XML 127 R71.htm IDEA: XBRL DOCUMENT
v3.20.4

Regulatory Matters (Schedule of Regulatory Assets and Liabilities) (Details) - USD ($) $ in Millions | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | $ 14,062 | $ 15,018
Less: current portion | 1,641 | 1,796
Total noncurrent regulatory assets | 12,421 | 13,222
Total regulatory liabilities | 16,406 | 16,048
Less: current portion | 1,377 | 784
Total noncurrent regulatory liabilities | 15,029 | 15,264
Net regulatory liability related to income taxes |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory liabilities | 7,368 | 7,872
Costs of removal |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory liabilities | 5,883 | 5,756
AROs – nuclear and other |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory liabilities | 1,512 | 1,100
Provision for rate refunds |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory liabilities | 344 | 370
Accrued pension and OPEB |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory liabilities | 177 | 176
Amounts to be refunded to customers |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory liabilities | 51 | 34
Deferred fuel and purchased power |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory liabilities | 18 | 1
Other |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory liabilities | 1,053 | 739
AROs – coal ash |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 3,408 | 4,084
AROs – nuclear and other |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 754 | 739
Accrued pension and OPEB |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 2,317 | 2,391
Storm cost deferrals |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 1,102 | 1,399
Nuclear asset securitized balance, net |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 991 | 1,042
Debt fair value adjustment |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 950 | 1,019
Retired generation facilities |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 417 | 331
Post-in-service carrying costs (PISCC) and deferred operating expenses |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 402 | 329
Deferred asset – Lee and Harris COLA |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 356 | 388
Hedge costs deferrals |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 351 | 356
Advanced metering infrastructure (AMI) |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 311 | 338
Demand side management (DSM)/Energy Efficiency (EE) |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 288 | 343
Vacation accrual |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 221 | 214
Deferred fuel and purchased power |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 213 | 528
COR settlement |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 128 | 133
NCEMPA deferrals |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 124 | 72
Nuclear deferral |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 123 | 107
Derivatives – natural gas supply contracts |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 122 | 117
CEP deferral |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 117 | 76
Amounts due from customers |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 110 | 36
Qualifying facility contract buyouts |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 107 | 121
Customer connect project |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 105 | 65
Manufactured gas plant (MGP) |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 104 | 102
ABSAT, coal ash basin closure |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 98 | 65
Deferred pipeline integrity costs |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 92 | 79
Deferred severance charges |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 86 |
Incremental COVID-19 expenses |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 76 |
Other |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 589 | 544
Progress Energy |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 6,533 | 7,292
Less: current portion | 758 | 946
Total noncurrent regulatory assets | 5,775 | 6,346
Total regulatory liabilities | 5,691 | 5,555
Less: current portion | 640 | 330
Total noncurrent regulatory liabilities | 5,051 | 5,225
Progress Energy | Net regulatory liability related to income taxes |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory liabilities | 2,411 | 2,595
Progress Energy | Costs of removal |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory liabilities | 2,666 | 2,561
Progress Energy | Provision for rate refunds |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory liabilities | 123 | 123
Progress Energy | Deferred fuel and purchased power |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory liabilities |  | 1
Progress Energy | Other |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory liabilities | 491 | 275
Progress Energy | AROs – coal ash |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 1,357 | 1,843
Progress Energy | AROs – nuclear and other |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 685 | 668
Progress Energy | Accrued pension and OPEB |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 875 | 897
Progress Energy | Storm cost deferrals |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 893 | 1,214
Progress Energy | Nuclear asset securitized balance, net |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 991 | 1,042
Progress Energy | Retired generation facilities |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 363 | 266
Progress Energy | Post-in-service carrying costs (PISCC) and deferred operating expenses |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 51 | 33
Progress Energy | Deferred asset – Lee and Harris COLA |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 32 | 38
