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Consolidated Statements of Operations - USD ($) shares in Millions, $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Operating Revenues |  |  |  |
Regulated electric |  | $ 22,615 | $ 22,097 | $ 21,177
Regulated natural gas |  | 1,759 | 1,773 | 1,734
Nonregulated electric and other |  | 705 | 651 | 654
Total operating revenues |  | 25,079 | 24,521 | 23,565
Operating Expenses |  |  |  |
Fuel used in electric generation and purchased power/Cost of natural gas |  | 6,826 | 6,831 | 6,350
Operation, maintenance and other |  | 6,066 | 6,463 | 5,944
Depreciation and amortization |  | 4,548 | 4,074 | 3,527
Property and other taxes |  | 1,307 | 1,280 | 1,233
Impairment charges |  | (8) | 402 | 282
Total operating expenses |  | 19,366 | 19,747 | 17,968
(Losses) Gains on Sales of Other Assets and Other, net |  | (4) | (89) | 28
Operating Income |  | 5,709 | 4,685 | 5,625
Other Income and Expenses |  |  |  |
Equity in earnings of unconsolidated affiliates |  | 162 | 83 | 119
Other income and expenses, net |  | 430 | 399 | 508
Total other income and expenses |  | 592 | 482 | 627
Interest Expense |  | 2,204 | 2,094 | 1,986
Income (Loss) from Continuing Operations before Income Taxes |  | 4,097 | 3,073 | 4,266
Income Tax Expense From Continuing Operations |  | 519 | 448 | 1,196
Income From Continuing Operations |  | 3,578 | 2,625 | 3,070
(Loss) Income From Discontinued Operations, net of tax |  | (7) | 19 | (6)
Net Income |  | 3,571 | 2,644 | 3,064
Less: Net (Loss) Income Attributable to Noncontrolling Interests |  | (177) | (22) | 5
Net Income Attributable to Parent |  | 3,748 | 2,666 | 3,059
Less: Preferred Dividends |  | 41 |  |
Net Income Available to Common Stockholders |  | 3,707 | 2,666 | 3,059
Other Comprehensive (Loss) Income, net of tax(a) |  |  |  |
Pension and OPEB adjustments | [1] | 9 | (6) | 3
Net unrealized (losses) gains on cash flow hedges | [1] | (47) | (10) |
Net unrealized gain on cash flow hedges | [1] |  |  | 2
Reclassification into earnings from cash flow hedges | [1] | 6 | 6 |
Reclassification into earnings from cash flow hedges | [1] |  |  | 8
Unrealized gains on available for sale securities | [1] | 8 | (3) | 13
Other Comprehensive (Loss) Income, net of tax | [1] | (24) | (13) | 26
Comprehensive Income |  | 3,547 | 2,631 | 3,090
Less: Comprehensive (Loss) Income Attributable to Noncontrolling Interests |  | (177) | (22) | 5
Comprehensive (Loss) Income Attributable to Parent |  | $ 3,683 | $ 2,653 | $ 3,085
Income from continuing operations available to Duke Energy Corporation common stockholders |  |  |  |
Basic and diluted (in usd per share) |  | $ 5.07 | $ 3.73 | $ 4.37
(Loss) Income from discontinued operations attributable to Duke Energy Corporation common stockholders |  |  |  |
Basic and diluted (in usd per share) |  | (0.01) | 0.03 | (0.01)
Net income available to Duke Energy Corporation common stockholders |  |  |  |
Basic and diluted (in usd per share) |  | $ 5.06 | $ 3.76 | $ 4.36
Weighted average shares outstanding |  |  |  |
Weighted average common shares outstanding – basic and diluted |  | 729 | 708 | 700
Cost of natural gas |  |  |  |
Operating Expenses |  |  |  |
Fuel used in electric generation and purchased power/Cost of natural gas |  | $ 627 | $ 697 | $ 632
Duke Energy Carolinas |  |  |  |
Operating Revenues |  |  |  |
Total operating revenues |  | 7,395 | 7,300 | 7,302
Operating Expenses |  |  |  |
Fuel used in electric generation and purchased power/Cost of natural gas |  | 1,804 | 1,821 | 1,822
Operation, maintenance and other |  | 1,868 | 2,130 | 2,021
Depreciation and amortization |  | 1,388 | 1,201 | 1,090
Property and other taxes |  | 292 | 295 | 281
Impairment charges |  | 17 | 192 | 0
Total operating expenses |  | 5,369 | 5,639 | 5,214
(Losses) Gains on Sales of Other Assets and Other, net |  |  | (1) | 1
Operating Income |  | 2,026 | 1,660 | 2,089
Other Income and Expenses |  |  |  |
Other income and expenses, net |  | 151 | 153 | 199
Total other income and expenses |  | 151 | 153 | 199
Interest Expense |  | 463 | 439 | 422
Income (Loss) from Continuing Operations before Income Taxes |  | 1,714 | 1,374 | 1,866
Income Tax Expense From Continuing Operations |  | 311 | 303 | 652
