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Regulatory Matters (Tables)

12 Months Ended

Dec. 31, 2025

Public Utilities, General Disclosures [Line Items]

Schedule of Regulatory Assets

The following tables present the regulatory assets and liabilities recorded on the Consolidated Balance Sheets of Duke Energy and Progress Energy. See separate tables below for balances by individual registrant.

			Duke Energy												Progress Energy
			December 31,												December 31,
(in millions)			2025						2024						2025						2024
Regulatory Assets
AROs – coal ash			$	3,670					$	3,384					$	1,544					$	1,335
Accrued pension and OPEB			2,281						2,524						744						828
Storm cost deferrals			73						1,951						49						1,238
Storm cost securitized balance, net			2,567						1,023						1,239						822
AROs – nuclear and other			602						948						564						905
Nuclear asset securitized balance, net			717						771						717						771
Debt fair value adjustment			665						719						—						—
COR regulatory asset			860						646						746						571
Deferred fuel and purchased power			619						588						228						282
Hedge costs deferrals			365						352						135						126
PISCC and deferred operating expenses			291						331						37						37
Retired generation facilities			252						337						176						202
Customer connect project			234						257						107						116
Grid deferral			257						255						63						54
Incremental COVID-19 expenses			202						231						94						89
Vacation accrual			240						228						45						43
Deferred asset – Lee and Harris COLA			177						215						4						10
Advanced metering infrastructure (AMI)			162						204						48						70
Demand side management (DSM) / Energy efficiency (EE)			335						199						247						199
CEP deferral			200						195						—						—
NCEMPA deferrals			202						179						202						179
Decoupling			118						162						27						32
Nuclear deferral			117						134						53						53
Deferred pipeline integrity costs			117						129						—						—
COR settlement			106						110						28						29
Derivatives – natural gas supply contracts			72						94						—						—
Deferred coal ash handling system costs			60						77						13						17
Qualifying facility contract buyouts			55						62						55						62
Network Integration Transmission Services deferral			31						31						—						—
Transmission expansion obligation			30						31						—						—
East Bend deferrals			20						24						—						—
Propane caverns			22						24						—						—
Deferred purchased gas costs			26						9						—						—
Other			568						535						238						195
Total regulatory assets			16,313						16,959						7,403						8,265
Less: Current portion			1,934						2,739						753						1,647
Total noncurrent regulatory assets			$	14,379					$	14,220					$	6,650					$	6,618
Regulatory Liabilities
COR regulatory liability			$	5,336					$	5,302					$	3,084					$	2,984
Net regulatory liability related to income taxes			4,748						5,356						1,741						1,882
AROs – nuclear and other			2,982						2,289						—						—
Deferred nuclear PTC			1,377						676						197						95
Hedge cost deferrals			582						583						248						281
Renewable energy credits			267						241						146						139
Accrued pension and OPEB			184						232						11						12
Deferred fuel and purchased power			28						223						28						94
Storm cost recovery			262						6						90						6
DSM / EE			26						69						—						—
Storm reserve			132						—						132						—
Nuclear insurance distributions reserve			163						152						—						—
Other			866						813						274						287
Total regulatory liabilities			16,953						15,942						5,951						5,780
Less: Current portion			1,271						1,421						350						522
Total noncurrent regulatory liabilities			$	15,682					$	14,521					$	5,601					$	5,258

Schedule of Regulatory Liabilities

The following tables present the regulatory assets and liabilities recorded on the Consolidated Balance Sheets of Duke Energy and Progress Energy. See separate tables below for balances by individual registrant.

