Condensed Consolidated Statements of Cash Flows - Duke Energy Indiana - 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)
(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)
Payments to Acquire Investments	(2,184)	(3,182)
Proceeds from sales and maturities of debt and equity securities	2,225	3,217
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
Payments for the redemption of long-term debt	(3,147)	(2,002)
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 Indiana
CASH FLOWS FROM OPERATING ACTIVITIES
Net Income Attributable to Duke Energy Corporation	70	215
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion (including amortization of nuclear fuel)	312	306
Equity component of AFUDC	(10)	(12)
Impairment of assets and other charges	212	8
Deferred income taxes	(80)	1
Payments for asset retirement obligations	(31)	(30)
(Increase) decrease in
Net realized and unrealized mark-to-market and hedging transactions	(53)
Receivables	21	(15)
Receivables from affiliated companies	2	(8)
Inventory	(23)	61
Other current assets	(166)	(31)
Increase (decrease) in
Accounts payable	59	35
Accounts payable to affiliated companies	7	(29)
Taxes accrued	19	10
Other current liabilities	52	20
Other assets	(20)	(3)
Other liabilities	50	6
Net cash provided by operating activities	421	534
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(433)	(394)
Payments to Acquire Investments	(26)	(9)
Proceeds from sales and maturities of debt and equity securities	21	6
Notes receivable from affiliated companies	9	7
Other	(23)	(8)
Net cash used in investing activities	(452)	(398)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from the issuance of long-term debt	67
Payments for the redemption of long-term debt	(53)
Notes receivable from affiliated companies	275	(131)
Distributions to parent	(237)
Other	(1)
Net cash provided by financing activities	51	(131)
Net increase in cash, cash equivalents and restricted cash	20	5
Cash, cash equivalents and restricted cash at beginning of period	6	7
Cash, cash equivalents and restricted cash at end of period	26	12
Significant non-cash transactions:
Accrued capital expenditures	$ 94	$ 85