Condensed Consolidated Statements of Cash Flows - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 820	$ 941
Net income	857	992
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion (including amortization of nuclear fuel)	1,480	1,385
Equity in (earnings) losses of unconsolidated affiliates	(25)	17
Equity component of AFUDC	(46)	(42)
Impairment of assets and other charges	215
Deferred income taxes	(11)	86
Payments for asset retirement obligations	(119)	(114)
Provision for rate refunds	(31)
(Increase) decrease in
Net realized and unrealized mark-to-market and hedging transactions	215
Receivables	5	377
Inventory	28	91
Other current assets	(327)	(47)
Increase (decrease) in
Accounts payable	(160)	(467)
Taxes accrued	(90)	104
Other current liabilities	(269)	(263)
Other assets	(26)	51
Other liabilities	136	(31)
Net cash provided by operating activities	1,795	2,088
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(2,551)	(2,215)
Contributions to equity method investments	(17)
Purchases of debt and equity securities	(1,516)	(1,584)
Proceeds from sales and maturities of debt and equity securities	1,530	1,601
Disbursements to canceled equity method investments		(855)
Other	(145)	(84)
Net cash used in investing activities	(2,699)	(3,137)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from the issuance of long-term debt	3,506	608
Proceeds from the issuance of common stock		5
Payments for the redemption of long-term debt	(1,215)	(76)
Proceeds from the issuance of short-term debt with original maturities greater than 90 days		50
Payments for the redemption of short-term debt with original maturities greater than 90 days	(257)	(909)
Notes payable and commercial paper	213	2,046
Contributions from noncontrolling interests	23	303
Dividends paid	(799)	(783)
Other	(67)	(59)
Net cash provided by financing activities	1,404	1,185
Net increase in cash, cash equivalents and restricted cash	500	136
Cash, cash equivalents and restricted cash at beginning of period	520	556
Cash, cash equivalents and restricted cash at end of period	1,020	692
Significant non-cash transactions:
Accrued capital expenditures	1,028	921
Duke Energy Carolinas
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	340	312
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion (including amortization of nuclear fuel)	447	428
Equity component of AFUDC	(22)	(16)
Impairment of assets and other charges	3
Deferred income taxes	44	(8)
Payments for asset retirement obligations	(35)	(35)
Provision for rate refunds	(18)
(Increase) decrease in
Net realized and unrealized mark-to-market and hedging transactions	50
Receivables	77	156
Receivables from affiliated companies	56	5
Inventory	(13)	(11)
Other current assets	(230)	(48)
Increase (decrease) in
Accounts payable	(225)	(255)
Accounts payable to affiliated companies	(17)	7
Taxes accrued	(150)	62
Other current liabilities	56	(77)
Other assets	6	43
Other liabilities	(44)	(17)
Net cash provided by operating activities	325	546
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(717)	(622)
Purchases of debt and equity securities	(1,008)	(1,128)
Proceeds from sales and maturities of debt and equity securities	1,008	1,128
Notes receivable from affiliated companies	(492)
Other	(54)	(43)
Net cash used in investing activities	(1,263)	(665)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from the issuance of long-term debt	1,217	142
Payments for the redemption of long-term debt	(1)	(33)
Notes payable to affiliated companies	(226)	2
Distributions to parent	(50)
Other	(1)	(1)
Net cash provided by financing activities	939	110
Net increase in cash, cash equivalents and restricted cash	1	(9)
Cash, cash equivalents and restricted cash at beginning of period	8	21
Cash, cash equivalents and restricted cash at end of period	9	12
Significant non-cash transactions:
Accrued capital expenditures	352	268
Progress Energy
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	354	290
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion (including amortization of nuclear fuel)	625	575
Equity component of AFUDC	(12)	(13)
Deferred income taxes	72	79
Payments for asset retirement obligations	(68)	(69)
Provision for rate refunds	(16)
(Increase) decrease in
Net realized and unrealized mark-to-market and hedging transactions	164	6
