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Consolidated Statements of Operations - USD ($) shares in Millions, $ in Millions | 2 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2016 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | Oct. 31, 2016
Operating Revenues |  |  |  |  |  |
Regulated electric |  | $ 22,097 | $ 21,177 | $ 21,221 |  |
Regulated natural gas |  | 1,773 | 1,734 | 863 |  |
Nonregulated electric and other |  | 651 | 654 | 659 |  |
Total operating revenues |  | 24,521 | 23,565 | 22,743 |  |
Operating Expenses |  |  |  |  |  |
Fuel used in electric generation and purchased power/Cost of natural gas |  | 6,831 | 6,350 | 6,625 |  |
Cost of natural gas |  | 697 | 632 | 265 |  |
Operation, maintenance and other |  | 6,463 | 5,944 | 6,224 |  |
Depreciation and amortization |  | 4,074 | 3,527 | 3,294 |  |
Property and other taxes |  | 1,280 | 1,233 | 1,142 |  |
Impairment charges |  | 402 | 282 | 18 |  |
Total operating expenses |  | 19,747 | 17,968 | 17,568 |  |
(Losses) Gains on Sales of Other Assets and Other, net |  | (89) | 28 | 27 |  |
Operating Income |  | 4,685 | 5,625 | 5,202 |  |
Other Income and Expenses |  |  |  |  |  |
Equity in earnings (losses) of unconsolidated affiliates |  | 83 | 119 | (15) |  |
Other income and expenses, net |  | 399 | 508 | 463 |  |
Total other income and expenses |  | 482 | 627 | 448 |  |
Interest Expense |  | 2,094 | 1,986 | 1,916 |  |
Income From Continuing Operations Before Income Taxes |  | 3,073 | 4,266 | 3,734 |  |
Income Tax Expense From Continuing Operations |  | 448 | 1,196 | 1,156 |  |
Income From Continuing Operations |  | 2,625 | 3,070 | 2,578 |  |
Income (Loss) From Discontinued Operations, net of tax |  | 19 | (6) | (408) |  |
Net Income |  | 2,644 | 3,064 | 2,170 |  |
Less: Net (Loss) Income Attributable to Noncontrolling Interests |  | (22) | 5 | 18 |  |
Net Income Attributable to Parent |  | 2,666 | 3,059 | 2,152 |  |
Other Comprehensive (Loss) Income, net of tax |  |  |  |  |  |
Pension and OPEB adjustments |  | (6) | 3 | (11) |  |
Net unrealized (losses) gains on cash flow hedges |  | (10) | 2 | 17 |  |
Reclassification into earnings from cash flow hedges |  | 6 | 8 | 13 |  |
Unrealized gains on available for sale securities |  | (3) | 13 | 2 |  |
Other Comprehensive (Loss) Income, net of tax |  | (13) | 26 | 715 | [1] |
Comprehensive Income |  | 2,631 | 3,090 | 2,885 |  |
Less: Comprehensive (Loss) Income Attributable to Noncontrolling Interests |  | (22) | 5 | 20 |  |
Comprehensive (Loss) Income Attributable to Parent |  | $ 2,653 | $ 3,085 | $ 2,865 |  |
Income from continuing operations attributable to Duke Energy Corporation common stockholders |  |  |  |  |  |
Basic (in usd per share) |  | $ 3.73 | $ 4.37 | $ 3.71 |  |
Diluted (in usd per share) |  | 3.73 | 4.37 | 3.71 |  |
Income (Loss) from discontinued operations attributable to Duke Energy Corporation common stockholders |  |  |  |  |  |
Basic (in usd per share) |  | 0.03 | (0.01) | (0.60) |  |
Diluted (in usd per share) |  | 0.03 | (0.01) | (0.60) |  |
Net income attributable to Duke Energy Corporation common stockholders |  |  |  |  |  |
Basic (in usd per share) |  | 3.76 | 4.36 | 3.11 |  |
Diluted (in usd per share) |  | $ 3.76 | $ 4.36 | $ 3.11 |  |
Weighted average shares outstanding |  |  |  |  |  |
Basic (in shares) |  | 708 | 700 | 691 |  |
Diluted (in shares) |  | 708 | 700 | 691 |  |
Duke Energy Carolinas [Member] |  |  |  |  |  |
Operating Revenues |  |  |  |  |  |
Total operating revenues |  | $ 7,300 | $ 7,302 | $ 7,322 |  |
Operating Expenses |  |  |  |  |  |
