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Commitments and Contingencies (Long-term Purchase Commitment) (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018
FPL [Member] |  |  |  |
Required capacity and/or minimum payments [Abstract] |  |  |  |
Remainder of 2019 | $ 250 |  | $ 250 |
2020 | 1,005 |  | 1,005 |
2021 | 1,000 |  | 1,000 |
2022 | 980 |  | 980 |
2023 | 975 |  | 975 |
Thereafter | 11,525 |  | 11,525 |
Related Party Transaction, Amounts of Transaction | 80 | $ 76 | 236 | $ 224
FPL [Member] | Sabal Trail and Florida Southeast Connection [Member] | Natural Gas, Including Transportation And Storage, Contract Minimum Payments [Member] |  |  |  |
Required capacity and/or minimum payments [Abstract] |  |  |  |
Remainder of 2019 | 80 |  | 80 |
2020 | 385 |  | 385 |
2021 | 415 |  | 415 |
2022 | 415 |  | 415 |
2023 | 410 |  | 410 |
Thereafter | 7,175 |  | 7,175 |
NextEra Energy Resources [Member] |  |  |  |
Required capacity and/or minimum payments [Abstract] |  |  |  |
Remainder of 2019 | 1,590 |  | 1,590 |
2020 | 2,505 |  | 2,505 |
2021 | 220 |  | 220 |
2022 | 195 |  | 195 |
2023 | 120 |  | 120 |
Thereafter | 1,480 |  | 1,480 |
Commitment to invest | 120 |  | 120 |
NextEra Energy Resources [Member] | Contract Group 1 [Member] |  |  |  |
Long-term Purchase Commitment [Line Items] |  |  |  |
Commitment amount included in capital expenditures | 4,300 |  | 4,300 |
NextEra Energy Resources [Member] | Mountain Valley Pipeline [Member] |  |  |  |
Required capacity and/or minimum payments [Abstract] |  |  |  |
2021 | 70 |  | 70 |
2022 | 70 |  | 70 |
2023 | 70 |  | 70 |
Thereafter | $ 1,180 |  | $ 1,180 |
Equity method investment, ownership percentage | 31.00% |  | 31.00% |
Corporate and Other [Member] |  |  |  |
Required capacity and/or minimum payments [Abstract] |  |  |  |
Remainder of 2019 | $ 110 |  | $ 110 |
2020 | 90 |  | 90 |
2021 | 75 |  | 75 |
2022 | 5 |  | 5 |
2023 | 5 |  | 5 |
Thereafter | 50 |  | 50 |
Joint Obligations Remainder Current Year | 320 |  | 320 |
Joint Obligations Second Year | 305 |  | 305 |
Joint Obligations Third Year | 30 |  | 30 |
Joint Obligations Fourth Year | 25 |  | 25 |
Joint Obligations Fifth Year | 15 |  | 15 |
Joint Obligations After Fifth Year | 10 |  | 10 |
Consolidation, Eliminations [Member] | FPL [Member] |  |  |  |
Required capacity and/or minimum payments [Abstract] |  |  |  |
Related Party Transaction, Amounts of Transaction | $ 28 | $ 24 | $ 81 | $ 69

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- Definition Commitment to invest in clean power and technology businesses. + References No definition available. + Details
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