			Duke Energy												Progress Energy
			December 31,												December 31,
(in millions)			2025						2024						2025						2024
Regulatory Assets
AROs – coal ash			$	3,670					$	3,384					$	1,544					$	1,335
Accrued pension and OPEB			2,281						2,524						744						828
Storm cost deferrals			73						1,951						49						1,238
Storm cost securitized balance, net			2,567						1,023						1,239						822
AROs – nuclear and other			602						948						564						905
Nuclear asset securitized balance, net			717						771						717						771
Debt fair value adjustment			665						719						—						—
COR regulatory asset			860						646						746						571
Deferred fuel and purchased power			619						588						228						282
Hedge costs deferrals			365						352						135						126
PISCC and deferred operating expenses			291						331						37						37
Retired generation facilities			252						337						176						202
Customer connect project			234						257						107						116
Grid deferral			257						255						63						54
Incremental COVID-19 expenses			202						231						94						89
Vacation accrual			240						228						45						43
Deferred asset – Lee and Harris COLA			177						215						4						10
Advanced metering infrastructure (AMI)			162						204						48						70
Demand side management (DSM) / Energy efficiency (EE)			335						199						247						199
CEP deferral			200						195						—						—
NCEMPA deferrals			202						179						202						179
Decoupling			118						162						27						32
Nuclear deferral			117						134						53						53
Deferred pipeline integrity costs			117						129						—						—
COR settlement			106						110						28						29
Derivatives – natural gas supply contracts			72						94						—						—
Deferred coal ash handling system costs			60						77						13						17
Qualifying facility contract buyouts			55						62						55						62
Network Integration Transmission Services deferral			31						31						—						—
Transmission expansion obligation			30						31						—						—
East Bend deferrals			20						24						—						—
Propane caverns			22						24						—						—
Deferred purchased gas costs			26						9						—						—
Other			568						535						238						195
Total regulatory assets			16,313						16,959						7,403						8,265
Less: Current portion			1,934						2,739						753						1,647
Total noncurrent regulatory assets			$	14,379					$	14,220					$	6,650					$	6,618
Regulatory Liabilities
COR regulatory liability			$	5,336					$	5,302					$	3,084					$	2,984
Net regulatory liability related to income taxes			4,748						5,356						1,741						1,882
AROs – nuclear and other			2,982						2,289						—						—
Deferred nuclear PTC			1,377						676						197						95
Hedge cost deferrals			582						583						248						281
Renewable energy credits			267						241						146						139
Accrued pension and OPEB			184						232						11						12
Deferred fuel and purchased power			28						223						28						94
Storm cost recovery			262						6						90						6
DSM / EE			26						69						—						—
Storm reserve			132						—						132						—
Nuclear insurance distributions reserve			163						152						—						—
Other			866						813						274						287
Total regulatory liabilities			16,953						15,942						5,951						5,780
Less: Current portion			1,271						1,421						350						522
Total noncurrent regulatory liabilities			$	15,682					$	14,521					$	5,601					$	5,258

Schedule of Potential Plant Retirements

Total Storm Registration Costs Across Subsidiary Registrants

Winter Storm Fern

In late January 2026, Winter Storm Fern moved across the eastern U.S and impacted all of Duke Energy's service territories, with damage primarily occurring in the Duke Energy Carolinas and Duke Energy Progress territories in North Carolina and South Carolina. Approximately 200,000 customers were impacted across Duke Energy's system. Total storm restoration costs, including capital expenditures, for Duke Energy are currently estimated to be in the range of $250 million to $350 million (which includes $150 million to $225 million for Duke Energy Carolinas and $100 million to $125 million for Duke Energy Progress). Incremental storm restoration costs related to operation and maintenance activities in excess of amounts in base rates will be deferred as regulatory assets and reviewed for recovery in future regulatory proceedings or charged to storm reserves, where applicable. These estimates could change as additional information is received on actual costs incurred for preparation and restoration activities.

Duke Energy Carolinas and Duke Energy Progress

Duke Energy Carolinas

Public Utilities, General Disclosures [Line Items]

Schedule of Regulatory Assets

The following tables present the regulatory assets and liabilities recorded on Duke Energy Carolinas' Consolidated Balance Sheets.

			December 31,									Earns/Pays			Recovery/Refund
(in millions)			2025			2024						a Return			Period Ends
Regulatory Assets(a)
AROs – coal ash			$	1,506		$	1,481					Yes			(b)
Storm cost deferrals			—			691						Yes			(b)
Accrued pension and OPEB(c)			592			668						Yes			(g)
Deferred fuel and purchased power			306			298						(e)			2028
Deferred asset – Lee COLA			173			205									(b)
Hedge costs deferrals			199			202									(b)
Storm cost securitized balance, net			1,328			201									2046
Grid deferral(c)			194			201						Yes			(b)
Incremental COVID-19 expenses(c)			104			137						Yes			(b)
AMI(c)			102			114						Yes			(b)
Vacation accrual			91			86									2026
Nuclear deferral			64			81									2027
COR settlement			78			81						Yes			(b)
Deferred coal ash handling system costs(c)			47			60						Yes			(b)
Customer connect project(c)			48			54						Yes			(b)
Retired generation facilities(c)			56			110						Yes			(b)
DSM/EE			86			—						Yes			(h)
PISCC and deferred operating expenses			39			42						Yes			(b)
Decoupling			45			24						Yes			(b)
Other			174			148									(b)
Total regulatory assets			5,232			4,884
Less: Current portion			730			685
Total noncurrent regulatory assets			$	4,502		$	4,199
Regulatory Liabilities(a)
AROs – nuclear and other			$	2,982		2,289									(b)
Net regulatory liability related to income taxes(d)			1,608			$	1,951					Yes			(b)
COR regulatory liability(c)			1,383			1,479									(f)
Deferred nuclear PTC			1,180			581						Yes			(b)
Hedge cost deferrals			228			199									(b)
Deferred fuel and purchased power			—			108						(e)
Renewable energy credits			121			102						Yes			(b)
Storm cost recovery			172			—						Yes			(b)
DSM / EE(c)			—			53						Yes			(h)
Accrued pension and OPEB(c)			18			35						Yes			(g)
Nuclear insurance distributions reserve(c)			163			152						Yes			(b)
Other			323			261									(b)
Total regulatory liabilities			8,178			7,210
Less: Current portion			569			618
Total noncurrent regulatory liabilities			$	7,609		$	6,592

