XML 150 R108.htm IDEA: XBRL DOCUMENT v3.25.3

Derivatives and Hedging (Location and Fair Value Amounts of Derivatives Reflected in the Condensed Consolidated Balance Sheets) (Details) - USD ($) $ in Millions	Sep. 30, 2025	Dec. 31, 2024
Derivatives, Fair Value [Line Items]
Derivative assets	$ 360	$ 434
Derivative liabilities	248	319
Current assets
Derivatives, Fair Value [Line Items]
Derivative assets	62	267
Noncurrent assets
Derivatives, Fair Value [Line Items]
Derivative assets	298	167
Current liabilities
Derivatives, Fair Value [Line Items]
Derivative liabilities	117	145
Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Derivative liabilities	131	174
Commodity Contracts
Derivatives, Fair Value [Line Items]
Derivative assets	106	109
Derivative liabilities	179	242
Interest Rate Contracts
Derivatives, Fair Value [Line Items]
Derivative assets	83	320
Derivative liabilities	43	3
Foreign Currency Contracts
Derivatives, Fair Value [Line Items]
Derivative assets	171	5
Derivative liabilities	26	74
Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent assets
Derivatives, Fair Value [Line Items]
Derivative assets	24
Designated as Hedging Instruments | Interest Rate Contracts | Current liabilities
Derivatives, Fair Value [Line Items]
Derivative assets		108
Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Derivative assets		52
Derivative liabilities	3
Designated as Hedging Instruments | Foreign Currency Contracts | Noncurrent assets
Derivatives, Fair Value [Line Items]
Derivative assets	171
Designated as Hedging Instruments | Foreign Currency Contracts | Current liabilities
Derivatives, Fair Value [Line Items]
Derivative liabilities	26	35
Designated as Hedging Instruments | Foreign Currency Contracts | Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Derivative assets		5
Derivative liabilities		39
Not Designated as Hedging Instruments | Commodity Contracts | Current assets
Derivatives, Fair Value [Line Items]
Derivative assets	59	49
Not Designated as Hedging Instruments | Commodity Contracts | Noncurrent assets
Derivatives, Fair Value [Line Items]
Derivative assets	47	60
Not Designated as Hedging Instruments | Commodity Contracts | Current liabilities
Derivatives, Fair Value [Line Items]
Derivative liabilities	79	108
Not Designated as Hedging Instruments | Commodity Contracts | Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Derivative liabilities	100	134
Not Designated as Hedging Instruments | Interest Rate Contracts | Current assets
Derivatives, Fair Value [Line Items]
Derivative assets	3	110
Not Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent assets
Derivatives, Fair Value [Line Items]
Derivative assets	56	50
Not Designated as Hedging Instruments | Interest Rate Contracts | Current liabilities
Derivatives, Fair Value [Line Items]
Derivative liabilities	12	2
Not Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Derivative liabilities	28	1
Duke Energy Carolinas
Derivatives, Fair Value [Line Items]
Derivative assets	77	94
Derivative liabilities	79	88
Duke Energy Carolinas | Current assets
Derivatives, Fair Value [Line Items]
Derivative assets	22	39
Duke Energy Carolinas | Noncurrent assets
Derivatives, Fair Value [Line Items]
Derivative assets	55	55
Duke Energy Carolinas | Current liabilities
Derivatives, Fair Value [Line Items]
Derivative liabilities	43	57
Duke Energy Carolinas | Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Derivative liabilities	36	31
Duke Energy Carolinas | Commodity Contracts
Derivatives, Fair Value [Line Items]
Derivative assets	44	49
Derivative liabilities	67	88
Duke Energy Carolinas | Interest Rate Contracts
Derivatives, Fair Value [Line Items]
Derivative assets	33	45
Derivative liabilities	12	0
Duke Energy Carolinas | Foreign Currency Contracts
Derivatives, Fair Value [Line Items]
Derivative assets	0	0
Derivative liabilities	0	0
Duke Energy Carolinas | Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent assets
Derivatives, Fair Value [Line Items]
Derivative assets	0
Duke Energy Carolinas | Designated as Hedging Instruments | Interest Rate Contracts | Current liabilities
Derivatives, Fair Value [Line Items]
Derivative assets		0
Duke Energy Carolinas | Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Derivative assets		0
Derivative liabilities	0
Duke Energy Carolinas | Designated as Hedging Instruments | Foreign Currency Contracts | Noncurrent assets
Derivatives, Fair Value [Line Items]
Derivative assets	0
Duke Energy Carolinas | Designated as Hedging Instruments | Foreign Currency Contracts | Current liabilities
Derivatives, Fair Value [Line Items]
Derivative liabilities	0	0
Duke Energy Carolinas | Designated as Hedging Instruments | Foreign Currency Contracts | Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Derivative assets		0
Derivative liabilities		0
Duke Energy Carolinas | Not Designated as Hedging Instruments | Commodity Contracts | Current assets
