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Consolidated Statements of Operations - USD ($) shares in Millions, $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Operating Revenues |  |  |  |
Regulated electric |  | $ 21,461 | $ 22,615 | $ 22,097
Regulated natural gas |  | 1,642 | 1,759 | 1,773
Nonregulated electric and other |  | 765 | 705 | 651
Total operating revenues |  | 23,868 | 25,079 | 24,521
Operating Expenses |  |  |  |
Fuel used in electric generation and purchased power/Cost of natural gas |  | 6,051 | 6,826 | 6,831
Operation, maintenance and other |  | 5,788 | 6,066 | 6,463
Depreciation and amortization |  | 4,705 | 4,548 | 4,074
Property and other taxes |  | 1,337 | 1,307 | 1,280
Impairment charges |  | 984 | (8) | 402
Total operating expenses |  | 19,325 | 19,366 | 19,747
Gains (Losses) on Sales of Other Assets and Other, net |  | 10 | (4) | (89)
Operating Income |  | 4,553 | 5,709 | 4,685
Other Income and Expenses |  |  |  |
Equity in (losses) earnings of unconsolidated affiliates |  | (2,005) | 162 | 83
Other income and expenses, net |  | 453 | 430 | 399
Total other income and expenses |  | (1,552) | 592 | 482
Interest Expense |  | 2,162 | 2,204 | 2,094
Income From Continuing Operations Before Income Taxes |  | 839 | 4,097 | 3,073
Income Tax (Benefit) Expense From Continuing Operations |  | (236) | 519 | 448
Income From Continuing Operations |  | 1,075 | 3,578 | 2,625
Income (Loss) From Discontinued Operations, net of tax |  | 7 | (7) | 19
Net Income |  | 1,082 | 3,571 | 2,644
Add: Net Loss Attributable to Noncontrolling Interests |  | 295 | 177 | 22
Net Income Attributable to Parent |  | 1,377 | 3,748 | 2,666
Less: Preferred Dividends |  | 107 | 41 |
Net Income Available to Common Stockholders |  | 1,270 | 3,707 | 2,666
Other Comprehensive Income, net of tax |  |  |  |
Pension and OPEB adjustments | [1] | 6 | 9 | (6)
Net unrealized gain on cash flow hedges | [1] | (138) | (47) | (10)
Reclassification into earnings from cash flow hedges | [1] | 11 | 6 | 6
Unrealized (losses) gains on available-for-sale securities | [1] | 3 | 8 | (3)
Other Comprehensive Loss, net of tax | [1] | (118) | (24) | (13)
Comprehensive Income |  | 964 | 3,547 | 2,631
Add: Comprehensive Loss Attributable to Noncontrolling Interests |  | (306) | (177) | (22)
Comprehensive Income |  | $ 1,163 | $ 3,683 | $ 2,653
Income from continuing operations available to Duke Energy Corporation common stockholders |  |  |  |
Basic and diluted (usd per share) |  | $ 1.71 | $ 5.07 | $ 3.73
Income (Loss) from discontinued operations attributable to Duke Energy Corporation common stockholders |  |  |  |
Basic and diluted (usd per share) |  | 0.01 | (0.01) | 0.03
Net income available to Duke Energy Corporation common stockholders |  |  |  |
Basic and diluted (usd per share) |  | $ 1.72 | $ 5.06 | $ 3.76
Weighted average shares outstanding |  |  |  |
Basic (in shares) |  | 737 | 729 | 708
Diluted (in shares) |  | 738 | 729 | 708
Cost of natural gas |  |  |  |
Operating Expenses |  |  |  |
Fuel used in electric generation and purchased power/Cost of natural gas |  | $ 460 | $ 627 | $ 697
Duke Energy Carolinas |  |  |  |
Operating Revenues |  |  |  |
Total operating revenues |  | 7,015 | 7,395 | 7,300
Operating Expenses |  |  |  |
Fuel used in electric generation and purchased power/Cost of natural gas |  | 1,682 | 1,804 | 1,821
Operation, maintenance and other |  | 1,743 | 1,868 | 2,130
Depreciation and amortization |  | 1,462 | 1,388 | 1,201
Property and other taxes |  | 299 | 292 | 295
Impairment charges |  | 476 | 17 | 192
Total operating expenses |  | 5,662 | 5,369 | 5,639
Gains (Losses) on Sales of Other Assets and Other, net |  | 1 |  | (1)
Operating Income |  | 1,354 | 2,026 | 1,660
Other Income and Expenses |  |  |  |
Other income and expenses, net |  | 177 | 151 | 153
Total other income and expenses |  | 177 | 151 | 153
Interest Expense |  | 487 | 463 | 439
Income From Continuing Operations Before Income Taxes |  | 1,044 | 1,714 | 1,374