Progress Energy | Hedge costs deferrals |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 148 | 129
Progress Energy | Advanced metering infrastructure (AMI) |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 102 | 114
Progress Energy | Demand side management (DSM)/Energy Efficiency (EE) |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 241 | 241
Progress Energy | Vacation accrual |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 42 | 41
Progress Energy | Deferred fuel and purchased power |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 162 | 305
Progress Energy | COR settlement |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 33 | 35
Progress Energy | NCEMPA deferrals |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 124 | 72
Progress Energy | Nuclear deferral |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 35 | 40
Progress Energy | Qualifying facility contract buyouts |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 107 | 121
Progress Energy | Customer connect project |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 55 | 37
Progress Energy | ABSAT, coal ash basin closure |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 27 | 15
Progress Energy | Deferred severance charges |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 29 |
Progress Energy | Incremental COVID-19 expenses |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 23 |
Progress Energy | Other |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 158 | 141
Duke Energy Carolinas |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 3,469 | 3,910
Less: current portion | 473 | 550
Total noncurrent regulatory assets | 2,996 | 3,360
Total regulatory liabilities | 7,008 | 6,678
Less: current portion | 473 | 255
Total noncurrent regulatory liabilities | 6,535 | 6,423
Duke Energy Carolinas | Net regulatory liability related to income taxes |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory liabilities | 2,874 | 3,060
Duke Energy Carolinas | Costs of removal |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory liabilities | 1,975 | 1,936
Duke Energy Carolinas | AROs – nuclear and other |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory liabilities | 1,512 | 1,100
Duke Energy Carolinas | Provision for rate refunds |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory liabilities | 170 | 175
Duke Energy Carolinas | Accrued pension and OPEB |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory liabilities | 32 | 39
Duke Energy Carolinas | Deferred fuel and purchased power |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory liabilities | 18 |
Duke Energy Carolinas | Other |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory liabilities | 427 | 368
Duke Energy Carolinas | AROs – coal ash |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 1,414 | 1,696
Duke Energy Carolinas | Accrued pension and OPEB |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 427 | 477
Duke Energy Carolinas | Storm cost deferrals |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 205 | 178
Duke Energy Carolinas | Retired generation facilities |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 11 | 16
Duke Energy Carolinas | Post-in-service carrying costs (PISCC) and deferred operating expenses |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 32 | 33
Duke Energy Carolinas | Deferred asset – Lee and Harris COLA |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 324 | 350
Duke Energy Carolinas | Hedge costs deferrals |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 174 | 198
Duke Energy Carolinas | Advanced metering infrastructure (AMI) |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 154 | 166
Duke Energy Carolinas | Demand side management (DSM)/Energy Efficiency (EE) |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 46 | 100
Duke Energy Carolinas | Vacation accrual |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 84 | 80
Duke Energy Carolinas | Deferred fuel and purchased power |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 42 | 222
Duke Energy Carolinas | COR settlement |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 95 | 98
Duke Energy Carolinas | Nuclear deferral |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 88 | 67
Duke Energy Carolinas | Customer connect project |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 50 | 28
Duke Energy Carolinas | ABSAT, coal ash basin closure |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 71 | 50
Duke Energy Carolinas | Deferred severance charges |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 57 |
Duke Energy Carolinas | Incremental COVID-19 expenses |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 31 |
Duke Energy Carolinas | Other |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 164 | 151
Duke Energy Progress |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 4,468 | 4,678
Less: current portion | 492 | 526
Total noncurrent regulatory assets | 3,976 | 4,152
Total regulatory liabilities | 4,924 | 4,468
Less: current portion | 530 | 236
Total noncurrent regulatory liabilities | 4,394 | 4,232
Duke Energy Progress | Net regulatory liability related to income taxes |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory liabilities | 1,662 | 1,802
Duke Energy Progress | Costs of removal |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory liabilities | 2,666 | 2,294
Duke Energy Progress | Provision for rate refunds |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory liabilities | 123 | 123
Duke Energy Progress | Other |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory liabilities | 473 | 249
Duke Energy Progress | AROs – coal ash |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 1,347 | 1,834
Duke Energy Progress | AROs – nuclear and other |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 683 | 509
