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Employee Benefit Plans (Narrative) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Jan. 01, 2026
Defined Benefit Plan Disclosure [Line Items]        
Maximum years of participation (in years) 35 years      
Matching contribution (as a percent) 100.00%      
Eligible pay (as a percent) 6.00%      
Additional contribution for employees not participating in defined pension plans (as a percent) 4.00%      
Vesting period (in years) 3 years      
Minimum        
Defined Benefit Plan Disclosure [Line Items]        
Defined Benefit Plan, Average Earnings, Period 3 years      
Maximum        
Defined Benefit Plan Disclosure [Line Items]        
Defined Benefit Plan, Average Earnings, Period 5 years      
Master Trust        
Defined Benefit Plan Disclosure [Line Items]        
Target allocation (as a percent) 100.00%      
Pension Plan        
Defined Benefit Plan Disclosure [Line Items]        
Actual return on plan assets $ 847 $ 270    
Average remaining service period (in years) 11 years      
Accumulated Benefit Obligation at measurement date $ 5,839 5,948    
Projected benefit obligation 5,871 5,980 $ 6,299  
Benefits paid 624 645    
Employer contributions 100 $ 100 $ 100  
Pension Plan | Nonqualified Plan        
Defined Benefit Plan Disclosure [Line Items]        
Accumulated Benefit Obligation at measurement date 187      
Projected benefit obligation 187      
Benefits paid 29      
Employer contributions $ 29      
Pension Plan | Minimum        
Defined Benefit Plan Disclosure [Line Items]        
Expected long-term rate of return on plan assets (as a percent) 8.50% 8.50% 6.50%  
Pension Plan | Maximum        
Defined Benefit Plan Disclosure [Line Items]        
Expected long-term rate of return on plan assets (as a percent) 7.00% 7.00% 8.25%  
Pension Plan | Master Trust        
Defined Benefit Plan Disclosure [Line Items]        
Master trust allocation (as a percent) 98.00% 98.00%    
Expected long-term rate of return on plan assets (as a percent) 7.00%      
Other Post-Retirement Benefit Plans        
Defined Benefit Plan Disclosure [Line Items]        
Actual return on plan assets $ 18 $ 7    
Average remaining service period (in years) 7 years      
Projected benefit obligation $ 321 334 $ 347  
Benefits paid 35 $ 37    
Employer contributions $ 26      
Other Post-Retirement Benefit Plans | Minimum        
Defined Benefit Plan Disclosure [Line Items]        
Expected long-term rate of return on plan assets (as a percent) 2.50% 2.75% 4.00%  
Other Post-Retirement Benefit Plans | Maximum        
Defined Benefit Plan Disclosure [Line Items]        
Expected long-term rate of return on plan assets (as a percent) 8.50% 8.50% 8.25%  
Other Post-Retirement Benefit Plans | Master Trust        
Defined Benefit Plan Disclosure [Line Items]        
Master trust allocation (as a percent) 2.00% 2.00%    
Expected long-term rate of return on plan assets (as a percent) 8.50%      
Target allocation (as a percent) 100.00%      
Duke Energy Carolinas | Pension Plan        
Defined Benefit Plan Disclosure [Line Items]        
Actual return on plan assets $ 214 $ 73    
Average remaining service period (in years) 11 years      
Accumulated Benefit Obligation at measurement date $ 1,408 1,444    
Projected benefit obligation 1,408 1,444 $ 1,514  
Benefits paid 181 177    
Employer contributions 27 26 26  
Duke Energy Carolinas | Pension Plan | Nonqualified Plan        
Defined Benefit Plan Disclosure [Line Items]        
Accumulated Benefit Obligation at measurement date 7      
Projected benefit obligation 7      
Benefits paid 1      
Employer contributions 1      
Duke Energy Carolinas | Other Post-Retirement Benefit Plans        
Defined Benefit Plan Disclosure [Line Items]        
Actual return on plan assets $ 10 4    
Average remaining service period (in years) 7 years      
Projected benefit obligation $ 57 63 69  
Benefits paid 8 8    
Employer contributions 3      
Progress Energy | Pension Plan        
Defined Benefit Plan Disclosure [Line Items]        
Actual return on plan assets $ 323 98    
Average remaining service period (in years) 9 years      
