Progress Energy (PREX) 10-Q 4 Aug 22 2022 Q2 Quarterly report Financial data

Cover Page

Cover Page - shares	6 Months Ended
	Jun. 30, 2022	Jul. 31, 2022
Entity Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Jun. 30, 2022
Document Transition Report	false
Entity File Number	1-32853
Entity Registrant Name	DUKE ENERGY CORPORATION
Entity Tax Identification Number	20-2777218
Entity Incorporation, State or Country Code	DE
Entity Address, Address Line One	526 South Church Street
Entity Address, City or Town	Charlotte
Entity Address, State or Province	NC
Entity Address, Postal Zip Code	28202-1803
City Area Code	704
Local Phone Number	382-3853
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		769,968,724
Entity Central Index Key	0001326160
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	Q2
Amendment Flag	false
Duke Energy Carolinas
Entity Information [Line Items]
Entity File Number	1-4928
Entity Registrant Name	DUKE ENERGY CAROLINAS, LLC
Entity Tax Identification Number	56-0205520
Entity Incorporation, State or Country Code	NC
Entity Address, Address Line One	526 South Church Street
Entity Address, City or Town	Charlotte
Entity Address, State or Province	NC
Entity Address, Postal Zip Code	28202-1803
City Area Code	704
Local Phone Number	382-3853
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Central Index Key	0000030371
Current Fiscal Year End Date	--12-31
Progress Energy
Entity Information [Line Items]
Entity File Number	1-15929
Entity Registrant Name	PROGRESS ENERGY, INC.
Entity Tax Identification Number	56-2155481
Entity Incorporation, State or Country Code	NC
Entity Address, Address Line One	410 South Wilmington Street
Entity Address, City or Town	Raleigh
Entity Address, State or Province	NC
Entity Address, Postal Zip Code	27601-1748
City Area Code	704
Local Phone Number	382-3853
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Central Index Key	0001094093
Current Fiscal Year End Date	--12-31
Duke Energy Progress
Entity Information [Line Items]
Entity File Number	1-3382
Entity Registrant Name	DUKE ENERGY PROGRESS, LLC
Entity Tax Identification Number	56-0165465
Entity Incorporation, State or Country Code	NC
Entity Address, Address Line One	410 South Wilmington Street
Entity Address, City or Town	Raleigh
Entity Address, State or Province	NC
Entity Address, Postal Zip Code	27601-1748
City Area Code	704
Local Phone Number	382-3853
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Central Index Key	0000017797
Current Fiscal Year End Date	--12-31
Duke Energy Florida
Entity Information [Line Items]
Entity File Number	1-3274
Entity Registrant Name	DUKE ENERGY FLORIDA, LLC
Entity Tax Identification Number	59-0247770
Entity Incorporation, State or Country Code	FL
Entity Address, Address Line One	299 First Avenue North
Entity Address, City or Town	St. Petersburg
Entity Address, State or Province	FL
Entity Address, Postal Zip Code	33701
City Area Code	704
Local Phone Number	382-3853
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Central Index Key	0000037637
Current Fiscal Year End Date	--12-31
Duke Energy Ohio
Entity Information [Line Items]
Entity File Number	1-1232
Entity Registrant Name	DUKE ENERGY OHIO, INC.
Entity Tax Identification Number	31-0240030
Entity Incorporation, State or Country Code	OH
Entity Address, Address Line One	139 East Fourth Street
Entity Address, City or Town	Cincinnati
Entity Address, State or Province	OH
Entity Address, Postal Zip Code	45202
City Area Code	704
Local Phone Number	382-3853
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Central Index Key	0000020290
Current Fiscal Year End Date	--12-31
Duke Energy Indiana
Entity Information [Line Items]
Entity File Number	1-3543
Entity Registrant Name	DUKE ENERGY INDIANA, LLC
Entity Tax Identification Number	35-0594457
Entity Incorporation, State or Country Code	IN
Entity Address, Address Line One	1000 East Main Street
Entity Address, City or Town	Plainfield
Entity Address, State or Province	IN
Entity Address, Postal Zip Code	46168
City Area Code	704
Local Phone Number	382-3853
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Central Index Key	0000081020
Current Fiscal Year End Date	--12-31
Piedmont
Entity Information [Line Items]
Entity File Number	1-6196
Entity Registrant Name	PIEDMONT NATURAL GAS COMPANY, INC.
Entity Tax Identification Number	56-0556998
Entity Incorporation, State or Country Code	NC
Entity Address, Address Line One	4720 Piedmont Row Drive
Entity Address, City or Town	Charlotte
Entity Address, State or Province	NC
Entity Address, Postal Zip Code	28210
City Area Code	704
Local Phone Number	364-3120
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Central Index Key	0000078460
Current Fiscal Year End Date	--12-31
Common Stock
Entity Information [Line Items]
Title of 12(b) Security	Common Stock, $0.001 par value
Trading Symbol	DUK
Security Exchange Name	NYSE
Junior Subordinated Debentures 5.625% Coupon Due September 2078
Entity Information [Line Items]
Title of 12(b) Security	5.625% Junior Subordinated Debentures
Trading Symbol	DUKB
Security Exchange Name	NYSE
Depositary Share
Entity Information [Line Items]
Title of 12(b) Security	Depositary Shares
Trading Symbol	DUK PR A
Security Exchange Name	NYSE
Senior Notes 3.10% Due 2028
Entity Information [Line Items]
Title of 12(b) Security	3.10% Senior Notes
Trading Symbol	DUK 28A
Security Exchange Name	NYSE
Senior Notes 3.85% Due 2034
Entity Information [Line Items]
Title of 12(b) Security	3.85% Senior Notes
Trading Symbol	DUK 34
Security Exchange Name	NYSE

Condensed Consolidated Statemen

Condensed Consolidated Statements of Operations - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Operating Revenues
Regulated electric	$ 6,074	$ 5,258	$ 12,007	$ 10,477
Regulated natural gas	425	302	1,427	1,051
Nonregulated electric and other	186	198	383	380
Total operating revenues	6,685	5,758	13,817	11,908
Operating Expenses
Operation, maintenance and other	1,447	1,410	3,077	2,812
Depreciation and amortization	1,302	1,207	2,622	2,433
Property and other taxes	379	349	771	702
Impairment of assets and other charges	(9)	131	206	131
Total operating expenses	5,280	4,591	11,135	9,291
Gains on Sales of Other Assets and Other, net	8	2	10	2
Operating Income	1,413	1,169	2,692	2,619
Other Income and Expenses
Equity in earnings (losses) of unconsolidated affiliates	36	9	61	(8)
Other income and expenses, net	115	128	204	255
Total other income and expenses	151	137	265	247
Interest Expense	607	572	1,194	1,107
Income Before Income Taxes	957	734	1,763	1,759
Income Tax Expense	77	36	63	120
Net Income	880	698	1,700	1,639
Add: Net Loss Attributable to Noncontrolling Interests	27	67	64	118
Net Income Attributable to Duke Energy Corporation	907	765	1,764	1,757
Less: Preferred Dividends	14	14	53	53
Net Income Available to Duke Energy Corporation Common Stockholders	$ 893	$ 751	$ 1,711	$ 1,704
Net income available to Duke Energy Corporation common stockholders
Basic (in usd per share)	$ 1.14	$ 0.96	$ 2.22	$ 2.21
Diluted (in usd per share)	$ 1.14	$ 0.96	$ 2.22	$ 2.21
Weighted Average Shares Outstanding
Basic (in shares)	770	769	770	769
Diluted (in shares)	770	769	770	769
Fuel used in electric generation and purchased power
Operating Expenses
Fuel used in electric generation and purchased power/Cost of natural gas	$ 1,972	$ 1,415	$ 3,789	$ 2,858
Cost of natural gas
Operating Expenses
Fuel used in electric generation and purchased power/Cost of natural gas	$ 189	$ 79	$ 670	$ 355

Condensed Consolidated Statem_2

Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest [Abstract]
Net income		$ 880	$ 698	$ 1,700	$ 1,639
Other Comprehensive Income (Loss), net of tax
Pension and OPEB adjustments	[1]	2		4	2
Net unrealized gains (losses) on cash flow hedges	[1]	149	(97)	262	(68)
Reclassification into earnings from cash flow hedges	[1]	4	4	9	7
Net unrealized losses on fair value hedges	[1]	(12)		(12)
Unrealized (losses) gains on available-for-sale securities	[1]	(8)	4	(21)	(4)
Other Comprehensive Income (Loss), net of tax	[1]	135	(89)	242	(63)
Comprehensive Income		1,015	609	1,942	1,576
Add: Comprehensive Loss Attributable to Noncontrolling Interests		23	68	52	112
Comprehensive income		1,038	677	1,994	1,688
Less: Preferred Dividends		14	14	53	53
Comprehensive Income Available to Duke Energy Corporation Common Stockholders		$ 1,024	$ 663	$ 1,941	$ 1,635
[1]Net of income tax impacts of approximately $40 million and $27 million for the three months ended June 30, 2022, and 2021, respectively, and $72 million and $19 million for the six months ended June 30, 2022, and 2021, respectively.

Condensed Consolidated Statem_3

Condensed Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Statement of Comprehensive Income [Abstract]
Other comprehensive income (loss), tax	$ 40	$ 27	$ 72	$ 19

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Current Assets
Cash and cash equivalents	$ 428	$ 343
Receivables (net of allowance for doubtful accounts)	907	1,173
Receivables of VIEs (net of allowance for doubtful accounts)	3,021	2,437
Inventory	3,208	3,199
Regulatory assets (includes amounts related to VIEs)	2,834	2,150
Other (includes amounts related to VIEs)	1,163	638
Total current assets	11,561	9,940
Property, Plant and Equipment
Cost	166,004	161,819
Accumulated depreciation and amortization	(52,252)	(50,555)
Facilities to be retired, net	99	144
Net property, plant and equipment	113,851	111,408
Other Noncurrent Assets
Goodwill	19,303	19,303
Regulatory assets (includes amounts related to VIEs)	12,863	12,487
Nuclear decommissioning trust funds	8,574	10,401
Operating lease right-of-use assets, net	1,222	1,266
Investments in equity method unconsolidated affiliates	983	970
Other (includes amounts related to VIEs)	4,026	3,812
Total other noncurrent assets	46,971	48,239
Total Assets	172,383	169,587
Current Liabilities
Accounts payable	3,971	3,629
Notes payable and commercial paper	3,875	3,304
Taxes accrued	682	749
Interest accrued	554	533
Current maturities of long-term debt (includes amounts related to VIEs)	3,171	3,387
Asset retirement obligations	649	647
Regulatory liabilities	1,383	1,211
Other	2,259	2,471
Total current liabilities	16,544	15,931
Long-Term Debt (includes amounts related to VIEs)	63,147	60,448
Other Noncurrent Liabilities
Deferred income taxes	9,948	9,379
Asset retirement obligations	12,080	12,129
Regulatory liabilities	14,519	16,152
Operating lease liabilities	1,039	1,074
Accrued pension and other post-retirement benefit costs	799	855
Investment tax credits	855	833
Other (includes amounts related to VIEs)	1,868	1,650
Total other noncurrent liabilities	41,108	42,072
Commitments and Contingencies
Equity
Common stock	1	1
Additional paid-in capital	44,373	44,371
Retained earnings	3,457	3,265
Accumulated other comprehensive loss	(73)	(303)
Total Duke Energy Corporation stockholders' equity	49,720	49,296
Noncontrolling interests	1,864	1,840
Total equity	51,584	51,136
Total Liabilities and Equity	172,383	169,587
Preferred stock, Series A
Equity
Preferred stock	973	973
Preferred stock, Series B
Equity
Preferred stock	$ 989	$ 989

Condensed Consolidated Balanc_2

Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Allowance for doubtful accounts - receivables	$ 44	$ 46
Regulatory assets (includes amounts related to VIEs)	2,834	2,150
Current Assets: Other	1,163	638
Regulatory assets (includes amounts related to VIEs)	12,863	12,487
Other Noncurrent Assets: Other	4,026	3,812
Current maturities of long-term debt (includes amounts related to VIEs)	3,171	3,387
Long-Term Debt	63,147	60,448
Other, noncurrent liabilities	$ 1,868	$ 1,650
Common stock, par value (in usd per share)	$ 0.001	$ 0.001
Common stock, shares authorized (in shares)	2,000,000,000	2,000,000,000
Common stock, shares outstanding (in shares)	770,000,000	769,000,000
Preferred stock, Series A
Preferred stock, par value (in usd per share)	$ 0.001	$ 0.001
Preferred stock, depositary shares authorized (in shares)	40,000,000	40,000,000
Preferred stock, depositary shares outstanding (in shares)	40,000,000	40,000,000
Preferred stock, Series B
Preferred stock, par value (in usd per share)	$ 0.001	$ 0.001
Preferred stock, depositary shares authorized (in shares)	1,000,000	1,000,000
Preferred stock, depositary shares outstanding (in shares)	1,000,000	1,000,000
Variable Interest Entity
Allowance for doubtful accounts - receivables of VIEs	$ 92	$ 76
Regulatory assets (includes amounts related to VIEs)	105	105
Current Assets: Other	284	256
Regulatory assets (includes amounts related to VIEs)	1,774	1,823
Other Noncurrent Assets: Other	120	92
Current maturities of long-term debt (includes amounts related to VIEs)	633	243
Long-Term Debt	4,435	4,854
Other, noncurrent liabilities	$ 213	$ 319

Condensed Consolidated Statem_4

Condensed Consolidated Statements of Cash Flows - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 1,700	$ 1,639
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion (including amortization of nuclear fuel)	2,923	2,753
Equity in (earnings) losses of unconsolidated affiliates	(61)	8
Equity component of AFUDC	(99)	(83)
Impairment of assets and other charges	206	131
Deferred income taxes	67	119
Payments for asset retirement obligations	(255)	(263)
Provision for rate refunds	(65)	(13)
(Increase) decrease in
Net realized and unrealized mark-to-market and hedging transactions	351	15
Receivables	(180)	85
Inventory	(12)	153
Other current assets	(1,144)	(297)
Increase (decrease) in
Accounts payable	408	(297)
Taxes accrued	(49)	219
Other current liabilities	99	(326)
Other assets	55	77
Other liabilities	91	(47)
Net cash provided by operating activities	4,035	3,873
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(5,117)	(4,636)
Contributions to equity method investments	(32)	(21)
Purchases of debt and equity securities	(2,184)	(3,182)
Proceeds from sales and maturities of debt and equity securities	2,225	3,217
Disbursements to canceled equity method investments		(855)
Other	(384)	(137)
Net cash used in investing activities	(5,492)	(5,614)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from the issuance of long-term debt	5,714	4,627
Proceeds from the issuance of common stock		5
Payments for the redemption of long-term debt	(3,147)	(2,002)
Proceeds from the issuance of short-term debt with original maturities greater than 90 days	30	75
Payments for the redemption of short-term debt with original maturities greater than 90 days	(257)	(959)
Notes payable and commercial paper	785	1,299
Contributions from noncontrolling interests	126	318
Dividends paid	(1,574)	(1,541)
Other	(101)	(72)
Net cash provided by financing activities	1,576	1,750
Net increase in cash, cash equivalents and restricted cash	119	9
Cash, cash equivalents and restricted cash at beginning of period	520	556
Cash, cash equivalents and restricted cash at end of period	639	565
Significant non-cash transactions:
Accrued capital expenditures	$ 1,264	$ 990

Condensed Consolidated Statem_5

Condensed Consolidated Statements of Changes in Equity - USD ($) shares in Millions, $ in Millions		Total		Preferred Stock	Common Stockholders' Equity	Additional Paid-in Capital	Retained Earnings	Net Gains (Losses) on Hedges	[1]	Accumulated Other Comprehensive (Loss) Income, Net Unrealized (Losses) Gains on Available-for-Sale-Securities	Accumulated Other Comprehensive (Loss) Income, Pension and OPEB Adjustments	Noncontrolling Interests	Common Stock	Common Stock Common Stockholders' Equity	Common Stock Common Stock	Common Stock Additional Paid-in Capital
Beginning Balance at Dec. 31, 2020		$ 49,184		$ 1,962	$ 47,964	$ 43,767	$ 2,471	$ (167)		$ 6	$ (76)	$ 1,220			$ 1
Beginning Balance, in shares at Dec. 31, 2020															769
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)		1,586			1,704		1,704					(118)
Other comprehensive (loss) income		(63)	[2]		(69)			(67)		(4)	2	6
Common stock issuances, including dividend reinvestment and employee benefits													$ 23	$ 23		$ 23
Common stock dividends		(1,488)			(1,488)		(1,488)
Contributions from noncontrolling interests, net of transaction costs	[3]	315			(3)	(3)						318
Distributions to noncontrolling interest in subsidiaries		(12)										(12)
Other		0			1	1	0					(1)
Ending Balance at Jun. 30, 2021		49,545		1,962	48,132	43,788	2,687	(234)		2	(74)	1,413			$ 1
Ending Balance, in shares at Jun. 30, 2021															769
Beginning Balance at Mar. 31, 2021		49,658		1,962	48,186	43,761	2,680	(142)		(2)	(74)	1,472			$ 1
Beginning Balance, in shares at Mar. 31, 2021															769
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)		684			751		751					(67)
Other comprehensive (loss) income		(89)	[2]		(88)			(92)		4	0	(1)
Common stock issuances, including dividend reinvestment and employee benefits													26	26		26
Common stock dividends		(744)			(744)		(744)
Contributions from noncontrolling interests, net of transaction costs	[3]	15			0	0						15
Distributions to noncontrolling interest in subsidiaries		(5)										(5)
Other					1	1						(1)
Ending Balance at Jun. 30, 2021		49,545		1,962	48,132	43,788	2,687	(234)		2	(74)	1,413			$ 1
Ending Balance, in shares at Jun. 30, 2021															769
Beginning Balance at Dec. 31, 2021		$ 51,136		1,962	49,296	44,371	3,265	(232)		(2)	(69)	1,840			$ 1
Beginning Balance, in shares at Dec. 31, 2021		769													769
Beginning Balance (parent) at Dec. 31, 2021		$ 49,296
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)		1,647			1,711		1,711					(64)
Other comprehensive (loss) income		242	[2]		230			247		(21)	4	12
Common stock issuances, including dividend reinvestment and employee benefits													20	20	$ 1	20
Common stock dividends		(1,521)			(1,521)		(1,521)
Sale of noncontrolling interest		21			(17)	(17)						38
Contributions from noncontrolling interests, net of transaction costs	[3]	88										88
Distributions to noncontrolling interest in subsidiaries		(50)										(50)
Other		1			1	(1)	2
Ending Balance at Jun. 30, 2022		$ 51,584		1,962	49,720	44,373	3,457	15		(23)	(65)	1,864			$ 1
Ending Balance, in shares at Jun. 30, 2022		770													770
Ending Balance (parent) at Jun. 30, 2022		$ 49,720
Beginning Balance at Mar. 31, 2022		51,252		1,962	49,446	44,364	3,323	(122)		(15)	(67)	1,806			$ 1
Beginning Balance, in shares at Mar. 31, 2022															770
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)		866			893		893					(27)
Other comprehensive (loss) income		135	[2]		131			137		(8)	2	4
Common stock issuances, including dividend reinvestment and employee benefits													$ 27	$ 27		$ 27
Common stock dividends		(761)			(761)		(761)
Sale of noncontrolling interest		21			(17)	(17)						38
Contributions from noncontrolling interests, net of transaction costs	[3]	65			0	0						65
Distributions to noncontrolling interest in subsidiaries		(22)										(22)
Other		1			1	(1)	2
Ending Balance at Jun. 30, 2022		$ 51,584		$ 1,962	$ 49,720	$ 44,373	$ 3,457	$ 15		$ (23)	$ (65)	$ 1,864			$ 1
Ending Balance, in shares at Jun. 30, 2022		770													770
Ending Balance (parent) at Jun. 30, 2022		$ 49,720
[1]See Duke Energy Condensed Consolidated Statements of Comprehensive Income for detailed activity related to Cash Flow and Fair Value hedges.[2]Net of income tax impacts of approximately $40 million and $27 million for the three months ended June 30, 2022, and 2021, respectively, and $72 million and $19 million for the six months ended June 30, 2022, and 2021, respectively.[3]Relates to tax equity financing activity in the Commercial Renewables segment.

Condensed Consolidated Statem_6

Condensed Consolidated Statements of Operations and Comprehensive Income - Duke Energy Carolinas - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Operating Revenues	$ 6,685	$ 5,758	$ 13,817	$ 11,908
Operating Expenses
Operation, maintenance and other	1,447	1,410	3,077	2,812
Depreciation and amortization	1,302	1,207	2,622	2,433
Property and other taxes	379	349	771	702
Impairment of assets and other charges	(9)	131	206	131
Total operating expenses	5,280	4,591	11,135	9,291
Gains on Sales of Other Assets and Other, net	8	2	10	2
Operating Income	1,413	1,169	2,692	2,619
Total other income and expenses	151	137	265	247
Interest Expense	607	572	1,194	1,107
Income Before Income Taxes	957	734	1,763	1,759
Income Tax Expense	77	36	63	120
Comprehensive Income	1,038	677	1,994	1,688
Net Income Attributable to Duke Energy Corporation	907	765	1,764	1,757
Duke Energy Carolinas
Operating Revenues	1,781	1,610	3,669	3,326
Operating Expenses
Fuel used in electric generation and purchased power/Cost of natural gas	431	344	879	766
Operation, maintenance and other	462	435	974	876
Depreciation and amortization	384	363	763	722
Property and other taxes	77	74	170	157
Impairment of assets and other charges	(12)	75	(9)	75
Total operating expenses	1,342	1,291	2,777	2,596
Gains on Sales of Other Assets and Other, net		2		2
Operating Income	439	321	892	732
Total other income and expenses	58	44	113	92
Interest Expense	143	139	284	263
Income Before Income Taxes	354	226	721	561
Income Tax Expense	26	1	53	24
Comprehensive Income	328	225	668	537
Net Income Attributable to Duke Energy Corporation	$ 328	$ 225	$ 668	$ 537

Condensed Consolidated Balanc_3

Condensed Consolidated Balance Sheets - Duke Energy Carolinas - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Current Assets
Cash and cash equivalents	$ 428	$ 343
Receivables of VIEs (net of allowance for doubtful accounts)	3,021	2,437
Receivables (net of allowance for doubtful accounts)	907	1,173
Inventory	3,208	3,199
Regulatory assets (includes amounts related to VIEs)	2,834	2,150
Other (includes amounts related to VIEs)	1,163	638
Total current assets	11,561	9,940
Property, Plant and Equipment
Cost	166,004	161,819
Accumulated depreciation and amortization	(52,252)	(50,555)
Facilities to be retired, net	99	144
Net property, plant and equipment	113,851	111,408
Other Noncurrent Assets
Regulatory assets (includes amounts related to VIEs)	12,863	12,487
Nuclear decommissioning trust funds	8,574	10,401
Operating lease right-of-use assets, net	1,222	1,266
Other (includes amounts related to VIEs)	4,026	3,812
Total other noncurrent assets	46,971	48,239
Total Assets	172,383	169,587
Current Liabilities
Accounts payable	3,971	3,629
Taxes accrued	682	749
Interest accrued	554	533
Current maturities of long-term debt (includes amounts related to VIEs)	3,171	3,387
Asset retirement obligations	649	647
Regulatory liabilities	1,383	1,211
Other	2,259	2,471
Total current liabilities	16,544	15,931
Long-Term Debt (includes amounts related to VIEs)	63,147	60,448
Other Noncurrent Liabilities
Deferred income taxes	9,948	9,379
Asset retirement obligations	12,080	12,129
Regulatory liabilities	14,519	16,152
Operating lease liabilities	1,039	1,074
Accrued pension and other post-retirement benefit costs	799	855
Investment tax credits	855	833
Other (includes amounts related to VIEs)	1,868	1,650
Total other noncurrent liabilities	41,108	42,072
Commitments and Contingencies
Equity
Accumulated other comprehensive loss	(73)	(303)
Total Liabilities and Equity	172,383	169,587
Duke Energy Carolinas
Current Assets
Cash and cash equivalents	37	7
Receivables of VIEs (net of allowance for doubtful accounts)	269	300
Receivables (net of allowance for doubtful accounts)	893	844
Receivables from affiliated companies	241	190
Inventory	1,033	1,026
Regulatory assets (includes amounts related to VIEs)	757	544
Other (includes amounts related to VIEs)	128	95
Total current assets	3,358	3,006
Property, Plant and Equipment
Cost	53,074	51,874
Accumulated depreciation and amortization	(18,205)	(17,854)
Facilities to be retired, net	90	102
Net property, plant and equipment	34,959	34,122
Other Noncurrent Assets
Regulatory assets (includes amounts related to VIEs)	3,339	2,935
Nuclear decommissioning trust funds	4,729	5,759
Operating lease right-of-use assets, net	84	92
Other (includes amounts related to VIEs)	1,305	1,248
Total other noncurrent assets	9,457	10,034
Total Assets	47,774	47,162
Current Liabilities
Accounts payable	1,158	988
Accounts payable to affiliated companies	189	266
Notes payable to affiliated companies	29	226
Taxes accrued	177	274
Interest accrued	135	125
Current maturities of long-term debt (includes amounts related to VIEs)	1,018	362
Asset retirement obligations	254	249
Regulatory liabilities	460	487
Other	470	546
Total current liabilities	3,890	3,523
Long-Term Debt (includes amounts related to VIEs)	12,844	12,595
Long-Term Debt Payable to Affiliated Companies	300	318
Other Noncurrent Liabilities
Deferred income taxes	3,911	3,634
Asset retirement obligations	5,065	5,052
Regulatory liabilities	6,300	7,198
Operating lease liabilities	70	78
Accrued pension and other post-retirement benefit costs	42	50
Investment tax credits	285	287
Other (includes amounts related to VIEs)	558	536
Total other noncurrent liabilities	16,231	16,835
Commitments and Contingencies
Equity
Member's equity	14,515	13,897
Accumulated other comprehensive loss	(6)	(6)
Total equity	14,509	13,891
Total Liabilities and Equity	$ 47,774	$ 47,162

Condensed Consolidated Balanc_4

Condensed Consolidated Balance Sheets - Duke Energy Carolinas (Parenthetical) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Allowance for doubtful accounts - receivables	$ 44	$ 46
Regulatory assets (includes amounts related to VIEs)	2,834	2,150
Current Assets: Other	1,163	638
Regulatory assets (includes amounts related to VIEs)	12,863	12,487
Current maturities of long-term debt (includes amounts related to VIEs)	3,171	3,387
Long-Term Debt	63,147	60,448
Variable Interest Entity
Allowance for doubtful accounts - receivables of VIEs	92	76
Regulatory assets (includes amounts related to VIEs)	105	105
Current Assets: Other	284	256
Regulatory assets (includes amounts related to VIEs)	1,774	1,823
Current maturities of long-term debt (includes amounts related to VIEs)	633	243
Long-Term Debt	4,435	4,854
Duke Energy Carolinas
Allowance for doubtful accounts - receivables	2	1
Allowance for doubtful accounts - receivables of VIEs	50	41
Regulatory assets (includes amounts related to VIEs)	757	544
Current Assets: Other	128	95
Regulatory assets (includes amounts related to VIEs)	3,339	2,935
Current maturities of long-term debt (includes amounts related to VIEs)	1,018	362
Long-Term Debt	12,844	12,595
Duke Energy Carolinas | Variable Interest Entity
Regulatory assets (includes amounts related to VIEs)	12	12
Current Assets: Other	8	0
Regulatory assets (includes amounts related to VIEs)	214	220
Current maturities of long-term debt (includes amounts related to VIEs)	10	5
Long-Term Debt	$ 721	$ 703

Condensed Consolidated Statem_7

Condensed Consolidated Statements of Cash Flows - Duke Energy Carolinas - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
CASH FLOWS FROM OPERATING ACTIVITIES
Net Income Attributable to Duke Energy Corporation	$ 1,764	$ 1,757
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion (including amortization of nuclear fuel)	2,923	2,753
Equity component of AFUDC	(99)	(83)
Impairment of assets and other charges	206	131
Deferred income taxes	67	119
Payments for asset retirement obligations	(255)	(263)
Provision for rate refunds	(65)	(13)
(Increase) decrease in
Net realized and unrealized mark-to-market and hedging transactions	351	15
Receivables	(180)	85
Inventory	(12)	153
Other current assets	(1,144)	(297)
Increase (decrease) in
Accounts payable	408	(297)
Taxes accrued	(49)	219
Other current liabilities	99	(326)
Other assets	55	77
Other liabilities	91	(47)
Net cash provided by operating activities	4,035	3,873
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(5,117)	(4,636)
Purchases of debt and equity securities	(2,184)	(3,182)
Proceeds from sales and maturities of debt and equity securities	2,225	3,217
Other	(384)	(137)
Net cash used in investing activities	(5,492)	(5,614)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from the issuance of long-term debt	5,714	4,627
Payments for the redemption of long-term debt	(3,147)	(2,002)
Other	(101)	(72)
Net cash provided by financing activities	1,576	1,750
Net increase in cash, cash equivalents and restricted cash	119	9
Cash, cash equivalents and restricted cash at beginning of period	520	556
Cash, cash equivalents and restricted cash at end of period	639	565
Significant non-cash transactions:
Accrued capital expenditures	1,264	990
Duke Energy Carolinas
CASH FLOWS FROM OPERATING ACTIVITIES
Net Income Attributable to Duke Energy Corporation	668	537
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion (including amortization of nuclear fuel)	892	861
Equity component of AFUDC	(47)	(30)
Impairment of assets and other charges	(9)	75
Deferred income taxes	95	(41)
Payments for asset retirement obligations	(87)	(93)
Provision for rate refunds	(36)	(11)
(Increase) decrease in
Net realized and unrealized mark-to-market and hedging transactions	55	4
Receivables	23
Receivables from affiliated companies	(51)	13
Inventory	(7)	(3)
Other current assets	(514)	(45)
Increase (decrease) in
Accounts payable	124	(266)
Accounts payable to affiliated companies	(95)	(4)
Taxes accrued	(97)	127
Other current liabilities	151	(152)
Other assets	(9)	8
Other liabilities	(33)	18
Net cash provided by operating activities	1,023	998
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(1,523)	(1,251)
Purchases of debt and equity securities	(1,073)	(1,847)
Proceeds from sales and maturities of debt and equity securities	1,073	1,847
Other	(118)	(80)
Net cash used in investing activities	(1,641)	(1,331)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from the issuance of long-term debt	1,287	1,298
Payments for the redemption of long-term debt	(382)	(614)
Notes receivable from affiliated companies	(197)	(35)
Distributions to parent	(50)	(300)
Other	(1)	(1)
Net cash provided by financing activities	657	348
Net increase in cash, cash equivalents and restricted cash	39	15
Cash, cash equivalents and restricted cash at beginning of period	8	21
Cash, cash equivalents and restricted cash at end of period	47	36
Significant non-cash transactions:
Accrued capital expenditures	$ 413	$ 315

Condensed Consolidated Statem_8

Condensed Consolidated Statements of Changes in Equity - Duke Energy Carolinas - USD ($) $ in Millions	Total	Duke Energy Carolinas	Duke Energy Carolinas Member's Equity	Duke Energy Carolinas Accumulated Other Comprehensive (Loss) Income, Net (Losses) Gains on Cash Flow Hedges
Beginning Balance (member's equity) at Dec. 31, 2020		$ 13,154	$ 13,161	$ (7)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income Attributable to Duke Energy Corporation	$ 1,757	537	537
Common stock dividends	(1,488)	(300)	(300)
Other	0	1	1
Ending Balance (member's equity) at Jun. 30, 2021		13,392	13,399	(7)
Beginning Balance (member's equity) at Mar. 31, 2021		13,466	13,473	(7)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income Attributable to Duke Energy Corporation	765	225	225
Common stock dividends	(744)	(300)	(300)
Other		1	1
Ending Balance (member's equity) at Jun. 30, 2021		13,392	13,399	(7)
Beginning Balance (member's equity) at Dec. 31, 2021		13,891	13,897	(6)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income Attributable to Duke Energy Corporation	1,764	668	668
Common stock dividends	(1,521)	(50)	(50)
Other	1
Ending Balance (member's equity) at Jun. 30, 2022		14,509	14,515	(6)
Beginning Balance (member's equity) at Mar. 31, 2022		14,182	14,188	(6)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income Attributable to Duke Energy Corporation	907	328	328
Common stock dividends	(761)
Other	$ 1	(1)	(1)
Ending Balance (member's equity) at Jun. 30, 2022		$ 14,509	$ 14,515	$ (6)

Condensed Consolidated Statem_9

Condensed Consolidated Statements of Operations and Comprehensive Income - Progress Energy - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Operating Revenues		$ 6,685	$ 5,758	$ 13,817	$ 11,908
Operating Expenses
Operation, maintenance and other		1,447	1,410	3,077	2,812
Depreciation and amortization		1,302	1,207	2,622	2,433
Property and other taxes		379	349	771	702
Impairment of assets and other charges		(9)	131	206	131
Total operating expenses		5,280	4,591	11,135	9,291
Gains on Sales of Other Assets and Other, net		8	2	10	2
Operating Income		1,413	1,169	2,692	2,619
Total other income and expenses		151	137	265	247
Interest Expense		607	572	1,194	1,107
Income Before Income Taxes		957	734	1,763	1,759
Income Tax Expense		77	36	63	120
Net Income		880	698	1,700	1,639
Add: Net Loss Attributable to Noncontrolling Interests		(27)	(67)	(64)	(118)
Net Income Attributable to Duke Energy Corporation		907	765	1,764	1,757
Pension and OPEB adjustments	[1]	2		4	2
Net unrealized gains (losses) on cash flow hedges	[1]	149	(97)	262	(68)
Unrealized (losses) gains on available-for-sale securities	[1]	(8)	4	(21)	(4)
Other comprehensive (loss) income	[1]	135	(89)	242	(63)
Comprehensive Income		1,015	609	1,942	1,576
Progress Energy
Operating Revenues		3,214	2,679	6,206	5,184
Operating Expenses
Fuel used in electric generation and purchased power/Cost of natural gas		1,258	833	2,322	1,628
Operation, maintenance and other		603	626	1,248	1,227
Depreciation and amortization		509	441	1,045	926
Property and other taxes		151	133	303	275
Impairment of assets and other charges		4	37	4	37
Total operating expenses		2,525	2,070	4,922	4,093
Gains on Sales of Other Assets and Other, net		1	1	3	1
Operating Income		690	610	1,287	1,092
Total other income and expenses		70	38	105	81
Interest Expense		208	200	419	392
Income Before Income Taxes		552	448	973	781
Income Tax Expense		93	37	160	80
Net Income		459	411	813	701
Add: Net Loss Attributable to Noncontrolling Interests		1	0	1	0
Net Income Attributable to Duke Energy Corporation		458	411	812	701
Pension and OPEB adjustments			1		1
Net unrealized gains (losses) on cash flow hedges				1	1
Unrealized (losses) gains on available-for-sale securities		(1)	1	(3)
Other comprehensive (loss) income		(1)	2	(2)	2
Comprehensive Income		$ 458	$ 413	$ 811	$ 703
[1]Net of income tax impacts of approximately $40 million and $27 million for the three months ended June 30, 2022, and 2021, respectively, and $72 million and $19 million for the six months ended June 30, 2022, and 2021, respectively.

Condensed Consolidated Balanc_5

Condensed Consolidated Balance Sheets - Progress Energy - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Current Assets
Cash and cash equivalents	$ 428	$ 343
Receivables of VIEs (net of allowance for doubtful accounts)	3,021	2,437
Receivables (net of allowance for doubtful accounts)	907	1,173
Inventory	3,208	3,199
Regulatory assets (includes amounts related to VIEs)	2,834	2,150
Other (includes amounts related to VIEs)	1,163	638
Total current assets	11,561	9,940
Property, Plant and Equipment
Cost	166,004	161,819
Accumulated depreciation and amortization	(52,252)	(50,555)
Facilities to be retired, net	99	144
Net property, plant and equipment	113,851	111,408
Other Noncurrent Assets
Goodwill	19,303	19,303
Regulatory assets (includes amounts related to VIEs)	12,863	12,487
Nuclear decommissioning trust funds	8,574	10,401
Operating lease right-of-use assets, net	1,222	1,266
Other (includes amounts related to VIEs)	4,026	3,812
Total other noncurrent assets	46,971	48,239
Total Assets	172,383	169,587
Current Liabilities
Accounts payable	3,971	3,629
Taxes accrued	682	749
Interest accrued	554	533
Current maturities of long-term debt (includes amounts related to VIEs)	3,171	3,387
Asset retirement obligations	649	647
Regulatory liabilities	1,383	1,211
Other	2,259	2,471
Total current liabilities	16,544	15,931
Long-Term Debt (includes amounts related to VIEs)	63,147	60,448
Other Noncurrent Liabilities
Deferred income taxes	9,948	9,379
Asset retirement obligations	12,080	12,129
Regulatory liabilities	14,519	16,152
Operating lease liabilities	1,039	1,074
Accrued pension and other post-retirement benefit costs	799	855
Other (includes amounts related to VIEs)	1,868	1,650
Total other noncurrent liabilities	41,108	42,072
Commitments and Contingencies
Equity
Common stock	1	1
Additional paid-in capital	44,373	44,371
Retained earnings	3,457	3,265
Accumulated other comprehensive loss	(73)	(303)
Total Duke Energy Corporation stockholders' equity	49,720	49,296
Stockholders' Equity Attributable to Noncontrolling Interest	1,864	1,840
Total equity	51,584	51,136
Total Liabilities and Equity	172,383	169,587
Progress Energy
Current Assets
Cash and cash equivalents	129	70
Receivables of VIEs (net of allowance for doubtful accounts)	192	247
Receivables (net of allowance for doubtful accounts)	1,352	1,006
Receivables from affiliated companies	22	121
Notes receivable from affiliated companies	108
Inventory	1,426	1,398
Regulatory assets (includes amounts related to VIEs)	1,406	1,030
Other (includes amounts related to VIEs)	170	125
Total current assets	4,805	3,997
Property, Plant and Equipment
Cost	62,609	60,894
Accumulated depreciation and amortization	(20,082)	(19,214)
Facilities to be retired, net		26
Net property, plant and equipment	42,527	41,706
Other Noncurrent Assets
Goodwill	3,655	3,655
Regulatory assets (includes amounts related to VIEs)	6,081	5,909
Nuclear decommissioning trust funds	3,845	4,642
Operating lease right-of-use assets, net	677	691
Other (includes amounts related to VIEs)	1,241	1,242
Total other noncurrent assets	15,499	16,139
Total Assets	62,831	61,842
Current Liabilities
Accounts payable	1,219	1,099
Accounts payable to affiliated companies	965	506
Notes payable to affiliated companies	458	2,809
Taxes accrued	221	128
Interest accrued	197	192
Current maturities of long-term debt (includes amounts related to VIEs)	393	1,082
Asset retirement obligations	262	275
Regulatory liabilities	580	478
Other	830	868
Total current liabilities	5,125	7,437
Long-Term Debt (includes amounts related to VIEs)	20,208	19,591
Long-Term Debt Payable to Affiliated Companies	150	150
Other Noncurrent Liabilities
Deferred income taxes	4,748	4,564
Asset retirement obligations	5,806	5,837
Regulatory liabilities	5,094	5,566
Operating lease liabilities	600	606
Accrued pension and other post-retirement benefit costs	399	417
Other (includes amounts related to VIEs)	561	526
Total other noncurrent liabilities	17,208	17,516
Commitments and Contingencies
Equity
Additional paid-in capital	9,149	9,149
Retained earnings	11,001	8,007
Accumulated other comprehensive loss	(13)	(11)
Total Duke Energy Corporation stockholders' equity	20,137	17,145
Stockholders' Equity Attributable to Noncontrolling Interest	3	3
Total equity	20,140	17,148
Total Liabilities and Equity	$ 62,831	$ 61,842

Condensed Consolidated Balanc_6

Condensed Consolidated Balance Sheets - Progress Energy (Parenthetical) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Allowance for doubtful accounts - receivables	$ 44	$ 46
Regulatory assets (includes amounts related to VIEs)	2,834	2,150
Current Assets: Other	1,163	638
Regulatory assets (includes amounts related to VIEs)	12,863	12,487
Current maturities of long-term debt (includes amounts related to VIEs)	3,171	3,387
Long-Term Debt	$ 63,147	$ 60,448
Common stock, par value (in usd per share)	$ 0.001	$ 0.001
Common stock, shares authorized (in shares)	2,000,000,000	2,000,000,000
Common stock, shares outstanding (in shares)	770,000,000	769,000,000
Variable Interest Entity
Allowance for doubtful accounts - receivables of VIEs	$ 92	$ 76
Regulatory assets (includes amounts related to VIEs)	105	105
Current Assets: Other	284	256
Regulatory assets (includes amounts related to VIEs)	1,774	1,823
Current maturities of long-term debt (includes amounts related to VIEs)	633	243
Long-Term Debt	4,435	4,854
Progress Energy
Allowance for doubtful accounts - receivables	12	12
Regulatory assets (includes amounts related to VIEs)	1,406	1,030
Current Assets: Other	170	125
Regulatory assets (includes amounts related to VIEs)	6,081	5,909
Current maturities of long-term debt (includes amounts related to VIEs)	393	1,082
Long-Term Debt	$ 20,208	$ 19,591
Common stock, par value (in usd per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	100	100
Common stock, shares outstanding (in shares)	100	100
Progress Energy | Variable Interest Entity
Allowance for doubtful accounts - receivables of VIEs	$ 40	$ 25
Regulatory assets (includes amounts related to VIEs)	93
Current Assets: Other	59	39
Regulatory assets (includes amounts related to VIEs)	1,560	1,603
Current maturities of long-term debt (includes amounts related to VIEs)	338	71
Long-Term Debt	$ 2,047	$ 2,293

Condensed Consolidated State_10

Condensed Consolidated Statements of Cash Flows - Progress Energy - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 1,700	$ 1,639
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion (including amortization of nuclear fuel)	2,923	2,753
Equity component of AFUDC	(99)	(83)
Impairment of assets and other charges	206	131
Deferred income taxes	67	119
Payments for asset retirement obligations	(255)	(263)
Provision for rate refunds	(65)	(13)
(Increase) decrease in
Net realized and unrealized mark-to-market and hedging transactions	351	15
Receivables	(180)	85
Inventory	(12)	153
Other current assets	(1,144)	(297)
Increase (decrease) in
Accounts payable	408	(297)
Taxes accrued	(49)	219
Other current liabilities	99	(326)
Other assets	55	77
Other liabilities	91	(47)
Net cash provided by operating activities	4,035	3,873
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(5,117)	(4,636)
Purchases of debt and equity securities	(2,184)	(3,182)
Proceeds from sales and maturities of debt and equity securities	2,225	3,217
Other	(384)	(137)
Net cash used in investing activities	(5,492)	(5,614)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from the issuance of long-term debt	5,714	4,627
Payments for the redemption of long-term debt	(3,147)	(2,002)
Other	(101)	(72)
Net cash provided by financing activities	1,576	1,750
Net increase in cash, cash equivalents and restricted cash	119	9
Cash, cash equivalents and restricted cash at beginning of period	520	556
Cash, cash equivalents and restricted cash at end of period	639	565
Significant non-cash transactions:
Accrued capital expenditures	1,264	990
Progress Energy
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	813	701
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion (including amortization of nuclear fuel)	1,209	1,104
Equity component of AFUDC	(33)	(23)
Impairment of assets and other charges	4	37
Deferred income taxes	95	163
Payments for asset retirement obligations	(137)	(139)
Provision for rate refunds	(30)	(7)
(Increase) decrease in
Net realized and unrealized mark-to-market and hedging transactions	314	16
Receivables	(246)	(12)
Receivables from affiliated companies	117	88
Inventory	(30)	76
Other current assets	(417)	(247)
Increase (decrease) in
Accounts payable	161	44
Accounts payable to affiliated companies	459	42
Taxes accrued	93	97
Other current liabilities	74	(79)
Other assets	(76)	(33)
Other liabilities	(2)	(156)
Net cash provided by operating activities	2,368	1,672
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(1,944)	(1,745)
Purchases of debt and equity securities	(996)	(1,160)
Proceeds from sales and maturities of debt and equity securities	1,032	1,201
Notes receivable from affiliated companies	(108)
Other	(21)	(69)
Net cash used in investing activities	(2,037)	(1,773)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from the issuance of long-term debt	940	19
Payments for the redemption of long-term debt	(1,019)	(41)
Notes receivable from affiliated companies	80	34
Dividends to parent	(250)
Other	(3)	(3)
Net cash provided by financing activities	(252)	9
Net increase in cash, cash equivalents and restricted cash	79	(92)
Cash, cash equivalents and restricted cash at beginning of period	113	200
Cash, cash equivalents and restricted cash at end of period	192	108
Significant non-cash transactions:
Accrued capital expenditures	$ 455	$ 329

Condensed Consolidated State_11

Condensed Consolidated Statements of Changes in Equity - Progress Energy - USD ($) $ in Millions	Total		Common Stockholders' Equity	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive (Loss) Income, Net Unrealized (Losses) Gains on Available-for-Sale-Securities	Accumulated Other Comprehensive (Loss) Income, Pension and OPEB Adjustments	Noncontrolling Interests	Progress Energy	Progress Energy Common Stockholders' Equity	Progress Energy Additional Paid-in Capital	Progress Energy Retained Earnings	Progress Energy Accumulated Other Comprehensive (Loss) Income, Net (Losses) Gains on Cash Flow Hedges	Progress Energy Accumulated Other Comprehensive (Loss) Income, Net Unrealized (Losses) Gains on Available-for-Sale-Securities	Progress Energy Accumulated Other Comprehensive (Loss) Income, Pension and OPEB Adjustments	Progress Energy Noncontrolling Interests
Beginning Balance at Dec. 31, 2020	$ 49,184		$ 47,964	$ 43,767	$ 2,471	$ 6	$ (76)	$ 1,220	$ 16,241	$ 16,237	$ 9,143	$ 7,109	$ (5)	$ (2)	$ (8)	$ 4
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	1,639								701	701		701
Other comprehensive (loss) income	(63)	[1]	(69)			(4)	2	6	2	2			1		1
Common stock dividends	(1,488)		(1,488)		(1,488)
Distributions to noncontrolling interests	(12)							(12)	(1)							(1)
Other	0		1	1	0			(1)	(1)	(1)		(1)
Ending Balance at Jun. 30, 2021	49,545		48,132	43,788	2,687	2	(74)	1,413	16,942	16,939	9,143	7,809	(4)	(2)	(7)	3
Beginning Balance at Mar. 31, 2021	49,658		48,186	43,761	2,680	(2)	(74)	1,472	16,530	16,528	9,143	7,400	(4)	(3)	(8)	2
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	698								411	411		411
Other comprehensive (loss) income	(89)	[1]	(88)			4	0	(1)	2	2				1	1
Common stock dividends	(744)		(744)		(744)
Distributions to noncontrolling interests	(5)							(5)
Other			1	1				(1)	(1)	(2)		(2)				1
Ending Balance at Jun. 30, 2021	49,545		48,132	43,788	2,687	2	(74)	1,413	16,942	16,939	9,143	7,809	(4)	(2)	(7)	3
Beginning Balance at Dec. 31, 2021	51,136		49,296	44,371	3,265	(2)	(69)	1,840	17,148	17,145	9,149	8,007	(2)	(2)	(7)	3
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	1,700								813	812		812				1
Other comprehensive (loss) income	242	[1]	230			(21)	4	12	(2)	(2)			1	(3)
Common stock dividends	(1,521)		(1,521)		(1,521)				(250)	(250)		(250)
Distributions to noncontrolling interests	(50)							(50)	(1)							(1)
Equitization of certain notes payable to affiliates									2,431	2,431		2,431
Other	1		1	(1)	2				1	1		1
Ending Balance at Jun. 30, 2022	51,584		49,720	44,373	3,457	(23)	(65)	1,864	20,140	20,137	9,149	11,001	(1)	(5)	(7)	3
Beginning Balance at Mar. 31, 2022	51,252		49,446	44,364	3,323	(15)	(67)	1,806	19,682	19,680	9,149	10,543	(1)	(4)	(7)	2
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	880								459	458		458				1
Other comprehensive (loss) income	135	[1]	131			(8)	2	4	(1)	(1)				(1)
Common stock dividends	(761)		(761)		(761)
Distributions to noncontrolling interests	(22)							(22)
Other	1		1	(1)	2
Ending Balance at Jun. 30, 2022	$ 51,584		$ 49,720	$ 44,373	$ 3,457	$ (23)	$ (65)	$ 1,864	$ 20,140	$ 20,137	$ 9,149	$ 11,001	$ (1)	$ (5)	$ (7)	$ 3
[1]Net of income tax impacts of approximately $40 million and $27 million for the three months ended June 30, 2022, and 2021, respectively, and $72 million and $19 million for the six months ended June 30, 2022, and 2021, respectively.

Condensed Consolidated State_12

Condensed Consolidated Statements of Operations and Comprehensive Income - Duke Energy Progress - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Operating Revenues	$ 6,685	$ 5,758	$ 13,817	$ 11,908
Operating Expenses
Operation, maintenance and other	1,447	1,410	3,077	2,812
Depreciation and amortization	1,302	1,207	2,622	2,433
Property and other taxes	379	349	771	702
Impairment of assets and other charges	(9)	131	206	131
Total operating expenses	5,280	4,591	11,135	9,291
Gains on Sales of Other Assets and Other, net	8	2	10	2
Operating Income	1,413	1,169	2,692	2,619
Total other income and expenses	151	137	265	247
Interest Expense	607	572	1,194	1,107
Income Before Income Taxes	957	734	1,763	1,759
Income Tax Expense	77	36	63	120
Comprehensive Income	1,038	677	1,994	1,688
Net Income Attributable to Duke Energy Corporation	907	765	1,764	1,757
Duke Energy Progress
Operating Revenues	1,581	1,349	3,213	2,750
Operating Expenses
Fuel used in electric generation and purchased power/Cost of natural gas	593	409	1,167	845
Operation, maintenance and other	360	367	751	724
Depreciation and amortization	271	236	577	521
Property and other taxes	41	41	90	90
Impairment of assets and other charges	4	18	4	18
Total operating expenses	1,269	1,071	2,589	2,198
Gains on Sales of Other Assets and Other, net		1	1	1
Operating Income	312	279	625	553
Total other income and expenses	32	20	54	44
Interest Expense	90	78	175	147
Income Before Income Taxes	254	221	504	450
Income Tax Expense	35	6	70	25
Comprehensive Income	219	215	434	425
Net Income Attributable to Duke Energy Corporation	$ 219	$ 215	$ 434	$ 425

Condensed Consolidated Balanc_7

Condensed Consolidated Balance Sheets - Duke Energy Progress - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Current Assets
Cash and cash equivalents	$ 428	$ 343
Receivables of VIEs (net of allowance for doubtful accounts)	3,021	2,437
Receivables (net of allowance for doubtful accounts)	907	1,173
Inventory	3,208	3,199
Regulatory assets (includes amounts related to VIEs)	2,834	2,150
Other (includes amounts related to VIEs)	1,163	638
Total current assets	11,561	9,940
Property, Plant and Equipment
Cost	166,004	161,819
Accumulated depreciation and amortization	(52,252)	(50,555)
Facilities to be retired, net	99	144
Net property, plant and equipment	113,851	111,408
Other Noncurrent Assets
Regulatory assets (includes amounts related to VIEs)	12,863	12,487
Nuclear decommissioning trust funds	8,574	10,401
Operating lease right-of-use assets, net	1,222	1,266
Other (includes amounts related to VIEs)	4,026	3,812
Total other noncurrent assets	46,971	48,239
Total Assets	172,383	169,587
Current Liabilities
Accounts payable	3,971	3,629
Taxes accrued	682	749
Interest accrued	554	533
Current maturities of long-term debt (includes amounts related to VIEs)	3,171	3,387
Asset retirement obligations	649	647
Regulatory liabilities	1,383	1,211
Other	2,259	2,471
Total current liabilities	16,544	15,931
Long-Term Debt (includes amounts related to VIEs)	63,147	60,448
Other Noncurrent Liabilities
Deferred income taxes	9,948	9,379
Asset retirement obligations	12,080	12,129
Regulatory liabilities	14,519	16,152
Operating lease liabilities	1,039	1,074
Accrued pension and other post-retirement benefit costs	799	855
Investment tax credits	855	833
Other (includes amounts related to VIEs)	1,868	1,650
Total other noncurrent liabilities	41,108	42,072
Commitments and Contingencies
Equity
Total Liabilities and Equity	172,383	169,587
Duke Energy Progress
Current Assets
Cash and cash equivalents	75	35
Receivables of VIEs (net of allowance for doubtful accounts)	63	127
Receivables (net of allowance for doubtful accounts)	705	574
Receivables from affiliated companies	20	65
Notes receivable from affiliated companies	154
Inventory	948	921
Regulatory assets (includes amounts related to VIEs)	621	533
Other (includes amounts related to VIEs)	123	83
Total current assets	2,709	2,338
Property, Plant and Equipment
Cost	37,885	37,018
Accumulated depreciation and amortization	(13,977)	(13,387)
Facilities to be retired, net		26
Net property, plant and equipment	23,908	23,657
Other Noncurrent Assets
Regulatory assets (includes amounts related to VIEs)	4,161	4,118
Nuclear decommissioning trust funds	3,374	4,089
Operating lease right-of-use assets, net	397	389
Other (includes amounts related to VIEs)	787	792
Total other noncurrent assets	8,719	9,388
Total Assets	35,336	35,383
Current Liabilities
Accounts payable	469	476
Accounts payable to affiliated companies	342	310
Notes payable to affiliated companies		172
Taxes accrued	114	163
Interest accrued	101	96
Current maturities of long-term debt (includes amounts related to VIEs)	66	556
Asset retirement obligations	261	274
Regulatory liabilities	342	381
Other	425	448
Total current liabilities	2,120	2,876
Long-Term Debt (includes amounts related to VIEs)	10,446	9,543
Long-Term Debt Payable to Affiliated Companies	150	150
Other Noncurrent Liabilities
Deferred income taxes	2,323	2,208
Asset retirement obligations	5,414	5,401
Regulatory liabilities	4,342	4,868
Operating lease liabilities	365	350
Accrued pension and other post-retirement benefit costs	215	221
Investment tax credits	126	128
Other (includes amounts related to VIEs)	100	87
Total other noncurrent liabilities	12,885	13,263
Commitments and Contingencies
Equity
Total equity	9,735	9,551
Total Liabilities and Equity	$ 35,336	$ 35,383

Condensed Consolidated Balanc_8

Condensed Consolidated Balance Sheets - Duke Energy Progress (Parenthetical) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Allowance for doubtful accounts - receivables	$ 44	$ 46
Regulatory assets (includes amounts related to VIEs)	2,834	2,150
Current Assets: Other	1,163	638
Regulatory assets (includes amounts related to VIEs)	12,863	12,487
Current maturities of long-term debt (includes amounts related to VIEs)	3,171	3,387
Long-Term Debt	63,147	60,448
Variable Interest Entity
Allowance for doubtful accounts - receivables of VIEs	92	76
Regulatory assets (includes amounts related to VIEs)	105	105
Current Assets: Other	284	256
Regulatory assets (includes amounts related to VIEs)	1,774	1,823
Current maturities of long-term debt (includes amounts related to VIEs)	633	243
Long-Term Debt	4,435	4,854
Duke Energy Progress
Allowance for doubtful accounts - receivables	4	4
Regulatory assets (includes amounts related to VIEs)	621	533
Current Assets: Other	123	83
Regulatory assets (includes amounts related to VIEs)	4,161	4,118
Current maturities of long-term debt (includes amounts related to VIEs)	66	556
Long-Term Debt	10,446	9,543
Duke Energy Progress | Variable Interest Entity
Allowance for doubtful accounts - receivables of VIEs	27	17
Regulatory assets (includes amounts related to VIEs)	39	39
Current Assets: Other	26
Regulatory assets (includes amounts related to VIEs)	701	720
Current maturities of long-term debt (includes amounts related to VIEs)	32	15
Long-Term Debt	$ 1,130	$ 1,097

Condensed Consolidated State_13

Condensed Consolidated Statements of Cash Flows - Duke Energy Progress - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
CASH FLOWS FROM OPERATING ACTIVITIES
Net Income Attributable to Duke Energy Corporation	$ 1,764	$ 1,757
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion (including amortization of nuclear fuel)	2,923	2,753
Equity component of AFUDC	(99)	(83)
Impairment of assets and other charges	206	131
Deferred income taxes	67	119
Payments for asset retirement obligations	(255)	(263)
Provision for rate refunds	(65)	(13)
(Increase) decrease in
Net realized and unrealized mark-to-market and hedging transactions	351	15
Receivables	(180)	85
Inventory	(12)	153
Other current assets	(1,144)	(297)
Increase (decrease) in
Accounts payable	408	(297)
Taxes accrued	(49)	219
Other current liabilities	99	(326)
Other assets	55	77
Other liabilities	91	(47)
Net cash provided by operating activities	4,035	3,873
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(5,117)	(4,636)
Purchases of debt and equity securities	(2,184)	(3,182)
Proceeds from sales and maturities of debt and equity securities	2,225	3,217
Other	(384)	(137)
Net cash used in investing activities	(5,492)	(5,614)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from the issuance of long-term debt	5,714	4,627
Payments for the redemption of long-term debt	(3,147)	(2,002)
Other	(101)	(72)
Net cash provided by financing activities	1,576	1,750
Net increase in cash, cash equivalents and restricted cash	119	9
Cash, cash equivalents and restricted cash at beginning of period	520	556
Cash, cash equivalents and restricted cash at end of period	639	565
Significant non-cash transactions:
Accrued capital expenditures	1,264	990
Duke Energy Progress
CASH FLOWS FROM OPERATING ACTIVITIES
Net Income Attributable to Duke Energy Corporation	434	425
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion (including amortization of nuclear fuel)	672	610
Equity component of AFUDC	(22)	(15)
Impairment of assets and other charges	4	18
Deferred income taxes	32	28
Payments for asset retirement obligations	(90)	(88)
Provision for rate refunds	(30)	(7)
(Increase) decrease in
Net realized and unrealized mark-to-market and hedging transactions	314	9
Receivables	(25)	31
Receivables from affiliated companies	63	(13)
Inventory	(27)	52
Other current assets	(83)	(52)
Increase (decrease) in
Accounts payable	(7)	28
Accounts payable to affiliated companies	32	(1)
Taxes accrued	(49)	2
Other current liabilities	(9)	(45)
Other assets	(75)	(40)
Other liabilities	9	(43)
Net cash provided by operating activities	1,143	899
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(926)	(869)
Purchases of debt and equity securities	(887)	(926)
Proceeds from sales and maturities of debt and equity securities	882	915
Notes receivable from affiliated companies	(154)
Other	22	(2)
Net cash used in investing activities	(1,063)	(882)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from the issuance of long-term debt	939	19
Payments for the redemption of long-term debt	(530)	(3)
Notes receivable from affiliated companies	(172)	(25)
Distributions to parent	(250)
Other	(1)	(1)
Net cash provided by financing activities	(14)	(10)
Net increase in cash, cash equivalents and restricted cash	66	7
Cash, cash equivalents and restricted cash at beginning of period	39	39
Cash, cash equivalents and restricted cash at end of period	105	46
Significant non-cash transactions:
Accrued capital expenditures	$ 158	$ 97

Condensed Consolidated State_14

Condensed Consolidated Statements of Changes in Equity - Duke Energy Progress - USD ($) $ in Millions	Total	Duke Energy Progress	Duke Energy Progress Member's Equity
Beginning Balance (member's equity) at Dec. 31, 2020			$ 9,260
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income Attributable to Duke Energy Corporation	$ 1,757	$ 425	425
Common stock dividends	(1,488)
Other	0
Ending Balance (member's equity) at Jun. 30, 2021			9,685
Beginning Balance (member's equity) at Mar. 31, 2021			9,470
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income Attributable to Duke Energy Corporation	765	215	215
Common stock dividends	(744)
Ending Balance (member's equity) at Jun. 30, 2021			9,685
Beginning Balance (member's equity) at Dec. 31, 2021		9,551	9,551
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income Attributable to Duke Energy Corporation	1,764	434	434
Common stock dividends	(1,521)		(250)
Other	1
Ending Balance (member's equity) at Jun. 30, 2022		9,735	9,735
Beginning Balance (member's equity) at Mar. 31, 2022			9,517
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income Attributable to Duke Energy Corporation	907	219	219
Common stock dividends	(761)
Other	$ 1		(1)
Ending Balance (member's equity) at Jun. 30, 2022		$ 9,735	$ 9,735

Condensed Consolidated State_15

Condensed Consolidated Statements of Operations and Comprehensive Income - Duke Energy Florida - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Operating Revenues		$ 6,685	$ 5,758	$ 13,817	$ 11,908
Operating Expenses
Operation, maintenance and other		1,447	1,410	3,077	2,812
Depreciation and amortization		1,302	1,207	2,622	2,433
Property and other taxes		379	349	771	702
Impairment of assets and other charges		(9)	131	206	131
Gains on Sales of Other Assets and Other, net		8	2	10	2
Total operating expenses		5,280	4,591	11,135	9,291
Operating Income		1,413	1,169	2,692	2,619
Total other income and expenses		151	137	265	247
Interest Expense		607	572	1,194	1,107
Income Before Income Taxes		957	734	1,763	1,759
Income Tax Expense		77	36	63	120
Net Income Attributable to Duke Energy Corporation		907	765	1,764	1,757
Unrealized (losses) gains on available-for-sale securities	[1]	(8)	4	(21)	(4)
Comprehensive income		1,038	677	1,994	1,688
Duke Energy Florida
Operating Revenues		1,628	1,325	2,983	2,426
Operating Expenses
Fuel used in electric generation and purchased power/Cost of natural gas		665	424	1,155	783
Operation, maintenance and other		241	255	490	497
Depreciation and amortization		237	205	468	405
Property and other taxes		109	92	212	185
Impairment of assets and other charges			19		19
Gains on Sales of Other Assets and Other, net		1		2
Total operating expenses		1,252	995	2,325	1,889
Operating Income		377	330	660	537
Total other income and expenses		40	18	55	36
Interest Expense		90	80	174	160
Income Before Income Taxes		327	268	541	413
Income Tax Expense		66	51	109	79
Net Income Attributable to Duke Energy Corporation		261	217	432	334
Unrealized (losses) gains on available-for-sale securities		(1)	1	(2)
Comprehensive income		$ 260	$ 218	$ 430	$ 334
[1]Net of income tax impacts of approximately $40 million and $27 million for the three months ended June 30, 2022, and 2021, respectively, and $72 million and $19 million for the six months ended June 30, 2022, and 2021, respectively.