Derivatives, Fair Value [Line Items]
Derivative assets	22	20
Duke Energy Carolinas | Not Designated as Hedging Instruments | Commodity Contracts | Noncurrent assets
Derivatives, Fair Value [Line Items]
Derivative assets	22	29
Duke Energy Carolinas | Not Designated as Hedging Instruments | Commodity Contracts | Current liabilities
Derivatives, Fair Value [Line Items]
Derivative liabilities	43	57
Duke Energy Carolinas | Not Designated as Hedging Instruments | Commodity Contracts | Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Derivative liabilities	24	31
Duke Energy Carolinas | Not Designated as Hedging Instruments | Interest Rate Contracts | Current assets
Derivatives, Fair Value [Line Items]
Derivative assets	0	19
Duke Energy Carolinas | Not Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent assets
Derivatives, Fair Value [Line Items]
Derivative assets	33	26
Duke Energy Carolinas | Not Designated as Hedging Instruments | Interest Rate Contracts | Current liabilities
Derivatives, Fair Value [Line Items]
Derivative liabilities	0	0
Duke Energy Carolinas | Not Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Derivative liabilities	12	0
Progress Energy
Derivatives, Fair Value [Line Items]
Derivative assets	72	127
Derivative liabilities	54	58
Progress Energy | Current assets
Derivatives, Fair Value [Line Items]
Derivative assets	24	72
Progress Energy | Noncurrent assets
Derivatives, Fair Value [Line Items]
Derivative assets	48	55
Progress Energy | Current liabilities
Derivatives, Fair Value [Line Items]
Derivative liabilities	29	34
Progress Energy | Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Derivative liabilities	25	24
Progress Energy | Commodity Contracts
Derivatives, Fair Value [Line Items]
Derivative assets	46	49
Derivative liabilities	32	56
Progress Energy | Interest Rate Contracts
Derivatives, Fair Value [Line Items]
Derivative assets	26	78
Derivative liabilities	22	2
Progress Energy | Foreign Currency Contracts
Derivatives, Fair Value [Line Items]
Derivative assets	0	0
Derivative liabilities	0	0
Progress Energy | Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent assets
Derivatives, Fair Value [Line Items]
Derivative assets	0
Progress Energy | Designated as Hedging Instruments | Interest Rate Contracts | Current liabilities
Derivatives, Fair Value [Line Items]
Derivative assets		0
Progress Energy | Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Derivative assets		0
Derivative liabilities	0
Progress Energy | Designated as Hedging Instruments | Foreign Currency Contracts | Noncurrent assets
Derivatives, Fair Value [Line Items]
Derivative assets	0
Progress Energy | Designated as Hedging Instruments | Foreign Currency Contracts | Current liabilities
Derivatives, Fair Value [Line Items]
Derivative liabilities	0	0
Progress Energy | Designated as Hedging Instruments | Foreign Currency Contracts | Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Derivative assets		0
Derivative liabilities		0
Progress Energy | Not Designated as Hedging Instruments | Commodity Contracts | Current assets
Derivatives, Fair Value [Line Items]
Derivative assets	21	17
Progress Energy | Not Designated as Hedging Instruments | Commodity Contracts | Noncurrent assets
Derivatives, Fair Value [Line Items]
Derivative assets	25	32
Progress Energy | Not Designated as Hedging Instruments | Commodity Contracts | Current liabilities
Derivatives, Fair Value [Line Items]
Derivative liabilities	17	32
Progress Energy | Not Designated as Hedging Instruments | Commodity Contracts | Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Derivative liabilities	15	24
Progress Energy | Not Designated as Hedging Instruments | Interest Rate Contracts | Current assets
Derivatives, Fair Value [Line Items]
Derivative assets	3	55
Progress Energy | Not Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent assets
Derivatives, Fair Value [Line Items]
Derivative assets	23	23
Progress Energy | Not Designated as Hedging Instruments | Interest Rate Contracts | Current liabilities
Derivatives, Fair Value [Line Items]
Derivative liabilities	12	2
Progress Energy | Not Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Derivative liabilities	10	0
Duke Energy Progress
Derivatives, Fair Value [Line Items]
Derivative assets	62	109
Derivative liabilities	36	57
Duke Energy Progress | Current assets
Derivatives, Fair Value [Line Items]
Derivative assets	21	61
Duke Energy Progress | Noncurrent assets
Derivatives, Fair Value [Line Items]
Derivative assets	41	48
Duke Energy Progress | Current liabilities
Derivatives, Fair Value [Line Items]
Derivative liabilities	17	33
Duke Energy Progress | Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Derivative liabilities	19	24
Duke Energy Progress | Commodity Contracts
Derivatives, Fair Value [Line Items]
Derivative assets	47	49