Fuel used in electric generation and purchased power/Cost of natural gas |  | 1,821 | 1,822 | 1,797 |  |
Operation, maintenance and other |  | 2,130 | 2,021 | 2,158 |  |
Depreciation and amortization |  | 1,201 | 1,090 | 1,075 |  |
Property and other taxes |  | 295 | 281 | 276 |  |
Impairment charges |  | 192 |  | 1 |  |
Total operating expenses |  | 5,639 | 5,214 | 5,307 |  |
(Losses) Gains on Sales of Other Assets and Other, net |  | (1) | 1 | (5) |  |
Operating Income |  | 1,660 | 2,089 | 2,010 |  |
Other Income and Expenses |  |  |  |  |  |
Other income and expenses, net |  | 153 | 199 | 214 |  |
Total other income and expenses |  | 153 | 199 | 214 |  |
Interest Expense |  | 439 | 422 | 424 |  |
Income From Continuing Operations Before Income Taxes |  | 1,374 | 1,866 | 1,800 |  |
Income Tax Expense From Continuing Operations |  | 303 | 652 | 634 |  |
Net Income Attributable to Parent |  | 1,071 | 1,214 | 1,166 |  |
Other Comprehensive (Loss) Income, net of tax |  |  |  |  |  |
Reclassification into earnings from cash flow hedges |  | 1 | 2 | 2 |  |
Other Comprehensive (Loss) Income, net of tax |  | 1 | 2 | 2 |  |
Comprehensive (Loss) Income Attributable to Parent |  | 1,072 | 1,216 | 1,168 |  |
Progress Energy [Member] |  |  |  |  |  |
Operating Revenues |  |  |  |  |  |
Total operating revenues |  | 10,728 | 9,783 | 9,853 |  |
Operating Expenses |  |  |  |  |  |
Fuel used in electric generation and purchased power/Cost of natural gas |  | 3,976 | 3,417 | 3,644 |  |
Operation, maintenance and other |  | 2,613 | 2,301 | 2,458 |  |
Depreciation and amortization |  | 1,619 | 1,285 | 1,213 |  |
Property and other taxes |  | 529 | 503 | 487 |  |
Impairment charges |  | 87 | 156 | 7 |  |
Total operating expenses |  | 8,824 | 7,662 | 7,809 |  |
(Losses) Gains on Sales of Other Assets and Other, net |  | 24 | 26 | 25 |  |
Operating Income |  | 1,928 | 2,147 | 2,069 |  |
Other Income and Expenses |  |  |  |  |  |
Other income and expenses, net |  | 165 | 209 | 186 |  |
Total other income and expenses |  | 165 | 209 | 186 |  |
Interest Expense |  | 842 | 824 | 689 |  |
Income From Continuing Operations Before Income Taxes |  | 1,251 | 1,532 | 1,566 |  |
Income Tax Expense From Continuing Operations |  | 218 | 264 | 527 |  |
Income From Continuing Operations |  | 1,033 | 1,268 | 1,039 |  |
Income (Loss) From Discontinued Operations, net of tax |  |  |  | 2 |  |
Net Income |  | 1,033 | 1,268 | 1,041 |  |
Less: Net (Loss) Income Attributable to Noncontrolling Interests |  | 6 | 10 | 10 |  |
Net Income Attributable to Parent |  | 1,027 | 1,258 | 1,031 |  |
Other Comprehensive (Loss) Income, net of tax |  |  |  |  |  |
Pension and OPEB adjustments |  | 5 | 4 | 1 |  |
Net unrealized (losses) gains on cash flow hedges |  | 6 | 5 |  |  |
Reclassification into earnings from cash flow hedges |  | 0 | 0 | 8 |  |
Unrealized gains on available for sale securities |  | (1) | 4 | 1 |  |
Other Comprehensive (Loss) Income, net of tax |  | 10 | 13 | 10 |  |
Comprehensive Income |  | 1,043 | 1,281 | 1,051 |  |
Less: Comprehensive (Loss) Income Attributable to Noncontrolling Interests |  | 6 | 10 | 10 |  |
Comprehensive (Loss) Income Attributable to Parent |  | 1,037 | 1,271 | 1,041 |  |
Duke Energy Progress [Member] |  |  |  |  |  |
Operating Revenues |  |  |  |  |  |
Total operating revenues |  | 5,699 | 5,129 | 5,277 |  |
Operating Expenses |  |  |  |  |  |
Fuel used in electric generation and purchased power/Cost of natural gas |  | 1,892 | 1,609 | 1,830 |  |
Operation, maintenance and other |  | 1,578 | 1,439 | 1,565 |  |
Depreciation and amortization |  | 991 | 725 | 703 |  |
