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Income Taxes (Tables)
 12 Months Ended
Dec. 31, 2022
Income Tax Disclosure [Abstract]  
Schedule of Components of Income Tax Expense (Benefit)
Components of Income Tax Expense
Tax benefit from discontinued operations, in the following tables, includes income tax benefits related to the Commercial Renewables Disposal Groups. See Note 2 for further details.
 Year Ended December 31, 2022
DukeDukeDukeDukeDuke
DukeEnergyProgressEnergyEnergyEnergyEnergy
(in millions)EnergyCarolinasEnergyProgressFloridaOhioIndianaPiedmont
Current income taxes
Federal $1 $(71)$(13)$37 $(37)$(2)$38 $32 
State (8)(13)(3)— (23)1 2 2 
Foreign 4 — — — — — — — 
Total current income taxes (3)(84)(16)37 (60)(1)40 34 
Deferred income taxes       
Federal 328 230 310 118 201 (22)(63)12 
State (14)(16)59 7 84 3 — (7)
Total deferred income taxes(a)
314 214 369 125 285 (19)(63)5 
ITC amortization (11)(4)(5)(4)— (1)(1)— 
Income tax expense from continuing operations 300 126 348 158 225 (21)(24)39 
Tax benefit from discontinued operations (503)— — — — — — — 
Total income tax (benefit) expense included in Consolidated Statements of Operations $(203)$126 $348 $158 $225 $(21)$(24)$39 
(a)     Total deferred income taxes includes the generation of NOL carryforwards and tax credit carryforwards of $550 million at Duke Energy, $97 million at Duke Energy Carolinas, $128 million at Progress Energy, $9 million at Duke Energy Progress, $111 million at Duke Energy Florida, $7 million at Duke Energy Ohio, $13 million at Duke Energy Indiana, and $12 million at Piedmont.
 Year Ended December 31, 2021
DukeDukeDukeDukeDuke
DukeEnergyProgressEnergyEnergyEnergyEnergy
(in millions) EnergyCarolinasEnergyProgressFloridaOhioIndianaPiedmont
Current income taxes        
Federal $(2)$241 $(15)$113 $(75)$(8)$65 $23 
State 1 23 (4)8 (17)(2)7 3 
Foreign 2 — — — — — — — 
Total current income taxes 1 264 (19)121 (92)(10)72 26 
Deferred income taxes       
Federal 275 (130)203 (16)202 35 19 17 
State — (79)47 (26)77 5 16 (13)
Total deferred income taxes(a)
275 (209)250 (42)279 40 35 4 
ITC amortization (8)(4)(4)(4)— — — — 
Income tax expense from continuing operations 268 51 227 75 187 30 107 30 
Tax benefit from discontinued operations (76)— — — — — — — 
Total income tax expense included in Consolidated Statements of Operations $192 $51 $227 $75 $187 $30 $107 $30 
(a)    Total deferred income taxes includes the generation of NOL carryforwards and tax credit carryforwards of $32 million at Duke Energy Carolinas, $8 million at Duke Energy Indiana, and $3 million at Piedmont. In addition, total deferred income taxes includes utilization of NOL carryforwards and tax credit carryforwards of $250 million at Duke Energy, $95 million at Progress Energy, $14 million at Duke Energy Progress, $64 million at Duke Energy Florida, and $2 million at Duke Energy Ohio.
 Year Ended December 31, 2020
DukeDukeDukeDukeDuke
DukeEnergyProgressEnergyEnergyEnergyEnergy
(in millions)EnergyCarolinasEnergyProgressFloridaOhioIndianaPiedmont
Current income taxes        
Federal $(281)$314 $280 $181 $148 $10 $48 $(27)
State (3)35 29 17 24 1 7 (8)
Foreign 1 — — — — — — — 
Total current income taxes (283)349 309 198 172 11 55 (35)
Deferred income taxes        
Federal 222 (171)(167)(180)1 30 12 60 
State (98)(86)(24)(49)25 2 17 (7)
Total deferred income taxes(a)
124 (257)(191)(229)26 32 29 53 
ITC amortization (10)(4)(5)(5)— — — — 
Income tax (benefit) expense from continuing operations (169)88 113 (36)198 43 84 18 
Tax benefit from discontinued operations (65)— — — — — — — 
Total income tax (benefit) expense included in Consolidated Statements of Operations $(234)$88 $113 $(36)$198 $43 $84 $18 
(a)    Total deferred income taxes includes the generation of NOL carryforwards and tax credit carryforwards of $20 million at Duke Energy Carolinas, $3 million at Duke Energy Progress, $8 million at Duke Energy Indiana, and $11 million at Piedmont. In addition, total deferred income taxes includes utilization of NOL carryforwards and tax credit carryforwards of $39 million at Progress Energy, $30 million at Duke Energy Florida and $189 million at Duke Energy.
