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Condensed Consolidated Statements of Operations and Comprehensive Income - Duke Energy Ohio - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Sep. 30, 2024
Sep. 30, 2023
Regulated electric $ 7,775 $ 7,640 $ 21,253 $ 20,140
Regulated natural gas 298 284 1,511 1,497
Total operating revenues 8,154 7,994 22,997 21,848
Operating Expenses        
Operation, maintenance and other 1,409 1,428 4,108 4,113
Depreciation and amortization 1,516 1,353 4,312 3,913
Property and other taxes 383 394 1,162 1,136
Total operating expenses 6,017 5,891 17,208 16,679
Operating Income 2,144 2,111 5,814 5,215
Other Income and Expenses, net 181 178 555 516
Interest Expense 872 774 2,513 2,221
Income From Continuing Operations Before Income Taxes 1,453 1,515 3,856 3,510
Income Tax Expense From Continuing Operations 163 42 481 316
Net Income Attributable to Duke Energy Corporation 1,281 1,252 3,319 1,836
Fuel used in electric generation and purchased power        
Operating Expenses        
Cost of sales 2,644 2,571 7,207 6,987
Cost of natural gas        
Operating Expenses        
Cost of sales 70 57 380 434
Duke Energy Ohio        
Regulated electric 497 472 1,431 1,411
Regulated natural gas 108 105 460 464
Total operating revenues 605 577 1,891 1,875
Operating Expenses        
Operation, maintenance and other 131 114 378 358
Depreciation and amortization 102 90 297 266
Property and other taxes 99 94 303 258
Total operating expenses 496 449 1,494 1,485
Operating Income 109 128 397 390
Other Income and Expenses, net 2 12 12 33
Interest Expense 52 46 144 125
Income From Continuing Operations Before Income Taxes 59 94 265 298
Income Tax Expense From Continuing Operations 7 14 42 47
Net Income Attributable to Duke Energy Corporation 52 80 223 251
Duke Energy Ohio | Fuel used in electric generation and purchased power        
Operating Expenses        
Cost of sales 146 145 416 485
Duke Energy Ohio | Cost of natural gas        
Operating Expenses        
Cost of sales $ 18 $ 6 $ 100 $ 118