Condensed Consolidated Statements of Cash Flows - Duke Energy Piedmont - 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
Equity in earnings of unconsolidated affiliates	(17)	(20)
(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)
Other	(166)	(149)
Net cash used in investing activities	(3,342)	(3,209)
CASH FLOWS FROM FINANCING ACTIVITIES
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
Piedmont
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	246	232
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion (including amortization of nuclear fuel)	63	58
Equity component of AFUDC	(6)	(5)
Impairment of assets and other charges	0	1
Deferred income taxes	(15)	14
Equity in earnings of unconsolidated affiliates	(2)	(2)
(Increase) decrease in
Receivables	13	189
Receivables from affiliated companies	(2)	0
Inventory	48	73
Other current assets	20	(19)
Increase (decrease) in
Accounts payable	(43)	(107)
Accounts payable to affiliated companies	2	(12)
Taxes accrued	12	(13)
Other current liabilities	(1)	42
Other assets	(2)	(2)
Other liabilities	9	(1)
Net cash provided by operating activities	342	448
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(294)	(271)
Other	(18)	(6)
Net cash used in investing activities	(312)	(277)
CASH FLOWS FROM FINANCING ACTIVITIES
Notes payable to affiliated companies	(30)	(171)
Net cash provided by financing activities	(30)	(171)
Net increase in cash, cash equivalents and restricted cash	0	0
Cash, cash equivalents and restricted cash at beginning of period	0	0
Cash, cash equivalents and restricted cash at end of period	0	0
Significant non-cash transactions:
Accrued capital expenditures	$ 195	$ 160