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Regulatory Matters (Schedule of Regulatory Assets and Liabilities) (Details) - USD ($) $ in Millions | Jan. 31, 2024 | Dec. 31, 2023 | Aug. 31, 2023 | Jun. 30, 2023 | May 31, 2023 | Mar. 06, 2023 | Feb. 28, 2023 | Dec. 31, 2022
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Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | $ 17,266 |  |  |  |  |  | $ 18,130
Less: Current portion |  | 3,648 |  |  |  |  |  | 3,485
Total noncurrent regulatory assets |  | 13,618 |  |  |  |  |  | 14,645
Total regulatory liabilities |  | 15,408 |  |  |  |  |  | 15,048
Less: Current portion |  | 1,369 |  |  |  |  |  | 1,466
Total noncurrent regulatory liabilities |  | 14,039 |  |  |  |  |  | 13,582
Net regulatory liability related to income taxes |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory liabilities |  | 5,901 |  |  |  |  |  | 6,462
COR regulatory liability |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory liabilities |  | 5,497 |  |  |  |  |  | 5,151
AROs – nuclear and other |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory liabilities |  | 1,673 |  |  |  |  |  | 1,038
Hedge costs deferrals |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory liabilities |  | 443 |  |  |  |  |  | 683
Accrued pension and OPEB |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory liabilities |  | 266 |  |  |  |  |  | 211
Deferred fuel and purchased power |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory liabilities |  | 137 |  |  |  |  |  | 35
DSM/EE |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory liabilities |  | 89 |  |  |  |  |  | 88
DOE Settlement |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory liabilities |  | 32 |  |  |  |  |  | 154
Provision for rate refunds |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory liabilities |  | 15 |  |  |  |  |  | 78
Other |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory liabilities |  | 1,355 |  |  |  |  |  | 1,148
AROs – coal ash |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 3,214 |  |  |  |  |  | 3,205
AROs – nuclear and other |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 1,179 |  |  |  |  |  | 945
Deferred fuel and purchased power |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 2,486 |  |  |  |  |  | 3,866
Accrued pension and OPEB |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 2,389 |  |  |  |  |  | 2,336
Storm cost securitized balance, net |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 890 |  |  |  |  |  | 940
Nuclear asset securitized balance, net |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 830 |  |  |  |  |  | 881
Debt fair value adjustment |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 774 |  |  |  |  |  | 829
Hedge costs deferrals |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 749 |  |  |  |  |  | 378
Storm cost deferrals |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 407 |  |  |  |  |  | 687
COR regulatory asset |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 371 |  |  |  |  |  | 221
Post-in-service carrying costs (PISCC) and deferred operating expenses |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 357 |  |  |  |  |  | 359
Retired generation facilities |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 275 |  |  |  |  |  | 316
Deferred asset – Lee and Harris COLA |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 252 |  |  |  |  |  | 288
Customer connect project |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 251 |  |  |  |  |  | 271
Advanced metering infrastructure (AMI) |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 243 |  |  |  |  |  | 283
Incremental COVID-19 expenses |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 237 |  |  |  |  |  | 210
Vacation accrual |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 228 |  |  |  |  |  | 222
Grid Deferral |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 210 |  |  |  |  |  | 136
Demand side management (DSM)/Energy efficiency (EE) |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 201 |  |  |  |  |  | 189
CEP deferral |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 193 |  |  |  |  |  | 190
NCEMPA deferrals |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 172 |  |  |  |  |  | 157
Derivatives – natural gas supply contracts |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 147 |  |  |  |  |  | 168
Deferred pipeline integrity costs |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 133 |  |  |  |  |  | 121
Nuclear deferral |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 131 |  |  |  |  |  | 154
COR settlement |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 115 |  |  |  |  |  | 120
Decoupling |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 115 |  |  |  |  |  | 42
Deferred coal ash handling system costs |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 86 |  |  |  |  |  | 92
