Business Segments (Business Segment Data) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Segment Reporting Information [Line Items]
Operating Revenues	$ 7,671	$ 7,276
Segment income (loss)	1,102	910
Less: Noncontrolling interests	(13)	43
Add: Preferred stock dividend	39	39
Discontinued operations	(3)	(145)
Net Income	1,151	761
Segment assets	178,670		$ 176,893
Impairment of assets and other charges	1	8
Operation, maintenance and other	1,379	1,310
Duke Energy Ohio
Segment Reporting Information [Line Items]
Operating Revenues	678	709
Segment income (loss)	94	100
Net Income	94	100
Segment assets	12,305		$ 12,216
Operation, maintenance and other	126	123
Total Reportable Segments
Segment Reporting Information [Line Items]
Operating Revenues	7,664	7,269
Electric Utilities and Infrastructure
Segment Reporting Information [Line Items]
Operating Revenues	6,785	6,381
Gas Utilities and Infrastructure
Segment Reporting Information [Line Items]
Operating Revenues	879	888
Operating Segments | Total Reportable Segments
Segment Reporting Information [Line Items]
Operating Revenues	7,705	7,309
Segment income (loss)	1,305	1,078
Segment assets	174,070
Operating Segments | Total Reportable Segments | Duke Energy Ohio
Segment Reporting Information [Line Items]
Operating Revenues	678	709
Segment income (loss)	96	101
Segment assets	12,285
Operating Segments | Electric Utilities and Infrastructure
Segment Reporting Information [Line Items]
Operating Revenues	6,803	6,398
Segment income (loss)	1,021	791
Segment assets	156,606
Operating Segments | Electric Utilities and Infrastructure | Duke Energy Ohio
Segment Reporting Information [Line Items]
Operating Revenues	458	474
Segment income (loss)	55	49
Segment assets	7,935
Operating Segments | Gas Utilities and Infrastructure
Segment Reporting Information [Line Items]
Operating Revenues	902	911
Segment income (loss)	284	287
Segment assets	17,464
Operating Segments | Gas Utilities and Infrastructure | Duke Energy Ohio
Segment Reporting Information [Line Items]
Operating Revenues	220	235
Segment income (loss)	41	52
Segment assets	4,350
Other | Other | Duke Energy Ohio
Segment Reporting Information [Line Items]
Operating Revenues	0	0
Segment income (loss)	(2)	(1)
Segment assets	13
Corporate And Eliminations
Segment Reporting Information [Line Items]
Operating Revenues	38	31
Segment income (loss)	(203)	(168)
Segment assets	4,600
Eliminations
Segment Reporting Information [Line Items]
Operating Revenues	(72)	(64)
Segment income (loss)	0	0
Segment assets	0
Eliminations | Duke Energy Ohio
Segment Reporting Information [Line Items]
Operating Revenues	0
Segment income (loss)	0
Segment assets	7
Eliminations | Total Reportable Segments
Segment Reporting Information [Line Items]
Operating Revenues	41	40
Eliminations | Electric Utilities and Infrastructure
Segment Reporting Information [Line Items]
Operating Revenues	18	17
Eliminations | Gas Utilities and Infrastructure
Segment Reporting Information [Line Items]
Operating Revenues	23	23
Eliminations | Other
Segment Reporting Information [Line Items]
Operating Revenues	31	24
Other
Segment Reporting Information [Line Items]
Operating Revenues	$ 7	$ 7