Condensed Consolidated Balanc_9

Condensed Consolidated Balance Sheets - Duke Energy Florida - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Current Assets
Cash and cash equivalents	$ 428	$ 343
Receivables of VIEs (net of allowance for doubtful accounts)	3,021	2,437
Receivables (net of allowance for doubtful accounts)	907	1,173
Inventory	3,208	3,199
Regulatory assets (includes amounts related to VIEs)	2,834	2,150
Other (includes amounts related to VIEs)	1,163	638
Total current assets	11,561	9,940
Property, Plant and Equipment
Cost	166,004	161,819
Accumulated depreciation and amortization	(52,252)	(50,555)
Net property, plant and equipment	113,851	111,408
Other Noncurrent Assets
Regulatory assets (includes amounts related to VIEs)	12,863	12,487
Nuclear decommissioning trust funds	8,574	10,401
Operating lease right-of-use assets, net	1,222	1,266
Other (includes amounts related to VIEs)	4,026	3,812
Total other noncurrent assets	46,971	48,239
Total Assets	172,383	169,587
Current Liabilities
Accounts payable	3,971	3,629
Taxes accrued	682	749
Interest accrued	554	533
Current maturities of long-term debt (includes amounts related to VIEs)	3,171	3,387
Asset retirement obligations	649	647
Regulatory liabilities	1,383	1,211
Other	2,259	2,471
Total current liabilities	16,544	15,931
Long-Term Debt (includes amounts related to VIEs)	63,147	60,448
Other Noncurrent Liabilities
Deferred income taxes	9,948	9,379
Asset retirement obligations	12,080	12,129
Regulatory liabilities	14,519	16,152
Operating lease liabilities	1,039	1,074
Accrued pension and other post-retirement benefit costs	799	855
Other (includes amounts related to VIEs)	1,868	1,650
Total other noncurrent liabilities	41,108	42,072
Commitments and Contingencies
Equity
Accumulated other comprehensive loss	(73)	(303)
Total Liabilities and Equity	172,383	169,587
Duke Energy Florida
Current Assets
Cash and cash equivalents	44	23
Receivables of VIEs (net of allowance for doubtful accounts)	126	117
Receivables (net of allowance for doubtful accounts)	647	432
Receivables from affiliated companies	5	16
Inventory	478	477
Regulatory assets (includes amounts related to VIEs)	785	497
Other (includes amounts related to VIEs)	58	80
Total current assets	2,143	1,642
Property, Plant and Equipment
Cost	24,714	23,865
Accumulated depreciation and amortization	(6,097)	(5,819)
Net property, plant and equipment	18,617	18,046
Other Noncurrent Assets
Regulatory assets (includes amounts related to VIEs)	1,920	1,791
Nuclear decommissioning trust funds	470	553
Operating lease right-of-use assets, net	280	302
Other (includes amounts related to VIEs)	407	399
Total other noncurrent assets	3,077	3,045
Total Assets	23,837	22,733
Current Liabilities
Accounts payable	750	623
Accounts payable to affiliated companies	147	209
Notes payable to affiliated companies	504	199
Taxes accrued	186	51
Interest accrued	72	68
Current maturities of long-term debt (includes amounts related to VIEs)	327	76
Asset retirement obligations	1	1
Regulatory liabilities	238	98
Other	394	408
Total current liabilities	2,619	1,733
Long-Term Debt (includes amounts related to VIEs)	8,120	8,406
Other Noncurrent Liabilities
Deferred income taxes	2,506	2,434
Asset retirement obligations	392	436
Regulatory liabilities	752	698
Operating lease liabilities	235	256
Accrued pension and other post-retirement benefit costs	155	166
Other (includes amounts related to VIEs)	333	309
Total other noncurrent liabilities	4,373	4,299
Commitments and Contingencies
Equity
Member's equity	8,730	8,298
Accumulated other comprehensive loss	(5)	(3)
Total equity	8,725	8,295
Total Liabilities and Equity	$ 23,837	$ 22,733

Condensed Consolidated Balan_10

Condensed Consolidated Balance Sheets - Duke Energy Florida (Parenthetical) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Allowance for doubtful accounts - receivables	$ 44	$ 46
Regulatory assets (includes amounts related to VIEs)	2,834	2,150
Current Assets: Other	1,163	638
Regulatory assets (includes amounts related to VIEs)	12,863	12,487
Current maturities of long-term debt (includes amounts related to VIEs)	3,171	3,387
Long-Term Debt	63,147	60,448
Variable Interest Entity
Allowance for doubtful accounts - receivables of VIEs	92	76
Regulatory assets (includes amounts related to VIEs)	105	105
Current Assets: Other	284	256
Regulatory assets (includes amounts related to VIEs)	1,774	1,823
Current maturities of long-term debt (includes amounts related to VIEs)	633	243
Long-Term Debt	4,435	4,854
Duke Energy Florida
Allowance for doubtful accounts - receivables	8	8
Regulatory assets (includes amounts related to VIEs)	785	497
Current Assets: Other	58	80
Regulatory assets (includes amounts related to VIEs)	1,920	1,791
Current maturities of long-term debt (includes amounts related to VIEs)	327	76
Long-Term Debt	8,120	8,406
Duke Energy Florida | Variable Interest Entity
Allowance for doubtful accounts - receivables of VIEs	13	8
Regulatory assets (includes amounts related to VIEs)	54	54
Current Assets: Other	33	39
Regulatory assets (includes amounts related to VIEs)	859	883
Current maturities of long-term debt (includes amounts related to VIEs)	306	56
Long-Term Debt	$ 916	$ 1,196

Condensed Consolidated State_16

Condensed Consolidated Statements of Cash Flows - Duke Energy Florida - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
CASH FLOWS FROM OPERATING ACTIVITIES
Net Income Attributable to Duke Energy Corporation	$ 1,764	$ 1,757
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion (including amortization of nuclear fuel)	2,923	2,753
Equity component of AFUDC	(99)	(83)
Impairment of assets and other charges	206	131
Deferred income taxes	67	119
Payments for asset retirement obligations	(255)	(263)
Provision for rate refunds	(65)	(13)
(Increase) decrease in
Net realized and unrealized mark-to-market and hedging transactions	351	15
Receivables	(180)	85
Inventory	(12)	153
Other current assets	(1,144)	(297)
Increase (decrease) in
Accounts payable	408	(297)
Taxes accrued	(49)	219
Other current liabilities	99	(326)
Other assets	55	77
Other liabilities	91	(47)
Net cash provided by operating activities	4,035	3,873
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(5,117)	(4,636)
Purchases of debt and equity securities	(2,184)	(3,182)
Proceeds from sales and maturities of debt and equity securities	2,225	3,217
Other	(384)	(137)
Net cash used in investing activities	(5,492)	(5,614)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from the issuance of long-term debt	5,714	4,627
Payments for the redemption of long-term debt	(3,147)	(2,002)
Other	(101)	(72)
Net cash provided by financing activities	1,576	1,750
Net increase in cash, cash equivalents and restricted cash	119	9
Cash, cash equivalents and restricted cash at beginning of period	520	556
Cash, cash equivalents and restricted cash at end of period	639	565
Significant non-cash transactions:
Accrued capital expenditures	1,264	990
Duke Energy Florida
CASH FLOWS FROM OPERATING ACTIVITIES
Net Income Attributable to Duke Energy Corporation	432	334
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion (including amortization of nuclear fuel)	535	491
Equity component of AFUDC	(10)	(8)
Impairment of assets and other charges		19
Deferred income taxes	66	130
Payments for asset retirement obligations	(47)	(52)
(Increase) decrease in
Net realized and unrealized mark-to-market and hedging transactions		5
Receivables	(222)	(42)
Receivables from affiliated companies	11	(5)
Inventory	(4)	24
Other current assets	(307)	(132)
Increase (decrease) in
Accounts payable	168	15
Accounts payable to affiliated companies	(62)	44
Taxes accrued	134	62
Other current liabilities	87	(35)
Other assets	(3)	11
Other liabilities	(11)	(94)
Net cash provided by operating activities	767	767
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(1,018)	(876)
Purchases of debt and equity securities	(109)	(234)
Proceeds from sales and maturities of debt and equity securities	151	286
Other	(43)	(67)
Net cash used in investing activities	(1,019)	(891)
CASH FLOWS FROM FINANCING ACTIVITIES
Payments for the redemption of long-term debt	(39)	(38)
Notes receivable from affiliated companies	306	167
Net cash provided by financing activities	267	129
Net increase in cash, cash equivalents and restricted cash	15	5
Cash, cash equivalents and restricted cash at beginning of period	62	50
Cash, cash equivalents and restricted cash at end of period	77	55
Significant non-cash transactions:
Accrued capital expenditures	$ 297	$ 232

Condensed Consolidated State_17

Condensed Consolidated Statements of Changes in Equity - Duke Energy Florida - USD ($) $ in Millions	Total		Accumulated Other Comprehensive (Loss) Income, Net Unrealized (Losses) Gains on Available-for-Sale-Securities	Duke Energy Florida	Duke Energy Florida Member's Equity	Duke Energy Florida Accumulated Other Comprehensive (Loss) Income, Net Unrealized (Losses) Gains on Available-for-Sale-Securities
Beginning Balance (member's equity) at Dec. 31, 2020				$ 7,558	$ 7,560	$ (2)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income Attributable to Duke Energy Corporation	$ 1,757			334	334
Other comprehensive (loss) income	(63)	[1]	$ (4)
Other	0			(1)	(1)
Ending Balance (member's equity) at Jun. 30, 2021				7,891	7,893	(2)
Beginning Balance (member's equity) at Mar. 31, 2021				7,674	7,677	(3)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income Attributable to Duke Energy Corporation	765			217	217
Other comprehensive (loss) income	(89)	[1]	4	1		1
Other				(1)	(1)
Ending Balance (member's equity) at Jun. 30, 2021				7,891	7,893	(2)
Beginning Balance (member's equity) at Dec. 31, 2021				8,295	8,298	(3)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income Attributable to Duke Energy Corporation	1,764			432	432
Other comprehensive (loss) income	242	[1]	(21)	(2)		(2)
Other	1
Ending Balance (member's equity) at Jun. 30, 2022				8,725	8,730	(5)
Beginning Balance (member's equity) at Mar. 31, 2022				8,465	8,469	(4)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income Attributable to Duke Energy Corporation	907			261	261
Other comprehensive (loss) income	135	[1]	$ (8)	(1)		(1)
Other	$ 1
Ending Balance (member's equity) at Jun. 30, 2022				$ 8,725	$ 8,730	$ (5)
[1]Net of income tax impacts of approximately $40 million and $27 million for the three months ended June 30, 2022, and 2021, respectively, and $72 million and $19 million for the six months ended June 30, 2022, and 2021, respectively.

Condensed Consolidated State_18

Condensed Consolidated Statements of Operations and Comprehensive Income - Duke Energy Ohio - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Regulated electric	$ 425	$ 302	$ 1,427	$ 1,051
Regulated natural gas	6,074	5,258	12,007	10,477
Total operating revenues	6,685	5,758	13,817	11,908
Operating Expenses
Operation, maintenance and other	1,447	1,410	3,077	2,812
Depreciation and amortization	1,302	1,207	2,622	2,433
Property and other taxes	379	349	771	702
Total operating expenses	5,280	4,591	11,135	9,291
Gains on Sales of Other Assets and Other, net	8	2	10	2
Operating Income	1,413	1,169	2,692	2,619
Total other income and expenses	151	137	265	247
Interest Expense	607	572	1,194	1,107
Income Before Income Taxes	957	734	1,763	1,759
Income Tax Expense	77	36	63	120
Comprehensive Income	1,038	677	1,994	1,688
Net Income Attributable to Duke Energy Corporation	907	765	1,764	1,757
Fuel used in electric generation and purchased power
Operating Expenses
Fuel used in electric generation and purchased power/Cost of natural gas	1,972	1,415	3,789	2,858
Cost of natural gas
Operating Expenses
Fuel used in electric generation and purchased power/Cost of natural gas	189	79	670	355
Duke Energy Ohio
Regulated electric	144	113	370	282
Regulated natural gas	401	343	813	706
Total operating revenues	545	456	1,183	988
Operating Expenses
Operation, maintenance and other	109	111	287	219
Depreciation and amortization	83	75	163	149
Property and other taxes	92	83	193	175
Total operating expenses	457	383	1,050	790
Gains on Sales of Other Assets and Other, net	1		1
Operating Income	89	73	134	198
Total other income and expenses	6	5	12	10
Interest Expense	30	28	60	53
Income Before Income Taxes	65	50	86	155
Income Tax Expense	9	11	(47)	25
Comprehensive Income	56	39	133	130
Net Income Attributable to Duke Energy Corporation	56	39	133	130
Duke Energy Ohio | Fuel used in electric generation and purchased power
Operating Expenses
Fuel used in electric generation and purchased power/Cost of natural gas	127	93	254	175
Duke Energy Ohio | Cost of natural gas
Operating Expenses
Fuel used in electric generation and purchased power/Cost of natural gas	$ 46	$ 16	$ 153	$ 67

Condensed Consolidated Balan_11

Condensed Consolidated Balance Sheets - Duke Energy Ohio - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Current Assets
Cash and cash equivalents	$ 428	$ 343
Receivables of VIEs (net of allowance for doubtful accounts)	3,021	2,437
Inventory	3,208	3,199
Regulatory assets (includes amounts related to VIEs)	2,834	2,150
Other (includes amounts related to VIEs)	1,163	638
Total current assets	11,561	9,940
Property, Plant and Equipment
Cost	166,004	161,819
Accumulated depreciation and amortization	(52,252)	(50,555)
Facilities to be retired, net	99	144
Net property, plant and equipment	113,851	111,408
Other Noncurrent Assets
Goodwill	19,303	19,303
Regulatory assets (includes amounts related to VIEs)	12,863	12,487
Operating lease right-of-use assets, net	1,222	1,266
Other (includes amounts related to VIEs)	4,026	3,812
Total other noncurrent assets	46,971	48,239
Total Assets	172,383	169,587
Current Liabilities
Accounts payable	3,971	3,629
Taxes accrued	682	749
Interest accrued	554	533
Asset retirement obligations	649	647
Regulatory liabilities	1,383	1,211
Other	2,259	2,471
Total current liabilities	16,544	15,931
Long-Term Debt (includes amounts related to VIEs)	63,147	60,448
Other Noncurrent Liabilities
Deferred income taxes	9,948	9,379
Asset retirement obligations	12,080	12,129
Regulatory liabilities	14,519	16,152
Operating lease liabilities	1,039	1,074
Accrued pension and other post-retirement benefit costs	799	855
Other (includes amounts related to VIEs)	1,868	1,650
Total other noncurrent liabilities	41,108	42,072
Commitments and Contingencies
Equity
Common stock	1	1
Additional paid-in capital	44,373	44,371
Retained earnings	3,457	3,265
Total Duke Energy Corporation stockholders' equity	49,720	49,296
Total Liabilities and Equity	172,383	169,587
Duke Energy Ohio
Current Assets
Cash and cash equivalents	15	13
Receivables of VIEs (net of allowance for doubtful accounts)	83	96
Receivables from affiliated companies	177	122
Notes receivable from affiliated companies		15
Inventory	112	116
Regulatory assets (includes amounts related to VIEs)	59	72
Other (includes amounts related to VIEs)	64	57
Total current assets	510	491
Property, Plant and Equipment
Cost	12,033	11,725
Accumulated depreciation and amortization	(3,167)	(3,106)
Facilities to be retired, net		6
Net property, plant and equipment	8,866	8,625
Other Noncurrent Assets
Goodwill	920	920
Regulatory assets (includes amounts related to VIEs)	613	635
Operating lease right-of-use assets, net	18	19
Other (includes amounts related to VIEs)	88	84
Total other noncurrent assets	1,639	1,658
Total Assets	11,015	10,774
Current Liabilities
Accounts payable	379	348
Accounts payable to affiliated companies	58	64
Notes payable to affiliated companies	301	103
Taxes accrued	180	275
Interest accrued	31	30
Asset retirement obligations	12	13
Regulatory liabilities	76	62
Other	112	82
Total current liabilities	1,149	977
Long-Term Debt (includes amounts related to VIEs)	3,218	3,168
Long-Term Debt Payable to Affiliated Companies	25	25
Other Noncurrent Liabilities
Deferred income taxes	1,095	1,050
Asset retirement obligations	125	123
Regulatory liabilities	580	739
Operating lease liabilities	18	18
Accrued pension and other post-retirement benefit costs	108	109
Other (includes amounts related to VIEs)	100	101
Total other noncurrent liabilities	2,026	2,140
Commitments and Contingencies
Equity
Common stock	762	762
Additional paid-in capital	3,100	3,100
Retained earnings	735	602
Total Duke Energy Corporation stockholders' equity	4,597	4,464
Total Liabilities and Equity	$ 11,015	$ 10,774

Condensed Consolidated Balan_12

Condensed Consolidated Balance Sheets - Duke Energy Ohio (Parenthetical) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Allowance for doubtful accounts - receivables	$ 44	$ 46
Common stock, par value (in usd per share)	$ 0.001	$ 0.001
Common stock, shares authorized (in shares)	2,000,000,000	2,000,000,000
Common stock, shares outstanding (in shares)	770,000,000	769,000,000
Duke Energy Ohio
Allowance for doubtful accounts - receivables	$ 4	$ 4
Common stock, par value (in usd per share)	$ 8.50	$ 8.50
Common stock, shares authorized (in shares)	120,000,000	120,000,000
Common stock, shares outstanding (in shares)	90,000,000	90,000,000

Condensed Consolidated State_19

Condensed Consolidated Statements of Cash Flows - Duke Energy Ohio - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
CASH FLOWS FROM OPERATING ACTIVITIES
Net Income Attributable to Duke Energy Corporation	$ 1,764	$ 1,757
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion (including amortization of nuclear fuel)	2,923	2,753
Equity component of AFUDC	(99)	(83)
Impairment of assets and other charges	206	131
Deferred income taxes	67	119
Payments for asset retirement obligations	(255)	(263)
Provision for rate refunds	(65)	(13)
(Increase) decrease in
Net realized and unrealized mark-to-market and hedging transactions	351	15
Receivables	(180)	85
Inventory	(12)	153
Other current assets	(1,144)	(297)
Increase (decrease) in
Accounts payable	408	(297)
Taxes accrued	(49)	219
Other current liabilities	99	(326)
Other assets	55	77
Other liabilities	91	(47)
Net cash provided by operating activities	4,035	3,873
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(5,117)	(4,636)
Other	(384)	(137)
Net cash used in investing activities	(5,492)	(5,614)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from the issuance of long-term debt	5,714	4,627
Other	(101)	(72)
Net cash provided by financing activities	1,576	1,750
Net increase in cash, cash equivalents and restricted cash	119	9
Cash, cash equivalents and restricted cash at beginning of period	520	556
Cash, cash equivalents and restricted cash at end of period	639	565
Significant non-cash transactions:
Accrued capital expenditures	1,264	990
Duke Energy Ohio
CASH FLOWS FROM OPERATING ACTIVITIES
Net Income Attributable to Duke Energy Corporation	133	130
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion (including amortization of nuclear fuel)	165	151
Equity component of AFUDC	(6)	(4)
Impairment of assets and other charges		5
Deferred income taxes	(41)	17
Payments for asset retirement obligations	(1)	(1)
Provision for rate refunds	5	8
(Increase) decrease in
Net realized and unrealized mark-to-market and hedging transactions		(1)
Receivables	13	2
Receivables from affiliated companies	(3)	(11)
Inventory	3	(1)
Other current assets	13	(12)
Increase (decrease) in
Accounts payable	57	(8)
Accounts payable to affiliated companies		4
Taxes accrued	(95)	(58)
Other current liabilities	(47)	(7)
Other assets	(46)	(33)
Other liabilities	72	4
Net cash provided by operating activities	222	185
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(406)	(415)
Notes receivable from affiliated companies	(37)	30
Other	(25)	(23)
Net cash used in investing activities	(468)	(408)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from the issuance of long-term debt	50
Notes receivable from affiliated companies	199	221
Other	(1)
Net cash provided by financing activities	248	221
Net increase in cash, cash equivalents and restricted cash	2	(2)
Cash, cash equivalents and restricted cash at beginning of period	13	14
Cash, cash equivalents and restricted cash at end of period	15	12
Significant non-cash transactions:
Accrued capital expenditures	$ 102	$ 88

Condensed Consolidated State_20

Condensed Consolidated Statements of Changes in Equity - Duke Energy Ohio - USD ($) $ in Millions	Total	Additional Paid-in Capital	Retained Earnings	Duke Energy Ohio	Duke Energy Ohio Common Stock	Duke Energy Ohio Additional Paid-in Capital	Duke Energy Ohio Retained Earnings
Beginning Balance (parent) at Dec. 31, 2020				$ 3,935	$ 762	$ 2,776	$ 397
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income Attributable to Duke Energy Corporation	$ 1,757			130			130
Other	0	$ 1	$ 0
Ending Balance (parent) at Jun. 30, 2021				4,065	762	2,776	527
Beginning Balance (parent) at Mar. 31, 2021				4,026	762	2,776	488
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income Attributable to Duke Energy Corporation	765			39			39
Other		1
Ending Balance (parent) at Jun. 30, 2021				4,065	762	2,776	527
Beginning Balance (parent) at Dec. 31, 2021	49,296			4,464	762	3,100	602
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income Attributable to Duke Energy Corporation	1,764			133			133
Other	1	(1)	2
Ending Balance (parent) at Jun. 30, 2022	49,720			4,597	762	3,100	735
Beginning Balance (parent) at Mar. 31, 2022				4,542	762	3,100	680
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income Attributable to Duke Energy Corporation	907			56			56
Other	1	$ (1)	$ 2	(1)			(1)
Ending Balance (parent) at Jun. 30, 2022	$ 49,720			$ 4,597	$ 762	$ 3,100	$ 735

Condensed Consolidated State_21

Condensed Consolidated Statements of Operations and Comprehensive Income - Duke Energy Indiana - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Operating Revenues	$ 6,685	$ 5,758	$ 13,817	$ 11,908
Operating Expenses
Operation, maintenance and other	1,447	1,410	3,077	2,812
Depreciation and amortization	1,302	1,207	2,622	2,433
Property and other taxes	379	349	771	702
Impairment of assets and other charges	(9)	131	206	131
Total operating expenses	5,280	4,591	11,135	9,291
Gains on Sales of Other Assets and Other, net	8	2	10	2
Operating Income	1,413	1,169	2,692	2,619
Total other income and expenses	151	137	265	247
Interest Expense	607	572	1,194	1,107
Income Before Income Taxes	957	734	1,763	1,759
Income Tax Expense	77	36	63	120
Comprehensive Income	1,038	677	1,994	1,688
Net Income Attributable to Duke Energy Corporation	907	765	1,764	1,757
Duke Energy Indiana
Operating Revenues	918	735	1,740	1,480
Operating Expenses
Fuel used in electric generation and purchased power/Cost of natural gas	359	201	678	418
Operation, maintenance and other	182	192	374	370
Depreciation and amortization	155	152	311	304
Property and other taxes	22	20	47	41
Impairment of assets and other charges		8	211	8
Total operating expenses	718	573	1,621	1,141
Gains on Sales of Other Assets and Other, net	0	(1)		(1)
Operating Income	200	161	119	338
Total other income and expenses	8	10	18	19
Interest Expense	45	49	90	99
Income Before Income Taxes	163	122	47	258
Income Tax Expense	14	19	(23)	43
Comprehensive Income	149	103	70	215
Net Income Attributable to Duke Energy Corporation	$ 149	$ 103	$ 70	$ 215

Condensed Consolidated Balan_13

Condensed Consolidated Balance Sheets - Duke Energy Indiana - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Current Assets
Cash and cash equivalents	$ 428	$ 343
Receivables of VIEs (net of allowance for doubtful accounts)	3,021	2,437
Inventory	3,208	3,199
Regulatory assets (includes amounts related to VIEs)	2,834	2,150
Other (includes amounts related to VIEs)	1,163	638
Total current assets	11,561	9,940
Property, Plant and Equipment
Cost	166,004	161,819
Accumulated depreciation and amortization	(52,252)	(50,555)
Net property, plant and equipment	113,851	111,408
Other Noncurrent Assets
Regulatory assets (includes amounts related to VIEs)	12,863	12,487
Operating lease right-of-use assets, net	1,222	1,266
Other (includes amounts related to VIEs)	4,026	3,812
Total other noncurrent assets	46,971	48,239
Total Assets	172,383	169,587
Current Liabilities
Accounts payable	3,971	3,629
Taxes accrued	682	749
Interest accrued	554	533
Current maturities of long-term debt (includes amounts related to VIEs)	3,171	3,387
Asset retirement obligations	649	647
Regulatory liabilities	1,383	1,211
Other	2,259	2,471
Total current liabilities	16,544	15,931
Long-Term Debt (includes amounts related to VIEs)	63,147	60,448
Other Noncurrent Liabilities
Deferred income taxes	9,948	9,379
Asset retirement obligations	12,080	12,129
Regulatory liabilities	14,519	16,152
Operating lease liabilities	1,039	1,074
Accrued pension and other post-retirement benefit costs	799	855
Investment tax credits	855	833
Other (includes amounts related to VIEs)	1,868	1,650
Total other noncurrent liabilities	41,108	42,072
Commitments and Contingencies
Equity
Total Liabilities and Equity	172,383	169,587
Duke Energy Indiana
Current Assets
Cash and cash equivalents	26	6
Receivables of VIEs (net of allowance for doubtful accounts)	85	100
Receivables from affiliated companies	221	98
Notes receivable from affiliated companies		134
Inventory	441	418
Regulatory assets (includes amounts related to VIEs)	373	277
Other (includes amounts related to VIEs)	237	68
Total current assets	1,383	1,101
Property, Plant and Equipment
Cost	17,709	17,343
Accumulated depreciation and amortization	(5,824)	(5,583)
Net property, plant and equipment	11,885	11,760
Other Noncurrent Assets
Regulatory assets (includes amounts related to VIEs)	1,092	1,278
Operating lease right-of-use assets, net	50	53
Other (includes amounts related to VIEs)	265	296
Total other noncurrent assets	1,407	1,627
Total Assets	14,675	14,488
Current Liabilities
Accounts payable	317	282
Accounts payable to affiliated companies	216	221
Notes payable to affiliated companies	275
Taxes accrued	76	73
Interest accrued	48	49
Current maturities of long-term debt (includes amounts related to VIEs)	31	84
Asset retirement obligations	122	110
Regulatory liabilities	178	127
Other	179	105
Total current liabilities	1,442	1,051
Long-Term Debt (includes amounts related to VIEs)	4,156	4,089
Long-Term Debt Payable to Affiliated Companies	150	150
Other Noncurrent Liabilities
Deferred income taxes	1,270	1,303
Asset retirement obligations	845	877
Regulatory liabilities	1,485	1,565
Operating lease liabilities	48	50
Accrued pension and other post-retirement benefit costs	167	167
Investment tax credits	176	177
Other (includes amounts related to VIEs)	75	44
Total other noncurrent liabilities	4,066	4,183
Commitments and Contingencies
Equity
Total equity	4,861	5,015
Total Liabilities and Equity	$ 14,675	$ 14,488

Condensed Consolidated Balan_14

Condensed Consolidated Balance Sheets - Duke Energy Indiana (Parenthetical) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Allowance for doubtful accounts - receivables	$ 44	$ 46
Duke Energy Indiana
Allowance for doubtful accounts - receivables	$ 3	$ 3

Condensed Consolidated State_22

Condensed Consolidated Statements of Cash Flows - Duke Energy Indiana - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
CASH FLOWS FROM OPERATING ACTIVITIES
Net Income Attributable to Duke Energy Corporation	$ 1,764	$ 1,757
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion (including amortization of nuclear fuel)	2,923	2,753
Equity component of AFUDC	(99)	(83)
Impairment of assets and other charges	206	131
Deferred income taxes	67	119
Payments for asset retirement obligations	(255)	(263)
(Increase) decrease in
Net realized and unrealized mark-to-market and hedging transactions	351	15
Receivables	(180)	85
Inventory	(12)	153
Other current assets	(1,144)	(297)
Increase (decrease) in
Accounts payable	408	(297)
Taxes accrued	(49)	219
Other current liabilities	99	(326)
Other assets	55	77
Other liabilities	91	(47)
Net cash provided by operating activities	4,035	3,873
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(5,117)	(4,636)
Payments to Acquire Investments	(2,184)	(3,182)
Proceeds from sales and maturities of debt and equity securities	2,225	3,217
Other	(384)	(137)
Net cash used in investing activities	(5,492)	(5,614)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from the issuance of long-term debt	5,714	4,627
Payments for the redemption of long-term debt	(3,147)	(2,002)
Other	(101)	(72)
Net cash provided by financing activities	1,576	1,750
Net increase in cash, cash equivalents and restricted cash	119	9
Cash, cash equivalents and restricted cash at beginning of period	520	556
Cash, cash equivalents and restricted cash at end of period	639	565
Significant non-cash transactions:
Accrued capital expenditures	1,264	990
Duke Energy Indiana
CASH FLOWS FROM OPERATING ACTIVITIES
Net Income Attributable to Duke Energy Corporation	70	215
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion (including amortization of nuclear fuel)	312	306
Equity component of AFUDC	(10)	(12)
Impairment of assets and other charges	212	8
Deferred income taxes	(80)	1
Payments for asset retirement obligations	(31)	(30)
(Increase) decrease in
Net realized and unrealized mark-to-market and hedging transactions	(53)
Receivables	21	(15)
Receivables from affiliated companies	2	(8)
Inventory	(23)	61
Other current assets	(166)	(31)
Increase (decrease) in
Accounts payable	59	35
Accounts payable to affiliated companies	7	(29)
Taxes accrued	19	10
Other current liabilities	52	20
Other assets	(20)	(3)
Other liabilities	50	6
Net cash provided by operating activities	421	534
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(433)	(394)
Payments to Acquire Investments	(26)	(9)
Proceeds from sales and maturities of debt and equity securities	21	6
Notes receivable from affiliated companies	9	7
Other	(23)	(8)
Net cash used in investing activities	(452)	(398)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from the issuance of long-term debt	67
Payments for the redemption of long-term debt	(53)
Notes receivable from affiliated companies	275	(131)
Distributions to parent	(237)
Other	(1)
Net cash provided by financing activities	51	(131)
Net increase in cash, cash equivalents and restricted cash	20	5
Cash, cash equivalents and restricted cash at beginning of period	6	7
Cash, cash equivalents and restricted cash at end of period	26	12
Significant non-cash transactions:
Accrued capital expenditures	$ 94	$ 85

Condensed Consolidated State_23

Condensed Consolidated Statements of Changes in Equity - Duke Energy Indiana - USD ($) $ in Millions	Total	Duke Energy Indiana	Duke Energy Indiana Member's Equity
Beginning Balance (member's equity) at Dec. 31, 2020			$ 4,783
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income Attributable to Duke Energy Corporation	$ 1,757	$ 215	215
Distributions to parent	(1,488)
Other	0		1
Ending Balance (member's equity) at Jun. 30, 2021			4,999
Beginning Balance (member's equity) at Mar. 31, 2021			4,896
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income Attributable to Duke Energy Corporation	765	103	103
Distributions to parent	(744)
Ending Balance (member's equity) at Jun. 30, 2021			4,999
Beginning Balance (member's equity) at Dec. 31, 2021		5,015	5,015
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income Attributable to Duke Energy Corporation	1,764	70	70
Distributions to parent	(1,521)		(225)
Other	1		1
Ending Balance (member's equity) at Jun. 30, 2022		4,861	4,861
Beginning Balance (member's equity) at Mar. 31, 2022			4,824
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income Attributable to Duke Energy Corporation	907	149	149
Distributions to parent	(761)		(112)
Other	$ 1
Ending Balance (member's equity) at Jun. 30, 2022		$ 4,861	$ 4,861

Condensed Consolidated State_24

Condensed Consolidated Statements of Operations and Comprehensive Income - Piedmont - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Operating Revenues	$ 6,685	$ 5,758	$ 13,817	$ 11,908
Operating Expenses
Operation, maintenance and other	1,447	1,410	3,077	2,812
Depreciation and amortization	1,302	1,207	2,622	2,433
Property and other taxes	379	349	771	702
Impairment of assets and other charges	(9)	131	206	131
Total operating expenses	5,280	4,591	11,135	9,291
Gains on Sales of Other Assets and Other, net	8	2	10	2
Operating Income	1,413	1,169	2,692	2,619
Total other income and expenses	151	137	265	247
Interest Expense	607	572	1,194	1,107
Income Before Income Taxes	957	734	1,763	1,759
Income Tax Expense	77	36	63	120
Comprehensive Income	1,038	677	1,994	1,688
Net Income Attributable to Duke Energy Corporation	907	765	1,764	1,757
Piedmont
Operating Revenues	310	215	1,115	821
Operating Expenses
Fuel used in electric generation and purchased power/Cost of natural gas	143	63	517	288
Operation, maintenance and other	88	76	183	154
Depreciation and amortization	56	51	110	99
Property and other taxes	15	14	31	28
Impairment of assets and other charges		5		5
Total operating expenses	302	209	841	574
Gains on Sales of Other Assets and Other, net	4	0	4	0
Operating Income	12	6	278	247
Total other income and expenses	15	18	28	35
Interest Expense	34	30	66	59
Income Before Income Taxes	(7)	(6)	240	223
Income Tax Expense	(6)	(2)	27	24
Comprehensive Income	(1)	(4)	213	199
Net Income Attributable to Duke Energy Corporation	$ (1)	$ (4)	$ 213	$ 199

Condensed Consolidated Balan_15

Condensed Consolidated Balance Sheets - Piedmont - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Current Assets
Receivables of VIEs (net of allowance for doubtful accounts)	$ 3,021	$ 2,437
Inventory	3,208	3,199
Regulatory assets (includes amounts related to VIEs)	2,834	2,150
Other (includes amounts related to VIEs)	1,163	638
Total current assets	11,561	9,940
Property, Plant and Equipment
Cost	166,004	161,819
Accumulated depreciation and amortization	(52,252)	(50,555)
Facilities to be retired, net	99	144
Net property, plant and equipment	113,851	111,408
Other Noncurrent Assets
Goodwill	19,303	19,303
Regulatory assets (includes amounts related to VIEs)	12,863	12,487
Operating lease right-of-use assets, net	1,222	1,266
Investments in equity method unconsolidated affiliates	983	970
Other (includes amounts related to VIEs)	4,026	3,812
Total other noncurrent assets	46,971	48,239
Total Assets	172,383	169,587
Current Liabilities
Accounts payable	3,971	3,629
Taxes accrued	682	749
Interest accrued	554	533
Regulatory liabilities	1,383	1,211
Other	2,259	2,471
Total current liabilities	16,544	15,931
Long-Term Debt (includes amounts related to VIEs)	63,147	60,448
Other Noncurrent Liabilities
Deferred income taxes	9,948	9,379
Asset retirement obligations	12,080	12,129
Regulatory liabilities	14,519	16,152
Operating lease liabilities	1,039	1,074
Accrued pension and other post-retirement benefit costs	799	855
Other (includes amounts related to VIEs)	1,868	1,650
Total other noncurrent liabilities	41,108	42,072
Commitments and Contingencies
Equity
Common stock	1	1
Retained earnings	3,457	3,265
Total Duke Energy Corporation stockholders' equity	49,720	49,296
Total Liabilities and Equity	172,383	169,587
Piedmont
Current Assets
Receivables of VIEs (net of allowance for doubtful accounts)	150	318
Receivables from affiliated companies	11	11
Inventory	68	109
Regulatory assets (includes amounts related to VIEs)	154	141
Other (includes amounts related to VIEs)	61	9
Total current assets	444	588
Property, Plant and Equipment
Cost	10,317	9,918
Accumulated depreciation and amortization	(1,987)	(1,899)
Facilities to be retired, net	10	11
Net property, plant and equipment	8,340	8,030
Other Noncurrent Assets
Goodwill	49	49
Regulatory assets (includes amounts related to VIEs)	373	316
Operating lease right-of-use assets, net	14	16
Investments in equity method unconsolidated affiliates	79	95
Other (includes amounts related to VIEs)	324	288
Total other noncurrent assets	839	764
Total Assets	9,623	9,382
Current Liabilities
Accounts payable	254	196
Accounts payable to affiliated companies	44	40
Notes payable to affiliated companies	33	518
Taxes accrued	31	63
Interest accrued	39	37
Regulatory liabilities	89	56
Other	77	81
Total current liabilities	567	991
Long-Term Debt (includes amounts related to VIEs)	3,363	2,968
Other Noncurrent Liabilities
Deferred income taxes	846	815
Asset retirement obligations	23	22
Regulatory liabilities	1,038	1,058
Operating lease liabilities	12	14
Accrued pension and other post-retirement benefit costs	7	7
Other (includes amounts related to VIEs)	205	158
Total other noncurrent liabilities	2,131	2,074
Commitments and Contingencies
Equity
Common stock	1,635	1,635
Retained earnings	1,927	1,714
Total Duke Energy Corporation stockholders' equity	3,562	3,349
Total Liabilities and Equity	$ 9,623	$ 9,382

Condensed Consolidated Balan_16

Condensed Consolidated Balance Sheets - Piedmont (Parenthetical) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Allowance for doubtful accounts - receivables	$ 44	$ 46
Common stock, shares authorized (in shares)	2,000,000,000	2,000,000,000
Common stock, shares outstanding (in shares)	770,000,000	769,000,000
Piedmont
Allowance for doubtful accounts - receivables	$ 15	$ 15
Common stock, shares authorized (in shares)	100,000,000	100,000,000
Common stock, shares outstanding (in shares)	100,000,000	100,000,000

Condensed Consolidated State_25

Condensed Consolidated Statements of Cash Flows - Duke Energy Piedmont - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
CASH FLOWS FROM OPERATING ACTIVITIES
Net Income Attributable to Duke Energy Corporation	$ 1,764	$ 1,757
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion (including amortization of nuclear fuel)	2,923	2,753
Equity component of AFUDC	(99)	(83)
Impairment of assets and other charges	206	131
Deferred income taxes	67	119
Equity in earnings (losses) of unconsolidated affiliates	(61)	8
Provision for rate refunds	(65)	(13)
(Increase) decrease in
Receivables	(180)	85
Inventory	(12)	153
Other current assets	(1,144)	(297)
Increase (decrease) in
Accounts payable	408	(297)
Taxes accrued	(49)	219
Other current liabilities	99	(326)
Other assets	55	77
Other liabilities	91	(47)
Net cash provided by operating activities	4,035	3,873
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(5,117)	(4,636)
Payments to Acquire Interest in Subsidiaries and Affiliates	(32)	(21)
Other	(384)	(137)
Net cash used in investing activities	(5,492)	(5,614)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from the issuance of long-term debt	5,714	4,627
Payments for the redemption of long-term debt	(3,147)	(2,002)
Other	(101)	(72)
Net cash provided by financing activities	1,576	1,750
Net increase in cash, cash equivalents and restricted cash	119	9
Cash, cash equivalents and restricted cash at beginning of period	520	556
Cash, cash equivalents and restricted cash at end of period	639	565
Significant non-cash transactions:
Accrued capital expenditures	1,264	990
Piedmont
CASH FLOWS FROM OPERATING ACTIVITIES
Net Income Attributable to Duke Energy Corporation	213	199
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion (including amortization of nuclear fuel)	111	101
Equity component of AFUDC	(4)	(14)
Losses on sale of other assets	(4)
Impairment of assets and other charges		5
Deferred income taxes	(4)	3
Equity in earnings (losses) of unconsolidated affiliates	(4)	(4)
Provision for rate refunds	(3)	(3)
(Increase) decrease in
Receivables	168	137
Inventory	40	26
Other current assets	(63)	30
Increase (decrease) in
Accounts payable	31	(70)
Accounts payable to affiliated companies	4	(35)
Taxes accrued	(32)	3
Other current liabilities	44	(30)
Other assets	(2)	6
Other liabilities	(1)	(2)
Net cash provided by operating activities	494	352
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(385)	(411)
Payments to Acquire Interest in Subsidiaries and Affiliates	(8)
Return of investment capital		1
Other	(9)	(17)
Net cash used in investing activities	(402)	(427)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from the issuance of long-term debt	394	347
Payments for the redemption of long-term debt		(160)
Notes receivable from affiliated companies	(485)	(437)
Capital contributions from parent		325
Other	(1)
Net cash provided by financing activities	(92)	75
Significant non-cash transactions:
Accrued capital expenditures	$ 124	$ 111

Condensed Consolidated State_26

Condensed Consolidated Statements of Changes in Equity - Piedmont - USD ($) $ in Millions	Total	Piedmont	Piedmont Common Stock	Piedmont Retained Earnings
Beginning Balance (parent) at Dec. 31, 2020		$ 2,715	$ 1,310	$ 1,405
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income Attributable to Duke Energy Corporation	$ 1,757	199		199
Contribution from parent		325	325
Ending Balance (parent) at Jun. 30, 2021		3,239	1,635	1,604
Beginning Balance (parent) at Mar. 31, 2021		3,243	1,635	1,608
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income Attributable to Duke Energy Corporation	765	(4)		(4)
Ending Balance (parent) at Jun. 30, 2021		3,239	1,635	1,604
Beginning Balance (parent) at Dec. 31, 2021	49,296	3,349	1,635	1,714
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income Attributable to Duke Energy Corporation	1,764	213		213
Ending Balance (parent) at Jun. 30, 2022	49,720	3,562	1,635	1,927
Beginning Balance (parent) at Mar. 31, 2022		3,563	1,635	1,928
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income Attributable to Duke Energy Corporation	907	(1)		(1)
Ending Balance (parent) at Jun. 30, 2022	$ 49,720	$ 3,562	$ 1,635	$ 1,927

Organization and Basis of Prese

Organization and Basis of Presentation	6 Months Ended
	Jun. 30, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization and Basis of Presentation	Index to Combined Notes to Condensed Consolidated Financial Statements The unaudited notes to the Condensed Consolidated Financial Statements that follow are a combined presentation. The following list indicates the registrants to which the footnotes apply. Applicable Notes Registrant 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Duke Energy • • • • • • • • • • • • • • • Duke Energy Carolinas • • • • • • • • • • • • • • Progress Energy • • • • • • • • • • • • • • • Duke Energy Progress • • • • • • • • • • • • • • Duke Energy Florida • • • • • • • • • • • • • • Duke Energy Ohio • • • • • • • • • • • • • • Duke Energy Indiana • • • • • • • • • • • • • • Piedmont • • • • • • • • • • • • • Tables within the notes may not sum across due to (i) Progress Energy's consolidation of Duke Energy Progress, Duke Energy Florida and other subsidiaries that are not registrants and (ii) subsidiaries that are not registrants but included in the consolidated Duke Energy balances. BASIS OF PRESENTATION These Condensed Consolidated Financial Statements have been prepared in accordance with GAAP for interim financial information and with the instructions to Form 10-Q and Regulation S-X. Accordingly, these Condensed Consolidated Financial Statements do not include all information and notes required by GAAP for annual financial statements and should be read in conjunction with the Consolidated Financial Statements in the Duke Energy Registrants’ combined Annual Report on Form 10-K for the year ended December 31, 2021. The information in these combined notes relates to each of the Duke Energy Registrants as noted in the Index to Combined Notes to Condensed Consolidated Financial Statements. However, none of the registrants make any representations as to information related solely to Duke Energy or the subsidiaries of Duke Energy other than itself. These Condensed Consolidated Financial Statements, in the opinion of the respective companies’ management, reflect all normal recurring adjustments necessary to fairly present the financial position and results of operations of each of the Duke Energy Registrants. Amounts reported in Duke Energy’s interim Condensed Consolidated Statements of Operations and each of the Subsidiary Registrants’ interim Condensed Consolidated Statements of Operations and Comprehensive Income are not necessarily indicative of amounts expected for the respective annual periods due to effects of seasonal temperature variations on energy consumption, regulatory rulings, timing of maintenance on electric generating units, changes in mark-to-market valuations, changing commodity prices and other factors. In preparing financial statements that conform to GAAP, management must make estimates and assumptions that affect the reported amounts of assets and liabilities, the reported amounts of revenues and expenses and the disclosure of contingent assets and liabilities at the date of the financial statements. Actual results could differ from those estimates. BASIS OF CONSOLIDATION These Condensed Consolidated Financial Statements include, after eliminating intercompany transactions and balances, the accounts of the Duke Energy Registrants and subsidiaries or VIEs where the respective Duke Energy Registrants have control. See Note 11 for additional information on VIEs. These Condensed Consolidated Financial Statements also reflect the Duke Energy Registrants’ proportionate share of certain jointly owned generation and transmission facilities. NONCONTROLLING INTEREST Duke Energy maintains a controlling financial interest in certain less than wholly owned nonregulated subsidiaries. As a result, Duke Energy consolidates these subsidiaries and presents the third-party investors' portion of Duke Energy's net income (loss), net assets and comprehensive income (loss) as noncontrolling interest. Noncontrolling interest is included as a component of equity on the Condensed Consolidated Balance Sheets. Several operating agreements of Duke Energy's subsidiaries with noncontrolling interest are subject to allocations of earnings, tax attributes and cash flows in accordance with contractual agreements that vary throughout the lives of the subsidiaries. Therefore, Duke Energy and the other investors' (the owners) interests in the subsidiaries are not fixed, and the subsidiaries apply the Hypothetical Liquidation at Book Value (HLBV) method in allocating income or loss and other comprehensive income or loss (all measured on a pretax basis) to the owners. The HLBV method measures the amounts that each owner would hypothetically claim at each balance sheet reporting date, including tax benefits realized by the owners over the IRS recapture period, upon a hypothetical liquidation of the subsidiary at the net book value of its underlying assets. The change in the amount that each owner would hypothetically receive at the reporting date compared to the amount it would have received on the previous reporting date represents the amount of income or loss allocated to each owner for the reporting period. During September 2021, Duke Energy completed the initial minority interest investment in a portion of Duke Energy Indiana to an affiliate of GIC. GIC's ownership interest in Duke Energy Indiana represents a noncontrolling interest. See Note 2 for additional information on the sale. Other operating agreements of Duke Energy's subsidiaries with noncontrolling interest allocate profit and loss based on their pro rata shares of the ownership interest in the respective subsidiary. Therefore, Duke Energy allocates net income or loss and other comprehensive income or loss of these subsidiaries to the owners based on their pro rata shares . The following table presents allocated losses to noncontrolling interest for the three and six months ended June 30, 2022, and 2021. Three Months Ended June 30, Six Months Ended June 30, (in millions) 2022 2021 2022 2021 Noncontrolling Interest Allocation of Income Allocated losses to noncontrolling tax equity members utilizing the HLBV method $ 44 $ 55 $ 68 $ 98 Allocated (income) losses to noncontrolling members based on pro rata shares of ownership (17) 12 (4) 20 Total Noncontrolling Interest Allocated Losses $ 27 $ 67 $ 64 $ 118 CASH, CASH EQUIVALENTS AND RESTRICTED CASH Duke Energy, Duke Energy Carolinas, Progress Energy, Duke Energy Progress and Duke Energy Florida have restricted cash balances related primarily to collateral assets, escrow deposits and VIEs. See Notes 9 and 11 for additional information. Restricted cash amounts are included in Other within Current Assets and Other Noncurrent Assets on the Condensed Consolidated Balance Sheets. The following table presents the components of cash, cash equivalents and restricted cash included in the Condensed Consolidated Balance Sheets. June 30, 2022 December 31, 2021 Duke Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Duke Energy Progress Energy Energy Energy Carolinas Energy Progress Florida Energy Carolinas Energy Progress Florida Current Assets Cash and cash equivalents $ 428 $ 37 $ 129 $ 75 $ 44 $ 343 $ 7 $ 70 $ 35 $ 23 Other 193 9 59 26 33 170 — 39 — 39 Other Noncurrent Assets Other 18 1 4 4 — 7 1 4 4 — Total cash, cash equivalents and restricted cash $ 639 $ 47 $ 192 $ 105 $ 77 $ 520 $ 8 $ 113 $ 39 $ 62 INVENTORY Provisions for inventory write-offs were not material at June 30, 2022, and December 31, 2021. The components of inventory are presented in the tables below. June 30, 2022 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Materials and supplies $ 2,490 $ 817 $ 1,124 $ 769 $ 355 $ 88 $ 321 $ 13 Coal 446 182 132 79 53 14 117 — Natural gas, oil and other fuel 272 34 170 100 70 10 3 55 Total inventory $ 3,208 $ 1,033 $ 1,426 $ 948 $ 478 $ 112 $ 441 $ 68 December 31, 2021 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Materials and supplies $ 2,397 $ 793 $ 1,067 $ 729 $ 338 $ 80 $ 311 $ 14 Coal 486 195 167 94 73 19 105 — Natural gas, oil and other fuel 316 38 164 98 66 17 2 95 Total inventory $ 3,199 $ 1,026 $ 1,398 $ 921 $ 477 $ 116 $ 418 $ 109 OTHER NONCURRENT ASSETS Duke Energy, through a nonregulated subsidiary, was the winner of the Carolina Long Bay offshore wind auction. As a result, an asset of $150 million related to the arrangement was recorded in Other within Other noncurrent assets as of June 30, 2022. NEW ACCOUNTING STANDARDS No new accounting standards were adopted by the Duke Energy Registrants in 2022.

