Variable Interest Entities (Schedule of Non-Consolidated VIEs) (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Variable Interest Entities [Line Items]
Receivables from affiliated companies	$ 2,253	$ 3,019
Investments in equity method unconsolidated affiliates	502	492
Other noncurrent assets	4,072	3,964
Total Assets	178,670	176,893
Other current liabilities	2,084	2,319
Other	1,352	1,393
Duke Energy Ohio
Variable Interest Entities [Line Items]
Receivables from affiliated companies	437	112
Other noncurrent assets	98	84
Total Assets	12,305	12,216
Other current liabilities	64	65
Other	87	86
Duke Energy Ohio | Affiliated Entity
Variable Interest Entities [Line Items]
Receivables from affiliated companies	3	239
Duke Energy Ohio | VIE not primary beneficiary
Variable Interest Entities [Line Items]
Investments in equity method unconsolidated affiliates	0	0
Other noncurrent assets	0	0
Total Assets	0	150
Other current liabilities	0	0
Other	0	0
Total liabilities	0	0
Net assets	0	150
Duke Energy Ohio | VIE not primary beneficiary | Affiliated Entity
Variable Interest Entities [Line Items]
Receivables from affiliated companies	0	150
Duke Energy Indiana
Variable Interest Entities [Line Items]
Receivables from affiliated companies	429	156
Other noncurrent assets	353	325
Total Assets	14,940	14,811
Other current liabilities	179	184
Other	13	0
Duke Energy Indiana | Affiliated Entity
Variable Interest Entities [Line Items]
Receivables from affiliated companies	12	197
Duke Energy Indiana | VIE not primary beneficiary
Variable Interest Entities [Line Items]
Investments in equity method unconsolidated affiliates	0	0
Other noncurrent assets	0	0
Total Assets	0	208
Other current liabilities	0	0
Other	0	0
Total liabilities	0	0
Net assets	0	208
Duke Energy Indiana | VIE not primary beneficiary | Affiliated Entity
Variable Interest Entities [Line Items]
Receivables from affiliated companies	0	208
Pipeline Investments | VIE not primary beneficiary
Variable Interest Entities [Line Items]
Investments in equity method unconsolidated affiliates	63	67
Other noncurrent assets	30	43
Total Assets	93	110
Other current liabilities	1	4
Other	6	5
Total liabilities	7	9
Net assets	86	101
Pipeline Investments | VIE not primary beneficiary | Affiliated Entity
Variable Interest Entities [Line Items]
Receivables from affiliated companies	$ 0	$ 0