Derivative liabilities	32	56
Duke Energy Progress | Interest Rate Contracts
Derivatives, Fair Value [Line Items]
Derivative assets	15	60
Derivative liabilities	4	1
Duke Energy Progress | Foreign Currency Contracts
Derivatives, Fair Value [Line Items]
Derivative assets	0	0
Derivative liabilities	0	0
Duke Energy Progress | Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent assets
Derivatives, Fair Value [Line Items]
Derivative assets	0
Duke Energy Progress | Designated as Hedging Instruments | Interest Rate Contracts | Current liabilities
Derivatives, Fair Value [Line Items]
Derivative assets		0
Duke Energy Progress | Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Derivative assets		0
Derivative liabilities	0
Duke Energy Progress | Designated as Hedging Instruments | Foreign Currency Contracts | Noncurrent assets
Derivatives, Fair Value [Line Items]
Derivative assets	0
Duke Energy Progress | Designated as Hedging Instruments | Foreign Currency Contracts | Current liabilities
Derivatives, Fair Value [Line Items]
Derivative liabilities	0	0
Duke Energy Progress | Designated as Hedging Instruments | Foreign Currency Contracts | Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Derivative assets		0
Derivative liabilities		0
Duke Energy Progress | Not Designated as Hedging Instruments | Commodity Contracts | Current assets
Derivatives, Fair Value [Line Items]
Derivative assets	21	17
Duke Energy Progress | Not Designated as Hedging Instruments | Commodity Contracts | Noncurrent assets
Derivatives, Fair Value [Line Items]
Derivative assets	26	32
Duke Energy Progress | Not Designated as Hedging Instruments | Commodity Contracts | Current liabilities
Derivatives, Fair Value [Line Items]
Derivative liabilities	17	32
Duke Energy Progress | Not Designated as Hedging Instruments | Commodity Contracts | Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Derivative liabilities	15	24
Duke Energy Progress | Not Designated as Hedging Instruments | Interest Rate Contracts | Current assets
Derivatives, Fair Value [Line Items]
Derivative assets	0	44
Duke Energy Progress | Not Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent assets
Derivatives, Fair Value [Line Items]
Derivative assets	15	16
Duke Energy Progress | Not Designated as Hedging Instruments | Interest Rate Contracts | Current liabilities
Derivatives, Fair Value [Line Items]
Derivative liabilities	0	1
Duke Energy Progress | Not Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Derivative liabilities	4	0
Duke Energy Florida
Derivatives, Fair Value [Line Items]
Derivative assets	10	18
Derivative liabilities	18	1
Duke Energy Florida | Current assets
Derivatives, Fair Value [Line Items]
Derivative assets	2	11
Duke Energy Florida | Noncurrent assets
Derivatives, Fair Value [Line Items]
Derivative assets	8	7
Duke Energy Florida | Current liabilities
Derivatives, Fair Value [Line Items]
Derivative liabilities	12	1
Duke Energy Florida | Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Derivative liabilities	6	0
Duke Energy Florida | Commodity Contracts
Derivatives, Fair Value [Line Items]
Derivative assets	0	0
Derivative liabilities	0	0
Duke Energy Florida | Interest Rate Contracts
Derivatives, Fair Value [Line Items]
Derivative assets	10	18
Derivative liabilities	18	1
Duke Energy Florida | Foreign Currency Contracts
Derivatives, Fair Value [Line Items]
Derivative assets	0	0
Derivative liabilities	0	0
Duke Energy Florida | Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent assets
Derivatives, Fair Value [Line Items]
Derivative assets	0
Duke Energy Florida | Designated as Hedging Instruments | Interest Rate Contracts | Current liabilities
Derivatives, Fair Value [Line Items]
Derivative assets		0
Duke Energy Florida | Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Derivative assets		0
Derivative liabilities	0
Duke Energy Florida | Designated as Hedging Instruments | Foreign Currency Contracts | Noncurrent assets
Derivatives, Fair Value [Line Items]
Derivative assets	0
Duke Energy Florida | Designated as Hedging Instruments | Foreign Currency Contracts | Current liabilities
Derivatives, Fair Value [Line Items]
Derivative liabilities	0	0
Duke Energy Florida | Designated as Hedging Instruments | Foreign Currency Contracts | Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Derivative assets		0
Derivative liabilities		0
Duke Energy Florida | Not Designated as Hedging Instruments | Commodity Contracts | Current assets
Derivatives, Fair Value [Line Items]
Derivative assets	0	0
Duke Energy Florida | Not Designated as Hedging Instruments | Commodity Contracts | Noncurrent assets
Derivatives, Fair Value [Line Items]
Derivative assets	0	0
Duke Energy Florida | Not Designated as Hedging Instruments | Commodity Contracts | Current liabilities
Derivatives, Fair Value [Line Items]
Derivative liabilities	0	0
