Variable Interest Entities (Schedule of Consolidated VIEs) (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Variable Interest Entities [Line Items]
Regulatory Assets: Current	$ 3,489	$ 3,485
Current Assets: Other	602	973
Other Noncurrent Assets: Regulatory assets	13,745	14,645
Public Utilities, Property, Plant and Equipment, Plant in Service	170,941	163,839
Accumulated depreciation and amortization	(54,994)	(52,100)
Other	3,698	3,400
Current Liabilities: Other	2,087	2,167
Current maturities of long-term debt	4,034	3,878
Long-Term Debt	71,353	65,873
Asset Retirement Obligations, Noncurrent	11,613	11,955
Deferred Credits and Other Liabilities	1,325	1,502
Duke Energy Florida
Variable Interest Entities [Line Items]
Regulatory Assets: Current	749	1,143
Current Assets: Other	129	108
Other Noncurrent Assets: Regulatory assets	2,042	2,422
Public Utilities, Property, Plant and Equipment, Plant in Service	27,581	25,940
Accumulated depreciation and amortization	(6,896)	(6,377)
Other	463	372
Current Liabilities: Other	349	363
Current maturities of long-term debt	1,194	328
Long-Term Debt	8,726	9,381
Asset Retirement Obligations, Noncurrent	307	357
Deferred Credits and Other Liabilities	70	84
Duke Energy Carolinas
Variable Interest Entities [Line Items]
Regulatory Assets: Current	1,447	1,095
Current Assets: Other	86	216
Other Noncurrent Assets: Regulatory assets	4,020	4,293
Public Utilities, Property, Plant and Equipment, Plant in Service	56,888	54,650
Accumulated depreciation and amortization	(19,668)	(18,669)
Other	1,087	1,036
Current Liabilities: Other	597	580
Current maturities of long-term debt	19	1,018
Long-Term Debt	15,676	12,948
Asset Retirement Obligations, Noncurrent	5,030	5,121
Deferred Credits and Other Liabilities	565	527
Duke Energy Progress
Variable Interest Entities [Line Items]
Regulatory Assets: Current	946	690
Current Assets: Other	49	174
Other Noncurrent Assets: Regulatory assets	4,406	4,724
Public Utilities, Property, Plant and Equipment, Plant in Service	40,283	38,875
Accumulated depreciation and amortization	(14,869)	(14,201)
Other	693	650
Current Liabilities: Other	452	384
Current maturities of long-term debt	71	369
Long-Term Debt	11,497	10,568
Asset Retirement Obligations, Noncurrent	5,362	5,535
Deferred Credits and Other Liabilities	84	76
DEFPF | Duke Energy Florida | VIE primary beneficiary
Variable Interest Entities [Line Items]
Receivables of VIEs	8	6
Regulatory Assets: Current	58	55
Current Assets: Other	24	41
Other Noncurrent Assets: Regulatory assets	816	826
Current Liabilities: Other	2	9
Current maturities of long-term debt	58	56
Long-Term Debt	832	890
DECNCSF | Duke Energy Carolinas | VIE primary beneficiary
Variable Interest Entities [Line Items]
Regulatory Assets: Current	12	12
Current Assets: Other	5	8
Other Noncurrent Assets: Regulatory assets	199	208
Other	1	1
Current Liabilities: Other	1	3
Current maturities of long-term debt	11	10
Long-Term Debt	208	219
DEPNCSF | Duke Energy Progress | VIE primary beneficiary
Variable Interest Entities [Line Items]
Regulatory Assets: Current	39	39
Current Assets: Other	16	29
Other Noncurrent Assets: Regulatory assets	653	681
Other	2	2
Current Liabilities: Other	4	8
Current maturities of long-term debt	34	34
Long-Term Debt	$ 680	$ 714