Net Income Attributable to Parent |  | 1,403 | 1,071 | 1,214
Other Comprehensive (Loss) Income, net of tax(a) |  |  |  |
Reclassification into earnings from cash flow hedges |  |  | 1 |
Reclassification into earnings from cash flow hedges |  |  |  | 2
Other Comprehensive (Loss) Income, net of tax |  |  | 1 | 2
Comprehensive (Loss) Income Attributable to Parent |  | 1,403 | 1,072 | 1,216
Progress Energy |  |  |  |
Operating Revenues |  |  |  |
Total operating revenues |  | 11,202 | 10,728 | 9,783
Operating Expenses |  |  |  |
Fuel used in electric generation and purchased power/Cost of natural gas |  | 4,024 | 3,976 | 3,417
Operation, maintenance and other |  | 2,495 | 2,613 | 2,301
Depreciation and amortization |  | 1,845 | 1,619 | 1,285
Property and other taxes |  | 561 | 529 | 503
Impairment charges |  | (24) | 87 | 156
Total operating expenses |  | 8,901 | 8,824 | 7,662
(Losses) Gains on Sales of Other Assets and Other, net |  |  | 24 | 26
Operating Income |  | 2,301 | 1,928 | 2,147
Other Income and Expenses |  |  |  |
Other income and expenses, net |  | 141 | 165 | 209
Total other income and expenses |  | 141 | 165 | 209
Interest Expense |  | 862 | 842 | 824
Income From Continuing Operations Before Income Taxes |  | 1,580 | 1,251 | 1,532
Income Tax Expense From Continuing Operations |  | 253 | 218 | 264
Net Income |  | 1,327 | 1,033 | 1,268
Less: Net (Loss) Income Attributable to Noncontrolling Interests |  |  | 6 | 10
Net Income Attributable to Parent |  | 1,327 | 1,027 | 1,258
Other Comprehensive (Loss) Income, net of tax(a) |  |  |  |
Pension and OPEB adjustments |  | 2 | 5 | 4
Net unrealized (losses) gains on cash flow hedges |  | 5 | 6 |
Net unrealized gain on cash flow hedges |  |  |  | 5
Unrealized gains on available for sale securities |  | 1 | (1) | 4
Other Comprehensive (Loss) Income, net of tax |  | 8 | 10 | 13
Comprehensive Income |  | 1,335 | 1,043 | 1,281
Less: Comprehensive (Loss) Income Attributable to Noncontrolling Interests |  |  | 6 | 10
Comprehensive (Loss) Income Attributable to Parent |  | 1,335 | 1,037 | 1,271
Duke Energy Progress |  |  |  |
Operating Revenues |  |  |  |
Total operating revenues |  | 5,957 | 5,699 | 5,129
Operating Expenses |  |  |  |
Fuel used in electric generation and purchased power/Cost of natural gas |  | 2,012 | 1,892 | 1,609
Operation, maintenance and other |  | 1,446 | 1,578 | 1,439
Depreciation and amortization |  | 1,143 | 991 | 725
Property and other taxes |  | 176 | 155 | 156
Impairment charges |  | 12 | 33 | 19
Total operating expenses |  | 4,789 | 4,649 | 3,948
(Losses) Gains on Sales of Other Assets and Other, net |  |  | 9 | 4
Operating Income |  | 1,168 | 1,059 | 1,185
Other Income and Expenses |  |  |  |
Other income and expenses, net |  | 100 | 87 | 115
Total other income and expenses |  | 100 | 87 | 115
Interest Expense |  | 306 | 319 | 293
Income (Loss) from Continuing Operations before Income Taxes |  | 962 | 827 | 1,007
Income Tax Expense From Continuing Operations |  | 157 | 160 | 292
Net Income Attributable to Parent |  | 805 | 667 | 715
Other Comprehensive (Loss) Income, net of tax(a) |  |  |  |
Comprehensive (Loss) Income Attributable to Parent |  | 805 | 667 | 715
Duke Energy Florida |  |  |  |
Operating Revenues |  |  |  |
Total operating revenues |  | 5,231 | 5,021 | 4,646
Operating Expenses |  |  |  |
Fuel used in electric generation and purchased power/Cost of natural gas |  | 2,012 | 2,085 | 1,808
Operation, maintenance and other |  | 1,034 | 1,025 | 853
Depreciation and amortization |  | 702 | 628 | 560
Property and other taxes |  | 392 | 374 | 347
Impairment charges |  | (36) | 54 | 138
Total operating expenses |  | 4,104 | 4,166 | 3,706
(Losses) Gains on Sales of Other Assets and Other, net |  |  | 1 | 1
Operating Income |  | 1,127 | 856 | 941
Other Income and Expenses |  |  |  |
Other income and expenses, net |  | 48 | 86 | 96
Total other income and expenses |  | 48 | 86 | 96
Interest Expense |  | 328 | 287 | 279
Income (Loss) from Continuing Operations before Income Taxes |  | 847 | 655 | 758
Income Tax Expense From Continuing Operations |  | 155 | 101 | 46
Net Income Attributable to Parent |  | 692 | 554 | 712
