Variable Interest Entities (Schedule of Consolidated VIEs) (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Variable Interest Entities [Line Items]
Regulatory Assets: Current	$ 3,082	$ 3,648
Current Assets: Other	359	431
Other Noncurrent Assets: Regulatory assets	13,636	13,618
Other	4,072	3,964
Current Liabilities: Other	2,084	2,319
Current maturities of long-term debt	2,274	2,800
Long-Term Debt	74,979	72,452
Inventory	4,281	4,292
Accounts payable	3,364	4,228
Duke Energy Florida
Variable Interest Entities [Line Items]
Regulatory Assets: Current	525	720
Current Assets: Other	57	51
Other Noncurrent Assets: Regulatory assets	1,895	1,883
Other	456	429
Current Liabilities: Other	332	350
Current maturities of long-term debt	586	589
Long-Term Debt	9,791	9,812
Inventory	693	674
Accounts payable	616	738
Duke Energy Carolinas
Variable Interest Entities [Line Items]
Regulatory Assets: Current	1,347	1,564
Current Assets: Other	62	31
Other Noncurrent Assets: Regulatory assets	3,850	3,916
Other	1,116	1,109
Current Liabilities: Other	617	702
Current maturities of long-term debt	520	19
Long-Term Debt	16,199	15,693
Inventory	1,478	1,484
Accounts payable	925	1,183
Duke Energy Progress
Variable Interest Entities [Line Items]
Regulatory Assets: Current	834	942
Current Assets: Other	58	72
Other Noncurrent Assets: Regulatory assets	4,631	4,546
Other	715	682
Current Liabilities: Other	429	481
Current maturities of long-term debt	73	72
Long-Term Debt	11,955	11,492
Inventory	1,294	1,227
Accounts payable	557	634
DEFPF | Duke Energy Florida | VIE primary beneficiary
Variable Interest Entities [Line Items]
Regulatory Assets: Current	59	59
Current Assets: Other	9	37
Other Noncurrent Assets: Regulatory assets	790	803
Current Liabilities: Other	2	8
Current maturities of long-term debt	59	59
Long-Term Debt	800	831
DECNCSF | Duke Energy Carolinas | VIE primary beneficiary
Variable Interest Entities [Line Items]
Regulatory Assets: Current	12	12
Current Assets: Other	5	9
Other Noncurrent Assets: Regulatory assets	193	196
Other	1	1
Current Liabilities: Other	1	10
Current maturities of long-term debt	11	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	18	31
Other Noncurrent Assets: Regulatory assets	633	643
Other	4	2
Current Liabilities: Other	4	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	470	462
Accounts payable	$ 179	$ 188