(a)    Regulatory assets and liabilities are excluded from rate base unless otherwise noted.

(b)    The expected recovery or refund period varies or has not been determined.

(c)     Included in rate base.

(d)    Includes regulatory liabilities related to the change in the federal tax rate as a result of the Tax Act and the change in the North Carolina tax rate. Portions are included in rate base.

(e)    Pays interest on over-recovered costs in North Carolina. Includes certain purchased power costs in North Carolina and South Carolina and costs of distributed energy in South Carolina. The asset balance principally relates to North Carolina costs while the liability balance relates to South Carolina.

(f)    Recovered over the life of the associated assets.

(g)    Recovered primarily over the average remaining service periods or life expectancies of employees covered by the benefit plans. See Note 23 for additional detail.

(h)    Includes incentives on DSM/EE investments and is recovered or refunded through an annual rider mechanism.

Schedule of Regulatory Liabilities

The following tables present the regulatory assets and liabilities recorded on Duke Energy Carolinas' Consolidated Balance Sheets.

			December 31,									Earns/Pays			Recovery/Refund
(in millions)			2025			2024						a Return			Period Ends
Regulatory Assets(a)
AROs – coal ash			$	1,506		$	1,481					Yes			(b)
Storm cost deferrals			—			691						Yes			(b)
Accrued pension and OPEB(c)			592			668						Yes			(g)
Deferred fuel and purchased power			306			298						(e)			2028
Deferred asset – Lee COLA			173			205									(b)
Hedge costs deferrals			199			202									(b)
Storm cost securitized balance, net			1,328			201									2046
Grid deferral(c)			194			201						Yes			(b)
Incremental COVID-19 expenses(c)			104			137						Yes			(b)
AMI(c)			102			114						Yes			(b)
Vacation accrual			91			86									2026
Nuclear deferral			64			81									2027
COR settlement			78			81						Yes			(b)
Deferred coal ash handling system costs(c)			47			60						Yes			(b)
Customer connect project(c)			48			54						Yes			(b)
Retired generation facilities(c)			56			110						Yes			(b)
DSM/EE			86			—						Yes			(h)
PISCC and deferred operating expenses			39			42						Yes			(b)
Decoupling			45			24						Yes			(b)
Other			174			148									(b)
Total regulatory assets			5,232			4,884
Less: Current portion			730			685
Total noncurrent regulatory assets			$	4,502		$	4,199
Regulatory Liabilities(a)
AROs – nuclear and other			$	2,982		2,289									(b)
Net regulatory liability related to income taxes(d)			1,608			$	1,951					Yes			(b)
COR regulatory liability(c)			1,383			1,479									(f)
Deferred nuclear PTC			1,180			581						Yes			(b)
Hedge cost deferrals			228			199									(b)
Deferred fuel and purchased power			—			108						(e)
Renewable energy credits			121			102						Yes			(b)
Storm cost recovery			172			—						Yes			(b)
DSM / EE(c)			—			53						Yes			(h)
Accrued pension and OPEB(c)			18			35						Yes			(g)
Nuclear insurance distributions reserve(c)			163			152						Yes			(b)
Other			323			261									(b)
Total regulatory liabilities			8,178			7,210
Less: Current portion			569			618
Total noncurrent regulatory liabilities			$	7,609		$	6,592

(a)    Regulatory assets and liabilities are excluded from rate base unless otherwise noted.