Duke Energy Florida | Not Designated as Hedging Instruments | Commodity Contracts | Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Derivative liabilities	0	0
Duke Energy Florida | Not Designated as Hedging Instruments | Interest Rate Contracts | Current assets
Derivatives, Fair Value [Line Items]
Derivative assets	2	11
Duke Energy Florida | Not Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent assets
Derivatives, Fair Value [Line Items]
Derivative assets	8	7
Duke Energy Florida | Not Designated as Hedging Instruments | Interest Rate Contracts | Current liabilities
Derivatives, Fair Value [Line Items]
Derivative liabilities	12	1
Duke Energy Florida | Not Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Derivative liabilities	6	0
Duke Energy Ohio
Derivatives, Fair Value [Line Items]
Derivative assets	1	1
Derivative liabilities	0	1
Duke Energy Ohio | Current assets
Derivatives, Fair Value [Line Items]
Derivative assets	1	1
Duke Energy Ohio | Noncurrent assets
Derivatives, Fair Value [Line Items]
Derivative assets	0	0
Duke Energy Ohio | Current liabilities
Derivatives, Fair Value [Line Items]
Derivative liabilities	0	0
Duke Energy Ohio | Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Derivative liabilities	0	1
Duke Energy Ohio | Commodity Contracts
Derivatives, Fair Value [Line Items]
Derivative assets	1	1
Derivative liabilities	0	0
Duke Energy Ohio | Interest Rate Contracts
Derivatives, Fair Value [Line Items]
Derivative assets	0	0
Derivative liabilities	0	1
Duke Energy Ohio | Foreign Currency Contracts
Derivatives, Fair Value [Line Items]
Derivative assets	0	0
Derivative liabilities	0	0
Duke Energy Ohio | Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent assets
Derivatives, Fair Value [Line Items]
Derivative assets	0
Duke Energy Ohio | Designated as Hedging Instruments | Interest Rate Contracts | Current liabilities
Derivatives, Fair Value [Line Items]
Derivative assets		0
Duke Energy Ohio | Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Derivative assets		0
Derivative liabilities	0
Duke Energy Ohio | Designated as Hedging Instruments | Foreign Currency Contracts | Noncurrent assets
Derivatives, Fair Value [Line Items]
Derivative assets	0
Duke Energy Ohio | Designated as Hedging Instruments | Foreign Currency Contracts | Current liabilities
Derivatives, Fair Value [Line Items]
Derivative liabilities	0	0
Duke Energy Ohio | Designated as Hedging Instruments | Foreign Currency Contracts | Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Derivative assets		0
Derivative liabilities		0
Duke Energy Ohio | Not Designated as Hedging Instruments | Commodity Contracts | Current assets
Derivatives, Fair Value [Line Items]
Derivative assets	1	1
Duke Energy Ohio | Not Designated as Hedging Instruments | Commodity Contracts | Noncurrent assets
Derivatives, Fair Value [Line Items]
Derivative assets	0	0
Duke Energy Ohio | Not Designated as Hedging Instruments | Commodity Contracts | Current liabilities
Derivatives, Fair Value [Line Items]
Derivative liabilities	0	0
Duke Energy Ohio | Not Designated as Hedging Instruments | Commodity Contracts | Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Derivative liabilities	0	0
Duke Energy Ohio | Not Designated as Hedging Instruments | Interest Rate Contracts | Current assets
Derivatives, Fair Value [Line Items]
Derivative assets	0	0
Duke Energy Ohio | Not Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent assets
Derivatives, Fair Value [Line Items]
Derivative assets	0	0
Duke Energy Ohio | Not Designated as Hedging Instruments | Interest Rate Contracts | Current liabilities
Derivatives, Fair Value [Line Items]
Derivative liabilities	0	0
Duke Energy Ohio | Not Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Derivative liabilities	0	1
Duke Energy Indiana
Derivatives, Fair Value [Line Items]
Derivative assets	14	44
Derivative liabilities	7	3
Duke Energy Indiana | Current assets
Derivatives, Fair Value [Line Items]
Derivative assets	14	44
Duke Energy Indiana | Noncurrent assets
Derivatives, Fair Value [Line Items]
Derivative assets	0	0
Duke Energy Indiana | Current liabilities
Derivatives, Fair Value [Line Items]
Derivative liabilities	2	3
Duke Energy Indiana | Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Derivative liabilities	5	0
Duke Energy Indiana | Commodity Contracts
Derivatives, Fair Value [Line Items]
Derivative assets	14	8
Derivative liabilities	2	3
Duke Energy Indiana | Interest Rate Contracts
Derivatives, Fair Value [Line Items]
Derivative assets	0	36
Derivative liabilities	5	0
Duke Energy Indiana | Foreign Currency Contracts
Derivatives, Fair Value [Line Items]
Derivative assets	0	0
Derivative liabilities	0	0
Duke Energy Indiana | Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent assets
Derivatives, Fair Value [Line Items]
Derivative assets	0
