guarantees, Fair Value Disclosure | 31 |  |
NEER [Member] |  |  |
Equity method investment, summarized financial information [Abstract] |  |  |
NEE's share of underlying equity in the principal entities | 3,723 | 2,958 |
Difference between investment carrying amount and underlying equity in net assets | 3,153 | 3,193 |
Investment in equity method investees | $ 6,876 | 6,151 |
Difference related to goodwill | 70.00% |  |
NEP [Member] |  |  |
Equity method investment, summarized financial information [Abstract] |  |  |
Due to Related Parties | $ 12 | 66 |
NEP [Member] |  |  |
Equity method investment, summarized financial information [Abstract] |  |  |
Investment in equity method investees |  | $ 4,400 |
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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