(b)    The expected recovery or refund period varies or has not been determined.

(c)     Included in rate base.

(d)    Includes regulatory liabilities related to the change in the federal tax rate as a result of the Tax Act and the change in the North Carolina tax rate. Portions are included in rate base.

(e)    Pays interest on over-recovered costs in North Carolina. Includes certain purchased power costs in North Carolina and South Carolina and costs of distributed energy in South Carolina. The asset balance principally relates to North Carolina costs while the liability balance relates to South Carolina.

(f)    Recovered over the life of the associated assets.

(g)    Recovered primarily over the average remaining service periods or life expectancies of employees covered by the benefit plans. See Note 23 for additional detail.

(h)    Includes incentives on DSM/EE investments and is recovered or refunded through an annual rider mechanism.

Duke Energy Progress

Public Utilities, General Disclosures [Line Items]

Schedule of Regulatory Assets

The following tables present the regulatory assets and liabilities recorded on Duke Energy Progress' Consolidated Balance Sheets.

			December 31,									Earns/Pays			Recovery/Refund
(in millions)			2025			2024						a Return			Period Ends
Regulatory Assets(a)
AROs – coal ash			$	1,531		$	1,322					Yes			(b)
AROs – nuclear and other			554			900									(c)
Storm cost securitized balance, net			1,239			822									2046
Accrued pension and OPEB(d)			396			439						Yes			(i)
Deferred fuel and purchased power			227			277						(e)			2028
Storm cost deferrals			20			276						Yes			(b)
DSM/EE(d)			229			188						Yes			(g)
NCEMPA deferrals(d)			202			179						(f)			2042
Retired generation facilities(d)			87			108						Yes			(b)
Incremental COVID-19 expenses(d)			94			89									(b)
Hedge costs deferrals			87			85									(b)
AMI(d)			39			54						Yes			(b)
Grid deferral(d)			63			54						Yes			(b)
Nuclear deferral			53			53									2027
Customer connect project(d)			42			45						Yes			(b)
Vacation accrual			45			43									2026
PISCC and deferred operating expenses			37			37						Yes			2054
Decoupling			27			32						Yes			(b)
COR settlement			28			29						Yes			(b)
Deferred coal ash handling system costs(d)			13			17						Yes			(b)
Deferred asset – Harris COLA			4			10									(b)
Other			178			122									(b)
Total regulatory assets			5,195			5,181
Less: Current portion			652			626
Total noncurrent regulatory assets			$	4,543		$	4,555
Regulatory Liabilities(a)
COR regulatory liability(d)			$	3,084		2,984									(h)
Net regulatory liability related to income taxes(j)			1,206			$	1,318					Yes			(b)
Hedge cost deferrals			126			151									(b)
Renewable energy credits			146			139						Yes			(b)
Storm cost recovery			90			6						Yes			(b)
Deferred nuclear PTC			197			95						Yes			(b)
Accrued pension and OPEB(d)			11			12						Yes			(i)
Deferred fuel and purchased power			10			10						(e)			2028
Other			211			203									(b)
Total regulatory liabilities			5,081			4,918
Less: Current portion			274			348
Total noncurrent regulatory liabilities			$	4,807		$	4,570

(a)    Regulatory assets and liabilities are excluded from rate base unless otherwise noted.

(b)    The expected recovery or refund period varies or has not been determined.

(c)    Recovery period for costs related to nuclear facilities runs through the decommissioning period of each unit.

(d)    Included in rate base.

(e)    Pays interest on over-recovered costs in North Carolina. Includes certain purchased power costs in North Carolina and South Carolina and costs of distributed energy in South Carolina. The asset balance principally relates to North Carolina costs while the liability balance relates to South Carolina.

(f)    South Carolina retail allocated costs are earning a return.

(g)    Includes incentives on DSM/EE investments and is recovered through an annual rider mechanism.

(h)    Recovered over the life of the associated assets.

(i)    Recovered primarily over the average remaining service periods or life expectancies of employees covered by the benefit plans. See Note 23 for additional detail.

(j)    Includes regulatory liabilities related to the change in the federal tax rate as a result of the Tax Act and the change in the North Carolina tax rate. Portions are included in rate base.

Schedule of Regulatory Liabilities

The following tables present the regulatory assets and liabilities recorded on Duke Energy Progress' Consolidated Balance Sheets.