Income Tax (Benefit) Expense From Continuing Operations |  | 88 | 311 | 303
Net Income Attributable to Parent |  | 956 | 1,403 | 1,071
Other Comprehensive Income, net of tax |  |  |  |
Reclassification into earnings from cash flow hedges |  |  |  | 1
Other Comprehensive Loss, net of tax |  |  |  | 1
Comprehensive Income |  | 956 | 1,403 | 1,072
Progress Energy |  |  |  |
Operating Revenues |  |  |  |
Total operating revenues |  | 10,627 | 11,202 | 10,728
Operating Expenses |  |  |  |
Fuel used in electric generation and purchased power/Cost of natural gas |  | 3,479 | 4,024 | 3,976
Operation, maintenance and other |  | 2,479 | 2,495 | 2,613
Depreciation and amortization |  | 1,818 | 1,845 | 1,619
Property and other taxes |  | 545 | 561 | 529
Impairment charges |  | 495 | (24) | 87
Total operating expenses |  | 8,816 | 8,901 | 8,824
Gains (Losses) on Sales of Other Assets and Other, net |  | 9 |  | 24
Operating Income |  | 1,820 | 2,301 | 1,928
Other Income and Expenses |  |  |  |
Other income and expenses, net |  | 129 | 141 | 165
Total other income and expenses |  | 129 | 141 | 165
Interest Expense |  | 790 | 862 | 842
Income Before Income Taxes |  | 1,159 | 1,580 | 1,251
Income Tax (Benefit) Expense From Continuing Operations |  | 113 | 253 | 218
Net Income |  | 1,046 | 1,327 | 1,033
Add: Net Loss Attributable to Noncontrolling Interests |  | 1 |  | 6
Net Income Attributable to Parent |  | 1,045 | 1,327 | 1,027
Other Comprehensive Income, net of tax |  |  |  |
Pension and OPEB adjustments |  | (1) | 2 | 5
Net unrealized gain on cash flow hedges |  | 5 | 5 | 6
Unrealized (losses) gains on available-for-sale securities |  | (1) | 1 | (1)
Other Comprehensive Loss, net of tax |  | 3 | 8 | 10
Comprehensive Income |  | 1,049 | 1,335 | 1,043
Add: Comprehensive Loss Attributable to Noncontrolling Interests |  | 1 |  | 6
Comprehensive Income |  | 1,048 | 1,335 | 1,037
Duke Energy Progress |  |  |  |
Operating Revenues |  |  |  |
Total operating revenues |  | 5,422 | 5,957 | 5,699
Operating Expenses |  |  |  |
Fuel used in electric generation and purchased power/Cost of natural gas |  | 1,743 | 2,012 | 1,892
Operation, maintenance and other |  | 1,332 | 1,446 | 1,578
Depreciation and amortization |  | 1,116 | 1,143 | 991
Property and other taxes |  | 167 | 176 | 155
Impairment charges |  | 499 | 12 | 33
Total operating expenses |  | 4,857 | 4,789 | 4,649
Gains (Losses) on Sales of Other Assets and Other, net |  | 8 |  | 9
Operating Income |  | 573 | 1,168 | 1,059
Other Income and Expenses |  |  |  |
Other income and expenses, net |  | 75 | 100 | 87
Total other income and expenses |  | 75 | 100 | 87
Interest Expense |  | 269 | 306 | 319
Income From Continuing Operations Before Income Taxes |  | 379 | 962 | 827
Income Tax (Benefit) Expense From Continuing Operations |  | (36) | 157 | 160
Net Income Attributable to Parent |  | 415 | 805 | 667
Other Comprehensive Income, net of tax |  |  |  |
Comprehensive Income |  | 415 | 805 | 667
Duke Energy Florida |  |  |  |
Operating Revenues |  |  |  |
Total operating revenues |  | 5,188 | 5,231 | 5,021
Operating Expenses |  |  |  |
Fuel used in electric generation and purchased power/Cost of natural gas |  | 1,737 | 2,012 | 2,085
Operation, maintenance and other |  | 1,131 | 1,034 | 1,025
Depreciation and amortization |  | 702 | 702 | 628
Property and other taxes |  | 381 | 392 | 374
Impairment charges |  | (4) | (36) | 54
Total operating expenses |  | 3,947 | 4,104 | 4,166
Gains (Losses) on Sales of Other Assets and Other, net |  | 1 |  | 1
Operating Income |  | 1,242 | 1,127 | 856
Other Income and Expenses |  |  |  |
Other income and expenses, net |  | 53 | 48 | 86
Total other income and expenses |  | 53 | 48 | 86
Interest Expense |  | 326 | 328 | 287
Income From Continuing Operations Before Income Taxes |  | 969 | 847 | 655
Income Tax (Benefit) Expense From Continuing Operations |  | 198 | 155 | 101
Net Income Attributable to Parent |  | 771 | 692 | 554
