Consolidated Statements of Cash Flows - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
CASH FLOWS FROM OPERATING ACTIVITIES
Net income		$ 2,455	$ 3,579	$ 1,082
Net loss attributable to Duke Energy		2,550	3,908	1,377
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion (including amortization of nuclear fuel)		5,843	5,663	5,486
Equity in (earnings) losses of unconsolidated affiliates		(114)	(28)	2,005
Equity component of AFUDC		(197)	(171)	(154)
Impairment of assets and other charges		2,183	356	984
Deferred income taxes		(200)	191	54
Contributions to qualified pension plans		(58)
Payments for asset retirement obligations		(584)	(540)	(610)
Provision for rate refunds		(130)	(70)	(22)
Refund of AMT credit carryforwards				572
(Increase) decrease in
Net realized and unrealized mark-to-market and hedging transactions		19	50	63
Receivables		(788)	(297)	(56)
Inventory		(476)	(34)	66
Other current assets	[1]	(1,498)	(1,136)	205
Increase (decrease) in
Accounts payable		805	249	(21)
Taxes accrued		10	284	117
Other current liabilities		(153)	(13)	(65)
Other assets	[1]	(1,600)	112	(408)
Other liabilities		410	95	(442)
Net cash provided by (used in) operating activities		5,927	8,290	8,856
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures		(11,367)	(9,715)	(9,907)
Contributions to equity method investments		(58)	(81)	(370)
Return of investment capital		6	44	133
Purchases of debt and equity securities		(4,243)	(6,098)	(8,011)
Proceeds from sales and maturities of debt and equity securities		4,333	6,103	7,949
Disbursements to canceled equity method investments			(855)
Other		(644)	(333)	(398)
Net cash used in investing activities		(11,973)	(10,935)	(10,604)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from the issuance of long-term debt		11,874	9,052	6,330
Proceeds from the issuance of common stock		9	5	2,745
Payments for the redemption of long-term debt		(4,396)	(5,294)	(4,506)
Proceeds from the issuance of short-term debt with original maturities greater than 90 days		80	332	3,009
Payments for the redemption of short-term debt with original maturities greater than 90 days		(287)	(997)	(2,147)
Notes payable and commercial paper		781	1,144	(1,181)
Contributions from noncontrolling interests		1,377	1,575	426
Dividends paid		(3,179)	(3,114)	(2,812)
Other		(130)	(94)	(133)
Net cash provided by financing activities		6,129	2,609	1,731
Net increase (decrease) in cash, cash equivalents and restricted cash		83	(36)	(17)
Cash, cash equivalents and restricted cash at beginning of period		520	556	573
Cash, cash equivalents and restricted cash at end of period		603	520	556
Cash, cash equivalents and restricted cash at beginning of period		341
Cash, cash equivalents and restricted cash at end of period		409	341
Supplemental Disclosures:
Cash paid for interest, net of amount capitalized		2,361	2,248	2,186
Cash received from income taxes		(6)	(3)	(585)
Significant non-cash transactions:
Accrued capital expenditures		1,766	1,325	1,116
Non-cash dividends				110
Duke Energy Carolinas
CASH FLOWS FROM OPERATING ACTIVITIES
Net loss attributable to Duke Energy		1,600	1,336	956
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion (including amortization of nuclear fuel)		1,787	1,743	1,731
Equity component of AFUDC		(98)	(65)	(62)
Impairment of assets and other charges		26	227	476
Deferred income taxes		210	(213)	(260)
Contributions to qualified pension plans		(15)
Payments for asset retirement obligations		(200)	(182)	(162)
Provision for rate refunds		(74)	(46)	(5)
(Increase) decrease in
Net realized and unrealized mark-to-market and hedging transactions				(4)
Receivables		(102)	(99)	52
Receivables from affiliated companies		(200)	(66)	(10)
Inventory		(138)	(16)	(14)
Other current assets	[2]	(592)	(309)	209
Increase (decrease) in
Accounts payable		377	5	55
Accounts payable to affiliated companies		(75)	85	(11)
Taxes accrued		(46)	206	30
Other current liabilities		(91)	(39)	(56)
Other assets	[2]	(764)	21	(102)
Other liabilities		(36)	116	(47)
Net cash provided by (used in) operating activities		1,569	2,704	2,776
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures		(3,304)	(2,693)	(2,669)
Purchases of debt and equity securities		(2,633)	(3,425)	(1,602)
Proceeds from sales and maturities of debt and equity securities		2,633	3,425	1,602
Other		(181)	(177)	(164)
Net cash used in investing activities		(3,485)	(2,870)	(2,833)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from the issuance of long-term debt		1,441	1,651	998
Payments for the redemption of long-term debt		(436)	(617)	(813)
Notes payable to affiliated companies		1,007	(280)	477
