Variable Interest Entities (Schedule of Non-Consolidated VIEs) (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Variable Interest Entity [Line Items]
Investments in equity method unconsolidated affiliates	$ 455	$ 457
Other noncurrent assets	3,400	3,632
Total Assets	178,086	169,587	$ 162,388
Other current liabilities	2,167	2,423
Other noncurrent liabilities	1,502	1,348
Duke Energy Ohio
Variable Interest Entity [Line Items]
Receivables from affiliated companies	247	122
Other noncurrent assets	71	84
Total Assets	11,506	10,774	$ 10,025
Other current liabilities	74	82
Other noncurrent liabilities	96	101
Duke Energy Ohio | Non-consolidated VIEs
Variable Interest Entity [Line Items]
Receivables from affiliated companies	198	79
Total Assets	198	79
Net (liabilities) assets	198	79
Duke Energy Indiana
Variable Interest Entity [Line Items]
Receivables from affiliated companies	298	98
Other noncurrent assets	254	296
Total Assets	14,654	14,488
Other current liabilities	161	105
Other noncurrent liabilities	65	44
Duke Energy Indiana | Non-consolidated VIEs
Variable Interest Entity [Line Items]
Receivables from affiliated companies	317	97
Total Assets	317	97
Net (liabilities) assets	317	97
Pipeline Investments | Non-consolidated VIEs
Variable Interest Entity [Line Items]
Investments in equity method unconsolidated affiliates	43	15
Other noncurrent assets	45	61
Total Assets	88	76
Other current liabilities	59	47
Other noncurrent liabilities	47	54
Total liabilities	106	101
Net (liabilities) assets	$ (18)	$ (25)