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Commitments and Contingencies (Long-term Purchase Commitment) (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2022 | Jun. 30, 2021 | Jun. 30, 2022 | Jun. 30, 2021
NEER Segment |  |  |  |
Required capacity and/or minimum payments [Abstract] |  |  |  |
Remainder of 2022 | $ 3,460 |  | $ 3,460 |
2023 | 890 |  | 890 |
2024 | 210 |  | 210 |
2025 | 105 |  | 105 |
2026 | 65 |  | 65 |
Thereafter | 535 |  | 535 |
Commitment to invest | 240 |  | 240 |
Joint Obligations Remainder Current Year | 875 |  | 875 |
Joint Obligations Second Year | 335 |  | 335 |
Joint Obligations Third Year | 5 |  | 5 |
Joint Obligations Fourth Year | 5 |  | 5 |
Joint Obligations Fifth Year | 0 |  | 0 |
Joint Obligations After Fifth Year | 5 |  | 5 |
Contract Group 1 [Member] | NEER Segment |  |  |  |
Long-term Purchase Commitment [Line Items] |  |  |  |
Commitment amount included in capital expenditures | 4,100 |  | 4,100 |
Mountain Valley Pipeline | NEER Segment |  |  |  |
Required capacity and/or minimum payments [Abstract] |  |  |  |
Amounts Excluded from Required Capacity And/Or Minimum Payments, Annual Commitment | $ 70 |  | $ 70 |
Equity method investment, ownership percentage | 31.90% |  | 31.90% |
Florida Power & Light Company |  |  |  |
Required capacity and/or minimum payments [Abstract] |  |  |  |
Remainder of 2022 | $ 510 |  | $ 510 |
2023 | 1,010 |  | 1,010 |
2024 | 985 |  | 985 |
2025 | 915 |  | 915 |
2026 | 840 |  | 840 |
Thereafter | 8,625 |  | 8,625 |
Related Party Transaction, Amounts of Transaction | 107 | $ 105 | 209 | $ 209
Florida Power & Light Company | 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 2022 | 205 |  | 205 |
2023 | 410 |  | 410 |
2024 | 410 |  | 410 |
2025 | 405 |  | 405 |
2026 | 400 |  | 400 |
Thereafter | 5,960 |  | 5,960 |
Florida Power & Light Company | Consolidation, Eliminations [Member] |  |  |  |
Required capacity and/or minimum payments [Abstract] |  |  |  |
Related Party Transaction, Amounts of Transaction | $ 26 | $ 26 | $ 51 | $ 53

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