Condensed Consolidated Statements of Cash Flows - Duke Energy Carolinas - 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)
Provision for rate refunds	(65)	(13)
(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)
Purchases of debt and equity securities	(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 Carolinas
CASH FLOWS FROM OPERATING ACTIVITIES
Net Income Attributable to Duke Energy Corporation	668	537
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion (including amortization of nuclear fuel)	892	861
Equity component of AFUDC	(47)	(30)
Impairment of assets and other charges	(9)	75
Deferred income taxes	95	(41)
Payments for asset retirement obligations	(87)	(93)
Provision for rate refunds	(36)	(11)
(Increase) decrease in
Net realized and unrealized mark-to-market and hedging transactions	55	4
Receivables	23
Receivables from affiliated companies	(51)	13
Inventory	(7)	(3)
Other current assets	(514)	(45)
Increase (decrease) in
Accounts payable	124	(266)
Accounts payable to affiliated companies	(95)	(4)
Taxes accrued	(97)	127
Other current liabilities	151	(152)
Other assets	(9)	8
Other liabilities	(33)	18
Net cash provided by operating activities	1,023	998
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(1,523)	(1,251)
Purchases of debt and equity securities	(1,073)	(1,847)
Proceeds from sales and maturities of debt and equity securities	1,073	1,847
Other	(118)	(80)
Net cash used in investing activities	(1,641)	(1,331)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from the issuance of long-term debt	1,287	1,298
Payments for the redemption of long-term debt	(382)	(614)
Notes receivable from affiliated companies	(197)	(35)
Distributions to parent	(50)	(300)
Other	(1)	(1)
Net cash provided by financing activities	657	348
Net increase in cash, cash equivalents and restricted cash	39	15
Cash, cash equivalents and restricted cash at beginning of period	8	21
Cash, cash equivalents and restricted cash at end of period	47	36
Significant non-cash transactions:
Accrued capital expenditures	$ 413	$ 315