Qualifying facility contract buyouts |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 68 |  |  |  |  |  | 81
Network Integration Transmission Services deferral |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 31 |  |  |  |  |  | 23
Transmission expansion obligation |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 30 |  |  |  |  |  | 31
East Bend deferrals |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 28 |  |  |  |  |  | 33
Propane caverns |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 26 |  |  |  |  |  | 26
Tennessee ARM Deferral |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 20 |  |  |  |  |  | 3
Other |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 428 |  |  |  |  |  | 327
Progress Energy |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 8,091 |  |  |  |  |  | 8,979
Less: Current portion |  | 1,661 |  |  |  |  |  | 1,833
Total noncurrent regulatory assets |  | 6,430 |  |  |  |  |  | 7,146
Total regulatory liabilities |  | 5,501 |  |  |  |  |  | 5,329
Less: Current portion |  | 418 |  |  |  |  |  | 576
Total noncurrent regulatory liabilities |  | 5,083 |  |  |  |  |  | 4,753
Progress Energy | Net regulatory liability related to income taxes |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory liabilities |  | 2,008 |  |  |  |  |  | 2,192
Progress Energy | COR regulatory liability |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory liabilities |  | 2,805 |  |  |  |  |  | 2,269
Progress Energy | Hedge costs deferrals |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory liabilities |  | 208 |  |  |  |  |  | 252
Progress Energy | Deferred fuel and purchased power |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory liabilities |  | 14 |  |  |  |  |  |
Progress Energy | DOE Settlement |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory liabilities |  | 32 |  |  |  |  |  | 154
Progress Energy | Provision for rate refunds |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory liabilities |  | 4 |  |  |  |  |  | 28
Progress Energy | Other |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory liabilities |  | 430 |  |  |  |  |  | 434
Progress Energy | AROs – coal ash |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 1,230 |  |  |  |  |  | 1,429
Progress Energy | AROs – nuclear and other |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 1,127 |  |  |  |  |  | 884
Progress Energy | Deferred fuel and purchased power |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 1,173 |  |  |  |  |  | 2,060
Progress Energy | Accrued pension and OPEB |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 757 |  |  |  |  |  | 759
Progress Energy | Storm cost securitized balance, net |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 682 |  |  |  |  |  | 720
Progress Energy | Nuclear asset securitized balance, net |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 830 |  |  |  |  |  | 881
Progress Energy | Hedge costs deferrals |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 323 |  |  |  |  |  | 128
Progress Energy | Storm cost deferrals |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 298 |  |  |  |  |  | 559
Progress Energy | COR regulatory asset |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 337 |  |  |  |  |  | 221
Progress Energy | Post-in-service carrying costs (PISCC) and deferred operating expenses |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 42 |  |  |  |  |  | 42
Progress Energy | Retired generation facilities |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 220 |  |  |  |  |  | 243
Progress Energy | Deferred asset – Lee and Harris COLA |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 15 |  |  |  |  |  | 21
Progress Energy | Customer connect project |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 125 |  |  |  |  |  | 136
Progress Energy | Advanced metering infrastructure (AMI) |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 92 |  |  |  |  |  | 111
Progress Energy | Incremental COVID-19 expenses |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 80 |  |  |  |  |  | 78
Progress Energy | Vacation accrual |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 43 |  |  |  |  |  | 43
Progress Energy | Grid Deferral |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 51 |  |  |  |  |  | 40
Progress Energy | Demand side management (DSM)/Energy efficiency (EE) |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 191 |  |  |  |  |  | 188
Progress Energy | NCEMPA deferrals |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 172 |  |  |  |  |  | 157
Progress Energy | Nuclear deferral |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 42 |  |  |  |  |  | 64
Progress Energy | COR settlement |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 30 |  |  |  |  |  | 32
Progress Energy | Decoupling |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 15 |  |  |  |  |  |
