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Asset Retirement Obligations (Recorded on the Balance Sheet) (Details) - USD ($) $ in Millions	Sep. 30, 2025	Dec. 31, 2024
Asset Retirement Obligation [Line Items]
Total asset retirement obligation	$ 9,644	$ 9,988
Less: Current portion	592	650
Asset retirement obligations	9,052	9,338
Decommissioning of nuclear power facilities
Asset Retirement Obligation [Line Items]
Total asset retirement obligation	4,625
Closure of ash impoundments
Asset Retirement Obligation [Line Items]
Total asset retirement obligation	4,688
Other
Asset Retirement Obligation [Line Items]
Total asset retirement obligation	331
Duke Energy Carolinas
Asset Retirement Obligation [Line Items]
Total asset retirement obligation	3,854	3,990
Less: Current portion	247	247
Asset retirement obligations	3,607	3,743
Duke Energy Carolinas | Decommissioning of nuclear power facilities
Asset Retirement Obligation [Line Items]
Total asset retirement obligation	2,131
Duke Energy Carolinas | Closure of ash impoundments
Asset Retirement Obligation [Line Items]
Total asset retirement obligation	1,648
Duke Energy Carolinas | Other
Asset Retirement Obligation [Line Items]
Total asset retirement obligation	75
Progress Energy
Asset Retirement Obligation [Line Items]
Total asset retirement obligation	4,482	4,548
Less: Current portion	208	231
Asset retirement obligations	4,274	4,317
Progress Energy | Decommissioning of nuclear power facilities
Asset Retirement Obligation [Line Items]
Total asset retirement obligation	2,479
Progress Energy | Closure of ash impoundments
Asset Retirement Obligation [Line Items]
Total asset retirement obligation	1,868
Progress Energy | Other
Asset Retirement Obligation [Line Items]
Total asset retirement obligation	135
Duke Energy Progress
Asset Retirement Obligation [Line Items]
Total asset retirement obligation	4,287	4,334
Less: Current portion	206	230
Asset retirement obligations	4,081	4,104
Duke Energy Progress | Decommissioning of nuclear power facilities
Asset Retirement Obligation [Line Items]
Total asset retirement obligation	2,400
Duke Energy Progress | Closure of ash impoundments
Asset Retirement Obligation [Line Items]
Total asset retirement obligation	1,844
Duke Energy Progress | Other
Asset Retirement Obligation [Line Items]
Total asset retirement obligation	43
Duke Energy Florida
Asset Retirement Obligation [Line Items]
Total asset retirement obligation	195	214
Less: Current portion	2	1
Asset retirement obligations	193	213
Duke Energy Florida | Decommissioning of nuclear power facilities
Asset Retirement Obligation [Line Items]
Total asset retirement obligation	79
Duke Energy Florida | Closure of ash impoundments
Asset Retirement Obligation [Line Items]
Total asset retirement obligation	24
Duke Energy Florida | Other
Asset Retirement Obligation [Line Items]
Total asset retirement obligation	92
Duke Energy Ohio
Asset Retirement Obligation [Line Items]
Total asset retirement obligation	133	139
Less: Current portion	8	8
Asset retirement obligations	125	131
Duke Energy Ohio | Decommissioning of nuclear power facilities
Asset Retirement Obligation [Line Items]
Total asset retirement obligation	0
Duke Energy Ohio | Closure of ash impoundments
Asset Retirement Obligation [Line Items]
Total asset retirement obligation	65
Duke Energy Ohio | Other
Asset Retirement Obligation [Line Items]
Total asset retirement obligation	68
Duke Energy Indiana
Asset Retirement Obligation [Line Items]
Total asset retirement obligation	1,136	1,268
Less: Current portion	130	164
Asset retirement obligations	1,006	1,104
Duke Energy Indiana | Decommissioning of nuclear power facilities
Asset Retirement Obligation [Line Items]
Total asset retirement obligation	0
Duke Energy Indiana | Closure of ash impoundments
Asset Retirement Obligation [Line Items]
Total asset retirement obligation	1,107
Duke Energy Indiana | Other
Asset Retirement Obligation [Line Items]
Total asset retirement obligation	29
Piedmont
Asset Retirement Obligation [Line Items]
Total asset retirement obligation	26	24
Less: Current portion	0
Asset retirement obligations	26	$ 24
Piedmont | Decommissioning of nuclear power facilities
Asset Retirement Obligation [Line Items]
Total asset retirement obligation	0
Piedmont | Closure of ash impoundments
Asset Retirement Obligation [Line Items]
Total asset retirement obligation	0
Piedmont | Other
Asset Retirement Obligation [Line Items]
Total asset retirement obligation	$ 26

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- Definition

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+ References

No definition available.

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- Definition

The carrying amount of a liability for an asset retirement obligation. An asset retirement obligation is a legal obligation associated with the disposal or retirement of a tangible long-lived asset that results from the acquisition, construction or development, or the normal operations of a long-lived asset, except for certain obligations of lessees.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 410
-SubTopic 20
-Name Accounting Standards Codification
-Section 25
-Paragraph 4
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481999/410-20-25-4

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 410
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481850/410-20-50-1

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- Definition

Current portion of the carrying amount of a liability for an asset retirement obligation. An asset retirement obligation is a legal obligation associated with the disposal or retirement of a tangible long-lived asset that results from the acquisition, construction or development, or the normal operations of a long-lived asset, except for certain obligations of lessees.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 410
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481850/410-20-50-1

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Noncurrent portion of the carrying amount of a liability for an asset retirement obligation. An asset retirement obligation is a legal obligation associated with the disposal or retirement of a tangible long-lived asset that results from the acquisition, construction or development, or the normal operations of a long-lived asset, except for certain obligations of lessees.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 410
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481850/410-20-50-1

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