Business Segments

Business Segments	6 Months Ended
	Jun. 30, 2022
Segment Reporting [Abstract]
Business Segments	BUSINESS SEGMENTS Duke Energy Duke Energy's segment structure includes the following segments: Electric Utilities and Infrastructure, Gas Utilities and Infrastructure and Commercial Renewables. The Electric Utilities and Infrastructure segment primarily includes Duke Energy's regulated electric utilities in the Carolinas, Florida and the Midwest. On January 28, 2021, Duke Energy executed an agreement providing for an investment by an affiliate of GIC in Duke Energy Indiana in exchange for a 19.9% minority interest issued by Duke Energy Indiana Holdco, LLC, the holding company for Duke Energy Indiana. The transaction will be completed following two closings for an aggregate purchase price of approximately $2 billion. The first closing, which occurred on September 8, 2021, resulted in Duke Energy Indiana Holdco, LLC issuing 11.05% of its membership interests in exchange for approximately $1,025 million or 50% of the purchase price. Duke Energy retained indirect control of these assets, and, therefore, no gain or loss was recognized on the Condensed Consolidated Statements of Operations. Duke Energy has the discretion to determine the timing of the second closing, but it will occur no later than January 2023. At the second closing, Duke Energy will issue and sell additional membership interests such that GIC will own 19.9% of the membership interests for the remaining 50% of the purchase price. The Gas Utilities and Infrastructure segment includes Piedmont, Duke Energy's natural gas local distribution companies in Ohio and Kentucky and Duke Energy's natural gas storage, midstream pipeline and renewable natural gas investments. The Commercial Renewables segment is primarily comprised of nonregulated utility-scale wind and solar generation assets located throughout the U.S. On August 4, 2022 Duke Energy announced a strategic review of the Commercial Renewables business segment. The review remains in the preliminary stage and there have been no binding or non-binding offers requested or submitted. Duke Energy can provide no assurance that this process will result in a transaction and there is no specific timeline for execution of a potential transaction. If the potential sale were to progress it could result in classification of the Commercial Renewables segment as assets held for sale and as discontinued operations. If Duke Energy is unable to recover its book value of these assets through a sale, it could result in an impairment. Duke Energy continues to monitor recoverability of its renewable merchant plants located in the ERCOT West market and in the PJM West market due to fluctuating market pricing and long-term forecasted energy prices. The assets were not impaired as of June 30, 2022, because the carrying value of approximately $195 million continues to be supported by the expected cash flows. Duke Energy has a 51% ownership interest in these assets. A decline in energy market pricing or other factors unfavorably impacting the economics would likely result in a future impairment. The remainder of Duke Energy’s operations is presented as Other, which is primarily comprised of interest expense on holding company debt, unallocated corporate costs, Duke Energy’s wholly owned captive insurance company, Bison, and Duke Energy's ownership interest in National Methanol Company. Business segment information is presented in the following tables. Segment assets presented exclude intercompany assets. Three Months Ended June 30, 2022 Electric Gas Total Utilities and Utilities and Commercial Reportable (in millions) Infrastructure Infrastructure Renewables Segments Other Eliminations Total Unaffiliated revenues $ 6,126 $ 430 $ 121 $ 6,677 $ 8 $ — $ 6,685 Intersegment revenues 9 23 — 32 22 (54) — Total revenues $ 6,135 $ 453 $ 121 $ 6,709 $ 30 $ (54) $ 6,685 Segment income (loss) (a) $ 974 $ 19 $ 30 $ 1,023 $ (130) $ — $ 893 Less: Noncontrolling interests 27 Add: Preferred stock dividend 14 Net Income $ 880 Segment assets $ 145,874 $ 15,420 $ 7,276 $ 168,570 $ 3,821 $ (8) $ 172,383 Three Months Ended June 30, 2021 Electric Gas Total Utilities and Utilities and Commercial Reportable (in millions) Infrastructure Infrastructure Renewables Segments Other Eliminations Total Unaffiliated revenues $ 5,328 $ 305 $ 119 $ 5,752 $ 6 $ — $ 5,758 Intersegment revenues 7 22 — 29 21 (50) — Total revenues $ 5,335 $ 327 $ 119 $ 5,781 $ 27 $ (50) $ 5,758 Segment income (loss) (b) $ 935 $ 17 $ 47 $ 999 $ (248) $ — $ 751 Less: Noncontrolling interests 67 Add: Preferred stock dividend 14 Net Income $ 698 (a) Electric Utilities and Infrastructure includes $2 million within Noncontrolling Interests related to the Duke Energy Indiana Supreme Court ruling on the Condensed Consolidated Statements of Operations. See Note 3 for additional information. Commercial Renewables includes a $21 million loss recorded within Nonregulated electric and other revenues related to mark-to-market derivative contracts on the Condensed Consolidated Statements of Operations. (b) Gas Utilities and Infrastructure includes $16 million, recorded within Equity in earnings (losses) of unconsolidated affiliates on the Condensed Consolidated Statements of Operations, related to gas pipeline investments. Other includes $131 million recorded within Impairment of assets and other charges, $27 million within Operations, maintenance and other, and $17 million within Depreciation and amortization on the Condensed Consolidated Statements of Operations, related to the workplace and workplace realignment. Six Months Ended June 30, 2022 Electric Gas Total Utilities and Utilities and Commercial Reportable (in millions) Infrastructure Infrastructure Renewables Segments Other Eliminations Total Unaffiliated revenues $ 12,121 $ 1,439 $ 242 $ 13,802 $ 15 $ — $ 13,817 Intersegment revenues 16 46 — 62 45 (107) — Total revenues $ 12,137 $ 1,485 $ 242 $ 13,864 $ 60 $ (107) $ 13,817 Segment income (loss) (a) $ 1,697 $ 273 $ 41 $ 2,011 $ (300) $ — $ 1,711 Less: Noncontrolling interests 64 Add: Preferred stock dividend 53 Net Income $ 1,700 Six Months Ended June 30, 2021 Electric Gas Total Utilities and Utilities and Commercial Reportable (in millions) Infrastructure Infrastructure Renewables Segments Other Eliminations Total Unaffiliated revenues $ 10,601 $ 1,057 $ 238 $ 11,896 $ 12 $ — $ 11,908 Intersegment revenues 15 45 — 60 41 (101) — Total revenues $ 10,616 $ 1,102 $ 238 $ 11,956 $ 53 $ (101) $ 11,908 Segment income (loss) (b) $ 1,755 $ 262 $ 74 $ 2,091 $ (387) $ — $ 1,704 Less: Noncontrolling interests 118 Add: Preferred stock dividend 53 Net Income $ 1,639 (a) Electric Utilities and Infrastructure includes $211 million recorded within Impairment of assets and other charges, $46 million within Regulated electric revenues and $20 million within Noncontrolling Interests related to the Duke Energy Indiana Supreme Court ruling on the Condensed Consolidated Statements of Operations. See Note 3 for additional information. Commercial Renewables includes a $21 million loss recorded within Nonregulated electric and other revenues related to mark-to-market derivative contracts on the Condensed Consolidated Statements of Operations. (b) Gas Utilities and Infrastructure includes $22 million, recorded within Equity in earnings (losses) of unconsolidated affiliates on the Condensed Consolidated Statements of Operations, related to gas pipeline investments. Commercial Renewables includes a $35 million loss related to Texas Storm Uri, of which ($8 million) is recorded within Nonregulated electric and other revenues, $2 million within Operations, maintenance and other, $29 million within Equity in earnings (losses) of unconsolidated affiliates and $12 million within Loss Attributable to Noncontrolling Interests on the Condensed Consolidated Statements of Operations. See Note 4 for additional information. Other includes $131 million recorded within Impairment of assets and other charges, $27 million within Operations, maintenance and other, and $17 million within Depreciation and amortization on the Condensed Consolidated Statements of Operations, related to the workplace and workplace realignment. Duke Energy Ohio Duke Energy Ohio has two reportable segments, Electric Utilities and Infrastructure and Gas Utilities and Infrastructure. The remainder of Duke Energy Ohio's operations is presented as Other. Three Months Ended June 30, 2022 Electric Gas Total Utilities and Utilities and Reportable (in millions) Infrastructure Infrastructure Segments Other Eliminations Total Total revenues $ 401 $ 144 $ 545 $ — $ — $ 545 Segment income/Net (loss) income $ 37 $ 19 $ 56 $ — $ — $ 56 Segment assets $ 7,237 $ 3,899 $ 11,136 $ 14 $ (135) $ 11,015 Three Months Ended June 30, 2021 Electric Gas Total Utilities and Utilities and Reportable (in millions) Infrastructure Infrastructure Segments Other Total Total revenues $ 343 $ 113 $ 456 $ — $ 456 Segment income/Net (loss) income $ 24 $ 23 $ 47 $ (8) $ 39 Six Months Ended June 30, 2022 Electric Gas Total Utilities and Utilities and Reportable (in millions) Infrastructure Infrastructure Segments Other Total Total revenues $ 813 $ 370 $ 1,183 $ — $ 1,183 Segment income/Net (loss) income $ 78 $ 57 $ 135 $ (2) $ 133 Six Months Ended June 30, 2021 Electric Gas Total Utilities and Utilities and Reportable (in millions) Infrastructure Infrastructure Segments Other Total Total revenues $ 706 $ 282 $ 988 $ — $ 988 Segment income/Net (loss) income $ 74 $ 66 $ 140 $ (10) $ 130

Regulatory Matters

Regulatory Matters	6 Months Ended
	Jun. 30, 2022
Regulated Operations [Abstract]
Regulatory Matters	REGULATORY MATTERS RATE-RELATED INFORMATION The NCUC, PSCSC, FPSC, IURC, PUCO, TPUC and KPSC approve rates for retail electric and natural gas services within their states. The FERC approves rates for electric sales to wholesale customers served under cost-based rates (excluding Ohio and Indiana), as well as sales of transmission service. The FERC also regulates certification and siting of new interstate natural gas pipeline projects. Duke Energy Carolinas and Duke Energy Progress Carbon Plan Proceeding The NCUC is required by North Carolina House Bill 951 (HB 951) to adopt an initial Carbon Plan on or before December 31, 2022. Duke Energy Carolinas and Duke Energy Progress filed their proposed Carbon Plan on May 16, 2022. The NCUC Public Staff and other parties filed their reply comments on July 15, 2022, including alternative Carbon Plans filed by some of the other parties . The NCUC is conducting public hearings across North Carolina in July 2022 and August 2022. On July 29, 2022, the NCUC issued a procedural order setting forth the issues to be addressed in expert witness hearing scheduled to begin on September 13, 2022, and the issues to be addressed by written comments. Duke Energy Carolinas and Duke Energy Progress cannot predict the outcome of this matter. Storm Cost Securitization Legislation On June 15, 2022, the South Carolina General Assembly unanimously adopted S. 1077 (Act 227) in both the House and Senate and the bill was signed into law by Governor Henry McMaster on June 17, 2022. The legislation enables the PSCSC to permit the issuance of bonds for the payment of storm costs and the creation of a storm charge for repayment. Duke Energy Carolinas Oconee Nuclear Station Subsequent License Renewal On June 7, 2021, Duke Energy Carolinas filed a subsequent license renewal (SLR) application for the Oconee Nuclear Station (ONS) with the U.S. Nuclear Regulatory Commission (NRC) to renew ONS’s operating license for an additional 20 years. The SLR would extend operations of the facility from 60 to 80 years. The current licenses for units 1 and 2 expire in 2033 and the license for unit 3 expires in 2034. By a Federal Register Notice dated July 28, 2021, the NRC provided a 60-day comment period for persons whose interest may be affected by the issuance of a subsequent renewed license for ONS to file a request for a hearing and a petition for leave to intervene. On September 27, 2021, Beyond Nuclear and Sierra Club (Petitioners) filed a Hearing Request and Petition to Intervene (Hearing Request) and a Petition for Waiver. The Hearing Request proposed three contentions purporting to challenge Duke Energy Carolinas’ environmental report (ER). In general, the proposed contentions claimed that the ER did not consider certain information regarding the environmental aspects of severe accidents caused by a hypothetical failure of the Jocassee Dam in South Carolina and, therefore, did not satisfy the National Environmental Policy Act (NEPA) of 1969, as amended, or the NRC’s NEPA-implementing regulations. Duke Energy Carolinas filed its answer to the proposed contentions on October 22, 2021, and the Petitioners filed their reply to Duke Energy Carolinas’ answer on November 5, 2021. On February 11, 2022, the Atomic Safety and Licensing Board (ASLB) issued its decision on the Hearing Request and found that the Petitioners failed to establish that the proposed contentions are litigable. The ASLB also denied the Petitioners' Petition for Waiver and terminated the proceeding. On February 24, 2022, the NRC issued a decision in the SLR appeal related to the Turkey Point nuclear generating station in Florida and ruled that the NRC’s license renewal Generic Environmental Impact Statement (GEIS) does not apply to SLR because the GEIS does not address SLR. The decision overturned a 2020 NRC decision that found the GEIS applies to SLR. While Turkey Point is not owned or operated by a Duke Energy Registrant, the NRC’s order applies to all SLR applicants, including ONS. The NRC order also indicated no subsequent renewed licenses will be issued until the NRC staff has completed an adequate NEPA review for each application. On April 5, 2022, the NRC approved a 24-month rulemaking plan that will enable the NRC staff to complete an adequate NEPA review. Although an SLR applicant may wait until the rulemaking is completed, the NRC also noted that an applicant may submit a revised ER providing information on environmental impacts during the SLR period prior to the rulemaking being completed. Duke Energy Carolinas is evaluating the two options to determine which is preferable for ONS. Although the NRC’s decision will delay completion of the SLR proceeding, Duke Energy Carolinas does not believe it changes the probability that the ONS subsequent renewed licenses will ultimately be issued, although Duke Energy Carolinas cannot guarantee the outcome of the license application process. Duke Energy Carolinas and Duke Energy Progress intend to seek renewal of operating licenses and 20-year license extensions for all of their nuclear stations. New depreciation rates were implemented for all of the nuclear facilities during the second quarter of 2021. Duke Energy Carolinas and Duke Energy Progress cannot predict the outcome of these additional relicensing proceedings. Duke Energy Progress 2022 North Carolina Rate Case On June 8, 2022, Duke Energy Progress requested initiation of the process necessary to file a performance-based regulation application (PBR Application). The request notified the NCUC that such PBR Application would be targeted for filing no earlier than October 6, 2022. 2022 South Carolina Rate Case On August 1, 2022, D uke Energy Progress filed a notice with the PSCSC of the company's intent to file a base rate adjustment application no earlier than 30 days from the date of notice. FERC Return on Equity Complaint On October 16, 2020, North Carolina Electric Membership Corporation (NCEMC) filed a complaint at the FERC against Duke Energy Progress pursuant to Section 206 of the Federal Power Act (FPA), alleging that the 11% stated return on equity (ROE) component in the demand formula rate in the Power Supply and Coordination Agreement between NCEMC and Duke Energy Progress is unjust and unreasonable. On June 16, 2022, Duke Energy Progress submitted to the FERC an Offer of Settlement and Settlement Agreement (Settlement Agreement) between NCEMC and Duke Energy Progress. The Settlement Agreement provides for an ROE of 10%, effective January 1, 2022, among other contract modifications. On July 5, 2022, NCEMC filed comments in support of the Settlement Agreement. The parties are awaiting FERC approval of the Settlement Agreement . The final disposition of these proceedings is not expected to have a material effect on the results of operations, cash flows or financial position of Duke Energy Progress. Duke Energy Florida 2021 Settlement Agreement On January 14, 2021, Duke Energy Florida filed a Settlement Agreement (the “2021 Settlement”) with the FPSC. The parties to the 2021 Settlement include Duke Energy Florida, the Office of Public Counsel (OPC), the Florida Industrial Power Users Group, White Springs Agricultural Chemicals, Inc. d/b/a PCS Phosphate and NUCOR Steel Florida, Inc. (collectively, the “Parties”). Pursuant to the 2021 Settlement, the Parties agreed to a base rate stay-out provision that expires year-end 2024; however, Duke Energy Florida is allowed an increase to its base rates of an incremental $67 million in 2022, $49 million in 2023 and $79 million in 2024, subject to adjustment in the event of tax reform during the years 2021, 2022 and 2023. The Parties also agreed to an ROE band of 8.85% to 10.85% with a midpoint of 9.85% based on a capital structure of 53% equity and 47% debt. The ROE band can be increased by 25 basis points if the average 30-year U.S. Treasury rate increases 50 basis points or more over a six-month period in which case the midpoint ROE would rise from 9.85% to 10.10%. On July 25, 2022, this provision was triggered. Duke Energy Florida has not yet made a filing to increase the ROE, but upon filing, the FPSC must rule on this matter within 60 days of the filing per the terms of the 2021 Settlement. The 2021 Settlement Agreement also provides that Duke Energy Florida will be able to retain the $173 million retail portion of the expected DOE award from its lawsuit to recover spent nuclear fuel to mitigate customer rates over the term of the 2021 Settlement. In return, Duke Energy Florida will be able to recognize the $173 million into earnings from 2022 through 2024. Duke Energy Florida settled the DOE lawsuit and received payment of approximately $180 million on June 15, 2022, of which the retail portion was approximately $154 million. The 2021 Settlement authorizes Duke Energy Florida to collect the difference between $173 million and the $154 million retail portion of the amount received through the capacity cost recovery clause. In addition to these terms, the 2021 Settlement contained provisions related to the accelerated depreciation of Crystal River Units 4-5, the approval of approximately $1 billion in future investments in new cost-effective solar power, the implementation of a new Electric Vehicle Charging Station Program and the deferral and recovery of costs in connection with the implementation of Duke Energy Florida’s Vision Florida program, which explores various emerging non-carbon emitting generation technology, distributed technologies and resiliency projects, among other things. The 2021 Settlement also resolved remaining unrecovered storm costs for Hurricane Michael and Hurricane Dorian. The FPSC approved the 2021 Settlement on May 4, 2021, issuing an order on June 4, 2021. Revised customer rates became effective January 1, 2022, with subsequent base rate increases effective January 1, 2023, and January 1, 2024. Clean Energy Connection On July 1, 2020, Duke Energy Florida petitioned the FPSC for approval of a voluntary solar program. The program consists of 10 new solar generating facilities with combined capacity of approximately 750 MW. The program allows participants to support cost-effective solar development in Florida by paying a subscription fee based on per kilowatt subscriptions and receiving a credit on their bill based on the actual generation associated with their portion of the solar portfolio. The estimated cost of the 10 new solar generation facilities is approximately $1 billion over the next three years, and this investment will be included in base rates offset by the revenue from the subscription fees. The credits will be included for recovery in the fuel cost recovery clause. The FPSC approved the program in January 2021. On February 24, 2021, the League of United Latin American Citizens (LULAC) filed a notice of appeal of the FPSC’s order approving the Clean Energy Connection to the Supreme Court of Florida. The Supreme Court of Florida heard the oral argument on February 9, 2022. On May 27, 2022, the Supreme Court of Florida issued an order remanding the case back to the FPSC so that the FPSC can amend its order to better address some of the arguments raised by LULAC. The FPSC has not indicated a time frame in which it intends to act on revising its order. The FPSC approval order remains in effect pending the outcome of the appeal. Duke Energy Florida cannot predict the outcome of this matter. Storm Protection Plan On April 11, 2022, Duke Energy Florida filed a Storm Protection Plan for approval with the FPSC. The plan, which covers investments for the 2023-2032 time frame, reflects approxim ately $7 billion of capital inv estment in transmission and distribution meant to strengthen its infrastructure, reduce outage times associated with extreme weather events, reduce restoration costs and improve ove rall service reliability. The evidentiary hearing began on August 2, 2022. Duke Energy Florida cannot predict the outcome of this matter. Duke Energy Ohio Duke Energy Ohio Electric Base Rate Case Duke Energy Ohio filed with the PUCO an electric distribution base rate case application on October 1, 2021, with supporting testimony filed on October 15, 2021, requesting an increase in electric distribution base rates of approximately $55 million and an ROE of 10.3%. This is an approximate 3.3% average increase in the customer's total bill across all customer classes. The drivers for this case are capital invested since Duke Energy Ohio's last electric distribution base rate case in 2017. Duke Energy Ohio is also seeking to adjust the caps on its Distribution Capital Investment Rider (DCI Rider). The Staff of the PUCO (Staff) report was issued on May 19, 2022, recommending an increase in electric distribution base rates of $2 million to $15 million with an ROE range of 8.84% to 9.85%. The procedural schedule was set with supplemental testimony to be filed August 18, 2022, and rebuttal testimony to be filed September 1, 2022. An evidentiary hearing is scheduled to begin on September 19, 2022. Depending on the matters submitted for hearing, a PUCO decision could be issued by the end of 2022. Duke Energy Ohio cannot predict the outcome of this matter. Energy Efficiency Cost Recovery In response to changes in Ohio law that eliminated Ohio's energy efficiency mandates, the PUCO issued an order on February 26, 2020, directing utilities to wind down their demand-side management programs by September 30, 2020, and to terminate the programs by December 31, 2020. Duke Energy Ohio took the following actions: • On March 27, 2020, Duke Energy Ohio filed an application for rehearing seeking clarification on the final true up and reconciliation process after 2020. On November 18, 2020, the PUCO issued an order replacing the cost cap previously imposed upon Duke Energy Ohio with a cap on shared savings recovery. On December 18, 2020, Duke Energy Ohio filed an additional application for rehearing challenging, among other things, the imposition of the cap on shared savings. On January 13, 2021, the application for rehearing was granted for further consideration. • On October 9, 2020, Duke Energy Ohio filed an application to implement a voluntary energy efficiency program portfolio to commence on January 1, 2021. The application proposed a mechanism for recovery of program costs and a benefit associated with avoided transmission and distribution costs. The application remains under review. • On November 18, 2020, the PUCO issued an order directing all utilities to set their energy efficiency riders to zero effective January 1, 2021, and to file a separate application for final reconciliation of all energy efficiency costs prior to December 31, 2020. Effective January 1, 2021, Duke Energy Ohio suspended its energy efficiency programs. • On June 14, 2021, the PUCO requested each utility to file by July 15, 2021, a proposal to reestablish low-income programs through December 31, 2021. Duke Energy Ohio filed its application on July 14, 2021. • On February 23, 2022, the PUCO issued its Fifth Entry on Rehearing that 1) affirmed its reduction in Duke Energy Ohio's shared savings cap; 2) denied rehearing/clarification regarding lost distribution revenues and shared savings recovery for periods after December 31, 2020; and 3) directed Duke Energy Ohio to submit an updated application with exhibits. • On March 25, 2022, Duke Energy Ohio filed its Amended Application consistent with the PUCO's order. Duke Energy Ohio cannot predict the outcome of this matter. Duke Energy Ohio Natural Gas Base Rate Case Duke Energy Ohio filed with the PUCO a natural gas base rate case application on June 30, 2022, with supporting testimony filed on July 14, 2022, requesting an increase in natural gas base rates of approximately $49 million and an ROE of 10.3%. This is an approximate 5.6% average increase in the customer's total bill across all customer classes. The drivers for this case are capital invested since Duke Energy Ohio's last natural gas base rate case in 2012. Duke Energy Ohio is also seeking to adjust the caps on its Capital Expenditure Program Rider (CEP Rider). Duke Energy Ohio cannot predict the outcome of this matter. Natural Gas Pipeline Extension Duke Energy Ohio installed a new natural gas pipeline (the Central Corridor Project) in its Ohio service territory to increase system reliability and enable the retirement of older infrastructure. Construction of the pipeline extension was completed and placed in service on March 14, 2022. Duke Energy Ohio expects the final cost for the pipeline development and construction activities to be approximately $185 million (excluding overheads and AFUDC). MGP Cost Recovery In an order issued in 2013, the PUCO approved Duke Energy Ohio's deferral and recovery of costs related to environmental remediation at two sites (East End and West End) that housed former MGP operations. Duke Energy Ohio made annual applications with the PUCO to recover its incremental remediation costs consistent with the PUCO’s directive in Duke Energy Ohio’s 2012 natural gas base rate case. The Staff issued reports recommending a disallowance of MGP remediation costs incurred that the Staff believes are not eligible for recovery. The Staff interprets the PUCO’s 2013 order granting Duke Energy Ohio recovery of MGP remediation as limiting the recovery to work directly on the East End and West End sites. Duke Energy Ohio filed reply comments objecting to the Staff’s recommendations and explaining, among other things, the obligation Duke Energy Ohio has under Ohio law to remediate all areas impacted by the former MGPs and not just physical property that housed the former plants and equipment. Additionally, the Staff recommended that any discussion pertaining to Duke Energy Ohio's recovery of ongoing MGP costs should be directly tied to or netted against insurance proceeds collected by Duke Energy Ohio. An evidentiary hearing concluded on November 21, 2019. Initial briefs were filed on January 17, 2020, and reply briefs were filed on February 14, 2020. The 2013 PUCO order also contained conditional deadlines for completing the MGP environmental remediation and the deferral of related remediation costs. Subsequent to the order, the deadline was extended to December 31, 2019. On May 10, 2019, Duke Energy Ohio filed an application requesting a continuation of its existing deferral authority for MGP remediation that must occur after December 31, 2019. On July 12, 2019, the Staff recommended the commission deny the deferral authority request. On September 13, 2019, intervenor comments were filed opposing Duke Energy Ohio's request for continuation of existing deferral authority and on October 2, 2019, Duke Energy Ohio filed reply comments. A Stipulation and Recommendation was filed jointly by Duke Energy Ohio, the Staff, the Office of the Ohio Consumers' Counsel and the Ohio Energy Group on August 31, 2021, which was approved without modification by the PUCO on April 20, 2022. The Stipulation and Recommendation resolved all open issues regarding MGP remediation costs incurred between 2013 and 2019, Duke Energy Ohio’s request for additional deferral authority beyond 2019 and the pending issues related to the Tax Act described below as it related to Duke Energy Ohio’s natural gas operations. As a result of the approval of the Stipulation and Recommendation, Duke Energy Ohio recognized pretax charges of approximately $15 million to Operating revenues, regulated natural gas and $58 million to Operation, maintenance and other and a tax benefit of $72 million to Income Tax (Benefit) Expense in the Condensed Consolidated Statements of Operations for the six months ended June 30, 2022. The Stipulation and Recommendation further acknowledged Duke Energy Ohio’s ability to file a request for additional deferral authority in the future related to environmental remediation of any MGP impacts in the Ohio River, if necessary, subject to specific conditions. On June 15, 2022, the PUCO granted the rehearing requests of Interstate Gas Supply, Inc. (IGS) and The Retail Energy Supply Association (RESA), which were filed on May 20, 2022, for further consideration. Duke Energy Ohio cannot predict the outcome of this matter. Tax Act – Ohio On December 21, 2018, Duke Energy Ohio filed an application to change its base rate tariffs and establish a new rider to implement the benefits of the Tax Act for natural gas customers. The new rider would flow through to customers the benefit of the reduction in the statutory federal tax rate from 35% to 21% since January 1, 2018, all future benefits of the lower tax rates and a full refund of deferred income taxes collected at the higher tax rates in prior years. Deferred income taxes subject to normalization rules would be refunded consistent with federal law and deferred income taxes not subject to normalization rules will be refunded over a 10-year period. An evidentiary hearing occurred on August 7, 2019. The Stipulation and Recommendation filed on August 31, 2021, and approved on April 20, 2022, disclosed in the MGP Cost Recovery matter above, resolves the outstanding issues in this proceeding by providing customers a one-time bill credit for the reduction in the statutory federal tax rate from 35% to 21% since January 1, 2018, through June 1, 2022, and reducing base rates going forward. Deferred income taxes subject to normalization rules will be refunded consistent with federal law through a new rider. Deferred income taxes not sub ject to normalization rules were written off. The Commission granted the rehearing requests of IGS and RESA for further consideration. Duke Energy Ohio cannot predict the outcome of this matter. Midwest Propane Caverns Duke Energy Ohio used propane stored in caverns to meet peak demand during winter for several decades. Because the Central Corridor Project is complete and placed in service, the propane peaking facilities will no longer be necessary and have been retired. On October 7, 2021, Duke Energy Ohio requested deferral treatment of the property, plant and equipment as well as costs related to propane inventory and decommissioning costs. On January 6, 2022, the Staff issued a report recommending deferral authority for costs related to propane inventory and decommissioning costs, but not for the net book value of the remaining plant assets. As a result of the Staff's report, Duke Energy Ohio recorded a $19 million charge to Impairment of assets and other charges on the Condensed Consolidated Statements of Operations and Comprehensive Income in the fourth quarter of 2021. A Stipulation and Recommendation was filed jointly by Duke Energy Ohio and the Staff on April 27, 2022, recommending, among other things, approval of deferral treatment of a portion of the net book value of the property, plant and equipment prior to the 2021 impairment at the time of the next natural gas base rate case, excluding operations and maintenance savings, decommissioning costs not to exceed $7 million and costs related to propane inventory. The Stipulation and Recommendation states that Duke Energy Ohio will seek recovery of the deferral through its next natural gas base rate case proceeding with a proposed amortization period of at least 10 years and include an independent engineering study analyzing the necessity and prudency of the incremental investments made at the facilities since March 31, 2012. Duke Energy Ohio will not seek a return on the deferred amounts. Duke Energy Ohio cannot predict the outcome of this matter. Duke Energy Indiana 2019 Indiana Rate Case On July 2, 2019, Duke Energy Indiana filed a general rate case with the IURC for a rate increase for retail customers of approximately $395 million. The rebuttal case, filed on December 4, 2019, updated the requested revenue requirement to result in a 15.6% or $396 million average retail rate increase, including the impacts of the Utility Receipts Tax. Hearings concluded on February 7, 2020. On June 29, 2020, the IURC issued an order in the rate case approving a revenue increase of $146 million before certain adjustments and ratemaking refinements. The order approved Duke Energy Indiana’s requested forecasted rate base of $10.2 billion as of December 31, 2020, including the Edwardsport Integrated Gasification Combined Cycle (IGCC) Plant. The IURC reduced Duke Energy Indiana’s request by slightly more than $200 million, when accounting for the utility receipts tax and other adjustments. Approximately 50% of the reduction was due to a prospective change in depreciation and use of regulatory asset for the end-of-life inventory at retired generating plants, approximately 20% was due to the approved ROE of 9.7% versus the requested ROE of 10.4% and approximately 20% was related to miscellaneous earnings neutral adjustments. Step one rates were estimated to be approximately 75% of the total and became effective on July 30, 2020. Step two rates estimated to be the remaining 25% of the total rate increase were approved on July 28, 2021, and implemented in August 2021. Several groups appealed the IURC order to the Indiana Court of Appeals. Appellate briefs were filed on October 14, 2020, focusing on three issues: wholesale sales allocations, coal ash basin cost recovery and the Edwardsport IGCC operating and maintenance expense level approved. The Indiana Court of Appeals affirmed the IURC decision on May 13, 2021. The Indiana Office of Utility Consumer Counselor (OUCC) and the Duke Industrial Group filed a joint petition to transfer the rate case appeal to the Indiana Supreme Court on June 28, 2021. The Indiana Supreme Court issued its opinion on March 10, 2022, finding that the IURC erred in allowing Duke Energy Indiana to recover coal ash costs incurred before the IURC’s rate case order in June 2020. The Indiana Supreme Court found that allowing Duke Energy Indiana to recover coal ash costs incurred between rate cases that exceeded the amount built into base rates violated the prohibition against retroactive ratemaking. The IURC’s order has been remanded to the IURC for additional proceedings consistent with the Indiana Supreme Court’s opinion. As a result of the court's opinion, Duke Energy Indiana recognized pretax charges of approximately $211 million to Impairment of assets and other charges and $46 million to Operating revenues in the Condensed Consolidated Statements of Operations for the six months ended June 30, 2022. D uke Energy Indiana filed a request for rehearing with the Supreme Court on April 11, 2022, which the court denied on May 26, 2022. Duke Energy Indiana expects to file its testimony in the remand proceeding on August 18, 2022 . Duke Energy Indiana cannot predict the outcome of this matter. 2020 Indiana Coal Ash Recovery Case In Duke Energy Indiana’s 2019 rate case, the IURC also opened a subdocket for post-2018 coal ash related expenditures. Duke Energy Indiana filed testimony on April 15, 2020, in the coal ash subdocket requesting recovery for the post-2018 coal ash basin closure costs for plans that have been approved by the Indiana Department of Environmental Management (IDEM) as well as continuing deferral, with carrying costs, on the balance. An evidentiary hearing was held on September 14, 2020. Briefing was completed by mid-September 2021. On November 3, 2021, the IURC issued an order allowing recovery for post-2018 coal ash basin closure costs for the plans that have been approved by IDEM, as well as continuing deferral, with carrying costs, on the balance. The OUCC filed a notice of appeal to the Indiana Court of Appeals on December 3, 2021. The OUCC also argued in Duke Energy Indiana’s Environmental Compliance Rider proceeding, which was filed on March 31, 2022, that coal ash related expenditures incurred prior to the subdocket order date should be disallowed and likely intends to make similar arguments in its appeal of this subdocket. Duke Energy Indiana cannot predict the outcome of this matter. TDSIC 2.0 On November 23, 2021, Duke Energy Indiana filed for approval of the Transmission, Distribution, Storage Improvement Charge 2.0 investment plan for 2023-2028 (TDSIC 2.0). On June 15, 2022, the IURC approved, without modification, TDSIC 2.0, which includes approximately $2 billion in transmission and distribution investments selected to improve reliability to our customers, harden and improve resiliency of the grid, enable expansion of renewable and distributed energy projects and encourage economic development. In addition, the IURC set up a subdocket to consider the targeted economic development project, which the IURC approved on March 2, 2022. On July 15, 2022, the OUCC filed a notice of appeal in Duke Energy Indiana’s TDSIC 2.0 proceeding. Other parties are currently intervening in the appeal and briefing schedule has not yet been set. Duke Energy Indiana cannot predict the outcome of this matter. Piedmont 2022 South Carolina Rate Case On April 1, 2022, Piedmont filed an application with the PSCSC for a rate increase for retail customers of approximately $7 million, which represents an approximate 3.4% increase in retail revenues. The rate increase is driven by customer growth and infrastructure upgrade investments (plant additions) since Piedmont’s last proceeding in 2021 under South Carolina’s Rate Stabilization Act. In addition, Piedmont agreed with the South Carolina Office of Regulatory Staff in 2019 to file a general rate case no later than April 1, 2022, to conduct a more comprehensive review of rates including the allocation of costs to residential, commercial and industrial customers. In addition to the South Carolina Office of Regulatory Staff, the South Carolina Department of Consumer Affairs and the South Carolina Energy Users Committee intervened in the case and filed testimony on July 12, 2022, each recommending downward adjustments relating to several issues, including return on equity, capital structure, depreciation and employee compensation. Piedmont filed rebuttal testimony on July 26, 2022. The PSCSC has scheduled an evidentiary hearing for the week of August 15, 2022. Piedmont cannot predict the outcome of this matter. OTHER REGULATORY MATTERS Potential Coal Plant Retirements The Subsidiary Registrants periodically file integrated resource plans (IRPs) with their state regulatory commissions. The IRPs provide a view of forecasted energy needs over a long term (10 to 20 years) and options being considered to meet those needs. IRPs filed by the Subsidiary Registrants included planning assumptions to potentially retire certain coal-fired generating facilities in North Carolina and Indiana earlier than their current estimated useful lives. Duke Energy continues to evaluate the potential need to retire these coal-fired generating facilities earlier than the current estimated useful lives and plans to seek regulatory recovery for amounts that would not be otherwise recovered when any of these assets are retired. The table below contains the net carrying value of generating facilities planned for retirement or included in recent IRPs as evaluated for potential retirement. Dollar amounts in the table below are included in Net property, plant and equipment on the Condensed Consolidated Balance Sheets as of June 30, 2022, and exclude capitalized asset retirement costs. Remaining Net Capacity Book Value (in MW) (in millions) Duke Energy Carolinas Allen Steam Station Unit 1 (a) 167 $ 12 Allen Steam Station Unit 5 (b) 259 265 Cliffside Unit 5 (b) 546 362 Duke Energy Progress Mayo Unit 1 (b) 713 634 Roxboro Units 3-4 (b) 1,409 443 Duke Energy Florida Crystal River Units 4-5 (c) 1,442 1,615 Duke Energy Indiana Gibson Units 1-5 (d) 2,845 2,058 Cayuga Units 1-2 (d) 1,005 660 Total Duke Energy 8,386 $ 6,049 (a) As part of the 2015 resolution of a lawsuit involving alleged New Source Review violations, Duke Energy Carolinas must retire Allen Steam Station Unit 1 by December 31, 2024. The long-term energy options considered in the IRP could result in retirement of this unit earlier than its current estimated useful life. (b) These units were inc luded in the IRP filed by Duke Energy Carolinas and Duke Energy Progress in North Carolina and South Carolina on September 1, 2020. The long-term energy options considered in the IRP could result in retirement of these units earlier than their current estimated useful lives. (c) On January 14, 2021, Duke Energy Florida filed the 2021 Settlement agreement with the FPSC, which proposed depreciation rates reflecting retirement dates for Duke Energy Florida's last two coal-fired generating facilities, Crystal River Units 4-5, eight years ahead of sch

Commitments and Contingencies

Commitments and Contingencies	6 Months Ended
	Jun. 30, 2022
Commitments and Contingencies Disclosure [Abstract]
Commitments And Contingencies	COMMITMENTS AND CONTINGENCIES ENVIRONMENTAL The Duke Energy Registrants are subject to federal, state and local regulations regarding air and water quality, hazardous and solid waste disposal, coal ash and other environmental matters. These regulations can be changed from time to time, imposing new obligations on the Duke Energy Registrants. The following environmental matters impact all Duke Energy Registrants. Remediation Activities In addition to AROs recorded as a result of various environmental regulations, the Duke Energy Registrants are responsible for environmental remediation at various sites. These include certain properties that are part of ongoing operations and sites formerly owned or used by Duke Energy entities. These sites are in various stages of investigation, remediation and monitoring. Managed in conjunction with relevant federal, state and local agencies, remediation activities vary based upon site conditions and location, remediation requirements, complexity and sharing of responsibility. If remediation activities involve joint and several liability provisions, strict liability, or cost recovery or contribution actions, the Duke Energy Registrants could potentially be held responsible for environmental impacts caused by other potentially responsible parties and may also benefit from insurance policies or contractual indemnities that cover some or all cleanup costs. Liabilities are recorded when losses become probable and are reasonably estimable. The total costs that may be incurred cannot be estimated because the extent of environmental impact, allocation among potentially responsible parties, remediation alternatives and/or regulatory decisions have not yet been determined at all sites. Additional costs associated with remediation activities are likely to be incurred in the future and could be significant. Costs are typically expensed as Operation, maintenance and other on the Condensed Consolidated Statements of Operations unless regulatory recovery of the costs is deemed probable. The following table contains information regarding reserves for probable and estimable costs related to the various environmental sites. These reserves are recorded in Other within Other Noncurrent Liabilities on the Condensed Consolidated Balance Sheets. (in millions) June 30, 2022 December 31, 2021 Reserves for Environmental Remediation Duke Energy $ 90 $ 88 Duke Energy Carolinas 24 19 Progress Energy 23 23 Duke Energy Progress 12 11 Duke Energy Florida 10 11 Duke Energy Ohio 33 34 Duke Energy Indiana 3 4 Piedmont 7 9 Additional losses in excess of recorded reserves that could be incurred for the stages of investigation, remediation and monitoring for environmental sites that have been evaluated at this time are not material. LITIGATION D uke Energy Michael Johnson et al. v. Duke Energy Corporation et al. On September 23, 2020, plaintiff Michael Johnson, a former Duke Energy employee and participant in the Duke Energy Retirement Savings Plan (Plan) brought suit on his own behalf and on behalf of other participants and beneficiaries similarly situated against Duke Energy Corporation, the Duke Energy Benefits Committee, and other unnamed individual defendants. The complaint, which was subsequently amended to add a current participant as a plaintiff on November 23, 2020, alleges that the defendants breached their fiduciary duties with respect to certain fees associated with the Plan in violation of the Employee Retirement Income Security Act of 1974 and seeks certification of a class of all individuals who were participants or beneficiaries of the Plan at any time on or after September 23, 2014. The defendants filed a motion to dismiss the plaintiffs’ amended complaint on December 18, 2020. On January 31, 2022, the court denied the defendants' motion to dismiss. On February 28, 2022, Duke Energy responded to the amended complaint. Discovery commenced and the parties exchanged preliminary disclosures. After review of these disclosures, the plaintiff agreed to voluntarily dismiss its suit and the parties subsequently filed a joint stipulation of voluntary dismissal with prejudice on April 29, 2022, ending this litigation. Texas Storm Uri Tort Litigation Several Duke Energy renewables project companies, located in the ERCOT market, were named in lawsuits arising out of Texas Storm Uri in mid-February 2021. Duke Energy Corporation, which had originally been named in several suits, was dismissed from the lawsuits. The lawsuits against the Duke Energy renewables project companies seek recovery for property damages, personal injury and for wrongful death allegedly caused by the power outages, which the plaintiffs claim was the result of collective failures of generators, transmission and distribution operators, retail energy providers and others, including ERCOT. The cases have been consolidated into a Texas state court multidistrict litigation (MDL) proceeding for discovery and pre-litigation purposes. Five MDL cases have been designated for motions to dismiss while all other cases are stayed. Duke Energy renewables projects are named as defendants in three of these five cases. Plaintiffs in these five cases have filed amended petitions, which are subject to renewed omnibus motions to dismiss. The parties' briefing on omnibus motions to dismiss should be completed by September 2022 and will focus on lack of duty, tariff defenses and sovereign immunity. Decisions on these motions will be applicable to all of the stayed cases. Duke Energy cannot predict the outcomes of these matters. Duke Energy Carolinas Ruben Villano, et al. v. Duke Energy Carolinas, LLC On June 16, 2021, a group of nine individuals went over a low head dam adjacent to the Dan River Steam Station in Eden, North Carolina, while water tubing. Emergency personnel rescued four people and five others were confirmed deceased. On August 11, 2021, Duke Energy Carolinas was served with the complaint filed in Durham County Superior Court on behalf of four survivors, which was later amended to include all the decedents along with the survivors, except for one minor. The lawsuit alleges that Duke Energy Carolinas knew that the river was used for recreational purposes and that Duke Energy did not adequately warn about the dam, and that Duke Energy Carolinas created a dangerous and hidden hazard on the Dan River in building and maintaining the low head dam. On September 30, 2021, Duke Energy Carolinas filed its motion to dismiss and motion for transfer of venue from Durham County to Rockingham County, both of which were denied on November 15, 2021. On November 15, 2021, Duke Energy Carolinas was also served with Plaintiffs Second Amended Complaint, which added the final minor plaintiff and consolidated all the actions into one lawsuit. Duke Energy Carolinas has filed its Answer and Affirmative Defenses to the Second Amended Complaint. Mediation is scheduled for December 2022. Discovery has commenced and is scheduled to be completed on or before February 28, 2023. The case is scheduled to be trial-ready by April 24, 2023. Duke Energy Carolinas cannot predict the outcome of this matter. NTE Carolinas II, LLC Litigation In November 2017, Duke Energy Carolinas entered into a standard FERC large generator interconnection agreement (LGIA) with NTE Carolinas II, LLC (NTE), a company that proposed to build a combined-cycle natural gas plant in Rockingham County, North Carolina. On September 6, 2019, Duke Energy Carolinas filed a lawsuit in Mecklenburg County Superior Court against NTE for breach of contract, alleging that NTE's failure to pay benchmark payments for Duke Energy Carolinas' transmission system upgrades required under the interconnection agreement constituted a termination of the interconnection agreement. Duke Energy Carolinas is seeking a monetary judgment against NTE because NTE failed to make multiple milestone payments. The lawsuit was moved to federal court in North Carolina. NTE filed a motion to dismiss Duke Energy Carolinas’ complaint and brought counterclaims alleging anti-competitive conduct and violations of state and federal statutes. Duke Energy Carolinas filed a motion to dismiss NTE's counterclaims. On May 21, 2020, in response to a NTE petition challenging Duke Energy Carolinas' termination of the LGIA, FERC issued a ruling that 1) it has exclusive jurisdiction to determine whether a transmission provider may terminate a LGIA; 2) FERC approval is required to terminate a conforming LGIA if objected to by the interconnection customer; and 3) Duke Energy may not announce the termination of a conforming LGIA unless FERC has approved the termination. FERC's Office of Enforcement also initiated an investigation of Duke Energy Carolinas into matters pertaining to the LGIA. Duke Energy Carolinas is cooperating with the Office of Enforcement but cannot predict the outcome of this investigation. On August 17, 2020, the court denied both NTE’s and Duke Energy Carolinas’ motions to dismiss. In October 2021, NTE filed a Second Amended Counterclaim and Complaint, and in January 2022, NTE filed a Third Amended Counterclaim and Complaint. Duke Energy Carolinas has responded to these pleadings. On December 6, 2021, Duke Energy Carolinas filed an Amended Complaint. Following completion of discovery, Duke Energy Carolinas filed a motion for summary judgment seeking a ruling in its favor as to some of its affirmative claims against NTE and to all of NTE’s counterclaims. On June 24, 2022, the court issued an order partially granting Duke Energy Carolinas' motion by dismissing NTE's counterclaims that Duke Energy Carolinas engaged in anti-competitive behavior that violated various federal and state antitrust and deceptive trade practices statutes. The remaining claims in the litigation are Duke Energy Carolinas' original claims against NTE and NTE's claims for declaratory judgment and breach of contract. Trial on these remaining claims is scheduled to begin on October 11, 2022. Duke Energy Carolinas cannot predict the outcome of this matter. Asbestos-related Injuries and Damages Claims Duke Energy Carolinas has experienced numerous claims for indemnification and medical cost reimbursement related to asbestos exposure. These claims relate to damages for bodily injuries alleged to have arisen from exposure to or use of asbestos in connection with construction and maintenance activities conducted on its electric generation plants prior to 1985. Duke Energy Caroli nas has recognized asbestos-related reserves of $488 million at June 30, 2022, and $501 million at December 31, 2021. These reserves are classified in Other within Other Noncurrent Liabilities and Other within Current Liabilities on the Condensed Consolidated Balance Sheets. These reserves are based upon Duke Energy Carolinas' best estimate for current and future asbestos claims through 2041 and are recorded on an undiscounted basis. In light of the uncertainties inherent in a longer-term forecast, management does not believe they can reasonably estimate the indemnity and medical costs that might be incurred after 2041 related to such potential claims. It is possible Duke Energy Carolinas may incur asbestos liabilities in excess of the recorded reserves. Duke Energy Carolinas has third-party insurance to cover certain losses related to asbestos-related injuries and damages above an aggregate self-insured retention. Receivables for insurance recoveries were $644 million at June 30, 2022, and $644 million at December 31, 2021. These amounts are classified in Other within Other Noncurrent Assets and Receivables within Current Assets on the Condensed Consolidated Balance Sheets. Any future payments up to the policy limit will be reimbursed by the third-party insurance carrier. Duke Energy Carolinas is not aware of any uncertainties regarding the legal sufficiency of insurance claims. Duke Energy Carolinas believes the insurance recovery asset is probable of recovery as the insurance carrier continues to have a strong financial strength rating. The reserve for credit losses for insurance receivables is $12 million for Duke Energy and Duke Energy Carolinas as of June 30, 2022, and December 31, 2021. The insurance receivable is evaluated based on the risk of default and the historical losses, current conditions and expected conditions around collectability. Management evaluates the risk of default annually based on payment history, credit rating and changes in the risk of default from credit agencies. Duke Energy Progress and Duke Energy Florida Spent Nuclear Fuel Matters On June 18, 2018, Duke Energy Progress and Duke Energy Florida sued the U.S. in the U.S. Court of Federal Claims for damages incurred for the period 2014 through 2018. The lawsuit claimed the DOE breached a contract in failing to accept spent nuclear fuel under the Nuclear Waste Policy Act of 1982 and asserted damages for the cost of on-site storage in the amount of $100 million and $200 million for Duke Energy Progress and Duke Energy Florida, respectively. On March 30, 2022, the DOE and Duke Energy Progress executed a settlement agreement, pursuant to which Duke Energy Progress will receive damages for costs incurred between 2014 and 2018, and will be able to submit future costs on a defined schedule. In April 2022, Duke Energy Progress received $87 million in proceeds that related to damages incurred in 2014 through 2018. On May 2, 2022, the DOE and Duke Energy Florida executed a settlement agreement, pursuant to which Duke Energy Florida will receive damages for costs incurred between 2014 and 2018, and will be able to submit costs incurred in 2019 and 2020 pursuant to an audit process. In June 2022, Duke Energy Florida received $180 million in proceeds that related to damages incurred in 2014 through 2018. Duke Energy Indiana Coal Ash Basin Closure Plan Appeal On January 27, 2020, Hoosier Environmental Council (HEC) filed a Petition for Administrative Review with the Indiana Office of Environmental Adjudication challenging the Indiana Department of Environmental Management’s (IDEM's) December 10, 2019, partial approval of Duke Energy Indiana’s ash pond closure plan at Duke Energy's Gallagher power station. After hearing oral arguments in early April 2021 on Duke Energy Indiana's and HEC's competing Motions for Summary Judgment, on May 4, 2021, the administrative court rejected all of HEC’s claims and issued a ruling in favor of Duke Energy Indiana. On June 3, 2021, HEC filed an appeal in Superior Court to seek judicial review of the order . On June 25, 2021, Duke Energy Indiana filed its response to the Petition to Review. On August 30, 2021, HEC served Duke Energy Indiana with its Brief in Support of Petition for Judicial Review. On October 29, 2021, Duke Energy Indiana and IDEM filed their response briefs. On December 13, 2021, HEC filed and served its Reply Brief. On January 11, 2022, Duke Energy Indiana received a compliance obligation letter from the Environmental Protection Agency (EPA) notifying the company that the two basins at issue in the litigation are subject to requirements of the CCR Rule. The letter does not provide a deadline for compliance. Duke Energy Indiana is evaluating the EPA letter, its potential impacts on the litigation and the extent to which this letter could apply to CCR surface impoundments at its other Indiana sites. Following the January 11, 2022 EPA notice of compliance letter, the parties filed a joint motion to stay the litigation for 45 days, which was approved by the court. As a result, the oral argument scheduled for February 1, 2022, was postponed. Duke Energy Indiana and HEC engaged in settlement discussions, but the parties were unable to reach resolution. On April 21, 2022, HEC filed a Motion to Lift Stay and Motion for Judicial Notice. HEC also requested that the court hold a hearing within 45 days and also take judicial notice of the EPA's January 11, 2022 letter. On April 22, 2022, Duke Energy Indiana sent IDEM a letter withdrawing the closure plans for the Gallagher North Ash Pond and Primary Pond Ash Fill. After acknowledgment by IDEM of withdrawal of these closure plans, Duke Energy Indiana filed a Motion to Dismiss the litigation as moot on April 28, 2022, which IDEM supported, and the court granted the Motion to Dismiss on July 8, 2022. Coal Ash Insurance Coverage Litigation In June 2022, Duke Energy Indiana filed a civil action in Indiana Superior Court against various insurance companies seeking declaratory relief with respect to insurance coverage for coal combustion residuals-related expenses and liabilities covered by third-party liability insurance policies. The insurance policies cover the 1969-1972 and 1984-1985 periods and provide third-party liability insurance for claims and suits alleging property damage, bodily injury and personal injury (or a combination thereof). Duke Energy Indiana cannot predict the outcome of this matter. Other Litigation and Legal Proceedings The Duke Energy Registrants are involved in other legal, tax and regulatory proceedings arising in the ordinary course of business, some of which involve significant amounts. The Duke Energy Registrants believe the final disposition of these proceedings will not have a material effect on their results of operations, cash flows or financial position. Reserves are classified on the Condensed Consolidated Balance Sheets in Other within Other Noncurrent Liabilities and Other within Current Liabilities. OTHER COMMITMENTS AND CONTINGENCIES General As part of their normal business, the Duke Energy Registrants are party to various financial guarantees, performance guarantees and other contractual commitments to extend guarantees of credit and other assistance to various subsidiaries, investees and other third parties. These guarantees involve elements of performance and credit risk, which are not fully recognized on the Condensed Consolidated Balance Sheets and have uncapped maximum potential payments. However, the Duke Energy Registrants do not believe these guarantees will have a material effect on their results of operations, cash flows or financial position. In addition, the Duke Energy Registrants enter into various fixed-price, noncancelable commitments to purchase or sell power or natural gas, take-or-pay arrangements, transportation, or throughput agreements and other contracts that may or may not be recognized on their respective Condensed Consolidated Balance Sheets. Some of these arrangements may be recognized at fair value on their respective Condensed Consolidated Balance Sheets if such contracts meet the definition of a derivative and the NPNS exception does not apply. In most cases, the Duke Energy Registrants’ purchase obligation contracts contain provisions for price adjustments, minimum purchase levels and other financial commitments.

Debt and Credit Facilities

Debt and Credit Facilities	6 Months Ended
	Jun. 30, 2022
Debt Disclosure [Abstract]
Debt And Credit Facilities	DEBT AND CREDIT FACILITIES SUMMARY OF SIGNIFICANT DEBT ISSUANCES The following table summarizes significant debt issuances (in millions). Six Months Ended June 30, 2022 Duke Duke Duke Maturity Interest Duke Energy Energy Energy Issuance Date Date Rate Energy (Parent) Carolinas Progress Piedmont Unsecured Debt May 2022 (a) May 2052 5.050 % $ 400 $ — $ — $ — $ 400 June 2022 (b) June 2028 4.750 % 645 645 — — — June 2022 (b) June 2034 5.306 % 537 537 — — — First Mortgage Bonds March 2022 (c) March 2032 2.850 % 500 — 500 — — March 2022 (c) March 2052 3.550 % 650 — 650 — — March 2022 (c) April 2032 3.400 % 500 — — 500 — March 2022 (c) April 2052 4.000 % 400 — — 400 — Tax-exempt Bonds June 2022 (d) September 2030 4.000 % 168 168 — — — June 2022 (d) November 2039 4.250 % 234 234 — — — Total issuances $ 4,034 $ 1,584 $ 1,150 $ 900 $ 400 (a) Proceeds will be used to pay down a portion of outstanding intercompany short-term debt and for general corporate purposes (b) Duke Energy (Parent) issued 600 million euros aggregate principal amount of 3.10% senior notes due June 2028 and 500 million euros aggregate principal amount of 3.85% senior notes due June 2034. Proceeds will be used to repay a $500 million debt maturity, pay down short-term debt and for general corporate purposes. Duke Energy's obligations under its euro-denominated fixed-rate notes were effectively converted to fixed-rate U.S. dollars at issuance through cross-currency swaps, mitigating foreign currency exchange risk associated with the interest and principal payments. See Note 8 for additional information. (c) Proceeds will be used to finance or refinance, in whole or in part, existing or new eligible projects under the sustainable financing framework. (d) Proceeds were used to refund the Ohio Air Quality Development Revenue Refunding bonds, previously held in treasury, which were used to finance or refinance portions of certain solid waste disposal facilities. The mandatory purchase date of these bonds is June 1, 2027. CURRENT MATURITIES OF LONG-TERM DEBT The following table shows the significant components of Current maturities of long-term debt on the Condensed Consolidated Balance Sheets. The Duke Energy Registrants currently anticipate satisfying these obligations with cash on hand and proceeds from additional borrowings. (in millions) Maturity Date Interest Rate June 30, 2022 Unsecured Debt (a) Duke Energy (Parent) August 2022 2.400 % 500 Duke Energy (Parent) April 2023 2.875 % 350 Duke Energy (Parent) (b) June 2023 1.938 % 500 First Mortgage Bonds Duke Energy Carolinas March 2023 2.500 % 500 Duke Energy Carolinas March 2023 3.050 % 500 Other (c) 821 Current maturities of long-term debt $ 3,171 (a) In May 2022, Duke Energy (Parent) early retired $500 million of unsecured debt with an original maturity date of August 2022. (b) Debt has a floating interest rate. (c) Includes finance lease obligations, amortizing debt, tax-exempt bonds with mandatory put options and small bullet maturities. AVAILABLE CREDIT FACILITIES Master Credit Facility In March 2022, Duke Energy amended its existing Master Credit Facility to increase the amount of the facility from $8 billion to $9 billion and to extend the termination date to March 2027. The Duke Energy Registrants, excluding Progress Energy, have borrowing capacity under the Master Credit Facility up to a specified sublimit for each borrower. Duke Energy has the unilateral ability at any time to increase or decrease the borrowing sublimits of each borrower, subject to a maximum sublimit for each borrower. The amount available under the Master Credit Facility has been reduced to backstop issuances of commercial paper, certain letters of credit and variable-rate demand tax-exempt bonds that may be put to the Duke Energy Registrants at the option of the holder. The table below includes the current borrowing sublimits and available capacity under these credit facilities. June 30, 2022 Duke Duke Duke Duke Duke Duke Duke Energy Energy Energy Energy Energy Energy (in millions) Energy (Parent) Carolinas Progress Florida Ohio Indiana Piedmont Facility size (a) $ 9,000 $ 3,150 $ 1,225 $ 1,200 $ 1,100 $ 775 $ 750 $ 800 Reduction to backstop issuances Commercial paper (b) (3,516) (1,853) (326) (150) (458) (299) (400) (30) Outstanding letters of credit (38) (25) (4) (2) (7) — — — Tax-exempt bonds (81) — — — — — (81) — Available capacity under the Master Credit Facility $ 5,365 $ 1,272 $ 895 $ 1,048 $ 635 $ 476 $ 269 $ 770 (a) Represents the sublimit of each borrower. (b) Duke Energy issued $625 million of commercial paper and loaned the proceeds through the money pool to Duke Energy Carolinas, Duke Energy Progress, Duke Energy Ohio and Duke Energy Indiana. The balances are classified as Long-Term Debt Payable to Affiliated Companies on the Condensed Consolidated Balance Sheets. Other Credit Facilities Duke Energy (Parent) Term Loan Facility On March 9, 2022, Duke Energy (Parent) entered into a Term Loan Credit Agreement (Credit Agreement) with commitments totaling $1.4 billion maturing March 9, 2024. The maturity date of the Credit Agreement may be extended for up to two years by request of Duke Energy (Parent), upon satisfaction of certain conditions contained in the Credit Agreement. Borrowings under the facility were used to repay amounts drawn under the Three-Year Revolving Credit Facility and for general corporate purposes, including repayment of a portion of Duke Energy's outstanding commercial paper. The balance is classified as Long-Term Debt on Duke Energy's Condensed Consolidated Balance Sheets. The Three-Year Revolving Credit Facility was terminated in March 2022. Intercompany Credit Agreements In March 2022, Progress Energy closed a revolving credit agreement with Duke Energy (Parent), which allowed up to $2.5 billion in intercompany borrowings.

Goodwill

Goodwill	6 Months Ended
	Jun. 30, 2022
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill	GOODWILL Duke Energy The following table presents the goodwill by reportable segment included on Duke Energy's Condensed Consolidated Balance Sheets at June 30, 2022, and December 31, 2021. Electric Utilities Gas Utilities Commercial (in millions) and Infrastructure and Infrastructure Renewables Total Goodwill balance $ 17,379 $ 1,924 $ 122 $ 19,425 Accumulated impairment charges — — (122) (122) Goodwill, adjusted for accumulated impairment charges $ 17,379 $ 1,924 $ — $ 19,303 Duke Energy Ohio Duke Energy Ohio's Goodwill balance of $920 million, allocated $596 million to Electric Utilities and Infrastructure and $324 million to Gas Utilities and Infrastructure, is presented net of accumulated impairment charges of $216 million on the Condensed Consolidated Balance Sheets at June 30, 2022, and December 31, 2021. Progress Energy Progress Energy's Goodwill is included in the Electric Utilities and Infrastructure segment and there are no accumulated impairment charges. Piedmont Piedmont's Goodwill is included in the Gas Utilities and Infrastructure segment and there are no accumulated impairment charges.