Other Comprehensive Income, net of tax |  |  |  |
Unrealized (losses) gains on available-for-sale securities |  | (1) | 1 | (1)
Other Comprehensive Loss, net of tax |  | (1) | 1 | (1)
Comprehensive Income |  | 770 | 693 | 553
Duke Energy Ohio |  |  |  |
Operating Revenues |  |  |  |
Regulated electric |  | 1,405 | 1,456 | 1,450
Regulated natural gas |  | 453 | 484 | 506
Nonregulated electric and other |  |  |  | 1
Total operating revenues |  | 1,858 | 1,940 | 1,957
Operating Expenses |  |  |  |
Operation, maintenance and other |  | 463 | 520 | 480
Depreciation and amortization |  | 278 | 265 | 268
Property and other taxes |  | 324 | 308 | 290
Total operating expenses |  | 1,477 | 1,576 | 1,563
Gains (Losses) on Sales of Other Assets and Other, net |  |  |  | (106)
Operating Income |  | 381 | 364 | 288
Other Income and Expenses |  |  |  |
Other income and expenses, net |  | 16 | 24 | 23
Total other income and expenses |  | 16 | 24 | 23
Interest Expense |  | 102 | 109 | 92
Income From Continuing Operations Before Income Taxes |  | 295 | 279 | 219
Income Tax (Benefit) Expense From Continuing Operations |  | 43 | 40 | 43
Income From Continuing Operations |  | 252 | 239 | 176
Income (Loss) From Discontinued Operations, net of tax |  |  | (1) |
Net Income Attributable to Parent |  | 252 | 238 | 176
Other Comprehensive Income, net of tax |  |  |  |
Comprehensive Income |  | 252 | 238 | 176
Duke Energy Ohio | Cost of natural gas |  |  |  |
Operating Expenses |  |  |  |
Fuel used in electric generation and purchased power/Cost of natural gas |  | 73 | 95 | 113
Duke Energy Ohio | Electric Utilities and Infrastructure |  |  |  |
Operating Expenses |  |  |  |
Fuel used in electric generation and purchased power/Cost of natural gas |  | 339 | 388 | 412
Duke Energy Indiana |  |  |  |
Operating Revenues |  |  |  |
Total operating revenues |  | 2,795 | 3,004 | 3,059
Operating Expenses |  |  |  |
Fuel used in electric generation and purchased power/Cost of natural gas |  | 767 | 935 | 1,000
Operation, maintenance and other |  | 762 | 790 | 788
Depreciation and amortization |  | 569 | 525 | 520
Property and other taxes |  | 81 | 69 | 78
Impairment charges |  |  |  | 30
Total operating expenses |  | 2,179 | 2,319 | 2,416
Operating Income |  | 616 | 685 | 643
Other Income and Expenses |  |  |  |
Other income and expenses, net |  | 37 | 41 | 45
Total other income and expenses |  | 37 | 41 | 45
Interest Expense |  | 161 | 156 | 167
Income From Continuing Operations Before Income Taxes |  | 492 | 570 | 521
Income Tax (Benefit) Expense From Continuing Operations |  | 84 | 134 | 128
Net Income Attributable to Parent |  | 408 | 436 | 393
Piedmont |  |  |  |
Operating Revenues |  |  |  |
Regulated natural gas |  | 1,286 | 1,369 | 1,365
Nonregulated electric and other |  | 11 | 12 | 10
Total operating revenues |  | 1,297 | 1,381 | 1,375
Operating Expenses |  |  |  |
Fuel used in electric generation and purchased power/Cost of natural gas |  | 386 | 532 | 584
Operation, maintenance and other |  | 322 | 328 | 357
Depreciation and amortization |  | 180 | 172 | 159
Property and other taxes |  | 53 | 45 | 49
Impairment charges |  | 7 |  |
Total operating expenses |  | 948 | 1,077 | 1,149
Operating Income |  | 349 | 304 | 226
Other Income and Expenses |  |  |  |
Equity in (losses) earnings of unconsolidated affiliates |  | 9 | 8 | 7
Other income and expenses, net |  | 51 | 20 | 14
Total other income and expenses |  | 60 | 28 | 21
Interest Expense |  | 118 | 87 | 81
Income From Continuing Operations Before Income Taxes |  | 291 | 245 | 166
Income Tax (Benefit) Expense From Continuing Operations |  | 18 | 43 | 37
Net Income Attributable to Parent |  | 273 | 202 | 129
Other Comprehensive Income, net of tax |  |  |  |
Comprehensive Income |  | $ 273 | $ 202 | $ 129
[1] | Net of income tax impacts of approximately $35 million for the year ended December 31, 2020. Tax impacts are immaterial for other periods presented.

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