			December 31,									Earns/Pays			Recovery/Refund
(in millions)			2025			2024						a Return			Period Ends
Regulatory Assets(a)
AROs – coal ash			$	1,531		$	1,322					Yes			(b)
AROs – nuclear and other			554			900									(c)
Storm cost securitized balance, net			1,239			822									2046
Accrued pension and OPEB(d)			396			439						Yes			(i)
Deferred fuel and purchased power			227			277						(e)			2028
Storm cost deferrals			20			276						Yes			(b)
DSM/EE(d)			229			188						Yes			(g)
NCEMPA deferrals(d)			202			179						(f)			2042
Retired generation facilities(d)			87			108						Yes			(b)
Incremental COVID-19 expenses(d)			94			89									(b)
Hedge costs deferrals			87			85									(b)
AMI(d)			39			54						Yes			(b)
Grid deferral(d)			63			54						Yes			(b)
Nuclear deferral			53			53									2027
Customer connect project(d)			42			45						Yes			(b)
Vacation accrual			45			43									2026
PISCC and deferred operating expenses			37			37						Yes			2054
Decoupling			27			32						Yes			(b)
COR settlement			28			29						Yes			(b)
Deferred coal ash handling system costs(d)			13			17						Yes			(b)
Deferred asset – Harris COLA			4			10									(b)
Other			178			122									(b)
Total regulatory assets			5,195			5,181
Less: Current portion			652			626
Total noncurrent regulatory assets			$	4,543		$	4,555
Regulatory Liabilities(a)
COR regulatory liability(d)			$	3,084		2,984									(h)
Net regulatory liability related to income taxes(j)			1,206			$	1,318					Yes			(b)
Hedge cost deferrals			126			151									(b)
Renewable energy credits			146			139						Yes			(b)
Storm cost recovery			90			6						Yes			(b)
Deferred nuclear PTC			197			95						Yes			(b)
Accrued pension and OPEB(d)			11			12						Yes			(i)
Deferred fuel and purchased power			10			10						(e)			2028
Other			211			203									(b)
Total regulatory liabilities			5,081			4,918
Less: Current portion			274			348
Total noncurrent regulatory liabilities			$	4,807		$	4,570

(a)    Regulatory assets and liabilities are excluded from rate base unless otherwise noted.

(b)    The expected recovery or refund period varies or has not been determined.

(c)    Recovery period for costs related to nuclear facilities runs through the decommissioning period of each unit.

(d)    Included in rate base.

(e)    Pays interest on over-recovered costs in North Carolina. Includes certain purchased power costs in North Carolina and South Carolina and costs of distributed energy in South Carolina. The asset balance principally relates to North Carolina costs while the liability balance relates to South Carolina.

(f)    South Carolina retail allocated costs are earning a return.

(g)    Includes incentives on DSM/EE investments and is recovered through an annual rider mechanism.

(h)    Recovered over the life of the associated assets.

(i)    Recovered primarily over the average remaining service periods or life expectancies of employees covered by the benefit plans. See Note 23 for additional detail.

(j)    Includes regulatory liabilities related to the change in the federal tax rate as a result of the Tax Act and the change in the North Carolina tax rate. Portions are included in rate base.

Duke Energy Florida

Public Utilities, General Disclosures [Line Items]

Schedule of Regulatory Assets

The following tables present the regulatory assets and liabilities recorded on Duke Energy Florida's Consolidated Balance Sheets.

			December 31,									Earns/Pays			Recovery/Refund
(in millions)			2025			2024						a Return			Period Ends
Regulatory Assets(a)
Storm cost deferrals			$	29		962						(e)			(b)
Nuclear asset securitized balance, net			717			771									2036
COR regulatory asset			746			571						Yes			(b)
Accrued pension and OPEB(c)			348			389						Yes			(f)
Retired generation facilities(c)			89			94						Yes			2044
Customer connect project(c)			65			71						Yes			2037
Qualifying facility contract buyouts(c)			55			62						Yes			2034
Hedge costs deferrals(c)			48			41						Yes			(b)
AMI(c)			9			16						Yes			2032
AROs – coal ash			13			13									(b)
AROs – nuclear and other			10			5									(b)
Other			79			91						(d)			(b)
Total regulatory assets			2,208			3,086
Less: Current portion			102			1,022
Total noncurrent regulatory assets			$	2,106		$	2,064
Regulatory Liabilities(a)
Net regulatory liability related to income taxes(c)			$	535		$	564								(b)
Hedge cost deferrals(c)			122			130						Yes			(b)
Deferred fuel and purchased power			18			84						(e)			2026
Storm reserve(c)			132			—						Yes			(b)
Other			63			84						(d)			(b)
Total regulatory liabilities			870			862
Less: Current portion			76			174
Total noncurrent regulatory liabilities			$	794		$	688

(a)    Regulatory assets and liabilities are excluded from rate base unless otherwise noted.