Accumulated Benefit Obligation at measurement date $ 1,846 1,861    
Projected benefit obligation 1,859 1,875 1,990  
Benefits paid 186 198    
Employer contributions 23 23 22  
Progress Energy | Pension Plan | Nonqualified Plan        
Defined Benefit Plan Disclosure [Line Items]        
Accumulated Benefit Obligation at measurement date 69      
Projected benefit obligation 69      
Benefits paid 7      
Employer contributions $ 7      
Progress Energy | Other Post-Retirement Benefit Plans        
Defined Benefit Plan Disclosure [Line Items]        
Average remaining service period (in years) 6 years      
Projected benefit obligation $ 142 146 146  
Benefits paid 14 15    
Employer contributions 13      
Duke Energy Progress | Pension Plan        
Defined Benefit Plan Disclosure [Line Items]        
Actual return on plan assets $ 145 46    
Average remaining service period (in years) 9 years      
Accumulated Benefit Obligation at measurement date $ 813 838    
Projected benefit obligation 814 838 911  
Benefits paid 103 111    
Employer contributions 14 14 13  
Duke Energy Progress | Pension Plan | Nonqualified Plan        
Defined Benefit Plan Disclosure [Line Items]        
Accumulated Benefit Obligation at measurement date 22      
Projected benefit obligation 22      
Benefits paid 2      
Employer contributions $ 2      
Duke Energy Progress | Other Post-Retirement Benefit Plans        
Defined Benefit Plan Disclosure [Line Items]        
Average remaining service period (in years) 5 years      
Projected benefit obligation $ 86 87 84  
Benefits paid 8 6    
Employer contributions 8      
Duke Energy Florida | Pension Plan        
Defined Benefit Plan Disclosure [Line Items]        
Actual return on plan assets $ 176 53    
Average remaining service period (in years) 9 years      
Accumulated Benefit Obligation at measurement date $ 1,023 1,013    
Projected benefit obligation 1,037 1,027 1,069  
Benefits paid 81 88    
Employer contributions 10 9 9  
Duke Energy Florida | Pension Plan | Nonqualified Plan        
Defined Benefit Plan Disclosure [Line Items]        
Accumulated Benefit Obligation at measurement date 25      
Projected benefit obligation 25      
Benefits paid 3      
Employer contributions $ 3      
Duke Energy Florida | Other Post-Retirement Benefit Plans        
Defined Benefit Plan Disclosure [Line Items]        
Average remaining service period (in years) 7 years      
Projected benefit obligation $ 58 60 60  
Benefits paid 6 6    
Employer contributions 6      
Duke Energy Indiana | Pension Plan        
Defined Benefit Plan Disclosure [Line Items]        
Actual return on plan assets $ 52 17    
Average remaining service period (in years) 13 years      
Accumulated Benefit Obligation at measurement date $ 469 466    
Projected benefit obligation 474 471 496  
Benefits paid 50 41    
Employer contributions 8 8 8  
Duke Energy Indiana | Pension Plan | Nonqualified Plan        
Defined Benefit Plan Disclosure [Line Items]        
Accumulated Benefit Obligation at measurement date 1      
Projected benefit obligation $ 1      
Duke Energy Indiana | Other Post-Retirement Benefit Plans        
Defined Benefit Plan Disclosure [Line Items]        
Average remaining service period (in years) 6 years      
Projected benefit obligation $ 19 20 24  
Benefits paid 3 3    
Employer contributions 3      
Piedmont | Pension Plan        
Defined Benefit Plan Disclosure [Line Items]        
Actual return on plan assets $ 28 10    
Average remaining service period (in years) 9 years      
Accumulated Benefit Obligation at measurement date $ 176 181    
Projected benefit obligation 176 181 175  
Benefits paid 16 12    
Employer contributions 3 3 3  
Piedmont | Pension Plan | Nonqualified Plan        
Defined Benefit Plan Disclosure [Line Items]        
Accumulated Benefit Obligation at measurement date 2      
Projected benefit obligation 2      
Piedmont | Other Post-Retirement Benefit Plans        
Defined Benefit Plan Disclosure [Line Items]        
Actual return on plan assets $ 4 3    
Average remaining service period (in years) 6 years      
Projected benefit obligation $ 15 15 15  
Benefits paid 2 1    
Employer contributions 1      