Property and other taxes |  | 155 | 156 | 156 |  |
Impairment charges |  | 33 | 19 | 1 |  |
Total operating expenses |  | 4,649 | 3,948 | 4,255 |  |
(Losses) Gains on Sales of Other Assets and Other, net |  | 9 | 4 | 3 |  |
Operating Income |  | 1,059 | 1,185 | 1,025 |  |
Other Income and Expenses |  |  |  |  |  |
Other income and expenses, net |  | 87 | 115 | 132 |  |
Total other income and expenses |  | 87 | 115 | 132 |  |
Interest Expense |  | 319 | 293 | 257 |  |
Income From Continuing Operations Before Income Taxes |  | 827 | 1,007 | 900 |  |
Income Tax Expense From Continuing Operations |  | 160 | 292 | 301 |  |
Net Income Attributable to Parent |  | 667 | 715 | 599 |  |
Other Comprehensive (Loss) Income, net of tax |  |  |  |  |  |
Comprehensive (Loss) Income Attributable to Parent |  | 667 | 715 | 599 |  |
Duke Energy Florida [Member] |  |  |  |  |  |
Operating Revenues |  |  |  |  |  |
Total operating revenues |  | 5,021 | 4,646 | 4,568 |  |
Operating Expenses |  |  |  |  |  |
Fuel used in electric generation and purchased power/Cost of natural gas |  | 2,085 | 1,808 | 1,814 |  |
Operation, maintenance and other |  | 1,025 | 853 | 884 |  |
Depreciation and amortization |  | 628 | 560 | 509 |  |
Property and other taxes |  | 374 | 347 | 333 |  |
Impairment charges |  | 54 | 138 | 6 |  |
Total operating expenses |  | 4,166 | 3,706 | 3,546 |  |
(Losses) Gains on Sales of Other Assets and Other, net |  | 1 | 1 |  |  |
Operating Income |  | 856 | 941 | 1,022 |  |
Other Income and Expenses |  |  |  |  |  |
Other income and expenses, net |  | 86 | 96 | 63 |  |
Total other income and expenses |  | 86 | 96 | 63 |  |
Interest Expense |  | 287 | 279 | 212 |  |
Income From Continuing Operations Before Income Taxes |  | 655 | 758 | 873 |  |
Income Tax Expense From Continuing Operations |  | 101 | 46 | 322 |  |
Net Income Attributable to Parent |  | 554 | 712 | 551 |  |
Other Comprehensive (Loss) Income, net of tax |  |  |  |  |  |
Unrealized gains on available for sale securities |  | (1) | 3 | 1 |  |
Other Comprehensive (Loss) Income, net of tax |  | (1) | 3 | 1 |  |
Comprehensive (Loss) Income Attributable to Parent |  | 553 | 715 | 552 |  |
Duke Energy Ohio [Member] |  |  |  |  |  |
Operating Revenues |  |  |  |  |  |
Regulated electric |  | 1,450 | 1,373 | 1,410 |  |
Regulated natural gas |  | 506 | 508 | 503 |  |
Nonregulated electric and other |  | 1 | 42 | 31 |  |
Total operating revenues |  | 1,957 | 1,923 | 1,944 |  |
Operating Expenses |  |  |  |  |  |
Cost of natural gas |  | 113 | 107 | 103 |  |
Operation, maintenance and other |  | 480 | 530 | 514 |  |
Depreciation and amortization |  | 268 | 261 | 233 |  |
Property and other taxes |  | 290 | 278 | 258 |  |
Impairment charges |  |  | 1 |  |  |
Total operating expenses |  | 1,563 | 1,604 | 1,601 |  |
(Losses) Gains on Sales of Other Assets and Other, net |  | (106) | 1 | 2 |  |
Operating Income |  | 288 | 320 | 345 |  |
Other Income and Expenses |  |  |  |  |  |
Other income and expenses, net |  | 23 | 23 | 11 |  |
Total other income and expenses |  | 23 | 23 | 11 |  |
Interest Expense |  | 92 | 91 | 86 |  |
Income From Continuing Operations Before Income Taxes |  | 219 | 252 | 270 |  |
Income Tax Expense From Continuing Operations |  | 43 | 59 | 78 |  |
Income From Continuing Operations |  | 176 | 193 | 192 |  |
Income (Loss) From Discontinued Operations, net of tax |  |  | (1) | 36 |  |
Net Income Attributable to Parent |  | 176 | 192 | 228 |  |
Other Comprehensive (Loss) Income, net of tax |  |  |  |  |  |
Comprehensive (Loss) Income Attributable to Parent |  | 176 | 192 | 228 |  |
Duke Energy Indiana [Member] |  |  |  |  |  |
