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Organization and Basis of Presentation (Schedule of Inventory) (Details) - USD ($) $ in Millions	Mar. 31, 2025	Dec. 31, 2024
Public Utilities, Inventory [Line Items]
Total inventory	$ 4,418	$ 4,509
Duke Energy (Parent)
Public Utilities, Inventory [Line Items]
Materials and supplies	3,413	3,387
Coal	700	801
Natural gas, oil and other fuel	305	321
Total inventory	4,418	4,509
Duke Energy Carolinas
Public Utilities, Inventory [Line Items]
Materials and supplies	1,133	1,150
Coal	309	341
Natural gas, oil and other fuel	46	45
Total inventory	1,488	1,536
Progress Energy
Public Utilities, Inventory [Line Items]
Materials and supplies	1,677	1,649
Coal	233	241
Natural gas, oil and other fuel	197	196
Total inventory	2,107	2,086
Duke Energy Progress
Public Utilities, Inventory [Line Items]
Materials and supplies	1,090	1,074
Coal	137	164
Natural gas, oil and other fuel	106	103
Total inventory	1,333	1,341
Duke Energy Florida
Public Utilities, Inventory [Line Items]
Materials and supplies	586	576
Coal	96	77
Natural gas, oil and other fuel	91	92
Total inventory	773	745
Duke Energy Ohio
Public Utilities, Inventory [Line Items]
Materials and supplies	155	149
Coal	18	23
Natural gas, oil and other fuel	11	11
Total inventory	184	183
Duke Energy Indiana
Public Utilities, Inventory [Line Items]
Materials and supplies	399	389
Coal	140	196
Natural gas, oil and other fuel	2	1
Total inventory	541	586
Piedmont
Public Utilities, Inventory [Line Items]
Materials and supplies	12	11
Coal	0	0
Natural gas, oil and other fuel	49	67
Total inventory	$ 61	$ 78

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
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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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