Loss Contingency, Number Of Deceased Individuals

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Loss Contingency, Number Of Individuals

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Loss Contingency, Number Of Survivors

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Number of State Court Actions Filed

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Number of NC and SC Plants with Ash Basins with insurance claims being sought

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Carrying amount as of the balance sheet date of reserves for the costs of settling insured claims and costs incurred in the claims settlement process attributable to asbestos and environmental claims, before estimated recoveries from reinsurers.

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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.

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Number of pending claims pertaining to a loss contingency.

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Amount of receivable related to a loss contingency accrual that is expected to be collected after one year or beyond the normal operating cycle, if longer. For example, an insurance recovery receivable.

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The carrying value as of the balance sheet date of the estimated valuation allowance to reduce gross premiums receivable to net realizable value.

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Cash received for the settlement of litigation during the current period.

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Amount of risk reinsured in excess of stated retention per company policy.

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Commitments and Contingencies (Narrative) (Details) $ in Millions		9 Months Ended	56 Months Ended
	Jun. 16, 2021 people	Sep. 30, 2021 USD ($) claim case plant	Oct. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Texas Storm Uri Tort Litigation
Loss Contingencies [Line Items]
Number of state court actions filed \| case		30
Coal Ash Insurance Coverage Litigation
Loss Contingencies [Line Items]
Number of NC and SC Plants with Ash Basins \| plant		15
Duke Energy Carolinas and Duke Energy Progress \| Coal Ash Insurance Coverage Litigation \| Subsequent event
Loss Contingencies [Line Items]
Proceeds from legal settlements			$ 418
Duke Energy Carolinas \| Ruben Villano, et al. v. Duke Energy Carolinas, LLC \| Pending Litigation
Loss Contingencies [Line Items]
Number of individuals \| people	9
Number of survivors \| people	4
Number of deceased individuals \| people	5
Duke Energy Carolinas \| Asbestos-related Injuries and Damages Claims
Loss Contingencies [Line Items]
Asbestos-related injuries and damages reserves		$ 508		$ 572
Reinsurance retention policy, excess retention, amount reinsured		697
Probable insurance recoveries		$ 644		704
Duke Energy Carolinas \| Asbestos-related Injuries and Damages Claims \| Non-malignant cases
Loss Contingencies [Line Items]
Loss contingency, pending claims, number \| claim		74
Asbestos-related injuries and damages reserves		$ 15
Duke Energy Carolinas \| Asbestos-related Injuries and Damages Claims \| Malignant cases
Loss Contingencies [Line Items]
Loss contingency, pending claims, number \| claim		58
Asbestos-related injuries and damages reserves		$ 21
Duke Energy and Duke Energy Carolinas \| ASU 2016-13
Loss Contingencies [Line Items]
Reserve for credit losses for insurance receivables		$ 15		$ 15