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Income Taxes (Components of Income Tax Expense) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Current income taxes |  |  |
Federal | $ (281) | $ (299) | $ (647)
State | (9) | 10 | (11)
Foreign | 1 | 2 | 3
Total current income taxes | (289) | (287) | (655)
Deferred income taxes |  |  |
Federal | 155 | 855 | 1,064
State | (92) | (38) | 49
Total deferred income taxes | 63 | 817 | 1,113
ITC amortization | (10) | (11) | (10)
Income tax (benefit) expense from continuing operations | (236) | 519 | 448
Tax expense from discontinued operations | 2 | (2) | (26)
Total income tax (benefit) expense included in Consolidated Statements of Operations | (234) | 517 | 422
Net operating loss carry forward | 79 | 775 | (18)
Duke Energy Income from Continuing Operations Before Income Taxes [Abstract] |  |  |
Domestic | 826 | 4,053 | 3,018
Foreign | 13 | 44 | 55
Total income from continuing operations before income taxes | 839 | 4,097 | 3,073
Duke Energy Carolinas |  |  |
Current income taxes |  |  |
Federal | 314 | 164 | (8)
State | 35 | 13 | 6
Foreign |  | 0 | 0
Total current income taxes | 349 | 177 | (2)
Deferred income taxes |  |  |
Federal | (171) | 175 | 299
State | (86) | (37) | 11
Total deferred income taxes | (257) | 138 | 310
ITC amortization | (4) | (4) | (5)
Income tax (benefit) expense from continuing operations | 88 | 311 | 303
Total income tax (benefit) expense included in Consolidated Statements of Operations | 88 | 311 | 303
Net operating loss carry forward | 20 | 8 | (22)
Duke Energy Income from Continuing Operations Before Income Taxes [Abstract] |  |  |
Total income from continuing operations before income taxes | 1,044 | 1,714 | 1,374
Progress Energy |  |  |
Current income taxes |  |  |
Federal | 280 | (173) | (135)
State | 29 | (7) | (5)
Foreign |  | 0 | 0
Total current income taxes | 309 | (180) | (140)
Deferred income taxes |  |  |
Federal | (167) | 422 | 341
State | (24) | 17 | 20
Total deferred income taxes | (191) | 439 | 361
ITC amortization | (5) | (6) | (3)
Income tax (benefit) expense from continuing operations | 113 | 253 | 218
Total income tax (benefit) expense included in Consolidated Statements of Operations | 113 | 253 | 218
Net operating loss carry forward | 39 | 243 | (293)
Duke Energy Progress |  |  |
Current income taxes |  |  |
Federal | 181 | (36) | (71)
State | 17 | (3) | (5)
Foreign |  | 0 | 0
Total current income taxes | 198 | (39) | (76)
Deferred income taxes |  |  |
Federal | (180) | 220 | 256
State | (49) | (18) | (17)
Total deferred income taxes | (229) | 202 | 239
ITC amortization | (5) | (6) | (3)
Income tax (benefit) expense from continuing operations | (36) | 157 | 160
Total income tax (benefit) expense included in Consolidated Statements of Operations | (36) | 157 | 160
Net operating loss carry forward | 3 | 35 | (59)
Duke Energy Income from Continuing Operations Before Income Taxes [Abstract] |  |  |
Total income from continuing operations before income taxes | 379 | 962 | 827
Duke Energy Florida |  |  |
Current income taxes |  |  |
Federal | 148 | (43) | (49)
State | 24 | 18 | (10)
Foreign |  | 0 | 0
Total current income taxes | 172 | (25) | (59)
Deferred income taxes |  |  |
Federal | 1 | 153 | 115
State | 25 | 27 | 45
Total deferred income taxes | 26 | 180 | 160
ITC amortization |  | 0 | 0
Income tax (benefit) expense from continuing operations | 198 | 155 | 101
Total income tax (benefit) expense included in Consolidated Statements of Operations | 198 | 155 | 101
Net operating loss carry forward | 30 | 152 | (219)
Duke Energy Income from Continuing Operations Before Income Taxes [Abstract] |  |  |
Total income from continuing operations before income taxes | 969 | 847 | 655
Duke Energy Ohio |  |  |
Current income taxes |  |  |
Federal | 10 | (41) | 20
State | 1 | (1) | (1)
Foreign |  | 0 | 0
Total current income taxes | 11 | (42) | 19
Deferred income taxes |  |  |
Federal | 30 | 77 | 21
State | 2 | 5 | 3
Total deferred income taxes | 32 | 82 | 24
ITC amortization |  | 0 | 0
Income tax (benefit) expense from continuing operations | 43 | 40 | 43
Total income tax (benefit) expense included in Consolidated Statements of Operations | 43 | 40 | 43
Net operating loss carry forward |  | 25 | (17)
Duke Energy Income from Continuing Operations Before Income Taxes [Abstract] |  |  |
Total income from continuing operations before income taxes | 295 | 279 | 219
Duke Energy Indiana |  |  |
Current income taxes |  |  |
Federal | 48 | (23) | 29
State | 7 | 1 | 3
Foreign |  | 0 | 0
Total current income taxes | 55 | (22) | 32
Deferred income taxes |  |  |
Federal | 12 | 128 | 74
State | 17 | 28 | 22
Total deferred income taxes | 29 | 156 | 96
ITC amortization |  | 0 | 0
Income tax (benefit) expense from continuing operations | 84 | 134 | 128
Total income tax (benefit) expense included in Consolidated Statements of Operations | 84 | 134 | 128
Net operating loss carry forward | 8 | 60 | (21)
Duke Energy Income from Continuing Operations Before Income Taxes [Abstract] |  |  |
Total income from continuing operations before income taxes | 492 | 570 | 521
Piedmont |  |  |
Current income taxes |  |  |
Federal | (27) | (92) | 67
State | (8) | (1) | 1
Foreign |  | 0 | 0
Total current income taxes | (35) | (93) | 68
Deferred income taxes |  |  |
Federal | 60 | 133 | (36)
State | (7) | 3 | 5
Total deferred income taxes | 53 | 136 | (31)
ITC amortization |  | 0 | 0
Income tax (benefit) expense from continuing operations | 18 | 43 | 37
Total income tax (benefit) expense included in Consolidated Statements of Operations | 18 | 43 | 37
Net operating loss carry forward | 11 | 90 | (39)
Duke Energy Income from Continuing Operations Before Income Taxes [Abstract] |  |  |
Total income from continuing operations before income taxes | $ 291 | $ 245 | $ 166

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