Related Party Transactions

Related Party Transactions	6 Months Ended
	Jun. 30, 2022
Related Party Transactions [Abstract]
Related Party Transactions	RELATED PARTY TRANSACTIONS The Subsidiary Registrants engage in related party transactions in accordance with applicable state and federal commission regulations. Refer to the Condensed Consolidated Balance Sheets of the Subsidiary Registrants for balances due to or due from related parties. Material amounts related to transactions with related parties included on the Condensed Consolidated Statements of Operations and Comprehensive Income are presented in the following table. Three Months Ended June 30, Six Months Ended June 30, (in millions) 2022 2021 2022 2021 Duke Energy Carolinas Corporate governance and shared service expenses (a) $ 191 $ 243 $ 397 $ 446 Indemnification coverages (b) 7 6 14 12 Joint Dispatch Agreement (JDA) revenue (c) 12 13 38 26 JDA expense (c) 173 25 267 65 Intercompany natural gas purchases (d) 5 15 9 29 Progress Energy Corporate governance and shared service expenses (a) $ 184 $ 233 $ 380 $ 414 Indemnification coverages (b) 11 11 22 21 JDA revenue (c) 173 25 267 65 JDA expense (c) 12 13 38 26 Intercompany natural gas purchases (d) 19 18 38 37 Duke Energy Progress Corporate governance and shared service expenses (a) $ 108 $ 141 $ 227 $ 246 Indemnification coverages (b) 5 5 10 10 JDA revenue (c) 173 25 267 65 JDA expense (c) 12 13 38 26 Intercompany natural gas purchases (d) 19 18 38 37 Duke Energy Florida Corporate governance and shared service expenses (a) $ 76 $ 92 $ 153 $ 168 Indemnification coverages (b) 6 6 12 11 Duke Energy Ohio Corporate governance and shared service expenses (a) $ 82 $ 79 $ 164 $ 158 Indemnification coverages (b) 1 1 2 2 Duke Energy Indiana Corporate governance and shared service expenses (a) $ 91 $ 93 $ 215 $ 206 Indemnification coverages (b) 2 2 4 4 Piedmont Corporate governance and shared service expenses (a) $ 37 $ 36 $ 72 $ 69 Indemnification coverages (b) 2 1 3 2 Intercompany natural gas sales (d) 24 33 47 66 Natural gas storage and transportation costs (e) 5 5 11 11 (a) The Subsidiary Registrants are charged their proportionate share of corporate governance and other shared services costs, primarily related to human resources, employee benefits, information technology, legal and accounting fees, as well as other third-party costs. These amounts are primarily recorded in Operation, maintenance and other and Impairment of assets and other charges on the Condensed Consolidated Statements of Operations and Comprehensive Income. (b) The Subsidiary Registrants incur expenses related to certain indemnification coverages through Bison, Duke Energy’s wholly owned captive insurance subsidiary. These expenses are recorded in Operation, maintenance and other on the Condensed Consolidated Statements of Operations and Comprehensive Income. (c) Duke Energy Carolinas and Duke Energy Progress participate in a JDA, which allows the collective dispatch of power plants between the service territories to reduce customer rates. Revenues from the sale of power and expenses from the purchase of power pursuant to the JDA are recorded in Operating Revenues and Fuel used in electric generation and purchased power, respectively, on the Condensed Consolidated Statements of Operations and Comprehensive Income. (d) Piedmont provides long-term natural gas delivery service to certain Duke Energy Carolinas and Duke Energy Progress natural gas-fired generation facilities. Piedmont records the sales in Operating Revenues, and Duke Energy Carolinas and Duke Energy Progress record the related purchases as a component of Fuel used in electric generation and purchased power on their respective Condensed Consolidated Statements of Operations and Comprehensive Income. (e) Piedmont has related party transactions as a customer of its equity method investments in Pine Needle LNG Company, LLC, Hardy Storage Company, LLC and Cardinal Pipeline Company, LLC natural gas storage and transportation facilities. These expenses are included in Cost of natural gas on Piedmont's Condensed Consolidated Statements of Operations and Comprehensive Income. In addition to the amounts presented above, the Subsidiary Registrants have other affiliate transactions, including rental of office space, participation in a money pool arrangement, other operational transactions, such as pipeline lease arrangements, and their proportionate share of certain charged expenses. These transactions of the Subsidiary Registrants are incurred in the ordinary course of business and are eliminated in consolidation. As discussed in Note 11, certain trade receivables have been sold by Duke Energy Ohio and Duke Energy Indiana to CRC, an affiliate formed by a subsidiary of Duke Energy. The proceeds obtained from the sales of receivables are largely cash but do include a subordinated note from CRC for a portion of the purchase price. Intercompany Income Taxes Duke Energy and the Subsidiary Registrants file a consolidated federal income tax return and other state and jurisdictional returns. The Subsidiary Registrants have a tax sharing agreement with Duke Energy for the allocation of consolidated tax liabilities and benefits. Income taxes recorded represent amounts the Subsidiary Registrants would incur as separate C-Corporations. The following table includes the balance of intercompany income tax receivables and payables for the Subsidiary Registrants. Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Carolinas Energy Progress Florida Ohio Indiana Piedmont June 30, 2022 Intercompany income tax receivable $ 17 $ — $ — $ — $ 2 $ — $ 19 Intercompany income tax payable — 22 29 54 — 17 — December 31, 2021 Intercompany income tax receivable $ — $ — $ — $ 40 $ 19 $ — $ — Intercompany income tax payable 62 — 84 — — 10 27

Derivatives and Hedging

Derivatives and Hedging	6 Months Ended
	Jun. 30, 2022
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivatives and Hedging	DERIVATIVES AND HEDGING The Duke Energy Registrants use commodity, interest rate and foreign currency contracts to manage commodity price risk, interest rate risk and foreign currency exchange rate risk. The primary use of commodity derivatives is to hedge the generation portfolio against changes in the prices of electricity and natural gas. Piedmont enters into natural gas supply contracts to provide diversification, reliability and natural gas cost benefits to its customers. Interest rate derivatives are used to manage interest rate risk associated with borrowings. Foreign currency derivatives are used to manage risk related to foreign currency exchange rates on certain issuances of debt. All derivative instruments not identified as NPNS are recorded at fair value as assets or liabilities on the Condensed Consolidated Balance Sheets. Cash collateral related to derivative instruments ex ecuted under master netting arrangements is offset against the collateralized derivatives on the Condensed Consolidated Balance Sheets. The cash impacts of settled derivatives are recorded as operating activities or financing activities on the Condensed Consolidated Statements of Cash Flows consistent with the classification of the hedged transaction. INTEREST RATE RISK The Duke Energy Registrants are exposed to changes in interest rates as a result of their issuance or anticipated issuance of variable-rate and fixed-rate debt and commercial paper. Interest rate risk is managed by limiting variable-rate exposures to a percentage of total debt and by monitoring changes in interest rates. To manage risk associated with changes in interest rates, the Duke Energy Registrants may enter into interest rate swaps, U.S. Treasury lock agreements and other financial contracts. In anticipation of certain fixed-rate debt issuances, a series of forward-starting interest rate swaps or Treasury locks may be executed to lock in components of current market interest rates. These instruments are later terminated prior to or upon the issuance of the corresponding debt. Cash Flow Hedges For a derivative designated as hedging the exposure to variable cash flows of a future transaction, referred to as a cash flow hedge, the effective portion of the derivative's gain or loss is initially reported as a component of other comprehensive income and subsequently reclassified into earnings once the future transaction impacts earnings. Amounts for interest rate contracts are reclassified to earnings as interest expense over the term of the related debt. Gains and losses reclassified out of accumulated other comprehensive loss for the three and six months ended June 30, 2022, and 2021, were not material. Duke Energy's interest rate derivatives designated as hedges include interest rate swaps used to hedge existing debt within the Commercial Renewables segment and forward-starting interest rate swaps not accounted for under regulatory accounting. Undesignated Contracts Undesignated contracts primarily include contracts not designated as a hedge because they are accounted for under regulatory accounting or contracts that do not qualify for hedge accounting. Duke Energy’s interest rate swaps for its regulated operations employ regulatory accounting. With regulatory accounting, the mark-to-market gains or losses on the swaps are deferred as regulatory liabilities or regulatory assets, respectively. Regulatory assets and liabilities are amortized consistent with the treatment of the related costs in the ratemaking process. The accrual of interest on the swaps is recorded as Interest Expense on the Duke Energy Registrant's Condensed Consolidated Statements of Operations and Comprehensive Income. The following table shows notional amounts of outstanding derivatives related to interest rate risk. June 30, 2022 Duke Duke Duke Duke Energy Energy Energy (in millions) Energy Carolinas Indiana Ohio Cash flow hedges $ 2,877 $ — $ — $ — Undesignated contracts 577 250 300 27 Total notional amount (a) $ 3,454 $ 250 $ 300 $ 27 December 31, 2021 Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy (in millions) Energy Carolinas Energy Progress Indiana Ohio Cash flow hedges $ 2,415 $ — $ — $ — $ — $ — Undesignated contracts 1,177 350 500 500 300 27 Total notional amount (a) $ 3,592 $ 350 $ 500 $ 500 $ 300 $ 27 (a) Duke Energy includes amounts related to consolidated VIEs of $627 million and $665 million in cash flow hedges as of June 30, 2022, and December 31, 2021, respectively. COMMODITY PRICE RISK The Duke Energy Registrants are exposed to the impact of changes in the prices of electricity purchased and sold in bulk power markets and natural gas purchases, including Piedmont's natural gas supply contracts. Exposure to commodity price risk is influenced by a number of factors including the term of contracts, the liquidity of markets and delivery locations. To manage risk associated with commodity prices, the Duke Energy Registrants may enter into long-term power purchase or sales contracts and long-term natural gas supply agreements. Cash Flow Hedges For derivatives designated as hedging the exposure to variable cash flows of a future transaction, referred to as a cash flow hedge, the derivative's gain or loss is initially reported as a component of other comprehensive income and subsequently reclassified into earnings once the future transaction impacts earnings. Gains and losses reclassified out of accumulated other comprehensive loss for the three and six months ended June 30, 2022, and 2021, were not material. Duke Energy’s commodity derivatives designated as hedges include long-term electricity sales in the Commercial Renewables segment. Undesignated Contracts Undesignated contracts primarily include contracts not designated as a hedge because they are accounted for under regulatory accounting or contracts that do not qualify for hedge accounting. For the Subsidiary Registrants, bulk power electricity and natural gas purchases flow through fuel adjustment clauses, formula-based contracts or other cost-sharing mechanisms. Differences between the costs included in rates and the incurred costs, including undesignated derivative contracts, are largely deferred as regulatory assets or regulatory liabilities. Piedmont policies allow for the use of financial instruments to hedge commodity price risks. The strategy and objective of these hedging programs are to use the financial instruments to reduce natural gas costs volatility for customers. Duke Energy’s undesignated contracts include long-term electricity sales in the Commercial Renewables segment. Volumes The tables below include volumes of outstanding commodity derivatives. Amounts disclosed represent the absolute value of notional volumes of commodity contracts excluding NPNS. The Duke Energy Registrants have netted contractual amounts where offsetting purchase and sale contracts exist with identical delivery locations and times of delivery. Where all commodity positions are perfectly offset, no quantities are shown. June 30, 2022 Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy Carolinas Energy Progress Ohio Indiana Piedmont Electricity (GWh) (a) 39,032 — — — 4,002 24,241 — Natural gas (millions of dekatherms) 873 283 259 259 — 13 318 December 31, 2021 Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy Carolinas Energy Progress Ohio Indiana Piedmont Electricity (GWh) (a) 22,344 — — — 1,681 10,688 — Natural gas (millions of dekatherms) 823 264 215 215 — 8 336 (a) Duke Energy includes 4,477 GWh and 9,975 GWh related to cash flow hedges as of June 30, 2022, and December 31, 2021, respectively. FOREIGN CURRENCY RISK Duke Energy may enter into foreign currency derivatives to hedge exposure to changes in foreign currency exchange rates, such as that arising from the issuance of debt denominated in a currency other than U.S. dollars. Fair Value Hedges Derivatives related to existing fixed rate securities are accounted for as fair value hedges, where the derivatives’ fair value gains or losses and hedged items’ fair value gains or losses are both recorded directly to earnings on the same income statement line item, including foreign currency gains or losses arising from changes in the U.S. currency exchange rates. Duke Energy has elected to exclude the cross-currency basis spread from the assessment of effectiveness in the fair value hedges of its foreign currency risk and record any difference between the change in the fair value of the excluded components and the amounts recognized in earnings as a component of OCI. The following table shows Duke Energy's outstanding derivatives related to foreign currency risk. There were no fair value hedges in 2021. June 30, 2022 Receive Fair Value Pay Notional Notional Receive Hedge Gain (Loss) (a) (in millions) Pay Rate (in millions) Rate Maturity Date (in millions) Fair value hedges $ 645 4.75 % 600 euros 3.10 % June 2028 $ (16) 537 5.31 % 500 euros 3.85 % June 2034 (13) Total notional amount $ 1,182 1,100 euros $ (29) (a) Amounts are recorded in Other Income and expenses, net on the Condensed Consolidated Statement of Operations, which offsets an equal translation adjustment of the foreign denominated debt. See the Condensed Consolidated Statements of Comprehensive Income for amounts excluded from the assessment of effectiveness for which the difference between changes in fair value and periodic amortization is recorded. LOCATION AND FAIR VALUE OF DERIVATIVE ASSETS AND LIABILITIES RECOGNIZED ON THE CONDENSED CONSOLIDATED BALANCE SHEETS The following tables show the fair value and balance sheet location of derivative instruments. Although derivatives subject to master netting arrangements are netted on the Condensed Consolidated Balance Sheets, the fair values presented below are shown gross and cash collateral on the derivatives has not been netted against the fair values shown. Derivative Assets June 30, 2022 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Commodity Contracts Not Designated as Hedging Instruments Current $ 571 $ 268 $ 203 $ 203 $ — $ 5 $ 86 $ — Noncurrent 350 186 165 165 — — — — Total Derivative Assets – Commodity Contracts $ 921 $ 454 $ 368 $ 368 $ — $ 5 $ 86 $ — Interest Rate Contracts Designated as Hedging Instruments Current $ 242 $ — $ — $ — $ — $ — $ — $ — Noncurrent 88 — — — — — — — Not Designated as Hedging Instruments Current 55 — — — — — 55 — Noncurrent 30 30 — — — — — — Total Derivative Assets – Interest Rate Contracts $ 415 $ 30 $ — $ — $ — $ — $ 55 $ — Total Derivative Assets $ 1,336 $ 484 $ 368 $ 368 $ — $ 5 $ 141 $ — Derivative Liabilities June 30, 2022 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Commodity Contracts Designated as Hedging Instruments Current $ 35 $ — $ — $ — $ — $ — $ — — Noncurrent 114 — — — — — — — Not Designated as Hedging Instruments Current 135 32 33 1 33 — 21 25 Noncurrent 259 9 10 10 — — — 168 Total Derivative Liabilities – Commodity Contracts $ 543 $ 41 $ 43 $ 11 $ 33 $ — $ 21 $ 193 Interest Rate Contracts Designated as Hedging Instruments Current $ 1 $ — $ — $ — $ — $ — $ — $ — Noncurrent 2 — — — — — — — Not Designated as Hedging Instruments Current 1 — — — — 1 — — Noncurrent 2 — — — — 2 — — Total Derivative Liabilities – Interest Rate Contracts $ 6 $ — $ — $ — $ — $ 3 $ — $ — Foreign Currency Contracts Designated as Hedging Instruments Current $ 18 $ — $ — $ — $ — $ — $ — $ — Noncurrent 26 — — — — — — — Total Derivative Liabilities – Foreign Currency Contracts $ 44 $ — $ — $ — $ — $ — $ — $ — Total Derivative Liabilities $ 593 $ 41 $ 43 $ 11 $ 33 $ 3 $ 21 $ 193 Derivative Assets December 31, 2021 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Commodity Contracts Not Designated as Hedging Instruments Current $ 199 $ 99 $ 72 $ 72 $ — $ 2 $ 23 $ 3 Noncurrent 113 63 50 50 — — — — Total Derivative Assets – Commodity Contracts $ 312 $ 162 $ 122 $ 122 $ — $ 2 $ 23 $ 3 Interest Rate Contracts Designated as Hedging Instruments Current $ 3 $ — $ — $ — $ — $ — $ — $ — Noncurrent 3 — — — — — — — Not Designated as Hedging Instruments Current 2 — 2 2 — — — — Total Derivative Assets – Interest Rate Contracts $ 8 $ — $ 2 $ 2 $ — $ — $ — $ — Total Derivative Assets $ 320 $ 162 $ 124 $ 124 $ — $ 2 $ 23 $ 3 Derivative Liabilities December 31, 2021 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Commodity Contracts Designated as Hedging Instruments Current $ 27 $ — $ — $ — $ — $ — $ — $ — Noncurrent 117 — — — — — — — Not Designated as Hedging Instruments Current 72 18 19 5 14 — 13 21 Noncurrent 132 9 5 5 — — — 118 Total Derivative Liabilities – Commodity Contracts $ 348 $ 27 $ 24 $ 10 $ 14 $ — $ 13 $ 139 Interest Rate Contracts Designated as Hedging Instruments Current $ 75 $ — $ — $ — $ — $ — $ — $ — Noncurrent 21 — — — — — — — Not Designated as Hedging Instruments Current 10 8 — — — 1 — — Noncurrent 18 — — — — 4 14 — Total Derivative Liabilities – Interest Rate Contracts $ 124 $ 8 $ — $ — $ — $ 5 $ 14 $ — Total Derivative Liabilities $ 472 $ 35 $ 24 $ 10 $ 14 $ 5 $ 27 $ 139 OFFSETTING ASSETS AND LIABILITIES The following tables present the line items on the Condensed Consolidated Balance Sheets where derivatives are reported. Substantially all of Duke Energy's outstanding derivative contracts are subject to enforceable master netting arrangements. The gross amounts offset in the tables below show the effect of these netting arrangements on financial position, and include cash collateral posted to offset the net position. The amounts shown are calculated by counterparty. Accounts receivable or accounts payable and letters of credit may also be available to offset exposures in the event of bankruptcy. These amounts are not included in the tables below. Derivative Assets June 30, 2022 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Current Gross amounts recognized $ 868 $ 268 $ 203 $ 203 $ — $ 5 $ 141 $ — Gross amounts offset (331) (193) (137) (137) — — — — Net amounts presented in Current Assets: Other $ 537 $ 75 $ 66 $ 66 $ — $ 5 $ 141 $ — Noncurrent Gross amounts recognized $ 468 $ 216 $ 165 $ 165 $ — $ — $ — $ — Gross amounts offset (242) (125) (117) (117) — — — — Net amounts presented in Other Noncurrent Assets: Other $ 226 $ 91 $ 48 $ 48 $ — $ — $ — $ — Derivative Liabilities June 30, 2022 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Current Gross amounts recognized $ 190 $ 32 $ 33 $ 1 $ 33 $ 1 $ 21 $ 25 Gross amounts offset (19) (1) (1) (1) — — (17) — Net amounts presented in Current Liabilities: Other $ 171 $ 31 $ 32 $ — $ 33 $ 1 $ 4 $ 25 Noncurrent Gross amounts recognized $ 403 $ 9 $ 10 $ 10 $ — $ 2 $ — $ 168 Gross amounts offset (19) (9) (10) (10) — — — — Net amounts presented in Other Noncurrent Liabilities: Other $ 384 $ — $ — $ — $ — $ 2 $ — $ 168 Derivative Assets December 31, 2021 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Current Gross amounts recognized $ 204 $ 99 $ 74 $ 74 $ — $ 2 $ 23 $ 3 Gross amounts offset (25) (16) (9) (9) — — — — Net amounts presented in Current Assets: Other $ 179 $ 83 $ 65 $ 65 $ — $ 2 $ 23 $ 3 Noncurrent Gross amounts recognized $ 116 $ 63 $ 50 $ 50 $ — $ — $ — $ — Gross amounts offset (23) (15) (8) (8) — — — — Net amounts presented in Other Noncurrent Assets: Other $ 93 $ 48 $ 42 $ 42 $ — $ — $ — $ — Derivative Liabilities December 31, 2021 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Current Gross amounts recognized $ 184 $ 26 $ 19 $ 5 $ 14 $ 1 $ 13 $ 21 Gross amounts offset (11) (6) (5) (5) — — — — Net amounts presented in Current Liabilities: Other $ 173 $ 20 $ 14 $ — $ 14 $ 1 $ 13 $ 21 Noncurrent Gross amounts recognized $ 288 $ 9 $ 5 $ 5 $ — $ 4 $ 14 $ 118 Gross amounts offset (12) (8) (5) (5) — — — — Net amounts presented in Other Noncurrent Liabilities: Other $ 276 $ 1 $ — $ — $ — $ 4 $ 14 $ 118

Investments in Debt and Equity

Investments in Debt and Equity Securities	6 Months Ended
	Jun. 30, 2022
Investments, Debt and Equity Securities [Abstract]
Investments In Debt And Equity Securities	INVESTMENTS IN DEBT AND EQUITY SECURITIES Duke Energy’s investments in debt and equity securities are primarily comprised of investments held in (i) the NDTF at Duke Energy Carolinas, Duke Energy Progress and Duke Energy Florida, (ii) the grantor trusts at Duke Energy Progress, Duke Energy Florida and Duke Energy Indiana related to OPEB plans and (iii) Bison. The Duke Energy Registrants classify investments in debt securities as Available for Sale (AFS) and investments in equity securities as fair value through net income (FV-NI). For investments in debt securities classified as AFS, the unrealized gains and losses are included in other comprehensive income until realized, at which time they are reported through net income. For investments in equity securities classified as FV-NI, both realized and unrealized gains and losses are reported through net income. Substantially all of Duke Energy’s investments in debt and equity securities qualify for regulatory accounting, and accordingly, all associated realized and unrealized gains and losses on these investments are deferred as a regulatory asset or liability. Duke Energy classifies the majority of investments in debt and equity securities as long term, unless otherwise noted. Investment Trusts The investments within the Investment Trusts are managed by independent investment managers with discretion to buy, sell and invest pursuant to the guidelines set forth by the investment manager agreements and trust agreements. The Duke Energy Registrants have limited oversight of the day-to-day management of these investments. As a result, the ability to hold investments in unrealized loss positions is outside the control of the Duke Energy Registrants. Accordingly, all unrealized losses associated with debt securities within the Investment Trusts are recognized immediately and deferred to regulatory accounts where appropriate. Other AFS Securities Unrealized gains and losses on all other AFS securities are included in other comprehensive income until realized, unless it is determined the carrying value of an investment has a credit loss. The Duke Energy Registrants analyze all investment holdings each reporting period to determine whether a decline in fair value is related to a credit loss. If a credit loss exists, the unrealized credit loss is included in earnings. There were no material credit losses as of June 30, 2022, and December 31, 2021. Other Investments amounts are recorded in Other within Other Noncurrent Assets on the Condensed Consolidated Balance Sheets. DUKE ENERGY The following table presents the estimated fair value of investments in debt and equity securities; equity investments are classified as FV-NI and debt investments are classified as AFS. June 30, 2022 December 31, 2021 Gross Gross Gross Gross Unrealized Unrealized Estimated Unrealized Unrealized Estimated Holding Holding Fair Holding Holding Fair (in millions) Gains Losses Value Gains Losses Value NDTF Cash and cash equivalents $ — $ — $ 134 $ — $ — $ 160 Equity securities 3,500 141 5,751 4,905 43 7,350 Corporate debt securities — 81 728 39 6 829 Municipal bonds — 32 334 14 1 314 U.S. government bonds 2 89 1,462 31 12 1,568 Other debt securities — 14 170 3 1 180 Total NDTF Investments $ 3,502 $ 357 $ 8,579 $ 4,992 $ 63 $ 10,401 Other Investments Cash and cash equivalents $ — $ — $ 51 $ — $ — $ 36 Equity securities 20 17 124 36 — 156 Corporate debt securities — 13 108 2 1 119 Municipal bonds — 3 82 3 1 80 U.S. government bonds — 5 49 — — 56 Other debt securities — 2 35 — 1 45 Total Other Investments $ 20 $ 40 $ 449 $ 41 $ 3 $ 492 Total Investments $ 3,522 $ 397 $ 9,028 $ 5,033 $ 66 $ 10,893 Realized gains and losses, which were determined on a specific identification basis, from sales of FV-NI and AFS securities for the three and six months ended June 30, 2022, and 2021, were as follows. Three Months Ended Six Months Ended (in millions) June 30, 2022 June 30, 2021 June 30, 2022 June 30, 2021 FV-NI: Realized gains $ 34 $ 146 $ 145 $ 286 Realized losses 101 37 186 60 AFS: Realized gains 11 16 15 34 Realized losses 42 18 65 31 DUKE ENERGY CAROLINAS The following table presents the estimated fair value of investments in debt and equity securities; equity investments are classified as FV-NI and debt investments are classified as AFS. June 30, 2022 December 31, 2021 Gross Gross Gross Gross Unrealized Unrealized Estimated Unrealized Unrealized Estimated Holding Holding Fair Holding Holding Fair (in millions) Gains Losses Value Gains Losses Value NDTF Cash and cash equivalents $ — $ — $ 58 $ — $ — $ 53 Equity securities 2,058 69 3,327 2,887 19 4,265 Corporate debt securities — 63 470 24 4 506 Municipal bonds — 9 63 2 — 48 U.S. government bonds 1 37 645 16 3 712 Other debt securities — 13 165 3 1 175 Total NDTF Investments $ 2,059 $ 191 $ 4,728 $ 2,932 $ 27 $ 5,759 Realized gains and losses, which were determined on a specific identification basis, from sales of FV-NI and AFS securities for the three and six months ended June 30, 2022, and 2021, were as follows. Three Months Ended Six Months Ended (in millions) June 30, 2022 June 30, 2021 June 30, 2022 June 30, 2021 FV-NI: Realized gains $ 18 $ 90 $ 93 $ 218 Realized losses 55 23 104 39 AFS: Realized gains 9 12 12 25 Realized losses 21 13 37 22 PROGRESS ENERGY The following table presents the estimated fair value of investments in debt and equity securities; equity investments are classified as FV-NI and debt investments are classified as AFS. June 30, 2022 December 31, 2021 Gross Gross Gross Gross Unrealized Unrealized Estimated Unrealized Unrealized Estimated Holding Holding Fair Holding Holding Fair (in millions) Gains Losses Value Gains Losses Value NDTF Cash and cash equivalents $ — $ — $ 76 $ — $ — $ 107 Equity securities 1,442 72 2,424 2,018 24 3,085 Corporate debt securities — 18 258 15 2 323 Municipal bonds — 23 271 12 1 266 U.S. government bonds 1 52 817 15 9 856 Other debt securities — 1 5 — — 5 Total NDTF Investments $ 1,443 $ 166 $ 3,851 $ 2,060 $ 36 $ 4,642 Other Investments Cash and cash equivalents $ — $ — $ 15 $ — $ — $ 20 Municipal bonds — — 25 2 — 26 Total Other Investments $ — $ — $ 40 $ 2 $ — $ 46 Total Investments $ 1,443 $ 166 $ 3,891 $ 2,062 $ 36 $ 4,688 Realized gains and losses, which were determined on a specific identification basis, from sales of FV-NI and AFS securities for the three and six months ended June 30, 2022, and 2021, were as follows. Three Months Ended Six Months Ended (in millions) June 30, 2022 June 30, 2021 June 30, 2022 June 30, 2021 FV-NI: Realized gains $ 16 $ 56 $ 52 $ 68 Realized losses 46 14 82 21 AFS: Realized gains 2 3 3 7 Realized losses 17 3 23 6 DUKE ENERGY PROGRESS The following table presents the estimated fair value of investments in debt and equity securities; equity investments are classified as FV-NI and debt investments are classified as AFS. June 30, 2022 December 31, 2021 Gross Gross Gross Gross Unrealized Unrealized Estimated Unrealized Unrealized Estimated Holding Holding Fair Holding Holding Fair (in millions) Gains Losses Value Gains Losses Value NDTF Cash and cash equivalents $ — $ — $ 46 $ — $ — $ 94 Equity securities 1,363 72 2,333 1,915 23 2,970 Corporate debt securities — 17 241 15 2 282 Municipal bonds — 23 271 12 1 266 U.S. government bonds 1 31 477 15 3 472 Other debt securities — 1 5 — — 5 Total NDTF Investments $ 1,364 $ 144 $ 3,373 $ 1,957 $ 29 $ 4,089 Other Investments Cash and cash equivalents $ — $ — $ 12 $ — $ — $ 16 Total Other Investments $ — $ — $ 12 $ — $ — $ 16 Total Investments $ 1,364 $ 144 $ 3,385 $ 1,957 $ 29 $ 4,105 Realized gains and losses, which were determined on a specific identification basis, from sales of FV-NI and AFS securities for the three and six months ended June 30, 2022, and 2021, were as follows. Three Months Ended Six Months Ended (in millions) June 30, 2022 June 30, 2021 June 30, 2022 June 30, 2021 FV-NI: Realized gains $ 15 $ 55 $ 51 $ 67 Realized losses 45 13 80 20 AFS: Realized gains 2 3 3 7 Realized losses 15 3 20 6 DUKE ENERGY FLORIDA The following table presents the estimated fair value of investments in debt and equity securities; equity investments are classified as FV-NI and debt investments are classified as AFS. June 30, 2022 December 31, 2021 Gross Gross Gross Gross Unrealized Unrealized Estimated Unrealized Unrealized Estimated Holding Holding Fair Holding Holding Fair (in millions) Gains Losses Value Gains Losses Value NDTF Cash and cash equivalents $ — $ — $ 30 $ — $ — $ 13 Equity securities 79 — 91 103 1 115 Corporate debt securities — 1 17 — — 41 U.S. government bonds — 21 340 — 6 384 Total NDTF Investments (a) $ 79 $ 22 $ 478 $ 103 $ 7 $ 553 Other Investments Cash and cash equivalents $ — $ — $ 1 $ — $ — $ 3 Municipal bonds — — 25 2 — 26 Total Other Investments $ — $ — $ 26 $ 2 $ — $ 29 Total Investments $ 79 $ 22 $ 504 $ 105 $ 7 $ 582 (a) During the six months ended June 30, 2022, and the year ended December 31, 2021, Duke Energy Florida received reimbursements from the NDTF for costs related to ongoing decommissioning activity of Crystal River Unit 3. Realized gains and losses, which were determined on a specific identification basis, from sales of FV-NI and AFS securities for the three and six months ended June 30, 2022, and 2021, were immaterial. DUKE ENERGY INDIANA The following table presents the estimated fair value of investments in debt and equity securities; equity investments are measured at FV-NI and debt investments are classified as AFS. June 30, 2022 December 31, 2021 Gross Gross Gross Gross Unrealized Unrealized Estimated Unrealized Unrealized Estimated Holding Holding Fair Holding Holding Fair (in millions) Gains Losses Value Gains Losses Value Investments Equity securities $ 2 $ 17 $ 77 $ 6 $ — $ 97 Corporate debt securities — — 8 — — 6 Municipal bonds — 3 48 1 1 46 U.S. government bonds — — 5 — — 12 Total Investments $ 2 $ 20 $ 138 $ 7 $ 1 $ 161 Realized gains and losses, which were determined on a specific identification basis, from sales of FV-NI and AFS securities for the three and six months ended June 30, 2022, and 2021, were immaterial. DEBT SECURITY MATURITIES The table below summarizes the maturity date for debt securities. June 30, 2022 Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Indiana Due in one year or less $ 137 $ 7 $ 118 $ 24 $ 94 $ 9 Due after one through five years 930 350 501 266 235 23 Due after five through 10 years 484 209 204 189 15 6 Due after 10 years 1,417 777 553 515 38 23 Total $ 2,968 $ 1,343 $ 1,376 $ 994 $ 382 $ 61

Fair Value Measurements

Fair Value Measurements	6 Months Ended
	Jun. 30, 2022
Fair Value Disclosures [Abstract]
Fair Value Measurements	FAIR VALUE MEASUREMENTS Fair value is the exchange price to sell an asset or transfer a liability in an orderly transaction between market participants at the measurement date. The fair value definition focuses on an exit price versus the acquisition cost. Fair value measurements use market data or assumptions market participants would use in pricing the asset or liability, including assumptions about risk and the risks inherent in the inputs to the valuation technique. These inputs may be readily observable, corroborated by market data or generally unobservable. Valuation techniques maximize the use of observable inputs and minimize use of unobservable inputs. A midmarket pricing convention (the midpoint price between bid and ask prices) is permitted for use as a practical expedient. Fair value measurements are classified in three levels based on the fair value hierarchy as defined by GAAP. Certain investments are not categorized within the fair value hierarchy. These investments are measured at fair value using the net asset value (NAV) per share practical expedient. The NAV is derived based on the investment cost, less any impairment, plus or minus changes resulting from observable price changes for an identical or similar investment of the same issuer. Fair value accounting guidance permits entities to elect to measure certain financial instruments that are not required to be accounted for at fair value, such as equity method investments or the company’s own debt, at fair value. The Duke Energy Registrants have not elected to record any of these items at fair value. Valuation methods of the primary fair value measurements disclosed below are as follows. Investments in equity securities The majority of investments in equity securities are valued using Level 1 measurements. Investments in equity securities are typically valued at the closing price in the principal active market as of the last business day of the quarter. Principal active markets for equity prices include published exchanges such as the New York Stock Exchange and Nasdaq Stock Market. Foreign equity prices are translated from their trading currency using the currency exchange rate in effect at the close of the principal active market. There was no after-hours market activity that was required to be reflected in the reported fair value measurements. Investments in debt securities Most investments in debt securities are valued using Level 2 measurements because the valuations use interest rate curves and credit spreads applied to the terms of the debt instrument (maturity and coupon interest rate) and consider the counterparty credit rating. If the market for a particular fixed-income security is relatively inactive or illiquid, the measurement is Level 3. Commodity derivatives Commodity derivatives with clearinghouses are classified as Level 1. Commodity derivatives with observable forward curves are classified as Level 2. If forward price curves are not observable for the full term of the contract and the unobservable period had more than an insignificant impact on the valuation, the commodity derivative is classified as Level 3. In isolation, increases (decreases) in natural gas forward prices result in favorable (unfavorable) fair value adjustments for natural gas purchase contracts; and increases (decreases) in electricity forward prices result in unfavorable (favorable) fair value adjustments for electricity sales contracts. Duke Energy regularly evaluates and validates pricing inputs used to estimate the fair value of natural gas commodity contracts by a market participant price verification procedure. This procedure provides a comparison of internal forward commodity curves to market participant generated curves. Interest rate derivatives Most over-the-counter interest rate contract derivatives are valued using financial models that utilize observable inputs for similar instruments and are classified as Level 2. Inputs include forward interest rate curves, notional amounts, interest rates and credit quality of the counterparties. Foreign currency derivatives Most over-the-counter foreign currency derivatives are valued using financial models that utilize observable inputs for similar instruments and are classified as Level 2. Inputs include forward foreign currency rate curves, notional amounts, rates and credit quality of the counterparties. Other fair value considerations See Note 11 in Duke Energy's Annual Report on Form 10-K for the year ended December 31, 2021, for a discussion of the valuation of goodwill and intangible assets. DUKE ENERGY The following tables provide recorded balances for assets and liabilities measured at fair value on a recurring basis on the Condensed Consolidated Balance Sheets. Derivative amounts in the tables below for all Duke Energy Registrants exclude cash collateral, which is disclosed in Note 8. See Note 9 for additional information related to investments by major security type for the Duke Energy Registrants. June 30, 2022 (in millions) Total Fair Value Level 1 Level 2 Level 3 Not Categorized NDTF cash and cash equivalents $ 134 $ 134 $ — $ — $ — NDTF equity securities 5,751 5,704 — — 47 NDTF debt securities 2,694 849 1,845 — — Other equity securities 124 124 — — — Other debt securities 274 44 230 — — Other cash and cash equivalents 51 51 — — — Derivative assets 1,336 2 1,245 89 — Total assets 10,364 6,908 3,320 89 47 Derivative liabilities (593) (21) (327) (245) — Net assets (liabilities) $ 9,771 $ 6,887 $ 2,993 $ (156) $ 47 December 31, 2021 (in millions) Total Fair Value Level 1 Level 2 Level 3 Not Categorized NDTF cash and cash equivalents $ 160 $ 160 $ — $ — $ — NDTF equity securities 7,350 7,300 — — 50 NDTF debt securities 2,891 967 1,924 — — Other equity securities 156 156 — — — Other debt securities 300 45 255 — — Other cash and cash equivalents 36 36 — — — Derivative assets 320 3 293 24 — Total assets 11,213 8,667 2,472 24 50 Derivative liabilities (472) (13) (314) (145) — Net assets (liabilities) $ 10,741 $ 8,654 $ 2,158 $ (121) $ 50 The following tables provide reconciliations of beginning and ending balances of assets and liabilities measured at fair value using Level 3 measurements. Derivatives (net) Three Months Ended June 30, Six Months Ended June 30, (in millions) 2022 2021 2022 2021 Balance at beginning of period $ (199) $ (126) $ (121) $ (77) Total pretax realized or unrealized losses included in comprehensive income (42) (31) (110) (75) Purchases, sales, issuances and settlements: Purchases 77 21 77 21 Settlements 21 (1) 18 (8) Total (losses) gains included on the Condensed Consolidated Balance Sheet (13) 6 (20) 8 Balance at end of period $ (156) $ (131) $ (156) $ (131) DUKE ENERGY CAROLINAS The following tables provide recorded balances for assets and liabilities measured at fair value on a recurring basis on the Condensed Consolidated Balance Sheets. June 30, 2022 (in millions) Total Fair Value Level 1 Level 2 Not Categorized NDTF cash and cash equivalents $ 58 $ 58 $ — $ — NDTF equity securities 3,327 3,280 — 47 NDTF debt securities 1,343 304 1,039 — Derivative assets 484 — 484 — Total assets 5,212 3,642 1,523 47 Derivative liabilities (41) — (41) — Net assets $ 5,171 $ 3,642 $ 1,482 $ 47 December 31, 2021 (in millions) Total Fair Value Level 1 Level 2 Not Categorized NDTF cash and cash equivalents $ 53 $ 53 $ — $ — NDTF equity securities 4,265 4,215 — 50 NDTF debt securities 1,441 339 1,102 — Derivative assets 162 — 162 — Total assets 5,921 4,607 1,264 50 Derivative liabilities (35) — (35) — Net assets $ 5,886 $ 4,607 $ 1,229 $ 50 PROGRESS ENERGY The following tables provide recorded balances for assets and liabilities measured at fair value on a recurring basis on the Condensed Consolidated Balance Sheets. June 30, 2022 December 31, 2021 (in millions) Total Fair Value Level 1 Level 2 Total Fair Value Level 1 Level 2 NDTF cash and cash equivalents $ 76 $ 76 $ — $ 107 $ 107 $ — NDTF equity securities 2,424 2,424 — 3,085 3,085 — NDTF debt securities 1,351 545 806 1,450 628 822 Other debt securities 25 — 25 26 — 26 Other cash and cash equivalents 15 15 — 20 20 — Derivative assets 368 — 368 124 — 124 Total assets 4,259 3,060 1,199 4,812 3,840 972 Derivative liabilities (43) — (43) (24) — (24) Net assets $ 4,216 $ 3,060 $ 1,156 $ 4,788 $ 3,840 $ 948 DUKE ENERGY PROGRESS The following tables provide recorded balances for assets and liabilities measured at fair value on a recurring basis on the Condensed Consolidated Balance Sheets. June 30, 2022 December 31, 2021 (in millions) Total Fair Value Level 1 Level 2 Total Fair Value Level 1 Level 2 NDTF cash and cash equivalents $ 46 $ 46 $ — $ 94 $ 94 $ — NDTF equity securities 2,333 2,333 — 2,970 2,970 — NDTF debt securities 994 253 741 1,025 289 736 Other cash and cash equivalents 12 12 — 16 16 — Derivative assets 368 — 368 124 — 124 Total assets 3,753 2,644 1,109 4,229 3,369 860 Derivative liabilities (11) — (11) (10) — (10) Net assets $ 3,742 $ 2,644 $ 1,098 $ 4,219 $ 3,369 $ 850 DUKE ENERGY FLORIDA The following tables provide recorded balances for assets and liabilities measured at fair value on a recurring basis on the Condensed Consolidated Balance Sheets. June 30, 2022 December 31, 2021 (in millions) Total Fair Value Level 1 Level 2 Total Fair Value Level 1 Level 2 NDTF cash and cash equivalents $ 30 $ 30 $ — $ 13 $ 13 $ — NDTF equity securities 91 91 — 115 115 — NDTF debt securities 357 292 65 425 339 86 Other debt securities 25 — 25 26 — 26 Other cash and cash equivalents 1 1 — 3 3 — Total assets 504 414 90 582 470 112 Derivative liabilities (33) — (33) (14) — (14) Net assets $ 471 $ 414 $ 57 $ 568 $ 470 $ 98 DUKE ENERGY OHIO The recorded balances for assets and liabilities measured at fair value on a recurring basis on the Condensed Consolidated Balance Sheets were not material at June 30, 2022, and December 31, 2021. DUKE ENERGY INDIANA The following tables provide recorded balances for assets and liabilities measured at fair value on a recurring basis on the Condensed Consolidated Balance Sheets. June 30, 2022 December 31, 2021 (in millions) Total Fair Value Level 1 Level 2 Level 3 Total Fair Value Level 1 Level 2 Level 3 Other equity securities $ 77 $ 77 $ — $ — $ 97 $ 97 $ — $ — Other debt securities 61 — 61 — 64 — 64 — Derivative assets 141 2 55 84 23 1 — 22 Total assets 279 79 116 84 184 98 64 22 Derivative liabilities (21) (21) — — (27) (13) (14) — Net assets $ 258 $ 58 $ 116 $ 84 $ 157 $ 85 $ 50 $ 22 The following table provides a reconciliation of beginning and ending balances of assets and liabilities measured at fair value using Level 3 measurements. Derivatives (net) Three Months Ended June 30, Six Months Ended June 30, (in millions) 2022 2021 2022 2021 Balance at beginning of period $ 10 $ 2 $ 22 $ 6 Purchases, sales, issuances and settlements: Purchases 74 18 74 18 Settlements 16 (3) 10 (9) Total (losses) gains included on the Condensed Consolidated Balance Sheet (16) 5 (22) 7 Balance at end of period $ 84 $ 22 $ 84 $ 22 PIEDMONT The following tables provide recorded balances for assets and liabilities measured at fair value on a recurring basis on the Condensed Consolidated Balance Sheets. June 30, 2022 December 31, 2021 (in millions) Total Fair Value Level 1 Level 2 Total Fair Value Level 1 Level 2 Derivative assets $ — $ — $ — $ 3 $ 3 $ — Derivative liabilities (193) — (193) (139) — (139) Net (liabilities) assets $ (193) $ — $ (193) $ (136) $ 3 $ (139) QUANTITATIVE INFORMATION ABOUT UNOBSERVABLE INPUTS The following tables include quantitative information about the Duke Energy Registrants' derivatives classified as Level 3. June 30, 2022 Weighted Fair Value Average Investment Type (in millions) Valuation Technique Unobservable Input Range Range Duke Energy Electricity contracts $ (245) RTO forward pricing Forward electricity curves – price per MWh $ 23.35 - $ 243.21 $ 53.28 Duke Energy Ohio FTRs 5 RTO auction pricing FTR price – per MWh (0.29) - 2.30 0.89 Duke Energy Indiana FTRs 84 RTO auction pricing FTR price – per MWh (0.61) - 24.34 3.69 Duke Energy Total Level 3 derivatives $ (156) December 31, 2021 Weighted Fair Value Average Investment Type (in millions) Valuation Technique Unobservable Input Range Range Duke Energy Electricity contracts $ (145) RTO forward pricing Forward electricity curves – price per MWh $ 19.04 - $139.11 $37.57 Duke Energy Ohio FTRs 2 RTO auction pricing FTR price – per MWh 0.06 - 1.79 0.96 Duke Energy Indiana FTRs 22 RTO auction pricing FTR price – per MWh (1.18) - 13.11 2.68 Duke Energy Total Level 3 derivatives $ (121) OTHER FAIR VALUE DISCLOSURES The fair value and book value of long-term debt, including current maturities, is summarized in the following table. Estimates determined are not necessarily indicative of amounts that could have been settled in current markets. Fair value of long-term debt uses Level 2 measurements. June 30, 2022 December 31, 2021 (in millions) Book Value Fair Value Book Value Fair Value Duke Energy (a) $ 66,318 $ 61,451 $ 63,835 $ 69,683 Duke Energy Carolinas 14,162 13,501 13,275 15,101 Progress Energy 20,751 19,830 20,823 23,751 Duke Energy Progress 10,662 9,829 10,249 11,252 Duke Energy Florida 8,447 8,150 8,482 9,772 Duke Energy Ohio 3,243 3,071 3,193 3,570 Duke Energy Indiana 4,337 4,168 4,323 5,067 Piedmont 3,363 3,086 2,968 3,278 (a) Book value of long-term debt inc ludes $1.21 billion and $1.25 billion at June 30, 2022, and December 31, 2021, respectively, of net unamortized debt discount and premium of purchase accounting adjustments related to the mergers with Progress Energy and Piedmont that are excluded from fair value of long-term debt. At both June 30, 2022, and December 31, 2021, fair value of cash and cash equivalents, accounts and notes receivable, accounts payable, notes payable and commercial paper and nonrecourse notes payable of VIEs are not materially different from their carrying amounts because of the short-term nature of these instruments and/or because the stated rates approximate market rates.

Variable Interest Entities

Variable Interest Entities	6 Months Ended
	Jun. 30, 2022
Variable Interest Entities [Abstract]
Variable Interest Entities	VARIABLE INTEREST ENTITIES CONSOLIDATED VIEs The obligations of the consolidated VIEs discussed in the following paragraphs are nonrecourse to the Duke Energy Registrants. The registrants have no requirement to provide liquidity to, purchase assets of or guarantee performance of these VIEs unless noted in the following paragraphs. No financial support was provided to any of the consolidated VIEs during the six months ended June 30, 2022, and the year ended December 31, 2021, or is expected to be provided in the future that was not previously contractually required. Receivables Financing – DERF/DEPR/DEFR DERF, DEPR and DEFR are bankruptcy remote, special purpose subsidiaries of Duke Energy Carolinas, Duke Energy Progress and Duke Energy Florida, respectively. DERF, DEPR and DEFR are wholly owned LLCs with separate legal existence from their parent companies, and their assets are not generally available to creditors of their parent companies. On a revolving basis, DERF, DEPR and DEFR buy certain accounts receivable arising from the sale of electricity and related services from their parent companies. DERF, DEPR and DEFR borrow amounts under credit facilities to buy these receivables. Borrowing availability from the credit facilities is limited to the amount of qualified receivables purchased, which generally exclude receivables past due more than a predetermined number of days and reserves for expected past-due balances. The sole source of funds to satisfy the related debt obligations is cash collections from the receivables. Amounts borrowed under the credit facilities are reflected on the Condensed Consolidated Balance Sheets as Long-Term Debt. The most significant activity that impacts the economic performance of DERF, DEPR and DEFR are the decisions made to manage delinquent receivables. Duke Energy Carolinas, Duke Energy Progress and Duke Energy Florida are considered the primary beneficiaries and consolidate DERF, DEPR and DEFR, respectively, as they make those decisions. Receivables Financing – CRC CRC is a bankruptcy remote, special purpose entity indirectly owned by Duke Energy. On a revolving basis, CRC buys certain accounts receivable arising from the sale of electricity, natural gas and related services from Duke Energy Ohio and Duke Energy Indiana. CRC borrows amounts under a credit facility to buy the receivables from Duke Energy Ohio and Duke Energy Indiana. Borrowing availability from the credit facility is limited to the amount of qualified receivables sold to CRC, which generally exclude receivables past due more than a predetermined number of days and reserves for expected past-due balances. The sole source of funds to satisfy the related debt obligation is cash collections from the receivables. Amounts borrowed under the credit facility are reflected on Duke Energy's Condensed Consolidated Balance Sheets as Long-Term Debt. The proceeds Duke Energy Ohio and Duke Energy Indiana receive from the sale of receivables to CRC are approximately 75% cash and 25% in the form of a subordinated note from CRC. The subordinated note is a retained interest in the receivables sold. Depending on collection experience, additional equity infusions to CRC may be required by Duke Energy to maintain a minimum equity balance of $3 million. CRC is considered a VIE because (i) equity capitalization is insufficient to support its operations, (ii) power to direct the activities that most significantly impact the economic performance of the entity is not held by the equity holder and (iii) deficiencies in net worth of CRC are funded by Duke Energy. The most significant activities that impact the economic performance of CRC are decisions made to manage delinquent receivables. Duke Energy is considered the primary beneficiary and consolidates CRC as it makes these decisions. Neither Duke Energy Ohio nor Duke Energy Indiana consolidate CRC. Receivables Financing – Credit Facilities The following table summarizes the amounts and expiration dates of the credit facilities and associated restricted receivables described above. Duke Energy Duke Energy Duke Energy Duke Energy Carolinas Progress Florida (in millions) CRC DERF DEPR DEFR Expiration date February 2025 January 2025 April 2025 April 2023 Credit facility amount $ 350 $ 500 $ 400 $ 250 Amounts borrowed at June 30, 2022 350 498 400 250 Amounts borrowed at December 31, 2021 350 475 350 250 Restricted Receivables at June 30, 2022 776 893 705 640 Restricted Receivables at December 31, 2021 587 844 574 427 Nuclear Asset-Recovery Bonds – DEFPF DEFPF is a bankruptcy remote, wholly owned special purpose subsidiary of Duke Energy Florida. DEFPF was formed in 2016 for the sole purpose of issuing nuclear asset-recovery bonds to finance Duke Energy Florida's unrecovered regulatory asset related to Crystal River Unit 3. In 2016, DEFPF issued senior secured bonds and used the proceeds to acquire nuclear asset-recovery property from Duke Energy Florida. The nuclear asset-recovery property acquired includes the right to impose, bill, collect and adjust a non-bypassable nuclear asset-recovery charge from all Duke Energy Florida retail customers until the bonds are paid in full and all financing costs have been recovered. The nuclear asset-recovery bonds are secured by the nuclear asset-recovery property and cash collections from the nuclear asset-recovery charges are the sole source of funds to satisfy the debt obligation. The bondholders have no recourse to Duke Energy Florida. DEFPF is considered a VIE primarily because the equity capitalization is insufficient to support its operations. Duke Energy Florida has the power to direct the significant activities of the VIE as described above and therefore Duke Energy Florida is considered the primary beneficiary and consolidates DEFPF. The following table summarizes the impact of DEFPF on Duke Energy Florida's Condensed Consolidated Balance Sheets. (in millions) June 30, 2022 December 31, 2021 Receivables of VIEs $ 7 $ 5 Regulatory Assets: Current 54 54 Current Assets: Other 33 39 Other Noncurrent Assets: Regulatory assets 859 883 Current Liabilities: Other 9 9 Current maturities of long-term debt 56 56 Long-Term Debt 916 946 Storm Recovery Bonds – Duke Energy Carolinas NC Storm Funding and Duke Energy Progress NC Storm Funding Duke Energy Carolinas NC Storm Funding, LLC (DECNCSF) and Duke Energy Progress NC Storm Funding, LLC (DEPNCSF) are bankruptcy remote, wholly owned special purpose subsidiaries of Duke Energy Carolinas and Duke Energy Progress, respectively. These entities were formed in 2021 for the sole purpose of issuing storm recovery bonds to finance certain of Duke Energy Carolinas’ and Duke Energy Progress’ unrecovered regulatory assets related to storm costs. In November 2021, DECNCSF and DEPNCSF issued $237 million and $770 million of senior secured bonds, respectively and used the proceeds to acquire storm recovery property from Duke Energy Carolinas and Duke Energy Progress. The storm recovery property was created by state legislation and NCUC financing orders for the purpose of financing storm costs incurred in 2018 and 2019. The storm recovery property acquired includes the right to impose, bill, collect and adjust a non-bypassable charge from all Duke Energy Carolinas’ and Duke Energy Progress’ retail customers until the bonds are paid in full and all financing costs have been recovered. The storm recovery bonds are secured by the storm recovery property and cash collections from the storm recovery charges are the sole source of funds to satisfy the debt obligation. The bondholders have no recourse to Duke Energy Carolinas or Duke Energy Progress. DECNCSF and DEPNCSF are considered VIEs primarily because the equity capitalization is insufficient to support their operations. Duke Energy Carolinas and Duke Energy Progress have the power to direct the significant activities of the VIEs as described above and therefore Duke Energy Carolinas and Duke Energy Progress are considered the primary beneficiaries and consolidate DECNCSF and DEPNCSF, respectively. The following table summarizes the impact of these VIEs on Duke Energy Carolinas’ and Duke Energy Progress’ Consolidated Balance Sheets. June 30, 2022 December 31, 2021 Duke Energy Duke Energy Duke Energy Duke Energy (in millions) Carolinas Progress Carolinas Progress Regulatory Assets: Current $ 12 $ 39 $ 12 $ 39 Current Assets: Other 8 26 — — Other Noncurrent Assets: Regulatory assets 214 701 220 720 Other Noncurrent Assets: Other 1 4 1 4 Current Liabilities: Other 3 10 1 2 Current maturities of long-term debt 10 32 5 15 Long-Term Debt 224 731 228 747 Commercial Renewables Certain of Duke Energy’s renewable energy facilities are VIEs due to Duke Energy issuing guarantees for debt service and operations and maintenance reserves in support of debt financings. Assets are restricted and cannot be pledged as collateral or sold to third parties without prior approval of debt holders. Additionally, Duke Energy has VIEs associated with tax equity arrangements entered into with third-party investors in order to finance the cost of renewable assets eligible for tax credits. The activities that most significantly impacted the economic performance of these renewable energy facilities were decisions associated with siting, negotiating PPAs and Engineering, Procurement and Construction agreements, and decisions associated with ongoing operations and maintenance-related activities. Duke Energy is considered the primary beneficiary and consolidates the entities as it is responsible for all of these decisions. The table below presents material balances reported on Duke Energy's Condensed Consolidated Balance Sheets related to Commercial Renewables VIEs. (in millions) June 30, 2022 December 31, 2021 Current Assets: Other $ 215 $ 215 Property, Plant and Equipment: Cost 7,552 7,339 Accumulated depreciation and amortization (1,646) (1,474) Other Noncurrent Assets: Other 75 62 Current maturities of long-term debt 285 167 Long-Term Debt 1,255 1,475 Other Noncurrent Liabilities: AROs 176 173 Other Noncurrent Liabilities: Other 213 319 NON-CONSOLIDATED VIEs The following tables summarize the impact of non-consolidated VIEs on the Condensed Consolidated Balance Sheets. June 30, 2022 Duke Energy Duke Duke Pipeline Commercial Energy Energy (in millions) Investments Renewables Total Ohio Indiana Receivables from affiliated companies $ — $ — $ — $ 131 $ 222 Investments in equity method unconsolidated affiliates 29 507 536 — — Deferred tax asset 62 — 62 — — Total assets $ 91 $ 507 $ 598 $ 131 $ 222 Other current liabilities 53 4 57 — — Other noncurrent liabilities 51 3 54 — — Total liabilities $ 104 $ 7 $ 111 $ — $ — Net (liabilities) assets $ (13) $ 500 $ 487 $ 131 $ 222 December 31, 2021 Duke Energy Duke Duke Pipeline Commercial Energy Energy (in millions) Investments Renewables Total Ohio Indiana Receivables from affiliated companies $ — $ — $ — $ 79 $ 97 Investments in equity method unconsolidated affiliates 15 508 523 — — Other noncurrent assets 61 — 61 — — Total assets $ 76 $ 508 $ 584 $ 79 $ 97 Other current liabilities 47 4 51 — — Other noncurrent liabilities 54 3 57 — — Total liabilities $ 101 $ 7 $ 108 $ — $ — Net (liabilities) assets $ (25) $ 501 $ 476 $ 79 $ 97 The Duke Energy Registrants are not aware of any situations where the maximum exposure to loss significantly exceeds the carrying values shown above except for certain renewable energy project entities guarantees for debt services and operations and maintenance, as discussed below. Natural Gas Investments Duke Energy has investments in various joint ventures to construct and operate pipeline and renewable natural gas projects. These entities are considered VIEs due to having insufficient equity to finance their own activities without subordinated financial support. Duke Energy does not have the power to direct the activities that most significantly impact the economic performance, the obligation to absorb losses or the right to receive benefits of these VIEs and therefore does not consolidate these entities. Commercial Renewables Duke Energy has investments in various renewable energy project entities. Duke Energy has a 50% ownership in a VIE, which owns a portfolio of wind projects. This entity is a VIE as a result of Duke Energy issuing guarantees for debt service and operations and maintenance reserves in support of debt financings. Duke Energy does not consolidate this VIE because power to direct and control key activities is shared jointly by Duke Energy and the other owner. Duke Energy also has equity ownership in an entity, which owns a portfolio of fuel cell projects. Duke Energy does not consolidate the fuel cell portfolio as it does not have the power to direct the activities that most significantly impact the economic performance of the entity. OVEC Duke Energy Ohio’s 9% ownership interest in OVEC is considered a non-consolidated VIE due to OVEC having insufficient equity to finance its activities without subordinated financial support. The activities that most significantly impact OVEC's economic performance include fuel strategy and supply activities and decisions associated with ongoing operations and maintenance-related activities. Duke Energy Ohio does not have the unilateral power to direct these activities, and therefore, does not consolidate OVEC. As a counterparty to an Inter-Company Power Agreement (ICPA), Duke Energy Ohio has a contractual arrangement to receive entitlements to capacity and energy from OVEC’s power plants through June 2040 commensurate with its power participation ratio, which is equivalent to Duke Energy Ohio's ownership interest. Costs, including fuel, operating expenses, fixed costs, debt amortization and interest expense, are allocated to counterparties to the ICPA based on their power participation ratio. The value of the ICPA is subject to variability due to fluctuation in power prices and changes in OVEC's cost of business. CRC See discussion under Consolidated VIEs for additional information related to CRC. Amounts included in Receivables from affiliated companies in the above table for Duke Energy Ohio and Duke Energy Indiana reflect their retained interest in receivables sold to CRC. These subordinated notes held by Duke Energy Ohio and Duke Energy Indiana are stated at fair value. The following table shows the gross and net receivables sold. Duke Energy Ohio Duke Energy Indiana (in millions) June 30, 2022 December 31, 2021 June 30, 2022 December 31, 2021 Receivables sold $ 313 $ 269 $ 466 $ 328 Less: Retained interests 131 79 222 97 Net receivables sold $ 182 $ 190 $ 244 $ 231 The following table shows sales and cash flows related to receivables sold. Duke Energy Ohio Duke Energy Indiana Six Months Ended Six Months Ended June 30, June 30, (in millions) 2022 2021 2022 2021 Sales Receivables sold $ 1,247 $ 1,004 $ 1,617 $ 1,382 Loss recognized on sale 7 5 8 6 Cash flows Cash proceeds from receivables sold $ 1,188 $ 1,029 $ 1,484 $ 1,401 Collection fees received 1 — 1 — Return received on retained interests 3 2 4 3 Cash flows from sales of receivables are reflected within Cash Flows From Operating Activities and Cash Flows from Investing Activities on Duke Energy Ohio’s and Duke Energy Indiana’s Condensed Consolidated Statements of Cash Flows.

