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Derivatives and Hedging (Location and Fair Value Amounts of Derivatives Reflected in the Consolidated Balance Sheets) (Details) - USD ($) $ in Millions | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives assets | $ 320 | $ 61
Location and fair value amounts of derivatives liabilities | 472 | 324
Current Assets |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives assets | 204 | 48
Noncurrent assets |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives assets | 116 | 13
Current Liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives liabilities | 184 | 64
Noncurrent Liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives liabilities | 288 | 260
Commodity Contracts |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives assets | 312 | 43
Location and fair value amounts of derivatives liabilities | 348 | 251
Interest Rate Contracts |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives assets | 8 | 18
Location and fair value amounts of derivatives liabilities | 124 | 73
Designated as Hedging Instruments | Commodity Contracts | Current Liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives liabilities | 27 | 14
Designated as Hedging Instruments | Commodity Contracts | Noncurrent Liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives liabilities | 117 | 70
Designated as Hedging Instruments | Interest Rate Contracts | Current Assets |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives assets | 3 |
Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent assets |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives assets | 3 |
Designated as Hedging Instruments | Interest Rate Contracts | Current Liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives liabilities | 75 | 15
Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent Liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives liabilities | 21 | 48
Not Designated as Hedging Instruments | Commodity Contracts | Current Assets |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives assets | 199 | 30
Not Designated as Hedging Instruments | Commodity Contracts | Noncurrent assets |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives assets | 113 | 13
Not Designated as Hedging Instruments | Commodity Contracts | Current Liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives liabilities | 72 | 30
Not Designated as Hedging Instruments | Commodity Contracts | Noncurrent Liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives liabilities | 132 | 137
Not Designated as Hedging Instruments | Interest Rate Contracts | Current Assets |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives assets | 2 | 18
Not Designated as Hedging Instruments | Interest Rate Contracts | Current Liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives liabilities | 10 | 5
Not Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent Liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives liabilities | 18 | 5
Duke Energy Carolinas |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives assets | 162 | 20
Location and fair value amounts of derivatives liabilities | 35 | 20
Duke Energy Carolinas | Current Assets |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives assets | 99 | 14
Duke Energy Carolinas | Noncurrent assets |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives assets | 63 | 6
Duke Energy Carolinas | Current Liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives liabilities | 26 | 17
Duke Energy Carolinas | Noncurrent Liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives liabilities | 9 | 3
Duke Energy Carolinas | Commodity Contracts |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives assets | 162 | 20
Location and fair value amounts of derivatives liabilities | 27 | 16
Duke Energy Carolinas | Interest Rate Contracts |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives liabilities | 8 | 4
Duke Energy Carolinas | Not Designated as Hedging Instruments | Commodity Contracts | Current Assets |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives assets | 99 | 14
Duke Energy Carolinas | Not Designated as Hedging Instruments | Commodity Contracts | Noncurrent assets |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives assets | 63 | 6
Duke Energy Carolinas | Not Designated as Hedging Instruments | Commodity Contracts | Current Liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives liabilities | 18 | 13
Duke Energy Carolinas | Not Designated as Hedging Instruments | Commodity Contracts | Noncurrent Liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives liabilities | 9 | 3
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 liabilities | 8 | 4
Progress Energy |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives assets | 124 | 33
Location and fair value amounts of derivatives liabilities | 24 | 29
Progress Energy | Current Assets |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives assets | 74 | 27
Progress Energy | Noncurrent assets |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives assets | 50 | 6
Progress Energy | Current Liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives liabilities | 19 | 2
Progress Energy | Noncurrent Liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives liabilities | 5 | 27
Progress Energy | Commodity Contracts |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives assets | 122 | 15
Location and fair value amounts of derivatives liabilities | 24 | 29
Progress Energy | Interest Rate Contracts |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives assets | 2 | 18
Progress Energy | Not Designated as Hedging Instruments | Commodity Contracts | Current Assets |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives assets | 72 | 9
Progress Energy | Not Designated as Hedging Instruments | Commodity Contracts | Noncurrent assets |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives assets | 50 | 6
Progress Energy | Not Designated as Hedging Instruments | Commodity Contracts | Current Liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives liabilities | 19 | 2
