Variable Interest Entities (Schedule of Consolidated VIEs) (Details) - USD ($) $ in Millions	Jun. 30, 2024	Dec. 31, 2023
Variable Interest Entities [Line Items]
Regulatory Assets: Current	$ 2,663	$ 3,648
Current Assets: Other	436	431
Other Noncurrent Assets: Regulatory assets	13,446	13,618
Other	3,556	3,964
Current Liabilities: Other	2,212	2,319
Current maturities of long-term debt	2,340	2,800
Long-Term Debt	76,439	72,452
Inventory	4,390	4,292
Accounts payable	3,777	4,228
Duke Energy Florida
Variable Interest Entities [Line Items]
Regulatory Assets: Current	367	720
Current Assets: Other	61	51
Other Noncurrent Assets: Regulatory assets	1,939	1,883
Other	461	429
Current Liabilities: Other	323	350
Current maturities of long-term debt	435	589
Long-Term Debt	9,838	9,812
Inventory	716	674
Accounts payable	735	738
Duke Energy Carolinas
Variable Interest Entities [Line Items]
Regulatory Assets: Current	1,122	1,564
Current Assets: Other	56	31
Other Noncurrent Assets: Regulatory assets	3,711	3,916
Other	1,158	1,109
Current Liabilities: Other	635	702
Current maturities of long-term debt	520	19
Long-Term Debt	16,206	15,693
Inventory	1,509	1,484
Accounts payable	1,125	1,183
Duke Energy Progress
Variable Interest Entities [Line Items]
Regulatory Assets: Current	785	942
Current Assets: Other	73	72
Other Noncurrent Assets: Regulatory assets	4,487	4,546
Other	694	682
Current Liabilities: Other	493	481
Current maturities of long-term debt	479	72
Long-Term Debt	11,714	11,492
Inventory	1,303	1,227
Accounts payable	523	634
DEFPF | Duke Energy Florida | VIE primary beneficiary
Variable Interest Entities [Line Items]
Regulatory Assets: Current	60	59
Current Assets: Other	32	37
Other Noncurrent Assets: Regulatory assets	775	803
Current Liabilities: Other	8	8
Current maturities of long-term debt	59	59
Long-Term Debt	801	831
DECNCSF | Duke Energy Carolinas | VIE primary beneficiary
Variable Interest Entities [Line Items]
Regulatory Assets: Current	12	12
Current Assets: Other	10	9
Other Noncurrent Assets: Regulatory assets	191	196
Other	1	1
Current Liabilities: Other	2	10
Current maturities of long-term debt	10	3
Long-Term Debt	203	208
DEPNCSF | Duke Energy Progress | VIE primary beneficiary
Variable Interest Entities [Line Items]
Regulatory Assets: Current	39	39
Current Assets: Other	31	31
Other Noncurrent Assets: Regulatory assets	626	643
Other	4	2
Current Liabilities: Other	10	34
Current maturities of long-term debt	34	8
Long-Term Debt	663	680
DEF ProCo | Duke Energy Florida | VIE primary beneficiary
Variable Interest Entities [Line Items]
Inventory	494	462
Accounts payable	213	$ 188
DEPSCSF | Duke Energy Progress | VIE primary beneficiary
Variable Interest Entities [Line Items]
Regulatory Assets: Current	9
Other Noncurrent Assets: Regulatory assets	162
Current maturities of long-term debt	6
Long-Term Debt	$ 166