Duke Energy Progress | Accrued pension and OPEB |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 393 | 423
Duke Energy Progress | Storm cost deferrals |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 785 | 801
Duke Energy Progress | Retired generation facilities |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 189 | 83
Duke Energy Progress | Post-in-service carrying costs (PISCC) and deferred operating expenses |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 51 | 33
Duke Energy Progress | Deferred asset – Lee and Harris COLA |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 32 | 38
Duke Energy Progress | Hedge costs deferrals |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 89 | 85
Duke Energy Progress | Advanced metering infrastructure (AMI) |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 57 | 61
Duke Energy Progress | Demand side management (DSM)/Energy Efficiency (EE) |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 224 | 216
Duke Energy Progress | Vacation accrual |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 42 | 41
Duke Energy Progress | Deferred fuel and purchased power |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 158 | 266
Duke Energy Progress | COR settlement |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 33 | 35
Duke Energy Progress | NCEMPA deferrals |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 124 | 72
Duke Energy Progress | Nuclear deferral |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 35 | 40
Duke Energy Progress | Customer connect project |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 25 | 17
Duke Energy Progress | ABSAT, coal ash basin closure |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 27 | 15
Duke Energy Progress | Deferred severance charges |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 29 |
Duke Energy Progress | Incremental COVID-19 expenses |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 23 |
Duke Energy Progress | Other |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 122 | 109
Duke Energy Florida |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 2,064 | 2,613
Less: current portion | 265 | 419
Total noncurrent regulatory assets | 1,799 | 2,194
Total regulatory liabilities | 768 | 1,087
Less: current portion | 110 | 94
Total noncurrent regulatory liabilities | 658 | 993
Duke Energy Florida | Net regulatory liability related to income taxes |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory liabilities | 749 | 793
Duke Energy Florida | Costs of removal |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory liabilities |  | 267
Duke Energy Florida | Deferred fuel and purchased power |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory liabilities |  | 1
Duke Energy Florida | Other |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory liabilities | 19 | 26
Duke Energy Florida | AROs – coal ash |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 10 | 9
Duke Energy Florida | AROs – nuclear and other |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 2 | 159
Duke Energy Florida | Accrued pension and OPEB |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 482 | 474
Duke Energy Florida | Storm cost deferrals |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 108 | 413
Duke Energy Florida | Nuclear asset securitized balance, net |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 991 | 1,042
Duke Energy Florida | Retired generation facilities |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 174 | 183
Duke Energy Florida | Hedge costs deferrals |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 59 | 44
Duke Energy Florida | Advanced metering infrastructure (AMI) |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 45 | 53
Duke Energy Florida | Demand side management (DSM)/Energy Efficiency (EE) |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 17 | 25
Duke Energy Florida | Deferred fuel and purchased power |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 4 | 39
Duke Energy Florida | Qualifying facility contract buyouts |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 107 | 121
Duke Energy Florida | Customer connect project |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 30 | 20
Duke Energy Florida | Other |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 35 | 31
Duke Energy Ohio |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 649 | 598
Less: current portion | 39 | 49
Total noncurrent regulatory assets | 610 | 549
Total regulatory liabilities | 813 | 827
Less: current portion | 65 | 64
Total noncurrent regulatory liabilities | 748 | 763
Duke Energy Ohio | Net regulatory liability related to income taxes |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory liabilities | 628 | 654
Duke Energy Ohio | Costs of removal |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory liabilities | 68 | 86
Duke Energy Ohio | Provision for rate refunds |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory liabilities | 45 | 31
Duke Energy Ohio | Accrued pension and OPEB |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory liabilities | 17 | 16
Duke Energy Ohio | Other |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory liabilities | 55 | 40
Duke Energy Ohio | AROs – coal ash |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 22 | 16
Duke Energy Ohio | Accrued pension and OPEB |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 149 | 155
Duke Energy Ohio | Storm cost deferrals |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 4 | 7
Duke Energy Ohio | Post-in-service carrying costs (PISCC) and deferred operating expenses |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 16 | 17
Duke Energy Ohio | Hedge costs deferrals |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 7 | 6
