Variable Interest Entities (Schedule of Consolidated VIEs) (Details) - USD ($) $ in Millions	Jun. 30, 2023	Dec. 31, 2022
Variable Interest Entities [Line Items]
Regulatory Assets: Current	$ 3,760	$ 3,485
Current Assets: Other	633	973
Other Noncurrent Assets: Regulatory assets	14,147	14,645
Public Utilities, Property, Plant and Equipment, Plant in Service	168,506	163,839
Accumulated depreciation and amortization	(54,030)	(52,100)
Other	3,444	3,400
Current Liabilities: Other	2,094	2,167
Current maturities of long-term debt	4,609	3,878
Long-Term Debt	69,914	65,873
Asset Retirement Obligations, Noncurrent	11,991	11,955
Deferred Credits and Other Liabilities	1,353	1,502
Duke Energy Florida
Variable Interest Entities [Line Items]
Regulatory Assets: Current	1,039	1,143
Current Assets: Other	100	108
Other Noncurrent Assets: Regulatory assets	2,161	2,422
Public Utilities, Property, Plant and Equipment, Plant in Service	27,094	25,940
Accumulated depreciation and amortization	(6,794)	(6,377)
Other	409	372
Current Liabilities: Other	335	363
Current maturities of long-term debt	1,201	328
Long-Term Debt	8,554	9,381
Asset Retirement Obligations, Noncurrent	335	357
Deferred Credits and Other Liabilities	77	84
Duke Energy Carolinas
Variable Interest Entities [Line Items]
Regulatory Assets: Current	1,483	1,095
Current Assets: Other	61	216
Other Noncurrent Assets: Regulatory assets	4,056	4,293
Public Utilities, Property, Plant and Equipment, Plant in Service	56,116	54,650
Accumulated depreciation and amortization	(19,328)	(18,669)
Other	1,005	1,036
Current Liabilities: Other	598	580
Current maturities of long-term debt	18	1,018
Long-Term Debt	15,648	12,948
Asset Retirement Obligations, Noncurrent	5,166	5,121
Deferred Credits and Other Liabilities	561	527
Duke Energy Progress
Variable Interest Entities [Line Items]
Regulatory Assets: Current	888	690
Current Assets: Other	61	174
Other Noncurrent Assets: Regulatory assets	4,658	4,724
Public Utilities, Property, Plant and Equipment, Plant in Service	39,779	38,875
Accumulated depreciation and amortization	(14,598)	(14,201)
Other	651	650
Current Liabilities: Other	440	384
Current maturities of long-term debt	370	369
Long-Term Debt	11,521	10,568
Asset Retirement Obligations, Noncurrent	5,555	5,535
Deferred Credits and Other Liabilities	89	76
DEFPF | Duke Energy Florida | VIE primary beneficiary
Variable Interest Entities [Line Items]
Receivables of VIEs	5	6
Regulatory Assets: Current	56	55
Current Assets: Other	36	41
Other Noncurrent Assets: Regulatory assets	803	826
Current Liabilities: Other	9	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	8	8
Other Noncurrent Assets: Regulatory assets	202	208
Other	1	1
Current Liabilities: Other	3	3
Current maturities of long-term debt	10	10
Long-Term Debt	214	219
DEPNCSF | Duke Energy Progress | VIE primary beneficiary
Variable Interest Entities [Line Items]
Regulatory Assets: Current	39	39
Current Assets: Other	25	29
Other Noncurrent Assets: Regulatory assets	662	681
Other	4	2
Current Liabilities: Other	8	8
Current maturities of long-term debt	34	34
Long-Term Debt	$ 697	$ 714