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Commitments and Contingencies (Required Capacity and/or Minimum Payments Under Contracts) (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
NEER Segment |  |  |
Long-term Purchase Commitment [Line Items] |  |  |
Capacity payments and/or minimum payments - 2023 | $ 2,995 |  |
Capacity payments and/or minimum payments - 2024 | 1,145 |  |
Capacity payments and/or minimum payments - 2025 | 135 |  |
Capacity payments and/or minimum payments - 2026 | 90 |  |
Capacity payments and/or minimum payments - 2027 | 80 |  |
Capacity payments and/or minimum payments - Thereafter | 510 |  |
Commitment to invest | 260 |  |
Joint Obligations First Year | 205 |  |
Joint Obligations Second Year | 865 |  |
Joint Obligations Third Year | 5 |  |
Joint Obligations Fourth Year | 5 |  |
Joint Obligations Fifth Year | 0 |  |
Joint ObligationsThereafter | $ 0 |  |
Mountain Valley Pipeline [Member] | NEER Segment |  |  |
Long-term Purchase Commitment [Line Items] |  |  |
Natural gas transportation agreement, term | 20 years |  |
Amounts Excluded from Required Capacity and or Minimum Payments, Annual Commitment | $ 70 |  |
Contract Group 1 [Member] | NEER Segment |  |  |
Long-term Purchase Commitment [Line Items] |  |  |
Commitment amount included in capital expenditures | 3,700 |  |
FPL [Member] |  |  |
Long-term Purchase Commitment [Line Items] |  |  |
Capacity payments and/or minimum payments - 2023 | 1,040 |  |
Capacity payments and/or minimum payments - 2024 | 970 |  |
Capacity payments and/or minimum payments - 2025 | 940 |  |
Capacity payments and/or minimum payments - 2026 | 930 |  |
Capacity payments and/or minimum payments - 2027 | 850 |  |
Capacity payments and/or minimum payments - Thereafter | 8,075 |  |
Related Party Transaction, Amounts of Transaction | 418 | $ 419 | $ 386
FPL [Member] | Natural Gas Including Transportation and Storage Contract Minimum Payments [Member] | Sabal Trail and Florida Southeast Connection [Member] |  |  |
Long-term Purchase Commitment [Line Items] |  |  |
Capacity payments and/or minimum payments - 2023 | 410 |  |
Capacity payments and/or minimum payments - 2024 | 410 |  |
Capacity payments and/or minimum payments - 2025 | 405 |  |
Capacity payments and/or minimum payments - 2026 | 400 |  |
Capacity payments and/or minimum payments - 2027 | 400 |  |
Capacity payments and/or minimum payments - Thereafter | $ 5,560 |  |
Join Venture [Member] | NEER Segment |  |  |
Long-term Purchase Commitment [Line Items] |  |  |
Ownership interest | 32.20% |  |
Consolidation, Eliminations [Member] | FPL [Member] |  |  |
Long-term Purchase Commitment [Line Items] |  |  |
Related Party Transaction, Amounts of Transaction | $ 102 | $ 105 | $ 108

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