Schedule of Income before Income Tax, Domestic and Foreign
Duke Energy Income from Continuing Operations before Income Taxes
 Years Ended December 31,
(in millions)202220212020
Domestic$3,991 $3,947 $907 
Foreign87 44 13 
Income from continuing operations before income taxes$4,078 $3,991 $920 
Summary of Effective Tax Rates
The following tables present a reconciliation of income tax expense at the U.S. federal statutory tax rate to the actual tax expense from continuing operations.
 Year Ended December 31, 2022
DukeDukeDukeDukeDuke
DukeEnergyProgressEnergyEnergyEnergyEnergy
(in millions)EnergyCarolinasEnergyProgressFloridaOhioIndianaPiedmont
Income tax expense, computed at the statutory rate of 21%$856 $362 $457 $245 $238 $59 $24 $76 
State income tax, net of federal income tax effect(17)(23)44 6 48 3 2 (4)
Amortization of excess deferred income tax(481)(195)(133)(74)(59)(79)(48)(23)
AFUDC equity income(41)(20)(14)(11)(3)(1)(2)(2)
AFUDC equity depreciation36 18 12 6 6 1 4 — 
Other tax credits(43)(12)(16)(9)(7)(2)(3)(8)
Other items, net(10)(4)(2)(5)2 (2)(1)— 
Income tax expense from continuing operations$300 $126 $348 $158 $225 $(21)$(24)$39 
Effective tax rate7.4 %7.3 %16.0 %13.6 %19.8 %(7.5)%(21.2)%10.8 %
 Year Ended December 31, 2021
DukeDukeDukeDukeDuke
DukeEnergyProgressEnergyEnergyEnergyEnergy
(in millions)EnergyCarolinasEnergyProgressFloridaOhioIndianaPiedmont
Income tax expense, computed at the statutory rate of 21%$838 $291 $384 $224 $194 $49 $123 $71 
State income tax, net of federal income tax effect1 (44)34 (14)47 2 18 (8)
Amortization of excess deferred income tax(438)(184)(174)(120)(54)(22)(34)(25)
AFUDC equity income(34)(14)(11)(7)(3)(2)(4)(4)
AFUDC equity depreciation35 18 10 5 5 2 5 — 
Other tax credits(30)(12)(11)(8)(3)(1)(2)(4)
Valuation allowance(a)
(85)— — — — — — — 
Other items, net(19)(4)(5)(5)1 2 1 — 
Income tax expense from continuing operations$268 $51 $227 $75 $187 $30 $107 $30 
Effective tax rate6.7 %3.7 %12.4 %7.0 %20.2 %12.8 %18.2 %8.8 %
(a)    In the fourth quarter of 2021, the company recognized a federal capital gain in the amount of $426 million. As a result, a valuation allowance of $85 million related to a federal capital loss carryforward was released. This valuation allowance was originally recorded as a result of the 2019 sale of minority interest of certain renewable assets within the Commercial Renewables Disposal Groups.