Revenue

Revenue	6 Months Ended
	Jun. 30, 2022
Revenue from Contract with Customer [Abstract]
Revenue	REVENUE Duke Energy earns substantially all of its revenues through its reportable segments, Electric Utilities and Infrastructure, Gas Utilities and Infrastructure and Commercial Renewables. Electric Utilities and Infrastructure Electric Utilities and Infrastructure earns the majority of its revenues through retail and wholesale electric service through the generation, transmission, distribution and sale of electricity. Duke Energy generally provides retail and wholesale electric service customers with their full electric load requirements or with supplemental load requirements when the customer has other sources of electricity. The majority of wholesale revenues are full requirements contracts where the customers purchase the substantial majority of their energy needs and do not have a fixed quantity of contractually required energy or capacity. As such, related forecasted revenues are considered optional purchases. Supplemental requirements contracts that include contracted blocks of energy and capacity at contractually fixed prices have the following estimated remaining performance obligations: Remaining Performance Obligations (in millions) 2022 2023 2024 2025 2026 Thereafter Total Progress Energy $ 54 $ 53 $ 45 $ 7 $ 7 $ 43 $ 209 Duke Energy Progress 4 8 8 — — — 20 Duke Energy Florida 50 45 37 7 7 43 189 Duke Energy Indiana 2 11 16 17 15 12 73 Revenues for block sales are recognized monthly as energy is delivered and stand-ready service is provided, consistent with invoiced amounts and unbilled estimates. Gas Utilities and Infrastructure Gas Utilities and Infrastructure earns its revenue through retail and wholesale natural gas service through the transportation, distribution and sale of natural gas. Duke Energy generally provides retail and wholesale natural gas service customers with all natural gas load requirements. Additionally, while natural gas can be stored, substantially all natural gas provided by Duke Energy is consumed by customers simultaneously with receipt of delivery. Fixed-capacity payments under long-term contracts for the Gas Utilities and Infrastructure segment include minimum margin contracts and supply arrangements with municipalities and power generation facilities. Revenues for related sales are recognized monthly as natural gas is delivered and stand-ready service is provided, consistent with invoiced amounts and unbilled estimates. Estimated remaining performance obligations are as follows: Remaining Performance Obligations (in millions) 2022 2023 2024 2025 2026 Thereafter Total Piedmont $ 32 $ 64 $ 61 $ 60 $ 50 $ 286 $ 553 Commercial Renewables Commercial Renewables earns the majority of its revenues through long-term PPAs and generally sells all of its wind and solar facility output, electricity and Renewable Energy Certificates (RECs) to customers. Some of these PPAs have been accounted for as leases. For PPAs that are not accounted for as leases, the delivery of electricity and the delivery of RECs are considered separate performance obligations. Other The remainder of Duke Energy’s operations is presented as Other, which does not include material revenues from contracts with customers. Disaggregated Revenues Disaggregated revenues are presented as follows: Three Months Ended June 30, 2022 Duke Duke Duke Duke Duke (in millions) Duke Energy Progress Energy Energy Energy Energy By market or type of customer Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Electric Utilities and Infrastructure Residential $ 2,625 $ 736 $ 1,400 $ 530 $ 870 $ 196 $ 296 $ — General 1,817 566 889 370 519 111 251 — Industrial 824 296 274 184 90 33 220 — Wholesale 629 103 389 281 108 35 102 — Other revenues 202 92 247 210 37 20 23 — Total Electric Utilities and Infrastructure revenue from contracts with customers $ 6,097 $ 1,793 $ 3,199 $ 1,575 $ 1,624 $ 395 $ 892 $ — Gas Utilities and Infrastructure Residential $ 197 $ — $ — $ — $ — $ 94 $ — $ 103 Commercial 127 — — — — 38 — 90 Industrial 34 — — — — 6 — 28 Power Generation — — — — — — — 23 Other revenues 66 — — — — 6 — 44 Total Gas Utilities and Infrastructure revenue from contracts with customers $ 424 $ — $ — $ — $ — $ 144 $ — $ 288 Commercial Renewables Revenue from contracts with customers $ 77 $ — $ — $ — $ — $ — $ — $ — Other Revenue from contracts with customers $ 8 $ — $ — $ — $ — $ — $ — $ — Total revenue from contracts with customers $ 6,606 $ 1,793 $ 3,199 $ 1,575 $ 1,624 $ 539 $ 892 $ 288 Other revenue sources (a) $ 79 $ (12) $ 15 $ 6 $ 4 $ 6 $ 26 $ 22 Total revenues $ 6,685 $ 1,781 $ 3,214 $ 1,581 $ 1,628 $ 545 $ 918 $ 310 (a) Other revenue sources include revenues from leases, derivatives and alternative revenue programs that are not considered revenues from contracts with customers. Alternative revenue programs in certain jurisdictions include regulatory mechanisms that periodically adjust for over or under collection of related revenues. Three Months Ended June 30, 2021 Duke Duke Duke Duke Duke (in millions) Duke Energy Progress Energy Energy Energy Energy By market or type of customer Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Electric Utilities and Infrastructure Residential $ 2,336 $ 683 $ 1,216 $ 478 $ 738 $ 171 $ 265 $ — General 1,513 498 720 330 390 106 190 — Industrial 705 256 229 160 69 33 189 — Wholesale 521 116 331 285 46 13 63 — Other revenues 234 62 151 71 80 22 23 — Total Electric Utilities and Infrastructure revenue from contracts with customers $ 5,309 $ 1,615 $ 2,647 $ 1,324 $ 1,323 $ 345 $ 730 $ — Gas Utilities and Infrastructure Residential $ 158 $ — $ — $ — $ — $ 69 $ — $ 88 Commercial 91 — — — — 27 — 59 Industrial 30 — — — — 4 — 27 Power Generation — — — — — — — 24 Other revenues 20 — — — — 12 — (1) Total Gas Utilities and Infrastructure revenue from contracts with customers $ 299 $ — $ — $ — $ — $ 112 $ — $ 197 Commercial Renewables Revenue from contracts with customers $ 53 $ — $ — $ — $ — $ — $ — $ — Other Revenue from contracts with customers $ 6 $ — $ — $ — $ — $ — $ — $ — Total revenue from contracts with customers $ 5,667 $ 1,615 $ 2,647 $ 1,324 $ 1,323 $ 457 $ 730 $ 197 Other revenue sources (a) $ 91 $ (5) $ 32 $ 25 $ 2 $ (1) $ 5 $ 18 Total revenues $ 5,758 $ 1,610 $ 2,679 $ 1,349 $ 1,325 $ 456 $ 735 $ 215 (a) Other revenue sources include revenues from leases, derivatives and alternative revenue programs that are not considered revenues from contracts with customers. Alternative revenue programs in certain jurisdictions include regulatory mechanisms that periodically adjust for over or under collection of related revenues. Six Months Ended June 30, 2022 Duke Duke Duke Duke Duke (in millions) Duke Energy Progress Energy Energy Energy Energy By market or type of customer Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Electric Utilities and Infrastructure Residential $ 5,392 $ 1,567 $ 2,768 $ 1,154 $ 1,614 $ 407 $ 650 $ — General 3,421 1,110 1,615 695 920 227 469 — Industrial 1,596 572 544 378 166 68 412 — Wholesale 1,255 216 800 630 170 58 181 — Other revenues 404 203 458 349 109 41 (13) — Total Electric Utilities and Infrastructure revenue from contracts with customers $ 12,068 $ 3,668 $ 6,185 $ 3,206 $ 2,979 $ 801 $ 1,699 $ — Gas Utilities and Infrastructure Residential $ 769 $ — $ — $ — $ — $ 243 $ — $ 526 Commercial 396 — — — — 102 — 294 Industrial 91 — — — — 13 — 78 Power Generation — — — — — — — 47 Other revenues 181 — — — — 12 — 137 Total Gas Utilities and Infrastructure revenue from contracts with customers $ 1,437 $ — $ — $ — $ — $ 370 $ — $ 1,082 Commercial Renewables Revenue from contracts with customers $ 128 $ — $ — $ — $ — $ — $ — $ — Other Revenue from contracts with customers $ 15 $ — $ — $ — $ — $ — $ — $ — Total Revenue from contracts with customers $ 13,648 $ 3,668 $ 6,185 $ 3,206 $ 2,979 $ 1,171 $ 1,699 $ 1,082 Other revenue sources (a) $ 169 $ 1 $ 21 $ 7 $ 4 $ 12 $ 41 $ 33 Total revenues $ 13,817 $ 3,669 $ 6,206 $ 3,213 $ 2,983 $ 1,183 $ 1,740 $ 1,115 (a) Other revenue sources include revenues from leases, derivatives and alternative revenue programs that are not considered revenues from contracts with customers. Alternative revenue programs in certain jurisdictions include regulatory mechanisms that periodically adjust for over or under collection of related revenues. Six Months Ended June 30, 2021 Duke Duke Duke Duke Duke (in millions) Duke Energy Progress Energy Energy Energy Energy By market or type of customer Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Electric Utilities and Infrastructure Residential $ 4,798 $ 1,476 $ 2,378 $ 1,038 $ 1,340 $ 366 $ 578 $ — General 2,932 1,000 1,344 636 708 210 379 — Industrial 1,367 512 436 305 131 64 356 — Wholesale 1,025 230 657 577 80 26 113 — Other revenues 460 136 311 154 157 44 41 — Total Electric Utilities and Infrastructure revenue from contracts with customers $ 10,582 $ 3,354 $ 5,126 $ 2,710 $ 2,416 $ 710 $ 1,467 $ — Gas Utilities and Infrastructure Residential $ 618 $ — $ — $ — $ — $ 179 $ — $ 439 Commercial 295 — — — — 75 — 215 Industrial 80 — — — — 11 — 70 Power Generation — — — — — — — 46 Other revenues 67 — — — — 17 — 25 Total Gas Utilities and Infrastructure revenue from contracts with customers $ 1,060 $ — $ — $ — $ — $ 282 $ — $ 795 Commercial Renewables Revenue from contracts with customers $ 107 $ — $ — $ — $ — $ — $ — $ — Other Revenue from contracts with customers $ 12 $ — $ — $ — $ — $ — $ — $ — Total Revenue from contracts with customers $ 11,761 $ 3,354 $ 5,126 $ 2,710 $ 2,416 $ 992 $ 1,467 $ 795 Other revenue sources (a) $ 147 $ (28) $ 58 $ 40 $ 10 $ (4) $ 13 $ 26 Total revenues $ 11,908 $ 3,326 $ 5,184 $ 2,750 $ 2,426 $ 988 $ 1,480 $ 821 (a) Other revenue sources include revenues from leases, derivatives and alternative revenue programs that are not considered revenues from contracts with customers. Alternative revenue programs in certain jurisdictions include regulatory mechanisms that periodically adjust for over or under collection of related revenues. Duke Energy adopted the new guidance for credit losses effective January 1, 2020, using the modified retrospective method of adoption, which does not require restatement of prior year reported results. The following table presents the reserve for credit losses for trade and other receivables based on adoption of the new standard. Three Months Ended June 30, 2021 and 2022 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Balance at March 31, 2021 $ 147 $ 34 $ 37 $ 23 $ 15 $ 4 $ 3 $ 14 Write-Offs (5) 1 (4) (3) (1) — — (2) Credit Loss Expense 12 6 6 4 2 — — 1 Other Adjustments (31) 1 (3) (3) — — — — Balance at June 30, 2021 $ 123 $ 42 $ 36 $ 21 $ 16 $ 4 $ 3 $ 13 Balance at March 31, 2022 $ 140 $ 52 $ 51 $ 31 $ 21 $ 4 $ 3 $ 17 Write-Offs (31) (16) (9) (5) (5) — — (5) Credit Loss Expense 20 8 7 2 5 — — 3 Other Adjustments 7 8 3 3 — — — — Balance at June 30, 2022 $ 136 $ 52 $ 52 $ 31 $ 21 $ 4 $ 3 $ 15 Six Months Ended June 30, 2021 and 2022 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Balance at December 31, 2020 $ 146 $ 23 $ 37 $ 23 $ 14 $ 4 $ 3 $ 12 Write-Offs (26) (7) (14) (8) (6) — — (3) Credit Loss Expense 29 16 13 6 7 — — 4 Other Adjustments (26) 10 — — 1 — — — Balance at June 30, 2021 $ 123 $ 42 $ 36 $ 21 $ 16 $ 4 $ 3 $ 13 Balance at December 31, 2021 $ 122 $ 42 $ 36 $ 21 $ 16 $ 4 $ 3 $ 15 Write-Offs (54) (25) (19) (7) (13) — — (6) Credit Loss Expense 44 13 19 6 13 — — 6 Other Adjustments 24 22 16 11 5 — — — Balance at June 30, 2022 $ 136 $ 52 $ 52 $ 31 $ 21 $ 4 $ 3 $ 15 Trade and other receivables are evaluated based on an estimate of the risk of loss over the life of the receivable and current and historical conditions using supportable assumptions. Management evaluates the risk of loss for trade and other receivables by comparing the historical write-off amounts to total revenue over a specified period. Historical loss rates are adjusted due to the impact of current conditions, as well as forecasted conditions over a reasonable time period. The calculated write-off rate can be applied to the receivable balance for which an established reserve does not already exist. Management reviews the assumptions and risk of loss periodically for trade and other receivables. The aging of trade receivables is presented in the table below. Duke Energy considers receivables greater than 30 days outstanding past due. June 30, 2022 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Unbilled Revenue (a)(b) $ 1,175 $ 412 $ 359 $ 205 $ 154 $ 8 $ 24 $ 10 0-30 days 2,202 592 946 451 492 32 41 127 30-60 days 177 52 90 41 49 2 3 8 60-90 days 88 16 44 20 24 1 6 5 90+ days 274 80 96 46 50 43 14 11 Deferred Payment Arrangements (c) 148 62 61 36 25 1 — 4 Trade and Other Receivables $ 4,064 $ 1,214 $ 1,596 $ 799 $ 794 $ 87 $ 88 $ 165 December 31, 2021 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Unbilled Revenue (a)(b) $ 964 $ 316 $ 266 $ 193 $ 73 $ 4 $ 27 $ 106 0-30 days 2,104 595 800 405 393 42 51 202 30-60 days 212 77 72 44 28 4 13 12 60-90 days 88 37 41 21 20 1 1 2 90+ days 249 106 65 37 28 47 11 7 Deferred Payment Arrangements (c) 115 55 45 22 23 2 — 4 Trade and Other Receivables $ 3,732 $ 1,186 $ 1,289 $ 722 $ 565 $ 100 $ 103 $ 333 (a) Unbilled revenues are recognized by applying customer billing rates to the estimated volumes of energy or natural gas delivered but not yet billed and are included within Receivables and Receivables of VIEs on the Condensed Consolidated Balance Sheets. (b) Duke Energy Ohio and Duke Energy Indiana sell, on a revolving basis, nearly all of their retail accounts receivable, including receivables for unbilled revenues, to an affiliate, CRC, and account for the transfers of receivables as sales. Accordingly, the receivables sold are not reflected on the Condensed Consolidated Balance Sheets of Duke Energy Ohio and Duke Energy Indiana. See Note 11 for further information. These receivables for unbilled revenues are $102 million and $199 million for Duke Energy Ohio and Duke Energy Indiana, respectively, as of June 30, 2022, and $82 million and $121 million for Duke Energy Ohio and Duke Energy Indiana, respectively, as of December 31, 2021. (c) Due to certain customer financial hardships created by the COVID-19 pandemic and resulting stay-at-home orders, Duke Energy permitted customers to defer payment of past-due amounts through an installment payment plan over a period of several months.

Stockholders' Equity

Stockholders' Equity	6 Months Ended
	Jun. 30, 2022
Equity [Abstract]
Stockholders' Equity	STOCKHOLDERS' EQUITY Basic EPS is computed by dividing net income available to Duke Energy common stockholders, as adjusted for distributed and undistributed earnings allocated to participating securities and accumulated preferred dividends, by the weighted average number of common shares outstanding during the period. Diluted EPS is computed by dividing net income available to Duke Energy common stockholders, as adjusted for distributed and undistributed earnings allocated to participating securities and accumulated preferred dividends, by the diluted weighted average number of common shares outstanding during the period. Diluted EPS reflects the potential dilution that could occur if securities or other agreements to issue common stock, such as equity forward sale agreements, were exercised or settled. Duke Energy’s participating securities are restricted stock units that are entitled to dividends declared on Duke Energy common stock during the restricted stock unit’s vesting periods. Dividends declared on preferred stock are recorded on the Condensed Consolidated Statements of Operations as a reduction of net income to arrive at net income available to Duke Energy common stockholders. Dividends accumulated on preferred stock are an adjustment to net income used in the calculation of basic and diluted EPS. The following table presents Duke Energy’s basic and diluted EPS calculations, the weighted average number of common shares outstanding and common and preferred share dividends declared. Three Months Ended June 30, Six Months Ended June 30, (in millions, except per share amounts) 2022 2021 2022 2021 Net income available to Duke Energy common stockholders $ 893 $ 751 $ 1,711 $ 1,704 Accumulated preferred stock dividends adjustment (12) (12) — — Less: Impact of participating securities — 1 1 1 Income from continuing operations available to Duke Energy common stockholders $ 881 $ 738 $ 1,710 $ 1,703 Weighted average common shares outstanding – basic and diluted 770 769 770 769 EPS available to Duke Energy common stockholders Basic and diluted $ 1.14 $ 0.96 $ 2.22 $ 2.21 Potentially dilutive items excluded from the calculation (a) 2 2 2 2 Dividends declared per common share $ 0.985 $ 0.965 $ 1.970 $ 1.930 Dividends declared on Series A preferred stock per depositary share (b) $ 0.359 $ 0.359 $ 0.719 $ 0.719 Dividends declared on Series B preferred stock per share (c) $ — $ — $ 24.375 $ 24.375 (a) Performance stock awards were not included in the dilutive securities calculation because the performance measures related to the awards had not been met. (b) 5.75% Series A Cumulative Redeemable Perpetual Preferred Stock dividends are payable quarterly in arrears on the 16th day of March, June, September and December. The preferred stock has a $25 liquidation preference per depositary share. (c) 4.875% Series B Fixed-Rate Reset Cumulative Redeemable Perpetual Preferred Stock dividends are payable semiannually in arrears on the 16th day of March and September. The preferred stock has a $1,000 liquidation preference per share.

Employee Benefit Plans

Employee Benefit Plans	6 Months Ended
	Jun. 30, 2022
Retirement Benefits [Abstract]
Employee Benefit Plans	EMPLOYEE BENEFIT PLANS DEFINED BENEFIT RETIREMENT PLANS Duke Energy and certain subsidiaries maintain, and the Subsidiary Registrants participate in, qualified and non-qualified, non-contributory defined benefit retirement plans. Duke Energy's policy is to fund amounts on an actuarial basis to provide assets sufficient to meet benefit payments to be paid to plan participants. QUALIFIED PENSION PLANS The following tables include the components of net periodic pension costs for qualified pension plans. Three Months Ended June 30, 2022 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Service cost $ 41 $ 14 $ 11 $ 7 $ 6 $ 1 $ 2 $ 2 Interest cost on projected benefit obligation 59 13 18 8 10 3 5 2 Expected return on plan assets (141) (38) (47) (22) (24) (6) (10) (6) Amortization of actuarial loss 23 5 7 4 3 1 3 1 Amortization of prior service credit (4) (1) — — — — (1) (2) Amortization of settlement charges 2 2 — 1 — — — — Net periodic pension costs $ (20) $ (5) $ (11) $ (2) $ (5) $ (1) $ (1) $ (3) Three Months Ended June 30, 2021 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Service cost $ 44 $ 14 $ 12 $ 8 $ 6 $ 1 $ 3 $ 2 Interest cost on projected benefit obligation 55 12 18 8 9 4 4 2 Expected return on plan assets (140) (35) (47) (21) (25) (7) (10) (5) Amortization of actuarial loss 34 8 9 4 5 1 4 3 Amortization of prior service credit (8) (2) — (1) — — (1) (4) Amortization of settlement charges 2 2 — 1 — — — — Net periodic pension costs $ (13) $ (1) $ (8) $ (1) $ (5) $ (1) $ — $ (2) Six Months Ended June 30, 2022 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Service cost $ 81 $ 26 $ 23 $ 14 $ 10 $ 2 $ 4 $ 3 Interest cost on projected benefit obligation 117 27 36 16 20 6 10 4 Expected return on plan assets (281) (76) (93) (44) (48) (11) (19) (12) Amortization of actuarial loss 47 10 13 7 6 2 5 3 Amortization of prior service credit (9) (2) — — — — (1) (4) Amortization of settlement charges 4 3 1 1 — — — — Net periodic pension costs $ (41) $ (12) $ (20) $ (6) $ (12) $ (1) $ (1) $ (6) Six Months Ended June 30, 2021 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Service cost $ 88 $ 28 $ 25 $ 15 $ 11 $ 2 $ 5 $ 3 Interest cost on projected benefit obligation 110 25 35 15 19 7 9 4 Expected return on plan assets (279) (70) (94) (42) (51) (14) (20) (10) Amortization of actuarial loss 67 15 19 9 10 3 7 5 Amortization of prior service credit (15) (4) (1) (1) — — (1) (5) Amortization of settlement charges 4 3 1 1 — — — — Net periodic pension costs $ (25) $ (3) $ (15) $ (3) $ (11) $ (2) $ — $ (3) NON-QUALIFIED PENSION PLANS Net periodic pension costs for non-qualified pension plans were not material for the three and six months ended June 30, 2022, and 2021. OTHER POST-RETIREMENT BENEFIT PLANS Net periodic costs for OPEB plans were not material for the three and six months ended June 30, 2022, and 2021.

Income Taxes

Income Taxes	6 Months Ended
	Jun. 30, 2022
Income Tax Disclosure [Abstract]
Income Taxes	INCOME TAXES EFFECTIVE TAX RATES The ETRs from continuing operations for each of the Duke Energy Registrants are included in the following table. Three Months Ended Six Months Ended June 30, June 30, 2022 2021 2022 2021 Duke Energy 8.0 % 4.9 % 3.6 % 6.8 % Duke Energy Carolinas 7.3 % 0.4 % 7.4 % 4.3 % Progress Energy 16.8 % 8.3 % 16.4 % 10.2 % Duke Energy Progress 13.8 % 2.7 % 13.9 % 5.6 % Duke Energy Florida 20.2 % 19.0 % 20.1 % 19.1 % Duke Energy Ohio 13.8 % 22.0 % (54.7) % 16.1 % Duke Energy Indiana 8.6 % 15.6 % (48.9) % 16.7 % Piedmont 85.7 % 33.3 % 11.4 % 10.8 % The increase in the ETR for Duke Energy for the three months ended June 30, 2022, was primarily due to the amortization of excess deferred taxes in relation to higher pretax income. The decrease in the ETR for Duke Energy for the six months ended June 30, 2022, was primarily due to an increase in the amortization of excess deferred taxes related to the Duke Energy Ohio MGP Settlement. The increase in the ETR for Duke Energy Carolinas for the three and six months ended June 30, 2022, was primarily due to the amortization of excess deferred taxes in relation to higher pretax income. The increase in the ETR for Progress Energy for the three and six months ended June 30, 2022, was primarily due to a decrease in the amortization of excess deferred taxes. The increase in the ETR for Duke Energy Progress for the three and six months ended June 30, 2022, was primarily due to a decrease in the amortization of excess deferred taxes. The increase in the ETR for Duke Energy Florida for the three months ended June 30, 2022, was primarily due to the amortization of excess deferred taxes in relation to higher pretax income. The decrease in the ETR for Duke Energy Ohio for the three months ended June 30, 2022, was primarily due to an increase in the amortization of excess deferred taxes. The decrease in the ETR for Duke Energy Ohio for the six months ended June 30, 2022, was primarily due to an increase in the amortization of excess deferred taxes related to the MGP Settlement. The decrease in the ETR for Duke Energy Indiana for the three months ended June 30, 2022, was primarily due to an increase in the amortization of excess deferred taxes from the coal ash impairment based on the Indiana Supreme Court Opinion. The decrease in the ETR for Duke Energy Indiana for the six months ended June 30, 2022, was primarily due to the coal ash impairment based on the Indiana Supreme Court Opinion and the associated amortization of excess deferred taxes. The increase in the ETR for Piedmont for the three months ended June 30, 2022, was primarily due to certain favorable tax credits, in relation to pretax losses.

Subsequent Events

Subsequent Events	6 Months Ended
	Jun. 30, 2022
Subsequent Events [Abstract]
Subsequent Events	SUBSEQUENT EVENTSFor information on subsequent events related to business segments, regulatory matters, and commitments and contingencies, see Notes 2, 3 and 4.

Organization and Basis of Pre_2

Organization and Basis of Presentation (Policy)	6 Months Ended
	Jun. 30, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	BASIS OF PRESENTATION These Condensed Consolidated Financial Statements have been prepared in accordance with GAAP for interim financial information and with the instructions to Form 10-Q and Regulation S-X. Accordingly, these Condensed Consolidated Financial Statements do not include all information and notes required by GAAP for annual financial statements and should be read in conjunction with the Consolidated Financial Statements in the Duke Energy Registrants’ combined Annual Report on Form 10-K for the year ended December 31, 2021. The information in these combined notes relates to each of the Duke Energy Registrants as noted in the Index to Combined Notes to Condensed Consolidated Financial Statements. However, none of the registrants make any representations as to information related solely to Duke Energy or the subsidiaries of Duke Energy other than itself. These Condensed Consolidated Financial Statements, in the opinion of the respective companies’ management, reflect all normal recurring adjustments necessary to fairly present the financial position and results of operations of each of the Duke Energy Registrants. Amounts reported in Duke Energy’s interim Condensed Consolidated Statements of Operations and each of the Subsidiary Registrants’ interim Condensed Consolidated Statements of Operations and Comprehensive Income are not necessarily indicative of amounts expected for the respective annual periods due to effects of seasonal temperature variations on energy consumption, regulatory rulings, timing of maintenance on electric generating units, changes in mark-to-market valuations, changing commodity prices and other factors. In preparing financial statements that conform to GAAP, management must make estimates and assumptions that affect the reported amounts of assets and liabilities, the reported amounts of revenues and expenses and the disclosure of contingent assets and liabilities at the date of the financial statements. Actual results could differ from those estimates.
Basis of Consolidation and Noncontrolling Interest	BASIS OF CONSOLIDATION These Condensed Consolidated Financial Statements include, after eliminating intercompany transactions and balances, the accounts of the Duke Energy Registrants and subsidiaries or VIEs where the respective Duke Energy Registrants have control. See Note 11 for additional information on VIEs. These Condensed Consolidated Financial Statements also reflect the Duke Energy Registrants’ proportionate share of certain jointly owned generation and transmission facilities. NONCONTROLLING INTEREST Duke Energy maintains a controlling financial interest in certain less than wholly owned nonregulated subsidiaries. As a result, Duke Energy consolidates these subsidiaries and presents the third-party investors' portion of Duke Energy's net income (loss), net assets and comprehensive income (loss) as noncontrolling interest. Noncontrolling interest is included as a component of equity on the Condensed Consolidated Balance Sheets. Several operating agreements of Duke Energy's subsidiaries with noncontrolling interest are subject to allocations of earnings, tax attributes and cash flows in accordance with contractual agreements that vary throughout the lives of the subsidiaries. Therefore, Duke Energy and the other investors' (the owners) interests in the subsidiaries are not fixed, and the subsidiaries apply the Hypothetical Liquidation at Book Value (HLBV) method in allocating income or loss and other comprehensive income or loss (all measured on a pretax basis) to the owners. The HLBV method measures the amounts that each owner would hypothetically claim at each balance sheet reporting date, including tax benefits realized by the owners over the IRS recapture period, upon a hypothetical liquidation of the subsidiary at the net book value of its underlying assets. The change in the amount that each owner would hypothetically receive at the reporting date compared to the amount it would have received on the previous reporting date represents the amount of income or loss allocated to each owner for the reporting period. During September 2021, Duke Energy completed the initial minority interest investment in a portion of Duke Energy Indiana to an affiliate of GIC. GIC's ownership interest in Duke Energy Indiana represents a noncontrolling interest. See Note 2 for additional information on the sale.
Cash, Cash Equivalents, and Restricted Cash	CASH, CASH EQUIVALENTS AND RESTRICTED CASHDuke Energy, Duke Energy Carolinas, Progress Energy, Duke Energy Progress and Duke Energy Florida have restricted cash balances related primarily to collateral assets, escrow deposits and VIEs. See Notes 9 and 11 for additional information. Restricted cash amounts are included in Other within Current Assets and Other Noncurrent Assets on the Condensed Consolidated Balance Sheets.
New Accounting Standards	NEW ACCOUNTING STANDARDS No new accounting standards were adopted by the Duke Energy Registrants in 2022.
Environmental Costs	Liabilities are recorded when losses become probable and are reasonably estimable.Costs are typically expensed as Operation, maintenance and other on the Condensed Consolidated Statements of Operations unless regulatory recovery of the costs is deemed probable.
Derivatives	Duke Energy’s interest rate swaps for its regulated operations employ regulatory accounting. With regulatory accounting, the mark-to-market gains or losses on the swaps are deferred as regulatory liabilities or regulatory assets, respectively. Regulatory assets and liabilities are amortized consistent with the treatment of the related costs in the ratemaking process. The accrual of interest on the swaps is recorded as Interest Expense on the Duke Energy Registrant's Condensed Consolidated Statements of Operations and Comprehensive Income. Cash Flow Hedges For derivatives designated as hedging the exposure to variable cash flows of a future transaction, referred to as a cash flow hedge, the derivative's gain or loss is initially reported as a component of other comprehensive income and subsequently reclassified into earnings once the future transaction impacts earnings. Gains and losses reclassified out of accumulated other comprehensive loss for the three and six months ended June 30, 2022, and 2021, were not material. Duke Energy’s commodity derivatives designated as hedges include long-term electricity sales in the Commercial Renewables segment. Undesignated Contracts Undesignated contracts primarily include contracts not designated as a hedge because they are accounted for under regulatory accounting or contracts that do not qualify for hedge accounting. For the Subsidiary Registrants, bulk power electricity and natural gas purchases flow through fuel adjustment clauses, formula-based contracts or other cost-sharing mechanisms. Differences between the costs included in rates and the incurred costs, including undesignated derivative contracts, are largely deferred as regulatory assets or regulatory liabilities. Piedmont policies allow for the use of financial instruments to hedge commodity price risks. The strategy and objective of these hedging programs are to use the financial instruments to reduce natural gas costs volatility for customers. Duke Energy’s undesignated contracts include long-term electricity sales in the Commercial Renewables segment.
Investments	As a result, the ability to hold investments in unrealized loss positions is outside the control of the Duke Energy Registrants. Accordingly, all unrealized losses associated with debt securities within the Investment Trusts are recognized immediately and deferred to regulatory accounts where appropriate.Unrealized gains and losses on all other AFS securities are included in other comprehensive income until realized, unless it is determined the carrying value of an investment has a credit loss. The Duke Energy Registrants analyze all investment holdings each reporting period to determine whether a decline in fair value is related to a credit loss. If a credit loss exists, the unrealized credit loss is included in earnings.
Revenue from Contract with Customer	Duke Energy earns substantially all of its revenues through its reportable segments, Electric Utilities and Infrastructure, Gas Utilities and Infrastructure and Commercial Renewables.
Earnings Per Share	Basic EPS is computed by dividing net income available to Duke Energy common stockholders, as adjusted for distributed and undistributed earnings allocated to participating securities and accumulated preferred dividends, by the weighted average number of common shares outstanding during the period. Diluted EPS is computed by dividing net income available to Duke Energy common stockholders, as adjusted for distributed and undistributed earnings allocated to participating securities and accumulated preferred dividends, by the diluted weighted average number of common shares outstanding during the period. Diluted EPS reflects the potential dilution that could occur if securities or other agreements to issue common stock, such as equity forward sale agreements, were exercised or settled. Duke Energy’s participating securities are restricted stock units that are entitled to dividends declared on Duke Energy common stock during the restricted stock unit’s vesting periods. Dividends declared on preferred stock are recorded on the Condensed Consolidated Statements of Operations as a reduction of net income to arrive at net income available to Duke Energy common stockholders. Dividends accumulated on preferred stock are an adjustment to net income used in the calculation of basic and diluted EPS.

Organization and Basis of Pre_3

Organization and Basis of Presentation (Tables)	6 Months Ended
	Jun. 30, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Schedule of Allocated Losses from Subsidiaries, Noncontrolling Interest	The following table presents allocated losses to noncontrolling interest for the three and six months ended June 30, 2022, and 2021. Three Months Ended June 30, Six Months Ended June 30, (in millions) 2022 2021 2022 2021 Noncontrolling Interest Allocation of Income Allocated losses to noncontrolling tax equity members utilizing the HLBV method $ 44 $ 55 $ 68 $ 98 Allocated (income) losses to noncontrolling members based on pro rata shares of ownership (17) 12 (4) 20 Total Noncontrolling Interest Allocated Losses $ 27 $ 67 $ 64 $ 118
Schedule of Cash, Cash Equivalents and Restricted Cash	The following table presents the components of cash, cash equivalents and restricted cash included in the Condensed Consolidated Balance Sheets. June 30, 2022 December 31, 2021 Duke Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Duke Energy Progress Energy Energy Energy Carolinas Energy Progress Florida Energy Carolinas Energy Progress Florida Current Assets Cash and cash equivalents $ 428 $ 37 $ 129 $ 75 $ 44 $ 343 $ 7 $ 70 $ 35 $ 23 Other 193 9 59 26 33 170 — 39 — 39 Other Noncurrent Assets Other 18 1 4 4 — 7 1 4 4 — Total cash, cash equivalents and restricted cash $ 639 $ 47 $ 192 $ 105 $ 77 $ 520 $ 8 $ 113 $ 39 $ 62
Schedule of Utility Inventory	The components of inventory are presented in the tables below. June 30, 2022 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Materials and supplies $ 2,490 $ 817 $ 1,124 $ 769 $ 355 $ 88 $ 321 $ 13 Coal 446 182 132 79 53 14 117 — Natural gas, oil and other fuel 272 34 170 100 70 10 3 55 Total inventory $ 3,208 $ 1,033 $ 1,426 $ 948 $ 478 $ 112 $ 441 $ 68 December 31, 2021 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Materials and supplies $ 2,397 $ 793 $ 1,067 $ 729 $ 338 $ 80 $ 311 $ 14 Coal 486 195 167 94 73 19 105 — Natural gas, oil and other fuel 316 38 164 98 66 17 2 95 Total inventory $ 3,199 $ 1,026 $ 1,398 $ 921 $ 477 $ 116 $ 418 $ 109

Business Segments (Tables)

Business Segments (Tables)	6 Months Ended
	Jun. 30, 2022
Segment Reporting Information [Line Items]
Business Segment Data	Business segment information is presented in the following tables. Segment assets presented exclude intercompany assets. Three Months Ended June 30, 2022 Electric Gas Total Utilities and Utilities and Commercial Reportable (in millions) Infrastructure Infrastructure Renewables Segments Other Eliminations Total Unaffiliated revenues $ 6,126 $ 430 $ 121 $ 6,677 $ 8 $ — $ 6,685 Intersegment revenues 9 23 — 32 22 (54) — Total revenues $ 6,135 $ 453 $ 121 $ 6,709 $ 30 $ (54) $ 6,685 Segment income (loss) (a) $ 974 $ 19 $ 30 $ 1,023 $ (130) $ — $ 893 Less: Noncontrolling interests 27 Add: Preferred stock dividend 14 Net Income $ 880 Segment assets $ 145,874 $ 15,420 $ 7,276 $ 168,570 $ 3,821 $ (8) $ 172,383 Three Months Ended June 30, 2021 Electric Gas Total Utilities and Utilities and Commercial Reportable (in millions) Infrastructure Infrastructure Renewables Segments Other Eliminations Total Unaffiliated revenues $ 5,328 $ 305 $ 119 $ 5,752 $ 6 $ — $ 5,758 Intersegment revenues 7 22 — 29 21 (50) — Total revenues $ 5,335 $ 327 $ 119 $ 5,781 $ 27 $ (50) $ 5,758 Segment income (loss) (b) $ 935 $ 17 $ 47 $ 999 $ (248) $ — $ 751 Less: Noncontrolling interests 67 Add: Preferred stock dividend 14 Net Income $ 698 (a) Electric Utilities and Infrastructure includes $2 million within Noncontrolling Interests related to the Duke Energy Indiana Supreme Court ruling on the Condensed Consolidated Statements of Operations. See Note 3 for additional information. Commercial Renewables includes a $21 million loss recorded within Nonregulated electric and other revenues related to mark-to-market derivative contracts on the Condensed Consolidated Statements of Operations. (b) Gas Utilities and Infrastructure includes $16 million, recorded within Equity in earnings (losses) of unconsolidated affiliates on the Condensed Consolidated Statements of Operations, related to gas pipeline investments. Other includes $131 million recorded within Impairment of assets and other charges, $27 million within Operations, maintenance and other, and $17 million within Depreciation and amortization on the Condensed Consolidated Statements of Operations, related to the workplace and workplace realignment. Six Months Ended June 30, 2022 Electric Gas Total Utilities and Utilities and Commercial Reportable (in millions) Infrastructure Infrastructure Renewables Segments Other Eliminations Total Unaffiliated revenues $ 12,121 $ 1,439 $ 242 $ 13,802 $ 15 $ — $ 13,817 Intersegment revenues 16 46 — 62 45 (107) — Total revenues $ 12,137 $ 1,485 $ 242 $ 13,864 $ 60 $ (107) $ 13,817 Segment income (loss) (a) $ 1,697 $ 273 $ 41 $ 2,011 $ (300) $ — $ 1,711 Less: Noncontrolling interests 64 Add: Preferred stock dividend 53 Net Income $ 1,700 Six Months Ended June 30, 2021 Electric Gas Total Utilities and Utilities and Commercial Reportable (in millions) Infrastructure Infrastructure Renewables Segments Other Eliminations Total Unaffiliated revenues $ 10,601 $ 1,057 $ 238 $ 11,896 $ 12 $ — $ 11,908 Intersegment revenues 15 45 — 60 41 (101) — Total revenues $ 10,616 $ 1,102 $ 238 $ 11,956 $ 53 $ (101) $ 11,908 Segment income (loss) (b) $ 1,755 $ 262 $ 74 $ 2,091 $ (387) $ — $ 1,704 Less: Noncontrolling interests 118 Add: Preferred stock dividend 53 Net Income $ 1,639 (a) Electric Utilities and Infrastructure includes $211 million recorded within Impairment of assets and other charges, $46 million within Regulated electric revenues and $20 million within Noncontrolling Interests related to the Duke Energy Indiana Supreme Court ruling on the Condensed Consolidated Statements of Operations. See Note 3 for additional information. Commercial Renewables includes a $21 million loss recorded within Nonregulated electric and other revenues related to mark-to-market derivative contracts on the Condensed Consolidated Statements of Operations. (b) Gas Utilities and Infrastructure includes $22 million, recorded within Equity in earnings (losses) of unconsolidated affiliates on the Condensed Consolidated Statements of Operations, related to gas pipeline investments. Commercial Renewables includes a $35 million loss related to Texas Storm Uri, of which ($8 million) is recorded within Nonregulated electric and other revenues, $2 million within Operations, maintenance and other, $29 million within Equity in earnings (losses) of unconsolidated affiliates and $12 million within Loss Attributable to Noncontrolling Interests on the Condensed Consolidated Statements of Operations. See Note 4 for additional information. Other includes $131 million recorded within Impairment of assets and other charges, $27 million within Operations, maintenance and other, and $17 million within Depreciation and amortization on the Condensed Consolidated Statements of Operations, related to the workplace and workplace realignment.
Duke Energy Ohio
Segment Reporting Information [Line Items]
Business Segment Data	Three Months Ended June 30, 2022 Electric Gas Total Utilities and Utilities and Reportable (in millions) Infrastructure Infrastructure Segments Other Eliminations Total Total revenues $ 401 $ 144 $ 545 $ — $ — $ 545 Segment income/Net (loss) income $ 37 $ 19 $ 56 $ — $ — $ 56 Segment assets $ 7,237 $ 3,899 $ 11,136 $ 14 $ (135) $ 11,015 Three Months Ended June 30, 2021 Electric Gas Total Utilities and Utilities and Reportable (in millions) Infrastructure Infrastructure Segments Other Total Total revenues $ 343 $ 113 $ 456 $ — $ 456 Segment income/Net (loss) income $ 24 $ 23 $ 47 $ (8) $ 39 Six Months Ended June 30, 2022 Electric Gas Total Utilities and Utilities and Reportable (in millions) Infrastructure Infrastructure Segments Other Total Total revenues $ 813 $ 370 $ 1,183 $ — $ 1,183 Segment income/Net (loss) income $ 78 $ 57 $ 135 $ (2) $ 133 Six Months Ended June 30, 2021 Electric Gas Total Utilities and Utilities and Reportable (in millions) Infrastructure Infrastructure Segments Other Total Total revenues $ 706 $ 282 $ 988 $ — $ 988 Segment income/Net (loss) income $ 74 $ 66 $ 140 $ (10) $ 130

Regulatory Matters (Tables)

Regulatory Matters (Tables)	6 Months Ended
	Jun. 30, 2022
Regulated Operations [Abstract]
Schedule of Potential Plant Retirements	The table below contains the net carrying value of generating facilities planned for retirement or included in recent IRPs as evaluated for potential retirement. Dollar amounts in the table below are included in Net property, plant and equipment on the Condensed Consolidated Balance Sheets as of June 30, 2022, and exclude capitalized asset retirement costs. Remaining Net Capacity Book Value (in MW) (in millions) Duke Energy Carolinas Allen Steam Station Unit 1 (a) 167 $ 12 Allen Steam Station Unit 5 (b) 259 265 Cliffside Unit 5 (b) 546 362 Duke Energy Progress Mayo Unit 1 (b) 713 634 Roxboro Units 3-4 (b) 1,409 443 Duke Energy Florida Crystal River Units 4-5 (c) 1,442 1,615 Duke Energy Indiana Gibson Units 1-5 (d) 2,845 2,058 Cayuga Units 1-2 (d) 1,005 660 Total Duke Energy 8,386 $ 6,049 (a) As part of the 2015 resolution of a lawsuit involving alleged New Source Review violations, Duke Energy Carolinas must retire Allen Steam Station Unit 1 by December 31, 2024. The long-term energy options considered in the IRP could result in retirement of this unit earlier than its current estimated useful life. (b) These units were inc luded in the IRP filed by Duke Energy Carolinas and Duke Energy Progress in North Carolina and South Carolina on September 1, 2020. The long-term energy options considered in the IRP could result in retirement of these units earlier than their current estimated useful lives. (c) On January 14, 2021, Duke Energy Florida filed the 2021 Settlement agreement with the FPSC, which proposed depreciation rates reflecting retirement dates for Duke Energy Florida's last two coal-fired generating facilities, Crystal River Units 4-5, eight years ahead of schedule in 2034 rather than in 2042. The FPSC approved the 2021 Settlement on May 4, 2021. (d) The rate case filed July 2, 2019, included proposed depreciation rates reflecting retirement dates from 2026 to 2038. The depreciation rates reflecting these updated retirement dates were approved by the IURC as part of the rate case order issued on June 29, 2020.

Commitments and Contingencies (

Commitments and Contingencies (Tables)	6 Months Ended
	Jun. 30, 2022
Commitments and Contingencies Disclosure [Abstract]
Schedule of Reserves	The following table contains information regarding reserves for probable and estimable costs related to the various environmental sites. These reserves are recorded in Other within Other Noncurrent Liabilities on the Condensed Consolidated Balance Sheets. (in millions) June 30, 2022 December 31, 2021 Reserves for Environmental Remediation Duke Energy $ 90 $ 88 Duke Energy Carolinas 24 19 Progress Energy 23 23 Duke Energy Progress 12 11 Duke Energy Florida 10 11 Duke Energy Ohio 33 34 Duke Energy Indiana 3 4 Piedmont 7 9

Debt and Credit Facilities (Tab

Debt and Credit Facilities (Tables)	6 Months Ended
	Jun. 30, 2022
Debt Disclosure [Abstract]
Schedule of Long-term Debt Instruments	The following table summarizes significant debt issuances (in millions). Six Months Ended June 30, 2022 Duke Duke Duke Maturity Interest Duke Energy Energy Energy Issuance Date Date Rate Energy (Parent) Carolinas Progress Piedmont Unsecured Debt May 2022 (a) May 2052 5.050 % $ 400 $ — $ — $ — $ 400 June 2022 (b) June 2028 4.750 % 645 645 — — — June 2022 (b) June 2034 5.306 % 537 537 — — — First Mortgage Bonds March 2022 (c) March 2032 2.850 % 500 — 500 — — March 2022 (c) March 2052 3.550 % 650 — 650 — — March 2022 (c) April 2032 3.400 % 500 — — 500 — March 2022 (c) April 2052 4.000 % 400 — — 400 — Tax-exempt Bonds June 2022 (d) September 2030 4.000 % 168 168 — — — June 2022 (d) November 2039 4.250 % 234 234 — — — Total issuances $ 4,034 $ 1,584 $ 1,150 $ 900 $ 400 (a) Proceeds will be used to pay down a portion of outstanding intercompany short-term debt and for general corporate purposes (b) Duke Energy (Parent) issued 600 million euros aggregate principal amount of 3.10% senior notes due June 2028 and 500 million euros aggregate principal amount of 3.85% senior notes due June 2034. Proceeds will be used to repay a $500 million debt maturity, pay down short-term debt and for general corporate purposes. Duke Energy's obligations under its euro-denominated fixed-rate notes were effectively converted to fixed-rate U.S. dollars at issuance through cross-currency swaps, mitigating foreign currency exchange risk associated with the interest and principal payments. See Note 8 for additional information. (c) Proceeds will be used to finance or refinance, in whole or in part, existing or new eligible projects under the sustainable financing framework. (d) Proceeds were used to refund the Ohio Air Quality Development Revenue Refunding bonds, previously held in treasury, which were used to finance or refinance portions of certain solid waste disposal facilities. The mandatory purchase date of these bonds is June 1, 2027. The following table shows the significant components of Current maturities of long-term debt on the Condensed Consolidated Balance Sheets. The Duke Energy Registrants currently anticipate satisfying these obligations with cash on hand and proceeds from additional borrowings. (in millions) Maturity Date Interest Rate June 30, 2022 Unsecured Debt (a) Duke Energy (Parent) August 2022 2.400 % 500 Duke Energy (Parent) April 2023 2.875 % 350 Duke Energy (Parent) (b) June 2023 1.938 % 500 First Mortgage Bonds Duke Energy Carolinas March 2023 2.500 % 500 Duke Energy Carolinas March 2023 3.050 % 500 Other (c) 821 Current maturities of long-term debt $ 3,171 (a) In May 2022, Duke Energy (Parent) early retired $500 million of unsecured debt with an original maturity date of August 2022. (b) Debt has a floating interest rate. (c) Includes finance lease obligations, amortizing debt, tax-exempt bonds with mandatory put options and small bullet maturities.
Schedule of Line of Credit Facilities	The table below includes the current borrowing sublimits and available capacity under these credit facilities. June 30, 2022 Duke Duke Duke Duke Duke Duke Duke Energy Energy Energy Energy Energy Energy (in millions) Energy (Parent) Carolinas Progress Florida Ohio Indiana Piedmont Facility size (a) $ 9,000 $ 3,150 $ 1,225 $ 1,200 $ 1,100 $ 775 $ 750 $ 800 Reduction to backstop issuances Commercial paper (b) (3,516) (1,853) (326) (150) (458) (299) (400) (30) Outstanding letters of credit (38) (25) (4) (2) (7) — — — Tax-exempt bonds (81) — — — — — (81) — Available capacity under the Master Credit Facility $ 5,365 $ 1,272 $ 895 $ 1,048 $ 635 $ 476 $ 269 $ 770 (a) Represents the sublimit of each borrower.

Goodwill (Tables)

Goodwill (Tables)	6 Months Ended
	Jun. 30, 2022
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill By Reportable Operating Segment	The following table presents the goodwill by reportable segment included on Duke Energy's Condensed Consolidated Balance Sheets at June 30, 2022, and December 31, 2021. Electric Utilities Gas Utilities Commercial (in millions) and Infrastructure and Infrastructure Renewables Total Goodwill balance $ 17,379 $ 1,924 $ 122 $ 19,425 Accumulated impairment charges — — (122) (122) Goodwill, adjusted for accumulated impairment charges $ 17,379 $ 1,924 $ — $ 19,303

Related Party Transactions (Tab

Related Party Transactions (Tables)	6 Months Ended
	Jun. 30, 2022
Related Party Transactions [Abstract]
Schedule of Related Party Transactions, Other Revenue and Expense	Material amounts related to transactions with related parties included on the Condensed Consolidated Statements of Operations and Comprehensive Income are presented in the following table. Three Months Ended June 30, Six Months Ended June 30, (in millions) 2022 2021 2022 2021 Duke Energy Carolinas Corporate governance and shared service expenses (a) $ 191 $ 243 $ 397 $ 446 Indemnification coverages (b) 7 6 14 12 Joint Dispatch Agreement (JDA) revenue (c) 12 13 38 26 JDA expense (c) 173 25 267 65 Intercompany natural gas purchases (d) 5 15 9 29 Progress Energy Corporate governance and shared service expenses (a) $ 184 $ 233 $ 380 $ 414 Indemnification coverages (b) 11 11 22 21 JDA revenue (c) 173 25 267 65 JDA expense (c) 12 13 38 26 Intercompany natural gas purchases (d) 19 18 38 37 Duke Energy Progress Corporate governance and shared service expenses (a) $ 108 $ 141 $ 227 $ 246 Indemnification coverages (b) 5 5 10 10 JDA revenue (c) 173 25 267 65 JDA expense (c) 12 13 38 26 Intercompany natural gas purchases (d) 19 18 38 37 Duke Energy Florida Corporate governance and shared service expenses (a) $ 76 $ 92 $ 153 $ 168 Indemnification coverages (b) 6 6 12 11 Duke Energy Ohio Corporate governance and shared service expenses (a) $ 82 $ 79 $ 164 $ 158 Indemnification coverages (b) 1 1 2 2 Duke Energy Indiana Corporate governance and shared service expenses (a) $ 91 $ 93 $ 215 $ 206 Indemnification coverages (b) 2 2 4 4 Piedmont Corporate governance and shared service expenses (a) $ 37 $ 36 $ 72 $ 69 Indemnification coverages (b) 2 1 3 2 Intercompany natural gas sales (d) 24 33 47 66 Natural gas storage and transportation costs (e) 5 5 11 11 (a) The Subsidiary Registrants are charged their proportionate share of corporate governance and other shared services costs, primarily related to human resources, employee benefits, information technology, legal and accounting fees, as well as other third-party costs. These amounts are primarily recorded in Operation, maintenance and other and Impairment of assets and other charges on the Condensed Consolidated Statements of Operations and Comprehensive Income. (b) The Subsidiary Registrants incur expenses related to certain indemnification coverages through Bison, Duke Energy’s wholly owned captive insurance subsidiary. These expenses are recorded in Operation, maintenance and other on the Condensed Consolidated Statements of Operations and Comprehensive Income. (c) Duke Energy Carolinas and Duke Energy Progress participate in a JDA, which allows the collective dispatch of power plants between the service territories to reduce customer rates. Revenues from the sale of power and expenses from the purchase of power pursuant to the JDA are recorded in Operating Revenues and Fuel used in electric generation and purchased power, respectively, on the Condensed Consolidated Statements of Operations and Comprehensive Income. (d) Piedmont provides long-term natural gas delivery service to certain Duke Energy Carolinas and Duke Energy Progress natural gas-fired generation facilities. Piedmont records the sales in Operating Revenues, and Duke Energy Carolinas and Duke Energy Progress record the related purchases as a component of Fuel used in electric generation and purchased power on their respective Condensed Consolidated Statements of Operations and Comprehensive Income. Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Carolinas Energy Progress Florida Ohio Indiana Piedmont June 30, 2022 Intercompany income tax receivable $ 17 $ — $ — $ — $ 2 $ — $ 19 Intercompany income tax payable — 22 29 54 — 17 — December 31, 2021 Intercompany income tax receivable $ — $ — $ — $ 40 $ 19 $ — $ — Intercompany income tax payable 62 — 84 — — 10 27

Derivatives and Hedging (Tables

Derivatives and Hedging (Tables)	6 Months Ended
	Jun. 30, 2022
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Notional Amounts of Outstanding Derivative Positions	The following table shows notional amounts of outstanding derivatives related to interest rate risk. June 30, 2022 Duke Duke Duke Duke Energy Energy Energy (in millions) Energy Carolinas Indiana Ohio Cash flow hedges $ 2,877 $ — $ — $ — Undesignated contracts 577 250 300 27 Total notional amount (a) $ 3,454 $ 250 $ 300 $ 27 December 31, 2021 Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy (in millions) Energy Carolinas Energy Progress Indiana Ohio Cash flow hedges $ 2,415 $ — $ — $ — $ — $ — Undesignated contracts 1,177 350 500 500 300 27 Total notional amount (a) $ 3,592 $ 350 $ 500 $ 500 $ 300 $ 27 (a) Duke Energy includes amounts related to consolidated VIEs of $627 million and $665 million in cash flow hedges as of June 30, 2022, and December 31, 2021, respectively. The tables below include volumes of outstanding commodity derivatives. Amounts disclosed represent the absolute value of notional volumes of commodity contracts excluding NPNS. The Duke Energy Registrants have netted contractual amounts where offsetting purchase and sale contracts exist with identical delivery locations and times of delivery. Where all commodity positions are perfectly offset, no quantities are shown. June 30, 2022 Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy Carolinas Energy Progress Ohio Indiana Piedmont Electricity (GWh) (a) 39,032 — — — 4,002 24,241 — Natural gas (millions of dekatherms) 873 283 259 259 — 13 318 December 31, 2021 Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy Carolinas Energy Progress Ohio Indiana Piedmont Electricity (GWh) (a) 22,344 — — — 1,681 10,688 — Natural gas (millions of dekatherms) 823 264 215 215 — 8 336 (a) Duke Energy includes 4,477 GWh and 9,975 GWh related to cash flow hedges as of June 30, 2022, and December 31, 2021, respectively. The following table shows Duke Energy's outstanding derivatives related to foreign currency risk. There were no fair value hedges in 2021. June 30, 2022 Receive Fair Value Pay Notional Notional Receive Hedge Gain (Loss) (a) (in millions) Pay Rate (in millions) Rate Maturity Date (in millions) Fair value hedges $ 645 4.75 % 600 euros 3.10 % June 2028 $ (16) 537 5.31 % 500 euros 3.85 % June 2034 (13) Total notional amount $ 1,182 1,100 euros $ (29)
Location And Fair Value Of Derivatives Recognized in the Condensed Consolidated Balance Sheets	The following tables show the fair value and balance sheet location of derivative instruments. Although derivatives subject to master netting arrangements are netted on the Condensed Consolidated Balance Sheets, the fair values presented below are shown gross and cash collateral on the derivatives has not been netted against the fair values shown. Derivative Assets June 30, 2022 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Commodity Contracts Not Designated as Hedging Instruments Current $ 571 $ 268 $ 203 $ 203 $ — $ 5 $ 86 $ — Noncurrent 350 186 165 165 — — — — Total Derivative Assets – Commodity Contracts $ 921 $ 454 $ 368 $ 368 $ — $ 5 $ 86 $ — Interest Rate Contracts Designated as Hedging Instruments Current $ 242 $ — $ — $ — $ — $ — $ — $ — Noncurrent 88 — — — — — — — Not Designated as Hedging Instruments Current 55 — — — — — 55 — Noncurrent 30 30 — — — — — — Total Derivative Assets – Interest Rate Contracts $ 415 $ 30 $ — $ — $ — $ — $ 55 $ — Total Derivative Assets $ 1,336 $ 484 $ 368 $ 368 $ — $ 5 $ 141 $ — Derivative Liabilities June 30, 2022 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Commodity Contracts Designated as Hedging Instruments Current $ 35 $ — $ — $ — $ — $ — $ — — Noncurrent 114 — — — — — — — Not Designated as Hedging Instruments Current 135 32 33 1 33 — 21 25 Noncurrent 259 9 10 10 — — — 168 Total Derivative Liabilities – Commodity Contracts $ 543 $ 41 $ 43 $ 11 $ 33 $ — $ 21 $ 193 Interest Rate Contracts Designated as Hedging Instruments Current $ 1 $ — $ — $ — $ — $ — $ — $ — Noncurrent 2 — — — — — — — Not Designated as Hedging Instruments Current 1 — — — — 1 — — Noncurrent 2 — — — — 2 — — Total Derivative Liabilities – Interest Rate Contracts $ 6 $ — $ — $ — $ — $ 3 $ — $ — Foreign Currency Contracts Designated as Hedging Instruments Current $ 18 $ — $ — $ — $ — $ — $ — $ — Noncurrent 26 — — — — — — — Total Derivative Liabilities – Foreign Currency Contracts $ 44 $ — $ — $ — $ — $ — $ — $ — Total Derivative Liabilities $ 593 $ 41 $ 43 $ 11 $ 33 $ 3 $ 21 $ 193 Derivative Assets December 31, 2021 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Commodity Contracts Not Designated as Hedging Instruments Current $ 199 $ 99 $ 72 $ 72 $ — $ 2 $ 23 $ 3 Noncurrent 113 63 50 50 — — — — Total Derivative Assets – Commodity Contracts $ 312 $ 162 $ 122 $ 122 $ — $ 2 $ 23 $ 3 Interest Rate Contracts Designated as Hedging Instruments Current $ 3 $ — $ — $ — $ — $ — $ — $ — Noncurrent 3 — — — — — — — Not Designated as Hedging Instruments Current 2 — 2 2 — — — — Total Derivative Assets – Interest Rate Contracts $ 8 $ — $ 2 $ 2 $ — $ — $ — $ — Total Derivative Assets $ 320 $ 162 $ 124 $ 124 $ — $ 2 $ 23 $ 3 Derivative Liabilities December 31, 2021 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Commodity Contracts Designated as Hedging Instruments Current $ 27 $ — $ — $ — $ — $ — $ — $ — Noncurrent 117 — — — — — — — Not Designated as Hedging Instruments Current 72 18 19 5 14 — 13 21 Noncurrent 132 9 5 5 — — — 118 Total Derivative Liabilities – Commodity Contracts $ 348 $ 27 $ 24 $ 10 $ 14 $ — $ 13 $ 139 Interest Rate Contracts Designated as Hedging Instruments Current $ 75 $ — $ — $ — $ — $ — $ — $ — Noncurrent 21 — — — — — — — Not Designated as Hedging Instruments Current 10 8 — — — 1 — — Noncurrent 18 — — — — 4 14 — Total Derivative Liabilities – Interest Rate Contracts $ 124 $ 8 $ — $ — $ — $ 5 $ 14 $ — Total Derivative Liabilities $ 472 $ 35 $ 24 $ 10 $ 14 $ 5 $ 27 $ 139
Offsetting Assets	The following tables present the line items on the Condensed Consolidated Balance Sheets where derivatives are reported. Substantially all of Duke Energy's outstanding derivative contracts are subject to enforceable master netting arrangements. The gross amounts offset in the tables below show the effect of these netting arrangements on financial position, and include cash collateral posted to offset the net position. The amounts shown are calculated by counterparty. Accounts receivable or accounts payable and letters of credit may also be available to offset exposures in the event of bankruptcy. These amounts are not included in the tables below. Derivative Assets June 30, 2022 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Current Gross amounts recognized $ 868 $ 268 $ 203 $ 203 $ — $ 5 $ 141 $ — Gross amounts offset (331) (193) (137) (137) — — — — Net amounts presented in Current Assets: Other $ 537 $ 75 $ 66 $ 66 $ — $ 5 $ 141 $ — Noncurrent Gross amounts recognized $ 468 $ 216 $ 165 $ 165 $ — $ — $ — $ — Gross amounts offset (242) (125) (117) (117) — — — — Net amounts presented in Other Noncurrent Assets: Other $ 226 $ 91 $ 48 $ 48 $ — $ — $ — $ — Derivative Liabilities June 30, 2022 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Current Gross amounts recognized $ 190 $ 32 $ 33 $ 1 $ 33 $ 1 $ 21 $ 25 Gross amounts offset (19) (1) (1) (1) — — (17) — Net amounts presented in Current Liabilities: Other $ 171 $ 31 $ 32 $ — $ 33 $ 1 $ 4 $ 25 Noncurrent Gross amounts recognized $ 403 $ 9 $ 10 $ 10 $ — $ 2 $ — $ 168 Gross amounts offset (19) (9) (10) (10) — — — — Net amounts presented in Other Noncurrent Liabilities: Other $ 384 $ — $ — $ — $ — $ 2 $ — $ 168 Derivative Assets December 31, 2021 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Current Gross amounts recognized $ 204 $ 99 $ 74 $ 74 $ — $ 2 $ 23 $ 3 Gross amounts offset (25) (16) (9) (9) — — — — Net amounts presented in Current Assets: Other $ 179 $ 83 $ 65 $ 65 $ — $ 2 $ 23 $ 3 Noncurrent Gross amounts recognized $ 116 $ 63 $ 50 $ 50 $ — $ — $ — $ — Gross amounts offset (23) (15) (8) (8) — — — — Net amounts presented in Other Noncurrent Assets: Other $ 93 $ 48 $ 42 $ 42 $ — $ — $ — $ — Derivative Liabilities December 31, 2021 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Current Gross amounts recognized $ 184 $ 26 $ 19 $ 5 $ 14 $ 1 $ 13 $ 21 Gross amounts offset (11) (6) (5) (5) — — — — Net amounts presented in Current Liabilities: Other $ 173 $ 20 $ 14 $ — $ 14 $ 1 $ 13 $ 21 Noncurrent Gross amounts recognized $ 288 $ 9 $ 5 $ 5 $ — $ 4 $ 14 $ 118 Gross amounts offset (12) (8) (5) (5) — — — — Net amounts presented in Other Noncurrent Liabilities: Other $ 276 $ 1 $ — $ — $ — $ 4 $ 14 $ 118
Offsetting Liabilities	The following tables present the line items on the Condensed Consolidated Balance Sheets where derivatives are reported. Substantially all of Duke Energy's outstanding derivative contracts are subject to enforceable master netting arrangements. The gross amounts offset in the tables below show the effect of these netting arrangements on financial position, and include cash collateral posted to offset the net position. The amounts shown are calculated by counterparty. Accounts receivable or accounts payable and letters of credit may also be available to offset exposures in the event of bankruptcy. These amounts are not included in the tables below. Derivative Assets June 30, 2022 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Current Gross amounts recognized $ 868 $ 268 $ 203 $ 203 $ — $ 5 $ 141 $ — Gross amounts offset (331) (193) (137) (137) — — — — Net amounts presented in Current Assets: Other $ 537 $ 75 $ 66 $ 66 $ — $ 5 $ 141 $ — Noncurrent Gross amounts recognized $ 468 $ 216 $ 165 $ 165 $ — $ — $ — $ — Gross amounts offset (242) (125) (117) (117) — — — — Net amounts presented in Other Noncurrent Assets: Other $ 226 $ 91 $ 48 $ 48 $ — $ — $ — $ — Derivative Liabilities June 30, 2022 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Current Gross amounts recognized $ 190 $ 32 $ 33 $ 1 $ 33 $ 1 $ 21 $ 25 Gross amounts offset (19) (1) (1) (1) — — (17) — Net amounts presented in Current Liabilities: Other $ 171 $ 31 $ 32 $ — $ 33 $ 1 $ 4 $ 25 Noncurrent Gross amounts recognized $ 403 $ 9 $ 10 $ 10 $ — $ 2 $ — $ 168 Gross amounts offset (19) (9) (10) (10) — — — — Net amounts presented in Other Noncurrent Liabilities: Other $ 384 $ — $ — $ — $ — $ 2 $ — $ 168 Derivative Assets December 31, 2021 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Current Gross amounts recognized $ 204 $ 99 $ 74 $ 74 $ — $ 2 $ 23 $ 3 Gross amounts offset (25) (16) (9) (9) — — — — Net amounts presented in Current Assets: Other $ 179 $ 83 $ 65 $ 65 $ — $ 2 $ 23 $ 3 Noncurrent Gross amounts recognized $ 116 $ 63 $ 50 $ 50 $ — $ — $ — $ — Gross amounts offset (23) (15) (8) (8) — — — — Net amounts presented in Other Noncurrent Assets: Other $ 93 $ 48 $ 42 $ 42 $ — $ — $ — $ — Derivative Liabilities December 31, 2021 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Current Gross amounts recognized $ 184 $ 26 $ 19 $ 5 $ 14 $ 1 $ 13 $ 21 Gross amounts offset (11) (6) (5) (5) — — — — Net amounts presented in Current Liabilities: Other $ 173 $ 20 $ 14 $ — $ 14 $ 1 $ 13 $ 21 Noncurrent Gross amounts recognized $ 288 $ 9 $ 5 $ 5 $ — $ 4 $ 14 $ 118 Gross amounts offset (12) (8) (5) (5) — — — — Net amounts presented in Other Noncurrent Liabilities: Other $ 276 $ 1 $ — $ — $ — $ 4 $ 14 $ 118

