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Condensed Consolidated Statements of Operations and Comprehensive Income - Duke Energy Ohio - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Regulated electric $ 7,064 $ 6,732
Regulated natural gas 1,105 866
Total operating revenues 8,249 7,671
Operating Expenses    
Operation, maintenance and other 1,499 1,380
Depreciation and amortization 1,512 1,387
Property and other taxes 428 386
Total operating expenses 5,912 5,720
Operating Income 2,343 1,963
Other Income and Expenses, net 143 186
Interest Expense 889 817
Income From Continuing Operations Before Income Taxes 1,597 1,332
Income Tax Expense From Continuing Operations 193 178
Net Income Attributable to Duke Energy Corporation 1,379 1,138
Fuel used in electric generation and purchased power    
Operating Expenses    
Cost of sales 2,099 2,335
Cost of natural gas    
Operating Expenses    
Cost of sales 374 232
Duke Energy Ohio    
Regulated electric 487 458
Regulated natural gas 279 220
Total operating revenues 766 678
Operating Expenses    
Operation, maintenance and other 124 126
Depreciation and amortization 112 99
Property and other taxes 116 102
Total operating expenses 602 526
Operating Income 164 152
Other Income and Expenses, net 5 6
Interest Expense 47 45
Income From Continuing Operations Before Income Taxes 122 113
Income Tax Expense From Continuing Operations 22 19
Net Income Attributable to Duke Energy Corporation 100 94
Duke Energy Ohio | Fuel used in electric generation and purchased power    
Operating Expenses    
Cost of sales 149 138
Duke Energy Ohio | Cost of natural gas    
Operating Expenses    
Cost of sales $ 101 $ 61