Progress Energy | Not Designated as Hedging Instruments | Commodity Contracts | Noncurrent Liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives liabilities | 5 | 27
Progress Energy | Not Designated as Hedging Instruments | Interest Rate Contracts | Current Assets |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives assets | 2 | 18
Duke Energy Progress |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives assets | 124 | 33
Location and fair value amounts of derivatives liabilities | 10 | 14
Duke Energy Progress | Current Assets |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives assets | 74 | 27
Duke Energy Progress | Noncurrent assets |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives assets | 50 | 6
Duke Energy Progress | Current Liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives liabilities | 5 | 2
Duke Energy Progress | Noncurrent Liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives liabilities | 5 | 12
Duke Energy Progress | Commodity Contracts |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives assets | 122 | 15
Location and fair value amounts of derivatives liabilities | 10 | 14
Duke Energy Progress | Interest Rate Contracts |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives assets | 2 | 18
Duke Energy Progress | Not Designated as Hedging Instruments | Commodity Contracts | Current Assets |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives assets | 72 | 9
Duke Energy Progress | Not Designated as Hedging Instruments | Commodity Contracts | Noncurrent assets |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives assets | 50 | 6
Duke Energy Progress | Not Designated as Hedging Instruments | Commodity Contracts | Current Liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives liabilities | 5 | 2
Duke Energy Progress | Not Designated as Hedging Instruments | Commodity Contracts | Noncurrent Liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives liabilities | 5 | 12
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 assets | 2 | 18
Duke Energy Florida |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives liabilities | 14 |
Duke Energy Florida | Current Liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives liabilities | 14 |
Duke Energy Florida | Commodity Contracts |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives liabilities | 14 |
Duke Energy Florida | Not Designated as Hedging Instruments | Commodity Contracts | Current Liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives liabilities | 14 |
Duke Energy Ohio |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives assets | 2 | 1
Location and fair value amounts of derivatives liabilities | 5 | 6
Duke Energy Ohio | Current Assets |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives assets | 2 | 1
Duke Energy Ohio | Current Liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives liabilities | 1 | 1
Duke Energy Ohio | Noncurrent Liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives liabilities | 4 | 5
Duke Energy Ohio | Commodity Contracts |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives assets | 2 | 1
Duke Energy Ohio | Interest Rate Contracts |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives liabilities | 5 | 6
Duke Energy Ohio | Not Designated as Hedging Instruments | Commodity Contracts | Current Assets |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives assets | 2 | 1
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 liabilities | 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 liabilities | 4 | 5
Duke Energy Indiana |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives assets | 23 | 6
Location and fair value amounts of derivatives liabilities | 27 | 1
Duke Energy Indiana | Current Assets |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives assets | 23 | 6
Duke Energy Indiana | Current Liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives liabilities | 13 | 1
Duke Energy Indiana | Noncurrent Liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives liabilities | 14 |
Duke Energy Indiana | Commodity Contracts |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives assets | 23 | 6
Location and fair value amounts of derivatives liabilities | 13 | 1
Duke Energy Indiana | Interest Rate Contracts |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives liabilities | 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 assets | 23 | 6
Duke Energy Indiana | Not Designated as Hedging Instruments | Commodity Contracts | Current Liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives liabilities | 13 | 1
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 liabilities | 14 |
Piedmont |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives assets | 3 | 1
Location and fair value amounts of derivatives liabilities | 139 | 122
Piedmont | Current Assets |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives assets | 3 | 1
Piedmont | Current Liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives liabilities | 21 | 15
Piedmont | Noncurrent Liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives liabilities | 118 | 107
Piedmont | Commodity Contracts |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives assets | 3 | 1
Location and fair value amounts of derivatives liabilities | 139 | 122
Piedmont | Not Designated as Hedging Instruments | Commodity Contracts | Current Assets |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives assets | 3 | 1
Piedmont | Not Designated as Hedging Instruments | Commodity Contracts | Current Liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives liabilities | 21 | 15
Piedmont | Not Designated as Hedging Instruments | Commodity Contracts | Noncurrent Liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Location and fair value amounts of derivatives liabilities | $ 118 | $ 107

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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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