Operating Revenues |  |  |  |  |  |
Total operating revenues |  | 3,059 | 3,047 | 2,958 |  |
Operating Expenses |  |  |  |  |  |
Fuel used in electric generation and purchased power/Cost of natural gas |  | 1,000 | 966 | 909 |  |
Operation, maintenance and other |  | 788 | 743 | 727 |  |
Depreciation and amortization |  | 520 | 458 | 496 |  |
Property and other taxes |  | 78 | 76 | 58 |  |
Impairment charges |  | 30 | 18 | 8 |  |
Total operating expenses |  | 2,416 | 2,261 | 2,198 |  |
(Losses) Gains on Sales of Other Assets and Other, net |  |  |  | 1 |  |
Operating Income |  | 643 | 786 | 761 |  |
Other Income and Expenses |  |  |  |  |  |
Other income and expenses, net |  | 45 | 47 | 26 |  |
Total other income and expenses |  | 45 | 47 | 26 |  |
Interest Expense |  | 167 | 178 | 181 |  |
Income From Continuing Operations Before Income Taxes |  | 521 | 655 | 606 |  |
Income Tax Expense From Continuing Operations |  | 128 | 301 | 225 |  |
Net Income Attributable to Parent |  | 393 | 354 | 381 |  |
Other Comprehensive (Loss) Income, net of tax |  |  |  |  |  |
Reclassification into earnings from cash flow hedges |  |  |  | (1) |  |
Other Comprehensive (Loss) Income, net of tax |  |  |  | (1) |  |
Comprehensive (Loss) Income Attributable to Parent |  | 393 | 354 | 380 |  |
Piedmont Natural Gas [Member] |  |  |  |  |  |
Operating Revenues |  |  |  |  |  |
Regulated natural gas | $ 320 | 1,365 | 1,319 |  |  | $ 1,139
Nonregulated electric and other | 2 | 10 | 9 |  |  | 10
Total operating revenues | 322 | 1,375 | 1,328 |  |  | 1,149
Operating Expenses |  |  |  |  |  |
Cost of natural gas | 144 | 584 | 524 |  |  | 391
Operation, maintenance and other | 50 | 357 | 304 |  |  | 353
Depreciation and amortization | 23 | 159 | 148 |  |  | 137
Property and other taxes | 7 | 49 | 48 |  |  | 43
Impairment charges |  |  | 7 |  |  |
Total operating expenses | 224 | 1,149 | 1,031 |  |  | 924
Operating Income | 98 | 226 | 297 |  |  | 225
Other Income and Expenses |  |  |  |  |  |
Equity in earnings (losses) of unconsolidated affiliates | 2 | 7 | (6) |  |  | 29
Gain on sale of unconsolidated affiliates |  |  |  |  |  | 133
Other income and expenses, net | (2) | 14 | (11) |  |  | (1)
Total other income and expenses |  | 21 | (17) |  |  | 161
Interest Expense | 12 | 81 | 79 |  |  | 69
Income From Continuing Operations Before Income Taxes | 86 | 166 | 201 |  |  | 317
Income Tax Expense From Continuing Operations | 32 | 37 | 62 |  |  | 124
Net Income Attributable to Parent | 54 | 129 | 139 |  |  | 193
Other Comprehensive (Loss) Income, net of tax |  |  |  |  |  |
Net unrealized (losses) gains on cash flow hedges |  |  |  |  |  | (3)
Reclassification into earnings from cash flow hedges |  |  |  |  |  | 4
Other Comprehensive (Loss) Income, net of tax |  |  |  |  |  | 1
Comprehensive (Loss) Income Attributable to Parent | $ 54 | 129 | 139 |  |  | $ 194
Electricity, US Regulated [Member] | Duke Energy Ohio [Member] |  |  |  |  |  |
Operating Expenses |  |  |  |  |  |
Fuel used in electric generation and purchased power/Cost of natural gas |  | $ 412 | 369 | 442 |  |
Electricity, Nonregulated [Member] | Duke Energy Ohio [Member] |  |  |  |  |  |
Operating Expenses |  |  |  |  |  |
Fuel used in electric generation and purchased power/Cost of natural gas |  |  | $ 58 | $ 51 |  |
[1] | Foreign Currency Translation Adjustments amount includes $620 million of cumulative adjustment realized as a result of the sale of the Latin American generation business. See Note 2 to the Consolidated Financial Statements.

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