Condensed Consolidated Statements of Cash Flows - Duke Energy Indiana - USD ($) $ in Millions		9 Months Ended
		Sep. 30, 2022	Sep. 30, 2021
CASH FLOWS FROM OPERATING ACTIVITIES
Net Income Attributable to Duke Energy Corporation		$ 3,186	$ 3,162
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion (including amortization of nuclear fuel)		4,414	4,189
Equity component of AFUDC		(151)	(126)
Impairment of assets and other charges		202	342
Deferred income taxes		209	206
Contributions to qualified pension plans		(58)
Payments for asset retirement obligations		418	389
Provision for rate refunds		(97)	(41)
(Increase) decrease in
Net realized and unrealized mark-to-market and hedging transactions		33	116
Receivables		(356)	(167)
Inventory		(290)	268
Other current assets(a)	[1]	(2,403)	(643)
Increase (decrease) in
Accounts payable		504	(146)
Taxes accrued		206	431
Other current liabilities		263	10
Other assets		(84)	199
Other liabilities		188	77
Net cash provided by operating activities		5,188	7,227
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures		(8,148)	(7,089)
Payments to Acquire Investments		(3,619)	(4,292)
Proceeds from sales and maturities of debt and equity securities		3,691	4,335
Other		(517)	(269)
Net cash used in investing activities		(8,630)	(8,200)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from the issuance of long-term debt		9,466	6,379
Payments for the redemption of long-term debt		(3,803)	(3,696)
Other		(124)	(21)
Net cash provided by financing activities		3,551	1,160
Net increase in cash, cash equivalents and restricted cash		109	187
Cash, cash equivalents and restricted cash at beginning of period		520	556
Cash, cash equivalents and restricted cash at end of period		629	743
Significant non-cash transactions:
Accrued capital expenditures		1,387	998
Duke Energy Indiana
CASH FLOWS FROM OPERATING ACTIVITIES
Net Income Attributable to Duke Energy Corporation		189	396
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion (including amortization of nuclear fuel)		481	460
Equity component of AFUDC		(12)	(19)
Impairment of assets and other charges		211	8
Deferred income taxes		(26)	19
Contributions to qualified pension plans		(5)
Payments for asset retirement obligations		67	49
(Increase) decrease in
Receivables		(1)	(7)
Receivables from affiliated companies		17	17
Inventory		(34)	106
Other current assets(a)		(181)	(58)
Increase (decrease) in
Accounts payable		44	46
Accounts payable to affiliated companies		(24)	(15)
Taxes accrued		5	25
Other current liabilities		18	23
Other assets		8	11
Other liabilities		9	3
Net cash provided by operating activities		632	966
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures		(643)	(584)
Payments to Acquire Investments		(43)	(34)
Proceeds from sales and maturities of debt and equity securities		32	16
Notes receivable from affiliated companies		(32)	(218)
Other		(38)	(8)
Net cash used in investing activities		(724)	(828)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from the issuance of long-term debt		67
Payments for the redemption of long-term debt		(81)
Notes receivable from affiliated companies		483	(131)
Distributions to parent		(350)
Other		(1)
Net cash provided by financing activities		118	(131)
Net increase in cash, cash equivalents and restricted cash		26	7
Cash, cash equivalents and restricted cash at beginning of period		6	7
Cash, cash equivalents and restricted cash at end of period		32	14
Significant non-cash transactions:
Accrued capital expenditures		$ 102	$ 105

[1] Includes approximately $2.2 billion of under-collected deferred fuel regulatory assets for the nine months ended September 30, 2022