Duke Energy Ohio | Advanced metering infrastructure (AMI) |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 36 | 40
Duke Energy Ohio | Demand side management (DSM)/Energy Efficiency (EE) |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 1 | 2
Duke Energy Ohio | Vacation accrual |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 6 | 5
Duke Energy Ohio | Deferred fuel and purchased power |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets |  | 1
Duke Energy Ohio | CEP deferral |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 117 | 76
Duke Energy Ohio | Manufactured gas plant (MGP) |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 104 | 102
Duke Energy Ohio | Deferred pipeline integrity costs |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 21 | 17
Duke Energy Ohio | Other |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 166 | 154
Duke Energy Indiana |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 1,328 | 1,172
Less: current portion | 125 | 90
Total noncurrent regulatory assets | 1,203 | 1,082
Total regulatory liabilities | 1,738 | 1,740
Less: current portion | 111 | 55
Total noncurrent regulatory liabilities | 1,627 | 1,685
Duke Energy Indiana | Net regulatory liability related to income taxes |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory liabilities | 956 | 1,008
Duke Energy Indiana | Costs of removal |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory liabilities | 599 | 599
Duke Energy Indiana | Accrued pension and OPEB |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory liabilities | 100 | 90
Duke Energy Indiana | Amounts to be refunded to customers |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory liabilities | 17 |
Duke Energy Indiana | Other |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory liabilities | 66 | 43
Duke Energy Indiana | AROs – coal ash |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 615 | 529
Duke Energy Indiana | Accrued pension and OPEB |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 245 | 243
Duke Energy Indiana | Retired generation facilities |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 43 | 49
Duke Energy Indiana | Post-in-service carrying costs (PISCC) and deferred operating expenses |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 303 | 246
Duke Energy Indiana | Hedge costs deferrals |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 22 | 23
Duke Energy Indiana | Advanced metering infrastructure (AMI) |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 19 | 18
Duke Energy Indiana | Vacation accrual |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 12 | 12
Duke Energy Indiana | Deferred fuel and purchased power |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 9 |
Duke Energy Indiana | Other |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 60 | 52
Piedmont |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 455 | 363
Less: current portion | 153 | 73
Total noncurrent regulatory assets | 302 | 290
Total regulatory liabilities | 1,132 | 1,212
Less: current portion | 88 | 81
Total noncurrent regulatory liabilities | 1,044 | 1,131
Piedmont | Net regulatory liability related to income taxes |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory liabilities | 499 | 555
Piedmont | Costs of removal |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory liabilities | 575 | 574
Piedmont | Provision for rate refunds |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory liabilities | 6 | 41
Piedmont | Accrued pension and OPEB |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory liabilities | 3 | 3
Piedmont | Amounts to be refunded to customers |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory liabilities | 34 | 34
Piedmont | Other |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory liabilities | 15 | 5
Piedmont | AROs – nuclear and other |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 20 | 16
Piedmont | Accrued pension and OPEB |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 88 | 90
Piedmont | Vacation accrual |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 12 | 12
Piedmont | Derivatives – natural gas supply contracts |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 122 | 117
Piedmont | Amounts due from customers |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 110 | 36
Piedmont | Deferred pipeline integrity costs |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | 71 | 62
Piedmont | Other |  |
Regulatory Assets Liabilities [Line Items] |  |
Total regulatory assets | $ 32 | $ 30

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | duk_RegulatoryAssetsLiabilitiesLineItems
Namespace Prefix: | duk_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount for the individual regulatory asset as itemized in a table of regulatory assets as of the end of the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 980 -SubTopic 340 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6499975&loc=d3e44250-110382 + Details
Name: | us-gaap_RegulatoryAssets
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Carrying amount as of the balance sheet date of capitalized costs of regulated entities that are expected to be recovered through revenue sources within one year or the normal operating cycle, if longer. Such costs are capitalized if they meet both of the following criteria: a. It is probable that future revenue in an amount at least equal to the capitalized cost will result from inclusion of that cost in allowable costs for rate-making purposes. b. Based on available evidence, the future revenue will be provided to permit recovery of the previously incurred cost rather than to provide for expected levels of similar future costs. If the revenue will be provided through an automatic rate-adjustment clause, this criterion requires that the regulator's intent clearly be to permit recovery of the previously incurred cost. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 980 -SubTopic 340 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6499975&loc=d3e44250-110382 + Details