Progress Energy | Deferred coal ash handling system costs |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 21 |  |  |  |  |  | 25
Progress Energy | Qualifying facility contract buyouts |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 68 |  |  |  |  |  | 81
Progress Energy | Other |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 127 |  |  |  |  |  | 77
Duke Energy Carolinas |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 5,480 |  |  |  |  |  | 5,388
Less: Current portion |  | 1,564 |  |  |  |  |  | 1,095
Total noncurrent regulatory assets |  | 3,916 |  |  |  |  |  | 4,293
Total regulatory liabilities |  | 6,577 |  |  |  |  |  | 6,313
Less: Current portion |  | 587 |  |  |  |  |  | 530
Total noncurrent regulatory liabilities |  | 5,990 |  |  |  |  |  | 5,783
Duke Energy Carolinas | Net regulatory liability related to income taxes |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory liabilities |  | 2,200 |  |  |  |  |  | 2,475
Duke Energy Carolinas | COR regulatory liability |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory liabilities |  | 1,641 |  |  |  |  |  | 1,769
Duke Energy Carolinas | AROs – nuclear and other |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory liabilities |  | 1,673 |  |  |  |  |  | 1,038
Duke Energy Carolinas | Hedge costs deferrals |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory liabilities |  | 158 |  |  |  |  |  | 350
Duke Energy Carolinas | Accrued pension and OPEB |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory liabilities |  | 106 |  |  |  |  |  | 44
Duke Energy Carolinas | Deferred fuel and purchased power |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory liabilities |  | 85 |  |  |  |  |  |
Duke Energy Carolinas | DSM/EE |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory liabilities |  | 87 |  |  |  |  |  | 86
Duke Energy Carolinas | Provision for rate refunds |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory liabilities |  | 11 |  |  |  |  |  | 50
Duke Energy Carolinas | Other |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory liabilities |  | 616 |  |  |  |  |  | 501
Duke Energy Carolinas | AROs – coal ash |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 1,559 |  |  |  |  |  | 1,391
Duke Energy Carolinas | Deferred fuel and purchased power |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 1,293 |  |  |  |  |  | 1,614
Duke Energy Carolinas | Deferred fuel and purchased power | NCUC |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  |  |  |  |  |  | $ 998 |
Duke Energy Carolinas | Deferred fuel and purchased power | PSCSC |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  |  | $ 310 |  |  |  |  |
Duke Energy Carolinas | Accrued pension and OPEB |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 671 |  |  |  |  |  | 614
Duke Energy Carolinas | Storm cost securitized balance, net |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 208 |  |  |  |  |  | 220
Duke Energy Carolinas | Hedge costs deferrals |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 405 |  |  |  |  |  | 228
Duke Energy Carolinas | Storm cost deferrals |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 97 |  |  |  |  |  | 114
Duke Energy Carolinas | Post-in-service carrying costs (PISCC) and deferred operating expenses |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 48 |  |  |  |  |  | 47
Duke Energy Carolinas | Retired generation facilities |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 26 |  |  |  |  |  | 39
Duke Energy Carolinas | Deferred asset – Lee and Harris COLA |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 237 |  |  |  |  |  | 267
Duke Energy Carolinas | Customer connect project |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 58 |  |  |  |  |  | 62
Duke Energy Carolinas | Advanced metering infrastructure (AMI) |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 125 |  |  |  |  |  | 139
Duke Energy Carolinas | Incremental COVID-19 expenses |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 152 |  |  |  |  |  | 127
Duke Energy Carolinas | Vacation accrual |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 87 |  |  |  |  |  | 84
Duke Energy Carolinas | Grid Deferral |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 159 |  |  |  |  |  | 96
Duke Energy Carolinas | Nuclear deferral |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 89 |  |  |  |  |  | 90
Duke Energy Carolinas | COR settlement |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 85 |  |  |  |  |  | 88
Duke Energy Carolinas | Deferred coal ash handling system costs |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 65 |  |  |  |  |  | 67
Duke Energy Carolinas | Other |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 116 |  |  |  |  |  | 101
Duke Energy Progress |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 5,488 |  |  |  |  |  | 5,414
