Business Segments (Business Segment Data) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Segment Reporting Information [Line Items]
Operating Revenues	$ 6,685	$ 5,758	$ 13,817	$ 11,908
Segment income (loss)	893	751	1,711	1,704
Less: Noncontrolling interests	27	67	64	118
Add: Preferred stock dividend	14	14	53	53
Net Income	880	698	1,700	1,639
Segment assets	172,383		172,383		$ 169,587
Impairment of assets and other charges	(9)	131	206	131
Unregulated operating revenue	(186)	(198)	(383)	(380)
Incurred costs	1,447	1,410	3,077	2,812
Equity in earnings (losses) of unconsolidated affiliates	36	9	61	(8)
Income before taxes	(957)	(734)	(1,763)	(1,759)
Impairment charges
Segment Reporting Information [Line Items]
Impairment of assets and other charges	131		211	131
Operations, maintenance and other
Segment Reporting Information [Line Items]
Impairment of assets and other charges	27		27
Depreciation and amortization
Segment Reporting Information [Line Items]
Impairment of assets and other charges	17		17
Regulated Electric Revenues
Segment Reporting Information [Line Items]
Impairment of assets and other charges			46
Duke Energy Carolinas
Segment Reporting Information [Line Items]
Operating Revenues	1,781	1,610	3,669	3,326
Segment assets	47,774		47,774		47,162
Impairment of assets and other charges	(12)	75	(9)	75
Incurred costs	462	435	974	876
Income before taxes	(354)	(226)	(721)	(561)
Duke Energy Ohio
Segment Reporting Information [Line Items]
Operating Revenues	545	456	1,183	988
Segment income (loss)	56	39	133	130
Segment assets	11,015		11,015		10,774
Impairment of assets and other charges		5		5
Incurred costs	109	111	287	219
Income before taxes	(65)	(50)	(86)	(155)
Duke Energy Progress
Segment Reporting Information [Line Items]
Operating Revenues	1,581	1,349	3,213	2,750
Segment assets	35,336		35,336		$ 35,383
Impairment of assets and other charges	4	18	4	18
Incurred costs	360	367	751	724
Income before taxes	(254)	(221)	(504)	(450)
Electric Utilities and Infrastructure
Segment Reporting Information [Line Items]
Operating Revenues	6,126	5,328	12,121	10,601
Gas Utilities and Infrastructure
Segment Reporting Information [Line Items]
Operating Revenues	430	305	1,439	1,057
Gas Utilities and Infrastructure | Asset Impairment for Regulatory Action
Segment Reporting Information [Line Items]
Equity in earnings (losses) of unconsolidated affiliates		(16)
Commercial Renewables
Segment Reporting Information [Line Items]
Operating Revenues	121	119	242	238
Total Reportable Segments
Segment Reporting Information [Line Items]
Operating Revenues	6,677	5,752	13,802	11,896
Operating Segments | Electric Utilities and Infrastructure
Segment Reporting Information [Line Items]
Operating Revenues	6,135	5,335	12,137	10,616
Segment income (loss)	974	935	1,697	1,755
Segment assets	145,874		145,874
Operating Segments | Electric Utilities and Infrastructure | Duke Energy Supreme Court Ruling
Segment Reporting Information [Line Items]
Less: Noncontrolling interests	(2)		(20)
Operating Segments | Electric Utilities and Infrastructure | Duke Energy Ohio
Segment Reporting Information [Line Items]
Operating Revenues	401	343	813	706
Segment income (loss)	37	24	78	74
Segment assets	7,237		7,237
Operating Segments | Gas Utilities and Infrastructure
Segment Reporting Information [Line Items]
Operating Revenues	453	327	1,485	1,102
Segment income (loss)	19	17	273	262
Segment assets	15,420		15,420
Equity in earnings (losses) of unconsolidated affiliates				22
Operating Segments | Gas Utilities and Infrastructure | Duke Energy Ohio
Segment Reporting Information [Line Items]
Operating Revenues	144	113	370	282
Segment income (loss)	19	23	57	66
Segment assets	3,899		3,899
Operating Segments | Commercial Renewables
Segment Reporting Information [Line Items]
Operating Revenues	121	119	242	238
Segment income (loss)	30	47	41	74
Segment assets	7,276		7,276
Operating Segments | Commercial Renewables | Texas Storm Uri
Segment Reporting Information [Line Items]
Less: Noncontrolling interests			12
Unregulated operating revenue			(8)
Incurred costs			2
Equity in earnings (losses) of unconsolidated affiliates			29
Income before taxes			35
Operating Segments | Total Reportable Segments
Segment Reporting Information [Line Items]
Operating Revenues	6,709	5,781	13,864	11,956
Segment income (loss)	1,023	999	2,011	2,091
Segment assets	168,570		168,570
Operating Segments | Total Reportable Segments | Duke Energy Ohio
Segment Reporting Information [Line Items]
Operating Revenues	545	456	1,183	988
Segment income (loss)	56	47	135	140
Segment assets	11,136		11,136
Operating Segments | Nonregulated Segment
Segment Reporting Information [Line Items]
Segment income (loss)			21
Loss on derivative instruments	21
Other
Segment Reporting Information [Line Items]
Segment assets	3,821		3,821
Other | Other | Duke Energy Ohio
Segment Reporting Information [Line Items]
Segment income (loss)		(8)	(2)	(10)
Segment assets	14		14
Corporate And Eliminations
Segment Reporting Information [Line Items]
Operating Revenues	30	27	60	53
Segment income (loss)	(130)	(248)	(300)	(387)
Eliminations
Segment Reporting Information [Line Items]
Operating Revenues	(54)	(50)	(107)	(101)
Segment assets	(8)		(8)
Eliminations | Duke Energy Ohio
Segment Reporting Information [Line Items]
Segment assets	(135)		(135)
Eliminations | Electric Utilities and Infrastructure
Segment Reporting Information [Line Items]
Operating Revenues	9	7	16	15
Eliminations | Gas Utilities and Infrastructure
Segment Reporting Information [Line Items]
Operating Revenues	23	22	46	45
Eliminations | Total Reportable Segments
Segment Reporting Information [Line Items]
Operating Revenues	32	29	62	60
Eliminations | Other
Segment Reporting Information [Line Items]
Operating Revenues	22	21	45	41
Other
Segment Reporting Information [Line Items]
Operating Revenues	$ 8	$ 6	$ 15	$ 12