Consolidated Statements of Cash Flows - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 557	$ 1,700
Net income (loss) attributable to Duke Energy	584	1,764
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion (including amortization of nuclear fuel)	2,916	2,923
Equity component of AFUDC	(97)	(99)
(Gains) Losses on sales of other assets	(38)	(10)
Impairment of assets and other charges	1,442	206
Deferred income taxes	(52)	67
Impairment of assets and other charges	8	206
Equity in earnings of unconsolidated affiliates	(29)	(61)
Payments for asset retirement obligations	(261)	(255)
Provision for rate refunds	(57)	(65)
(Increase) decrease in
Net realized and unrealized mark-to-market and hedging transactions	93	351
Receivables	586	(180)
Inventory	(517)	(12)
Other current liabilities	(154)	99
Other current assets	(41)	(1,144)
Increase (decrease) in
Accounts payable	(1,245)	408
Taxes accrued	(8)	(49)
Other assets	608	65
Other liabilities	82	91
Net cash provided by (used in) operating activities	3,785	4,035
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(6,265)	(5,117)
Contributions to equity method investments	(22)	(32)
Purchases of debt and equity securities	(1,594)	(2,184)
Proceeds from sales and maturities of debt and equity securities	1,628	2,225
Net proceeds from the sales of other assets	111	0
Other	(366)	(384)
Net cash used in investing activities	(6,508)	(5,492)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from the issuance of long-term debt	7,094	5,714
Payments for the redemption of long-term debt	(2,372)	(3,147)
Proceeds from the issuance of short-term debt with original maturities greater than 90 days	60	30
Payments for the redemption of short-term debt with original maturities greater than 90 days	(52)	(257)
Notes payable and commercial paper	(590)	785
Contributions from noncontrolling interests	248	126
Dividends paid	(1,606)	(1,574)
Other	(95)	(101)
Net cash provided by financing activities	2,687	1,576
Net increase (decrease) in cash, cash equivalents and restricted cash	(36)	119
Cash, cash equivalents and restricted cash at beginning of period	603	520
Cash, cash equivalents and restricted cash at end of period	567	639
Cash, cash equivalents and restricted cash at beginning of period	409
Significant non-cash transactions:
Accrued capital expenditures	1,398	1,264
Duke Energy Carolinas
CASH FLOWS FROM OPERATING ACTIVITIES
Net income (loss) attributable to Duke Energy	542	668
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion (including amortization of nuclear fuel)	906	892
Equity component of AFUDC	(48)	(47)
(Gains) Losses on sales of other assets	(26)
Deferred income taxes	(5)	95
Impairment of assets and other charges	6	(9)
Payments for asset retirement obligations	(87)	(87)
Provision for rate refunds	(33)	(36)
(Increase) decrease in
Net realized and unrealized mark-to-market and hedging transactions		55
Receivables	91	23
Receivables from affiliated companies	234	(51)
Inventory	(239)	(7)
Other current liabilities	6	151
Other current assets	(482)	(514)
Increase (decrease) in
Accounts payable	(652)	124
Accounts payable to affiliated companies	(70)	(95)
Taxes accrued	48	(97)
Other assets	542	(9)
Other liabilities	97	(33)
Net cash provided by (used in) operating activities	830	1,023
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(1,795)	(1,523)
Purchases of debt and equity securities	(936)	(1,073)
Proceeds from sales and maturities of debt and equity securities	936	1,073
Net proceeds from the sales of other assets	30
Other	(129)	(118)
Net cash used in investing activities	(1,894)	(1,641)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from the issuance of long-term debt	2,729	1,287
Payments for the redemption of long-term debt	(1,033)	(382)
Notes payable to affiliated companies	(655)	(197)
Distributions to parent		(50)
Other	(1)	(1)
Net cash provided by financing activities	1,040	657
Net increase (decrease) in cash, cash equivalents and restricted cash	(24)	39
Cash, cash equivalents and restricted cash at beginning of period	53	8
Cash, cash equivalents and restricted cash at end of period	29	47
Cash, cash equivalents and restricted cash at beginning of period	44
Cash, cash equivalents and restricted cash at end of period	20
Significant non-cash transactions:
Accrued capital expenditures	456	413
Progress Energy
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	744	813
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion (including amortization of nuclear fuel)	1,265	1,209
Equity component of AFUDC	(33)	(33)
Deferred income taxes	27	95
Impairment of assets and other charges	5	4
Payments for asset retirement obligations	(131)	(137)
Provision for rate refunds	(24)	(30)
(Increase) decrease in
Net realized and unrealized mark-to-market and hedging transactions		314
Receivables	6	(246)
Receivables from affiliated companies	(1)	117
Inventory	(238)	(30)