Name: | us-gaap_RegulatoryAssetsCurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Carrying amount as of the balance sheet date of capitalized costs of regulated entities that are not expected to be recovered through revenue sources within one year or the normal operating cycle if longer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 980 -SubTopic 340 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6499975&loc=d3e44250-110382 + Details
Name: | us-gaap_RegulatoryAssetsNoncurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The amount for the individual regulatory liability as itemized in a table of regulatory liabilities as of the end of the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 980 -SubTopic 405 -Section 25 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6500807&loc=d3e48068-110394 + Details
Name: | us-gaap_RegulatoryLiabilities
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The amount for the individual regulatory current liability as itemized in a table of regulatory current liabilities as of the end of the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 980 -SubTopic 405 -Section 25 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6500807&loc=d3e48068-110394 + Details
Name: | us-gaap_RegulatoryLiabilityCurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The amount for the individual regulatory noncurrent liability as itemized in a table of regulatory noncurrent liabilities as of the end of the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.24) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
Name: | us-gaap_RegulatoryLiabilityNoncurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_RegulatoryLiabilityAxis=us-gaap_DeferredIncomeTaxChargesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryLiabilityAxis=us-gaap_RemovalCostsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryLiabilityAxis=us-gaap_AssetRetirementObligationCostsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryLiabilityAxis=duk_RateRefundMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryLiabilityAxis=duk_AccruedPensionAndOPEBMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryLiabilityAxis=us-gaap_RevenueSubjectToRefundMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryLiabilityAxis=us-gaap_DeferredFuelCostsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryLiabilityAxis=us-gaap_OtherRegulatoryAssetsLiabilitiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryAssetAxis=duk_AssetretirementobligationscoalashMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryAssetAxis=us-gaap_AssetRetirementObligationCostsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryAssetAxis=us-gaap_PensionCostsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryAssetAxis=us-gaap_StormCostsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryAssetAxis=duk_NuclearassetsecuritizablebalancenetMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryAssetAxis=duk_DebtFairValueAdjustmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryAssetAxis=duk_RetiredGenerationFacilitiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryAssetAxis=duk_PostInServiceCarryingCostsAndDeferredOperatingExpenseMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryAssetAxis=duk_DeferredAssetLeeCOLAMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryAssetAxis=us-gaap_DeferredDerivativeGainLossMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryAssetAxis=us-gaap_AdvancedMeteringInfrastructureCostsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryAssetAxis=duk_DemandSideManagementAndEnergyEfficiencyAssetMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryAssetAxis=us-gaap_RecoverableVacationPayMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryAssetAxis=us-gaap_DeferredFuelCostsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryAssetAxis=duk_CORSettlementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryAssetAxis=duk_NCEMPAdeferralsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryAssetAxis=duk_NuclearDeferralMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryAssetAxis=duk_DerivativesgassupplycontractsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryAssetAxis=duk_CEPDeferralMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryAssetAxis=duk_AmountsDueFromCustomersMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryAssetAxis=duk_QualifyingFacilityBuyoutMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryAssetAxis=duk_CustomerConnectProjectMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryAssetAxis=duk_ManufacturedGasPlantMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryAssetAxis=duk_ABSATCoalAshBasinClosureMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryAssetAxis=duk_DeferredpipelineintegritymemberMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryAssetAxis=duk_DeferredSeveranceChargesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryAssetAxis=duk_COVIDExpensesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryAssetAxis=us-gaap_OtherRegulatoryAssetsLiabilitiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=duk_ProgressEnergyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=duk_DukeEnergyCarolinasMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=duk_DukeEnergyProgressMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=duk_DukeEnergyFloridaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=duk_DukeEnergyOhioMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=duk_DukeEnergyIndianaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=duk_PiedmontNaturalGasMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |