Variable Interest Entities (Schedule of Non-Consolidated VIEs) (Details) - USD ($) $ in Millions	Jun. 30, 2023	Dec. 31, 2022
Variable Interest Entities [Line Items]
Receivables from affiliated companies	$ 2,812	$ 3,106
Investments in equity method unconsolidated affiliates	479	455
Other noncurrent assets	3,444	3,400
Total Assets	180,076	178,086
Other current liabilities	2,094	2,167
Other	1,353	1,502
Duke Energy Ohio
Variable Interest Entities [Line Items]
Receivables from affiliated companies	89	73
Other noncurrent assets	74	71
Total Assets	11,791	11,506
Other current liabilities	66	74
Other	95	96
Duke Energy Ohio | Affiliated Entity
Variable Interest Entities [Line Items]
Receivables from affiliated companies	180	247
Duke Energy Ohio | VIE not primary beneficiary
Variable Interest Entities [Line Items]
Total Assets	131	198
Net assets	131	198
Duke Energy Ohio | VIE not primary beneficiary | Affiliated Entity
Variable Interest Entities [Line Items]
Receivables from affiliated companies	131	198
Duke Energy Indiana
Variable Interest Entities [Line Items]
Receivables from affiliated companies	178	112
Other noncurrent assets	278	254
Total Assets	14,615	14,654
Other current liabilities	179	161
Other	26	65
Duke Energy Indiana | Affiliated Entity
Variable Interest Entities [Line Items]
Receivables from affiliated companies	164	298
Duke Energy Indiana | VIE not primary beneficiary
Variable Interest Entities [Line Items]
Total Assets	183	317
Net assets	183	317
Duke Energy Indiana | VIE not primary beneficiary | Affiliated Entity
Variable Interest Entities [Line Items]
Receivables from affiliated companies	183	317
Pipeline Investments | VIE not primary beneficiary
Variable Interest Entities [Line Items]
Investments in equity method unconsolidated affiliates	58	43
Other noncurrent assets	46	45
Total Assets	104	88
Other current liabilities	23	59
Other	49	47
Total liabilities	72	106
Net assets	$ 32	$ (18)