 Year Ended December 31, 2020
DukeDukeDukeDukeDuke
DukeEnergyProgressEnergyEnergyEnergyEnergy
(in millions)EnergyCarolinasEnergyProgressFloridaOhioIndianaPiedmont
Income tax expense, computed at the statutory rate of 21%$193 $219 $243 $80 $204 $62 $103 $61 
State income tax, net of federal income tax effect(80)(40)4 (25)39 2 19 (12)
Amortization of excess deferred income tax(276)(82)(118)(68)(49)(20)(36)(21)
AFUDC equity income(48)(13)(9)(6)(3)(2)(4)(10)
AFUDC equity depreciation103 19 10 5 5 1 4 — 
Other tax credits(37)(13)(16)(14)(2)(1)(3)(2)
Tax true up(12)(3)1 (5)5 — (1)1 
Other items, net(12)1 (2)(3)(1)1 2 1 
Income tax (benefit) expense from continuing operations$(169)$88 $113 $(36)$198 $43 $84 $18 
Effective tax rate(18.4)%8.4 %9.7 %(9.5)%20.4 %14.6 %17.1 %6.2 %
Schedule of Deferred Tax Assets and Liabilities
Net Deferred Income Tax Liability Components
The following tables include deferred income tax assets and liabilities related to the Commercial Renewables Disposal Groups. See Note 2 for further details.
 December 31, 2022
DukeDukeDukeDukeDuke
DukeEnergyProgressEnergyEnergyEnergyEnergy
(in millions)EnergyCarolinasEnergyProgressFloridaOhioIndianaPiedmont
Deferred credits and other liabilities $348 $170 $117 $33 $83 $12 $23 $24 
Lease obligations 405 89 263 197 65 4 15 3 
Pension, post-retirement and other employee benefits 192 (1)12 18 (10)9 10 (2)
Progress Energy merger purchase accounting adjustments(a)
301 — — — — — — — 
Tax credits and NOL carryforwards 4,426 444 618 167 412 20 208 37 
Regulatory liabilities and deferred credits— — — — — 3 61 — 
Investments and other assets— — — — — 3 — — 
Other 106 18 22 12 10 5 2 9 
Valuation allowance (519)— — — — — — — 
Total deferred income tax assets 5,259 720 1,032 427 560 56 319 71 
Investments and other assets (1,671)(983)(521)(432)(102)— (12)(28)
Accelerated depreciation rates (11,478)(3,410)(4,358)(1,844)(2,576)(1,192)(1,606)(892)
Regulatory assets and deferred debits, net (2,074)(480)(1,300)(628)(671)— — (21)
Total deferred income tax liabilities (15,223)(4,873)(6,179)(2,904)(3,349)(1,192)(1,618)(941)
Net deferred income tax liabilities$(9,964)$(4,153)$(5,147)$(2,477)$(2,789)$(1,136)$(1,299)$(870)
(a)    Primarily related to lease obligations and debt fair value adjustments.
 December 31, 2021
DukeDukeDukeDukeDuke
DukeEnergyProgressEnergyEnergyEnergyEnergy
(in millions)EnergyCarolinasEnergyProgressFloridaOhioIndianaPiedmont
Deferred credits and other liabilities $347 $121 $101 $60 $40 $19 $7 $18 
Lease obligations 346 91 197 121 76 4 16 4 
Pension, post-retirement and other employee benefits 207 (36)30 17 7 11 20 (8)
Progress Energy merger purchase accounting adjustments(a)
340 — — — — — — — 
Tax credits and NOL carryforwards 3,784 349 497 160 306 13 195 29 
Regulatory liabilities and deferred credits— 11 — — — 16 — 6 
Investments and other assets— — — — — 5 6 — 
Other 85 12 12 7 4 7 2 8 
Valuation allowance (518)— — — — — — — 
Total deferred income tax assets 4,591 548 837 365 433 75 246 57 
Investments and other assets (2,428)(1,205)(742)(610)(135)— — (39)
Accelerated depreciation rates (10,391)(2,977)(3,891)(1,546)(2,382)(1,125)(1,496)(833)
Regulatory assets and deferred debits, net (1,151)— (768)(417)(350)— (53)— 
Total deferred income tax liabilities (13,970)(4,182)(5,401)(2,573)(2,867)(1,125)(1,549)(872)
Net deferred income tax liabilities $(9,379)$(3,634)$(4,564)$(2,208)$(2,434)$(1,050)$(1,303)$(815)
(a)    Primarily related to lease obligations and debt fair value adjustments.
Summary of Tax Credit Carryforwards
The following table presents the expiration of tax credits and NOL carryforwards.
