Variable Interest Entities (Schedule of Accounts Receivable Securitizations) (Details) - USD ($)	Mar. 31, 2022	Dec. 31, 2021
Variable Interest Entities [Line Items]
Long-Term Debt	$ 62,196,000,000	$ 60,448,000,000
Duke Energy Carolinas
Variable Interest Entities [Line Items]
Long-Term Debt	12,803,000,000	12,595,000,000
Duke Energy Progress
Variable Interest Entities [Line Items]
Long-Term Debt	10,396,000,000	9,543,000,000
Duke Energy Florida
Variable Interest Entities [Line Items]
Long-Term Debt	8,374,000,000	8,406,000,000
CRC | VIE primary beneficiary
Variable Interest Entities [Line Items]
Facility size	350,000,000
Long-Term Debt	350,000,000	350,000,000
Accounts receivable from securitization	566,000,000	587,000,000
DERF | Duke Energy Carolinas | VIE primary beneficiary
Variable Interest Entities [Line Items]
Facility size	475,000,000
Long-Term Debt	499,000,000	475,000,000
Accounts receivable from securitization	858,000,000	844,000,000
DEPR | Duke Energy Progress | VIE primary beneficiary
Variable Interest Entities [Line Items]
Facility size	350,000,000
Long-Term Debt	350,000,000	350,000,000
Accounts receivable from securitization	658,000,000	574,000,000
DEFR | Duke Energy Florida | VIE primary beneficiary
Variable Interest Entities [Line Items]
Facility size	250,000,000
Long-Term Debt	250,000,000	250,000,000
Accounts receivable from securitization	$ 503,000,000	$ 427,000,000