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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 | Mar. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Asset) | $ 1,108 | $ 320
Location and fair value amounts of derivatives (Liability) | 433 | 472
Current assets |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Asset) | 767 | 204
Noncurrent assets |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Asset) | 341 | 116
Current liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Liability) | 115 | 184
Noncurrent liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Liability) | 318 | 288
Commodity Contracts |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Asset) | 953 | 312
Location and fair value amounts of derivatives (Liability) | 419 | 348
Interest Rate Contracts |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Asset) | 155 | 8
Location and fair value amounts of derivatives (Liability) | 14 | 124
Not Designated as Hedging Instruments | Commodity Contracts | Current assets |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Asset) | 673 | 199
Not Designated as Hedging Instruments | Commodity Contracts | Noncurrent assets |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Asset) | 280 | 113
Not Designated as Hedging Instruments | Commodity Contracts | Current liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Liability) | 61 | 72
Not Designated as Hedging Instruments | Commodity Contracts | Noncurrent liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Liability) | 149 | 132
Not Designated as Hedging Instruments | Interest Rate Contracts | Current assets |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Asset) |  | 2
Not Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent assets |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Asset) | 24 |
Not Designated as Hedging Instruments | Interest Rate Contracts | Current liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Liability) | 1 | 10
Not Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Liability) | 2 | 18
Designated as Hedging Instruments | Commodity Contracts | Current liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Liability) | 49 | 27
Designated as Hedging Instruments | Commodity Contracts | Noncurrent liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Liability) | 160 | 117
Designated as Hedging Instruments | Interest Rate Contracts | Current assets |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Asset) | 94 |
Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent assets |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Asset) | 37 |
Designated as Hedging Instruments | Interest Rate Contracts | Current liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Asset) |  | 3
Location and fair value amounts of derivatives (Liability) | 4 | 75
Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Asset) |  | 3
Location and fair value amounts of derivatives (Liability) | 7 | 21
Duke Energy Carolinas |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Asset) | 493 | 162
Location and fair value amounts of derivatives (Liability) | 37 | 35
Duke Energy Carolinas | Current assets |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Asset) | 335 | 99
Duke Energy Carolinas | Noncurrent assets |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Asset) | 158 | 63
Duke Energy Carolinas | Current liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Liability) | 36 | 26
Duke Energy Carolinas | Noncurrent liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Liability) | 1 | 9
Duke Energy Carolinas | Commodity Contracts |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Asset) | 486 | 162
Location and fair value amounts of derivatives (Liability) | 37 | 27
Duke Energy Carolinas | Interest Rate Contracts |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Asset) | 7 |
Location and fair value amounts of derivatives (Liability) |  | 8
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) | 335 | 99
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) | 151 | 63
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) | 36 | 18
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) | 1 | 9
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) | 7 |
Duke Energy Carolinas | Not Designated as Hedging Instruments | Interest Rate Contracts | Current liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Liability) |  | 8
Progress Energy |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Asset) | 425 | 124
Location and fair value amounts of derivatives (Liability) |  | 24
Progress Energy | Current assets |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Asset) | 295 | 74
Progress Energy | Noncurrent assets |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Asset) | 130 | 50
Progress Energy | Current liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Liability) |  | 19
Progress Energy | Noncurrent liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Liability) |  | 5
Progress Energy | Commodity Contracts |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Asset) | 425 | 122
Location and fair value amounts of derivatives (Liability) |  | 24
Progress Energy | Interest Rate Contracts |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Asset) |  | 2
Progress Energy | Not Designated as Hedging Instruments | Commodity Contracts | Current assets |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Asset) | 295 | 72
Progress Energy | Not Designated as Hedging Instruments | Commodity Contracts | Noncurrent assets |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Asset) | 130 | 50
Progress Energy | Not Designated as Hedging Instruments | Commodity Contracts | Current liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Liability) |  | 19
Progress Energy | Not Designated as Hedging Instruments | Commodity Contracts | Noncurrent liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Liability) |  | 5
