Condensed Consolidated Statements of Cash Flows - Duke Energy Progress - 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 Progress
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	272	169
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion (including amortization of nuclear fuel)	385	360
Equity component of AFUDC	(13)	(13)
Impairment of assets and other charges	0	4
Deferred income taxes	(21)	27
Payments for asset retirement obligations	(46)	(46)
Provision for rate refunds	0	(14)
(Increase) decrease in
Receivables	50	144
Receivables from affiliated companies	13	(1)
Inventory	(67)	(76)
Other current assets	97	(61)
Increase (decrease) in
Accounts payable	(31)	(3)
Accounts payable to affiliated companies	(38)	(256)
Taxes accrued	(47)	(21)
Other current liabilities	(49)	(86)
Other assets	(105)	(16)
Other liabilities	(11)	21
Net cash provided by operating activities	389	132
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(704)	(666)
Purchases of debt and equity securities	(351)	(239)
Proceeds from sales and maturities of debt and equity securities	351	236
Notes receivable from affiliated companies	0	(160)
Other	(12)	(33)
Net cash used in investing activities	(716)	(862)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from the issuance of long-term debt	495	991
Payments for the redemption of long-term debt	(33)	(32)
Notes payable to affiliated companies	(137)	(239)
Other	0	(1)
Net cash provided by financing activities	325	719
Net increase in cash, cash equivalents and restricted cash	(2)	(11)
Cash, cash equivalents and restricted cash at beginning of period	51	79
Cash, cash equivalents and restricted cash at end of period	49	68
Significant non-cash transactions:
Accrued capital expenditures	$ 259	$ 176