Consolidated Statements of Cash Flows - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2023	Mar. 31, 2022
CASH FLOWS FROM OPERATING ACTIVITIES
Net income		$ 761	$ 820
Net loss attributable to Duke Energy		804	857
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion (including amortization of nuclear fuel)		1,344	1,480
Equity component of AFUDC		(46)	(46)
Deferred income taxes		90	(11)
Impairment of assets and other charges		8	215
Impairment of assets and other charges		228	215
Equity in earnings of unconsolidated affiliates		(20)	(25)
Payments for asset retirement obligations		(117)	(119)
Provision for rate refunds		(33)	(31)
(Increase) decrease in
Net realized and unrealized mark-to-market and hedging transactions		5	215
Receivables		754	5
Inventory		(275)	28
Other current liabilities		(266)	(269)
Other current assets(a)	[1]	262	(327)
Increase (decrease) in
Accounts payable		(1,193)	(160)
Taxes accrued		(148)	(90)
Other assets	[1]	(20)	(26)
Other liabilities		157	136
Net cash provided by (used in) operating activities		1,483	1,795
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures		(3,146)	(2,551)
Contributions to equity method investments		(6)	(17)
Purchases of debt and equity securities		(866)	(1,516)
Proceeds from sales and maturities of debt and equity securities		882	1,530
Net proceeds from the sales of other assets		76	0
Other		(149)	(145)
Net cash used in investing activities		(3,209)	(2,699)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from the issuance of long-term debt		4,085	3,506
Payments for the redemption of long-term debt		(1,380)	(1,215)
Proceeds from the issuance of short-term debt with original maturities greater than 90 days		2
Payments for the redemption of short-term debt with original maturities greater than 90 days		(50)	(257)
Notes payable and commercial paper		(217)	213
Contributions from noncontrolling interests		206	23
Dividends paid		(815)	(799)
Other		(84)	(67)
Net cash provided by financing activities		1,747	1,404
Net increase (decrease) in cash, cash equivalents and restricted cash		21	500
Cash, cash equivalents and restricted cash at beginning of period		603	520
Cash, cash equivalents and restricted cash at end of period		624	1,020
Cash, cash equivalents and restricted cash at beginning of period		409
Significant non-cash transactions:
Accrued capital expenditures		1,366	1,028
Duke Energy Carolinas
CASH FLOWS FROM OPERATING ACTIVITIES
Net loss attributable to Duke Energy		272	340
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion (including amortization of nuclear fuel)		426	447
Equity component of AFUDC		(24)	(22)
Deferred income taxes		32	44
Impairment of assets and other charges		2	3
Payments for asset retirement obligations		(39)	(35)
Provision for rate refunds		(19)	(18)
(Increase) decrease in
Net realized and unrealized mark-to-market and hedging transactions			50
Receivables		199	77
Receivables from affiliated companies		209	56
Inventory		(139)	(13)
Other current liabilities		(78)	56
Other current assets(a)	[2]	(293)	(230)
Increase (decrease) in
Accounts payable		(594)	(225)
Accounts payable to affiliated companies		27	(17)
Taxes accrued		(119)	(150)
Other assets	[2]	206	6
Other liabilities		76	(44)
Net cash provided by (used in) operating activities		144	325
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures		(866)	(717)
Purchases of debt and equity securities		(556)	(1,008)
Proceeds from sales and maturities of debt and equity securities		556	1,008
Notes receivable from affiliated companies			(492)
Other		(59)	(54)
Net cash used in investing activities		(925)	(1,263)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from the issuance of long-term debt		1,845	1,217
Payments for the redemption of long-term debt		(1,007)	(1)
Notes payable to affiliated companies		(79)	(226)
Distributions to parent			(50)
Other		(1)	(1)
Net cash provided by financing activities		758	939
Net increase (decrease) in cash, cash equivalents and restricted cash		(23)	1
Cash, cash equivalents and restricted cash at beginning of period		53	8
Cash, cash equivalents and restricted cash at end of period		30	9
Cash, cash equivalents and restricted cash at beginning of period		44
Cash, cash equivalents and restricted cash at end of period		24
Significant non-cash transactions:
Accrued capital expenditures		449	352
Progress Energy
CASH FLOWS FROM OPERATING ACTIVITIES
Net income		359	354
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion (including amortization of nuclear fuel)		554	625
Equity component of AFUDC		(16)	(12)
Deferred income taxes		51	72
Impairment of assets and other charges		5
Payments for asset retirement obligations		(58)	(68)
Provision for rate refunds		(14)	(16)
(Increase) decrease in
Net realized and unrealized mark-to-market and hedging transactions			164
Receivables		188	(123)
Receivables from affiliated companies		(2)	102
Inventory		(133)	(5)
Other current liabilities		(107)	(113)
Other current assets(a)	[3]	319	(224)
Increase (decrease) in
Accounts payable		(214)	26