Less: Current portion |  | 942 |  |  |  |  |  | 690
Total noncurrent regulatory assets |  | 4,546 |  |  |  |  |  | 4,724
Total regulatory liabilities |  | 4,675 |  |  |  |  |  | 4,452
Less: Current portion |  | 300 |  |  |  |  |  | 332
Total noncurrent regulatory liabilities |  | 4,375 |  |  |  |  |  | 4,120
Duke Energy Progress | Net regulatory liability related to income taxes |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory liabilities |  | 1,420 |  |  |  |  |  | 1,559
Duke Energy Progress | COR regulatory liability |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory liabilities |  | 2,805 |  |  |  |  |  | 2,269
Duke Energy Progress | Hedge costs deferrals |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory liabilities |  | 87 |  |  |  |  |  | 252
Duke Energy Progress | Deferred fuel and purchased power |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory liabilities |  | 14 |  |  |  |  |  |
Duke Energy Progress | Provision for rate refunds |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory liabilities |  | 4 |  |  |  |  |  | 28
Duke Energy Progress | Other |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory liabilities |  | 345 |  |  |  |  |  | 344
Duke Energy Progress | AROs – coal ash |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 1,218 |  |  |  |  |  | 1,418
Duke Energy Progress | AROs – nuclear and other |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 1,110 |  |  |  |  |  | 869
Duke Energy Progress | Deferred fuel and purchased power |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 579 |  |  |  |  |  | 705
Duke Energy Progress | Deferred fuel and purchased power | NCUC |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  |  |  | $ 445 |  |  |  |
Duke Energy Progress | Deferred fuel and purchased power | PSCSC |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  |  |  |  | $ 79 |  |  |
Duke Energy Progress | Accrued pension and OPEB |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 408 |  |  |  |  |  | 417
Duke Energy Progress | Storm cost securitized balance, net |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 682 |  |  |  |  |  | 720
Duke Energy Progress | Hedge costs deferrals |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 260 |  |  |  |  |  | 55
Duke Energy Progress | Storm cost deferrals |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 228 |  |  |  |  |  | 234
Duke Energy Progress | Post-in-service carrying costs (PISCC) and deferred operating expenses |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 42 |  |  |  |  |  | 42
Duke Energy Progress | Retired generation facilities |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 126 |  |  |  |  |  | 149
Duke Energy Progress | Deferred asset – Lee and Harris COLA |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 15 |  |  |  |  |  | 21
Duke Energy Progress | Customer connect project |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 49 |  |  |  |  |  | 54
Duke Energy Progress | Advanced metering infrastructure (AMI) |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 68 |  |  |  |  |  | 81
Duke Energy Progress | Incremental COVID-19 expenses |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 80 |  |  |  |  |  | 78
Duke Energy Progress | Vacation accrual |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 43 |  |  |  |  |  | 43
Duke Energy Progress | Grid Deferral |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 51 |  |  |  |  |  | 40
Duke Energy Progress | Demand side management (DSM)/Energy efficiency (EE) |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 182 |  |  |  |  |  | 180
Duke Energy Progress | NCEMPA deferrals |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 172 |  |  |  |  |  | 157
Duke Energy Progress | Nuclear deferral |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 42 |  |  |  |  |  | 64
Duke Energy Progress | COR settlement |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 30 |  |  |  |  |  | 32
Duke Energy Progress | Decoupling |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 15 |  |  |  |  |  |
Duke Energy Progress | Deferred coal ash handling system costs |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 21 |  |  |  |  |  | 25
Duke Energy Progress | Other |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 67 |  |  |  |  |  | 30
Duke Energy Florida |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 2,603 |  |  |  |  |  | 3,565
Less: Current portion |  | 720 |  |  |  |  |  | 1,143
Total noncurrent regulatory assets |  | 1,883 |  |  |  |  |  | 2,422
Total regulatory liabilities |  | 826 |  |  |  |  |  | 877
Less: Current portion |  | 118 |  |  |  |  |  | 244
Total noncurrent regulatory liabilities |  | 708 |  |  |  |  |  | 633
Duke Energy Florida | Net regulatory liability related to income taxes |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory liabilities |  | 588 |  |  |  |  |  | 633