Duke Energy Ohio | Pension Plan        
Defined Benefit Plan Disclosure [Line Items]        
Actual return on plan assets $ 31 11    
Average remaining service period (in years) 14 years      
Accumulated Benefit Obligation at measurement date $ 300 304    
Projected benefit obligation 305 309 325  
Benefits paid 26 33    
Employer contributions 6 5 5  
Duke Energy Ohio | Pension Plan | Nonqualified Plan        
Defined Benefit Plan Disclosure [Line Items]        
Accumulated Benefit Obligation at measurement date 2      
Projected benefit obligation 2      
Duke Energy Ohio | Other Post-Retirement Benefit Plans        
Defined Benefit Plan Disclosure [Line Items]        
Actual return on plan assets $ 1      
Average remaining service period (in years) 6 years      
Projected benefit obligation $ 17 18 $ 19  
Benefits paid 2 2    
Employer contributions $ 2      
RCBP | Pension Plan        
Defined Benefit Plan Disclosure [Line Items]        
Average remaining service period (in years) 9 years      
DELPP | Pension Plan        
Defined Benefit Plan Disclosure [Line Items]        
Average remaining service period (in years) 15 years      
Duke Energy Retirement Cash Balance Plan        
Defined Benefit Plan Disclosure [Line Items]        
Settlement charge   72    
Duke Energy Retirement Cash Balance Plan | Other Nonoperating Income (Expense)        
Defined Benefit Plan Disclosure [Line Items]        
Settlement charge   12    
Duke Energy Retirement Cash Balance Plan | Other Nonoperating Income (Expense) | Duke Energy Carolinas        
Defined Benefit Plan Disclosure [Line Items]        
Settlement charge   3    
Duke Energy Retirement Cash Balance Plan | Other Nonoperating Income (Expense) | Progress Energy        
Defined Benefit Plan Disclosure [Line Items]        
Settlement charge   5    
Duke Energy Retirement Cash Balance Plan | Other Nonoperating Income (Expense) | Duke Energy Progress        
Defined Benefit Plan Disclosure [Line Items]        
Settlement charge   5    
Duke Energy Retirement Cash Balance Plan | Other Nonoperating Income (Expense) | Piedmont        
Defined Benefit Plan Disclosure [Line Items]        
Settlement charge   1    
Duke Energy Retirement Cash Balance Plan | Other Nonoperating Income (Expense) | Duke Energy Ohio        
Defined Benefit Plan Disclosure [Line Items]        
Settlement charge   2    
Regulatory Assets, Noncurrent | Noncurrent assets        
Defined Benefit Plan Disclosure [Line Items]        
Settlement charge   60    
Regulatory Assets, Noncurrent | Noncurrent assets | Duke Energy Carolinas        
Defined Benefit Plan Disclosure [Line Items]        
Settlement charge   31    
Regulatory Assets, Noncurrent | Noncurrent assets | Progress Energy        
Defined Benefit Plan Disclosure [Line Items]        
Settlement charge   23    
Regulatory Assets, Noncurrent | Noncurrent assets | Duke Energy Progress        
Defined Benefit Plan Disclosure [Line Items]        
Settlement charge   16    
Regulatory Assets, Noncurrent | Noncurrent assets | Duke Energy Florida        
Defined Benefit Plan Disclosure [Line Items]        
Settlement charge   7    
Regulatory Assets, Noncurrent | Noncurrent assets | Duke Energy Indiana        
Defined Benefit Plan Disclosure [Line Items]        
Settlement charge   3    
Regulatory Assets, Noncurrent | Noncurrent assets | Piedmont        
Defined Benefit Plan Disclosure [Line Items]        
Settlement charge   $ 4    
Subsequent Event | Pension Plan | Master Trust | Liability Hedging Assets        
Defined Benefit Plan Disclosure [Line Items]        
Target allocation (as a percent)       45.00%
Subsequent Event | Pension Plan | Master Trust | Return Seeking Assets        
Defined Benefit Plan Disclosure [Line Items]        
Target allocation (as a percent)       55.00%
Subsequent Event | Other Post-Retirement Benefit Plans | Master Trust | Liability Hedging Assets        
Defined Benefit Plan Disclosure [Line Items]        
Target allocation (as a percent)       65.00%
Subsequent Event | Other Post-Retirement Benefit Plans | Master Trust | Return Seeking Assets        
Defined Benefit Plan Disclosure [Line Items]        
Target allocation (as a percent)       35.00%