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Income Taxes (Effective Tax Rates) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Reconciliation of Income Tax Expense at the U.S. Federal Statutory Tax Rate to the Actual Tax Expense from Continuing Operations [Abstract] |  |  |
Income tax expense, computed at the statutory rate of 21% | $ 1,001 | $ 856 | $ 838
State income tax, net of federal income tax effect | 43 | (17) | 1
Amortization of EDIT | (388) | (481) | (438)
AFUDC equity income | (41) | (41) | (34)
AFUDC equity depreciation | 37 | 36 | 35
Tax credits(b) | (63) | (43) | (30)
Valuation allowance |  |  | (85)
Interest on company-owned life insurance | 114 |  |
Other items, net | (37) | (10) | (19)
Income tax expense from continuing operations | $ 438 | $ 300 | $ 268
Effective tax rate (as a percent) | 9.20% | 7.40% | 6.70%
Federal capital gain |  |  | $ 426
Domestic Tax Authority |  |  |
Reconciliation of Income Tax Expense at the U.S. Federal Statutory Tax Rate to the Actual Tax Expense from Continuing Operations [Abstract] |  |  |
Favorable adjustment amounts | $ 114 |  |
State |  |  |
Reconciliation of Income Tax Expense at the U.S. Federal Statutory Tax Rate to the Actual Tax Expense from Continuing Operations [Abstract] |  |  |
Favorable adjustment amounts | 6 |  |
Duke Energy Carolinas |  |  |
Reconciliation of Income Tax Expense at the U.S. Federal Statutory Tax Rate to the Actual Tax Expense from Continuing Operations [Abstract] |  |  |
Income tax expense, computed at the statutory rate of 21% | 338 | $ 362 | 291
State income tax, net of federal income tax effect | 12 | (23) | (44)
Amortization of EDIT | (197) | (195) | (184)
AFUDC equity income | (19) | (20) | (14)
AFUDC equity depreciation | 18 | 18 | 18
Tax credits(b) | (11) | (12) | (12)
Other items, net |  | (4) | (4)
Income tax expense from continuing operations | $ 141 | $ 126 | $ 51
Effective tax rate (as a percent) | 8.80% | 7.30% | 3.70%
Progress Energy |  |  |
Reconciliation of Income Tax Expense at the U.S. Federal Statutory Tax Rate to the Actual Tax Expense from Continuing Operations [Abstract] |  |  |
Income tax expense, computed at the statutory rate of 21% | $ 490 | $ 457 | $ 384
State income tax, net of federal income tax effect | 60 | 44 | 34
Amortization of EDIT | (114) | (133) | (174)
AFUDC equity income | (14) | (14) | (11)
AFUDC equity depreciation | 13 | 12 | 10
Tax credits(b) | (46) | (16) | (11)
Other items, net | (12) | (2) | (5)
Income tax expense from continuing operations | $ 377 | $ 348 | $ 227
Effective tax rate (as a percent) | 16.20% | 16.00% | 12.40%
Duke Energy Progress |  |  |
Reconciliation of Income Tax Expense at the U.S. Federal Statutory Tax Rate to the Actual Tax Expense from Continuing Operations [Abstract] |  |  |
Income tax expense, computed at the statutory rate of 21% | $ 241 | $ 245 | $ 224
State income tax, net of federal income tax effect | 18 | 6 | (14)
Amortization of EDIT | (91) | (74) | (120)
AFUDC equity income | (11) | (11) | (7)
AFUDC equity depreciation | 6 | 6 | 5
Tax credits(b) | (7) | (9) | (8)
Other items, net | (7) | (5) | (5)
Income tax expense from continuing operations | $ 149 | $ 158 | $ 75
Effective tax rate (as a percent) | 13.00% | 13.60% | 7.00%
Duke Energy Florida |  |  |
Reconciliation of Income Tax Expense at the U.S. Federal Statutory Tax Rate to the Actual Tax Expense from Continuing Operations [Abstract] |  |  |
Income tax expense, computed at the statutory rate of 21% | $ 268 | $ 238 | $ 194
State income tax, net of federal income tax effect | 56 | 48 | 47
Amortization of EDIT | (23) | (59) | (54)
AFUDC equity income | (3) | (3) | (3)
AFUDC equity depreciation | 7 | 6 | 5
Tax credits(b) | (39) | (7) | (3)
Other items, net | (5) | 2 | 1
Income tax expense from continuing operations | $ 261 | $ 225 | $ 187
Effective tax rate (as a percent) | 20.40% | 19.80% | 20.20%
Duke Energy Ohio |  |  |
Reconciliation of Income Tax Expense at the U.S. Federal Statutory Tax Rate to the Actual Tax Expense from Continuing Operations [Abstract] |  |  |
Income tax expense, computed at the statutory rate of 21% | $ 83 | $ 59 | $ 49
State income tax, net of federal income tax effect | (2) | 3 | 2
Amortization of EDIT | (22) | (79) | (22)
AFUDC equity income | (2) | (1) | (2)
AFUDC equity depreciation | 2 | 1 | 2
Tax credits(b) | (2) | (2) | (1)
Other items, net | 6 | (2) | 2
Income tax expense from continuing operations | $ 63 | $ (21) | $ 30
Effective tax rate (as a percent) | 15.90% | (7.50%) | 12.80%
Duke Energy Indiana |  |  |
Reconciliation of Income Tax Expense at the U.S. Federal Statutory Tax Rate to the Actual Tax Expense from Continuing Operations [Abstract] |  |  |
Income tax expense, computed at the statutory rate of 21% | $ 128 | $ 24 | $ 123
State income tax, net of federal income tax effect | 18 | 2 | 18
Amortization of EDIT | (33) | (48) | (34)
AFUDC equity income | (2) | (2) | (4)
AFUDC equity depreciation | 4 | 4 | 5
Tax credits(b) | (2) | (3) | (2)
Other items, net | (3) | (1) | 1
Income tax expense from continuing operations | $ 110 | $ (24) | $ 107
Effective tax rate (as a percent) | 18.10% | (21.20%) | 18.20%
Piedmont |  |  |
Reconciliation of Income Tax Expense at the U.S. Federal Statutory Tax Rate to the Actual Tax Expense from Continuing Operations [Abstract] |  |  |
Income tax expense, computed at the statutory rate of 21% | $ 97 | $ 76 | $ 71
State income tax, net of federal income tax effect | 12 | (4) | (8)
Amortization of EDIT | (20) | (23) | (25)
AFUDC equity income | (4) | (2) | (4)
Tax credits(b) | (1) | (8) | (4)
Income tax expense from continuing operations | $ 84 | $ 39 | $ 30
Effective tax rate (as a percent) | 18.10% | 10.80% | 8.80%

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