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) |  | 2
Duke Energy Progress |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Asset) | 385 | 124
Location and fair value amounts of derivatives (Liability) |  | 10
Duke Energy Progress | Current assets |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Asset) | 255 | 74
Duke Energy Progress | Noncurrent assets |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Asset) | 130 | 50
Duke Energy Progress | Current liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Liability) |  | 5
Duke Energy Progress | Noncurrent liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Liability) |  | 5
Duke Energy Progress | Commodity Contracts |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Asset) | 385 | 122
Location and fair value amounts of derivatives (Liability) |  | 10
Duke Energy Progress | Interest Rate Contracts |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Asset) |  | 2
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) | 255 | 72
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) | 130 | 50
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) |  | 5
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) |  | 5
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) |  | 2
Duke Energy Florida |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Asset) | 40 |
Location and fair value amounts of derivatives (Liability) |  | 14
Duke Energy Florida | Current assets |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Asset) | 40 |
Duke Energy Florida | Current liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Liability) |  | 14
Duke Energy Florida | Commodity Contracts |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Asset) | 40 |
Location and fair value amounts of derivatives (Liability) |  | 14
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) | 40 |
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) |  | 14
Duke Energy Ohio |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Asset) |  | 2
Location and fair value amounts of derivatives (Liability) | 3 | 5
Duke Energy Ohio | Current assets |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Asset) |  | 2
Duke Energy Ohio | Current liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Liability) | 1 | 1
Duke Energy Ohio | Noncurrent liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Liability) | 2 | 4
Duke Energy Ohio | Commodity Contracts |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Asset) |  | 2
Duke Energy Ohio | Interest Rate Contracts |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Liability) | 3 | 5
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
Duke Energy Ohio | Not Designated as Hedging Instruments | Interest Rate Contracts | Current liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Liability) | 1 | 1
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) | 2 | 4
Duke Energy Indiana |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Asset) | 45 | 23
Location and fair value amounts of derivatives (Liability) |  | 27
Duke Energy Indiana | Current assets |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Asset) | 28 | 23
Duke Energy Indiana | Noncurrent assets |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Asset) | 17 |
Duke Energy Indiana | Current liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Liability) |  | 13
Duke Energy Indiana | Noncurrent liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Liability) |  | 14
Duke Energy Indiana | Commodity Contracts |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Asset) | 28 | 23
Location and fair value amounts of derivatives (Liability) |  | 13
Duke Energy Indiana | Interest Rate Contracts |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Asset) | 17 |
Location and fair value amounts of derivatives (Liability) |  | 14
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 | 23
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) |  | 13
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) | 17 |
Duke Energy Indiana | Not Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Liability) |  | 14
Piedmont |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Asset) | 7 | 3
Location and fair value amounts of derivatives (Liability) | 173 | 139
Piedmont | Current assets |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Asset) | 7 | 3
Piedmont | Current liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Liability) | 24 | 21
Piedmont | Noncurrent liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Liability) | 149 | 118
Piedmont | Commodity Contracts |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Asset) | 7 | 3
Location and fair value amounts of derivatives (Liability) | 173 | 139
Piedmont | Not Designated as Hedging Instruments | Commodity Contracts | Current assets |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Asset) | 7 | 3
Piedmont | Not Designated as Hedging Instruments | Commodity Contracts | Current liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Liability) | 24 | 21
Piedmont | Not Designated as Hedging Instruments | Commodity Contracts | Noncurrent liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives (Liability) | $ 149 | $ 118

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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/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 22 -URI http://asc.fasb.org/extlink&oid=99393222&loc=SL20226052-175313 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=99393222&loc=SL20226000-175313 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 20 -Section 50 -Paragraph 4D -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=121570589&loc=SL51823488-111719 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -Subparagraph (a),(c) -URI http://asc.fasb.org/extlink&oid=125515794&loc=SL5624163-113959 + Details
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