Other current liabilities	(62)	74
Other current assets	332	(417)
Increase (decrease) in
Accounts payable	(293)	161
Accounts payable to affiliated companies	(274)	459
Taxes accrued	153	93
Other assets	85	(76)
Other liabilities	14	(2)
Net cash provided by (used in) operating activities	1,575	2,368
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(2,425)	(1,944)
Purchases of debt and equity securities	(574)	(996)
Proceeds from sales and maturities of debt and equity securities	608	1,032
Notes receivable from affiliated companies	(25)	(108)
Other	(163)	(21)
Net cash used in investing activities	(2,579)	(2,037)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from the issuance of long-term debt	1,073	940
Payments for the redemption of long-term debt	(79)	(1,019)
Notes payable to affiliated companies	(27)	80
Dividends to parent		(250)
Other	(1)	(3)
Net cash provided by financing activities	966	(252)
Net increase (decrease) in cash, cash equivalents and restricted cash	(38)	79
Cash, cash equivalents and restricted cash at beginning of period	184	113
Cash, cash equivalents and restricted cash at end of period	146	192
Cash, cash equivalents and restricted cash at beginning of period	108
Cash, cash equivalents and restricted cash at end of period	77
Significant non-cash transactions:
Accrued capital expenditures	544	455
Duke Energy Progress
CASH FLOWS FROM OPERATING ACTIVITIES
Net income (loss) attributable to Duke Energy	309	434
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion (including amortization of nuclear fuel)	708	672
Equity component of AFUDC	(27)	(22)
Deferred income taxes	32	32
Impairment of assets and other charges	7	4
Payments for asset retirement obligations	(106)	(90)
Provision for rate refunds	(24)	(30)
(Increase) decrease in
Net realized and unrealized mark-to-market and hedging transactions		314
Receivables	108	(25)
Receivables from affiliated companies	(5)	63
Inventory	(158)	(27)
Other current liabilities	(21)	(9)
Other current assets	(146)	(83)
Increase (decrease) in
Accounts payable	(33)	(7)
Accounts payable to affiliated companies	(258)	32
Taxes accrued	44	(49)
Other assets	107	(75)
Other liabilities	37	9
Net cash provided by (used in) operating activities	574	1,143
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(1,193)	(926)
Purchases of debt and equity securities	(490)	(887)
Proceeds from sales and maturities of debt and equity securities	486	882
Notes receivable from affiliated companies	(37)	(154)
Other	(81)	22
Net cash used in investing activities	(1,315)	(1,063)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from the issuance of long-term debt	991	939
Payments for the redemption of long-term debt	(39)	(530)
Notes payable to affiliated companies	(239)	(172)
Distributions to parent	0	(250)
Other	(1)	(1)
Net cash provided by financing activities	712	(14)
Net increase (decrease) in cash, cash equivalents and restricted cash	(29)	66
Cash, cash equivalents and restricted cash at beginning of period	79	39
Cash, cash equivalents and restricted cash at end of period	50	105
Cash, cash equivalents and restricted cash at beginning of period	49
Cash, cash equivalents and restricted cash at end of period	21
Significant non-cash transactions:
Accrued capital expenditures	198	158
Duke Energy Florida
CASH FLOWS FROM OPERATING ACTIVITIES
Net income (loss) attributable to Duke Energy	463	432
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion (including amortization of nuclear fuel)	556	535
Equity component of AFUDC	(6)	(10)
Deferred income taxes	(16)	66
Impairment of assets and other charges	(1)
Payments for asset retirement obligations	(25)	(47)
(Increase) decrease in
Receivables	(103)	(222)
Receivables from affiliated companies	(3)	11
Inventory	(80)	(4)
Other current liabilities	(41)	87
Other current assets	403	(307)
Increase (decrease) in
Accounts payable	(261)	168
Accounts payable to affiliated companies	(65)	(62)
Taxes accrued	208	134
Other assets	(23)	(3)
Other liabilities	(9)	(11)
Net cash provided by (used in) operating activities	997	767
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(1,232)	(1,018)
Purchases of debt and equity securities	(83)	(109)
Proceeds from sales and maturities of debt and equity securities	121	151
Other	(81)	(43)
Net cash used in investing activities	(1,275)	(1,019)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from the issuance of long-term debt	82
Payments for the redemption of long-term debt	(40)	(39)
Notes payable to affiliated companies	224	306
Other	(1)
Net cash provided by financing activities	265	267
Net increase (decrease) in cash, cash equivalents and restricted cash	(13)	15
Cash, cash equivalents and restricted cash at beginning of period	86	62
Cash, cash equivalents and restricted cash at end of period	73	77
Cash, cash equivalents and restricted cash at beginning of period	45
Cash, cash equivalents and restricted cash at end of period	37
