v2.4.0.8
Condensed Consolidated Statements of Operations and Comprehensive Income (USD $)
In Millions, except Per Share data, unless otherwise specified
 3 Months Ended 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Operating Revenues        
Regulated electric $ 5,861 $ 5,685 $ 16,549 $ 15,355
Nonregulated electric, natural gas and other 449 449 1,403 1,415
Regulated natural gas 85 83 414 362
Total operating revenues 6,395 6,217 18,366 17,132
Operating Expenses        
Fuel used in electric generation and purchased power - regulated 2,132 2,013 5,940 5,394
Fuel used in electric generation and purchased power - nonregulated 148 130 410 435
Cost of natural gas and other 27 18 181 132
Operation, maintenance and other 1,409 1,402 4,254 4,211
Depreciation and amortization 788 672 2,305 1,940
Property and other taxes 275 319 936 972
Impairment charges 1 2 81 388
Total operating expenses 4,780 4,556 14,107 13,472
Gains (Losses) on Sales of Other Assets and Other, net 4 (1) 11 3
Operating Income (Loss) 1,619 1,660 4,270 3,663
Other Income and Expenses        
Equity in earnings of unconsolidated affiliates 28 32 97 91
Other income and expenses, net 109 55 293 182
Total other income and expenses 137 87 390 273
Interest Expense 405 378 1,212 1,125
Income (Loss) From Continuing Operations Before Income Taxes 1,351 1,369 3,448 2,811
Income Tax Expense (Benefit) from Continuing Operations 460 423 1,081 909
Income (Loss) from Continuing Operations Attributable to Parent 888 942 2,356 1,890
Income (Loss) From Continuing Operations 891 946 2,367 1,902
Income (Loss) From Discontinued Operations, net of tax 378 62 (578) 82
Net income (loss) 1,269 1,008 1,789 1,984
Less: Net Income (Loss) Attributable to Noncontrolling Interests (5) 4 3 7
Net Income (Loss) Attributable to Parent 1,274 1,004 1,786 1,977
Other Comprehensive Loss, net of tax        
Pension and OPEB adjustments 1    1 5
Net unrealized gain (loss) on cash flow hedges 2 [1] 1 [1] (10) [1] 55 [1]
Reclassification into earnings from cash flow hedges 2 1 5 1
Unrealized gains (losses) on investments in available-for-sale securities    (1) 2 (5)
Other Comprehensive Loss, net of tax (97) (4) (52) (78)
Comprehensive Income (Loss) 1,172 1,004 1,737 1,906
Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest (1) 4 8 3
Comprehensive Income Attributable to Parent 1,173 1,000 1,729 1,903
Income from continuing operations attributable to Duke Energy Corporation common shareholders        
Basic (usd per share) $ 1.25 $ 1.33 $ 3.33 $ 2.67
Diluted (usd per share) $ 1.25 $ 1.33 $ 3.33 $ 2.67
Income (Loss) from discontinued operations attributable to Duke Energy Corporation common shareholders        
Basic (usd per share) $ 0.55 $ 0.09 $ (0.81) $ 0.12
Diluted (usd per share) $ 0.55 $ 0.09 $ (0.81) $ 0.12
Net Income attributable to Duke Energy Corporation common shareholders        
Basic (usd per share) $ 1.80 $ 1.42 $ 2.52 $ 2.79
Diluted (usd per share) $ 1.80 $ 1.42 $ 2.52 $ 2.79
Weighted-average shares outstanding        
Basic (shares) 707 706 707 706
Diluted (shares) 707 706 707 706
Duke Energy Carolinas [Member]
        
Operating Revenues        
Total operating revenues 1,938 1,919 5,693 5,239
Operating Expenses        
Fuel used in electric generation and purchased power - regulated 524 539 1,685 1,500
Operation, maintenance and other 465 456 1,415 1,392
Depreciation and amortization 260 228 750 676
Property and other taxes 59 90 263 282
Impairment charges      3  
Total operating expenses 1,308 1,313 4,116 3,850
Gains (Losses) on Sales of Other Assets and Other, net    (2)      
Operating Income (Loss) 630 604 1,577 1,389
Other Income and Expenses        
Other income and expenses, net 44 29 137 94
Interest Expense 104 82 307 255
Income (Loss) From Continuing Operations Before Income Taxes 570 551 1,407 1,228
Income Tax Expense (Benefit) from Continuing Operations 193 209 474 461
Net Income (Loss) Attributable to Parent 377 342 933 767
Other Comprehensive Loss, net of tax        
Reclassification into earnings from cash flow hedges    1 2 1
Other Comprehensive Loss, net of tax     2 1
Comprehensive Income Attributable to Parent 377 343 935 768
Progress Energy [Member]
        
Operating Revenues        
Total operating revenues 2,863 2,766 7,825 7,233
Operating Expenses        
Fuel used in electric generation and purchased power - regulated 1,214 1,154 3,234 2,932
Operation, maintenance and other 564 559 1,714 1,653
Depreciation and amortization 294 240 851 644
Property and other taxes 127 141 415 423
Impairment charges 1 2 (16) 368
Total operating expenses 2,200 2,096 6,198 6,020
Gains (Losses) on Sales of Other Assets and Other, net 2 1 3 2
Operating Income (Loss) 665 671 1,630 1,215
Other Income and Expenses        
Other income and expenses, net 26 26 54 63
Interest Expense 166 162 502 520
Income (Loss) From Continuing Operations Before Income Taxes 525 535 1,182 758
Income Tax Expense (Benefit) from Continuing Operations 195 207 441 289
Income (Loss) from Continuing Operations Attributable to Parent 329 327 739 467
Income (Loss) From Continuing Operations 330 328 741 469
Income (Loss) From Discontinued Operations, net of tax   14 (6) 10
Net income (loss) 330 342 735 479
Less: Net Income (Loss) Attributable to Noncontrolling Interests 1 1 2 2
Net Income (Loss) Attributable to Parent 329 341 733 477
Other Comprehensive Loss, net of tax        
Pension and OPEB adjustments 1 4 2 5
Net unrealized gain (loss) on cash flow hedges    (3)      
Reclassification into earnings from cash flow hedges 1 3 5 3
Unrealized gains (losses) on investments in available-for-sale securities 1    1   
Other Comprehensive Loss, net of tax 3 4 8 8
Comprehensive Income (Loss) 333 346 743 487
Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest 1 1 2 2
Comprehensive Income Attributable to Parent 332 345 741 485
Duke Energy Progress [Member]
        
