Condensed Consolidated Statements of Cash Flows - Duke Energy Indiana - 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)
Impairment of assets and other charges	96	202
Deferred income taxes	(29)	209
Contributions to qualified pension plans	(100)	(58)
Payments for asset retirement obligations	423	418
(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)
Purchases of debt and equity securities	(2,811)	(3,619)
Proceeds from sales and maturities of debt and equity securities	2,848	3,691
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 Indiana
CASH FLOWS FROM OPERATING ACTIVITIES
Net income (loss)	379	189
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion (including amortization of nuclear fuel)	503	481
Equity component of AFUDC	(7)	(12)
Impairment of assets and other charges		211
Deferred income taxes	15	(26)
Contributions to qualified pension plans	(8)	(5)
Payments for asset retirement obligations	57	67
(Increase) decrease in
Receivables	(23)	(1)
Receivables from affiliated companies	(12)	17
Inventory	(112)	(34)
Other current assets	209	(181)
Increase (decrease) in
Accounts payable	(86)	44
Accounts payable to affiliated companies	(32)	(24)
Taxes accrued	(4)	5
Other current liabilities	107	18
Other assets	(62)	8
Other liabilities	26	9
Net cash provided by operating activities	836	632
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(699)	(643)
Purchases of debt and equity securities	(53)	(43)
Proceeds from sales and maturities of debt and equity securities	42	32
Notes receivable from affiliated companies	156	(32)
Other	(50)	(38)
Net cash used in investing activities	(604)	(724)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from the issuance of long-term debt	495	67
Payments for the redemption of long-term debt	(300)	(81)
Notes payable to affiliated companies	(234)	483
Distributions to parent	(209)	(350)
Other	(1)	(1)
Net cash provided by financing activities	(249)	118
Net (decrease) increase in cash, cash equivalents and restricted cash	(17)	26
Cash, cash equivalents and restricted cash at beginning of period	31	6
Cash, cash equivalents and restricted cash at end of period	14	32
Significant non-cash transactions:
Accrued capital expenditures	$ 94	$ 102