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Severance (Rollforward) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Restructuring Reserve [Roll Forward]
Balance, beginning of period	$ 102	$ 64
Provision/Adjustments	(28)	80
Cash Reductions	(55)	(42)
Balance, end of period	19	102
Duke Energy Carolinas
Restructuring Reserve [Roll Forward]
Balance, beginning of period	35	15
Provision/Adjustments	(6)	30
Cash Reductions	(21)	(10)
Balance, end of period	8	35
Progress Energy
Restructuring Reserve [Roll Forward]
Balance, beginning of period	16	6
Provision/Adjustments	(3)	13
Cash Reductions	(11)	(3)
Balance, end of period	2	16
Duke Energy Progress
Restructuring Reserve [Roll Forward]
Balance, beginning of period	8	4
Provision/Adjustments	(1)	6
Cash Reductions	(6)	(2)
Balance, end of period	1	8
Duke Energy Florida
Restructuring Reserve [Roll Forward]
Balance, beginning of period	8	2
Provision/Adjustments	(2)	7
Cash Reductions	(5)	(1)
Balance, end of period	1	8
Duke Energy Ohio
Restructuring Reserve [Roll Forward]
Balance, beginning of period	1
Provision/Adjustments	(1)	1
Balance, end of period		1
Duke Energy Indiana
Restructuring Reserve [Roll Forward]
Balance, beginning of period	4
Provision/Adjustments	(3)	4
Cash Reductions	(1)
Balance, end of period		4
Piedmont
Restructuring Reserve [Roll Forward]
Balance, beginning of period	2	1
Provision/Adjustments	(1)	2
Cash Reductions	$ (1)	(1)
Balance, end of period		$ 2

X

- Definition

Amount of cash payments made as the result of exit or disposal activities. Excludes payments associated with a discontinued operation or an asset retirement obligation.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 420
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (b)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482017/420-10-50-1

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 230
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 17
-Subparagraph (f)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482740/230-10-45-17

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- Definition

Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 45
-Paragraph 28
-Subparagraph (b)
-SubTopic 10
-Topic 230
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482740/230-10-45-28

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 420
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 2
-Subparagraph (SAB Topic 5.P.4.b.1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479823/420-10-S99-2

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 420
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482047/420-10-45-3

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 420
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 5.P.3)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479823/420-10-S99-1

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X

- Definition

Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 420
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 2
-Subparagraph (SAB Topic 5.P.4.b.2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479823/420-10-S99-2

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 420
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (b)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482017/420-10-50-1

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- Definition

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+ References

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