Investments in Debt and Equit_2

Investments in Debt and Equity Securities (Tables)	6 Months Ended
	Jun. 30, 2022
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Trading, and Equity Securities, FV-NI	The following table presents the estimated fair value of investments in debt and equity securities; equity investments are classified as FV-NI and debt investments are classified as AFS. June 30, 2022 December 31, 2021 Gross Gross Gross Gross Unrealized Unrealized Estimated Unrealized Unrealized Estimated Holding Holding Fair Holding Holding Fair (in millions) Gains Losses Value Gains Losses Value NDTF Cash and cash equivalents $ — $ — $ 134 $ — $ — $ 160 Equity securities 3,500 141 5,751 4,905 43 7,350 Corporate debt securities — 81 728 39 6 829 Municipal bonds — 32 334 14 1 314 U.S. government bonds 2 89 1,462 31 12 1,568 Other debt securities — 14 170 3 1 180 Total NDTF Investments $ 3,502 $ 357 $ 8,579 $ 4,992 $ 63 $ 10,401 Other Investments Cash and cash equivalents $ — $ — $ 51 $ — $ — $ 36 Equity securities 20 17 124 36 — 156 Corporate debt securities — 13 108 2 1 119 Municipal bonds — 3 82 3 1 80 U.S. government bonds — 5 49 — — 56 Other debt securities — 2 35 — 1 45 Total Other Investments $ 20 $ 40 $ 449 $ 41 $ 3 $ 492 Total Investments $ 3,522 $ 397 $ 9,028 $ 5,033 $ 66 $ 10,893
Debt Securities, Available-for-sale	The following table presents the estimated fair value of investments in debt and equity securities; equity investments are classified as FV-NI and debt investments are classified as AFS. June 30, 2022 December 31, 2021 Gross Gross Gross Gross Unrealized Unrealized Estimated Unrealized Unrealized Estimated Holding Holding Fair Holding Holding Fair (in millions) Gains Losses Value Gains Losses Value NDTF Cash and cash equivalents $ — $ — $ 134 $ — $ — $ 160 Equity securities 3,500 141 5,751 4,905 43 7,350 Corporate debt securities — 81 728 39 6 829 Municipal bonds — 32 334 14 1 314 U.S. government bonds 2 89 1,462 31 12 1,568 Other debt securities — 14 170 3 1 180 Total NDTF Investments $ 3,502 $ 357 $ 8,579 $ 4,992 $ 63 $ 10,401 Other Investments Cash and cash equivalents $ — $ — $ 51 $ — $ — $ 36 Equity securities 20 17 124 36 — 156 Corporate debt securities — 13 108 2 1 119 Municipal bonds — 3 82 3 1 80 U.S. government bonds — 5 49 — — 56 Other debt securities — 2 35 — 1 45 Total Other Investments $ 20 $ 40 $ 449 $ 41 $ 3 $ 492 Total Investments $ 3,522 $ 397 $ 9,028 $ 5,033 $ 66 $ 10,893
Schedule of Realized Gain (Loss)	Realized gains and losses, which were determined on a specific identification basis, from sales of FV-NI and AFS securities for the three and six months ended June 30, 2022, and 2021, were as follows. Three Months Ended Six Months Ended (in millions) June 30, 2022 June 30, 2021 June 30, 2022 June 30, 2021 FV-NI: Realized gains $ 34 $ 146 $ 145 $ 286 Realized losses 101 37 186 60 AFS: Realized gains 11 16 15 34 Realized losses 42 18 65 31
Investments Classified by Contractual Maturity Date	The table below summarizes the maturity date for debt securities. June 30, 2022 Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Indiana Due in one year or less $ 137 $ 7 $ 118 $ 24 $ 94 $ 9 Due after one through five years 930 350 501 266 235 23 Due after five through 10 years 484 209 204 189 15 6 Due after 10 years 1,417 777 553 515 38 23 Total $ 2,968 $ 1,343 $ 1,376 $ 994 $ 382 $ 61
Duke Energy Carolinas
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Trading, and Equity Securities, FV-NI	The following table presents the estimated fair value of investments in debt and equity securities; equity investments are classified as FV-NI and debt investments are classified as AFS. June 30, 2022 December 31, 2021 Gross Gross Gross Gross Unrealized Unrealized Estimated Unrealized Unrealized Estimated Holding Holding Fair Holding Holding Fair (in millions) Gains Losses Value Gains Losses Value NDTF Cash and cash equivalents $ — $ — $ 58 $ — $ — $ 53 Equity securities 2,058 69 3,327 2,887 19 4,265 Corporate debt securities — 63 470 24 4 506 Municipal bonds — 9 63 2 — 48 U.S. government bonds 1 37 645 16 3 712 Other debt securities — 13 165 3 1 175 Total NDTF Investments $ 2,059 $ 191 $ 4,728 $ 2,932 $ 27 $ 5,759
Debt Securities, Available-for-sale	The following table presents the estimated fair value of investments in debt and equity securities; equity investments are classified as FV-NI and debt investments are classified as AFS. June 30, 2022 December 31, 2021 Gross Gross Gross Gross Unrealized Unrealized Estimated Unrealized Unrealized Estimated Holding Holding Fair Holding Holding Fair (in millions) Gains Losses Value Gains Losses Value NDTF Cash and cash equivalents $ — $ — $ 58 $ — $ — $ 53 Equity securities 2,058 69 3,327 2,887 19 4,265 Corporate debt securities — 63 470 24 4 506 Municipal bonds — 9 63 2 — 48 U.S. government bonds 1 37 645 16 3 712 Other debt securities — 13 165 3 1 175 Total NDTF Investments $ 2,059 $ 191 $ 4,728 $ 2,932 $ 27 $ 5,759
Schedule of Realized Gain (Loss)	Realized gains and losses, which were determined on a specific identification basis, from sales of FV-NI and AFS securities for the three and six months ended June 30, 2022, and 2021, were as follows. Three Months Ended Six Months Ended (in millions) June 30, 2022 June 30, 2021 June 30, 2022 June 30, 2021 FV-NI: Realized gains $ 18 $ 90 $ 93 $ 218 Realized losses 55 23 104 39 AFS: Realized gains 9 12 12 25 Realized losses 21 13 37 22
Progress Energy
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Trading, and Equity Securities, FV-NI	The following table presents the estimated fair value of investments in debt and equity securities; equity investments are classified as FV-NI and debt investments are classified as AFS. June 30, 2022 December 31, 2021 Gross Gross Gross Gross Unrealized Unrealized Estimated Unrealized Unrealized Estimated Holding Holding Fair Holding Holding Fair (in millions) Gains Losses Value Gains Losses Value NDTF Cash and cash equivalents $ — $ — $ 76 $ — $ — $ 107 Equity securities 1,442 72 2,424 2,018 24 3,085 Corporate debt securities — 18 258 15 2 323 Municipal bonds — 23 271 12 1 266 U.S. government bonds 1 52 817 15 9 856 Other debt securities — 1 5 — — 5 Total NDTF Investments $ 1,443 $ 166 $ 3,851 $ 2,060 $ 36 $ 4,642 Other Investments Cash and cash equivalents $ — $ — $ 15 $ — $ — $ 20 Municipal bonds — — 25 2 — 26 Total Other Investments $ — $ — $ 40 $ 2 $ — $ 46 Total Investments $ 1,443 $ 166 $ 3,891 $ 2,062 $ 36 $ 4,688
Debt Securities, Available-for-sale	The following table presents the estimated fair value of investments in debt and equity securities; equity investments are classified as FV-NI and debt investments are classified as AFS. June 30, 2022 December 31, 2021 Gross Gross Gross Gross Unrealized Unrealized Estimated Unrealized Unrealized Estimated Holding Holding Fair Holding Holding Fair (in millions) Gains Losses Value Gains Losses Value NDTF Cash and cash equivalents $ — $ — $ 76 $ — $ — $ 107 Equity securities 1,442 72 2,424 2,018 24 3,085 Corporate debt securities — 18 258 15 2 323 Municipal bonds — 23 271 12 1 266 U.S. government bonds 1 52 817 15 9 856 Other debt securities — 1 5 — — 5 Total NDTF Investments $ 1,443 $ 166 $ 3,851 $ 2,060 $ 36 $ 4,642 Other Investments Cash and cash equivalents $ — $ — $ 15 $ — $ — $ 20 Municipal bonds — — 25 2 — 26 Total Other Investments $ — $ — $ 40 $ 2 $ — $ 46 Total Investments $ 1,443 $ 166 $ 3,891 $ 2,062 $ 36 $ 4,688
Schedule of Realized Gain (Loss)	Realized gains and losses, which were determined on a specific identification basis, from sales of FV-NI and AFS securities for the three and six months ended June 30, 2022, and 2021, were as follows. Three Months Ended Six Months Ended (in millions) June 30, 2022 June 30, 2021 June 30, 2022 June 30, 2021 FV-NI: Realized gains $ 16 $ 56 $ 52 $ 68 Realized losses 46 14 82 21 AFS: Realized gains 2 3 3 7 Realized losses 17 3 23 6
Duke Energy Progress
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Trading, and Equity Securities, FV-NI	The following table presents the estimated fair value of investments in debt and equity securities; equity investments are classified as FV-NI and debt investments are classified as AFS. June 30, 2022 December 31, 2021 Gross Gross Gross Gross Unrealized Unrealized Estimated Unrealized Unrealized Estimated Holding Holding Fair Holding Holding Fair (in millions) Gains Losses Value Gains Losses Value NDTF Cash and cash equivalents $ — $ — $ 46 $ — $ — $ 94 Equity securities 1,363 72 2,333 1,915 23 2,970 Corporate debt securities — 17 241 15 2 282 Municipal bonds — 23 271 12 1 266 U.S. government bonds 1 31 477 15 3 472 Other debt securities — 1 5 — — 5 Total NDTF Investments $ 1,364 $ 144 $ 3,373 $ 1,957 $ 29 $ 4,089 Other Investments Cash and cash equivalents $ — $ — $ 12 $ — $ — $ 16 Total Other Investments $ — $ — $ 12 $ — $ — $ 16 Total Investments $ 1,364 $ 144 $ 3,385 $ 1,957 $ 29 $ 4,105
Debt Securities, Available-for-sale	The following table presents the estimated fair value of investments in debt and equity securities; equity investments are classified as FV-NI and debt investments are classified as AFS. June 30, 2022 December 31, 2021 Gross Gross Gross Gross Unrealized Unrealized Estimated Unrealized Unrealized Estimated Holding Holding Fair Holding Holding Fair (in millions) Gains Losses Value Gains Losses Value NDTF Cash and cash equivalents $ — $ — $ 46 $ — $ — $ 94 Equity securities 1,363 72 2,333 1,915 23 2,970 Corporate debt securities — 17 241 15 2 282 Municipal bonds — 23 271 12 1 266 U.S. government bonds 1 31 477 15 3 472 Other debt securities — 1 5 — — 5 Total NDTF Investments $ 1,364 $ 144 $ 3,373 $ 1,957 $ 29 $ 4,089 Other Investments Cash and cash equivalents $ — $ — $ 12 $ — $ — $ 16 Total Other Investments $ — $ — $ 12 $ — $ — $ 16 Total Investments $ 1,364 $ 144 $ 3,385 $ 1,957 $ 29 $ 4,105
Schedule of Realized Gain (Loss)	Realized gains and losses, which were determined on a specific identification basis, from sales of FV-NI and AFS securities for the three and six months ended June 30, 2022, and 2021, were as follows. Three Months Ended Six Months Ended (in millions) June 30, 2022 June 30, 2021 June 30, 2022 June 30, 2021 FV-NI: Realized gains $ 15 $ 55 $ 51 $ 67 Realized losses 45 13 80 20 AFS: Realized gains 2 3 3 7 Realized losses 15 3 20 6
Duke Energy Florida
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Trading, and Equity Securities, FV-NI	The following table presents the estimated fair value of investments in debt and equity securities; equity investments are classified as FV-NI and debt investments are classified as AFS. June 30, 2022 December 31, 2021 Gross Gross Gross Gross Unrealized Unrealized Estimated Unrealized Unrealized Estimated Holding Holding Fair Holding Holding Fair (in millions) Gains Losses Value Gains Losses Value NDTF Cash and cash equivalents $ — $ — $ 30 $ — $ — $ 13 Equity securities 79 — 91 103 1 115 Corporate debt securities — 1 17 — — 41 U.S. government bonds — 21 340 — 6 384 Total NDTF Investments (a) $ 79 $ 22 $ 478 $ 103 $ 7 $ 553 Other Investments Cash and cash equivalents $ — $ — $ 1 $ — $ — $ 3 Municipal bonds — — 25 2 — 26 Total Other Investments $ — $ — $ 26 $ 2 $ — $ 29 Total Investments $ 79 $ 22 $ 504 $ 105 $ 7 $ 582 (a) During the six months ended June 30, 2022, and the year ended December 31, 2021, Duke Energy Florida received reimbursements from the NDTF for costs related to ongoing decommissioning activity of Crystal River Unit 3.
Debt Securities, Available-for-sale	The following table presents the estimated fair value of investments in debt and equity securities; equity investments are classified as FV-NI and debt investments are classified as AFS. June 30, 2022 December 31, 2021 Gross Gross Gross Gross Unrealized Unrealized Estimated Unrealized Unrealized Estimated Holding Holding Fair Holding Holding Fair (in millions) Gains Losses Value Gains Losses Value NDTF Cash and cash equivalents $ — $ — $ 30 $ — $ — $ 13 Equity securities 79 — 91 103 1 115 Corporate debt securities — 1 17 — — 41 U.S. government bonds — 21 340 — 6 384 Total NDTF Investments (a) $ 79 $ 22 $ 478 $ 103 $ 7 $ 553 Other Investments Cash and cash equivalents $ — $ — $ 1 $ — $ — $ 3 Municipal bonds — — 25 2 — 26 Total Other Investments $ — $ — $ 26 $ 2 $ — $ 29 Total Investments $ 79 $ 22 $ 504 $ 105 $ 7 $ 582 (a) During the six months ended June 30, 2022, and the year ended December 31, 2021, Duke Energy Florida received reimbursements from the NDTF for costs related to ongoing decommissioning activity of Crystal River Unit 3.
Duke Energy Indiana
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Trading, and Equity Securities, FV-NI	The following table presents the estimated fair value of investments in debt and equity securities; equity investments are measured at FV-NI and debt investments are classified as AFS. June 30, 2022 December 31, 2021 Gross Gross Gross Gross Unrealized Unrealized Estimated Unrealized Unrealized Estimated Holding Holding Fair Holding Holding Fair (in millions) Gains Losses Value Gains Losses Value Investments Equity securities $ 2 $ 17 $ 77 $ 6 $ — $ 97 Corporate debt securities — — 8 — — 6 Municipal bonds — 3 48 1 1 46 U.S. government bonds — — 5 — — 12 Total Investments $ 2 $ 20 $ 138 $ 7 $ 1 $ 161
Debt Securities, Available-for-sale	The following table presents the estimated fair value of investments in debt and equity securities; equity investments are measured at FV-NI and debt investments are classified as AFS. June 30, 2022 December 31, 2021 Gross Gross Gross Gross Unrealized Unrealized Estimated Unrealized Unrealized Estimated Holding Holding Fair Holding Holding Fair (in millions) Gains Losses Value Gains Losses Value Investments Equity securities $ 2 $ 17 $ 77 $ 6 $ — $ 97 Corporate debt securities — — 8 — — 6 Municipal bonds — 3 48 1 1 46 U.S. government bonds — — 5 — — 12 Total Investments $ 2 $ 20 $ 138 $ 7 $ 1 $ 161

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	6 Months Ended
	Jun. 30, 2022
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value Measurement Amounts For Assets And Liabilities	The following tables provide recorded balances for assets and liabilities measured at fair value on a recurring basis on the Condensed Consolidated Balance Sheets. Derivative amounts in the tables below for all Duke Energy Registrants exclude cash collateral, which is disclosed in Note 8. See Note 9 for additional information related to investments by major security type for the Duke Energy Registrants. June 30, 2022 (in millions) Total Fair Value Level 1 Level 2 Level 3 Not Categorized NDTF cash and cash equivalents $ 134 $ 134 $ — $ — $ — NDTF equity securities 5,751 5,704 — — 47 NDTF debt securities 2,694 849 1,845 — — Other equity securities 124 124 — — — Other debt securities 274 44 230 — — Other cash and cash equivalents 51 51 — — — Derivative assets 1,336 2 1,245 89 — Total assets 10,364 6,908 3,320 89 47 Derivative liabilities (593) (21) (327) (245) — Net assets (liabilities) $ 9,771 $ 6,887 $ 2,993 $ (156) $ 47 December 31, 2021 (in millions) Total Fair Value Level 1 Level 2 Level 3 Not Categorized NDTF cash and cash equivalents $ 160 $ 160 $ — $ — $ — NDTF equity securities 7,350 7,300 — — 50 NDTF debt securities 2,891 967 1,924 — — Other equity securities 156 156 — — — Other debt securities 300 45 255 — — Other cash and cash equivalents 36 36 — — — Derivative assets 320 3 293 24 — Total assets 11,213 8,667 2,472 24 50 Derivative liabilities (472) (13) (314) (145) — Net assets (liabilities) $ 10,741 $ 8,654 $ 2,158 $ (121) $ 50
Reconciliation Of Assets And Liabilities Measured At Fair Value On A Recurring Basis Using Unobservable Inputs	The following tables provide reconciliations of beginning and ending balances of assets and liabilities measured at fair value using Level 3 measurements. Derivatives (net) Three Months Ended June 30, Six Months Ended June 30, (in millions) 2022 2021 2022 2021 Balance at beginning of period $ (199) $ (126) $ (121) $ (77) Total pretax realized or unrealized losses included in comprehensive income (42) (31) (110) (75) Purchases, sales, issuances and settlements: Purchases 77 21 77 21 Settlements 21 (1) 18 (8) Total (losses) gains included on the Condensed Consolidated Balance Sheet (13) 6 (20) 8 Balance at end of period $ (156) $ (131) $ (156) $ (131)
Quantitative Information Table - Level 3	The following tables include quantitative information about the Duke Energy Registrants' derivatives classified as Level 3. June 30, 2022 Weighted Fair Value Average Investment Type (in millions) Valuation Technique Unobservable Input Range Range Duke Energy Electricity contracts $ (245) RTO forward pricing Forward electricity curves – price per MWh $ 23.35 - $ 243.21 $ 53.28 Duke Energy Ohio FTRs 5 RTO auction pricing FTR price – per MWh (0.29) - 2.30 0.89 Duke Energy Indiana FTRs 84 RTO auction pricing FTR price – per MWh (0.61) - 24.34 3.69 Duke Energy Total Level 3 derivatives $ (156) December 31, 2021 Weighted Fair Value Average Investment Type (in millions) Valuation Technique Unobservable Input Range Range Duke Energy Electricity contracts $ (145) RTO forward pricing Forward electricity curves – price per MWh $ 19.04 - $139.11 $37.57 Duke Energy Ohio FTRs 2 RTO auction pricing FTR price – per MWh 0.06 - 1.79 0.96 Duke Energy Indiana FTRs 22 RTO auction pricing FTR price – per MWh (1.18) - 13.11 2.68 Duke Energy Total Level 3 derivatives $ (121)
Schedule Of Long Term Debt Fair Value	The fair value and book value of long-term debt, including current maturities, is summarized in the following table. Estimates determined are not necessarily indicative of amounts that could have been settled in current markets. Fair value of long-term debt uses Level 2 measurements. June 30, 2022 December 31, 2021 (in millions) Book Value Fair Value Book Value Fair Value Duke Energy (a) $ 66,318 $ 61,451 $ 63,835 $ 69,683 Duke Energy Carolinas 14,162 13,501 13,275 15,101 Progress Energy 20,751 19,830 20,823 23,751 Duke Energy Progress 10,662 9,829 10,249 11,252 Duke Energy Florida 8,447 8,150 8,482 9,772 Duke Energy Ohio 3,243 3,071 3,193 3,570 Duke Energy Indiana 4,337 4,168 4,323 5,067 Piedmont 3,363 3,086 2,968 3,278 (a) Book value of long-term debt inc ludes $1.21 billion and $1.25 billion
Duke Energy Carolinas
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value Measurement Amounts For Assets And Liabilities	The following tables provide recorded balances for assets and liabilities measured at fair value on a recurring basis on the Condensed Consolidated Balance Sheets. June 30, 2022 (in millions) Total Fair Value Level 1 Level 2 Not Categorized NDTF cash and cash equivalents $ 58 $ 58 $ — $ — NDTF equity securities 3,327 3,280 — 47 NDTF debt securities 1,343 304 1,039 — Derivative assets 484 — 484 — Total assets 5,212 3,642 1,523 47 Derivative liabilities (41) — (41) — Net assets $ 5,171 $ 3,642 $ 1,482 $ 47 December 31, 2021 (in millions) Total Fair Value Level 1 Level 2 Not Categorized NDTF cash and cash equivalents $ 53 $ 53 $ — $ — NDTF equity securities 4,265 4,215 — 50 NDTF debt securities 1,441 339 1,102 — Derivative assets 162 — 162 — Total assets 5,921 4,607 1,264 50 Derivative liabilities (35) — (35) — Net assets $ 5,886 $ 4,607 $ 1,229 $ 50
Progress Energy
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value Measurement Amounts For Assets And Liabilities	The following tables provide recorded balances for assets and liabilities measured at fair value on a recurring basis on the Condensed Consolidated Balance Sheets. June 30, 2022 December 31, 2021 (in millions) Total Fair Value Level 1 Level 2 Total Fair Value Level 1 Level 2 NDTF cash and cash equivalents $ 76 $ 76 $ — $ 107 $ 107 $ — NDTF equity securities 2,424 2,424 — 3,085 3,085 — NDTF debt securities 1,351 545 806 1,450 628 822 Other debt securities 25 — 25 26 — 26 Other cash and cash equivalents 15 15 — 20 20 — Derivative assets 368 — 368 124 — 124 Total assets 4,259 3,060 1,199 4,812 3,840 972 Derivative liabilities (43) — (43) (24) — (24) Net assets $ 4,216 $ 3,060 $ 1,156 $ 4,788 $ 3,840 $ 948
Duke Energy Progress
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value Measurement Amounts For Assets And Liabilities	The following tables provide recorded balances for assets and liabilities measured at fair value on a recurring basis on the Condensed Consolidated Balance Sheets. June 30, 2022 December 31, 2021 (in millions) Total Fair Value Level 1 Level 2 Total Fair Value Level 1 Level 2 NDTF cash and cash equivalents $ 46 $ 46 $ — $ 94 $ 94 $ — NDTF equity securities 2,333 2,333 — 2,970 2,970 — NDTF debt securities 994 253 741 1,025 289 736 Other cash and cash equivalents 12 12 — 16 16 — Derivative assets 368 — 368 124 — 124 Total assets 3,753 2,644 1,109 4,229 3,369 860 Derivative liabilities (11) — (11) (10) — (10) Net assets $ 3,742 $ 2,644 $ 1,098 $ 4,219 $ 3,369 $ 850
Duke Energy Florida
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value Measurement Amounts For Assets And Liabilities	The following tables provide recorded balances for assets and liabilities measured at fair value on a recurring basis on the Condensed Consolidated Balance Sheets. June 30, 2022 December 31, 2021 (in millions) Total Fair Value Level 1 Level 2 Total Fair Value Level 1 Level 2 NDTF cash and cash equivalents $ 30 $ 30 $ — $ 13 $ 13 $ — NDTF equity securities 91 91 — 115 115 — NDTF debt securities 357 292 65 425 339 86 Other debt securities 25 — 25 26 — 26 Other cash and cash equivalents 1 1 — 3 3 — Total assets 504 414 90 582 470 112 Derivative liabilities (33) — (33) (14) — (14) Net assets $ 471 $ 414 $ 57 $ 568 $ 470 $ 98
Duke Energy Indiana
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value Measurement Amounts For Assets And Liabilities	The following tables provide recorded balances for assets and liabilities measured at fair value on a recurring basis on the Condensed Consolidated Balance Sheets. June 30, 2022 December 31, 2021 (in millions) Total Fair Value Level 1 Level 2 Level 3 Total Fair Value Level 1 Level 2 Level 3 Other equity securities $ 77 $ 77 $ — $ — $ 97 $ 97 $ — $ — Other debt securities 61 — 61 — 64 — 64 — Derivative assets 141 2 55 84 23 1 — 22 Total assets 279 79 116 84 184 98 64 22 Derivative liabilities (21) (21) — — (27) (13) (14) — Net assets $ 258 $ 58 $ 116 $ 84 $ 157 $ 85 $ 50 $ 22
Reconciliation Of Assets And Liabilities Measured At Fair Value On A Recurring Basis Using Unobservable Inputs	The following table provides a reconciliation of beginning and ending balances of assets and liabilities measured at fair value using Level 3 measurements. Derivatives (net) Three Months Ended June 30, Six Months Ended June 30, (in millions) 2022 2021 2022 2021 Balance at beginning of period $ 10 $ 2 $ 22 $ 6 Purchases, sales, issuances and settlements: Purchases 74 18 74 18 Settlements 16 (3) 10 (9) Total (losses) gains included on the Condensed Consolidated Balance Sheet (16) 5 (22) 7 Balance at end of period $ 84 $ 22 $ 84 $ 22
Piedmont
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value Measurement Amounts For Assets And Liabilities	The following tables provide recorded balances for assets and liabilities measured at fair value on a recurring basis on the Condensed Consolidated Balance Sheets. June 30, 2022 December 31, 2021 (in millions) Total Fair Value Level 1 Level 2 Total Fair Value Level 1 Level 2 Derivative assets $ — $ — $ — $ 3 $ 3 $ — Derivative liabilities (193) — (193) (139) — (139) Net (liabilities) assets $ (193) $ — $ (193) $ (136) $ 3 $ (139)

Variable Interest Entities (Tab

Variable Interest Entities (Tables)	6 Months Ended
	Jun. 30, 2022
VIE primary beneficiary
Variable Interest Entities [Line Items]
Schedule Of Variable Interest Entities	The following table summarizes the amounts and expiration dates of the credit facilities and associated restricted receivables described above. Duke Energy Duke Energy Duke Energy Duke Energy Carolinas Progress Florida (in millions) CRC DERF DEPR DEFR Expiration date February 2025 January 2025 April 2025 April 2023 Credit facility amount $ 350 $ 500 $ 400 $ 250 Amounts borrowed at June 30, 2022 350 498 400 250 Amounts borrowed at December 31, 2021 350 475 350 250 Restricted Receivables at June 30, 2022 776 893 705 640 Restricted Receivables at December 31, 2021 587 844 574 427
VIE not primary beneficiary
Variable Interest Entities [Line Items]
Schedule Of Variable Interest Entities	The following tables summarize the impact of non-consolidated VIEs on the Condensed Consolidated Balance Sheets. June 30, 2022 Duke Energy Duke Duke Pipeline Commercial Energy Energy (in millions) Investments Renewables Total Ohio Indiana Receivables from affiliated companies $ — $ — $ — $ 131 $ 222 Investments in equity method unconsolidated affiliates 29 507 536 — — Deferred tax asset 62 — 62 — — Total assets $ 91 $ 507 $ 598 $ 131 $ 222 Other current liabilities 53 4 57 — — Other noncurrent liabilities 51 3 54 — — Total liabilities $ 104 $ 7 $ 111 $ — $ — Net (liabilities) assets $ (13) $ 500 $ 487 $ 131 $ 222 December 31, 2021 Duke Energy Duke Duke Pipeline Commercial Energy Energy (in millions) Investments Renewables Total Ohio Indiana Receivables from affiliated companies $ — $ — $ — $ 79 $ 97 Investments in equity method unconsolidated affiliates 15 508 523 — — Other noncurrent assets 61 — 61 — — Total assets $ 76 $ 508 $ 584 $ 79 $ 97 Other current liabilities 47 4 51 — — Other noncurrent liabilities 54 3 57 — — Total liabilities $ 101 $ 7 $ 108 $ — $ — Net (liabilities) assets $ (25) $ 501 $ 476 $ 79 $ 97
DEFPF | VIE primary beneficiary
Variable Interest Entities [Line Items]
Schedule Of Variable Interest Entities	The following table summarizes the impact of DEFPF on Duke Energy Florida's Condensed Consolidated Balance Sheets. (in millions) June 30, 2022 December 31, 2021 Receivables of VIEs $ 7 $ 5 Regulatory Assets: Current 54 54 Current Assets: Other 33 39 Other Noncurrent Assets: Regulatory assets 859 883 Current Liabilities: Other 9 9 Current maturities of long-term debt 56 56 Long-Term Debt 916 946
DECNCSF and DEPNCSF | VIE primary beneficiary
Variable Interest Entities [Line Items]
Schedule Of Variable Interest Entities	The following table summarizes the impact of these VIEs on Duke Energy Carolinas’ and Duke Energy Progress’ Consolidated Balance Sheets. June 30, 2022 December 31, 2021 Duke Energy Duke Energy Duke Energy Duke Energy (in millions) Carolinas Progress Carolinas Progress Regulatory Assets: Current $ 12 $ 39 $ 12 $ 39 Current Assets: Other 8 26 — — Other Noncurrent Assets: Regulatory assets 214 701 220 720 Other Noncurrent Assets: Other 1 4 1 4 Current Liabilities: Other 3 10 1 2 Current maturities of long-term debt 10 32 5 15 Long-Term Debt 224 731 228 747
Commercial Renewables | VIE primary beneficiary
Variable Interest Entities [Line Items]
Schedule Of Variable Interest Entities	The table below presents material balances reported on Duke Energy's Condensed Consolidated Balance Sheets related to Commercial Renewables VIEs. (in millions) June 30, 2022 December 31, 2021 Current Assets: Other $ 215 $ 215 Property, Plant and Equipment: Cost 7,552 7,339 Accumulated depreciation and amortization (1,646) (1,474) Other Noncurrent Assets: Other 75 62 Current maturities of long-term debt 285 167 Long-Term Debt 1,255 1,475 Other Noncurrent Liabilities: AROs 176 173 Other Noncurrent Liabilities: Other 213 319
CRC | VIE not primary beneficiary
Variable Interest Entities [Line Items]
Schedule Of Variable Interest Entities	The following table shows the gross and net receivables sold. Duke Energy Ohio Duke Energy Indiana (in millions) June 30, 2022 December 31, 2021 June 30, 2022 December 31, 2021 Receivables sold $ 313 $ 269 $ 466 $ 328 Less: Retained interests 131 79 222 97 Net receivables sold $ 182 $ 190 $ 244 $ 231 The following table shows sales and cash flows related to receivables sold. Duke Energy Ohio Duke Energy Indiana Six Months Ended Six Months Ended June 30, June 30, (in millions) 2022 2021 2022 2021 Sales Receivables sold $ 1,247 $ 1,004 $ 1,617 $ 1,382 Loss recognized on sale 7 5 8 6 Cash flows Cash proceeds from receivables sold $ 1,188 $ 1,029 $ 1,484 $ 1,401 Collection fees received 1 — 1 — Return received on retained interests 3 2 4 3

Revenue (Tables)

Revenue (Tables)	6 Months Ended
	Jun. 30, 2022
Revenue from Contract with Customer [Abstract]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction	Supplemental requirements contracts that include contracted blocks of energy and capacity at contractually fixed prices have the following estimated remaining performance obligations: Remaining Performance Obligations (in millions) 2022 2023 2024 2025 2026 Thereafter Total Progress Energy $ 54 $ 53 $ 45 $ 7 $ 7 $ 43 $ 209 Duke Energy Progress 4 8 8 — — — 20 Duke Energy Florida 50 45 37 7 7 43 189 Duke Energy Indiana 2 11 16 17 15 12 73 Remaining Performance Obligations (in millions) 2022 2023 2024 2025 2026 Thereafter Total Piedmont $ 32 $ 64 $ 61 $ 60 $ 50 $ 286 $ 553
Disaggregation of Revenue	Disaggregated revenues are presented as follows: Three Months Ended June 30, 2022 Duke Duke Duke Duke Duke (in millions) Duke Energy Progress Energy Energy Energy Energy By market or type of customer Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Electric Utilities and Infrastructure Residential $ 2,625 $ 736 $ 1,400 $ 530 $ 870 $ 196 $ 296 $ — General 1,817 566 889 370 519 111 251 — Industrial 824 296 274 184 90 33 220 — Wholesale 629 103 389 281 108 35 102 — Other revenues 202 92 247 210 37 20 23 — Total Electric Utilities and Infrastructure revenue from contracts with customers $ 6,097 $ 1,793 $ 3,199 $ 1,575 $ 1,624 $ 395 $ 892 $ — Gas Utilities and Infrastructure Residential $ 197 $ — $ — $ — $ — $ 94 $ — $ 103 Commercial 127 — — — — 38 — 90 Industrial 34 — — — — 6 — 28 Power Generation — — — — — — — 23 Other revenues 66 — — — — 6 — 44 Total Gas Utilities and Infrastructure revenue from contracts with customers $ 424 $ — $ — $ — $ — $ 144 $ — $ 288 Commercial Renewables Revenue from contracts with customers $ 77 $ — $ — $ — $ — $ — $ — $ — Other Revenue from contracts with customers $ 8 $ — $ — $ — $ — $ — $ — $ — Total revenue from contracts with customers $ 6,606 $ 1,793 $ 3,199 $ 1,575 $ 1,624 $ 539 $ 892 $ 288 Other revenue sources (a) $ 79 $ (12) $ 15 $ 6 $ 4 $ 6 $ 26 $ 22 Total revenues $ 6,685 $ 1,781 $ 3,214 $ 1,581 $ 1,628 $ 545 $ 918 $ 310 (a) Other revenue sources include revenues from leases, derivatives and alternative revenue programs that are not considered revenues from contracts with customers. Alternative revenue programs in certain jurisdictions include regulatory mechanisms that periodically adjust for over or under collection of related revenues. Three Months Ended June 30, 2021 Duke Duke Duke Duke Duke (in millions) Duke Energy Progress Energy Energy Energy Energy By market or type of customer Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Electric Utilities and Infrastructure Residential $ 2,336 $ 683 $ 1,216 $ 478 $ 738 $ 171 $ 265 $ — General 1,513 498 720 330 390 106 190 — Industrial 705 256 229 160 69 33 189 — Wholesale 521 116 331 285 46 13 63 — Other revenues 234 62 151 71 80 22 23 — Total Electric Utilities and Infrastructure revenue from contracts with customers $ 5,309 $ 1,615 $ 2,647 $ 1,324 $ 1,323 $ 345 $ 730 $ — Gas Utilities and Infrastructure Residential $ 158 $ — $ — $ — $ — $ 69 $ — $ 88 Commercial 91 — — — — 27 — 59 Industrial 30 — — — — 4 — 27 Power Generation — — — — — — — 24 Other revenues 20 — — — — 12 — (1) Total Gas Utilities and Infrastructure revenue from contracts with customers $ 299 $ — $ — $ — $ — $ 112 $ — $ 197 Commercial Renewables Revenue from contracts with customers $ 53 $ — $ — $ — $ — $ — $ — $ — Other Revenue from contracts with customers $ 6 $ — $ — $ — $ — $ — $ — $ — Total revenue from contracts with customers $ 5,667 $ 1,615 $ 2,647 $ 1,324 $ 1,323 $ 457 $ 730 $ 197 Other revenue sources (a) $ 91 $ (5) $ 32 $ 25 $ 2 $ (1) $ 5 $ 18 Total revenues $ 5,758 $ 1,610 $ 2,679 $ 1,349 $ 1,325 $ 456 $ 735 $ 215 (a) Other revenue sources include revenues from leases, derivatives and alternative revenue programs that are not considered revenues from contracts with customers. Alternative revenue programs in certain jurisdictions include regulatory mechanisms that periodically adjust for over or under collection of related revenues. Six Months Ended June 30, 2022 Duke Duke Duke Duke Duke (in millions) Duke Energy Progress Energy Energy Energy Energy By market or type of customer Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Electric Utilities and Infrastructure Residential $ 5,392 $ 1,567 $ 2,768 $ 1,154 $ 1,614 $ 407 $ 650 $ — General 3,421 1,110 1,615 695 920 227 469 — Industrial 1,596 572 544 378 166 68 412 — Wholesale 1,255 216 800 630 170 58 181 — Other revenues 404 203 458 349 109 41 (13) — Total Electric Utilities and Infrastructure revenue from contracts with customers $ 12,068 $ 3,668 $ 6,185 $ 3,206 $ 2,979 $ 801 $ 1,699 $ — Gas Utilities and Infrastructure Residential $ 769 $ — $ — $ — $ — $ 243 $ — $ 526 Commercial 396 — — — — 102 — 294 Industrial 91 — — — — 13 — 78 Power Generation — — — — — — — 47 Other revenues 181 — — — — 12 — 137 Total Gas Utilities and Infrastructure revenue from contracts with customers $ 1,437 $ — $ — $ — $ — $ 370 $ — $ 1,082 Commercial Renewables Revenue from contracts with customers $ 128 $ — $ — $ — $ — $ — $ — $ — Other Revenue from contracts with customers $ 15 $ — $ — $ — $ — $ — $ — $ — Total Revenue from contracts with customers $ 13,648 $ 3,668 $ 6,185 $ 3,206 $ 2,979 $ 1,171 $ 1,699 $ 1,082 Other revenue sources (a) $ 169 $ 1 $ 21 $ 7 $ 4 $ 12 $ 41 $ 33 Total revenues $ 13,817 $ 3,669 $ 6,206 $ 3,213 $ 2,983 $ 1,183 $ 1,740 $ 1,115 (a) Other revenue sources include revenues from leases, derivatives and alternative revenue programs that are not considered revenues from contracts with customers. Alternative revenue programs in certain jurisdictions include regulatory mechanisms that periodically adjust for over or under collection of related revenues. Six Months Ended June 30, 2021 Duke Duke Duke Duke Duke (in millions) Duke Energy Progress Energy Energy Energy Energy By market or type of customer Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Electric Utilities and Infrastructure Residential $ 4,798 $ 1,476 $ 2,378 $ 1,038 $ 1,340 $ 366 $ 578 $ — General 2,932 1,000 1,344 636 708 210 379 — Industrial 1,367 512 436 305 131 64 356 — Wholesale 1,025 230 657 577 80 26 113 — Other revenues 460 136 311 154 157 44 41 — Total Electric Utilities and Infrastructure revenue from contracts with customers $ 10,582 $ 3,354 $ 5,126 $ 2,710 $ 2,416 $ 710 $ 1,467 $ — Gas Utilities and Infrastructure Residential $ 618 $ — $ — $ — $ — $ 179 $ — $ 439 Commercial 295 — — — — 75 — 215 Industrial 80 — — — — 11 — 70 Power Generation — — — — — — — 46 Other revenues 67 — — — — 17 — 25 Total Gas Utilities and Infrastructure revenue from contracts with customers $ 1,060 $ — $ — $ — $ — $ 282 $ — $ 795 Commercial Renewables Revenue from contracts with customers $ 107 $ — $ — $ — $ — $ — $ — $ — Other Revenue from contracts with customers $ 12 $ — $ — $ — $ — $ — $ — $ — Total Revenue from contracts with customers $ 11,761 $ 3,354 $ 5,126 $ 2,710 $ 2,416 $ 992 $ 1,467 $ 795 Other revenue sources (a) $ 147 $ (28) $ 58 $ 40 $ 10 $ (4) $ 13 $ 26 Total revenues $ 11,908 $ 3,326 $ 5,184 $ 2,750 $ 2,426 $ 988 $ 1,480 $ 821 (a) Other revenue sources include revenues from leases, derivatives and alternative revenue programs that are not considered revenues from contracts with customers. Alternative revenue programs in certain jurisdictions include regulatory mechanisms that periodically adjust for over or under collection of related revenues.
Reserve for Credit Losses for Trade and Other Receivables	The following table presents the reserve for credit losses for trade and other receivables based on adoption of the new standard. Three Months Ended June 30, 2021 and 2022 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Balance at March 31, 2021 $ 147 $ 34 $ 37 $ 23 $ 15 $ 4 $ 3 $ 14 Write-Offs (5) 1 (4) (3) (1) — — (2) Credit Loss Expense 12 6 6 4 2 — — 1 Other Adjustments (31) 1 (3) (3) — — — — Balance at June 30, 2021 $ 123 $ 42 $ 36 $ 21 $ 16 $ 4 $ 3 $ 13 Balance at March 31, 2022 $ 140 $ 52 $ 51 $ 31 $ 21 $ 4 $ 3 $ 17 Write-Offs (31) (16) (9) (5) (5) — — (5) Credit Loss Expense 20 8 7 2 5 — — 3 Other Adjustments 7 8 3 3 — — — — Balance at June 30, 2022 $ 136 $ 52 $ 52 $ 31 $ 21 $ 4 $ 3 $ 15 Six Months Ended June 30, 2021 and 2022 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Balance at December 31, 2020 $ 146 $ 23 $ 37 $ 23 $ 14 $ 4 $ 3 $ 12 Write-Offs (26) (7) (14) (8) (6) — — (3) Credit Loss Expense 29 16 13 6 7 — — 4 Other Adjustments (26) 10 — — 1 — — — Balance at June 30, 2021 $ 123 $ 42 $ 36 $ 21 $ 16 $ 4 $ 3 $ 13 Balance at December 31, 2021 $ 122 $ 42 $ 36 $ 21 $ 16 $ 4 $ 3 $ 15 Write-Offs (54) (25) (19) (7) (13) — — (6) Credit Loss Expense 44 13 19 6 13 — — 6 Other Adjustments 24 22 16 11 5 — — — Balance at June 30, 2022 $ 136 $ 52 $ 52 $ 31 $ 21 $ 4 $ 3 $ 15
Aging of Trade Receivables	The aging of trade receivables is presented in the table below. Duke Energy considers receivables greater than 30 days outstanding past due. June 30, 2022 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Unbilled Revenue (a)(b) $ 1,175 $ 412 $ 359 $ 205 $ 154 $ 8 $ 24 $ 10 0-30 days 2,202 592 946 451 492 32 41 127 30-60 days 177 52 90 41 49 2 3 8 60-90 days 88 16 44 20 24 1 6 5 90+ days 274 80 96 46 50 43 14 11 Deferred Payment Arrangements (c) 148 62 61 36 25 1 — 4 Trade and Other Receivables $ 4,064 $ 1,214 $ 1,596 $ 799 $ 794 $ 87 $ 88 $ 165 December 31, 2021 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Unbilled Revenue (a)(b) $ 964 $ 316 $ 266 $ 193 $ 73 $ 4 $ 27 $ 106 0-30 days 2,104 595 800 405 393 42 51 202 30-60 days 212 77 72 44 28 4 13 12 60-90 days 88 37 41 21 20 1 1 2 90+ days 249 106 65 37 28 47 11 7 Deferred Payment Arrangements (c) 115 55 45 22 23 2 — 4 Trade and Other Receivables $ 3,732 $ 1,186 $ 1,289 $ 722 $ 565 $ 100 $ 103 $ 333 (a) Unbilled revenues are recognized by applying customer billing rates to the estimated volumes of energy or natural gas delivered but not yet billed and are included within Receivables and Receivables of VIEs on the Condensed Consolidated Balance Sheets. (b) Duke Energy Ohio and Duke Energy Indiana sell, on a revolving basis, nearly all of their retail accounts receivable, including receivables for unbilled revenues, to an affiliate, CRC, and account for the transfers of receivables as sales. Accordingly, the receivables sold are not reflected on the Condensed Consolidated Balance Sheets of Duke Energy Ohio and Duke Energy Indiana. See Note 11 for further information. These receivables for unbilled revenues are $102 million and $199 million for Duke Energy Ohio and Duke Energy Indiana, respectively, as of June 30, 2022, and $82 million and $121 million for Duke Energy Ohio and Duke Energy Indiana, respectively, as of December 31, 2021. (c) Due to certain customer financial hardships created by the COVID-19 pandemic and resulting stay-at-home orders, Duke Energy permitted customers to defer payment of past-due amounts through an installment payment plan over a period of several months.

Stockholders' Equity (Tables)

Stockholders' Equity (Tables)	6 Months Ended
	Jun. 30, 2022
Equity [Abstract]
Schedule Of Earnings Per Share	The following table presents Duke Energy’s basic and diluted EPS calculations, the weighted average number of common shares outstanding and common and preferred share dividends declared. Three Months Ended June 30, Six Months Ended June 30, (in millions, except per share amounts) 2022 2021 2022 2021 Net income available to Duke Energy common stockholders $ 893 $ 751 $ 1,711 $ 1,704 Accumulated preferred stock dividends adjustment (12) (12) — — Less: Impact of participating securities — 1 1 1 Income from continuing operations available to Duke Energy common stockholders $ 881 $ 738 $ 1,710 $ 1,703 Weighted average common shares outstanding – basic and diluted 770 769 770 769 EPS available to Duke Energy common stockholders Basic and diluted $ 1.14 $ 0.96 $ 2.22 $ 2.21 Potentially dilutive items excluded from the calculation (a) 2 2 2 2 Dividends declared per common share $ 0.985 $ 0.965 $ 1.970 $ 1.930 Dividends declared on Series A preferred stock per depositary share (b) $ 0.359 $ 0.359 $ 0.719 $ 0.719 Dividends declared on Series B preferred stock per share (c) $ — $ — $ 24.375 $ 24.375 (a) Performance stock awards were not included in the dilutive securities calculation because the performance measures related to the awards had not been met. (b) 5.75% Series A Cumulative Redeemable Perpetual Preferred Stock dividends are payable quarterly in arrears on the 16th day of March, June, September and December. The preferred stock has a $25 liquidation preference per depositary share. (c) 4.875% Series B Fixed-Rate Reset Cumulative Redeemable Perpetual Preferred Stock dividends are payable semiannually in arrears on the 16th day of March and September. The preferred stock has a $1,000 liquidation preference per share.

