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v3.21.1

Summary of Significant Accounting and Reporting Policies (Details) $ in Thousands, € in Millions |  |  | 1 Months Ended | 3 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Jan. 01, 2023 USD ($) | Feb. 11, 2020 solar_generation_facility MW | Jan. 31, 2022 USD ($) | Mar. 31, 2021 USD ($) | Mar. 31, 2026 USD ($) | Mar. 31, 2025 USD ($) | Mar. 31, 2021 USD ($) | Mar. 31, 2020 USD ($) | Dec. 31, 2026 MW | Dec. 31, 2025 MW | Dec. 31, 2020 USD ($) | Mar. 31, 2020 EUR (€)
Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Restricted Cash and Cash Equivalents |  |  |  | $ 703,000 |  |  | $ 703,000 |  |  |  | $ 441,000 |  |
Restricted cash related to margin cash collateral that is netted against derivative instruments |  |  |  | 60,000 |  |  | 60,000 |  |  |  | 183,000 |  |
restricted cash related to margin cash collateral that is netted against derivative liabilities |  |  |  | 45,000 |  |  | 45,000 |  |  |  | 136,000 |  |
Gain in connection with sale |  |  |  |  |  |  | (14,000) | $ (273,000) |  |  |  |  |
Retained earnings |  |  |  | 26,273,000 |  |  | 26,273,000 |  |  |  | 25,363,000 |  |
Bad Debt Expense |  |  |  |  |  |  | 152,000 | 11,000 |  |  |  |  |
Gulf Power Segment |  |  |  |  |  |  |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Regulatory Assets, Coal Generating Assets, Remaining Net Book Value |  |  |  | 462,000 |  |  | 462,000 |  |  |  |  |  |
Hurricane Sally | Gulf Power Segment |  |  |  |  |  |  |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Recoverable storm costs |  |  |  | 187,000 |  |  |  |  |  |  |  |  |
FPL [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Restricted Cash and Cash Equivalents |  |  |  | 94,000 |  |  | 94,000 |  |  |  | 135,000 |  |
Retained earnings |  |  |  | 10,396,000 |  |  | 10,396,000 |  |  |  | 9,619,000 | [1] |
FPL [Member] | Forecast [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Base Rate Plan Term |  |  | 4 years |  |  |  |  |  |  |  |  |  |
Increase In Base Rate Revenues | $ 607,000 |  | $ 1,108,000 |  |  |  |  |  |  |  |  |  |
Renewable Energy Assets, Power Generation Capacity | MW |  |  |  |  |  |  |  |  | 894 | 894 |  |  |
Base Rate Adjustments, Renewable Energy Assets |  |  |  |  | $ 140,000 | $ 140,000 |  |  |  |  |  |  |
Regulatory Return On Common Equity |  |  | 11.50% |  |  |  |  |  |  |  |  |  |
Basis Point Incentive |  |  | 0.50% |  |  |  |  |  |  |  |  |  |
Combined Utility Rate Plan Term |  |  | 2 years |  |  |  |  |  |  |  |  |  |
Separate Utility Rate Plan Term |  |  | 2 years |  |  |  |  |  |  |  |  |  |
Other Current Assets [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Restricted cash and cash equivalents, current |  |  |  | 669,000 |  |  | 669,000 |  |  |  | 374,000 |  |
Other Current Assets [Member] | FPL [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Restricted cash and cash equivalents, current |  |  |  | $ 84,000 |  |  | $ 84,000 |  |  |  | $ 93,000 |  |
Two solar generation facilities located in Spain [Member] | Disposed of by Sale [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Gain in connection with sale |  |  |  |  |  |  |  | 260,000 |  |  |  |  |
Gain (after tax) in connection with sale |  |  |  |  |  |  |  | 260,000 |  |  |  |  |
Two solar generation facilities located in Spain [Member] | Disposed of by Sale [Member] | NextEra Energy Resources [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Number of generation facilities sold | solar_generation_facility |  | 2 |  |  |  |  |  |  |  |  |  |  |
Generating capacity (MW) | MW |  | 99.8 |  |  |  |  |  |  |  |  |  |  |
Purchase price |  |  |  |  |  |  |  | $ 121,000 |  |  |  |  | € 111
[1] | Amounts have been retrospectively adjusted to reflect the merger of FPL and Gulf Power Company, see Note 5 - Merger of FPL and Gulf Power Company.

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