Significant non-cash transactions:
Accrued capital expenditures	346	297
Duke Energy Ohio
CASH FLOWS FROM OPERATING ACTIVITIES
Net income (loss) attributable to Duke Energy	171	133
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion (including amortization of nuclear fuel)	178	165
Equity component of AFUDC	(3)	(6)
Deferred income taxes	12	(41)
Payments for asset retirement obligations	(5)	(1)
Provision for rate refunds		5
(Increase) decrease in
Receivables	(14)	13
Receivables from affiliated companies		(3)
Inventory	(33)	3
Other current liabilities	(48)	(47)
Other current assets	105	13
Increase (decrease) in
Accounts payable	(30)	57
Accounts payable to affiliated companies	(12)
Taxes accrued	(135)	(95)
Other assets	(19)	(46)
Other liabilities	(44)	72
Net cash provided by (used in) operating activities	123	222
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(435)	(406)
Losses on sales of other assets	75
Notes receivable from affiliated companies	(93)	(37)
Other	(34)	(25)
Net cash used in investing activities	(487)	(468)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from the issuance of long-term debt	749	50
Notes payable to affiliated companies	(388)	199
Other	(5)	(1)
Net cash provided by financing activities	356	248
Net increase (decrease) in cash, cash equivalents and restricted cash	(8)	2
Cash, cash equivalents and restricted cash at beginning of period	16	13
Cash, cash equivalents and restricted cash at end of period	8	15
Cash, cash equivalents and restricted cash at beginning of period	16
Cash, cash equivalents and restricted cash at end of period	8
Significant non-cash transactions:
Accrued capital expenditures	120	102
Duke Energy Indiana
CASH FLOWS FROM OPERATING ACTIVITIES
Net income (loss) attributable to Duke Energy	220	70
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion (including amortization of nuclear fuel)	328	312
Equity component of AFUDC	(3)	(10)
Impairment of assets and other charges		212
Deferred income taxes		(80)
Impairment of assets and other charges		211
Payments for asset retirement obligations	(38)	(31)
(Increase) decrease in
Net realized and unrealized mark-to-market and hedging transactions		(53)
Receivables	(81)	21
Receivables from affiliated companies		2
Inventory	(104)	(23)
Other current liabilities	124	52
Other current assets	185	(166)
Increase (decrease) in
Accounts payable	(94)	59
Accounts payable to affiliated companies	(17)	7
Taxes accrued	(12)	19
Other assets	(26)	(20)
Other liabilities	78	50
Net cash provided by (used in) operating activities	560	421
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(450)	(433)
Purchases of debt and equity securities	(44)	(26)
Proceeds from sales and maturities of debt and equity securities	38	21
Notes receivable from affiliated companies	134	9
Other	(39)	(23)
Net cash used in investing activities	(361)	(452)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from the issuance of long-term debt	495	67
Payments for the redemption of long-term debt	(300)	(53)
Notes payable to affiliated companies	(225)	275
Distributions to parent	(188)	(237)
Other	(1)	(1)
Net cash provided by financing activities	(219)	51
Net increase (decrease) in cash, cash equivalents and restricted cash	(20)	20
Cash, cash equivalents and restricted cash at beginning of period	31	6
Cash, cash equivalents and restricted cash at end of period	11	26
Cash, cash equivalents and restricted cash at beginning of period	31
Cash, cash equivalents and restricted cash at end of period	11
Significant non-cash transactions:
Accrued capital expenditures	116	94
Piedmont
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	235	213
Net income (loss) attributable to Duke Energy	235	213
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion (including amortization of nuclear fuel)	117	111
Equity component of AFUDC	(10)	(4)
Impairment of assets and other charges	4
Deferred income taxes	33	(4)
Impairment of assets and other charges	(4)
Equity in earnings of unconsolidated affiliates	(4)	(4)
Provision for rate refunds	0	(3)
(Increase) decrease in
Receivables	317	168
Receivables from affiliated companies	(2)
Inventory	98	40
Other current liabilities	27	44
Other current assets	(57)	(63)
Increase (decrease) in
Accounts payable	(84)	31
Accounts payable to affiliated companies	(7)	4
Taxes accrued	(44)	(32)
Other assets	(7)	(6)
Other liabilities	4	(1)
Net cash provided by (used in) operating activities	612	494
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(535)	(385)
Contributions to equity method investments		(8)
Other	(15)	(9)
Net cash used in investing activities	(550)	(402)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from the issuance of long-term debt	348	394
Notes payable to affiliated companies	(410)	(485)
Other	0	(1)
Net cash provided by financing activities	(62)	(92)
Significant non-cash transactions:
Accrued capital expenditures	$ 126	$ 124