Condensed Consolidated Statements of Cash Flows - Duke Energy Ohio - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
CASH FLOWS FROM OPERATING ACTIVITIES
Net income (loss)	$ 4,614	$ 2,874	$ 2,455
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion (including amortization of nuclear fuel)	6,419	6,084	5,843
Equity component of AFUDC	(233)	(198)	(197)
Impairment of assets and other charges	38	85	434
Deferred income taxes	987	3	(200)
Equity in losses (earnings) of unconsolidated affiliates	9	(98)	(114)
Contributions to qualified pension plans	(100)	(100)	(58)
Payments for asset retirement obligations	(545)	(632)	(584)
Provision for rate refunds	(27)	(63)	(130)
(Increase) decrease in
Receivables	(23)	443	(788)
Inventory	(212)	(706)	(476)
Other current assets	885	(267)	(1,498)
Increase (decrease) in
Accounts payable	1,329	(800)	805
Taxes accrued	32	126	10
Other current liabilities	(11)	(26)	(153)
Other assets	(1,170)	914	(1,577)
Other liabilities	451	584	410
Net cash provided by operating activities	12,328	9,878	5,927
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(12,280)	(12,604)	(11,367)
Other	(1,009)	(799)	(727)
Net cash used in investing activities	(13,123)	(12,475)	(11,973)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from the issuance of long-term debt	8,956	10,028	11,874
Payments for the redemption of long-term debt	(3,357)	(4,737)	(4,396)
Other	(52)	(124)	(130)
Net cash provided by financing activities	859	2,351	6,129
Net increase (decrease) in cash, cash equivalents and restricted cash	64	(246)	83
Cash, cash equivalents and restricted cash at beginning of period	357	603	520
Cash, cash equivalents and restricted cash at end of period	421	357	603
Supplemental Disclosures:
Cash paid for interest, net of amount capitalized	3,284	2,883	2,361
Cash paid for (received from) income taxes, net (includes transferable tax credit sale proceeds of $558, $28 and $0, respectively)	(400)	1	(6)
Significant non-cash transactions:
Accrued capital expenditures	1,909	1,908	1,766
Duke Energy Ohio
CASH FLOWS FROM OPERATING ACTIVITIES
Net income (loss)	341	334	302
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion (including amortization of nuclear fuel)	408	371	328
Equity component of AFUDC	(7)	(9)	(7)
Impairment of assets and other charges	0	3	(10)
Deferred income taxes	8	113	(22)
Contributions to qualified pension plans	(5)	(5)	(3)
Payments for asset retirement obligations	(6)	(13)	(12)
Provision for rate refunds	0	0	5
(Increase) decrease in
Receivables	2	(38)	23
Receivables from affiliated companies	57	(40)	(5)
Inventory	(4)	(35)	(28)
Other current assets	78	(23)	(55)
Increase (decrease) in
Accounts payable	(10)	(34)	44
Accounts payable to affiliated companies	(19)	(1)	8
Taxes accrued	47	(1)	42
Other current liabilities	(5)	(54)	(63)
Other assets	45	(24)	(29)
Other liabilities	(25)	(38)	64
Net cash provided by operating activities	905	506	582
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(815)	(939)	(850)
Proceeds from the sales of other assets	0	75	0
Notes receivable from affiliated companies	194	(48)	105
Other	(88)	(67)	(67)
Net cash used in investing activities	(1,097)	(883)	(1,022)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from the issuance of long-term debt	644	774	50
Payments for the redemption of long-term debt	0	(500)	0
Notes payable to affiliated companies	(451)	116	395
Other	(1)	(5)	(2)
Net cash provided by financing activities	192	385	443
Net increase (decrease) in cash, cash equivalents and restricted cash	0	8	3
Cash, cash equivalents and restricted cash at beginning of period	24	16	13
Cash, cash equivalents and restricted cash at end of period	24	24	16
Supplemental Disclosures:
Cash paid for interest, net of amount capitalized	175	158	126
Cash paid for (received from) income taxes, net (includes transferable tax credit sale proceeds of $558, $28 and $0, respectively)	(79)	58	(35)
Significant non-cash transactions:
Accrued capital expenditures	$ 99	$ 115	$ 123