Condensed Consolidated Statements of Cash Flows - Duke Energy Florida - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
CASH FLOWS FROM OPERATING ACTIVITIES
Net income (loss)	$ 2,841	$ 2,550	$ 3,908
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion (including amortization of nuclear fuel)	6,084	5,843	5,663
Equity component of AFUDC	(198)	(197)	(171)
Impairment of assets and other charges	85	434	353
Deferred income taxes	3	(200)	191
Contributions to qualified pension plans	(100)	(58)
Payments for asset retirement obligations	(632)	(584)	(540)
(Increase) decrease in
Net realized and unrealized mark-to-market and hedging transactions	(18)	19	50
Receivables	443	(788)	(297)
Inventory	(706)	(476)	(34)
Other current assets	(267)	(1,498)	(1,136)
Increase (decrease) in
Accounts payable	(800)	805	249
Taxes accrued	126	10	284
Other current liabilities	(26)	(153)	(13)
Other assets	914	(1,577)	125
Other liabilities	584	410	95
Net cash provided by operating activities	9,878	5,927	8,290
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(12,604)	(11,367)	(9,715)
Purchases of debt and equity securities	(3,761)	(4,243)	(6,098)
Proceeds from sales and maturities of debt and equity securities	3,824	4,333	6,103
Other	(799)	(727)	(333)
Net cash used in investing activities	(12,475)	(11,973)	(10,935)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from the issuance of long-term debt	10,028	11,874	9,052
Payments for the redemption of long-term debt	(4,737)	(4,396)	(5,294)
Other	(124)	(130)	(94)
Net cash provided by financing activities	2,351	6,129	2,609
Net (decrease) increase in cash, cash equivalents and restricted cash	(246)	83	(36)
Cash, cash equivalents and restricted cash at beginning of period	603	520	556
Cash, cash equivalents and restricted cash at end of period	357	603	520
Supplemental Disclosures:
Cash paid for interest, net of amount capitalized	2,883	2,361	2,248
Cash paid for (received from) income taxes	1	(6)	(3)
Significant non-cash transactions:
Accrued capital expenditures	1,908	1,766	1,325
Duke Energy Florida
CASH FLOWS FROM OPERATING ACTIVITIES
Net income (loss)	1,016	909	738
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion (including amortization of nuclear fuel)	1,260	1,032	1,011
Equity component of AFUDC	(15)	(16)	(16)
Impairment of assets and other charges	(1)	4	19
Deferred income taxes	(89)	285	279
Contributions to qualified pension plans	(9)	(5)
Payments for asset retirement obligations	(80)	(98)	(101)
(Increase) decrease in
Receivables	30	(93)	(45)
Receivables from affiliated companies	(236)	14	(13)
Inventory	(101)	(98)	(15)
Other current assets	496	(640)	(451)
Increase (decrease) in
Accounts payable	(241)	202	47
Accounts payable to affiliated companies	(42)	(32)	124
Taxes accrued	132	2	(30)
Other current liabilities	3	62	(7)
Other assets	163	(704)	(69)
Other liabilities	101	18	(69)
Net cash provided by operating activities	2,387	842	1,402
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(2,529)	(2,247)	(1,923)
Purchases of debt and equity securities	(184)	(193)	(302)
Proceeds from sales and maturities of debt and equity securities	261	279	408
Other	(185)	(108)	(136)
Net cash used in investing activities	(2,637)	(2,269)	(1,953)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from the issuance of long-term debt	1,564	1,298	1,135
Payments for the redemption of long-term debt	(879)	(77)	(575)
Notes payable to affiliated companies	(453)	406	3
Distributions to parent		(175)
Other	(1)	(1)
Net cash provided by financing activities	231	1,451	563
Net (decrease) increase in cash, cash equivalents and restricted cash	(19)	24	12
Cash, cash equivalents and restricted cash at beginning of period	86	62	50
Cash, cash equivalents and restricted cash at end of period	67	86	62
Supplemental Disclosures:
Cash paid for interest, net of amount capitalized	394	339	308
Cash paid for (received from) income taxes	219	(83)	(15)
Significant non-cash transactions:
Accrued capital expenditures	$ 493	$ 394	$ 337