Duke Energy Florida | Hedge costs deferrals |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory liabilities |  | 121 |  |  |  |  |  |
Duke Energy Florida | DOE Settlement |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory liabilities |  | 32 |  |  |  |  |  | 154
Duke Energy Florida | Other |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory liabilities |  | 85 |  |  |  |  |  | 90
Duke Energy Florida | AROs – coal ash |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 12 |  |  |  |  |  | 11
Duke Energy Florida | AROs – nuclear and other |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 17 |  |  |  |  |  | 15
Duke Energy Florida | Deferred fuel and purchased power |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 594 |  |  |  |  |  | 1,355
Duke Energy Florida | Deferred fuel and purchased power | FPSC |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  |  |  |  |  | $ 469 |  | 1,200
Duke Energy Florida | Deferred fuel and purchased power | FPSC | Subsequent Event |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets | $ 120 |  |  |  |  |  |  |
Duke Energy Florida | Accrued pension and OPEB |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 349 |  |  |  |  |  | 342
Duke Energy Florida | Nuclear asset securitized balance, net |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 830 |  |  |  |  |  | 881
Duke Energy Florida | Hedge costs deferrals |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 63 |  |  |  |  |  | 73
Duke Energy Florida | Storm cost deferrals |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 70 |  |  |  |  |  | 325
Duke Energy Florida | COR regulatory asset |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 337 |  |  |  |  |  | 221
Duke Energy Florida | Retired generation facilities |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 94 |  |  |  |  |  | 94
Duke Energy Florida | Customer connect project |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 76 |  |  |  |  |  | 82
Duke Energy Florida | Advanced metering infrastructure (AMI) |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 24 |  |  |  |  |  | 30
Duke Energy Florida | Qualifying facility contract buyouts |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 68 |  |  |  |  |  | 81
Duke Energy Florida | Other |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 69 |  |  |  |  |  | 55
Duke Energy Ohio |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 749 |  |  |  |  |  | 684
Less: Current portion |  | 73 |  |  |  |  |  | 103
Total noncurrent regulatory assets |  | 676 |  |  |  |  |  | 581
Total regulatory liabilities |  | 553 |  |  |  |  |  | 633
Less: Current portion |  | 56 |  |  |  |  |  | 99
Total noncurrent regulatory liabilities |  | 497 |  |  |  |  |  | 534
Duke Energy Ohio | Net regulatory liability related to income taxes |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory liabilities |  | 466 |  |  |  |  |  | 496
Duke Energy Ohio | COR regulatory liability |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory liabilities |  |  |  |  |  |  |  | 9
Duke Energy Ohio | Accrued pension and OPEB |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory liabilities |  | 17 |  |  |  |  |  | 21
Duke Energy Ohio | Deferred fuel and purchased power |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory liabilities |  | 15 |  |  |  |  |  | 35
Duke Energy Ohio | Other |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory liabilities |  | 55 |  |  |  |  |  | 72
Duke Energy Ohio | AROs – coal ash |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 17 |  |  |  |  |  |
Duke Energy Ohio | Deferred fuel and purchased power |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 20 |  |  |  |  |  | 54
Duke Energy Ohio | Accrued pension and OPEB |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 123 |  |  |  |  |  | 129
Duke Energy Ohio | Storm cost deferrals |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 12 |  |  |  |  |  | 14
Duke Energy Ohio | COR regulatory asset |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 34 |  |  |  |  |  |
Duke Energy Ohio | Post-in-service carrying costs (PISCC) and deferred operating expenses |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 15 |  |  |  |  |  | 15
Duke Energy Ohio | Customer connect project |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 49 |  |  |  |  |  | 54
Duke Energy Ohio | Advanced metering infrastructure (AMI) |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 13 |  |  |  |  |  | 18
Duke Energy Ohio | CEP deferral |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 193 |  |  |  |  |  | 190
Duke Energy Ohio | Deferred pipeline integrity costs |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 30 |  |  |  |  |  | 28
Duke Energy Ohio | Deferred coal ash handling system costs |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 25 |  |  |  |  |  |