(b)    The expected recovery or refund period varies or has not been determined.

(c)    Included in rate base.

(d)    Certain costs earn/pay a return.

(e)    Earns commercial paper rate.

(f)    Recovered primarily over the average remaining service periods or life expectancies of employees covered by the benefit plans. See Note 23 for additional detail.

Schedule of Regulatory Liabilities

The following tables present the regulatory assets and liabilities recorded on Duke Energy Florida's Consolidated Balance Sheets.

			December 31,									Earns/Pays			Recovery/Refund
(in millions)			2025			2024						a Return			Period Ends
Regulatory Assets(a)
Storm cost deferrals			$	29		962						(e)			(b)
Nuclear asset securitized balance, net			717			771									2036
COR regulatory asset			746			571						Yes			(b)
Accrued pension and OPEB(c)			348			389						Yes			(f)
Retired generation facilities(c)			89			94						Yes			2044
Customer connect project(c)			65			71						Yes			2037
Qualifying facility contract buyouts(c)			55			62						Yes			2034
Hedge costs deferrals(c)			48			41						Yes			(b)
AMI(c)			9			16						Yes			2032
AROs – coal ash			13			13									(b)
AROs – nuclear and other			10			5									(b)
Other			79			91						(d)			(b)
Total regulatory assets			2,208			3,086
Less: Current portion			102			1,022
Total noncurrent regulatory assets			$	2,106		$	2,064
Regulatory Liabilities(a)
Net regulatory liability related to income taxes(c)			$	535		$	564								(b)
Hedge cost deferrals(c)			122			130						Yes			(b)
Deferred fuel and purchased power			18			84						(e)			2026
Storm reserve(c)			132			—						Yes			(b)
Other			63			84						(d)			(b)
Total regulatory liabilities			870			862
Less: Current portion			76			174
Total noncurrent regulatory liabilities			$	794		$	688

(a)    Regulatory assets and liabilities are excluded from rate base unless otherwise noted.

(b)    The expected recovery or refund period varies or has not been determined.

(c)    Included in rate base.

(d)    Certain costs earn/pay a return.

(e)    Earns commercial paper rate.

(f)    Recovered primarily over the average remaining service periods or life expectancies of employees covered by the benefit plans. See Note 23 for additional detail.

Duke Energy Ohio

Public Utilities, General Disclosures [Line Items]

Schedule of Regulatory Assets

The following tables present the regulatory assets and liabilities recorded on Duke Energy Ohio's Consolidated Balance Sheets.

			December 31,									Earns/Pays			Recovery/Refund
(in millions)			2025			2024						a Return			Period Ends
Regulatory Assets(a)
CEP deferral			$	200		195						Yes			(b)
Accrued pension and OPEB			121			131									(d)
COR regulatory asset			114			75									(b)
Customer connect project			39			44									(b)
Network Integration Transmission Services deferral			31			31						Yes			(b)
Transmission expansion obligation			30			31									(b)
Decoupling			18			29									(b)
Deferred pipeline integrity costs			26			28						Yes			(b)
East Bend deferrals(c)			20			24						Yes			(b)
Propane caverns			22			24									(b)
PISCC and deferred operating expenses(c)			14			15						Yes			2083
AROs – coal ash			14			14						Yes			(b)
Deferred fuel and purchased power			25			8									2026
Other			98			144									(b)
Total regulatory assets			772			793
Less: Current portion			86			88
Total noncurrent regulatory assets			$	686		$	705
Regulatory Liabilities(a)
Net regulatory liability related to income taxes			$	405		$	432								(b)
Accrued pension and OPEB			13			14									(d)
Other			109			53									(b)
Total regulatory liabilities			527			499
Less: Current portion			57			34
Total noncurrent regulatory liabilities			$	470		$	465

(a)    Regulatory assets and liabilities are excluded from rate base unless otherwise noted.

(b)    The expected recovery or refund period varies or has not been determined.

(c)    Included in rate base.

(d)    Recovered primarily over the average remaining service periods or life expectancies of employees covered by the benefit plans. See Note 23 for additional detail.

