Condensed Consolidated Statements of Operations and Comprehensive Income - USD ($) shares in Millions, $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Operating Revenues
Regulated electric		$ 4,963	$ 5,423	$ 10,087	$ 10,708
Regulated natural gas		263	280	901	1,008
Nonregulated electric and other		195	170	382	320
Total operating revenues		5,421	5,873	11,370	12,036
Operating Expenses
Operation, maintenance and other		1,353	1,434	2,692	2,853
Depreciation and amortization		1,150	1,089	2,280	2,178
Property and other taxes		334	334	679	677
Impairment charges		6	4	8	4
Total operating expenses		4,251	4,578	8,713	9,365
Gains (Losses) on Sales of Other Assets and Other, net		7	3	8
Operating Income		1,177	1,298	2,665	2,671
Other Income and Expenses
Equity in (losses) earnings of unconsolidated affiliates		(1,968)	44	(1,924)	87
Other Nonoperating Income (Expense)		137	89	183	204
Total other income and expenses		(1,831)	133	(1,741)	291
Interest Expense		554	542	1,105	1,085
(Loss) Income Before Income Taxes		(1,208)	889	(181)	1,877
Income Tax (Benefit) Expense		(316)	141	(179)	236
Net (Loss) Income		(892)	748	(2)	1,641
Add: Net Loss Attributable to Noncontrolling Interests		90	84	138	91
Net income (attributable to parent)		(802)	832	136	1,732
Less: Preferred Dividends		15	12	54	12
Net (Loss) Income Available to Duke Energy Corporation Common Stockholders		(817)	820	82	1,720
Other Comprehensive Income (Loss), net of tax
Pension and OPEB adjustments	[1]	(1)	3		3
Net unrealized (losses) gains on cash flow hedges	[1]	5	(29)	(76)	(46)
Unrealized (losses) gains on available-for-sale securities	[1]	6	4	7	8
Other Comprehensive Income (Loss), net of tax	[1]	12	(20)	(65)	(32)
Comprehensive (Loss) Income		(880)	728	(67)	1,609
Add: Comprehensive Loss Attributable to Noncontrolling Interests		(88)	(84)	(150)	(91)
Comprehensive (Loss) Income Attributable to Duke Energy		$ (792)	$ 812	$ 83	$ 1,700
Net income attributable to Duke Energy Corporation common stockholders
Basic and Diluted (in usd per share)		$ (1.13)	$ 1.12	$ 0.11	$ 2.36
Weighted average shares outstanding
Weighted Average Number of Shares Outstanding, Basic		735	728	734	728
Weighted Average Number of Shares Outstanding, Diluted		735	728	735	728
Duke Energy Carolinas
Operating Revenues
Total operating revenues		$ 1,610	$ 1,713	$ 3,358	$ 3,457
Operating Expenses
Fuel used in electric generation and purchased power/Cost of natural gas		376	395	829	867
Operation, maintenance and other		430	441	816	881
Depreciation and amortization		375	346	718	663
Property and other taxes		75	75	156	155
Impairment charges			5	2	5
Total operating expenses		1,256	1,262	2,521	2,571
Gains (Losses) on Sales of Other Assets and Other, net		(1)
Operating Income		353	451	837	886
Other Income and Expenses
Total other income and expenses		43	41	86	72
Interest Expense		125	117	248	227
(Loss) Income Before Income Taxes		271	375	675	731
Income Tax (Benefit) Expense		37	74	102	137
Net income (attributable to parent)		234	301	573	594
Other Comprehensive Income (Loss), net of tax
Comprehensive (Loss) Income Attributable to Duke Energy		234	301	573	594
Progress Energy
Operating Revenues
Total operating revenues		2,498	2,744	4,920	5,316
Operating Expenses
Fuel used in electric generation and purchased power/Cost of natural gas		777	988	1,540	1,913
Operation, maintenance and other		589	606	1,143	1,173
Depreciation and amortization		432	426	884	881
Property and other taxes		137	143	272	280
Total operating expenses		1,935	2,163	3,839	4,247
Gains (Losses) on Sales of Other Assets and Other, net		7	(1)	6	(1)
Operating Income		570	580	1,087	1,068
Other Income and Expenses
Total other income and expenses		33	34	65	65
Interest Expense		199	219	405	438
(Loss) Income Before Income Taxes		404	395	747	695
Income Tax (Benefit) Expense		60	66	120	118
Net (Loss) Income		344	329	627	577
Add: Net Loss Attributable to Noncontrolling Interests		0	(1)		0
Net income (attributable to parent)		344	328	627	577
Other Comprehensive Income (Loss), net of tax
Pension and OPEB adjustments		1	1	1	2
Net unrealized (losses) gains on cash flow hedges		1	1	2	3
Unrealized (losses) gains on available-for-sale securities		(1)	1	0	1
Other Comprehensive Income (Loss), net of tax		1	3	3	6
Comprehensive (Loss) Income		345	332	630	583
Add: Comprehensive Loss Attributable to Noncontrolling Interests			1		0
Comprehensive (Loss) Income Attributable to Duke Energy		345	331	630	583
Duke Energy Progress
Operating Revenues
Total operating revenues		1,243	1,387	2,581	2,871
Operating Expenses
Fuel used in electric generation and purchased power/Cost of natural gas		395	479	800	994
Operation, maintenance and other		317	357	622	692
Depreciation and amortization		257	251	544	541