Duke Energy Ohio | Network Integration Transmission Services deferral |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 31 |  |  |  |  |  | 23
Duke Energy Ohio | Transmission expansion obligation |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 30 |  |  |  |  |  | 31
Duke Energy Ohio | East Bend deferrals |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 28 |  |  |  |  |  | 33
Duke Energy Ohio | Propane caverns |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 26 |  |  |  |  |  | 26
Duke Energy Ohio | Other |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 103 |  |  |  |  |  | 69
Duke Energy Indiana |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 996 |  |  |  |  |  | 1,124
Less: Current portion |  | 102 |  |  |  |  |  | 249
Total noncurrent regulatory assets |  | 894 |  |  |  |  |  | 875
Total regulatory liabilities |  | 1,668 |  |  |  |  |  | 1,641
Less: Current portion |  | 209 |  |  |  |  |  | 187
Total noncurrent regulatory liabilities |  | 1,459 |  |  |  |  |  | 1,454
Duke Energy Indiana | Net regulatory liability related to income taxes |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory liabilities |  | 794 |  |  |  |  |  | 840
Duke Energy Indiana | COR regulatory liability |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory liabilities |  | 496 |  |  |  |  |  | 531
Duke Energy Indiana | Hedge costs deferrals |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory liabilities |  | 77 |  |  |  |  |  | 81
Duke Energy Indiana | Accrued pension and OPEB |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory liabilities |  | 109 |  |  |  |  |  | 104
Duke Energy Indiana | Deferred fuel and purchased power |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory liabilities |  | 23 |  |  |  |  |  |
Duke Energy Indiana | Other |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory liabilities |  | 169 |  |  |  |  |  | 85
Duke Energy Indiana | AROs – coal ash |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 408 |  |  |  |  |  | 385
Duke Energy Indiana | Deferred fuel and purchased power |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  |  |  |  |  |  |  | 138
Duke Energy Indiana | Accrued pension and OPEB |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 208 |  |  |  |  |  | 214
Duke Energy Indiana | Hedge costs deferrals |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 19 |  |  |  |  |  | 20
Duke Energy Indiana | Post-in-service carrying costs (PISCC) and deferred operating expenses |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 252 |  |  |  |  |  | 255
Duke Energy Indiana | Retired generation facilities |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 29 |  |  |  |  |  | 34
Duke Energy Indiana | Customer connect project |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 19 |  |  |  |  |  | 19
Duke Energy Indiana | Advanced metering infrastructure (AMI) |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 13 |  |  |  |  |  | 15
Duke Energy Indiana | Other |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 48 |  |  |  |  |  | 44
Piedmont |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 571 |  |  |  |  |  | 511
Less: Current portion |  | 161 |  |  |  |  |  | 119
Total noncurrent regulatory assets |  | 410 |  |  |  |  |  | 392
Total regulatory liabilities |  | 1,086 |  |  |  |  |  | 1,098
Less: Current portion |  | 98 |  |  |  |  |  | 74
Total noncurrent regulatory liabilities |  | 988 |  |  |  |  |  | 1,024
Piedmont | Net regulatory liability related to income taxes |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory liabilities |  | 433 |  |  |  |  |  | 459
Piedmont | COR regulatory liability |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory liabilities |  | 555 |  |  |  |  |  | 573
Piedmont | Other |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory liabilities |  | 98 |  |  |  |  |  | 66
Piedmont | AROs – nuclear and other |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 26 |  |  |  |  |  | 27
Piedmont | Accrued pension and OPEB |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 129 |  |  |  |  |  | 119
Piedmont | Vacation accrual |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 13 |  |  |  |  |  | 12
Piedmont | Derivatives – natural gas supply contracts |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 147 |  |  |  |  |  | 168
Piedmont | Deferred pipeline integrity costs |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 103 |  |  |  |  |  | 93
Piedmont | Decoupling |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 75 |  |  |  |  |  | 42
Piedmont | Tennessee ARM Deferral |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | 20 |  |  |  |  |  | 3
Piedmont | Other |  |  |  |  |  |  |  |
Regulatory Assets Liabilities [Line Items] |  |  |  |  |  |  |  |
Total regulatory assets |  | $ 58 |  |  |  |  |  | $ 47

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