Schedule of Regulatory Liabilities

The following tables present the regulatory assets and liabilities recorded on Duke Energy Ohio's Consolidated Balance Sheets.

			December 31,									Earns/Pays			Recovery/Refund
(in millions)			2025			2024						a Return			Period Ends
Regulatory Assets(a)
CEP deferral			$	200		195						Yes			(b)
Accrued pension and OPEB			121			131									(d)
COR regulatory asset			114			75									(b)
Customer connect project			39			44									(b)
Network Integration Transmission Services deferral			31			31						Yes			(b)
Transmission expansion obligation			30			31									(b)
Decoupling			18			29									(b)
Deferred pipeline integrity costs			26			28						Yes			(b)
East Bend deferrals(c)			20			24						Yes			(b)
Propane caverns			22			24									(b)
PISCC and deferred operating expenses(c)			14			15						Yes			2083
AROs – coal ash			14			14						Yes			(b)
Deferred fuel and purchased power			25			8									2026
Other			98			144									(b)
Total regulatory assets			772			793
Less: Current portion			86			88
Total noncurrent regulatory assets			$	686		$	705
Regulatory Liabilities(a)
Net regulatory liability related to income taxes			$	405		$	432								(b)
Accrued pension and OPEB			13			14									(d)
Other			109			53									(b)
Total regulatory liabilities			527			499
Less: Current portion			57			34
Total noncurrent regulatory liabilities			$	470		$	465

(a)    Regulatory assets and liabilities are excluded from rate base unless otherwise noted.

(b)    The expected recovery or refund period varies or has not been determined.

(c)    Included in rate base.

(d)    Recovered primarily over the average remaining service periods or life expectancies of employees covered by the benefit plans. See Note 23 for additional detail.

Duke Energy Indiana

Public Utilities, General Disclosures [Line Items]

Schedule of Regulatory Assets

The following tables present the regulatory assets and liabilities recorded on Duke Energy Indiana's Consolidated Balance Sheets.

			December 31,									Earns/Pays			Recovery/Refund
(in millions)			2025			2024						a Return			Period Ends
Regulatory Assets(a)
AROs – coal ash			$	606		$	554					Yes			(b)
PISCC and deferred operating expenses(c)			201			237						Yes			(b)
Accrued pension and OPEB			203			212									(e)
Retired generation facilities(c)			20			25						Yes			2030
Hedge costs deferrals			30			23									(b)
Customer connect project			18			19									(b)
Deferred fuel and purchased power			60			—									2026
Storm cost deferrals			21			17									(b)
AMI			10			12									2031
Other			56			54									(b)
Total regulatory assets			1,225			1,153
Less: Current portion			193			113
Total noncurrent regulatory assets			$	1,032		$	1,040
Regulatory Liabilities(a)
Net regulatory liability related to income taxes			$	641		$	725								(b)
COR regulatory liability(c)			444			434									(d)
Accrued pension and OPEB			113			139									(e)
Hedge cost deferrals			106			103									(b)
Deferred fuel and purchased power			—			21
DSM / EE			19			11									(b)
Other			137			154									(b)
Total regulatory liabilities			1,460			1,587
Less: Current portion			275			183
Total noncurrent regulatory liabilities			$	1,185		$	1,404

(a)    Regulatory assets and liabilities are excluded from rate base unless otherwise noted.

(b)    The expected recovery or refund period varies or has not been determined.

(c)    Included in rate base.

(d)    Refunded over the life of the associated assets.

(e)    Recovered primarily over the average remaining service periods or life expectancies of employees covered by the benefit plans. See Note 23 for additional detail.

Schedule of Regulatory Liabilities

The following tables present the regulatory assets and liabilities recorded on Duke Energy Indiana's Consolidated Balance Sheets.

			December 31,									Earns/Pays			Recovery/Refund
(in millions)			2025			2024						a Return			Period Ends
Regulatory Assets(a)
AROs – coal ash			$	606		$	554					Yes			(b)
PISCC and deferred operating expenses(c)			201			237						Yes			(b)
Accrued pension and OPEB			203			212									(e)
Retired generation facilities(c)			20			25						Yes			2030
Hedge costs deferrals			30			23									(b)
Customer connect project			18			19									(b)
Deferred fuel and purchased power			60			—									2026
Storm cost deferrals			21			17									(b)
AMI			10			12									2031
Other			56			54									(b)
Total regulatory assets			1,225			1,153
Less: Current portion			193			113
Total noncurrent regulatory assets			$	1,032		$	1,040
Regulatory Liabilities(a)
Net regulatory liability related to income taxes			$	641		$	725								(b)
COR regulatory liability(c)			444			434									(d)
Accrued pension and OPEB			113			139									(e)
Hedge cost deferrals			106			103									(b)
Deferred fuel and purchased power			—			21
DSM / EE			19			11									(b)
Other			137			154									(b)
Total regulatory liabilities			1,460			1,587
Less: Current portion			275			183
Total noncurrent regulatory liabilities			$	1,185		$	1,404

(a)    Regulatory assets and liabilities are excluded from rate base unless otherwise noted.