Property and other taxes		44	41	91	85
Total operating expenses		1,013	1,128	2,057	2,312
Gains (Losses) on Sales of Other Assets and Other, net		6		5
Operating Income		236	259	529	559
Other Income and Expenses
Total other income and expenses		19	24	41	48
Interest Expense		68	81	137	158
(Loss) Income Before Income Taxes		187	202	433	449
Income Tax (Benefit) Expense		26	33	68	77
Net income (attributable to parent)		161	169	365	372
Other Comprehensive Income (Loss), net of tax
Comprehensive (Loss) Income Attributable to Duke Energy		161	169	365	372
Duke Energy Florida
Operating Revenues
Total operating revenues		1,250	1,353	2,330	2,439
Operating Expenses
Fuel used in electric generation and purchased power/Cost of natural gas		382	509	740	919
Operation, maintenance and other		269	244	514	474
Depreciation and amortization		175	175	340	340
Property and other taxes		92	103	180	196
Total operating expenses		918	1,031	1,774	1,929
Gains (Losses) on Sales of Other Assets and Other, net			(1)		(1)
Operating Income		332	321	556	509
Other Income and Expenses
Total other income and expenses		15	12	25	25
Interest Expense		80	83	164	165
(Loss) Income Before Income Taxes		267	250	417	369
Income Tax (Benefit) Expense		51	49	81	72
Net income (attributable to parent)		216	201	336	297
Other Comprehensive Income (Loss), net of tax
Unrealized (losses) gains on available-for-sale securities		(1)			1
Other Comprehensive Income (Loss), net of tax		(1)			1
Comprehensive (Loss) Income Attributable to Duke Energy		215	201	336	298
Duke Energy Ohio
Operating Revenues
Regulated electric		330	336	676	691
Regulated natural gas		93	97	245	273
Total operating revenues		423	433	921	964
Operating Expenses
Operation, maintenance and other		95	123	218	255
Depreciation and amortization		68	66	136	130
Property and other taxes		78	74	161	158
Total operating expenses		324	359	722	786
Operating Income		99	74	199	178
Other Income and Expenses
Total other income and expenses		4	6	7	15
Interest Expense		25	24	49	54
(Loss) Income Before Income Taxes		78	56	157	139
Income Tax (Benefit) Expense		12	9	26	23
Net income (attributable to parent)		66	47	131	116
Other Comprehensive Income (Loss), net of tax
Comprehensive (Loss) Income Attributable to Duke Energy		66	47	131	116
Duke Energy Indiana
Operating Revenues
Total operating revenues		617	714	1,309	1,482
Operating Expenses
Fuel used in electric generation and purchased power/Cost of natural gas		161	229	355	486
Operation, maintenance and other		171	188	357	377
Depreciation and amortization		134	132	266	263
Property and other taxes		20	20	42	39
Total operating expenses		486	569	1,020	1,165
Gains (Losses) on Sales of Other Assets and Other, net			3
Operating Income		131	148	289	317
Other Income and Expenses
Total other income and expenses		9	8	19	27
Interest Expense		42	28	85	71
(Loss) Income Before Income Taxes		98	128	223	273
Income Tax (Benefit) Expense		17	31	43	66
Net income (attributable to parent)		81	97	180	207
Other Comprehensive Income (Loss), net of tax
Comprehensive (Loss) Income Attributable to Duke Energy		81	97	180	207
Piedmont Natural Gas
Operating Revenues
Total operating revenues		197	209	709	788
Operating Expenses
Fuel used in electric generation and purchased power/Cost of natural gas		53	65	215	338
Operation, maintenance and other		79	83	159	163
Depreciation and amortization		43	42	88	84
Property and other taxes		12	13	24	25
Total operating expenses		187	203	486	610
Operating Income		10	6	223	178
Other Income and Expenses
Equity in (losses) earnings of unconsolidated affiliates				4	4
Total other income and expenses		16	6	28	12
Interest Expense		33	21	60	43
(Loss) Income Before Income Taxes		(7)	(9)	191	147
Income Tax (Benefit) Expense		(9)	(2)	11	32
Net income (attributable to parent)		2	(7)	180	115
Other Comprehensive Income (Loss), net of tax
Comprehensive (Loss) Income Attributable to Duke Energy		2	(7)	180	115
Fuel used in electric generation and purchased power
Operating Expenses
Fuel used in electric generation and purchased power/Cost of natural gas		1,349	1,641	2,796	3,250
Fuel used in electric generation and purchased power | Duke Energy Ohio
Operating Expenses
Fuel used in electric generation and purchased power/Cost of natural gas		77	86	164	179
Cost of natural gas
Operating Expenses
Fuel used in electric generation and purchased power/Cost of natural gas		59	76	258	403
Cost of natural gas | Duke Energy Ohio
Operating Expenses
Fuel used in electric generation and purchased power/Cost of natural gas		$ 6	$ 10	$ 43	$ 64

[1] Net of income tax impacts of approximately $20 million and $10 million for the six months ended June 30, 2020, and 2019, respectively. All other periods presented include immaterial income tax impacts.