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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, 2023 | Dec. 31, 2022 | Dec. 31, 2021
NEER Segment |  |  |
Long-term Purchase Commitment [Line Items] |  |  |
Capacity payments and/or minimum payments - 2024 | $ 4,825 |  |
Capacity payments and/or minimum payments - 2025 | 565 |  |
Capacity payments and/or minimum payments - 2026 | 255 |  |
Capacity payments and/or minimum payments - 2027 | 240 |  |
Capacity payments and/or minimum payments - 2028 | 115 |  |
Capacity payments and/or minimum payments - Thereafter | 1,970 |  |
Commitment to invest | 230 |  |
Joint Obligations First Year | 1,065 |  |
Joint Obligations Second Year | 40 |  |
Joint Obligations Third Year | $ 5 |  |
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 | 4,400 |  |
FPL [Member] |  |  |
Long-term Purchase Commitment [Line Items] |  |  |
Capacity payments and/or minimum payments - 2024 | 1,100 |  |
Capacity payments and/or minimum payments - 2025 | 1,110 |  |
Capacity payments and/or minimum payments - 2026 | 1,110 |  |
Capacity payments and/or minimum payments - 2027 | 1,005 |  |
Capacity payments and/or minimum payments - 2028 | 955 |  |
Capacity payments and/or minimum payments - Thereafter | 7,830 |  |
Related Party Transaction, Amounts of Transaction | 417 | $ 418 | $ 419
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 - 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 - 2028 | 400 |  |
Capacity payments and/or minimum payments - Thereafter | $ 5,160 |  |
Join Venture [Member] | NEER Segment |  |  |
Long-term Purchase Commitment [Line Items] |  |  |
Ownership interest | 32.80% |  |
Consolidation, Eliminations [Member] | FPL [Member] |  |  |
Long-term Purchase Commitment [Line Items] |  |  |
Related Party Transaction, Amounts of Transaction | $ 99 | $ 102 | $ 105

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