Employee Benefit Plans (Tables)

Employee Benefit Plans (Tables)	6 Months Ended
	Jun. 30, 2022
Qualified Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Components of Net Periodic Pension Costs	The following tables include the components of net periodic pension costs for qualified pension plans. Three Months Ended June 30, 2022 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Service cost $ 41 $ 14 $ 11 $ 7 $ 6 $ 1 $ 2 $ 2 Interest cost on projected benefit obligation 59 13 18 8 10 3 5 2 Expected return on plan assets (141) (38) (47) (22) (24) (6) (10) (6) Amortization of actuarial loss 23 5 7 4 3 1 3 1 Amortization of prior service credit (4) (1) — — — — (1) (2) Amortization of settlement charges 2 2 — 1 — — — — Net periodic pension costs $ (20) $ (5) $ (11) $ (2) $ (5) $ (1) $ (1) $ (3) Three Months Ended June 30, 2021 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Service cost $ 44 $ 14 $ 12 $ 8 $ 6 $ 1 $ 3 $ 2 Interest cost on projected benefit obligation 55 12 18 8 9 4 4 2 Expected return on plan assets (140) (35) (47) (21) (25) (7) (10) (5) Amortization of actuarial loss 34 8 9 4 5 1 4 3 Amortization of prior service credit (8) (2) — (1) — — (1) (4) Amortization of settlement charges 2 2 — 1 — — — — Net periodic pension costs $ (13) $ (1) $ (8) $ (1) $ (5) $ (1) $ — $ (2) Six Months Ended June 30, 2022 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Service cost $ 81 $ 26 $ 23 $ 14 $ 10 $ 2 $ 4 $ 3 Interest cost on projected benefit obligation 117 27 36 16 20 6 10 4 Expected return on plan assets (281) (76) (93) (44) (48) (11) (19) (12) Amortization of actuarial loss 47 10 13 7 6 2 5 3 Amortization of prior service credit (9) (2) — — — — (1) (4) Amortization of settlement charges 4 3 1 1 — — — — Net periodic pension costs $ (41) $ (12) $ (20) $ (6) $ (12) $ (1) $ (1) $ (6) Six Months Ended June 30, 2021 Duke Duke Duke Duke Duke Duke Energy Progress Energy Energy Energy Energy (in millions) Energy Carolinas Energy Progress Florida Ohio Indiana Piedmont Service cost $ 88 $ 28 $ 25 $ 15 $ 11 $ 2 $ 5 $ 3 Interest cost on projected benefit obligation 110 25 35 15 19 7 9 4 Expected return on plan assets (279) (70) (94) (42) (51) (14) (20) (10) Amortization of actuarial loss 67 15 19 9 10 3 7 5 Amortization of prior service credit (15) (4) (1) (1) — — (1) (5) Amortization of settlement charges 4 3 1 1 — — — — Net periodic pension costs $ (25) $ (3) $ (15) $ (3) $ (11) $ (2) $ — $ (3)

Income Taxes (Tables)

Income Taxes (Tables)	6 Months Ended
	Jun. 30, 2022
Income Tax Disclosure [Abstract]
Summary of Effective Tax Rates	The ETRs from continuing operations for each of the Duke Energy Registrants are included in the following table. Three Months Ended Six Months Ended June 30, June 30, 2022 2021 2022 2021 Duke Energy 8.0 % 4.9 % 3.6 % 6.8 % Duke Energy Carolinas 7.3 % 0.4 % 7.4 % 4.3 % Progress Energy 16.8 % 8.3 % 16.4 % 10.2 % Duke Energy Progress 13.8 % 2.7 % 13.9 % 5.6 % Duke Energy Florida 20.2 % 19.0 % 20.1 % 19.1 % Duke Energy Ohio 13.8 % 22.0 % (54.7) % 16.1 % Duke Energy Indiana 8.6 % 15.6 % (48.9) % 16.7 % Piedmont 85.7 % 33.3 % 11.4 % 10.8 %

Organization and Basis of Pre_4

Organization and Basis of Presentation (Schedule of Allocated Losses from Subsidiaries, Noncontrolling Interest) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Allocated losses to noncontrolling tax equity members utilizing the HLBV method	$ 44	$ 55	$ 68	$ 98
Allocated (income) losses to noncontrolling members based on pro rata shares of ownership	(17)	12	(4)	20
Total Noncontrolling Interest Allocated Losses	$ 27	$ 67	$ 64	$ 118

Organization and Basis of Pre_5

Organization and Basis of Presentation (Schedule of Cash and Cash Equivalents) (Details) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021	Jun. 30, 2021	Dec. 31, 2020
Current Assets
Cash and cash equivalents	$ 428	$ 343
Other	193	170
Other Noncurrent Assets
Other	18	7
Total cash, cash equivalents and restricted cash	639	520	$ 565	$ 556
Duke Energy Carolinas
Current Assets
Cash and cash equivalents	37	7
Other	9
Other Noncurrent Assets
Other	1	1
Total cash, cash equivalents and restricted cash	47	8	36	21
Progress Energy
Current Assets
Cash and cash equivalents	129	70
Other	59	39
Other Noncurrent Assets
Other	4	4
Total cash, cash equivalents and restricted cash	192	113	108	200
Duke Energy Progress
Current Assets
Cash and cash equivalents	75	35
Other	26
Other Noncurrent Assets
Other	4	4
Total cash, cash equivalents and restricted cash	105	39	46	39
Duke Energy Florida
Current Assets
Cash and cash equivalents	44	23
Other	33	39
Other Noncurrent Assets
Total cash, cash equivalents and restricted cash	$ 77	$ 62	$ 55	$ 50

Organization and Basis of Pre_6

Organization and Basis of Presentation (Schedule of Inventory) (Details) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Public Utilities, Inventory [Line Items]
Inventory	$ 3,208	$ 3,199
Materials and supplies
Public Utilities, Inventory [Line Items]
Inventory	2,490	2,397
Coal
Public Utilities, Inventory [Line Items]
Inventory	446	486
Natural gas, oil and other fuel
Public Utilities, Inventory [Line Items]
Inventory	272	316
Duke Energy Carolinas
Public Utilities, Inventory [Line Items]
Inventory	1,033	1,026
Duke Energy Carolinas | Materials and supplies
Public Utilities, Inventory [Line Items]
Inventory	817	793
Duke Energy Carolinas | Coal
Public Utilities, Inventory [Line Items]
Inventory	182	195
Duke Energy Carolinas | Natural gas, oil and other fuel
Public Utilities, Inventory [Line Items]
Inventory	34	38
Progress Energy
Public Utilities, Inventory [Line Items]
Inventory	1,426	1,398
Progress Energy | Materials and supplies
Public Utilities, Inventory [Line Items]
Inventory	1,124	1,067
Progress Energy | Coal
Public Utilities, Inventory [Line Items]
Inventory	132	167
Progress Energy | Natural gas, oil and other fuel
Public Utilities, Inventory [Line Items]
Inventory	170	164
Duke Energy Progress
Public Utilities, Inventory [Line Items]
Inventory	948	921
Duke Energy Progress | Materials and supplies
Public Utilities, Inventory [Line Items]
Inventory	769	729
Duke Energy Progress | Coal
Public Utilities, Inventory [Line Items]
Inventory	79	94
Duke Energy Progress | Natural gas, oil and other fuel
Public Utilities, Inventory [Line Items]
Inventory	100	98
Duke Energy Florida
Public Utilities, Inventory [Line Items]
Inventory	478	477
Duke Energy Florida | Materials and supplies
Public Utilities, Inventory [Line Items]
Inventory	355	338
Duke Energy Florida | Coal
Public Utilities, Inventory [Line Items]
Inventory	53	73
Duke Energy Florida | Natural gas, oil and other fuel
Public Utilities, Inventory [Line Items]
Inventory	70	66
Duke Energy Ohio
Public Utilities, Inventory [Line Items]
Inventory	112	116
Duke Energy Ohio | Materials and supplies
Public Utilities, Inventory [Line Items]
Inventory	88	80
Duke Energy Ohio | Coal
Public Utilities, Inventory [Line Items]
Inventory	14	19
Duke Energy Ohio | Natural gas, oil and other fuel
Public Utilities, Inventory [Line Items]
Inventory	10	17
Duke Energy Indiana
Public Utilities, Inventory [Line Items]
Inventory	441	418
Duke Energy Indiana | Materials and supplies
Public Utilities, Inventory [Line Items]
Inventory	321	311
Duke Energy Indiana | Coal
Public Utilities, Inventory [Line Items]
Inventory	117	105
Duke Energy Indiana | Natural gas, oil and other fuel
Public Utilities, Inventory [Line Items]
Inventory	3	2
Piedmont
Public Utilities, Inventory [Line Items]
Inventory	68	109
Piedmont | Materials and supplies
Public Utilities, Inventory [Line Items]
Inventory	13	14
Piedmont | Natural gas, oil and other fuel
Public Utilities, Inventory [Line Items]
Inventory	$ 55	$ 95

Organization and Basis of Pre_7

Organization and Basis of Presentation (Other Noncurrent Assets) (Details) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Regulatory Asset [Line Items]
Other Noncurrent Assets: Other	$ 4,026	$ 3,812
Offshore Wind Arrangement
Regulatory Asset [Line Items]
Other Noncurrent Assets: Other	$ 150

Business Segments (Narrative) (

Business Segments (Narrative) (Details) $ in Millions			6 Months Ended
	Sep. 08, 2021 USD ($)	Jan. 28, 2021 USD ($) closing	Jun. 30, 2022 USD ($) segment	Jan. 01, 2023
Duke Energy Indiana | Noncontrolling Interests
Segment Reporting Information [Line Items]
Percentage sold		19.90%
Number of closings | closing		2
Value of sale of parent interest	$ 1,025	$ 2,000
Ownership interest sold	11.05%
Proceed of purchase price for exchange in interest	50%
Duke Energy Indiana | Noncontrolling Interests | Forecast
Segment Reporting Information [Line Items]
Percentage sold				19.90%
Proceed of purchase price for exchange in interest				50%
Duke Energy Ohio
Segment Reporting Information [Line Items]
Number of reportable segments | segment			2
Wind and solar | Nonregulated
Segment Reporting Information [Line Items]
Renewable merchant plants			$ 195
Joint owner ownership percentage			51%

Business Segments (Business Seg

Business Segments (Business Segment Data) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Segment Reporting Information [Line Items]
Operating Revenues	$ 6,685	$ 5,758	$ 13,817	$ 11,908
Segment income (loss)	893	751	1,711	1,704
Less: Noncontrolling interests	27	67	64	118
Add: Preferred stock dividend	14	14	53	53
Net Income	880	698	1,700	1,639
Segment assets	172,383		172,383		$ 169,587
Impairment of assets and other charges	(9)	131	206	131
Unregulated operating revenue	(186)	(198)	(383)	(380)
Incurred costs	1,447	1,410	3,077	2,812
Equity in earnings (losses) of unconsolidated affiliates	36	9	61	(8)
Income before taxes	(957)	(734)	(1,763)	(1,759)
Impairment charges
Segment Reporting Information [Line Items]
Impairment of assets and other charges	131		211	131
Operations, maintenance and other
Segment Reporting Information [Line Items]
Impairment of assets and other charges	27		27
Depreciation and amortization
Segment Reporting Information [Line Items]
Impairment of assets and other charges	17		17
Regulated Electric Revenues
Segment Reporting Information [Line Items]
Impairment of assets and other charges			46
Duke Energy Carolinas
Segment Reporting Information [Line Items]
Operating Revenues	1,781	1,610	3,669	3,326
Segment assets	47,774		47,774		47,162
Impairment of assets and other charges	(12)	75	(9)	75
Incurred costs	462	435	974	876
Income before taxes	(354)	(226)	(721)	(561)
Duke Energy Ohio
Segment Reporting Information [Line Items]
Operating Revenues	545	456	1,183	988
Segment income (loss)	56	39	133	130
Segment assets	11,015		11,015		10,774
Impairment of assets and other charges		5		5
Incurred costs	109	111	287	219
Income before taxes	(65)	(50)	(86)	(155)
Duke Energy Progress
Segment Reporting Information [Line Items]
Operating Revenues	1,581	1,349	3,213	2,750
Segment assets	35,336		35,336		$ 35,383
Impairment of assets and other charges	4	18	4	18
Incurred costs	360	367	751	724
Income before taxes	(254)	(221)	(504)	(450)
Electric Utilities and Infrastructure
Segment Reporting Information [Line Items]
Operating Revenues	6,126	5,328	12,121	10,601
Gas Utilities and Infrastructure
Segment Reporting Information [Line Items]
Operating Revenues	430	305	1,439	1,057
Gas Utilities and Infrastructure | Asset Impairment for Regulatory Action
Segment Reporting Information [Line Items]
Equity in earnings (losses) of unconsolidated affiliates		(16)
Commercial Renewables
Segment Reporting Information [Line Items]
Operating Revenues	121	119	242	238
Total Reportable Segments
Segment Reporting Information [Line Items]
Operating Revenues	6,677	5,752	13,802	11,896
Operating Segments | Electric Utilities and Infrastructure
Segment Reporting Information [Line Items]
Operating Revenues	6,135	5,335	12,137	10,616
Segment income (loss)	974	935	1,697	1,755
Segment assets	145,874		145,874
Operating Segments | Electric Utilities and Infrastructure | Duke Energy Supreme Court Ruling
Segment Reporting Information [Line Items]
Less: Noncontrolling interests	(2)		(20)
Operating Segments | Electric Utilities and Infrastructure | Duke Energy Ohio
Segment Reporting Information [Line Items]
Operating Revenues	401	343	813	706
Segment income (loss)	37	24	78	74
Segment assets	7,237		7,237
Operating Segments | Gas Utilities and Infrastructure
Segment Reporting Information [Line Items]
Operating Revenues	453	327	1,485	1,102
Segment income (loss)	19	17	273	262
Segment assets	15,420		15,420
Equity in earnings (losses) of unconsolidated affiliates				22
Operating Segments | Gas Utilities and Infrastructure | Duke Energy Ohio
Segment Reporting Information [Line Items]
Operating Revenues	144	113	370	282
Segment income (loss)	19	23	57	66
Segment assets	3,899		3,899
Operating Segments | Commercial Renewables
Segment Reporting Information [Line Items]
Operating Revenues	121	119	242	238
Segment income (loss)	30	47	41	74
Segment assets	7,276		7,276
Operating Segments | Commercial Renewables | Texas Storm Uri
Segment Reporting Information [Line Items]
Less: Noncontrolling interests			12
Unregulated operating revenue			(8)
Incurred costs			2
Equity in earnings (losses) of unconsolidated affiliates			29
Income before taxes			35
Operating Segments | Total Reportable Segments
Segment Reporting Information [Line Items]
Operating Revenues	6,709	5,781	13,864	11,956
Segment income (loss)	1,023	999	2,011	2,091
Segment assets	168,570		168,570
Operating Segments | Total Reportable Segments | Duke Energy Ohio
Segment Reporting Information [Line Items]
Operating Revenues	545	456	1,183	988
Segment income (loss)	56	47	135	140
Segment assets	11,136		11,136
Operating Segments | Nonregulated Segment
Segment Reporting Information [Line Items]
Segment income (loss)			21
Loss on derivative instruments	21
Other
Segment Reporting Information [Line Items]
Segment assets	3,821		3,821
Other | Other | Duke Energy Ohio
Segment Reporting Information [Line Items]
Segment income (loss)		(8)	(2)	(10)
Segment assets	14		14
Corporate And Eliminations
Segment Reporting Information [Line Items]
Operating Revenues	30	27	60	53
Segment income (loss)	(130)	(248)	(300)	(387)
Eliminations
Segment Reporting Information [Line Items]
Operating Revenues	(54)	(50)	(107)	(101)
Segment assets	(8)		(8)
Eliminations | Duke Energy Ohio
Segment Reporting Information [Line Items]
Segment assets	(135)		(135)
Eliminations | Electric Utilities and Infrastructure
Segment Reporting Information [Line Items]
Operating Revenues	9	7	16	15
Eliminations | Gas Utilities and Infrastructure
Segment Reporting Information [Line Items]
Operating Revenues	23	22	46	45
Eliminations | Total Reportable Segments
Segment Reporting Information [Line Items]
Operating Revenues	32	29	62	60
Eliminations | Other
Segment Reporting Information [Line Items]
Operating Revenues	22	21	45	41
Other
Segment Reporting Information [Line Items]
Operating Revenues	$ 8	$ 6	$ 15	$ 12

Regulatory Matters (Regulatory

Regulatory Matters (Regulatory Matters Narrative - Duke Energy Carolinas) (Details) - Nuclear Regulatory Commission - contention					6 Months Ended
	Sep. 27, 2021	Jul. 28, 2021	Jun. 07, 2021	Jun. 06, 2021	Jun. 30, 2022
Public Utilities, General Disclosures [Line Items]
Operating license extension (in years)					20 years
Duke Energy Carolinas | Oconee Nuclear Station Subsequent License Renewal
Public Utilities, General Disclosures [Line Items]
Comment period (in days)		60 days
Number of contentions	3
Duke Energy Carolinas | Oconee Nuclear Station Subsequent License Renewal | Oconee Nuclear Station
Public Utilities, General Disclosures [Line Items]
Operating license extension (in years)			20 years
Operating license (in years)			80 years	60 years

Regulatory Matters (Regulator_2

Regulatory Matters (Regulatory Matters Narrative - Duke Energy Progress) (Details)	Jun. 16, 2022	Oct. 16, 2020
Duke Energy Progress | FERC | FERC Return on Equity Complaint, NCEMC
Public Utilities, General Disclosures [Line Items]
Approved return on equity percentage (as a percent)	10%	11%

Regulatory Matters (Regulator_3

Regulatory Matters (Regulatory Matters Narrative - Duke Energy Florida) (Details) - Duke Energy Florida				6 Months Ended	12 Months Ended
	Jun. 15, 2022 USD ($)	May 04, 2021 USD ($)	Jul. 01, 2020 USD ($) plant MW	Jun. 30, 2022 USD ($)	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Apr. 11, 2022 USD ($)
Solar Project
Public Utilities, General Disclosures [Line Items]
Estimated cost of facilities			$ 1,000,000,000
Estimated cost of facilities period (in years)			3 years
FPSC
Public Utilities, General Disclosures [Line Items]
Number of solar plants | plant			10
Generation capacity (MW) | MW			750
2021 Settlement | FPSC
Public Utilities, General Disclosures [Line Items]
Approved rate increase, amount				$ 67,000,000
Public utilities, approved equity capital structure, percentage		53%
Public utilities, approved debt capital structure, percentage		47%
Public utilities, basis points, increase, percentage		0.25%
Contract with customer, asset, after allowance for credit loss, noncurrent	$ 154,000,000	$ 173,000,000
Proceeds from legal settlements	$ 180,000,000
Future investment in infrastructure		$ 1,000,000,000
2021 Settlement | FPSC | Forecast
Public Utilities, General Disclosures [Line Items]
Approved rate increase, amount					$ 79,000,000	$ 49,000,000
2021 Settlement | FPSC | US Treasury Securities
Public Utilities, General Disclosures [Line Items]
Public utilities, basis points, increase, percentage		0.50%
2021 Settlement | FPSC | Minimum
Public Utilities, General Disclosures [Line Items]
Approved return on equity percentage (as a percent)		8.85%
2021 Settlement | FPSC | Minimum | US Treasury Securities
Public Utilities, General Disclosures [Line Items]
Approved return on equity percentage (as a percent)		9.85%
2021 Settlement | FPSC | Maximum
Public Utilities, General Disclosures [Line Items]
Approved return on equity percentage (as a percent)		10.85%
2021 Settlement | FPSC | Maximum | US Treasury Securities
Public Utilities, General Disclosures [Line Items]
Approved return on equity percentage (as a percent)		10.10%
2021 Settlement | FPSC | Weighted Average
Public Utilities, General Disclosures [Line Items]
Approved return on equity percentage (as a percent)		9.85%
Storm Protection Plan | FPSC
Public Utilities, General Disclosures [Line Items]
Investment in transmission and distribution							$ 7,000,000,000

Regulatory Matters (Regulator_4

Regulatory Matters (Regulatory Matters Narrative - Duke Energy Ohio) (Details) $ in Millions			3 Months Ended			6 Months Ended
	May 19, 2022 USD ($)	Oct. 01, 2021 USD ($)	Jun. 30, 2022 USD ($)	Mar. 31, 2022 USD ($)	Jun. 30, 2021 USD ($)	Jun. 30, 2022 USD ($) site	Jun. 30, 2021 USD ($)	Apr. 27, 2022 USD ($)	Dec. 31, 2021 USD ($)
Public Utilities, General Disclosures [Line Items]
Operating Revenues			$ 6,685		$ 5,758	$ 13,817	$ 11,908
Incurred costs			1,447		1,410	3,077	2,812
Income Tax Expense			77		36	63	120
Impairment of assets and other charges			(9)		131	206	131
Net property, plant and equipment			113,851			113,851			$ 111,408
Duke Energy Ohio
Public Utilities, General Disclosures [Line Items]
Operating Revenues			545		456	1,183	988
Incurred costs			109		111	287	219
Income Tax Expense			9		11	(47)	25
Impairment of assets and other charges					$ 5		$ 5
Net property, plant and equipment			8,866			8,866			$ 8,625
Duke Energy Ohio | Duke Energy Ohio Electric Base Rate Case | PUCO
Public Utilities, General Disclosures [Line Items]
Requested rate increase (decrease), amount		$ 55
Requested return on equity, percent		10.30%
Requested rate increase, percentage		3.30%
Duke Energy Ohio | Duke Energy Ohio Electric Base Rate Case | PUCO | Minimum
Public Utilities, General Disclosures [Line Items]
Requested rate increase (decrease), amount	$ 2
Requested return on equity, percent	8.84%
Duke Energy Ohio | Duke Energy Ohio Electric Base Rate Case | PUCO | Maximum
Public Utilities, General Disclosures [Line Items]
Requested rate increase (decrease), amount	$ 15
Requested return on equity, percent	9.85%
Duke Energy Ohio | Natural Gas Pipeline extension | OPSB
Public Utilities, General Disclosures [Line Items]
Estimated capital cost excluding AFUDC			$ 185			$ 185
Duke Energy Ohio | MGP Cost Recovery - 2009 Through 2012 | PUCO
Public Utilities, General Disclosures [Line Items]
Number of environmental remediation sites | site						2
Duke Energy Ohio | MGP Cost Recovery - 2013 Through 2019 | PUCO
Public Utilities, General Disclosures [Line Items]
Operating Revenues						$ 15
Incurred costs						58
Income Tax Expense						(72)
Duke Energy Ohio | Midwest Propane Caverns
Public Utilities, General Disclosures [Line Items]
Impairment of assets and other charges				$ 19
Net property, plant and equipment								$ 7
Duke Energy Ohio | Duke Energy Ohio Gas Base Rate Case | PUCO
Public Utilities, General Disclosures [Line Items]
Requested rate increase (decrease), amount						$ 49
Requested return on equity, percent						10.30%
Requested rate increase, percentage						5.60%

Regulatory Matters (Regulator_5

Regulatory Matters (Regulatory Matters Narrative - Duke Energy Indiana) (Details) - USD ($)					3 Months Ended		6 Months Ended
	Jul. 28, 2021	Jun. 29, 2020	Dec. 04, 2019	Jul. 02, 2019	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Jun. 15, 2022	Dec. 31, 2020
Public Utilities, General Disclosures [Line Items]
Impairment of assets and other charges					$ (9,000,000)	$ 131,000,000	$ 206,000,000	$ 131,000,000
Operating Revenues					6,685,000,000	5,758,000,000	13,817,000,000	11,908,000,000
Duke Energy Indiana
Public Utilities, General Disclosures [Line Items]
Impairment of assets and other charges						8,000,000	211,000,000	8,000,000
Operating Revenues					$ 918,000,000	$ 735,000,000	1,740,000,000	$ 1,480,000,000
Duke Energy Indiana | IURC | Indiana rate case 2019
Public Utilities, General Disclosures [Line Items]
Requested rate increase (decrease), amount				$ 395,000,000
Requested rate increase, percentage, net of tax			15.60%
Requested rate increase (decrease), amended amount			$ 396,000,000
Approved rate increase, amount		$ 146,000,000
Rate base										$ 10,200,000,000
Reduction of requested rate increase		$ 200,000,000
Reduction due to depreciation methodology		50%
Reduction due to approved return on equity		20%
Approved return on equity percentage (as a percent)		9.70%
Requested return on equity, percent		10.40%
Reduction due to earnings adjustments		20%
Estimated percentage of total rate increase, step one		75%
Estimated percentage of total rate increase, step two	25%
Impairment of assets and other charges							211,000,000
Operating Revenues							$ 46,000,000
Duke Energy Indiana | IURC | TDSIG 2.0
Public Utilities, General Disclosures [Line Items]
Future investment in infrastructure									$ 2,000,000,000

Regulatory Matters (Regulator_6

Regulatory Matters (Regulatory Matters Narrative - Piedmont) (Details) - 2022 South Carolina Rate Case - PSCSC - Piedmont $ in Millions	Apr. 01, 2022 USD ($)
Public Utilities, General Disclosures [Line Items]
Requested rate increase (decrease), amount	$ 7
Requested rate increase, percentage, net of tax	3.40%

Regulatory Matters (Schedule of

Regulatory Matters (Schedule of Net Carrying Value Of Facilities and Megawatt Capacity) (Details) $ in Millions	6 Months Ended	12 Months Ended
	Jun. 30, 2022 USD ($) MW	Dec. 31, 2034 asset	Dec. 31, 2021 USD ($)
Public Utilities, General Disclosures [Line Items]
Net property, plant and equipment	$ 113,851		$ 111,408
Duke Energy Carolinas
Public Utilities, General Disclosures [Line Items]
Net property, plant and equipment	34,959		34,122
Duke Energy Progress
Public Utilities, General Disclosures [Line Items]
Net property, plant and equipment	23,908		23,657
Duke Energy Florida
Public Utilities, General Disclosures [Line Items]
Net property, plant and equipment	18,617		18,046
Duke Energy Indiana
Public Utilities, General Disclosures [Line Items]
Net property, plant and equipment	$ 11,885		$ 11,760
Generation facilities to be retired
Public Utilities, General Disclosures [Line Items]
Capacity (in MW) | MW	8,386
Net property, plant and equipment	$ 6,049
Generation facilities to be retired | Duke Energy Carolinas | Allen Steam Station Unit 1
Public Utilities, General Disclosures [Line Items]
Capacity (in MW) | MW	167
Net property, plant and equipment	$ 12
Generation facilities to be retired | Duke Energy Carolinas | Allen Steam Station Unit 5
Public Utilities, General Disclosures [Line Items]
Capacity (in MW) | MW	259
Net property, plant and equipment	$ 265
Generation facilities to be retired | Duke Energy Carolinas | Cliffside Unit 5
Public Utilities, General Disclosures [Line Items]
Capacity (in MW) | MW	546
Net property, plant and equipment	$ 362
Generation facilities to be retired | Duke Energy Progress | Mayo Unit 1
Public Utilities, General Disclosures [Line Items]
Capacity (in MW) | MW	713
Net property, plant and equipment	$ 634
Generation facilities to be retired | Duke Energy Progress | Roxboro Units 3-4
Public Utilities, General Disclosures [Line Items]
Capacity (in MW) | MW	1,409
Net property, plant and equipment	$ 443
Generation facilities to be retired | Duke Energy Florida | Crystal River Units 4-5
Public Utilities, General Disclosures [Line Items]
Capacity (in MW) | MW	1,442
Net property, plant and equipment	$ 1,615
Generation facilities to be retired | Duke Energy Florida | Crystal River Units 4 and 5 | Forecast
Public Utilities, General Disclosures [Line Items]
Facilities retiring ahead of schedule | asset		2
Facilities retiring ahead of schedule (in years)		8 years
Generation facilities to be retired | Duke Energy Indiana | Gibson Units 1-5
Public Utilities, General Disclosures [Line Items]
Capacity (in MW) | MW	2,845
Net property, plant and equipment	$ 2,058
Generation facilities to be retired | Duke Energy Indiana | Cayuga Units 1-2
Public Utilities, General Disclosures [Line Items]
Capacity (in MW) | MW	1,005
Net property, plant and equipment	$ 660

Commitments and Contingencies_2

Commitments and Contingencies (Schedule of Environmental Loss Contingencies) (Details) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Environmental Matters Details [Line Items]
Reserves for Environmental Remediation	$ 90	$ 88
Duke Energy Carolinas
Environmental Matters Details [Line Items]
Reserves for Environmental Remediation	24	19
Progress Energy
Environmental Matters Details [Line Items]
Reserves for Environmental Remediation	23	23
Duke Energy Progress
Environmental Matters Details [Line Items]
Reserves for Environmental Remediation	12	11
Duke Energy Florida
Environmental Matters Details [Line Items]
Reserves for Environmental Remediation	10	11
Duke Energy Ohio
Environmental Matters Details [Line Items]
Reserves for Environmental Remediation	33	34
Duke Energy Indiana
Environmental Matters Details [Line Items]
Reserves for Environmental Remediation	3	4
Piedmont
Environmental Matters Details [Line Items]
Reserves for Environmental Remediation	$ 7	$ 9

Commitments and Contingencies_3

Commitments and Contingencies (Narrative) (Details) $ in Millions		1 Months Ended
	Jun. 16, 2021 people	Jun. 30, 2022 USD ($) case	Apr. 30, 2022 USD ($)	Dec. 31, 2021 USD ($)	Nov. 15, 2021 lawsuit	Jun. 18, 2018 USD ($)
Texas Storm Uri Tort Litigation | Pending Litigation
Loss Contingencies [Line Items]
Loss contingency, pending claims, number | case		5
Number of cases named as defendant | case		3
Duke Energy Carolinas | Ruben Villano, et al. v. Duke Energy Carolinas, LLC | Pending Litigation
Loss Contingencies [Line Items]
Loss contingency, pending claims, number | lawsuit					1
Number of individuals | people	9
Number of survivors | people	4
Number of deceased individuals | people	5
Duke Energy Carolinas | Asbestos-related Injuries and Damages Claims
Loss Contingencies [Line Items]
Asbestos-related injuries and damages reserves		$ 488		$ 501
Probable insurance recoveries		644		644
Duke Energy and Duke Energy Carolinas | ASU 2016-13
Loss Contingencies [Line Items]
Reserve for credit losses for insurance receivables		12		$ 12
Duke Energy Progress | Spent Nuclear Fuel Matters
Loss Contingencies [Line Items]
Gain contingency, unrecorded amount						$ 100
Amount awarded			$ 87
Duke Energy Florida | Spent Nuclear Fuel Matters
Loss Contingencies [Line Items]
Gain contingency, unrecorded amount						$ 200
Amount awarded		$ 180

Debt and Credit Facilities (Sum

Debt and Credit Facilities (Summary of Debt Issuances) (Details)	Jun. 30, 2022 USD ($)	Jun. 30, 2022 EUR (€)	Dec. 31, 2021 USD ($)
Debt Instrument [Line Items]
Debt issuances	$ 4,034,000,000
Current maturities of long-term debt (includes amounts related to VIEs)	$ 3,171,000,000		$ 3,387,000,000
2.850% March 2022 Notes Due March 2032 | First Mortgage Bonds
Debt Instrument [Line Items]
Interest Rate	2.85%	2.85%
Debt issuances	$ 500,000,000
3.550% March 2022 Notes Due March 2052 | First Mortgage Bonds
Debt Instrument [Line Items]
Interest Rate	3.55%	3.55%
Debt issuances	$ 650,000,000
3.400% March 2022 Notes Due March 2032 | First Mortgage Bonds
Debt Instrument [Line Items]
Interest Rate	3.40%	3.40%
Debt issuances	$ 500,000,000
4.000% March 2022 Notes Due March 2052 | First Mortgage Bonds
Debt Instrument [Line Items]
Interest Rate	4%	4%
Debt issuances	$ 400,000,000
5.050% May 2022 Notes Due May 2052 | Unsecured Debt
Debt Instrument [Line Items]
Interest Rate	5.05%	5.05%
Debt issuances	$ 400,000,000
June 2022 4.750% Notes Due June 2028 | Unsecured Debt
Debt Instrument [Line Items]
Interest Rate	4.75%	4.75%
Debt issuances	$ 645,000,000
June 2022 5.306% Notes Due June 2034 | Unsecured Debt
Debt Instrument [Line Items]
Interest Rate	5.306%	5.306%
Debt issuances	$ 537,000,000
June 2022 4.000% Notes Due September 2030
Debt Instrument [Line Items]
Interest Rate	4%	4%
Debt issuances	$ 168,000,000
June 2022 4.250% Notes Due November 2039
Debt Instrument [Line Items]
Interest Rate	4.25%	4.25%
Debt issuances	$ 234,000,000
Duke Energy (Parent)
Debt Instrument [Line Items]
Debt issuances	1,584,000,000
Duke Energy (Parent) | June 2022 4.750% Notes Due June 2028 | Unsecured Debt
Debt Instrument [Line Items]
Debt issuances	645,000,000
Duke Energy (Parent) | June 2022 5.306% Notes Due June 2034 | Unsecured Debt
Debt Instrument [Line Items]
Debt issuances	$ 537,000,000
Duke Energy (Parent) | Debt Maturing August 2022, 2.400% interest rate | Unsecured Debt
Debt Instrument [Line Items]
Interest Rate	2.40%	2.40%
Current maturities of long-term debt (includes amounts related to VIEs)	$ 500,000,000
Duke Energy (Parent) | Senior Notes, 3.10% Due June 2028
Debt Instrument [Line Items]
Interest Rate	3.10%	3.10%
Debt issuances | €		€ 600,000,000
Duke Energy (Parent) | Senior Notes, 3.85% Due June 2034
Debt Instrument [Line Items]
Interest Rate	3.85%	3.85%
Debt issuances | €		€ 500,000,000
Duke Energy (Parent) | June 2022 4.000% Notes Due September 2030
Debt Instrument [Line Items]
Debt issuances	$ 168,000,000
Duke Energy (Parent) | June 2022 4.250% Notes Due November 2039
Debt Instrument [Line Items]
Debt issuances	234,000,000
Duke Energy Carolinas
Debt Instrument [Line Items]
Debt issuances	1,150,000,000
Current maturities of long-term debt (includes amounts related to VIEs)	1,018,000,000		362,000,000
Duke Energy Carolinas | 2.850% March 2022 Notes Due March 2032 | First Mortgage Bonds
Debt Instrument [Line Items]
Debt issuances	500,000,000
Duke Energy Carolinas | 3.550% March 2022 Notes Due March 2052 | First Mortgage Bonds
Debt Instrument [Line Items]
Debt issuances	650,000,000
Duke Energy Progress
Debt Instrument [Line Items]
Debt issuances	900,000,000
Current maturities of long-term debt (includes amounts related to VIEs)	66,000,000		$ 556,000,000
Duke Energy Progress | 3.400% March 2022 Notes Due March 2032 | First Mortgage Bonds
Debt Instrument [Line Items]
Debt issuances	500,000,000
Duke Energy Progress | 4.000% March 2022 Notes Due March 2052 | First Mortgage Bonds
Debt Instrument [Line Items]
Debt issuances	400,000,000
Duke Energy Progress | June 2022 4.750% Notes Due June 2028
Debt Instrument [Line Items]
Debt issuances	0
Duke Energy Progress | June 2022 5.306% Notes Due June 2034
Debt Instrument [Line Items]
Debt issuances	0
Duke Energy Progress | June 2022 4.000% Notes Due September 2030
Debt Instrument [Line Items]
Debt issuances	0
Duke Energy Progress | June 2022 4.250% Notes Due November 2039
Debt Instrument [Line Items]
Debt issuances	0
Piedmont
Debt Instrument [Line Items]
Debt issuances	400,000,000
Piedmont | 3.400% March 2022 Notes Due March 2032
Debt Instrument [Line Items]
Debt issuances	0
Piedmont | 4.000% March 2022 Notes Due March 2052
Debt Instrument [Line Items]
Debt issuances	0
Piedmont | 5.050% May 2022 Notes Due May 2052 | Unsecured Debt
Debt Instrument [Line Items]
Debt issuances	400,000,000
Piedmont | June 2022 4.750% Notes Due June 2028
Debt Instrument [Line Items]
Debt issuances	0
Piedmont | June 2022 5.306% Notes Due June 2034
Debt Instrument [Line Items]
Debt issuances	0
Piedmont | June 2022 4.000% Notes Due September 2030
Debt Instrument [Line Items]
Debt issuances	0
Piedmont | June 2022 4.250% Notes Due November 2039
Debt Instrument [Line Items]
Debt issuances	$ 0

Debt and Credit Facilities (S_2

Debt and Credit Facilities (Summary of Current Maturities of Long-term Debt) (Details) - USD ($)	1 Months Ended
	May 31, 2022	Jun. 30, 2022	Dec. 31, 2021
Debt Instrument [Line Items]
Current maturities of long-term debt		$ 3,171,000,000	$ 3,387,000,000
Other debt securities
Debt Instrument [Line Items]
Current maturities of long-term debt		821,000,000
Progress Energy
Debt Instrument [Line Items]
Current maturities of long-term debt		$ 393,000,000	1,082,000,000
Duke Energy (Parent) | Debt Maturing August 2022, 2.400% interest rate | Unsecured Debt
Debt Instrument [Line Items]
Interest Rate		2.40%
Current maturities of long-term debt		$ 500,000,000
Amount of debt retired	$ 500,000,000
Duke Energy (Parent) | Debt Maturing April 2023, 2.875% Coupon | Unsecured Debt
Debt Instrument [Line Items]
Interest Rate		2.875%
Current maturities of long-term debt		$ 350,000,000
Duke Energy (Parent) | Debt Maturing June 2023, 1.938% Coupon | Unsecured Debt
Debt Instrument [Line Items]
Interest Rate		1.938%
Current maturities of long-term debt		$ 500,000,000
Duke Energy Carolinas
Debt Instrument [Line Items]
Current maturities of long-term debt		$ 1,018,000,000	362,000,000
Duke Energy Carolinas | Debt Maturing March 2023, 2.500% Coupon | First Mortgage Bonds
Debt Instrument [Line Items]
Interest Rate		2.50%
Current maturities of long-term debt		$ 500,000,000
Duke Energy Carolinas | Debt Maturing March 2023, 3.050% Coupon | First Mortgage Bonds
Debt Instrument [Line Items]
Interest Rate		3.05%
Current maturities of long-term debt		$ 500,000,000
Duke Energy Progress
Debt Instrument [Line Items]
Current maturities of long-term debt		$ 66,000,000	$ 556,000,000

Debt and Credit Facilities (Nar

Debt and Credit Facilities (Narrative) (Details) - USD ($)		1 Months Ended	6 Months Ended
	Mar. 09, 2022	Mar. 31, 2022	Jun. 30, 2022	Dec. 31, 2021
Master Credit Facility
Debt Instrument [Line Items]
Facility size			$ 9,000,000,000	$ 8,000,000,000
Master Credit Facility | Term Loan Facility | Duke Energy (Parent)
Debt Instrument [Line Items]
Facility size	$ 1,400,000,000
Extension period (in years)	2 years
Master Credit Facility | Term Loan Facility | Progress Energy
Debt Instrument [Line Items]
Amount of debt closed		$ 2,500,000,000
June 2017 Three Year Revolving Credit Facility
Debt Instrument [Line Items]
Facility term (in years)		3 years	3 years

Debt and Credit Facilities (Sch

Debt and Credit Facilities (Schedule of Line of Credit Facilities) (Details) - Master Credit Facility - USD ($)	Jun. 30, 2022	Dec. 31, 2021
Line of Credit Facility [Line Items]
Facility size	$ 9,000,000,000	$ 8,000,000,000
Commercial paper	(3,516,000,000)
Outstanding letters of credit	(38,000,000)
Tax-exempt bonds	(81,000,000)
Available capacity under the Master Credit Facility	5,365,000,000
Duke Energy Carolinas
Line of Credit Facility [Line Items]
Facility size	1,225,000,000
Commercial paper	(326,000,000)
Outstanding letters of credit	(4,000,000)
Available capacity under the Master Credit Facility	895,000,000
Duke Energy Progress
Line of Credit Facility [Line Items]
Facility size	1,200,000,000
Commercial paper	(150,000,000)
Outstanding letters of credit	(2,000,000)
Available capacity under the Master Credit Facility	1,048,000,000
Duke Energy Florida
Line of Credit Facility [Line Items]
Facility size	1,100,000,000
Commercial paper	(458,000,000)
Outstanding letters of credit	(7,000,000)
Available capacity under the Master Credit Facility	635,000,000
Duke Energy Ohio
Line of Credit Facility [Line Items]
Facility size	775,000,000
Commercial paper	(299,000,000)
Available capacity under the Master Credit Facility	476,000,000
Duke Energy Indiana
Line of Credit Facility [Line Items]
Facility size	750,000,000
Commercial paper	(400,000,000)
Tax-exempt bonds	(81,000,000)
Available capacity under the Master Credit Facility	269,000,000
Piedmont
Line of Credit Facility [Line Items]
Facility size	800,000,000
Commercial paper	(30,000,000)
Available capacity under the Master Credit Facility	770,000,000
Duke Energy (Parent) | Proceeds loaned to subsidiary registrants
Line of Credit Facility [Line Items]
Commercial paper	(625,000,000)
Duke Energy (Parent) | Duke Energy (Parent)
Line of Credit Facility [Line Items]
Facility size	3,150,000,000
Commercial paper	(1,853,000,000)
Outstanding letters of credit	(25,000,000)
Available capacity under the Master Credit Facility	$ 1,272,000,000

Goodwill (Rollforward of Goodwi

Goodwill (Rollforward of Goodwill) (Details) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Goodwill [Line Items]
Goodwill balance	$ 19,425	$ 19,425
Accumulated impairment charges	(122)	(122)
Goodwill, adjusted for accumulated impairment charges	19,303	19,303
Electric Utilities and Infrastructure
Goodwill [Line Items]
Goodwill balance	17,379	17,379
Goodwill, adjusted for accumulated impairment charges	17,379	17,379
Gas Utilities and Infrastructure
Goodwill [Line Items]
Goodwill balance	1,924	1,924
Goodwill, adjusted for accumulated impairment charges	1,924	1,924
Commercial Renewables
Goodwill [Line Items]
Goodwill balance	122	122
Accumulated impairment charges	$ (122)	$ (122)

Goodwill (Narrative) (Details)

Goodwill (Narrative) (Details) - USD ($)	Jun. 30, 2022	Dec. 31, 2021
Goodwill [Line Items]
Goodwill	$ 19,303,000,000	$ 19,303,000,000
Accumulated impairment charges	122,000,000	122,000,000
Electric Utilities and Infrastructure
Goodwill [Line Items]
Goodwill	17,379,000,000	17,379,000,000
Gas Utilities and Infrastructure
Goodwill [Line Items]
Goodwill	1,924,000,000	1,924,000,000
Duke Energy Ohio
Goodwill [Line Items]
Goodwill	920,000,000	920,000,000
Accumulated impairment charges	216,000,000	216,000,000
Duke Energy Ohio | Electric Utilities and Infrastructure
Goodwill [Line Items]
Goodwill	596,000,000	596,000,000
Duke Energy Ohio | Gas Utilities and Infrastructure
Goodwill [Line Items]
Goodwill	324,000,000	324,000,000
Progress Energy
Goodwill [Line Items]
Goodwill	3,655,000,000	3,655,000,000
Progress Energy | Electric Utilities and Infrastructure
Goodwill [Line Items]
Accumulated impairment charges	0	0
Piedmont
Goodwill [Line Items]
Goodwill	49,000,000	49,000,000
Piedmont | Gas Utilities and Infrastructure
Goodwill [Line Items]
Accumulated impairment charges	$ 0	$ 0

Related Party Transactions (Oth

Related Party Transactions (Other Revenue and Expense) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Duke Energy Carolinas | Corporate governance and shared service expenses | Affiliated Entity
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	$ 191	$ 243	$ 397	$ 446
Duke Energy Carolinas | Indemnification coverages | Affiliated Entity
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	7	6	14	12
Duke Energy Carolinas | JDA | Duke Energy Progress
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	173	25	267	65
Related party transaction, other revenues from transactions with related party	12	13	38	26
Duke Energy Carolinas | Intercompany natural gas purchases and sales | Affiliated Entity
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	5	15	9	29
Progress Energy | Corporate governance and shared service expenses | Affiliated Entity
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	184	233	380	414
Progress Energy | Indemnification coverages | Affiliated Entity
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	11	11	22	21
Progress Energy | JDA | Duke Energy Carolinas
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	12	13	38	26
Related party transaction, other revenues from transactions with related party	173	25	267	65
Progress Energy | Intercompany natural gas purchases and sales | Affiliated Entity
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	19	18	38	37
Duke Energy Progress | Corporate governance and shared service expenses | Affiliated Entity
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	108	141	227	246
Duke Energy Progress | Indemnification coverages | Affiliated Entity
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	5	5	10	10
Duke Energy Progress | JDA | Duke Energy Carolinas
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	12	13	38	26
Related party transaction, other revenues from transactions with related party	173	25	267	65
Duke Energy Progress | Intercompany natural gas purchases and sales | Affiliated Entity
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	19	18	38	37
Duke Energy Florida | Corporate governance and shared service expenses | Affiliated Entity
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	76	92	153	168
Duke Energy Florida | Indemnification coverages | Affiliated Entity
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	6	6	12	11
Duke Energy Ohio | Corporate governance and shared service expenses | Affiliated Entity
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	82	79	164	158
Duke Energy Ohio | Indemnification coverages | Affiliated Entity
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	1	1	2	2
Duke Energy Indiana | Corporate governance and shared service expenses | Affiliated Entity
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	91	93	215	206
Duke Energy Indiana | Indemnification coverages | Affiliated Entity
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	2	2	4	4
Piedmont | Corporate governance and shared service expenses | Affiliated Entity
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	37	36	72	69
Piedmont | Indemnification coverages | Affiliated Entity
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	2	1	3	2
Piedmont | Intercompany natural gas purchases and sales | Affiliated Entity
Related Party Transaction [Line Items]
Related party transaction, other revenues from transactions with related party	24	33	47	66
Piedmont | Natural gas storage and transportation costs | Affiliated Entity
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	$ 5	$ 5	$ 11	$ 11

Related Party Transactions (Int

Related Party Transactions (Intercompany Income Taxes) (Details) - Affiliated Entity - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Duke Energy Carolinas
Related Party Transaction [Line Items]
Intercompany income tax receivable	$ 17
Intercompany income tax payable		$ 62
Progress Energy
Related Party Transaction [Line Items]
Intercompany income tax payable	22
Duke Energy Progress
Related Party Transaction [Line Items]
Intercompany income tax payable	29	84
Duke Energy Florida
Related Party Transaction [Line Items]
Intercompany income tax receivable		40
Intercompany income tax payable	54
Duke Energy Ohio
Related Party Transaction [Line Items]
Intercompany income tax receivable	2	19
Duke Energy Indiana
Related Party Transaction [Line Items]
Intercompany income tax payable	17	10
Piedmont
Related Party Transaction [Line Items]
Intercompany income tax receivable	$ 19
Intercompany income tax payable		$ 27

Derivatives and Hedging (Notion

Derivatives and Hedging (Notional Amounts of Derivative Instruments) (Details) Mcf in Millions, $ in Millions	6 Months Ended	12 Months Ended
	Jun. 30, 2022 USD ($) GWh Mcf	Dec. 31, 2021 USD ($) GWh Mcf
Interest Rate Contracts
Derivative [Line Items]
Notional amount	$ 3,454	$ 3,592
Commodity contracts | Cash flow hedges
Derivative [Line Items]
Notional amount, energy measure (in gigawatt-hours) | GWh	4,477	9,975
Commodity contracts | Electricity (GWh)(a)
Derivative [Line Items]
Notional amount, energy measure (in gigawatt-hours) | GWh	39,032	22,344
Commodity contracts | Natural gas (millions of dekatherms)
Derivative [Line Items]
Notional amount, volume (in millions of dekatherms) | Mcf	873	823
Designated contracts | Interest Rate Contracts
Derivative [Line Items]
Notional amount	$ 2,877	$ 2,415
Designated contracts | Interest Rate Contracts | VIE primary beneficiary
Derivative [Line Items]
Notional amount	627	665
Undesignated contracts | Interest Rate Contracts
Derivative [Line Items]
Notional amount	577	1,177
Duke Energy Carolinas | Interest Rate Contracts
Derivative [Line Items]
Notional amount	$ 250	$ 350
Duke Energy Carolinas | Commodity contracts | Natural gas (millions of dekatherms)
Derivative [Line Items]
Notional amount, volume (in millions of dekatherms) | Mcf	283	264
Duke Energy Carolinas | Undesignated contracts | Interest Rate Contracts
Derivative [Line Items]
Notional amount	$ 250	$ 350
Progress Energy | Interest Rate Contracts
Derivative [Line Items]
Notional amount		$ 500
Progress Energy | Commodity contracts | Natural gas (millions of dekatherms)
Derivative [Line Items]
Notional amount, volume (in millions of dekatherms) | Mcf	259	215
Progress Energy | Undesignated contracts | Interest Rate Contracts
Derivative [Line Items]
Notional amount		$ 500
Duke Energy Progress | Interest Rate Contracts
Derivative [Line Items]
Notional amount		$ 500
Duke Energy Progress | Commodity contracts | Natural gas (millions of dekatherms)
Derivative [Line Items]
Notional amount, volume (in millions of dekatherms) | Mcf	259	215
Duke Energy Progress | Undesignated contracts | Interest Rate Contracts
Derivative [Line Items]
Notional amount		$ 500
Duke Energy Indiana | Interest Rate Contracts
Derivative [Line Items]
Notional amount	$ 300	$ 300
Duke Energy Indiana | Commodity contracts | Electricity (GWh)(a)
Derivative [Line Items]
Notional amount, energy measure (in gigawatt-hours) | GWh	24,241	10,688
Duke Energy Indiana | Commodity contracts | Natural gas (millions of dekatherms)
Derivative [Line Items]
Notional amount, volume (in millions of dekatherms) | Mcf	13	8
Duke Energy Indiana | Undesignated contracts | Interest Rate Contracts
Derivative [Line Items]
Notional amount	$ 300	$ 300
Duke Energy Ohio | Interest Rate Contracts
Derivative [Line Items]
Notional amount	$ 27	$ 27
Duke Energy Ohio | Commodity contracts | Electricity (GWh)(a)
Derivative [Line Items]
Notional amount, energy measure (in gigawatt-hours) | GWh	4,002	1,681
Duke Energy Ohio | Undesignated contracts | Interest Rate Contracts
Derivative [Line Items]
Notional amount	$ 27	$ 27
Piedmont | Commodity contracts | Natural gas (millions of dekatherms)
Derivative [Line Items]
Notional amount, volume (in millions of dekatherms) | Mcf	318	336

Derivatives and Hedging (Foreig

Derivatives and Hedging (Foreign Exchange Risk) (Details) - Foreign Currency Contracts - Designated contracts € in Millions, $ in Millions	6 Months Ended
	Jun. 30, 2022 USD ($)	Jun. 30, 2022 EUR (€)
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional amount	$ 1,182
Receive notional | €		€ 1,100
Fair value gain (loss)	(29)
Senior Notes, 3.10% Due June 2028
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional amount	$ 645
Pay Rate	4.75%	4.75%
Receive notional | €		€ 600
Rate	0.0310	0.0310
Fair value gain (loss)	$ (16)
Senior Notes, 3.85% Due June 2034
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional amount	$ 537
Pay Rate	5.31%	5.31%
Receive notional | €		€ 500
Rate	0.0385	0.0385
Fair value gain (loss)	$ (13)

Derivatives and Hedging (Locati

Derivatives and Hedging (Location and Fair Value Amounts of Derivatives Reflected in the Condensed Consolidated Balance Sheets) (Details) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	$ 1,336	$ 320
Location and fair value amounts of derivatives (Liability)	593	472
Current assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	868	204
Noncurrent assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	468	116
Current liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	190	184
Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	403	288
Commodity Contracts
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	921	312
Location and fair value amounts of derivatives (Liability)	543	348
Interest Rate Contracts
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	415	8
Location and fair value amounts of derivatives (Liability)	6	124
Foreign Currency Contracts
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	44
Not Designated as Hedging Instruments | Commodity Contracts | Current assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	571	199
Not Designated as Hedging Instruments | Commodity Contracts | Noncurrent assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	350	113
Not Designated as Hedging Instruments | Commodity Contracts | Current liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	135	72
Not Designated as Hedging Instruments | Commodity Contracts | Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	259	132
Not Designated as Hedging Instruments | Interest Rate Contracts | Current assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	55	2
Not Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	30
Not Designated as Hedging Instruments | Interest Rate Contracts | Current liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	1	10
Not Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	2	18
Designated as Hedging Instruments | Commodity Contracts | Current liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	35	27
Designated as Hedging Instruments | Commodity Contracts | Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	114	117
Designated as Hedging Instruments | Interest Rate Contracts | Current assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	242
Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	88
Designated as Hedging Instruments | Interest Rate Contracts | Current liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)		3
Location and fair value amounts of derivatives (Liability)	1	75
Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)		3
Location and fair value amounts of derivatives (Liability)	2	21
Designated as Hedging Instruments | Foreign Currency Contracts | Current liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	18
Designated as Hedging Instruments | Foreign Currency Contracts | Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	26
Duke Energy Carolinas
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	484	162
Location and fair value amounts of derivatives (Liability)	41	35
Duke Energy Carolinas | Current assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	268	99
Duke Energy Carolinas | Noncurrent assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	216	63
Duke Energy Carolinas | Current liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	32	26
Duke Energy Carolinas | Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	9	9
Duke Energy Carolinas | Commodity Contracts
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	454	162
Location and fair value amounts of derivatives (Liability)	41	27
Duke Energy Carolinas | Interest Rate Contracts
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	30
Location and fair value amounts of derivatives (Liability)		8
Duke Energy Carolinas | Not Designated as Hedging Instruments | Commodity Contracts | Current assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	268	99
Duke Energy Carolinas | Not Designated as Hedging Instruments | Commodity Contracts | Noncurrent assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	186	63
Duke Energy Carolinas | Not Designated as Hedging Instruments | Commodity Contracts | Current liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	32	18
Duke Energy Carolinas | Not Designated as Hedging Instruments | Commodity Contracts | Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	9	9
Duke Energy Carolinas | Not Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	30
Duke Energy Carolinas | Not Designated as Hedging Instruments | Interest Rate Contracts | Current liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)		8
Progress Energy
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	368	124
Location and fair value amounts of derivatives (Liability)	43	24
Progress Energy | Current assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	203	74
Progress Energy | Noncurrent assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	165	50
Progress Energy | Current liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	33	19
Progress Energy | Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	10	5
Progress Energy | Commodity Contracts
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	368	122
Location and fair value amounts of derivatives (Liability)	43	24
Progress Energy | Interest Rate Contracts
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)		2
Progress Energy | Not Designated as Hedging Instruments | Commodity Contracts | Current assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	203	72
Progress Energy | Not Designated as Hedging Instruments | Commodity Contracts | Noncurrent assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	165	50
Progress Energy | Not Designated as Hedging Instruments | Commodity Contracts | Current liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	33	19
Progress Energy | Not Designated as Hedging Instruments | Commodity Contracts | Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	10	5
Progress Energy | Not Designated as Hedging Instruments | Interest Rate Contracts | Current assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)		2
Duke Energy Progress
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	368	124
Location and fair value amounts of derivatives (Liability)	11	10
Duke Energy Progress | Current assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	203	74
Duke Energy Progress | Noncurrent assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	165	50
Duke Energy Progress | Current liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	1	5
Duke Energy Progress | Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	10	5
Duke Energy Progress | Commodity Contracts
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	368	122
Location and fair value amounts of derivatives (Liability)	11	10
Duke Energy Progress | Interest Rate Contracts
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)		2
Duke Energy Progress | Not Designated as Hedging Instruments | Commodity Contracts | Current assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	203	72
Duke Energy Progress | Not Designated as Hedging Instruments | Commodity Contracts | Noncurrent assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	165	50
Duke Energy Progress | Not Designated as Hedging Instruments | Commodity Contracts | Current liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	1	5
Duke Energy Progress | Not Designated as Hedging Instruments | Commodity Contracts | Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	10	5
Duke Energy Progress | Not Designated as Hedging Instruments | Interest Rate Contracts | Current assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)		2
Duke Energy Florida
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	33	14
Duke Energy Florida | Current liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	33	14
Duke Energy Florida | Commodity Contracts
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	33	14
Duke Energy Florida | Not Designated as Hedging Instruments | Commodity Contracts | Current liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	33	14
Duke Energy Ohio
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	5	2
Location and fair value amounts of derivatives (Liability)	3	5
Duke Energy Ohio | Current assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	5	2
Duke Energy Ohio | Current liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	1	1
Duke Energy Ohio | Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	2	4
Duke Energy Ohio | Commodity Contracts
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	5	2
Duke Energy Ohio | Interest Rate Contracts
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	3	5
Duke Energy Ohio | Not Designated as Hedging Instruments | Commodity Contracts | Current assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	5	2
Duke Energy Ohio | Not Designated as Hedging Instruments | Interest Rate Contracts | Current liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	1	1
Duke Energy Ohio | Not Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	2	4
Duke Energy Indiana
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	141	23
Location and fair value amounts of derivatives (Liability)	21	27
Duke Energy Indiana | Current assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	141	23
Duke Energy Indiana | Current liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	21	13
Duke Energy Indiana | Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)		14
Duke Energy Indiana | Commodity Contracts
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	86	23
Location and fair value amounts of derivatives (Liability)	21	13
Duke Energy Indiana | Interest Rate Contracts
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	55
Location and fair value amounts of derivatives (Liability)		14
Duke Energy Indiana | Not Designated as Hedging Instruments | Commodity Contracts | Current assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	86	23
Duke Energy Indiana | Not Designated as Hedging Instruments | Commodity Contracts | Current liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	21	13
Duke Energy Indiana | Not Designated as Hedging Instruments | Interest Rate Contracts | Current assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)	55
Duke Energy Indiana | Not Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)		14
Piedmont
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)		3
Location and fair value amounts of derivatives (Liability)	193	139
Piedmont | Current assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)		3
Piedmont | Current liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	25	21
Piedmont | Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	168	118
Piedmont | Commodity Contracts
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)		3
Location and fair value amounts of derivatives (Liability)	193	139
Piedmont | Not Designated as Hedging Instruments | Commodity Contracts | Current assets
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Asset)		3
Piedmont | Not Designated as Hedging Instruments | Commodity Contracts | Current liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	25	21
Piedmont | Not Designated as Hedging Instruments | Commodity Contracts | Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives (Liability)	$ 168	$ 118

Derivatives and Hedging (Schedu

Derivatives and Hedging (Schedule of Offsetting Assets) (Details) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	$ 1,336	$ 320
Net amounts presented in Current Assets: Other	1,336	320
Current assets
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	868	204
Gross amounts offset	(331)	(25)
Net amounts presented in Current Assets: Other	537	179
Noncurrent assets
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	468	116
Gross amounts offset	(242)	(23)
Net amounts presented in Current Assets: Other	226	93
Duke Energy Carolinas
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	484	162
Net amounts presented in Current Assets: Other	484	162
Duke Energy Carolinas | Current assets
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	268	99
Gross amounts offset	(193)	(16)
Net amounts presented in Current Assets: Other	75	83
Duke Energy Carolinas | Noncurrent assets
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	216	63
Gross amounts offset	(125)	(15)
Net amounts presented in Current Assets: Other	91	48
Progress Energy
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	368	124
Net amounts presented in Current Assets: Other	368	124
Progress Energy | Current assets
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	203	74
Gross amounts offset	(137)	(9)
Net amounts presented in Current Assets: Other	66	65
Progress Energy | Noncurrent assets
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	165	50
Gross amounts offset	(117)	(8)
Net amounts presented in Current Assets: Other	48	42
Duke Energy Progress
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	368	124
Net amounts presented in Current Assets: Other	368	124
Duke Energy Progress | Current assets
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	203	74
Gross amounts offset	(137)	(9)
Net amounts presented in Current Assets: Other	66	65
Duke Energy Progress | Noncurrent assets
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	165	50
Gross amounts offset	(117)	(8)
Net amounts presented in Current Assets: Other	48	42
Duke Energy Ohio
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	5	2
Duke Energy Ohio | Current assets
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	5	2
Net amounts presented in Current Assets: Other	5	2
Duke Energy Indiana
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	141	23
Net amounts presented in Current Assets: Other	141	23
Duke Energy Indiana | Current assets
Offsetting Derivative Assets [Abstract]
Gross amounts recognized	141	23
Net amounts presented in Current Assets: Other	$ 141	23
Piedmont
Offsetting Derivative Assets [Abstract]
Gross amounts recognized		3
Net amounts presented in Current Assets: Other		3
Piedmont | Current assets
Offsetting Derivative Assets [Abstract]
Gross amounts recognized		3
Net amounts presented in Current Assets: Other		$ 3

Derivatives and Hedging (Sche_2

Derivatives and Hedging (Schedule of Offsetting Liabilities) (Details) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	$ 593	$ 472
Net amounts presented in Current Liabilities: Other	593	472
Current liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	190	184
Gross amounts offset	(19)	(11)
Net amounts presented in Current Liabilities: Other	171	173
Noncurrent liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	403	288
Gross amounts offset	(19)	(12)
Net amounts presented in Current Liabilities: Other	384	276
Duke Energy Carolinas
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	41	35
Net amounts presented in Current Liabilities: Other	41	35
Duke Energy Carolinas | Current liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	32	26
Gross amounts offset	(1)	(6)
Net amounts presented in Current Liabilities: Other	31	20
Duke Energy Carolinas | Noncurrent liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	9	9
Gross amounts offset	(9)	(8)
Net amounts presented in Current Liabilities: Other		1
Progress Energy
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	43	24
Net amounts presented in Current Liabilities: Other	43	24
Progress Energy | Current liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	33	19
Gross amounts offset	(1)	(5)
Net amounts presented in Current Liabilities: Other	32	14
Progress Energy | Noncurrent liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	10	5
Gross amounts offset	(10)	(5)
Duke Energy Progress
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	11	10
Net amounts presented in Current Liabilities: Other	11	10
Duke Energy Progress | Current liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	1	5
Gross amounts offset	(1)	(5)
Duke Energy Progress | Noncurrent liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	10	5
Gross amounts offset	(10)	(5)
Duke Energy Florida
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	33	14
Net amounts presented in Current Liabilities: Other	33	14
Duke Energy Florida | Current liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	33	14
Net amounts presented in Current Liabilities: Other	33	14
Duke Energy Ohio
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	3	5
Duke Energy Ohio | Current liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	1	1
Net amounts presented in Current Liabilities: Other	1	1
Duke Energy Ohio | Noncurrent liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	2	4
Net amounts presented in Current Liabilities: Other	2	4
Duke Energy Indiana
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	21	27
Net amounts presented in Current Liabilities: Other	21	27
Duke Energy Indiana | Current liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	21	13
Gross amounts offset	(17)
Net amounts presented in Current Liabilities: Other	4	13
Duke Energy Indiana | Noncurrent liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized		14
Net amounts presented in Current Liabilities: Other		14
Piedmont
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	193	139
Net amounts presented in Current Liabilities: Other	193	139
Piedmont | Current liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	25	21
Net amounts presented in Current Liabilities: Other	25	21
Piedmont | Noncurrent liabilities
Offsetting Derivative Liabilities [Abstract]
Gross amounts recognized	168	118
Net amounts presented in Current Liabilities: Other	$ 168	$ 118

