Condensed Consolidated Statements of Cash Flows - Duke Energy Ohio - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
CASH FLOWS FROM OPERATING ACTIVITIES
Net income (loss)	$ 1,836	$ 3,186
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion (including amortization of nuclear fuel)	4,538	4,414
Equity component of AFUDC	(146)	(151)
Deferred income taxes	(29)	209
Contributions to qualified pension plans	(100)	(58)
Payments for asset retirement obligations	(423)	(418)
Provision for rate refunds	(59)	(97)
(Increase) decrease in
Receivables	481	(356)
Inventory	(531)	(290)
Other current assets	40	(2,403)
Increase (decrease) in
Accounts payable	(972)	504
Taxes accrued	277	206
Other current liabilities	(116)	263
Other assets	491	(68)
Other liabilities	368	188
Net cash provided by operating activities	7,309	5,188
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(9,310)	(8,148)
Other	(578)	(517)
Net cash used in investing activities	(9,751)	(8,630)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from the issuance of long-term debt	8,704	9,466
Payments for the redemption of long-term debt	(3,097)	(3,803)
Other	(95)	(124)
Net cash provided by financing activities	2,413	3,551
Net (decrease) increase in cash, cash equivalents and restricted cash	(29)	109
Cash, cash equivalents and restricted cash at beginning of period	603	520
Cash, cash equivalents and restricted cash at end of period	574	629
Significant non-cash transactions:
Accrued capital expenditures	1,528	1,387
Duke Energy Ohio
CASH FLOWS FROM OPERATING ACTIVITIES
Net income (loss)	251	236
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion (including amortization of nuclear fuel)	269	251
Equity component of AFUDC	(7)	(7)
Deferred income taxes	7	(13)
Contributions to qualified pension plans	(5)	(3)
Payments for asset retirement obligations	(9)	(7)
Provision for rate refunds		5
(Increase) decrease in
Receivables	(23)	8
Receivables from affiliated companies	103	11
Inventory	(24)	(2)
Other current assets	103	(60)
Increase (decrease) in
Accounts payable	(69)	(6)
Accounts payable to affiliated companies	(1)	(4)
Taxes accrued	(70)	(44)
Other current liabilities	(29)	(76)
Other assets	(39)	(54)
Other liabilities	(8)	80
Net cash provided by operating activities	449	304
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(676)	(623)
Losses on sales of other assets	75
Notes receivable from affiliated companies	(11)	(85)
Other	(53)	(47)
Net cash used in investing activities	(665)	(755)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from the issuance of long-term debt	749	50
Payments for the redemption of long-term debt	(300)
Notes payable to affiliated companies	(224)	399
Other	(5)	(2)
Net cash provided by financing activities	220	447
Net (decrease) increase in cash, cash equivalents and restricted cash	4	(4)
Cash, cash equivalents and restricted cash at beginning of period	16	13
Cash, cash equivalents and restricted cash at end of period	20	9
Significant non-cash transactions:
Accrued capital expenditures	$ 134	$ 119