Condensed Consolidated Statements of Cash Flows - Duke Energy Progress - 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 Progress
CASH FLOWS FROM OPERATING ACTIVITIES
Net Income Attributable to Duke Energy Corporation	434	425
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion (including amortization of nuclear fuel)	672	610
Equity component of AFUDC	(22)	(15)
Impairment of assets and other charges	4	18
Deferred income taxes	32	28
Payments for asset retirement obligations	(90)	(88)
Provision for rate refunds	(30)	(7)
(Increase) decrease in
Net realized and unrealized mark-to-market and hedging transactions	314	9
Receivables	(25)	31
Receivables from affiliated companies	63	(13)
Inventory	(27)	52
Other current assets	(83)	(52)
Increase (decrease) in
Accounts payable	(7)	28
Accounts payable to affiliated companies	32	(1)
Taxes accrued	(49)	2
Other current liabilities	(9)	(45)
Other assets	(75)	(40)
Other liabilities	9	(43)
Net cash provided by operating activities	1,143	899
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(926)	(869)
Purchases of debt and equity securities	(887)	(926)
Proceeds from sales and maturities of debt and equity securities	882	915
Notes receivable from affiliated companies	(154)
Other	22	(2)
Net cash used in investing activities	(1,063)	(882)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from the issuance of long-term debt	939	19
Payments for the redemption of long-term debt	(530)	(3)
Notes receivable from affiliated companies	(172)	(25)
Distributions to parent	(250)
Other	(1)	(1)
Net cash provided by financing activities	(14)	(10)
Net increase in cash, cash equivalents and restricted cash	66	7
Cash, cash equivalents and restricted cash at beginning of period	39	39
Cash, cash equivalents and restricted cash at end of period	105	46
Significant non-cash transactions:
Accrued capital expenditures	$ 158	$ 97