Receivables	(123)	214
Receivables from affiliated companies	102	81
Inventory	(5)	39
Other current assets	(224)	(150)
Increase (decrease) in
Accounts payable	26	(69)
Accounts payable to affiliated companies	(142)	32
Taxes accrued	30	23
Other current liabilities	(113)	(60)
Other assets	(80)	(27)
Other liabilities	40	(64)
Net cash provided by operating activities	630	887
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(981)	(796)
Purchases of debt and equity securities	(531)	(517)
Proceeds from sales and maturities of debt and equity securities	548	537
Notes receivable from affiliated companies	(237)
Other	(28)	(59)
Net cash used in investing activities	(1,229)	(835)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from the issuance of long-term debt	889	98
Payments for the redemption of long-term debt	(54)	(34)
Notes payable to affiliated companies	(1)	(125)
Dividends to parent	(250)
Other	(3)	(2)
Net cash provided by financing activities	581	(63)
Net increase in cash, cash equivalents and restricted cash	(18)	(11)
Cash, cash equivalents and restricted cash at beginning of period	113	200
Cash, cash equivalents and restricted cash at end of period	95	189
Significant non-cash transactions:
Accrued capital expenditures	349	317
Duke Energy Progress
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	215	210
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion (including amortization of nuclear fuel)	350	331
Equity component of AFUDC	(7)	(8)
Deferred income taxes	19	6
Payments for asset retirement obligations	(41)	(46)
Provision for rate refunds	(16)
(Increase) decrease in
Net realized and unrealized mark-to-market and hedging transactions	164	2
Receivables	(70)	131
Receivables from affiliated companies	63	(20)
Inventory	(19)	29
Other current assets	(75)	(21)
Increase (decrease) in
Accounts payable	18	(62)
Accounts payable to affiliated companies	(50)	10
Taxes accrued	(85)	(12)
Other current liabilities	(67)	(25)
Other assets	(56)	(35)
Other liabilities	47	(15)
Net cash provided by operating activities	390	475
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(467)	(400)
Purchases of debt and equity securities	(481)	(382)
Proceeds from sales and maturities of debt and equity securities	480	380
Notes receivable from affiliated companies	(328)
Other	(19)	(29)
Net cash used in investing activities	(815)	(431)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from the issuance of long-term debt	889	98
Payments for the redemption of long-term debt	(21)	(2)
Notes payable to affiliated companies	(172)	(132)
Distributions to parent	(250)
Other	(1)	(1)
Net cash provided by financing activities	445	(37)
Net increase in cash, cash equivalents and restricted cash	20	7
Cash, cash equivalents and restricted cash at beginning of period	39	39
Cash, cash equivalents and restricted cash at end of period	59	46
Significant non-cash transactions:
Accrued capital expenditures	111	96
Duke Energy Florida
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	171	117
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion (including amortization of nuclear fuel)	273	243
Equity component of AFUDC	(5)	(4)
Deferred income taxes	52	74
Payments for asset retirement obligations	(28)	(24)
(Increase) decrease in
Net realized and unrealized mark-to-market and hedging transactions		2
Receivables	(54)	83
Receivables from affiliated companies		(4)
Inventory	14	10
Other current assets	(72)	(101)
Increase (decrease) in
Accounts payable	9	(7)
Accounts payable to affiliated companies	(89)	23
Taxes accrued	45	3
Other current liabilities	(52)	(41)
Other assets	(24)	12
Other liabilities	(6)	(48)
Net cash provided by operating activities	234	338
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(514)	(396)
Purchases of debt and equity securities	(49)	(134)
Proceeds from sales and maturities of debt and equity securities	69	157
Other	(10)	(30)
Net cash used in investing activities	(504)	(403)
CASH FLOWS FROM FINANCING ACTIVITIES
Payments for the redemption of long-term debt	(34)	(33)
Notes payable to affiliated companies	269	83
Other	(1)
Net cash provided by financing activities	234	50
Net increase in cash, cash equivalents and restricted cash	(36)	(15)
Cash, cash equivalents and restricted cash at beginning of period	62	50
Cash, cash equivalents and restricted cash at end of period	26	35
