v3.26.3
Summary of Significant Accounting and Reporting Policies - Additional Information (Details)
 1 Months Ended 3 Months Ended 9 Months Ended 48 Months Ended
Oct. 31, 2026
USD ($)
Sep. 30, 2026
USD ($)
Mar. 31, 2026
USD ($)
Sep. 30, 2025
USD ($)
Sep. 30, 2026
USD ($)
Sep. 30, 2025
USD ($)
Dec. 31, 2029
USD ($)
kWh
Dec. 31, 2025
USD ($)
Accounting Policies [Line Items]                
Restricted cash and cash equivalents, current   $ 283,000,000     $ 283,000,000     $ 194,000,000
Restricted cash related to margin cash collateral that is netted against derivative assets   (29,000,000)     (29,000,000)     (50,000,000)
restricted cash related to margin cash collateral that is netted against derivative liabilities   100,000,000     100,000,000     81,000,000
Supplier finance program, obligation   2,700,000,000     2,700,000,000     4,200,000,000
Tax credits sold         1,684,000,000 $ 766,000,000    
Noncontrolling interests   11,367,000,000     11,367,000,000     11,871,000,000
Proceeds from sale of project minority interests         1,559,000,000 0    
Redeemable Noncontrolling Interest   1,477,000,000     1,477,000,000     0
Operating lease income   113,000,000   $ 82,000,000 329,000,000 200,000,000    
Gain in connection with sale   44,000,000   143,000,000 294,000,000 197,000,000    
Interest expense   (1,929,000,000)   1,153,000,000 (155,000,000) 3,987,000,000    
Investment in equity method investees   6,087,000,000     6,087,000,000     5,528,000,000
Variable Interest Entity, Primary Beneficiary [Member]                
Accounting Policies [Line Items]                
Redeemable Noncontrolling Interest   1,414,000,000     1,414,000,000      
Florida Power & Light Company                
Accounting Policies [Line Items]                
Tax credits sold         169,000,000 0    
Florida Power & Light Company                
Accounting Policies [Line Items]                
Storm reserve, value   (119,000,000)     (119,000,000)      
Restricted cash and cash equivalents, current   40,000,000     40,000,000     46,000,000
Interest expense   348,000,000   320,000,000 1,035,000,000 964,000,000    
Florida Power & Light Company | Forecast                
Accounting Policies [Line Items]                
Time Period After Filing of a Cost Recovery Petition that Future Storm Restoration Costs Would Be Recoverable on an Interim Basis             60 days  
Maximum storm surcharge             $ 5  
Increment of usage in Kwh on which storm surcharge is based | kWh             1,000  
Cost of recovery, period             12 months  
Florida Power & Light Company | Maximum | Subsequent Event                
Accounting Policies [Line Items]                
Recoverable storm restoration costs $ 500,000,000              
Florida Power & Light Company | Minimum | Subsequent Event                
Accounting Policies [Line Items]                
Recoverable storm restoration costs $ 450,000,000              
Florida Power & Light Company | 2025 Rate Agreement                
Accounting Policies [Line Items]                
Increase (dcrease) in income taxes         (24,000,000)      
RSM Amortization   24,000,000     24,000,000      
Florida Power & Light Company | 2025 Rate Agreement | Maximum                
Accounting Policies [Line Items]                
RSM reserve, authorized amount   1,500,000,000     1,500,000,000      
Florida Power & Light Company | 2021 Rate Agreement                
Accounting Policies [Line Items]                
RSM reversal of amortization, net   (172,000,000)            
Increase (decrease) in depreciation and amortization   62,000,000   218,000,000   (423,000,000)    
Increase (decrease) In depreciation and amortization, net   46,000,000            
Increase (dcrease) in income taxes   126,000,000            
NextEra Energy Resources                
Accounting Policies [Line Items]                
income associated with differential membership interests   412,000,000   309,000,000 1,459,000,000 1,120,000,000    
Investment in equity method investees       $ 1,700,000,000   $ 1,700,000,000    
NextEra Energy Resources | Rate-Regulated Transmission [Member] | Disposed of by Sale [Member]                
Accounting Policies [Line Items]                
Net gain in connection with sale         133,000,000      
Gain (after tax) in connection with sale         107,000,000      
Gain in connection with sale         253,000,000      
Interest expense         120,000,000      
Plant, Property, and Equipment, Decrease from Deconsolidation     $ 831,000,000          
Long-term Debt, Decrease from Deconsolidation     512,000,000          
Investment in equity method investees     287,000,000          
NextEra Energy Resources | Rate-Regulated Transmission [Member] | Balance Sheet Location [Axis]: us-gaap:CashAndCashEquivalentsAtCarryingValue | Disposed of by Sale [Member]                
Accounting Policies [Line Items]                
Purchase price     $ 287,000,000          
NextEra Energy Resources | Differential Membership Interests                
Accounting Policies [Line Items]                
Noncontrolling interests   (9,685,000,000)     (9,685,000,000)     $ (10,654,000,000)
NextEra Energy Resources | Project Minority Interests                
Accounting Policies [Line Items]                
Noncontrolling interests   414,000,000     414,000,000      
Proceeds from sale of project minority interests         1,559,000,000      
Redeemable Noncontrolling Interest   $ 1,145,000,000     $ 1,145,000,000      
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%