Duke Energy Indiana | Designated as Hedging Instruments | Interest Rate Contracts | Current liabilities
Derivatives, Fair Value [Line Items]
Derivative assets		0
Duke Energy Indiana | Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Derivative assets		0
Derivative liabilities	0
Duke Energy Indiana | Designated as Hedging Instruments | Foreign Currency Contracts | Noncurrent assets
Derivatives, Fair Value [Line Items]
Derivative assets	0
Duke Energy Indiana | Designated as Hedging Instruments | Foreign Currency Contracts | Current liabilities
Derivatives, Fair Value [Line Items]
Derivative liabilities	0	0
Duke Energy Indiana | Designated as Hedging Instruments | Foreign Currency Contracts | Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Derivative assets		0
Derivative liabilities		0
Duke Energy Indiana | Not Designated as Hedging Instruments | Commodity Contracts | Current assets
Derivatives, Fair Value [Line Items]
Derivative assets	14	8
Duke Energy Indiana | Not Designated as Hedging Instruments | Commodity Contracts | Noncurrent assets
Derivatives, Fair Value [Line Items]
Derivative assets	0	0
Duke Energy Indiana | Not Designated as Hedging Instruments | Commodity Contracts | Current liabilities
Derivatives, Fair Value [Line Items]
Derivative liabilities	2	3
Duke Energy Indiana | Not Designated as Hedging Instruments | Commodity Contracts | Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Derivative liabilities	0	0
Duke Energy Indiana | Not Designated as Hedging Instruments | Interest Rate Contracts | Current assets
Derivatives, Fair Value [Line Items]
Derivative assets	0	36
Duke Energy Indiana | Not Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent assets
Derivatives, Fair Value [Line Items]
Derivative assets	0	0
Duke Energy Indiana | Not Designated as Hedging Instruments | Interest Rate Contracts | Current liabilities
Derivatives, Fair Value [Line Items]
Derivative liabilities	0	0
Duke Energy Indiana | Not Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Derivative liabilities	5	0
Piedmont
Derivatives, Fair Value [Line Items]
Derivative assets	1	1
Derivative liabilities	78	94
Piedmont | Current assets
Derivatives, Fair Value [Line Items]
Derivative assets	1	1
Piedmont | Noncurrent assets
Derivatives, Fair Value [Line Items]
Derivative assets	0	0
Piedmont | Current liabilities
Derivatives, Fair Value [Line Items]
Derivative liabilities	17	16
Piedmont | Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Derivative liabilities	61	78
Piedmont | Commodity Contracts
Derivatives, Fair Value [Line Items]
Derivative assets	1	1
Derivative liabilities	78	94
Piedmont | Interest Rate Contracts
Derivatives, Fair Value [Line Items]
Derivative assets	0	0
Derivative liabilities	0	0
Piedmont | Foreign Currency Contracts
Derivatives, Fair Value [Line Items]
Derivative assets	0	0
Derivative liabilities	0	0
Piedmont | Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent assets
Derivatives, Fair Value [Line Items]
Derivative assets	0
Piedmont | Designated as Hedging Instruments | Interest Rate Contracts | Current liabilities
Derivatives, Fair Value [Line Items]
Derivative assets		0
Piedmont | Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Derivative assets		0
Derivative liabilities	0
Piedmont | Designated as Hedging Instruments | Foreign Currency Contracts | Noncurrent assets
Derivatives, Fair Value [Line Items]
Derivative assets	0
Piedmont | Designated as Hedging Instruments | Foreign Currency Contracts | Current liabilities
Derivatives, Fair Value [Line Items]
Derivative liabilities	0	0
Piedmont | Designated as Hedging Instruments | Foreign Currency Contracts | Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Derivative assets		0
Derivative liabilities		0
Piedmont | Not Designated as Hedging Instruments | Commodity Contracts | Current assets
Derivatives, Fair Value [Line Items]
Derivative assets	1	1
Piedmont | Not Designated as Hedging Instruments | Commodity Contracts | Noncurrent assets
Derivatives, Fair Value [Line Items]
Derivative assets	0	0
Piedmont | Not Designated as Hedging Instruments | Commodity Contracts | Current liabilities
Derivatives, Fair Value [Line Items]
Derivative liabilities	17	16
Piedmont | Not Designated as Hedging Instruments | Commodity Contracts | Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Derivative liabilities	61	78
Piedmont | Not Designated as Hedging Instruments | Interest Rate Contracts | Current assets
Derivatives, Fair Value [Line Items]
Derivative assets	0	0
Piedmont | Not Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent assets
Derivatives, Fair Value [Line Items]
Derivative assets	0	0
Piedmont | Not Designated as Hedging Instruments | Interest Rate Contracts | Current liabilities
Derivatives, Fair Value [Line Items]
Derivative liabilities	0	0
Piedmont | Not Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Derivative liabilities	$ 0	$ 0