Accounts payable to affiliated companies		(302)	(142)
Taxes accrued		36	30
Other assets	[3]	(212)	(80)
Other liabilities		4	40
Net cash provided by (used in) operating activities		458	630
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures		(1,275)	(981)
Purchases of debt and equity securities		(279)	(531)
Proceeds from sales and maturities of debt and equity securities		304	548
Notes receivable from affiliated companies		(118)	(237)
Other		(71)	(28)
Net cash used in investing activities		(1,439)	(1,229)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from the issuance of long-term debt		996	889
Payments for the redemption of long-term debt		(66)	(54)
Notes payable to affiliated companies		2	(1)
Dividends to parent			(250)
Other		(1)	(3)
Net cash provided by financing activities		931	581
Net increase (decrease) in cash, cash equivalents and restricted cash		(50)	(18)
Cash, cash equivalents and restricted cash at beginning of period		184	113
Cash, cash equivalents and restricted cash at end of period		134	95
Cash, cash equivalents and restricted cash at beginning of period		108
Cash, cash equivalents and restricted cash at end of period		93
Significant non-cash transactions:
Accrued capital expenditures		516	349
Duke Energy Progress
CASH FLOWS FROM OPERATING ACTIVITIES
Net loss attributable to Duke Energy		169	215
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion (including amortization of nuclear fuel)		360	350
Equity component of AFUDC		(13)	(7)
Deferred income taxes		27	19
Impairment of assets and other charges		4
Payments for asset retirement obligations		(46)	(41)
Provision for rate refunds		(14)	(16)
(Increase) decrease in
Net realized and unrealized mark-to-market and hedging transactions			164
Receivables		144	(70)
Receivables from affiliated companies		(1)	63
Inventory		(76)	(19)
Other current liabilities		(86)	(67)
Other current assets(a)		(61)	(75)
Increase (decrease) in
Accounts payable		(3)	18
Accounts payable to affiliated companies		(256)	(50)
Taxes accrued		(21)	(85)
Other assets		(16)	(56)
Other liabilities		21	47
Net cash provided by (used in) operating activities		132	390
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures		(666)	(467)
Purchases of debt and equity securities		(239)	(481)
Proceeds from sales and maturities of debt and equity securities		236	480
Notes receivable from affiliated companies		(160)	(328)
Other		(33)	(19)
Net cash used in investing activities		(862)	(815)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from the issuance of long-term debt		991	889
Payments for the redemption of long-term debt		(32)	(21)
Notes payable to affiliated companies		(239)	(172)
Distributions to parent		0	(250)
Other		(1)	(1)
Net cash provided by financing activities		719	445
Net increase (decrease) in cash, cash equivalents and restricted cash		(11)	20
Cash, cash equivalents and restricted cash at beginning of period		79	39
Cash, cash equivalents and restricted cash at end of period		68	59
Cash, cash equivalents and restricted cash at beginning of period		49
Cash, cash equivalents and restricted cash at end of period		50
Significant non-cash transactions:
Accrued capital expenditures		176	111
Duke Energy Florida
CASH FLOWS FROM OPERATING ACTIVITIES
Net loss attributable to Duke Energy		205	171
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion (including amortization of nuclear fuel)		194	273
Equity component of AFUDC		(3)	(5)
Deferred income taxes		21	52
Impairment of assets and other charges		1
Payments for asset retirement obligations		(12)	(28)
(Increase) decrease in
Receivables		42	(54)
Receivables from affiliated companies		(1)
Inventory		(57)	14
Other current liabilities		(27)	(52)
Other current assets(a)	[3]	363	(72)
Increase (decrease) in
Accounts payable		(211)	9
Accounts payable to affiliated companies		(67)	(89)
Taxes accrued		79	45
Other assets	[3]	(193)	(24)
Other liabilities		(8)	(6)
Net cash provided by (used in) operating activities		326	234
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures		(609)	(514)
Purchases of debt and equity securities		(40)	(49)
Proceeds from sales and maturities of debt and equity securities		68	69
Other		(38)	(10)
Net cash used in investing activities		(619)	(504)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from the issuance of long-term debt		5
Payments for the redemption of long-term debt		(34)	(34)
Notes payable to affiliated companies		281	269
Other		(1)	(1)
Net cash provided by financing activities		251	234
Net increase (decrease) in cash, cash equivalents and restricted cash		(42)	(36)
Cash, cash equivalents and restricted cash at beginning of period		86	62
Cash, cash equivalents and restricted cash at end of period		44	26
Cash, cash equivalents and restricted cash at beginning of period		45
Cash, cash equivalents and restricted cash at end of period		26
Significant non-cash transactions:
Accrued capital expenditures		340	237
Duke Energy Ohio
CASH FLOWS FROM OPERATING ACTIVITIES
Net loss attributable to Duke Energy		100	77