(b)    The expected recovery or refund period varies or has not been determined.

(c)    Included in rate base.

(d)    Refunded over the life of the associated assets.

(e)    Recovered primarily over the average remaining service periods or life expectancies of employees covered by the benefit plans. See Note 23 for additional detail.

Piedmont

Public Utilities, General Disclosures [Line Items]

Schedule of Regulatory Assets

The following tables present the regulatory assets and liabilities recorded on Piedmont's Consolidated Balance Sheets.

			December 31,									Earns/Pays			Recovery/Refund
(in millions)			2025			2024						a Return			Period Ends
Regulatory Assets(a)
Accrued pension and OPEB(c)			$	131		$	144								(g)
Deferred pipeline integrity costs(c)			91			101									2034
Derivatives – natural gas supply contracts(f)			72			94									2031
Decoupling			28			77						Yes			(b)
Pipeline Integrity Management – Transmission/Distribution			27			14									(b)
Deferred purchased gas costs			26			9						Yes			(b)
AROs – nuclear and other			25			25									(d)
Customer connect project(c)			22			24									2030
Vacation accrual(c)			15			14									2026
Other			19			26						(e)			(b)
Total regulatory assets			456			528
Less: Current portion			106			141
Total noncurrent regulatory assets			$	350		$	387
Regulatory Liabilities(a)
COR regulatory liability(c)			$	425		$	405					(e)			(d)
Net regulatory liability related to income taxes			353			366									(b)
Other			44			76						(e)			(b)
Total regulatory liabilities			822			847
Less: Current portion			20			64
Total noncurrent regulatory liabilities			$	802		$	783

(a)    Regulatory assets and liabilities are excluded from rate base unless otherwise noted.

(b)    The expected recovery or refund period varies or has not been determined.

(c)    Included in rate base.

(d)    Recovery over the life of the associated assets.

(e)    Certain costs earn/pay a return.

(f)    Balance will fluctuate with changes in the market.

(g)    Recovered primarily over the average remaining service periods or life expectancies of employees covered by the benefit plans. See Note 23 for additional detail.

Schedule of Regulatory Liabilities

The following tables present the regulatory assets and liabilities recorded on Piedmont's Consolidated Balance Sheets.

			December 31,									Earns/Pays			Recovery/Refund
(in millions)			2025			2024						a Return			Period Ends
Regulatory Assets(a)
Accrued pension and OPEB(c)			$	131		$	144								(g)
Deferred pipeline integrity costs(c)			91			101									2034
Derivatives – natural gas supply contracts(f)			72			94									2031
Decoupling			28			77						Yes			(b)
Pipeline Integrity Management – Transmission/Distribution			27			14									(b)
Deferred purchased gas costs			26			9						Yes			(b)
AROs – nuclear and other			25			25									(d)
Customer connect project(c)			22			24									2030
Vacation accrual(c)			15			14									2026
Other			19			26						(e)			(b)
Total regulatory assets			456			528
Less: Current portion			106			141
Total noncurrent regulatory assets			$	350		$	387
Regulatory Liabilities(a)
COR regulatory liability(c)			$	425		$	405					(e)			(d)
Net regulatory liability related to income taxes			353			366									(b)
Other			44			76						(e)			(b)
Total regulatory liabilities			822			847
Less: Current portion			20			64
Total noncurrent regulatory liabilities			$	802		$	783

(a)    Regulatory assets and liabilities are excluded from rate base unless otherwise noted.

(b)    The expected recovery or refund period varies or has not been determined.

(c)    Included in rate base.

(d)    Recovery over the life of the associated assets.

(e)    Certain costs earn/pay a return.

(f)    Balance will fluctuate with changes in the market.

(g)    Recovered primarily over the average remaining service periods or life expectancies of employees covered by the benefit plans. See Note 23 for additional detail.

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