Regulatory Matters (Regulatory Matters Narrative - Duke Energy Carolinas and Duke Energy Progress) (Details)	Apr. 05, 2022
NCUC \| Duke Energy Carolinas and Duke Energy Progress \| HB 951 \| Subsequent event
Public Utilities, General Disclosures [Line Items]
Retail portion of remaining net book value of retiring coal plants (as a percent)	50.00%

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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