Distributions to parent		(50)	(600)	(600)
Other		(1)	(1)	(2)
Net cash provided by financing activities		1,961	153	60
Net increase (decrease) in cash, cash equivalents and restricted cash		45	(13)	3
Cash, cash equivalents and restricted cash at beginning of period		8	21	18
Cash, cash equivalents and restricted cash at end of period		53	8	21
Cash, cash equivalents and restricted cash at beginning of period		7
Cash, cash equivalents and restricted cash at end of period		44	7
Supplemental Disclosures:
Cash paid for interest, net of amount capitalized		546	508	481
Cash received from income taxes		(60)	233	321
Significant non-cash transactions:
Accrued capital expenditures		475	359	365
Progress Energy
CASH FLOWS FROM OPERATING ACTIVITIES
Net income		1,828	1,599	1,046
Net loss attributable to Duke Energy		1,828	1,598	1,045
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion (including amortization of nuclear fuel)		2,405	2,302	2,327
Equity component of AFUDC		(68)	(51)	(42)
Impairment of assets and other charges		12	82	495
Deferred income taxes		364	247	(197)
Contributions to qualified pension plans		(13)
Payments for asset retirement obligations		(291)	(288)	(384)
Provision for rate refunds		(58)	(36)	2
(Increase) decrease in
Net realized and unrealized mark-to-market and hedging transactions			51	(9)
Receivables		(322)	(97)	(69)
Receivables from affiliated companies		117	18	(81)
Inventory		(183)	(26)	49
Other current assets	[3]	(937)	(551)	223
Increase (decrease) in
Accounts payable		222	59	(62)
Accounts payable to affiliated companies		206	217	(21)
Taxes accrued		8	13	75
Other current liabilities		96	(32)	139
Other assets	[3]	(1,116)	(110)	(137)
Other liabilities		573	(99)	(177)
Net cash provided by (used in) operating activities		2,843	3,298	3,177
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures		(4,317)	(3,668)	(3,488)
Purchases of debt and equity securities		(1,341)	(2,233)	(5,998)
Proceeds from sales and maturities of debt and equity securities		1,417	2,322	6,010
Notes receivable from affiliated companies			0	164
Other		(137)	(156)	(160)
Net cash used in investing activities		(4,378)	(3,735)	(3,472)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from the issuance of long-term debt		2,775	3,095	1,791
Payments for the redemption of long-term debt		(1,173)	(1,883)	(2,157)
Notes payable to affiliated companies		465	(160)	1,148
Dividends to parent		(425)	(700)	(400)
Other		(36)	(2)	(13)
Net cash provided by financing activities		1,606	350	369
Net increase (decrease) in cash, cash equivalents and restricted cash		71	(87)	74
Cash, cash equivalents and restricted cash at beginning of period		113	200	126
Cash, cash equivalents and restricted cash at end of period		184	113	200
Cash, cash equivalents and restricted cash at beginning of period		70
Cash, cash equivalents and restricted cash at end of period		108	70
Supplemental Disclosures:
Cash paid for interest, net of amount capitalized		854	813	819
Cash received from income taxes		79	14	149
Significant non-cash transactions:
Accrued capital expenditures		663	501	363
Duke Energy Progress
CASH FLOWS FROM OPERATING ACTIVITIES
Net loss attributable to Duke Energy		1,008	991	415
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion (including amortization of nuclear fuel)		1,371	1,286	1,299
Equity component of AFUDC		(52)	(34)	(29)
Impairment of assets and other charges		7	63	499
Deferred income taxes		121	(46)	(234)
Contributions to qualified pension plans		(8)
Payments for asset retirement obligations		(193)	(187)	(304)
Provision for rate refunds		(58)	(36)	2
(Increase) decrease in
Net realized and unrealized mark-to-market and hedging transactions			48	1
Receivables		(228)	(52)	(4)
Receivables from affiliated companies		58	(33)	2
Inventory		(85)	(11)	23
Other current assets	[4]	(207)	(147)	98
Increase (decrease) in
Accounts payable		20	12	(127)
Accounts payable to affiliated companies		198	95	12
Taxes accrued		(86)	83	68
Other current liabilities		13	(23)	157
Other assets	[4]	(416)	(37)	(215)
Other liabilities		38	(16)	3
Net cash provided by (used in) operating activities		1,501	1,956	1,666
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures		(2,070)	(1,746)	(1,581)
Purchases of debt and equity securities		(1,148)	(1,931)	(1,555)
Proceeds from sales and maturities of debt and equity securities		1,138	1,914	1,516
Other		(29)	(20)	(57)
Net cash used in investing activities		(2,109)	(1,783)	(1,677)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from the issuance of long-term debt		1,477	1,959	1,296
Payments for the redemption of long-term debt		(645)	(1,308)	(1,085)
