Condensed Consolidated Statements of Cash Flows - Duke Energy Ohio - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
CASH FLOWS FROM OPERATING ACTIVITIES
Net Income Attributable to Duke Energy Corporation	$ 1,764	$ 1,757
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion (including amortization of nuclear fuel)	2,923	2,753
Equity component of AFUDC	(99)	(83)
Impairment of assets and other charges	206	131
Deferred income taxes	67	119
Payments for asset retirement obligations	(255)	(263)
Provision for rate refunds	(65)	(13)
(Increase) decrease in
Net realized and unrealized mark-to-market and hedging transactions	351	15
Receivables	(180)	85
Inventory	(12)	153
Other current assets	(1,144)	(297)
Increase (decrease) in
Accounts payable	408	(297)
Taxes accrued	(49)	219
Other current liabilities	99	(326)
Other assets	55	77
Other liabilities	91	(47)
Net cash provided by operating activities	4,035	3,873
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(5,117)	(4,636)
Other	(384)	(137)
Net cash used in investing activities	(5,492)	(5,614)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from the issuance of long-term debt	5,714	4,627
Other	(101)	(72)
Net cash provided by financing activities	1,576	1,750
Net increase in cash, cash equivalents and restricted cash	119	9
Cash, cash equivalents and restricted cash at beginning of period	520	556
Cash, cash equivalents and restricted cash at end of period	639	565
Significant non-cash transactions:
Accrued capital expenditures	1,264	990
Duke Energy Ohio
CASH FLOWS FROM OPERATING ACTIVITIES
Net Income Attributable to Duke Energy Corporation	133	130
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion (including amortization of nuclear fuel)	165	151
Equity component of AFUDC	(6)	(4)
Impairment of assets and other charges		5
Deferred income taxes	(41)	17
Payments for asset retirement obligations	(1)	(1)
Provision for rate refunds	5	8
(Increase) decrease in
Net realized and unrealized mark-to-market and hedging transactions		(1)
Receivables	13	2
Receivables from affiliated companies	(3)	(11)
Inventory	3	(1)
Other current assets	13	(12)
Increase (decrease) in
Accounts payable	57	(8)
Accounts payable to affiliated companies		4
Taxes accrued	(95)	(58)
Other current liabilities	(47)	(7)
Other assets	(46)	(33)
Other liabilities	72	4
Net cash provided by operating activities	222	185
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(406)	(415)
Notes receivable from affiliated companies	(37)	30
Other	(25)	(23)
Net cash used in investing activities	(468)	(408)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from the issuance of long-term debt	50
Notes receivable from affiliated companies	199	221
Other	(1)
Net cash provided by financing activities	248	221
Net increase in cash, cash equivalents and restricted cash	2	(2)
Cash, cash equivalents and restricted cash at beginning of period	13	14
Cash, cash equivalents and restricted cash at end of period	15	12
Significant non-cash transactions:
Accrued capital expenditures	$ 102	$ 88