Other Comprehensive (Loss) Income, net of tax(a) |  |  |  |
Unrealized gains on available for sale securities |  | 1 | (1) | 3
Other Comprehensive (Loss) Income, net of tax |  | 1 | (1) | 3
Comprehensive (Loss) Income Attributable to Parent |  | 693 | 553 | 715
Duke Energy Ohio |  |  |  |
Operating Revenues |  |  |  |
Regulated electric |  | 1,456 | 1,450 | 1,373
Regulated natural gas |  | 484 | 506 | 508
Nonregulated electric and other |  |  | 1 | 42
Total operating revenues |  | 1,940 | 1,957 | 1,923
Operating Expenses |  |  |  |
Operation, maintenance and other |  | 520 | 480 | 530
Depreciation and amortization |  | 265 | 268 | 261
Property and other taxes |  | 308 | 290 | 278
Impairment charges |  |  |  | 1
Total operating expenses |  | 1,576 | 1,563 | 1,604
(Losses) Gains on Sales of Other Assets and Other, net |  |  | (106) | 1
Operating Income |  | 364 | 288 | 320
Other Income and Expenses |  |  |  |
Other income and expenses, net |  | 24 | 23 | 23
Total other income and expenses |  | 24 | 23 | 23
Interest Expense |  | 109 | 92 | 91
Income (Loss) from Continuing Operations before Income Taxes |  | 279 | 219 | 252
Income Tax Expense From Continuing Operations |  | 40 | 43 | 59
Income From Continuing Operations |  | 239 | 176 | 193
(Loss) Income From Discontinued Operations, net of tax |  | (1) |  | (1)
Net Income Attributable to Parent |  | 238 | 176 | 192
Other Comprehensive (Loss) Income, net of tax(a) |  |  |  |
Comprehensive (Loss) Income Attributable to Parent |  | 238 | 176 | 192
Duke Energy Ohio | Cost of natural gas |  |  |  |
Operating Expenses |  |  |  |
Fuel used in electric generation and purchased power/Cost of natural gas |  | 95 | 113 | 107
Duke Energy Ohio | Electric Utilities and Infrastructure |  |  |  |
Operating Expenses |  |  |  |
Fuel used in electric generation and purchased power/Cost of natural gas |  | 388 | 412 | 369
Duke Energy Ohio | Electricity, Nonregulated |  |  |  |
Operating Expenses |  |  |  |
Fuel used in electric generation and purchased power/Cost of natural gas |  |  |  | 58
Duke Energy Indiana |  |  |  |
Operating Revenues |  |  |  |
Total operating revenues |  | 3,004 | 3,059 | 3,047
Operating Expenses |  |  |  |
Fuel used in electric generation and purchased power/Cost of natural gas |  | 935 | 1,000 | 966
Operation, maintenance and other |  | 790 | 788 | 743
Depreciation and amortization |  | 525 | 520 | 458
Property and other taxes |  | 69 | 78 | 76
Impairment charges |  |  | 30 | 18
Total operating expenses |  | 2,319 | 2,416 | 2,261
Operating Income |  | 685 | 643 | 786
Other Income and Expenses |  |  |  |
Other income and expenses, net |  | 41 | 45 | 47
Total other income and expenses |  | 41 | 45 | 47
Interest Expense |  | 156 | 167 | 178
Income (Loss) from Continuing Operations before Income Taxes |  | 570 | 521 | 655
Income Tax Expense From Continuing Operations |  | 134 | 128 | 301
Net Income Attributable to Parent |  | 436 | 393 | 354
Piedmont |  |  |  |
Operating Revenues |  |  |  |
Regulated natural gas |  | 1,369 | 1,365 | 1,319
Nonregulated electric and other |  | 12 | 10 | 9
Total operating revenues |  | 1,381 | 1,375 | 1,328
Operating Expenses |  |  |  |
Fuel used in electric generation and purchased power/Cost of natural gas |  | 532 | 584 | 524
Operation, maintenance and other |  | 328 | 357 | 304
Depreciation and amortization |  | 172 | 159 | 148
Property and other taxes |  | 45 | 49 | 48
Impairment charges |  |  |  | 7
Total operating expenses |  | 1,077 | 1,149 | 1,031
Operating Income |  | 304 | 226 | 297
Other Income and Expenses |  |  |  |
Equity in earnings of unconsolidated affiliates |  | 8 | 7 | (6)
Other income and expenses, net |  | 20 | 14 | (11)
Total other income and expenses |  | 28 | 21 | (17)
Interest Expense |  | 87 | 81 | 79
Income (Loss) from Continuing Operations before Income Taxes |  | 245 | 166 | 201
Income Tax Expense From Continuing Operations |  | 43 | 37 | 62
Net Income Attributable to Parent |  | 202 | 129 | 139
Other Comprehensive (Loss) Income, net of tax(a) |  |  |  |
Comprehensive (Loss) Income Attributable to Parent |  | $ 202 | $ 129 | $ 139
[1] | Tax impacts are insignificant for all periods presented.

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