Notes payable to affiliated companies		67	(123)	229
Distributions to parent		(250)	(700)	(400)
Other		(1)	(1)	(12)
Net cash provided by financing activities		648	(173)	28
Net increase (decrease) in cash, cash equivalents and restricted cash		40	0	17
Cash, cash equivalents and restricted cash at beginning of period		39	39	22
Cash, cash equivalents and restricted cash at end of period		79	39	39
Cash, cash equivalents and restricted cash at beginning of period		35
Cash, cash equivalents and restricted cash at end of period		49	35
Supplemental Disclosures:
Cash paid for interest, net of amount capitalized		386	335	301
Cash received from income taxes		157	83	123
Significant non-cash transactions:
Accrued capital expenditures		269	163	149
Duke Energy Florida
CASH FLOWS FROM OPERATING ACTIVITIES
Net loss attributable to Duke Energy		909	738	771
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion (including amortization of nuclear fuel)		1,032	1,011	1,019
Equity component of AFUDC		(16)	(16)	(12)
Impairment of assets and other charges		4	19	(4)
Deferred income taxes		285	279	27
Contributions to qualified pension plans		(5)
Payments for asset retirement obligations		(98)	(101)	(80)
(Increase) decrease in
Net realized and unrealized mark-to-market and hedging transactions			0	(14)
Receivables		(93)	(45)	(64)
Receivables from affiliated companies		14	(13)	(3)
Inventory		(98)	(15)	26
Other current assets	[5]	(640)	(451)	40
Increase (decrease) in
Accounts payable		202	47	66
Accounts payable to affiliated companies		(32)	124	(46)
Taxes accrued		2	(30)	39
Other current liabilities		62	(7)	(7)
Other assets	[5]	(704)	(69)	84
Other liabilities		18	(69)	(181)
Net cash provided by (used in) operating activities		842	1,402	1,661
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures		(2,247)	(1,923)	(1,907)
Purchases of debt and equity securities		(193)	(302)	(4,443)
Proceeds from sales and maturities of debt and equity securities		279	408	4,495
Notes receivable from affiliated companies				173
Other		(108)	(136)	(103)
Net cash used in investing activities		(2,269)	(1,953)	(1,785)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from the issuance of long-term debt		1,298	1,135	495
Payments for the redemption of long-term debt		(77)	(575)	(572)
Notes payable to affiliated companies		406	3	196
Distributions to parent		(175)
Other		(1)		(1)
Net cash provided by financing activities		1,451	563	118
Net increase (decrease) in cash, cash equivalents and restricted cash		24	12	(6)
Cash, cash equivalents and restricted cash at beginning of period		62	50	56
Cash, cash equivalents and restricted cash at end of period		86	62	50
Cash, cash equivalents and restricted cash at beginning of period		23
Cash, cash equivalents and restricted cash at end of period		45	23
Supplemental Disclosures:
Cash paid for interest, net of amount capitalized		339	308	321
Cash received from income taxes		(83)	(15)	138
Significant non-cash transactions:
Accrued capital expenditures		394	337	214
Duke Energy Ohio
CASH FLOWS FROM OPERATING ACTIVITIES
Net loss attributable to Duke Energy		302	204	252
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion (including amortization of nuclear fuel)		328	311	283
Equity component of AFUDC		(7)	(7)	(7)
Impairment of assets and other charges		(10)	25
Deferred income taxes		(22)	42	31
Contributions to qualified pension plans		(3)
Payments for asset retirement obligations		(12)	(2)	(2)
Provision for rate refunds		5	16	14
(Increase) decrease in
Receivables		23	6	(13)
Receivables from affiliated companies		(5)	(25)	9
Inventory		(28)	(6)	25
Other current assets		(55)	(60)	(18)
Increase (decrease) in
Accounts payable		44	38	2
Accounts payable to affiliated companies		8	(4)
Taxes accrued		42	26	30
Other current liabilities		(63)	11	3
Other assets		(29)	(43)	(32)
Other liabilities		64	27	(2)
Net cash provided by (used in) operating activities		582	559	575
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures		(850)	(848)	(834)
Notes receivable from affiliated companies		(105)	(10)	(19)
Other		(67)	(60)	(48)
Net cash used in investing activities		(1,022)	(918)	(901)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from the issuance of long-term debt		50	150	467
Payments for the redemption of long-term debt			(50)
Notes payable to affiliated companies		395	(67)	(144)
Contribution from parent			325
Other		(2)
Net cash provided by financing activities		443	358	323
Net increase (decrease) in cash, cash equivalents and restricted cash		3	(1)	(3)
Cash, cash equivalents and restricted cash at beginning of period		13	14	17
Cash, cash equivalents and restricted cash at end of period		16	13	14