 December 31, 2022
(in millions)AmountExpiration Year
General Business Credits$2,473 2027—2042
Federal NOL carryforwards(a) (e)
306 2024—Indefinite
Charitable contribution carryforwards18 2024—2027
State carryforwards and credits(b) (e)
394 2023—Indefinite
Foreign NOL carryforwards(c)
12 2027—2037
Foreign Tax Credits(d)
1,223 2024—2028
Total tax credits and NOL carryforwards $4,426    
(a)    A valuation allowance of $4 million has been recorded on the Federal NOL carryforwards, as presented in the Net Deferred Income Tax Liability Components table.
(b)    A valuation allowance of $109 million has been recorded on the state NOL and attribute carryforwards, as presented in the Net Deferred Income Tax Liability Components table.
(c)    A valuation allowance of $12 million has been recorded on the foreign NOL carryforwards, as presented in the Net Deferred Income Tax Liability Components table.
(d)    A valuation allowance of $391 million has been recorded on the foreign tax credits, as presented in the Net Deferred Income Tax Liability Components table.
(e)    Indefinite carryforward for Federal NOLs, and NOLs for states that have adopted the Tax Act's NOL provisions, generated in tax years beginning after December 31, 2017.
Schedule of Unrecognized Tax Benefits Roll Forward
The following tables present changes to unrecognized tax benefits.
 Year Ended December 31, 2022
DukeDukeDukeDukeDuke
DukeEnergyProgressEnergyEnergyEnergyEnergy
(in millions)EnergyCarolinasEnergyProgressFloridaOhioIndianaPiedmont
Unrecognized tax benefits – January 1$51 $13 $15 $10 $4 $1 $2 $4 
Gross decreases – tax positions in prior periods— — — — — — — — 
Gross increases – current period tax positions14 4 4 3 1 — — 5 
Total changes14 4 4 3 1 — — 5 
Unrecognized tax benefits – December 31$65 $17 $19 $13 $5 $1 $2 $9 
 Year Ended December 31, 2021
DukeDukeDukeDukeDuke
DukeEnergyProgressEnergyEnergyEnergyEnergy
(in millions)EnergyCarolinasEnergyProgressFloridaOhioIndianaPiedmont
Unrecognized tax benefits – January 1$125 $10 $10 $6 $3 $1 $1 $1 
Gross decreases – tax positions in prior periods(a)
(86)— — — — — — — 
Gross increases – current period tax positions12 3 5 4 1 — 1 3 
Total changes(74)3 5 4 1 — 1 3 
Unrecognized tax benefits – December 31$51 $13 $15 $10 $4 $1 $2 $4 
(a)    In the fourth quarter of 2021, the company recognized a federal capital gain in the amount of $426 million. As a result of the capital gain, a previously recorded unrecognized tax benefit related to the character of a taxable loss has been reversed. See note (a) under the Statutory Rate Reconciliation table for more details.
 Year Ended December 31, 2020
DukeDukeDukeDukeDuke
DukeEnergyProgressEnergyEnergyEnergyEnergy
(in millions)EnergyCarolinasEnergyProgressFloridaOhioIndianaPiedmont
Unrecognized tax benefits – January 1$126 $8 $9 $6 $3 $1 $1 $4 
Gross decreases – tax positions in prior periods(2)— — — — — — — 
Gross increases – current period tax positions4 2 1 — — — — — 
Reduction due to lapse of statute of limitations(3)— — — — — — (3)
Total changes(1)2 1 — — — — (3)
Unrecognized tax benefits – December 31$125 $10 $10 $6 $3 $1 $1 $1 
Summary of Income Tax Contingencies
The following table includes additional information regarding the Duke Energy Registrants' unrecognized tax benefits at December 31, 2022. None of Duke Energy Registrants anticipates a material increase or decrease in unrecognized tax benefits within the next 12 months.
 December 31, 2022
DukeDukeDukeDukeDuke
DukeEnergyProgressEnergyEnergyEnergyEnergy
(in millions)EnergyCarolinasEnergyProgressFloridaOhioIndianaPiedmont
Amount that if recognized, would affect the
effective tax rate or regulatory liability(a)
$59 $17 $18 $13 $5 $1 $2 $8 
(a)    The Duke Energy Registrants are unable to estimate the specific amounts that would affect the ETR versus the regulatory liability.