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion (including amortization of nuclear fuel)		91	81
Equity component of AFUDC			(3)
Deferred income taxes		(3)	(51)
Payments for asset retirement obligations		(1)
Provision for rate refunds			5
(Increase) decrease in
Receivables			(5)
Receivables from affiliated companies		17	15
Inventory		(11)	2
Other current liabilities		(42)	(89)
Other current assets(a)		94	48
Increase (decrease) in
Accounts payable		(60)	88
Accounts payable to affiliated companies		(7)
Taxes accrued		(90)	(56)
Other assets		1	(17)
Other liabilities		(1)	74
Net cash provided by (used in) operating activities		88	169
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures		(232)	(210)
Losses on sales of other assets		75
Notes receivable from affiliated companies		(224)	29
Other		(16)	(6)
Net cash used in investing activities		(397)	(187)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from the issuance of long-term debt		749
Notes payable to affiliated companies		(425)	21
Other		(5)	(1)
Net cash provided by financing activities		319	20
Net increase (decrease) in cash, cash equivalents and restricted cash		10	2
Cash, cash equivalents and restricted cash at beginning of period		16	13
Cash, cash equivalents and restricted cash at end of period		26	15
Cash, cash equivalents and restricted cash at beginning of period		16
Cash, cash equivalents and restricted cash at end of period		26
Significant non-cash transactions:
Accrued capital expenditures		87	82
Duke Energy Indiana
CASH FLOWS FROM OPERATING ACTIVITIES
Net loss attributable to Duke Energy		106	(79)
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion (including amortization of nuclear fuel)		158	157
Equity component of AFUDC		(1)	(7)
Deferred income taxes		2	(81)
Impairment of assets and other charges			211
Payments for asset retirement obligations		(19)	(15)
(Increase) decrease in
Receivables		20	4
Receivables from affiliated companies		(26)	12
Inventory		(71)	(12)
Other current liabilities		112	14
Other current assets(a)	[4]	174	(22)
Increase (decrease) in
Accounts payable		(107)	19
Accounts payable to affiliated companies		(33)	(22)
Taxes accrued		14	74
Other assets	[4]	(12)	(10)
Other liabilities		35	50
Net cash provided by (used in) operating activities		352	293
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures		(226)	(212)
Purchases of debt and equity securities		(23)	(16)
Proceeds from sales and maturities of debt and equity securities		16	13
Notes receivable from affiliated companies		96	131
Other		(10)	(17)
Net cash used in investing activities		(147)	(101)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from the issuance of long-term debt		495
Payments for the redemption of long-term debt		(300)	(53)
Notes payable to affiliated companies		(231)
Distributions to parent		(188)	(125)
Other		(1)	(1)
Net cash provided by financing activities		(225)	(179)
Net increase (decrease) in cash, cash equivalents and restricted cash		(20)	13
Cash, cash equivalents and restricted cash at beginning of period		31	6
Cash, cash equivalents and restricted cash at end of period		11	19
Cash, cash equivalents and restricted cash at beginning of period		31
Cash, cash equivalents and restricted cash at end of period		11
Significant non-cash transactions:
Accrued capital expenditures		85	82
Piedmont
CASH FLOWS FROM OPERATING ACTIVITIES
Net income		232	214
Net loss attributable to Duke Energy		232	214
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion (including amortization of nuclear fuel)		58	55
Equity component of AFUDC		(5)	(1)
Deferred income taxes		14	(11)
Impairment of assets and other charges		1
Equity in earnings of unconsolidated affiliates		(2)	(2)
Provision for rate refunds		0	(2)
(Increase) decrease in
Receivables		189	15
Receivables from affiliated companies			(2)
Inventory		73	58
Other current liabilities		42	36
Other current assets(a)		(19)	7
Increase (decrease) in
Accounts payable		(107)	(16)
Accounts payable to affiliated companies		(12)	12
Taxes accrued		(13)	16
Other assets		(2)	(13)
Other liabilities		(1)
Net cash provided by (used in) operating activities		448	366
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures		(271)	(199)
Other		(6)	(8)
Net cash used in investing activities		(277)	(207)
CASH FLOWS FROM FINANCING ACTIVITIES
Notes payable to affiliated companies		(171)	(158)
Other		0	(1)
Net cash provided by financing activities		(171)	(159)
Significant non-cash transactions:
Accrued capital expenditures		$ 160	$ 87

[1] Includes approximately $346 million of net collections of deferred fuel regulatory assets for the three months ended March 31, 2023.

[2] Includes approximately $14 million of under-collected deferred fuel regulatory assets for the three months ended March 31, 2023

[3] Includes approximately $162 million of net collections of deferred fuel regulatory assets for the three months ended March 31, 2023.

[4] Includes approximately $175 million of net collections of deferred fuel regulatory assets for the three months ended March 31, 2023.