Supplemental Disclosures:
Cash paid for interest, net of amount capitalized		126	107	97
Cash received from income taxes		(35)	9
Significant non-cash transactions:
Accrued capital expenditures		123	135	104
Duke Energy Indiana
CASH FLOWS FROM OPERATING ACTIVITIES
Net loss attributable to Duke Energy		137	481	408
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion (including amortization of nuclear fuel)		648	619	572
Equity component of AFUDC		(13)	(27)	(23)
Impairment of assets and other charges		388	9
Deferred income taxes		(64)	34	29
Contributions to qualified pension plans		(5)
Payments for asset retirement obligations		(82)	(67)	(63)
(Increase) decrease in
Receivables		(3)	(33)	8
Receivables from affiliated companies		20
Inventory		(70)	55	44
Other current assets		(3)	(181)	(3)
Increase (decrease) in
Accounts payable		105	76	(12)
Accounts payable to affiliated companies		(3)	8	1
Taxes accrued		34	12	13
Other current liabilities		9	13	6
Other assets		(10)	20	(68)
Other liabilities		13	(15)	26
Net cash provided by (used in) operating activities		1,101	1,004	938
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures		(877)	(818)	(888)
Purchases of debt and equity securities		(61)	(142)	(37)
Proceeds from sales and maturities of debt and equity securities		48	65	22
Notes receivable from affiliated companies		(86)	(120)	(33)
Other		(55)	36	48
Net cash used in investing activities		(1,031)	(979)	(888)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from the issuance of long-term debt		67	300	544
Payments for the redemption of long-term debt		(84)	(70)	(513)
Notes payable to affiliated companies		435	(131)	101
Distributions to parent		(462)	(125)	(200)
Other		(1)
Net cash provided by financing activities		(45)	(26)	(68)
Net increase (decrease) in cash, cash equivalents and restricted cash		25	(1)	(18)
Cash, cash equivalents and restricted cash at beginning of period		6	7	25
Cash, cash equivalents and restricted cash at end of period		31	6	7
Supplemental Disclosures:
Cash paid for interest, net of amount capitalized		186	194	164
Cash received from income taxes		35	56	36
Significant non-cash transactions:
Accrued capital expenditures		122	118	101
Piedmont
CASH FLOWS FROM OPERATING ACTIVITIES
Net income		323	310	273
Net loss attributable to Duke Energy		323	310	273
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion (including amortization of nuclear fuel)		225	216	182
Equity in (earnings) losses of unconsolidated affiliates		(8)	(9)	(9)
Equity component of AFUDC		(11)	(20)	(19)
(Gains) Losses on sales of other assets		(4)	0	0
Impairment of assets and other charges		18	10	7
Deferred income taxes		5	4	53
Contributions to qualified pension plans		(2)
Provision for rate refunds		(3)	(4)	(33)
(Increase) decrease in
Receivables		(111)	(77)	10
Receivables from affiliated companies			(1)
Inventory		(63)	(40)	3
Other current assets		32	33	(66)
Increase (decrease) in
Accounts payable		40	(25)	16
Accounts payable to affiliated companies		11	(39)	76
Taxes accrued		11	37	3
Other current liabilities		36	(26)	(11)
Other assets		9	26	(11)
Other liabilities		(1)	(4)	7
Net cash provided by (used in) operating activities		507	391	481
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures		(862)	(850)	(901)
Contributions to equity method investments		(8)	(9)
Other		(26)	(31)	(28)
Net cash used in investing activities		(896)	(890)	(929)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from the issuance of long-term debt		394	347	394
Payments for the redemption of long-term debt			(160)
Notes payable to affiliated companies		(4)	(13)	54
Contribution from parent			325
Other		(1)
Net cash provided by financing activities		389	499	448
Supplemental Disclosures:
Cash paid for interest, net of amount capitalized		135	114	115
Cash received from income taxes		23	(13)	(36)
Significant non-cash transactions:
Accrued capital expenditures		$ 207	$ 97	$ 106

[1] Includes approximately $2.6 billion for impacts of under-collected deferred fuel regulatory assets for the year ended December 31, 2022.

[2] Includes approximately $1.3 billion for impacts of under-collected deferred fuel regulatory assets for the year ended December 31, 2022.

[3] Includes approximately $1.3 billion for impacts of under-collected deferred fuel regulatory assets for the year ended December 31, 2022.

[4] Includes approximately $402 million for impacts of under-collected deferred fuel regulatory assets for the year ended December 31, 2022.

[5] Includes approximately $942 million for impacts of under-collected deferred fuel regulatory assets for the year ended December 31, 2022.