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Derivatives and Hedging (Location and Fair Value Amounts of Derivatives Reflected in the Condensed Consolidated Balance Sheets) (Details) - USD ($) $ in Millions | Sep. 30, 2023 | Dec. 31, 2022
--- | --- | ---
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Asset) | $ 525 | $ 795
Location and fair value amounts of derivatives (Liability) | 520 | 437
Current assets |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Asset) | 161 | 582
Noncurrent assets |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Asset) | 364 | 213
Current liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Liability) | 293 | 193
Noncurrent liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Liability) | 227 | 244
Commodity Contracts |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Asset) | 143 | 478
Location and fair value amounts of derivatives (Liability) | 490 | 377
Interest Rate Contracts |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Asset) | 382 | 317
Location and fair value amounts of derivatives (Liability) | 1 | 2
Foreign Currency Contracts |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Liability) | 29 |
Equity Securities Contract |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Liability) |  | 58
Not Designated as Hedging Instruments | Commodity Contracts | Current assets |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Asset) | 57 | 265
Not Designated as Hedging Instruments | Commodity Contracts | Noncurrent assets |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Asset) | 86 | 213
Not Designated as Hedging Instruments | Commodity Contracts | Current liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Liability) | 275 | 175
Not Designated as Hedging Instruments | Commodity Contracts | Noncurrent liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Liability) | 215 | 202
Not Designated as Hedging Instruments | Interest Rate Contracts | Current assets |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Asset) | 104 | 216
Not Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent assets |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Asset) | 101 |
Not Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Liability) | 1 | 2
Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent assets |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Asset) | 177 |
Designated as Hedging Instruments | Interest Rate Contracts | Current liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Asset) |  | 101
Designated as Hedging Instruments | Foreign Currency Contracts | Current liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Liability) | 18 | 18
Designated as Hedging Instruments | Foreign Currency Contracts | Noncurrent liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Liability) | 11 | 40
Duke Energy Carolinas |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Asset) | 93 | 330
Location and fair value amounts of derivatives (Liability) | 204 | 127
Duke Energy Carolinas | Current assets |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Asset) | 37 | 226
Duke Energy Carolinas | Noncurrent assets |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Asset) | 56 | 104
Duke Energy Carolinas | Current liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Liability) | 156 | 96
Duke Energy Carolinas | Noncurrent liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Liability) | 48 | 31
Duke Energy Carolinas | Commodity Contracts |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Asset) | 51 | 236
Location and fair value amounts of derivatives (Liability) | 204 | 127
Duke Energy Carolinas | Interest Rate Contracts |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Asset) | 42 | 94
Duke Energy Carolinas | Not Designated as Hedging Instruments | Commodity Contracts | Current assets |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Asset) | 11 | 132
Duke Energy Carolinas | Not Designated as Hedging Instruments | Commodity Contracts | Noncurrent assets |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Asset) | 40 | 104
Duke Energy Carolinas | Not Designated as Hedging Instruments | Commodity Contracts | Current liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Liability) | 156 | 96
Duke Energy Carolinas | Not Designated as Hedging Instruments | Commodity Contracts | Noncurrent liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Liability) | 48 | 31
Duke Energy Carolinas | Not Designated as Hedging Instruments | Interest Rate Contracts | Current assets |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Asset) | 26 | 94
Duke Energy Carolinas | Not Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent assets |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Asset) | 16 |
Progress Energy |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Asset) | 196 | 248
Location and fair value amounts of derivatives (Liability) | 137 | 66
Progress Energy | Current assets |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Asset) | 92 | 140
Progress Energy | Noncurrent assets |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Asset) | 104 | 108
Progress Energy | Current liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Liability) | 97 | 36
Progress Energy | Noncurrent liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Liability) | 40 | 30
Progress Energy | Commodity Contracts |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Asset) | 60 | 207
Location and fair value amounts of derivatives (Liability) | 137 | 66
Progress Energy | Interest Rate Contracts |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Asset) | 136 | 41
Progress Energy | Not Designated as Hedging Instruments | Commodity Contracts | Current assets |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Asset) | 14 | 99
Progress Energy | Not Designated as Hedging Instruments | Commodity Contracts | Noncurrent assets |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Asset) | 46 | 108
Progress Energy | Not Designated as Hedging Instruments | Commodity Contracts | Current liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Liability) | 97 | 36
Progress Energy | Not Designated as Hedging Instruments | Commodity Contracts | Noncurrent liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Liability) | 40 | 30
Progress Energy | Not Designated as Hedging Instruments | Interest Rate Contracts | Current assets |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Asset) | 78 | 41
Progress Energy | Not Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent assets |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Asset) | 58 |
Duke Energy Progress |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Asset) | 79 | 230
Location and fair value amounts of derivatives (Liability) | 137 | 48
Duke Energy Progress | Current assets |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Asset) | 9 | 122
Duke Energy Progress | Noncurrent assets |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Asset) | 70 | 108
Duke Energy Progress | Current liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Liability) | 97 | 18
Duke Energy Progress | Noncurrent liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Liability) | 40 | 30
