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Summary of Significant Accounting and Reporting Policies - Additional Information (Details) |  | 3 Months Ended | 9 Months Ended | 12 Months Ended | 36 Months Ended | 48 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Aug. 20, 2025 numberOfGroups | Sep. 30, 2025 USD ($) | Mar. 31, 2025 USD ($) | Sep. 30, 2024 USD ($) facility basisPoint | Sep. 30, 2025 USD ($) | Sep. 30, 2024 USD ($) facility basisPoint MW | Dec. 31, 2025 USD ($) | Dec. 31, 2029 USD ($) | Dec. 31, 2029 USD ($) kWh MW | Jul. 23, 2025 USD ($) | Dec. 31, 2024 USD ($)
Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |
Restricted cash and cash equivalents, current |  | $ 323,000,000 |  |  | $ 323,000,000 |  |  |  |  |  | $ 159,000,000
Cash Received, Derivative, Exchange Traded |  |  |  |  |  |  |  |  |  |  | (244,000,000)
Restricted Cash |  |  |  |  |  |  |  |  |  |  | (85,000,000)
Restricted cash related to margin cash collateral that is netted against derivative assets |  |  |  |  |  |  |  |  |  |  | (279,000,000)
restricted cash related to margin cash collateral that is netted against derivative liabilities |  | 128,000,000 |  |  | 128,000,000 |  |  |  |  |  |
Supplier finance program, obligation |  | 2,300,000,000 |  |  | 2,300,000,000 |  |  |  |  |  | 4,000,000,000.0
Gain in connection with sale |  | 143,000,000 |  | $ 231,000,000 | 197,000,000 | $ 318,000,000 |  |  |  |  |
Florida Power & Light Company |  |  |  |  |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |
Tax credits sold |  |  |  |  | 766,000,000 | 768,000,000 |  |  |  |  |
Florida Power & Light Company |  |  |  |  |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |
Number of intervenors who filed a joint motion to approve a stipulation and settlement agreement | numberOfGroups | 10 |  |  |  |  |  |  |  |  |  |
Number of Intervenor Groups | numberOfGroups | 13 |  |  |  |  |  |  |  |  |  |
Restricted cash and cash equivalents, current |  | 48,000,000 |  |  | 48,000,000 |  |  |  |  |  | 101,000,000
Unpaid Storm Restoration Costs |  | 55,000,000 | $ 557,000,000 |  |  |  |  |  |  |  |
Florida Power & Light Company | Forecast |  |  |  |  |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |
Earned regulatory ROE threshold below which retail base rate relief may be sought |  |  |  |  |  |  |  |  | 9.95% |  |
Public Utilities, Requested Equity Capital Structure, Percentage |  |  |  |  |  |  |  |  | 59.60% |  |
Maximum storm surcharge |  |  |  |  |  |  |  |  | $ 5 |  |
Time Period After Filing of a Cost Recovery Petition that Future Storm Restoration Costs Would Be Recoverable on an Interim Basis |  |  |  |  |  |  |  |  | 60 days |  |
Earned regulatory ROE threshold above which retail base rate reduction may be sought |  |  |  |  |  |  |  |  | 11.95% |  |
Increment of usage in Kwh on which storm surcharge is based | kWh |  |  |  |  |  |  |  |  | 1,000 |  |
Cost of recovery, period |  |  |  |  |  |  |  |  | 12 months |  |
Tariff eligible minimal MW threshold | MW |  |  |  |  |  |  |  |  | 50 |  |
Recoverable storm restoration costs |  |  |  |  |  |  | $ 1,200,000,000 |  |  |  |
Regulatory Asset, Amortization Period |  |  |  |  |  |  | 12 months |  |  |  |
Florida Power & Light Company | Forecast | 2026 Rate Agreement |  |  |  |  |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |
Base Rate Proceeding, Rate Plan, Duration |  |  |  |  |  |  |  |  | 4 years |  |
General Base Revenue Requirement Increase (Decrease) |  |  |  |  |  |  |  | $ 705,000,000 | $ 945,000,000 |  |
Regulatory Return On Common Equity, Midpoint |  |  |  |  |  |  |  |  | 0.1095 |  |
Florida Power & Light Company | Forecast | Maximum | 2025 Rate Agreement |  |  |  |  |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |
Deferred tax liabilities |  |  |  |  |  |  |  | $ 1,155,000,000 | $ 1,155,000,000 |  |
Florida Power & Light Company | Forecast | Minimum |  |  |  |  |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |
Load factor |  |  |  |  |  |  |  |  | 0.85 |  |
NextEra Energy Resources |  |  |  |  |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |
income associated with differential membership interests |  | 309,000,000 |  | 281,000,000 | 1,120,000,000 | 986,000,000 |  |  |  |  |
NextEra Energy Resources | Rate-Regulated Transmission [Member] | Cash and Cash Equivalents | Disposed of by Sale [Member] |  |  |  |  |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |
Purchase price |  |  |  |  |  |  |  |  |  | $ 270,000,000 |
NextEra Energy Resources | Three Natural Gas Pipelines and Certain Oil and Gas Shale Formations | Disposed of by Sale [Member] |  |  |  |  |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |
