Variable Interest Entities (Schedule of Consolidated VIEs) (Details) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021
Variable Interest Entities [Line Items]
Regulatory Assets: Current	$ 3,576	$ 2,150
Current Assets: Other	1,244	638
Other Noncurrent Assets: Regulatory assets	13,835	12,487
Property, Plant and Equipment: Cost	169,053	161,819
Accumulated depreciation and amortization	(53,241)	(50,555)
Other Noncurrent Assets: Other	4,050	3,812
Current Liabilities: Other	2,204	2,471
Current maturities of long-term debt	3,249	3,387
Long-Term Debt	66,060	60,448
Other Noncurrent Liabilities: AROs	12,152	12,129
Other Noncurrent Liabilities: Other	1,936	1,650
Duke Energy Florida
Variable Interest Entities [Line Items]
Regulatory Assets: Current	1,212	497
Current Assets: Other	162	80
Other Noncurrent Assets: Regulatory assets	2,038	1,791
Property, Plant and Equipment: Cost	25,243	23,865
Accumulated depreciation and amortization	(6,244)	(5,819)
Other Noncurrent Assets: Other	431	399
Current Liabilities: Other	338	408
Current maturities of long-term debt	328	76
Long-Term Debt	8,089	8,406
Other Noncurrent Liabilities: AROs	363	436
Other Noncurrent Liabilities: Other	355	309
Duke Energy Carolinas
Variable Interest Entities [Line Items]
Regulatory Assets: Current	995	544
Current Assets: Other	267	95
Other Noncurrent Assets: Regulatory assets	3,969	2,935
Property, Plant and Equipment: Cost	53,878	51,874
Accumulated depreciation and amortization	(18,504)	(17,854)
Other Noncurrent Assets: Other	1,179	1,248
Current Liabilities: Other	565	546
Current maturities of long-term debt	1,019	362
Long-Term Debt	12,903	12,595
Other Noncurrent Liabilities: AROs	5,115	5,052
Other Noncurrent Liabilities: Other	537	536
Duke Energy Progress
Variable Interest Entities [Line Items]
Regulatory Assets: Current	658	533
Current Assets: Other	189	83
Other Noncurrent Assets: Regulatory assets	4,482	4,118
Property, Plant and Equipment: Cost	38,503	37,018
Accumulated depreciation and amortization	(14,224)	(13,387)
Other Noncurrent Assets: Other	749	792
Current Liabilities: Other	356	448
Current maturities of long-term debt	368	556
Long-Term Debt	10,572	9,543
Other Noncurrent Liabilities: AROs	5,529	5,401
Other Noncurrent Liabilities: Other	86	87
DEFPF | Duke Energy Florida | VIE primary beneficiary
Variable Interest Entities [Line Items]
Receivables of VIEs	8	5
Regulatory Assets: Current	54	54
Current Assets: Other	17	39
Other Noncurrent Assets: Regulatory assets	840	883
Current Liabilities: Other	2	9
Current maturities of long-term debt	56	56
Long-Term Debt	890	946
DECNCSF | Duke Energy Carolinas | VIE primary beneficiary
Variable Interest Entities [Line Items]
Regulatory Assets: Current	12	12
Current Assets: Other	5
Other Noncurrent Assets: Regulatory assets	211	220
Other Noncurrent Assets: Other	1	1
Current Liabilities: Other	1	1
Current maturities of long-term debt	10	5
Long-Term Debt	219	228
DEPNCSF | Duke Energy Progress | VIE primary beneficiary
Variable Interest Entities [Line Items]
Regulatory Assets: Current	39	39
Current Assets: Other	17
Other Noncurrent Assets: Regulatory assets	691	720
Other Noncurrent Assets: Other	2	4
Current Liabilities: Other	4	2
Current maturities of long-term debt	34	15
Long-Term Debt	714	747
Commercial Renewables | VIE primary beneficiary
Variable Interest Entities [Line Items]
Current Assets: Other	201	215
Property, Plant and Equipment: Cost	7,554	7,339
Accumulated depreciation and amortization	(1,710)	(1,474)
Other Noncurrent Assets: Other	115	62
Current maturities of long-term debt	285	167
Long-Term Debt	1,252	1,475
Other Noncurrent Liabilities: AROs	178	173
Other Noncurrent Liabilities: Other	$ 202	$ 319