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Organization and Basis of Presentation (Schedule of Inventory) (Details) - USD ($) $ in Millions	Jun. 30, 2024	Dec. 31, 2023
Public Utilities, Inventory [Line Items]
Total inventory	$ 4,390	$ 4,292
Duke Energy (Parent)
Public Utilities, Inventory [Line Items]
Materials and supplies	3,254	3,086
Coal	846	842
Natural gas, oil and other fuel	290	364
Total inventory	4,390	4,292
Duke Energy Carolinas
Public Utilities, Inventory [Line Items]
Materials and supplies	1,094	1,075
Coal	372	364
Natural gas, oil and other fuel	43	45
Total inventory	1,509	1,484
Progress Energy
Public Utilities, Inventory [Line Items]
Materials and supplies	1,588	1,465
Coal	233	231
Natural gas, oil and other fuel	198	205
Total inventory	2,019	1,901
Duke Energy Progress
Public Utilities, Inventory [Line Items]
Materials and supplies	1,051	963
Coal	146	154
Natural gas, oil and other fuel	106	110
Total inventory	1,303	1,227
Duke Energy Florida
Public Utilities, Inventory [Line Items]
Materials and supplies	537	502
Coal	87	77
Natural gas, oil and other fuel	92	95
Total inventory	716	674
Duke Energy Ohio
Public Utilities, Inventory [Line Items]
Materials and supplies	150	139
Coal	29	28
Natural gas, oil and other fuel	12	12
Total inventory	191	179
Duke Energy Indiana
Public Utilities, Inventory [Line Items]
Materials and supplies	373	361
Coal	212	219
Natural gas, oil and other fuel	2	2
Total inventory	587	582
Piedmont
Public Utilities, Inventory [Line Items]
Materials and supplies	12	12
Coal	0	0
Natural gas, oil and other fuel	35	100
Total inventory	$ 47	$ 112

X

- Definition

Carrying amount as of the balance sheet date of coal, which is a combustible rock or minerals which are extracted from the ground and used as fuel.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(6)(a))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

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- Definition

Amount of fossil fuel included in inventory classified as other.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(6)(a))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

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- Definition

Gross amount of unprocessed materials to be used in manufacturing or production process and supplies that will be consumed.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(6))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

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- Definition

The period end amount for a type of inventory held by the utility in a schedule of inventories.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(6)(a))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

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- 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/2009/role/commonPracticeRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(6)(a))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

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