Operating Revenues        
Total operating revenues 1,367 1,430 3,980 3,781
Operating Expenses        
Fuel used in electric generation and purchased power - regulated 552 574 1,579 1,470
Operation, maintenance and other 346 352 1,074 1,044
Depreciation and amortization 155 143 441 393
Property and other taxes 29 59 150 172
Impairment charges       (18) 22
Total operating expenses 1,082 1,128 3,226 3,101
Gains (Losses) on Sales of Other Assets and Other, net    1 1 1
Operating Income (Loss) 285 303 755 681
Other Income and Expenses        
Other income and expenses, net 18 21 34 43
Interest Expense 57 52 172 147
Income (Loss) From Continuing Operations Before Income Taxes 246 272 617 577
Income Tax Expense (Benefit) from Continuing Operations 89 97 226 215
Net Income (Loss) Attributable to Parent 157 175 391 362
Duke Energy Florida [Member]
        
Operating Revenues        
Total operating revenues 1,491 1,332 3,832 3,442
Operating Expenses        
Fuel used in electric generation and purchased power - regulated 662 579 1,655 1,462
Operation, maintenance and other 212 207 626 616
Depreciation and amortization 139 95 410 237
Property and other taxes 99 81 266 245
Impairment charges 1 1 2 346
Total operating expenses 1,113 963 2,959 2,906
Gains (Losses) on Sales of Other Assets and Other, net          1
Operating Income (Loss) 378 369 873 537
Other Income and Expenses        
Other income and expenses, net 6 6 17 19
Interest Expense 51 46 150 138
Income (Loss) From Continuing Operations Before Income Taxes 333 329 740 418
Income Tax Expense (Benefit) from Continuing Operations 128 132 285 168
Net Income (Loss) Attributable to Parent 205 197 455 250
Other Comprehensive Loss, net of tax        
Pension and OPEB adjustments    (1)    (1)
Reclassification into earnings from cash flow hedges       1   
Other Comprehensive Loss, net of tax 0 (1) 1 (1)
Comprehensive Income Attributable to Parent 205 196 456 249
Duke Energy Ohio [Member]
        
Operating Revenues        
Regulated electric 352 338 998 957
Nonregulated electric, natural gas and other 6 16 17 28
Regulated natural gas 88 84 418 364
Total operating revenues 446 438 1,433 1,349
Operating Expenses        
Fuel used in electric generation and purchased power - regulated 129 121 360 327
Fuel used in electric generation and purchased power - nonregulated 5 13 24 32
Cost of natural gas and other 8 9 129 102
Operation, maintenance and other 134 133 378 415
Depreciation and amortization 54 53 167 160
Property and other taxes 58 59 170 184
Impairment charges       94   
Total operating expenses 388 388 1,322 1,220
Gains (Losses) on Sales of Other Assets and Other, net          4
Operating Income (Loss) 58 50 111 133
Other Income and Expenses        
Other income and expenses, net 3 2 9 4
Interest Expense 20 14 60 47
Income (Loss) From Continuing Operations Before Income Taxes 41 38 60 90
Income Tax Expense (Benefit) from Continuing Operations 15 14 21 33
Income (Loss) from Continuing Operations Attributable to Parent 26 24 39 57
Income (Loss) From Discontinued Operations, net of tax 413 35 (597) 39
Net Income (Loss) Attributable to Parent 439 59 (558) 96
Other Comprehensive Loss, net of tax        
Pension and OPEB adjustments          1
Other Comprehensive Loss, net of tax       1
Comprehensive Income Attributable to Parent 439 59 (558) 97
Duke Energy Indiana [Member]
        
Operating Revenues        
Total operating revenues 790 755 2,383 2,179
Operating Expenses        
Fuel used in electric generation and purchased power - regulated 319 283 945 852
Operation, maintenance and other 160 176 485 489
Depreciation and amortization 104 72 309 227
Property and other taxes 25 21 69 59
Total operating expenses 608 552 1,808 1,627
Operating Income (Loss) 182 203 575 552
Other Income and Expenses        
Other income and expenses, net 5 4 16 14
Interest Expense 40 43 127 127
Income (Loss) From Continuing Operations Before Income Taxes 147 164 464 439
Income Tax Expense (Benefit) from Continuing Operations 46 60 163 163
Net Income (Loss) Attributable to Parent 101 104 301 276
Other Comprehensive Loss, net of tax        
Reclassification into earnings from cash flow hedges    (1)    (2)
Other Comprehensive Loss, net of tax       (2)
Comprehensive Income Attributable to Parent $ 101 $ 103 $ 301 $ 274
[1] Net of insignificant tax expense and $5 million tax benefit for the three and nine months ended September 30, 2014 and $1 million tax benefit and $17 million tax expense for the three and nine months ended September 30, 2013.