Variable Interest Entities (Consolidated VIEs) (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Variable Interest Entity [Line Items]
Regulatory Assets: Current	$ 3,648	$ 3,485
Current Assets: Other	431	973
Other Noncurrent Assets: Regulatory assets	13,618	14,645
Other (including amounts related to VIEs)	3,964	3,400
Current Liabilities: Other	2,319	2,167
Current maturities of long-term debt	2,800	3,878
Long-Term Debt	72,452	65,873
Duke Energy Florida
Variable Interest Entity [Line Items]
Regulatory Assets: Current	720	1,143
Current Assets: Other	51	108
Other Noncurrent Assets: Regulatory assets	1,883	2,422
Other (including amounts related to VIEs)	429	372
Current Liabilities: Other	350	363
Current maturities of long-term debt	589	328
Long-Term Debt	9,812	9,381
Duke Energy Carolinas
Variable Interest Entity [Line Items]
Regulatory Assets: Current	1,564	1,095
Current Assets: Other	31	216
Other Noncurrent Assets: Regulatory assets	3,916	4,293
Other (including amounts related to VIEs)	1,109	1,036
Current Liabilities: Other	702	580
Current maturities of long-term debt	19	1,018
Long-Term Debt	15,693	12,948
Duke Energy Progress
Variable Interest Entity [Line Items]
Regulatory Assets: Current	942	690
Current Assets: Other	72	174
Other Noncurrent Assets: Regulatory assets	4,546	4,724
Other (including amounts related to VIEs)	682	650
Current Liabilities: Other	481	384
Current maturities of long-term debt	72	369
Long-Term Debt	11,492	10,568
Consolidated VIEs
Variable Interest Entity [Line Items]
Regulatory Assets: Current	110	106
Current Assets: Other	90	116
Other Noncurrent Assets: Regulatory assets	1,642	1,715
Other (including amounts related to VIEs)	49	52
Current maturities of long-term debt	428	350
Long-Term Debt	3,000	3,108
Consolidated VIEs | Duke Energy Florida
Variable Interest Entity [Line Items]
Regulatory Assets: Current	59	55
Current Assets: Other	37	46
Other Noncurrent Assets: Regulatory assets	803	826
Current maturities of long-term debt	384	306
Long-Term Debt	831	890
Consolidated VIEs | Duke Energy Carolinas
Variable Interest Entity [Line Items]
Regulatory Assets: Current	12	12
Current Assets: Other	9	8
Other Noncurrent Assets: Regulatory assets	196	208
Current maturities of long-term debt	10	10
Long-Term Debt	708	689
Consolidated VIEs | Duke Energy Progress
Variable Interest Entity [Line Items]
Regulatory Assets: Current	39	39
Current Assets: Other	31	42
Other Noncurrent Assets: Regulatory assets	643	681
Current maturities of long-term debt	34	34
Long-Term Debt	1,079	1,114
Consolidated VIEs | DEFPF | Duke Energy Florida
Variable Interest Entity [Line Items]
Receivables of VIEs		6
Regulatory Assets: Current	59	55
Current Assets: Other	37	41
Other Noncurrent Assets: Regulatory assets	803	826
Current Liabilities: Other	8	9
Current maturities of long-term debt	59	56
Long-Term Debt	831	890
Consolidated VIEs | DECNCSF | Duke Energy Carolinas
Variable Interest Entity [Line Items]
Regulatory Assets: Current	12	12
Current Assets: Other	9	8
Other Noncurrent Assets: Regulatory assets	196	208
Other (including amounts related to VIEs)	1	1
Current Liabilities: Other	3	3
Current maturities of long-term debt	10	10
Long-Term Debt	208	219
Consolidated VIEs | DEPNCSF | Duke Energy Progress
Variable Interest Entity [Line Items]
Regulatory Assets: Current	39	39
Current Assets: Other	31	29
Other Noncurrent Assets: Regulatory assets	643	681
Other (including amounts related to VIEs)	2	2
Current Liabilities: Other	8	8
Current maturities of long-term debt	34	34
Long-Term Debt	$ 680	$ 714