Purchase price |  |  |  | 101,000,000 |  | 101,000,000 |  |  |  |  |
Gain in connection with sale |  |  |  | 120,000,000 |  | 120,000,000 |  |  |  |  |
Gain (after tax) in connection with sale |  |  |  | 77,000,000 |  | 77,000,000 |  |  |  |  |
NextEra Energy Resources | Portfolio of Wind and Solar Generation Facilities | Disposed of by Sale [Member] | United States, Geographically Dispersed |  |  |  |  |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |
Purchase price |  |  |  | 900,000,000 |  | 900,000,000 |  |  |  |  |
Gain in connection with sale |  |  |  | 103,000,000 |  | 103,000,000 |  |  |  |  |
Gain (after tax) in connection with sale |  |  |  | $ 76,000,000 |  | $ 76,000,000 |  |  |  |  |
NextEra Energy Resources | Differential Membership Interests |  |  |  |  |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |
Noncontrolling Interests associated with Differential Membership Interests |  | $ (9,252,000,000) |  |  | $ (9,252,000,000) |  |  |  |  |  | $ (9,062,000,000)
Subsidiary of NEET | Rate-Regulated Transmission Asset Joint Venture | Rate-Regulated Transmission [Member] | Disposed of by Sale [Member] |  |  |  |  |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |
Equity method investment, percentage sold |  |  |  |  |  |  |  |  |  | 50.00% |
Subsidiary of NEET | Rate-Regulated Transmission Asset Joint Venture | Rate-Regulated Transmission [Member] | Disposed of by Sale [Member] | Rate-Regulated Transmission Asset Joint Venture |  |  |  |  |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |
Equity method investment, ownership percentage |  |  |  |  |  |  |  |  |  | 50.00% |
Subsidiaries of NextEra Energy Resources | Certain Oil and Gas Shale Formations | Disposed of by Sale [Member] |  |  |  |  |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |
Ownership percentage sold |  |  |  | 100.00% |  | 100.00% |  |  |  |  |
Subsidiaries of NextEra Energy Resources | Three Natural Gas Pipelines | Disposed of by Sale [Member] | Southern U.S. |  |  |  |  |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |
Number of Natural Gas Pipelines Facilities | basisPoint |  |  |  | 3 |  | 3 |  |  |  |  |
Number of Pipeline Facilities NEER Will Continue to Operate | basisPoint |  |  |  | 2 |  | 2 |  |  |  |  |
Subsidiaries of NextEra Energy Resources | Portfolio of Wind and Solar Generation Facilities | Disposed of by Sale [Member] | United States, Geographically Dispersed |  |  |  |  |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |
Number of wind generation facilities | facility |  |  |  | 5 |  | 5 |  |  |  |  |
Number of solar generation facilities | facility |  |  |  | 3 |  | 3 |  |  |  |  |
Generating capacity (MW) | MW |  |  |  |  |  | 1,634 |  |  |  |  |
Subsidiaries of NextEra Energy Resources | Pipeline Joint Venture | Three Natural Gas Pipelines | Disposed of by Sale [Member] |  |  |  |  |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |
Equity method investment, percentage sold |  |  |  | 15.00% |  | 15.00% |  |  |  |  |
Subsidiaries of NextEra Energy Resources | Pipeline Joint Venture | Three Natural Gas Pipelines and Certain Oil and Gas Shale Formations | Disposed of by Sale [Member] | Pipeline Joint Venture |  |  |  |  |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |
Equity method investment, ownership percentage |  |  |  | 85.00% |  | 85.00% |  |  |  |  |
Subsidiaries of NextEra Energy Resources | Nitro Joint Venture | Portfolio of Wind and Solar Generation Facilities | Disposed of by Sale [Member] |  |  |  |  |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |
Equity method investment, percentage sold |  |  |  | 65.00% |  | 65.00% |  |  |  |  |
Subsidiaries of NextEra Energy Resources | Nitro Joint Venture | Portfolio of Wind and Solar Generation Facilities | Disposed of by Sale [Member] | Renewable Assets Joint Venture |  |  |  |  |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |
Equity method investment, ownership percentage |  |  |  | 35.00% |  | 35.00% |  |  |  |  |

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- Definition Where offsetting positions exist, restricted cash related to margin cash collateral that is netted against derivative liabilities + References No definition available. + Details
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- Definition Time Period After Filing of a Cost Recovery Petition that Future Storm Restoration Costs Would Be Recoverable on an Interim Basis + References No definition available. + Details
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- Definition Unpaid Storm Restoration Costs + References No definition available. + Details
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