Variable Interest Entities (Schedule of Consolidated VIEs) (Details) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Variable Interest Entities [Line Items]
Regulatory Assets: Current	$ 3,502	$ 3,485
Current Assets: Other	452	973
Other Noncurrent Assets: Regulatory assets	14,702	14,645
Public Utilities, Property, Plant and Equipment, Plant in Service	166,096	163,839
Accumulated depreciation and amortization	(53,162)	(52,100)
Other	3,426	3,400
Current Liabilities: Other	1,970	2,167
Current maturities of long-term debt	3,330	3,878
Long-Term Debt	69,107	65,873
Asset Retirement Obligations, Noncurrent	11,987	11,955
Deferred Credits and Other Liabilities	1,417	1,502
Duke Energy Florida
Variable Interest Entities [Line Items]
Regulatory Assets: Current	784	1,143
Current Assets: Other	67	108
Other Noncurrent Assets: Regulatory assets	2,605	2,422
Public Utilities, Property, Plant and Equipment, Plant in Service	26,448	25,940
Accumulated depreciation and amortization	(6,552)	(6,377)
Other	393	372
Current Liabilities: Other	320	363
Current maturities of long-term debt	330	328
Long-Term Debt	9,353	9,381
Asset Retirement Obligations, Noncurrent	346	357
Deferred Credits and Other Liabilities	77	84
Duke Energy Carolinas
Variable Interest Entities [Line Items]
Regulatory Assets: Current	1,311	1,095
Current Assets: Other	62	216
Other Noncurrent Assets: Regulatory assets	4,309	4,293
Public Utilities, Property, Plant and Equipment, Plant in Service	55,422	54,650
Accumulated depreciation and amortization	(19,082)	(18,669)
Other	998	1,036
Current Liabilities: Other	572	580
Current maturities of long-term debt	18	1,018
Long-Term Debt	14,787	12,948
Asset Retirement Obligations, Noncurrent	5,148	5,121
Deferred Credits and Other Liabilities	534	527
Duke Energy Progress
Variable Interest Entities [Line Items]
Regulatory Assets: Current	764	690
Current Assets: Other	57	174
Other Noncurrent Assets: Regulatory assets	4,817	4,724
Public Utilities, Property, Plant and Equipment, Plant in Service	39,396	38,875
Accumulated depreciation and amortization	(14,452)	(14,201)
Other	659	650
Current Liabilities: Other	412	384
Current maturities of long-term debt	370	369
Long-Term Debt	11,527	10,568
Asset Retirement Obligations, Noncurrent	5,552	5,535
Deferred Credits and Other Liabilities	89	76
DEFPF | Duke Energy Florida | VIE primary beneficiary
Variable Interest Entities [Line Items]
Receivables of VIEs	4	6
Regulatory Assets: Current	55	55
Current Assets: Other	18	41
Other Noncurrent Assets: Regulatory assets	814	826
Current Liabilities: Other	2	9
Current maturities of long-term debt	57	56
Long-Term Debt	859	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	205	208
Other	1	1
Current Liabilities: Other	1	3
Current maturities of long-term debt	10	10
Long-Term Debt	213	219
DEPNCSF | Duke Energy Progress | VIE primary beneficiary
Variable Interest Entities [Line Items]
Regulatory Assets: Current	39	39
Current Assets: Other	15	29
Other Noncurrent Assets: Regulatory assets	672	681
Other	4	2
Current Liabilities: Other	4	8
Current maturities of long-term debt	34	34
Long-Term Debt	$ 697	$ 714