Condensed Consolidated Statements of Cash Flows - Duke Energy Carolinas - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 1,151	$ 761
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion (including amortization of nuclear fuel)	1,534	1,344
Equity component of AFUDC	(55)	(46)
Impairment of assets and other charges	1	8
Deferred income taxes	149	90
Payments for asset retirement obligations	(115)	(117)
Provision for rate refunds	(4)	(33)
(Increase) decrease in
Receivables	226	754
Inventory	11	(275)
Other current assets	329	262
Increase (decrease) in
Accounts payable	(553)	(1,193)
Taxes accrued	(110)	(148)
Other current liabilities	(208)	(266)
Other assets	41	(13)
Other liabilities	149	157
Net cash provided by operating activities	2,474	1,483
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(3,208)	(3,146)
Purchases of debt and equity securities	(946)	(866)
Proceeds from sales and maturities of debt and equity securities	985	882
Other	(166)	(149)
Net cash used in investing activities	(3,342)	(3,209)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from the issuance of long-term debt	3,481	4,085
Payments for the redemption of long-term debt	(1,392)	(1,380)
Other	(67)	(84)
Net cash provided by financing activities	1,029	1,747
Net increase in cash, cash equivalents and restricted cash	161	21
Cash, cash equivalents and restricted cash at beginning of period	357	603
Cash, cash equivalents and restricted cash at end of period	518	624
Significant non-cash transactions:
Accrued capital expenditures	1,615	1,366
Duke Energy Carolinas
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	430	272
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion (including amortization of nuclear fuel)	463	426
Equity component of AFUDC	(28)	(24)
Impairment of assets and other charges	1	2
Deferred income taxes	14	32
Payments for asset retirement obligations	(36)	(39)
Provision for rate refunds	(4)	(19)
(Increase) decrease in
Receivables	14	199
Receivables from affiliated companies	30	209
Inventory	7	(139)
Other current assets	(23)	(293)
Increase (decrease) in
Accounts payable	(203)	(594)
Accounts payable to affiliated companies	35	27
Taxes accrued	(133)	(119)
Other current liabilities	(134)	(78)
Other assets	191	206
Other liabilities	(19)	76
Net cash provided by operating activities	605	144
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(952)	(866)
Purchases of debt and equity securities	(535)	(556)
Proceeds from sales and maturities of debt and equity securities	535	556
Other	(51)	(59)
Net cash used in investing activities	(1,003)	(925)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from the issuance of long-term debt	1,011	1,845
Payments for the redemption of long-term debt	(7)	(1,007)
Notes payable to affiliated companies	(612)	(79)
Other	(1)	(1)
Net cash provided by financing activities	391	758
Net increase in cash, cash equivalents and restricted cash	(7)	(23)
Cash, cash equivalents and restricted cash at beginning of period	19	53
Cash, cash equivalents and restricted cash at end of period	12	30
Significant non-cash transactions:
Accrued capital expenditures	$ 550	$ 449