Investments in Debt and Equit_3

Investments in Debt and Equity Securities (Estimated Fair Value of Investments in Debt and Equity Securities) (Details) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Debt Securities, Available-for-sale
Estimated Fair Value	$ 2,968
Investments, Accumulated Gross Unrealized Gains (Losses) [Abstract]
Unrealized Holding Gains	3,522	$ 5,033
Unrealized Holding Losses	397	66
Estimated Fair Value	9,028	10,893
Duke Energy Carolinas
Debt Securities, Available-for-sale
Estimated Fair Value	1,343
Progress Energy
Debt Securities, Available-for-sale
Estimated Fair Value	1,376
Investments, Accumulated Gross Unrealized Gains (Losses) [Abstract]
Unrealized Holding Gains	1,443	2,062
Unrealized Holding Losses	166	36
Estimated Fair Value	3,891	4,688
Duke Energy Progress
Debt Securities, Available-for-sale
Estimated Fair Value	994
Investments, Accumulated Gross Unrealized Gains (Losses) [Abstract]
Unrealized Holding Gains	1,364	1,957
Unrealized Holding Losses	144	29
Estimated Fair Value	3,385	4,105
Duke Energy Florida
Debt Securities, Available-for-sale
Estimated Fair Value	382
Investments, Accumulated Gross Unrealized Gains (Losses) [Abstract]
Unrealized Holding Gains	79	105
Unrealized Holding Losses	22	7
Estimated Fair Value	504	582
Duke Energy Indiana
Debt Securities, Available-for-sale
Estimated Fair Value	61
NDTF
Available-for-sale Securities
Cash and cash equivalents	134	160
Equity Securities, FV-NI
Equity Securities, FV-NI, Accumulated Unrealized Gain	3,500	4,905
Equity Securities, FV-NI, Accumulated Unrealized Loss	141	43
Equity securities, FV-NI	5,751	7,350
Debt Securities, Available-for-sale
Estimated Fair Value	2,694	2,891
Investments, Accumulated Gross Unrealized Gains (Losses) [Abstract]
Unrealized Holding Gains	3,502	4,992
Unrealized Holding Losses	357	63
Estimated Fair Value	8,579	10,401
NDTF | Duke Energy Carolinas
Available-for-sale Securities
Cash and cash equivalents	58	53
Equity Securities, FV-NI
Equity Securities, FV-NI, Accumulated Unrealized Gain	2,058	2,887
Equity Securities, FV-NI, Accumulated Unrealized Loss	69	19
Equity securities, FV-NI	3,327	4,265
Debt Securities, Available-for-sale
Estimated Fair Value	1,343	1,441
Investments, Accumulated Gross Unrealized Gains (Losses) [Abstract]
Unrealized Holding Gains	2,059	2,932
Unrealized Holding Losses	191	27
Estimated Fair Value	4,728	5,759
NDTF | Progress Energy
Available-for-sale Securities
Cash and cash equivalents	76	107
Equity Securities, FV-NI
Equity Securities, FV-NI, Accumulated Unrealized Gain	1,442	2,018
Equity Securities, FV-NI, Accumulated Unrealized Loss	72	24
Equity securities, FV-NI	2,424	3,085
Debt Securities, Available-for-sale
Estimated Fair Value	1,351	1,450
Investments, Accumulated Gross Unrealized Gains (Losses) [Abstract]
Unrealized Holding Gains	1,443	2,060
Unrealized Holding Losses	166	36
Estimated Fair Value	3,851	4,642
NDTF | Duke Energy Progress
Available-for-sale Securities
Cash and cash equivalents	46	94
Equity Securities, FV-NI
Equity Securities, FV-NI, Accumulated Unrealized Gain	1,363	1,915
Equity Securities, FV-NI, Accumulated Unrealized Loss	72	23
Equity securities, FV-NI	2,333	2,970
Debt Securities, Available-for-sale
Estimated Fair Value	994	1,025
Investments, Accumulated Gross Unrealized Gains (Losses) [Abstract]
Unrealized Holding Gains	1,364	1,957
Unrealized Holding Losses	144	29
Estimated Fair Value	3,373	4,089
NDTF | Duke Energy Florida
Available-for-sale Securities
Cash and cash equivalents	30	13
Equity Securities, FV-NI
Equity Securities, FV-NI, Accumulated Unrealized Gain	79	103
Equity Securities, FV-NI, Accumulated Unrealized Loss		1
Equity securities, FV-NI	91	115
Debt Securities, Available-for-sale
Estimated Fair Value	357	425
Investments, Accumulated Gross Unrealized Gains (Losses) [Abstract]
Unrealized Holding Gains	79	103
Unrealized Holding Losses	22	7
Estimated Fair Value	478	553
Other Investments
Available-for-sale Securities
Cash and cash equivalents	51	36
Equity Securities, FV-NI
Equity Securities, FV-NI, Accumulated Unrealized Gain	20	36
Equity Securities, FV-NI, Accumulated Unrealized Loss	17
Equity securities, FV-NI	124	156
Debt Securities, Available-for-sale
Estimated Fair Value	274	300
Investments, Accumulated Gross Unrealized Gains (Losses) [Abstract]
Unrealized Holding Gains	20	41
Unrealized Holding Losses	40	3
Estimated Fair Value	449	492
Other Investments | Progress Energy
Available-for-sale Securities
Cash and cash equivalents	15	20
Debt Securities, Available-for-sale
Estimated Fair Value	25	26
Investments, Accumulated Gross Unrealized Gains (Losses) [Abstract]
Unrealized Holding Gains		2
Estimated Fair Value	40	46
Other Investments | Duke Energy Progress
Available-for-sale Securities
Cash and cash equivalents	12	16
Investments, Accumulated Gross Unrealized Gains (Losses) [Abstract]
Estimated Fair Value	12	16
Other Investments | Duke Energy Florida
Available-for-sale Securities
Cash and cash equivalents	1	3
Debt Securities, Available-for-sale
Estimated Fair Value	25	26
Investments, Accumulated Gross Unrealized Gains (Losses) [Abstract]
Unrealized Holding Gains		2
Estimated Fair Value	26	29
Other Investments | Duke Energy Indiana
Equity Securities, FV-NI
Equity Securities, FV-NI, Accumulated Unrealized Gain	2	6
Equity Securities, FV-NI, Accumulated Unrealized Loss	17
Equity securities, FV-NI	77	97
Debt Securities, Available-for-sale
Estimated Fair Value	61	64
Investments, Accumulated Gross Unrealized Gains (Losses) [Abstract]
Unrealized Holding Gains	2	7
Unrealized Holding Losses	20	1
Estimated Fair Value	138	161
Corporate debt securities | NDTF
Debt Securities, Available-for-sale
Gross Unrealized Holding Gains		39
Gross Unrealized Holding Losses	81	6
Estimated Fair Value	728	829
Corporate debt securities | NDTF | Duke Energy Carolinas
Debt Securities, Available-for-sale
Gross Unrealized Holding Gains		24
Gross Unrealized Holding Losses	63	4
Estimated Fair Value	470	506
Corporate debt securities | NDTF | Progress Energy
Debt Securities, Available-for-sale
Gross Unrealized Holding Gains		15
Gross Unrealized Holding Losses	18	2
Estimated Fair Value	258	323
Corporate debt securities | NDTF | Duke Energy Progress
Debt Securities, Available-for-sale
Gross Unrealized Holding Gains		15
Gross Unrealized Holding Losses	17	2
Estimated Fair Value	241	282
Corporate debt securities | NDTF | Duke Energy Florida
Debt Securities, Available-for-sale
Gross Unrealized Holding Losses	1
Estimated Fair Value	17	41
Corporate debt securities | Other Investments
Debt Securities, Available-for-sale
Gross Unrealized Holding Gains		2
Gross Unrealized Holding Losses	13	1
Estimated Fair Value	108	119
Corporate debt securities | Other Investments | Duke Energy Indiana
Debt Securities, Available-for-sale
Estimated Fair Value	8	6
Municipal bonds | NDTF
Debt Securities, Available-for-sale
Gross Unrealized Holding Gains		14
Gross Unrealized Holding Losses	32	1
Estimated Fair Value	334	314
Municipal bonds | NDTF | Duke Energy Carolinas
Debt Securities, Available-for-sale
Gross Unrealized Holding Gains		2
Gross Unrealized Holding Losses	9
Estimated Fair Value	63	48
Municipal bonds | NDTF | Progress Energy
Debt Securities, Available-for-sale
Gross Unrealized Holding Gains		12
Gross Unrealized Holding Losses	23	1
Estimated Fair Value	271	266
Municipal bonds | NDTF | Duke Energy Progress
Debt Securities, Available-for-sale
Gross Unrealized Holding Gains		12
Gross Unrealized Holding Losses	23	1
Estimated Fair Value	271	266
Municipal bonds | Other Investments
Debt Securities, Available-for-sale
Gross Unrealized Holding Gains		3
Gross Unrealized Holding Losses	3	1
Estimated Fair Value	82	80
Municipal bonds | Other Investments | Progress Energy
Debt Securities, Available-for-sale
Gross Unrealized Holding Gains		2
Estimated Fair Value	25	26
Municipal bonds | Other Investments | Duke Energy Florida
Debt Securities, Available-for-sale
Gross Unrealized Holding Gains		2
Estimated Fair Value	25	26
Municipal bonds | Other Investments | Duke Energy Indiana
Debt Securities, Available-for-sale
Gross Unrealized Holding Gains		1
Gross Unrealized Holding Losses	3	1
Estimated Fair Value	48	46
U.S. government bonds | NDTF
Debt Securities, Available-for-sale
Gross Unrealized Holding Gains	2	31
Gross Unrealized Holding Losses	89	12
Estimated Fair Value	1,462	1,568
U.S. government bonds | NDTF | Duke Energy Carolinas
Debt Securities, Available-for-sale
Gross Unrealized Holding Gains	1	16
Gross Unrealized Holding Losses	37	3
Estimated Fair Value	645	712
U.S. government bonds | NDTF | Progress Energy
Debt Securities, Available-for-sale
Gross Unrealized Holding Gains	1	15
Gross Unrealized Holding Losses	52	9
Estimated Fair Value	817	856
U.S. government bonds | NDTF | Duke Energy Progress
Debt Securities, Available-for-sale
Gross Unrealized Holding Gains	1	15
Gross Unrealized Holding Losses	31	3
Estimated Fair Value	477	472
U.S. government bonds | NDTF | Duke Energy Florida
Debt Securities, Available-for-sale
Gross Unrealized Holding Losses	21	6
Estimated Fair Value	340	384
U.S. government bonds | Other Investments
Debt Securities, Available-for-sale
Gross Unrealized Holding Losses	5
Estimated Fair Value	49	56
U.S. government bonds | Other Investments | Duke Energy Indiana
Debt Securities, Available-for-sale
Estimated Fair Value	5	12
Other debt securities | NDTF
Debt Securities, Available-for-sale
Gross Unrealized Holding Gains		3
Gross Unrealized Holding Losses	14	1
Estimated Fair Value	170	180
Other debt securities | NDTF | Duke Energy Carolinas
Debt Securities, Available-for-sale
Gross Unrealized Holding Gains		3
Gross Unrealized Holding Losses	13	1
Estimated Fair Value	165	175
Other debt securities | NDTF | Progress Energy
Debt Securities, Available-for-sale
Gross Unrealized Holding Losses	1
Estimated Fair Value	5	5
Other debt securities | NDTF | Duke Energy Progress
Debt Securities, Available-for-sale
Gross Unrealized Holding Losses	1
Estimated Fair Value	5	5
Other debt securities | Other Investments
Debt Securities, Available-for-sale
Gross Unrealized Holding Losses	2	1
Estimated Fair Value	$ 35	$ 45

Investments in Debt and Equit_4

Investments in Debt and Equity Securities (Realized Gains and Losses) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
FV-NI:
Realized gains	$ 34	$ 146	$ 145	$ 286
Realized losses	101	37	186	60
AFS:
Realized gains	11	16	15	34
Realized losses	42	18	65	31
Duke Energy Carolinas
FV-NI:
Realized gains	18	90	93	218
Realized losses	55	23	104	39
AFS:
Realized gains	9	12	12	25
Realized losses	21	13	37	22
Progress Energy
FV-NI:
Realized gains	16	56	52	68
Realized losses	46	14	82	21
AFS:
Realized gains	2	3	3	7
Realized losses	17	3	23	6
Duke Energy Progress
FV-NI:
Realized gains	15	55	51	67
Realized losses	45	13	80	20
AFS:
Realized gains	2	3	3	7
Realized losses	$ 15	$ 3	$ 20	$ 6

Investments in Debt and Equit_5

Investments in Debt and Equity Securities (Maturities) (Details) $ in Millions	Jun. 30, 2022 USD ($)
Debt Securities, Available-for-sale [Line Items]
Due in one year or less	$ 137
Due after one through five years	930
Due after five through 10 years	484
Due after 10 years	1,417
Total	2,968
Duke Energy Carolinas
Debt Securities, Available-for-sale [Line Items]
Due in one year or less	7
Due after one through five years	350
Due after five through 10 years	209
Due after 10 years	777
Total	1,343
Progress Energy
Debt Securities, Available-for-sale [Line Items]
Due in one year or less	118
Due after one through five years	501
Due after five through 10 years	204
Due after 10 years	553
Total	1,376
Duke Energy Progress
Debt Securities, Available-for-sale [Line Items]
Due in one year or less	24
Due after one through five years	266
Due after five through 10 years	189
Due after 10 years	515
Total	994
Duke Energy Florida
Debt Securities, Available-for-sale [Line Items]
Due in one year or less	94
Due after one through five years	235
Due after five through 10 years	15
Due after 10 years	38
Total	382
Duke Energy Indiana
Debt Securities, Available-for-sale [Line Items]
Due in one year or less	9
Due after one through five years	23
Due after five through 10 years	6
Due after 10 years	23
Total	$ 61

Fair Value Measurements (Fair V

Fair Value Measurements (Fair Value Measurement Amounts for Assets and Liabilities) (Details) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt securities, available-for-sale	$ 2,968
Derivative assets	1,336	$ 320
Total assets	10,364	11,213
Derivative liabilities	(593)	(472)
Net assets (liabilities)	9,771	10,741
Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	2	3
Total assets	6,908	8,667
Derivative liabilities	(21)	(13)
Net assets (liabilities)	6,887	8,654
Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	1,245	293
Total assets	3,320	2,472
Derivative liabilities	(327)	(314)
Net assets (liabilities)	2,993	2,158
Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	89	24
Total assets	89	24
Derivative liabilities	(245)	(145)
Net assets (liabilities)	(156)	(121)
Not Categorized
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total assets	47	50
Net assets (liabilities)	47	50
NDTF
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	134	160
Equity securities, FV-NI	5,751	7,350
Debt securities, available-for-sale	2,694	2,891
NDTF | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	134	160
Debt securities, available-for-sale	849	967
NDTF | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt securities, available-for-sale	1,845	1,924
NDTF equity securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Equity securities, FV-NI	5,751	7,350
NDTF equity securities | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Equity securities, FV-NI	5,704	7,300
NDTF equity securities | Not Categorized
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Equity securities, FV-NI	47	50
Other Investments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	51	36
Equity securities, FV-NI	124	156
Debt securities, available-for-sale	274	300
Other Investments | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	51	36
Equity securities, FV-NI	124	156
Debt securities, available-for-sale	44	45
Other Investments | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt securities, available-for-sale	230	255
Duke Energy Carolinas
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt securities, available-for-sale	1,343
Derivative assets	484	162
Total assets	5,212	5,921
Derivative liabilities	(41)	(35)
Net assets (liabilities)	5,171	5,886
Duke Energy Carolinas | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total assets	3,642	4,607
Net assets (liabilities)	3,642	4,607
Duke Energy Carolinas | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	484	162
Total assets	1,523	1,264
Derivative liabilities	(41)	(35)
Net assets (liabilities)	1,482	1,229
Duke Energy Carolinas | Not Categorized
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total assets	47	50
Net assets (liabilities)	47	50
Duke Energy Carolinas | NDTF
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	58	53
Equity securities, FV-NI	3,327	4,265
Debt securities, available-for-sale	1,343	1,441
Duke Energy Carolinas | NDTF | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	58	53
Debt securities, available-for-sale	304	339
Duke Energy Carolinas | NDTF | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt securities, available-for-sale	1,039	1,102
Duke Energy Carolinas | NDTF equity securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Equity securities, FV-NI	3,327	4,265
Duke Energy Carolinas | NDTF equity securities | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Equity securities, FV-NI	3,280	4,215
Duke Energy Carolinas | NDTF equity securities | Not Categorized
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Equity securities, FV-NI	47	50
Progress Energy
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt securities, available-for-sale	1,376
Derivative assets	368	124
Total assets	4,259	4,812
Derivative liabilities	(43)	(24)
Net assets (liabilities)	4,216	4,788
Progress Energy | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total assets	3,060	3,840
Net assets (liabilities)	3,060	3,840
Progress Energy | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	368	124
Total assets	1,199	972
Derivative liabilities	(43)	(24)
Net assets (liabilities)	1,156	948
Progress Energy | NDTF
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	76	107
Equity securities, FV-NI	2,424	3,085
Debt securities, available-for-sale	1,351	1,450
Progress Energy | NDTF | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	76	107
Debt securities, available-for-sale	545	628
Progress Energy | NDTF | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt securities, available-for-sale	806	822
Progress Energy | NDTF equity securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Equity securities, FV-NI	2,424	3,085
Progress Energy | NDTF equity securities | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Equity securities, FV-NI	2,424	3,085
Progress Energy | Other Investments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	15	20
Debt securities, available-for-sale	25	26
Progress Energy | Other Investments | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	15	20
Progress Energy | Other Investments | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt securities, available-for-sale	25	26
Duke Energy Progress
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt securities, available-for-sale	994
Derivative assets	368	124
Total assets	3,753	4,229
Derivative liabilities	(11)	(10)
Net assets (liabilities)	3,742	4,219
Duke Energy Progress | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total assets	2,644	3,369
Net assets (liabilities)	2,644	3,369
Duke Energy Progress | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	368	124
Total assets	1,109	860
Derivative liabilities	(11)	(10)
Net assets (liabilities)	1,098	850
Duke Energy Progress | NDTF
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	46	94
Equity securities, FV-NI	2,333	2,970
Debt securities, available-for-sale	994	1,025
Duke Energy Progress | NDTF | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	46	94
Debt securities, available-for-sale	253	289
Duke Energy Progress | NDTF | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt securities, available-for-sale	741	736
Duke Energy Progress | NDTF equity securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Equity securities, FV-NI	2,333	2,970
Duke Energy Progress | NDTF equity securities | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Equity securities, FV-NI	2,333	2,970
Duke Energy Progress | Other Investments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	12	16
Duke Energy Progress | Other Investments | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	12	16
Duke Energy Florida
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt securities, available-for-sale	382
Total assets	504	582
Derivative liabilities	(33)	(14)
Net assets (liabilities)	471	568
Duke Energy Florida | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total assets	414	470
Net assets (liabilities)	414	470
Duke Energy Florida | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total assets	90	112
Derivative liabilities	(33)	(14)
Net assets (liabilities)	57	98
Duke Energy Florida | NDTF
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	30	13
Equity securities, FV-NI	91	115
Debt securities, available-for-sale	357	425
Duke Energy Florida | NDTF | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	30	13
Debt securities, available-for-sale	292	339
Duke Energy Florida | NDTF | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt securities, available-for-sale	65	86
Duke Energy Florida | NDTF equity securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Equity securities, FV-NI	91	115
Duke Energy Florida | NDTF equity securities | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Equity securities, FV-NI	91	115
Duke Energy Florida | Other Investments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	1	3
Debt securities, available-for-sale	25	26
Duke Energy Florida | Other Investments | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	1	3
Duke Energy Florida | Other Investments | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt securities, available-for-sale	25	26
Duke Energy Indiana
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt securities, available-for-sale	61
Derivative assets	141	23
Total assets	279	184
Derivative liabilities	(21)	(27)
Net assets (liabilities)	258	157
Duke Energy Indiana | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	2	1
Total assets	79	98
Derivative liabilities	(21)	(13)
Net assets (liabilities)	58	85
Duke Energy Indiana | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	55
Total assets	116	64
Derivative liabilities		(14)
Net assets (liabilities)	116	50
Duke Energy Indiana | Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets	84	22
Total assets	84	22
Net assets (liabilities)	84	22
Duke Energy Indiana | Other Investments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Equity securities, FV-NI	77	97
Debt securities, available-for-sale	61	64
Duke Energy Indiana | Other Investments | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Equity securities, FV-NI	77	97
Duke Energy Indiana | Other Investments | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt securities, available-for-sale	61	64
Piedmont
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets		3
Derivative liabilities	(193)	(139)
Net assets (liabilities)	(193)	(136)
Piedmont | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets		3
Net assets (liabilities)		3
Piedmont | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative liabilities	(193)	(139)
Net assets (liabilities)	$ (193)	$ (139)

Fair Value Measurements (Reconc

Fair Value Measurements (Reconciliation of Assets and Liabilities Measured At Fair Value On A Recurring Basis Using Unobservable Inputs) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Derivatives (net)
Balance at beginning of period	$ (199)	$ (126)	$ (121)	$ (77)
Total pretax realized or unrealized losses included in comprehensive income	(42)	(31)	(110)	(75)
Purchases, sales, issuances and settlements:
Purchases	77	21	77	21
Settlements	21	(1)	18	(8)
Total (losses) gains included on the Condensed Consolidated Balance Sheet	(13)	6	(20)	8
Balance at end of period	(156)	(131)	(156)	(131)
Duke Energy Indiana
Derivatives (net)
Balance at beginning of period	10	2	22	6
Purchases, sales, issuances and settlements:
Purchases	74	18	74	18
Settlements	16	(3)	10	(9)
Total (losses) gains included on the Condensed Consolidated Balance Sheet	(16)	5	(22)	7
Balance at end of period	$ 84	$ 22	$ 84	$ 22

Fair Value Measurements (Quanti

Fair Value Measurements (Quantitative Level 3 Fair Value Disclosures) (Details) $ in Millions	Jun. 30, 2022 USD ($) $ / MWh	Mar. 31, 2022 USD ($)	Dec. 31, 2021 USD ($) $ / MWh	Jun. 30, 2021 USD ($)	Mar. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Fair Value Measurement Inputs and Valuation Techniques
Net derivative asset (liability) | $	$ (156)	$ (199)	$ (121)	$ (131)	$ (126)	$ (77)
Electricity contracts | RTO auction pricing
Fair Value Measurement Inputs and Valuation Techniques
Net derivative asset (liability) | $	$ (245)		$ (145)
Electricity contracts | RTO auction pricing | Minimum
Fair Value Measurement Inputs and Valuation Techniques
Input measurements (in usd per MWh and usd per MMBtu)	23.35		19.04
Electricity contracts | RTO auction pricing | Maximum
Fair Value Measurement Inputs and Valuation Techniques
Input measurements (in usd per MWh and usd per MMBtu)	243.21		139.11
Electricity contracts | RTO auction pricing | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques
Input measurements (in usd per MWh and usd per MMBtu)	53.28		37,570,000
Duke Energy Ohio | FTRs | RTO auction pricing
Fair Value Measurement Inputs and Valuation Techniques
Net derivative asset (liability) | $	$ 5		$ 2
Duke Energy Ohio | FTRs | RTO auction pricing | Minimum
Fair Value Measurement Inputs and Valuation Techniques
Input measurements (in usd per MWh and usd per MMBtu)	(0.29)		0.06
Duke Energy Ohio | FTRs | RTO auction pricing | Maximum
Fair Value Measurement Inputs and Valuation Techniques
Input measurements (in usd per MWh and usd per MMBtu)	2.30		1.79
Duke Energy Ohio | FTRs | RTO auction pricing | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques
Input measurements (in usd per MWh and usd per MMBtu)	0.89		0.96
Duke Energy Indiana
Fair Value Measurement Inputs and Valuation Techniques
Net derivative asset (liability) | $	$ 84	$ 10	$ 22	$ 22	$ 2	$ 6
Duke Energy Indiana | FTRs | RTO auction pricing
Fair Value Measurement Inputs and Valuation Techniques
Net derivative asset (liability) | $	$ 84		$ 22
Duke Energy Indiana | FTRs | RTO auction pricing | Minimum
Fair Value Measurement Inputs and Valuation Techniques
Input measurements (in usd per MWh and usd per MMBtu)	(0.61)		(1.18)
Duke Energy Indiana | FTRs | RTO auction pricing | Maximum
Fair Value Measurement Inputs and Valuation Techniques
Input measurements (in usd per MWh and usd per MMBtu)	24.34		13.11
Duke Energy Indiana | FTRs | RTO auction pricing | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques
Input measurements (in usd per MWh and usd per MMBtu)	3.69		2.68

Fair Value Measurements (Other

Fair Value Measurements (Other Fair Value Disclosure) (Details) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Book Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	$ 66,318	$ 63,835
Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	61,451	69,683
Piedmont Natural Gas and Progress Energy
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Unamortized debt discount (premium), net	1,210	1,250
Duke Energy Carolinas | Book Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	14,162	13,275
Duke Energy Carolinas | Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	13,501	15,101
Progress Energy | Book Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	20,751	20,823
Progress Energy | Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	19,830	23,751
Duke Energy Progress | Book Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	10,662	10,249
Duke Energy Progress | Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	9,829	11,252
Duke Energy Florida | Book Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	8,447	8,482
Duke Energy Florida | Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	8,150	9,772
Duke Energy Ohio | Book Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	3,243	3,193
Duke Energy Ohio | Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	3,071	3,570
Duke Energy Indiana | Book Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	4,337	4,323
Duke Energy Indiana | Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	4,168	5,067
Piedmont | Book Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	3,363	2,968
Piedmont | Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	$ 3,086	$ 3,278

Variable Interest Entities (Nar

Variable Interest Entities (Narrative) (Details) - USD ($)	1 Months Ended	3 Months Ended	6 Months Ended
	Nov. 30, 2021	Mar. 31, 2022	Jun. 30, 2022
VIE primary beneficiary
Variable Interest Entities [Line Items]
Variable interest entity, financial or other support, amount		$ 0	$ 0
VIE primary beneficiary | CRC
Variable Interest Entities [Line Items]
Percent of proceeds received as cash			75%
Percent of proceeds received as subordinated note			25%
Minimum equity balance required by Cinergy Receivables			$ 3,000,000
VIE primary beneficiary | DECNCSF | Duke Energy Carolinas
Variable Interest Entities [Line Items]
Proceeds from issuance of senior secured bonds	$ 237,000,000
VIE primary beneficiary | DEPNCSF | Duke Energy Progress
Variable Interest Entities [Line Items]
Proceeds from issuance of senior secured bonds	$ 770,000,000
VIE not primary beneficiary | VIE With Ownership In Portfolio Of Wind Projects
Variable Interest Entities [Line Items]
Variable interest entity ownership interest			50%
VIE not primary beneficiary | OVEC
Variable Interest Entities [Line Items]
Variable interest entity ownership interest			9%

Variable Interest Entities (Sch

Variable Interest Entities (Schedule of Accounts Receivable Securitizations) (Details) - USD ($)	Jun. 30, 2022	Dec. 31, 2021
Variable Interest Entities [Line Items]
Long-Term Debt	$ 63,147,000,000	$ 60,448,000,000
Duke Energy Carolinas
Variable Interest Entities [Line Items]
Long-Term Debt	12,844,000,000	12,595,000,000
Duke Energy Progress
Variable Interest Entities [Line Items]
Long-Term Debt	10,446,000,000	9,543,000,000
Duke Energy Florida
Variable Interest Entities [Line Items]
Long-Term Debt	8,120,000,000	8,406,000,000
CRC | VIE primary beneficiary
Variable Interest Entities [Line Items]
Facility size	350,000,000
Long-Term Debt	350,000,000	350,000,000
Accounts receivable from securitization	776,000,000	587,000,000
DERF | Duke Energy Carolinas | VIE primary beneficiary
Variable Interest Entities [Line Items]
Facility size	500,000,000
Long-Term Debt	498,000,000	475,000,000
Accounts receivable from securitization	893,000,000	844,000,000
DEPR | Duke Energy Progress | VIE primary beneficiary
Variable Interest Entities [Line Items]
Facility size	400,000,000
Long-Term Debt	400,000,000	350,000,000
Accounts receivable from securitization	705,000,000	574,000,000
DEFR | Duke Energy Florida | VIE primary beneficiary
Variable Interest Entities [Line Items]
Facility size	250,000,000
Long-Term Debt	250,000,000	250,000,000
Accounts receivable from securitization	$ 640,000,000	$ 427,000,000

Variable Interest Entities (S_2

Variable Interest Entities (Schedule of Consolidated VIEs) (Details) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Variable Interest Entities [Line Items]
Regulatory Assets: Current	$ 2,834	$ 2,150
Current Assets: Other	1,163	638
Other Noncurrent Assets: Regulatory assets	12,863	12,487
Property, Plant and Equipment: Cost	166,004	161,819
Accumulated depreciation and amortization	(52,252)	(50,555)
Other Noncurrent Assets: Other	4,026	3,812
Current Liabilities: Other	2,259	2,471
Current maturities of long-term debt	3,171	3,387
Long-Term Debt	63,147	60,448
Other Noncurrent Liabilities: AROs	12,080	12,129
Other Noncurrent Liabilities: Other	1,868	1,650
Duke Energy Florida
Variable Interest Entities [Line Items]
Regulatory Assets: Current	785	497
Current Assets: Other	58	80
Other Noncurrent Assets: Regulatory assets	1,920	1,791
Property, Plant and Equipment: Cost	24,714	23,865
Accumulated depreciation and amortization	(6,097)	(5,819)
Other Noncurrent Assets: Other	407	399
Current Liabilities: Other	394	408
Current maturities of long-term debt	327	76
Long-Term Debt	8,120	8,406
Other Noncurrent Liabilities: AROs	392	436
Other Noncurrent Liabilities: Other	333	309
Duke Energy Carolinas
Variable Interest Entities [Line Items]
Regulatory Assets: Current	757	544
Current Assets: Other	128	95
Other Noncurrent Assets: Regulatory assets	3,339	2,935
Property, Plant and Equipment: Cost	53,074	51,874
Accumulated depreciation and amortization	(18,205)	(17,854)
Other Noncurrent Assets: Other	1,305	1,248
Current Liabilities: Other	470	546
Current maturities of long-term debt	1,018	362
Long-Term Debt	12,844	12,595
Other Noncurrent Liabilities: AROs	5,065	5,052
Other Noncurrent Liabilities: Other	558	536
Duke Energy Progress
Variable Interest Entities [Line Items]
Regulatory Assets: Current	621	533
Current Assets: Other	123	83
Other Noncurrent Assets: Regulatory assets	4,161	4,118
Property, Plant and Equipment: Cost	37,885	37,018
Accumulated depreciation and amortization	(13,977)	(13,387)
Other Noncurrent Assets: Other	787	792
Current Liabilities: Other	425	448
Current maturities of long-term debt	66	556
Long-Term Debt	10,446	9,543
Other Noncurrent Liabilities: AROs	5,414	5,401
Other Noncurrent Liabilities: Other	100	87
DEFPF | Duke Energy Florida | VIE primary beneficiary
Variable Interest Entities [Line Items]
Receivables of VIEs	7	5
Regulatory Assets: Current	54	54
Current Assets: Other	33	39
Other Noncurrent Assets: Regulatory assets	859	883
Current Liabilities: Other	9	9
Current maturities of long-term debt	56	56
Long-Term Debt	916	946
DECNCSF | Duke Energy Carolinas | VIE primary beneficiary
Variable Interest Entities [Line Items]
Regulatory Assets: Current	12	12
Current Assets: Other	8
Other Noncurrent Assets: Regulatory assets	214	220
Other Noncurrent Assets: Other	1	1
Current Liabilities: Other	3	1
Current maturities of long-term debt	10	5
Long-Term Debt	224	228
DEPNCSF | Duke Energy Progress | VIE primary beneficiary
Variable Interest Entities [Line Items]
Regulatory Assets: Current	39	39
Current Assets: Other	26
Other Noncurrent Assets: Regulatory assets	701	720
Other Noncurrent Assets: Other	4	4
Current Liabilities: Other	10	2
Current maturities of long-term debt	32	15
Long-Term Debt	731	747
Commercial Renewables | VIE primary beneficiary
Variable Interest Entities [Line Items]
Current Assets: Other	215	215
Property, Plant and Equipment: Cost	7,552	7,339
Accumulated depreciation and amortization	(1,646)	(1,474)
Other Noncurrent Assets: Other	75	62
Current maturities of long-term debt	285	167
Long-Term Debt	1,255	1,475
Other Noncurrent Liabilities: AROs	176	173
Other Noncurrent Liabilities: Other	$ 213	$ 319

Variable Interest Entities (S_3

Variable Interest Entities (Schedule of Non-Consolidated VIEs) (Details) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Variable Interest Entities [Line Items]
Investments in equity method unconsolidated affiliates	$ 983	$ 970
Other noncurrent assets	4,026	3,812
Total Assets	172,383	169,587
Other current liabilities	2,259	2,471
Other, noncurrent liabilities	1,868	1,650
VIE not primary beneficiary
Variable Interest Entities [Line Items]
Investments in equity method unconsolidated affiliates	536	523
Other noncurrent assets		61
Deferred tax asset	62
Total Assets	598	584
Other current liabilities	57	51
Other, noncurrent liabilities	54	57
Total liabilities	111	108
Net assets	487	476
Duke Energy Ohio
Variable Interest Entities [Line Items]
Other noncurrent assets	88	84
Total Assets	11,015	10,774
Other current liabilities	112	82
Other, noncurrent liabilities	100	101
Duke Energy Ohio | VIE not primary beneficiary
Variable Interest Entities [Line Items]
Receivables from affiliated companies	131	79
Total Assets	131	79
Net assets	131	79
Duke Energy Indiana
Variable Interest Entities [Line Items]
Other noncurrent assets	265	296
Total Assets	14,675	14,488
Other current liabilities	179	105
Other, noncurrent liabilities	75	44
Duke Energy Indiana | VIE not primary beneficiary
Variable Interest Entities [Line Items]
Receivables from affiliated companies	222	97
Total Assets	222	97
Net assets	222	97
Pipeline Investments | VIE not primary beneficiary
Variable Interest Entities [Line Items]
Investments in equity method unconsolidated affiliates	29	15
Other noncurrent assets		61
Deferred tax asset	62
Total Assets	91	76
Other current liabilities	53	47
Other, noncurrent liabilities	51	54
Total liabilities	104	101
Net assets	(13)	(25)
Commercial Renewables | VIE not primary beneficiary
Variable Interest Entities [Line Items]
Investments in equity method unconsolidated affiliates	507	508
Total Assets	507	508
Other current liabilities	4	4
Other, noncurrent liabilities	3	3
Total liabilities	7	7
Net assets	$ 500	$ 501

Variable Interest Entities (Rec

Variable Interest Entities (Receivables Sold) (Details) - VIE not primary beneficiary - CRC - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Duke Energy Ohio
Variable Interest Entities [Line Items]
Receivables sold	$ 313	$ 269
Less: Retained interests	131	79
Net receivables sold	182	190
Duke Energy Indiana
Variable Interest Entities [Line Items]
Receivables sold	466	328
Less: Retained interests	222	97
Net receivables sold	$ 244	$ 231

Variable Interest Entities (Sal

Variable Interest Entities (Sales and Cash Flows) (Details) - VIE not primary beneficiary - CRC - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Duke Energy Ohio
Sales
Receivables sold	$ 1,247	$ 1,004
Loss recognized on sale	7	5
Cash flows
Cash proceeds from receivables sold	1,188	1,029
Collection fees received	1
Return received on retained interests	3	2
Duke Energy Indiana
Sales
Receivables sold	1,617	1,382
Loss recognized on sale	8	6
Cash flows
Cash proceeds from receivables sold	1,484	1,401
Collection fees received	1
Return received on retained interests	$ 4	$ 3

Revenue (Remaining Performance

Revenue (Remaining Performance Obligations) (Details) $ in Millions	Jun. 30, 2022 USD ($)
Progress Energy
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 209
Progress Energy | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-07-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, expected timing of satisfaction, period	6 months
Revenue, remaining performance obligation, amount	$ 54
Progress Energy | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Revenue, remaining performance obligation, amount	$ 53
Progress Energy | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Revenue, remaining performance obligation, amount	$ 45
Progress Energy | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Revenue, remaining performance obligation, amount	$ 7
Progress Energy | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Revenue, remaining performance obligation, amount	$ 7
Progress Energy | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, expected timing of satisfaction, period
Revenue, remaining performance obligation, amount	$ 43
Duke Energy Progress
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 20
Duke Energy Progress | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-07-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, expected timing of satisfaction, period	6 months
Revenue, remaining performance obligation, amount	$ 4
Duke Energy Progress | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Revenue, remaining performance obligation, amount	$ 8
Duke Energy Progress | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Revenue, remaining performance obligation, amount	$ 8
Duke Energy Progress | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Duke Energy Progress | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Duke Energy Progress | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, expected timing of satisfaction, period
Duke Energy Florida
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 189
Duke Energy Florida | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-07-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, expected timing of satisfaction, period	6 months
Revenue, remaining performance obligation, amount	$ 50
Duke Energy Florida | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Revenue, remaining performance obligation, amount	$ 45
Duke Energy Florida | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Revenue, remaining performance obligation, amount	$ 37
Duke Energy Florida | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Revenue, remaining performance obligation, amount	$ 7
Duke Energy Florida | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Revenue, remaining performance obligation, amount	$ 7
Duke Energy Florida | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, expected timing of satisfaction, period
Revenue, remaining performance obligation, amount	$ 43
Duke Energy Indiana
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 73
Duke Energy Indiana | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-07-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, expected timing of satisfaction, period	6 months
Revenue, remaining performance obligation, amount	$ 2
Duke Energy Indiana | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Revenue, remaining performance obligation, amount	$ 11
Duke Energy Indiana | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Revenue, remaining performance obligation, amount	$ 16
Duke Energy Indiana | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Revenue, remaining performance obligation, amount	$ 17
Duke Energy Indiana | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Revenue, remaining performance obligation, amount	$ 15
Duke Energy Indiana | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, expected timing of satisfaction, period
Revenue, remaining performance obligation, amount	$ 12
Piedmont
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 553
Piedmont | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-07-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, expected timing of satisfaction, period	6 months
Revenue, remaining performance obligation, amount	$ 32
Piedmont | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Revenue, remaining performance obligation, amount	$ 64
Piedmont | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Revenue, remaining performance obligation, amount	$ 61
Piedmont | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Revenue, remaining performance obligation, amount	$ 60
Piedmont | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year
Revenue, remaining performance obligation, amount	$ 50
Piedmont | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, expected timing of satisfaction, period
Revenue, remaining performance obligation, amount	$ 286

Revenue (Remaining Performanc_2

Revenue (Remaining Performance Obligations Total) (Details) $ in Millions	Jun. 30, 2022 USD ($)
Progress Energy
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 209
Duke Energy Progress
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	20
Duke Energy Florida
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	189
Duke Energy Indiana
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	73
Piedmont
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 553

Revenue (Disaggregation of Reve

Revenue (Disaggregation of Revenue) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	$ 6,606	$ 5,667	$ 13,648	$ 11,761
Revenue from sources other than contracts with customers	79	91	169	147
Total operating revenues	6,685	5,758	13,817	11,908
Electric Utilities and Infrastructure
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	6,097	5,309	12,068	10,582
Total operating revenues	6,126	5,328	12,121	10,601
Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | Residential
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	2,625	2,336	5,392	4,798
Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | General
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	1,817	1,513	3,421	2,932
Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | Industrial
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	824	705	1,596	1,367
Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | Wholesale
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	629	521	1,255	1,025
Electric Utilities and Infrastructure | Other revenues
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	202	234	404	460
Gas Utilities and Infrastructure
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	424	299	1,437	1,060
Total operating revenues	430	305	1,439	1,057
Gas Utilities and Infrastructure | Gas Utilities and Infrastructure | Residential
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	197	158	769	618
Gas Utilities and Infrastructure | Gas Utilities and Infrastructure | Commercial
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	127	91	396	295
Gas Utilities and Infrastructure | Gas Utilities and Infrastructure | Industrial
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	34	30	91	80
Gas Utilities and Infrastructure | Other revenues
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	66	20	181	67
Commercial Renewables
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	77	53	128	107
Total operating revenues	121	119	242	238
Other
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers			15
Other
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	8	6		12
Duke Energy Carolinas
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	1,793	1,615	3,668	3,354
Revenue from sources other than contracts with customers	(12)	(5)	1	(28)
Total operating revenues	1,781	1,610	3,669	3,326
Duke Energy Carolinas | Electric Utilities and Infrastructure
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	1,793	1,615	3,668	3,354
Duke Energy Carolinas | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | Residential
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	736	683	1,567	1,476
Duke Energy Carolinas | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | General
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	566	498	1,110	1,000
Duke Energy Carolinas | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | Industrial
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	296	256	572	512
Duke Energy Carolinas | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | Wholesale
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	103	116	216	230
Duke Energy Carolinas | Electric Utilities and Infrastructure | Other revenues
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	92	62	203	136
Progress Energy
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	3,199	2,647	6,185	5,126
Revenue from sources other than contracts with customers	15	32	21	58
Total operating revenues	3,214	2,679	6,206	5,184
Progress Energy | Electric Utilities and Infrastructure
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	3,199	2,647	6,185	5,126
Progress Energy | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | Residential
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	1,400	1,216	2,768	2,378
Progress Energy | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | General
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	889	720	1,615	1,344
Progress Energy | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | Industrial
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	274	229	544	436
Progress Energy | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | Wholesale
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	389	331	800	657
Progress Energy | Electric Utilities and Infrastructure | Other revenues
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	247	151	458	311
Duke Energy Progress
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	1,575	1,324	3,206	2,710
Revenue from sources other than contracts with customers	6	25	7	40
Total operating revenues	1,581	1,349	3,213	2,750
Duke Energy Progress | Electric Utilities and Infrastructure
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	1,575	1,324	3,206	2,710
Duke Energy Progress | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | Residential
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	530	478	1,154	1,038
Duke Energy Progress | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | General
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	370	330	695	636
Duke Energy Progress | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | Industrial
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	184	160	378	305
Duke Energy Progress | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | Wholesale
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	281	285	630	577
Duke Energy Progress | Electric Utilities and Infrastructure | Other revenues
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	210	71	349	154
Duke Energy Florida
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	1,624	1,323	2,979	2,416
Revenue from sources other than contracts with customers	4	2	4	10
Total operating revenues	1,628	1,325	2,983	2,426
Duke Energy Florida | Electric Utilities and Infrastructure
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	1,624	1,323	2,979	2,416
Duke Energy Florida | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | Residential
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	870	738	1,614	1,340
Duke Energy Florida | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | General
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	519	390	920	708
Duke Energy Florida | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | Industrial
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	90	69	166	131
Duke Energy Florida | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | Wholesale
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	108	46	170	80
Duke Energy Florida | Electric Utilities and Infrastructure | Other revenues
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	37	80	109	157
Duke Energy Ohio
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	539	457	1,171	992
Revenue from sources other than contracts with customers	6	(1)	12	(4)
Total operating revenues	545	456	1,183	988
Duke Energy Ohio | Electric Utilities and Infrastructure
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	395	345	801	710
Duke Energy Ohio | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | Residential
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	196	171	407	366
Duke Energy Ohio | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | General
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	111	106	227	210
Duke Energy Ohio | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | Industrial
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	33	33	68	64
Duke Energy Ohio | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | Wholesale
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	35	13	58	26
Duke Energy Ohio | Electric Utilities and Infrastructure | Other revenues
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	20	22	41	44
Duke Energy Ohio | Gas Utilities and Infrastructure
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	144	112	370	282
Duke Energy Ohio | Gas Utilities and Infrastructure | Gas Utilities and Infrastructure | Residential
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	94	69	243	179
Duke Energy Ohio | Gas Utilities and Infrastructure | Gas Utilities and Infrastructure | Commercial
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	38	27	102	75
Duke Energy Ohio | Gas Utilities and Infrastructure | Gas Utilities and Infrastructure | Industrial
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	6	4	13	11
Duke Energy Ohio | Gas Utilities and Infrastructure | Other revenues
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	6	12	12	17
Duke Energy Indiana
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	892	730	1,699	1,467
Revenue from sources other than contracts with customers	26	5	41	13
Total operating revenues	918	735	1,740	1,480
Duke Energy Indiana | Electric Utilities and Infrastructure
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	892	730	1,699	1,467
Duke Energy Indiana | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | Residential
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	296	265	650	578
Duke Energy Indiana | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | General
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	251	190	469	379
Duke Energy Indiana | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | Industrial
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	220	189	412	356
Duke Energy Indiana | Electric Utilities and Infrastructure | Electric Utilities and Infrastructure | Wholesale
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	102	63	181	113
Duke Energy Indiana | Electric Utilities and Infrastructure | Other revenues
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	23	23	(13)	41
Piedmont
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	288	197	1,082	795
Revenue from sources other than contracts with customers	22	18	33	26
Total operating revenues	310	215	1,115	821
Piedmont | Gas Utilities and Infrastructure
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	288	197	1,082	795
Piedmont | Gas Utilities and Infrastructure | Gas Utilities and Infrastructure | Residential
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	103	88	526	439
Piedmont | Gas Utilities and Infrastructure | Gas Utilities and Infrastructure | Commercial
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	90	59	294	215
Piedmont | Gas Utilities and Infrastructure | Gas Utilities and Infrastructure | Industrial
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	28	27	78	70
Piedmont | Gas Utilities and Infrastructure | Gas Utilities and Infrastructure | Power Generation
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	23	24	47	46
Piedmont | Gas Utilities and Infrastructure | Other revenues
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	$ 44	$ (1)	$ 137	$ 25

Revenue (Reserve for Credit Los

Revenue (Reserve for Credit Losses for Trade and Other Receivables) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	$ 140	$ 147	$ 122	$ 146
Cumulative Change in Accounting Principle	136	123	136	123
Write-Offs	(31)	(5)	(54)	(26)
Credit Loss Expense	20	12	44	29
Other Adjustments	7	(31)	24	(26)
Ending balance	136	123	136	123
Duke Energy Carolinas
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	52	34	42	23
Cumulative Change in Accounting Principle	52	42	52	42
Write-Offs	(16)	1	(25)	(7)
Credit Loss Expense	8	6	13	16
Other Adjustments	8	1	22	10
Ending balance	52	42	52	42
Progress Energy
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	51	37	36	37
Cumulative Change in Accounting Principle	52	36	52	36
Write-Offs	(9)	(4)	(19)	(14)
Credit Loss Expense	7	6	19	13
Other Adjustments	3	(3)	16
Ending balance	52	36	52	36
Duke Energy Progress
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	31	23	21	23
Cumulative Change in Accounting Principle	31	21	31	21
Write-Offs	(5)	(3)	(7)	(8)
Credit Loss Expense	2	4	6	6
Other Adjustments	3	(3)	11
Ending balance	31	21	31	21
Duke Energy Florida
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	21	15	16	14
Cumulative Change in Accounting Principle	21	16	21	16
Write-Offs	(5)	(1)	(13)	(6)
Credit Loss Expense	5	2	13	7
Other Adjustments			5	1
Ending balance	21	16	21	16
Duke Energy Ohio
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	4	4	4	4
Cumulative Change in Accounting Principle	4	4	4	4
Ending balance	4	4	4	4
Duke Energy Indiana
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	3	3	3	3
Cumulative Change in Accounting Principle	3	3	3	3
Ending balance	3	3	3	3
Piedmont
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	17	14	15	12
Cumulative Change in Accounting Principle	15	13	15	13
Write-Offs	(5)	(2)	(6)	(3)
Credit Loss Expense	3	1	6	4
Ending balance	$ 15	$ 13	$ 15	$ 13

Revenue (Aging of Trade Receiva

Revenue (Aging of Trade Receivables) (Details) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Financing Receivable, Past Due [Line Items]
Unbilled Receivables	$ 1,175	$ 964
Trade and Other Receivables, not past due	2,202	2,104
Deferred Payment Arrangements	148	115
Trade and Other Receivables	4,064	3,732
30-60 days
Financing Receivable, Past Due [Line Items]
Trade and Other Receivables	177	212
60-90 days
Financing Receivable, Past Due [Line Items]
Trade and Other Receivables	88	88
90 days
Financing Receivable, Past Due [Line Items]
Trade and Other Receivables	274	249
Duke Energy Carolinas
Financing Receivable, Past Due [Line Items]
Unbilled Receivables	412	316
Trade and Other Receivables, not past due	592	595
Deferred Payment Arrangements	62	55
Trade and Other Receivables	1,214	1,186
Duke Energy Carolinas | 30-60 days
Financing Receivable, Past Due [Line Items]
Trade and Other Receivables	52	77
Duke Energy Carolinas | 60-90 days
Financing Receivable, Past Due [Line Items]
Trade and Other Receivables	16	37
Duke Energy Carolinas | 90 days
Financing Receivable, Past Due [Line Items]
Trade and Other Receivables	80	106
Progress Energy
Financing Receivable, Past Due [Line Items]
Unbilled Receivables	359	266
Trade and Other Receivables, not past due	946	800
Deferred Payment Arrangements	61	45
Trade and Other Receivables	1,596	1,289
Progress Energy | 30-60 days
Financing Receivable, Past Due [Line Items]
Trade and Other Receivables	90	72
Progress Energy | 60-90 days
Financing Receivable, Past Due [Line Items]
Trade and Other Receivables	44	41
Progress Energy | 90 days
Financing Receivable, Past Due [Line Items]
Trade and Other Receivables	96	65
Duke Energy Progress
Financing Receivable, Past Due [Line Items]
Unbilled Receivables	205	193
Trade and Other Receivables, not past due	451	405
Deferred Payment Arrangements	36	22
Trade and Other Receivables	799	722
Duke Energy Progress | 30-60 days
Financing Receivable, Past Due [Line Items]
Trade and Other Receivables	41	44
Duke Energy Progress | 60-90 days
Financing Receivable, Past Due [Line Items]
Trade and Other Receivables	20	21
Duke Energy Progress | 90 days
Financing Receivable, Past Due [Line Items]
Trade and Other Receivables	46	37
Duke Energy Florida
Financing Receivable, Past Due [Line Items]
Unbilled Receivables	154	73
Trade and Other Receivables, not past due	492	393
Deferred Payment Arrangements	25	23
Trade and Other Receivables	794	565
Duke Energy Florida | 30-60 days
Financing Receivable, Past Due [Line Items]
Trade and Other Receivables	49	28
Duke Energy Florida | 60-90 days
Financing Receivable, Past Due [Line Items]
Trade and Other Receivables	24	20
Duke Energy Florida | 90 days
Financing Receivable, Past Due [Line Items]
Trade and Other Receivables	50	28
Duke Energy Ohio
Financing Receivable, Past Due [Line Items]
Unbilled Receivables	8	4
Trade and Other Receivables, not past due	32	42
Deferred Payment Arrangements	1	2
Trade and Other Receivables	87	100
Duke Energy Ohio | CRC
Financing Receivable, Past Due [Line Items]
Unbilled Receivables	102	82
Duke Energy Ohio | 30-60 days
Financing Receivable, Past Due [Line Items]
Trade and Other Receivables	2	4
Duke Energy Ohio | 60-90 days
Financing Receivable, Past Due [Line Items]
Trade and Other Receivables	1	1
Duke Energy Ohio | 90 days
Financing Receivable, Past Due [Line Items]
Trade and Other Receivables	43	47
Duke Energy Indiana
Financing Receivable, Past Due [Line Items]
Unbilled Receivables	24	27
Trade and Other Receivables, not past due	41	51
Trade and Other Receivables	88	103
Duke Energy Indiana | CRC
Financing Receivable, Past Due [Line Items]
Unbilled Receivables	199	121
Duke Energy Indiana | 30-60 days
Financing Receivable, Past Due [Line Items]
Trade and Other Receivables	3	13
Duke Energy Indiana | 60-90 days
Financing Receivable, Past Due [Line Items]
Trade and Other Receivables	6	1
Duke Energy Indiana | 90 days
Financing Receivable, Past Due [Line Items]
Trade and Other Receivables	14	11
Piedmont
Financing Receivable, Past Due [Line Items]
Unbilled Receivables	10	106
Trade and Other Receivables, not past due	127	202
Deferred Payment Arrangements	4	4
Trade and Other Receivables	165	333
Piedmont | 30-60 days
Financing Receivable, Past Due [Line Items]
Trade and Other Receivables	8	12
Piedmont | 60-90 days
Financing Receivable, Past Due [Line Items]
Trade and Other Receivables	5	2
Piedmont | 90 days
Financing Receivable, Past Due [Line Items]
Trade and Other Receivables	$ 11	$ 7

Stockholders' Equity (Earnings

Stockholders' Equity (Earnings Per Share Data) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Class of Stock [Line Items]
Net income available to Duke Energy common stockholders	$ 893	$ 751	$ 1,711	$ 1,704
Accumulated preferred stock dividends adjustment	(12)	(12)
Less: Impact of participating securities	0	1	1	1
Income from continuing operations available to Duke Energy common stockholders	$ 881	$ 738	$ 1,710	$ 1,703
Weighted average common shares outstanding – basic (in shares)	770	769	770	769
Weighted average common shares outstanding – diluted (in shares)	770	769	770	769
EPS available to Duke Energy common stockholders
Basic (in usd per share)	$ 1.14	$ 0.96	$ 2.22	$ 2.21
Diluted (in usd per share)	$ 1.14	$ 0.96	$ 2.22	$ 2.21
Potentially dilutive items excluded from the calculation (in shares)	2	2	2	2
Common Stock
EPS available to Duke Energy common stockholders
Dividends declared per common share (in usd per share)	$ 0.985	$ 0.965	$ 1.970	$ 1.930
Preferred stock, Series A
EPS available to Duke Energy common stockholders
Dividends declared on preferred stock per depositary share (in usd per share)	0.359	$ 0.359	$ 0.719	0.719
Cumulative dividend rate per annum			5.75%
Liquidation preference per share (in usd per share)	25		$ 25
Preferred stock, Series B
EPS available to Duke Energy common stockholders
Dividends declared on preferred stock per depositary share (in usd per share)			$ 24.375	$ 24.375
Cumulative dividend rate per annum			4.875%
Liquidation preference per share (in usd per share)	$ 1,000		$ 1,000

Employee Benefit Plans (Compone

Employee Benefit Plans (Components of Net Periodic Pension Costs) (Details) - Qualified Pension Plans - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	$ 41	$ 44	$ 81	$ 88
Interest cost on projected benefit obligation	59	55	117	110
Expected return on plan assets	(141)	(140)	(281)	(279)
Amortization of actuarial loss	23	34	47	67
Amortization of prior service credit	(4)	(8)	(9)	(15)
Amortization of settlement charges	2	2	4	4
Net periodic pension costs	(20)	(13)	(41)	(25)
Duke Energy Carolinas
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	14	14	26	28
Interest cost on projected benefit obligation	13	12	27	25
Expected return on plan assets	(38)	(35)	(76)	(70)
Amortization of actuarial loss	5	8	10	15
Amortization of prior service credit	(1)	(2)	(2)	(4)
Amortization of settlement charges	2	2	3	3
Net periodic pension costs	(5)	(1)	(12)	(3)
Progress Energy
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	11	12	23	25
Interest cost on projected benefit obligation	18	18	36	35
Expected return on plan assets	(47)	(47)	(93)	(94)
Amortization of actuarial loss	7	9	13	19
Amortization of prior service credit				(1)
Amortization of settlement charges			1	1
Net periodic pension costs	(11)	(8)	(20)	(15)
Duke Energy Progress
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	7	8	14	15
Interest cost on projected benefit obligation	8	8	16	15
Expected return on plan assets	(22)	(21)	(44)	(42)
Amortization of actuarial loss	4	4	7	9
Amortization of prior service credit		(1)		(1)
Amortization of settlement charges	1	1	1	1
Net periodic pension costs	(2)	(1)	(6)	(3)
Duke Energy Florida
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	6	6	10	11
Interest cost on projected benefit obligation	10	9	20	19
Expected return on plan assets	(24)	(25)	(48)	(51)
Amortization of actuarial loss	3	5	6	10
Net periodic pension costs	(5)	(5)	(12)	(11)
Duke Energy Ohio
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	1	1	2	2
Interest cost on projected benefit obligation	3	4	6	7
Expected return on plan assets	(6)	(7)	(11)	(14)
Amortization of actuarial loss	1	1	2	3
Net periodic pension costs	(1)	(1)	(1)	(2)
Duke Energy Indiana
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	2	3	4	5
Interest cost on projected benefit obligation	5	4	10	9
Expected return on plan assets	(10)	(10)	(19)	(20)
Amortization of actuarial loss	3	4	5	7
Amortization of prior service credit	(1)	(1)	(1)	(1)
Net periodic pension costs	(1)		(1)
Piedmont
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	2	2	3	3
Interest cost on projected benefit obligation	2	2	4	4
Expected return on plan assets	(6)	(5)	(12)	(10)
Amortization of actuarial loss	1	3	3	5
Amortization of prior service credit	(2)	(4)	(4)	(5)
Net periodic pension costs	$ (3)	$ (2)	$ (6)	$ (3)

Income Taxes (Effective Tax Rat

Income Taxes (Effective Tax Rates) (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Reconciliation of Income Tax Expense at the U.S. Federal Statutory Tax Rate to the Actual Tax Expense from Continuing Operations [Abstract]
Effective tax rate	8%	4.90%	3.60%	6.80%
Duke Energy Carolinas
Reconciliation of Income Tax Expense at the U.S. Federal Statutory Tax Rate to the Actual Tax Expense from Continuing Operations [Abstract]
Effective tax rate	7.30%	0.40%	7.40%	4.30%
Progress Energy
Reconciliation of Income Tax Expense at the U.S. Federal Statutory Tax Rate to the Actual Tax Expense from Continuing Operations [Abstract]
Effective tax rate	16.80%	8.30%	16.40%	10.20%
Duke Energy Progress
Reconciliation of Income Tax Expense at the U.S. Federal Statutory Tax Rate to the Actual Tax Expense from Continuing Operations [Abstract]
Effective tax rate	13.80%	2.70%	13.90%	5.60%
Duke Energy Florida
Reconciliation of Income Tax Expense at the U.S. Federal Statutory Tax Rate to the Actual Tax Expense from Continuing Operations [Abstract]
Effective tax rate	20.20%	19%	20.10%	19.10%
Duke Energy Ohio
Reconciliation of Income Tax Expense at the U.S. Federal Statutory Tax Rate to the Actual Tax Expense from Continuing Operations [Abstract]
Effective tax rate	13.80%	22%	(54.70%)	16.10%
Duke Energy Indiana
Reconciliation of Income Tax Expense at the U.S. Federal Statutory Tax Rate to the Actual Tax Expense from Continuing Operations [Abstract]
Effective tax rate	8.60%	15.60%	(48.90%)	16.70%
Piedmont
Reconciliation of Income Tax Expense at the U.S. Federal Statutory Tax Rate to the Actual Tax Expense from Continuing Operations [Abstract]
Effective tax rate	85.70%	33.30%	11.40%	10.80%