Duke Energy Progress | Commodity Contracts |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Asset) | 55 | 207
Location and fair value amounts of derivatives (Liability) | 137 | 48
Duke Energy Progress | Interest Rate Contracts |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Asset) | 24 | 23
Duke Energy Progress | Not Designated as Hedging Instruments | Commodity Contracts | Current assets |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Asset) | 9 | 99
Duke Energy Progress | Not Designated as Hedging Instruments | Commodity Contracts | Noncurrent assets |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Asset) | 46 | 108
Duke Energy Progress | Not Designated as Hedging Instruments | Commodity Contracts | Current liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Liability) | 97 | 18
Duke Energy Progress | Not Designated as Hedging Instruments | Commodity Contracts | Noncurrent liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Liability) | 40 | 30
Duke Energy Progress | Not Designated as Hedging Instruments | Interest Rate Contracts | Current assets |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Asset) |  | 23
Duke Energy Progress | Not Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent assets |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Asset) | 24 |
Duke Energy Florida |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Asset) | 117 | 17
Location and fair value amounts of derivatives (Liability) |  | 19
Duke Energy Florida | Current assets |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Asset) | 83 | 17
Duke Energy Florida | Noncurrent assets |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Asset) | 34 |
Duke Energy Florida | Current liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Liability) |  | 19
Duke Energy Florida | Commodity Contracts |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Asset) | 5 |
Location and fair value amounts of derivatives (Liability) |  | 19
Duke Energy Florida | Interest Rate Contracts |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Asset) | 112 | 17
Duke Energy Florida | Not Designated as Hedging Instruments | Commodity Contracts | Current assets |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Asset) | 5 |
Duke Energy Florida | Not Designated as Hedging Instruments | Commodity Contracts | Current liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Liability) |  | 19
Duke Energy Florida | Not Designated as Hedging Instruments | Interest Rate Contracts | Current assets |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Asset) | 78 | 17
Duke Energy Florida | Not Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent assets |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Asset) | 34 |
Duke Energy Ohio |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Asset) | 2 | 5
Location and fair value amounts of derivatives (Liability) | 1 | 2
Duke Energy Ohio | Current assets |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Asset) | 2 | 5
Duke Energy Ohio | Noncurrent liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Liability) | 1 | 2
Duke Energy Ohio | Commodity Contracts |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Asset) | 2 | 5
Duke Energy Ohio | Interest Rate Contracts |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Liability) | 1 | 2
Duke Energy Ohio | Not Designated as Hedging Instruments | Commodity Contracts | Current assets |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Asset) | 2 | 5
Duke Energy Ohio | Not Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Liability) | 1 | 2
Duke Energy Indiana |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Asset) | 55 | 110
Location and fair value amounts of derivatives (Liability) | 4 | 16
Duke Energy Indiana | Current assets |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Asset) | 28 | 110
Duke Energy Indiana | Noncurrent assets |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Asset) | 27 |
Duke Energy Indiana | Current liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Liability) | 4 | 16
Duke Energy Indiana | Commodity Contracts |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Asset) | 28 | 29
Location and fair value amounts of derivatives (Liability) | 4 | 16
Duke Energy Indiana | Interest Rate Contracts |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Asset) | 27 | 81
Duke Energy Indiana | Not Designated as Hedging Instruments | Commodity Contracts | Current assets |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Asset) | 28 | 29
Duke Energy Indiana | Not Designated as Hedging Instruments | Commodity Contracts | Current liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Liability) | 4 | 16
Duke Energy Indiana | Not Designated as Hedging Instruments | Interest Rate Contracts | Current assets |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Asset) |  | 81
Duke Energy Indiana | Not Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent assets |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Asset) | 27 |
Piedmont |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Asset) | 1 |
Location and fair value amounts of derivatives (Liability) | 145 | 168
Piedmont | Current assets |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Asset) | 1 |
Piedmont | Current liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Liability) | 18 | 27
Piedmont | Noncurrent liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Liability) | 127 | 141
Piedmont | Commodity Contracts |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Asset) | 1 |
Location and fair value amounts of derivatives (Liability) | 145 | 168
Piedmont | Not Designated as Hedging Instruments | Commodity Contracts | Current assets |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Asset) | 1 |
Piedmont | Not Designated as Hedging Instruments | Commodity Contracts | Current liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Liability) | 18 | 27
Piedmont | Not Designated as Hedging Instruments | Commodity Contracts | Noncurrent liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Liability) | $ 127 | $ 141

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- Definition Fair value, before effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets elected not to be offset. Excludes assets not subject to a master netting arrangement. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 210 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 22 -Publisher FASB -URI https://asc.fasb.org//1943274/2147483444/210-20-55-22 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 210 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483466/210-20-50-3 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 7 -Publisher FASB -URI https://asc.fasb.org//1943274/2147483444/210-20-55-7 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -Subparagraph (a),(c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480434/815-10-50-4B Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 4D -Subparagraph (c)(2) -SubTopic 20 -Topic 860 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481326/860-20-50-4D + Details
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