Significant non-cash transactions:
Accrued capital expenditures	237	222
Duke Energy Ohio
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	77	91
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion (including amortization of nuclear fuel)	81	75
Equity component of AFUDC	(3)	(2)
Deferred income taxes	(51)	12
Provision for rate refunds	5
(Increase) decrease in
Receivables	(5)
Receivables from affiliated companies	15	5
Inventory	2	2
Other current assets	48	(5)
Increase (decrease) in
Accounts payable	88	8
Accounts payable to affiliated companies		(12)
Taxes accrued	(56)	(55)
Other current liabilities	(89)	(8)
Other assets	(17)	(16)
Other liabilities	74	1
Net cash provided by operating activities	169	96
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(210)	(220)
Notes receivable from affiliated companies	29	37
Other	(6)	(10)
Net cash used in investing activities	(187)	(193)
CASH FLOWS FROM FINANCING ACTIVITIES
Notes payable to affiliated companies	21	101
Other	(1)
Net cash provided by financing activities	20	101
Net increase in cash, cash equivalents and restricted cash	2	4
Cash, cash equivalents and restricted cash at beginning of period	13	14
Cash, cash equivalents and restricted cash at end of period	15	18
Significant non-cash transactions:
Accrued capital expenditures	82	84
Duke Energy Indiana
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	(79)	112
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion (including amortization of nuclear fuel)	157	153
Equity component of AFUDC	(7)	(5)
Impairment of assets and other charges	211
Deferred income taxes	(81)	(12)
Payments for asset retirement obligations	(15)	(10)
(Increase) decrease in
Net realized and unrealized mark-to-market and hedging transactions		1
Receivables	4	(9)
Receivables from affiliated companies	12
Inventory	(12)	38
Other current assets	(22)	(23)
Increase (decrease) in
Accounts payable	19	1
Accounts payable to affiliated companies	(22)	(16)
Taxes accrued	74	71
Other current liabilities	14	20
Other assets	(10)	3
Other liabilities	50	12
Net cash provided by operating activities	293	336
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(212)	(186)
Purchases of debt and equity securities	(16)	(5)
Proceeds from sales and maturities of debt and equity securities	13	4
Notes receivable from affiliated companies		(1)
Notes receivable from affiliated companies	131
Other	(17)	(7)
Net cash used in investing activities	(101)	(195)
CASH FLOWS FROM FINANCING ACTIVITIES
Payments for the redemption of long-term debt	(53)
Notes payable to affiliated companies		(131)
Distributions to parent	(125)
Other	(1)
Net cash provided by financing activities	(179)	(131)
Net increase in cash, cash equivalents and restricted cash	13	10
Cash, cash equivalents and restricted cash at beginning of period	6	7
Cash, cash equivalents and restricted cash at end of period	19	17
Significant non-cash transactions:
Accrued capital expenditures	82	74
Piedmont
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	214	203
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion (including amortization of nuclear fuel)	55	48
Equity in (earnings) losses of unconsolidated affiliates	(2)	(2)
Equity component of AFUDC	(1)	(6)
Deferred income taxes	(11)	(12)
Provision for rate refunds	(2)
(Increase) decrease in
Receivables	15	(8)
Receivables from affiliated companies	(2)
Inventory	58	31
Other current assets	7	66
Increase (decrease) in
Accounts payable	(16)	(63)
Accounts payable to affiliated companies	12	(21)
Taxes accrued	16	45
Other current liabilities	36	(16)
Other assets	(13)	2
Other liabilities		(2)
Net cash provided by operating activities	366	265
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(199)	(200)
Notes receivable from affiliated companies		(198)
Other	(8)	(8)
Net cash used in investing activities	(207)	(406)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from the issuance of long-term debt		347
Notes payable to affiliated companies	(158)	(530)
Other	(1)
Capital contributions from parent		325
Net cash provided by financing activities	(159)	142
Net increase in cash, cash equivalents and restricted cash		1
Cash, cash equivalents and restricted cash at end of period		1
Significant non-cash transactions:
Accrued capital expenditures	$ 87	$ 106