X

- 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
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 7A
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480434/815-10-50-7A

Reference 2: 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 3: http://www.xbrl.org/2003/role/exampleRef
-Topic 210
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 21
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483444/210-20-55-21

Reference 4: http://www.xbrl.org/2003/role/exampleRef
-Topic 210
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 20
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483444/210-20-55-20

Reference 5: http://www.xbrl.org/2003/role/exampleRef
-Topic 210
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 15
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483444/210-20-55-15

Reference 6: 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 7: 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

Name:	us-gaap_DerivativeFairValueOfDerivativeAsset
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Fair value, before effects of master netting arrangements, of a financial liability or 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 liabilities elected not to be offset. Excludes liabilities not subject to a master netting arrangement.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 7A
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480434/815-10-50-7A

Reference 2: 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 3: http://www.xbrl.org/2003/role/exampleRef
-Topic 210
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 21
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483444/210-20-55-21

Reference 4: http://www.xbrl.org/2003/role/exampleRef
-Topic 210
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 20
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483444/210-20-55-20

Reference 5: http://www.xbrl.org/2003/role/exampleRef
-Topic 210
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 15
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483444/210-20-55-15

Reference 6: 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 7: 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

Name:	us-gaap_DerivativeFairValueOfDerivativeLiability
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

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

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 182
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480401/815-10-55-182

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 4B
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480434/815-10-50-4B

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 4B
-Subparagraph (c)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480434/815-10-50-4B

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 4B
-Subparagraph (c)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480434/815-10-50-4B

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 4B
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480434/815-10-50-4B

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 4A
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480434/815-10-50-4A

+ Details

Name:	us-gaap_DerivativesFairValueLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_BalanceSheetLocationAxis=us-gaap_OtherCurrentAssetsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_BalanceSheetLocationAxis=us-gaap_OtherNoncurrentAssetsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_BalanceSheetLocationAxis=us-gaap_OtherCurrentLiabilitiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_BalanceSheetLocationAxis=us-gaap_OtherNoncurrentLiabilitiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=us-gaap_CommodityContractMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=us-gaap_InterestRateContractMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=us-gaap_ForeignExchangeContractMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_HedgingDesignationAxis=us-gaap_DesignatedAsHedgingInstrumentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_HedgingDesignationAxis=us-gaap_NondesignatedMember
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_ProgressEnergyMember
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: