Condensed Consolidated Statements of Cash Flows - Duke Energy Carolinas - 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)
Gains on sales of other assets	(46)	(16)
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)
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)
Purchases of debt and equity securities	(2,811)	(3,619)
Proceeds from sales and maturities of debt and equity securities	2,848	3,691
Net proceeds from the sales of other assets	130	0
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 Carolinas
CASH FLOWS FROM OPERATING ACTIVITIES
Net income (loss)	1,121	1,292
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion (including amortization of nuclear fuel)	1,380	1,335
Equity component of AFUDC	(69)	(75)
Gains on sales of other assets	(26)
Impairment of assets and other charges	70	(3)
Deferred income taxes	(7)	230
Contributions to qualified pension plans	(26)	(15)
Payments for asset retirement obligations	(145)	(137)
Provision for rate refunds	(35)	(55)
(Increase) decrease in
Receivables	(4)	(17)
Receivables from affiliated companies	225	(107)
Inventory	(257)	(86)
Other current assets	(439)	(1,139)
Increase (decrease) in
Accounts payable	(523)	104
Accounts payable to affiliated companies	12	(88)
Taxes accrued	121	(9)
Other current liabilities	(48)	279
Other assets	526	22
Other liabilities	105	(269)
Net cash provided by operating activities	1,981	1,262
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(2,646)	(2,313)
Purchases of debt and equity securities	(1,594)	(2,083)
Proceeds from sales and maturities of debt and equity securities	1,594	2,083
Net proceeds from the sales of other assets	30
Other	(215)	(185)
Net cash used in investing activities	(2,831)	(2,498)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from the issuance of long-term debt	2,764	1,352
Payments for the redemption of long-term debt	(1,040)	(389)
Notes payable to affiliated companies	(902)	358
Distributions to parent		(50)
Other	(1)	(1)
Net cash provided by financing activities	821	1,270
Net (decrease) increase in cash, cash equivalents and restricted cash	(29)	34
Cash, cash equivalents and restricted cash at beginning of period	53	8
Cash, cash equivalents and restricted cash at end of period	24	42
Significant non-cash transactions:
Accrued capital expenditures	$ 534	$ 460