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Asset Retirement Obligations (ARO Rollforward) (Details) $ in Millions | 9 Months Ended
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Sep. 30, 2023 USD ($)
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward] |
Balance at beginning of period | $ 12,728
Accretion expense | 391
Liabilities settled | (494)
Revision in estimates of cash flows | (392)
Balance at end of period | 12,233
Duke Energy Carolinas |
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward] |
Balance at beginning of period | 5,382
Accretion expense | 189
Liabilities settled | (171)
Revision in estimates of cash flows | (132)
Balance at end of period | 5,268
Progress Energy |
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward] |
Balance at beginning of period | 6,181
Accretion expense | 178
Liabilities settled | (247)
Revision in estimates of cash flows | (182)
Balance at end of period | 5,930
Duke Energy Progress |
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward] |
Balance at beginning of period | 5,823
Accretion expense | 169
Liabilities settled | (196)
Revision in estimates of cash flows | (174)
Balance at end of period | 5,622
Duke Energy Florida |
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward] |
Balance at beginning of period | 358
Accretion expense | 9
Liabilities settled | (51)
Revision in estimates of cash flows | (8)
Balance at end of period | 308
Duke Energy Ohio |
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward] |
Balance at beginning of period | 154
Accretion expense | 5
Liabilities settled | (11)
Revision in estimates of cash flows | (10)
Balance at end of period | 138
Duke Energy Indiana |
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward] |
Balance at beginning of period | 951
Accretion expense | 24
Liabilities settled | (66)
Revision in estimates of cash flows | (67)
Balance at end of period | 842
Piedmont |
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward] |
Balance at beginning of period | 26
Accretion expense | 2
Balance at end of period | $ 28

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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 + Details
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- Definition Amount of accretion expense recognized during the period that is associated with an asset retirement obligation. Accretion expense measures and incorporates changes due to the passage of time into the carrying amount of the liability. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 410 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481879/410-20-45-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 410 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (c)(3) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481850/410-20-50-1 + Details
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- Definition Amount of asset retirement obligations settled, or otherwise disposed of, during the period. This may include asset retirement obligations transferred to third parties associated with the sale of a long-lived asset. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 410 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (c)(2) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481850/410-20-50-1 + Details
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- Definition Amount of increase (decrease) in the asset retirement obligation from changes in the amount or timing of the estimated cash flows associated with the settlement of the obligation. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 410 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (c)(4) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481850/410-20-50-1 + Details
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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
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