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REGULATORY MATTERS (Tables)

12 Months Ended

Dec. 31, 2024

Storm damage reserve activity for the traditional electric operating companies during 2023 and 2024 was as follows:


	Southern Company		Alabama Power		Georgia Power		Mississippi Power
	(in millions)



Balance at December 31, 2022	$	216	$	97	$	83	$	36
Accrual	61		18		31		12
Weather-related damages	(211)		(39)		(168)		(4)
Balance at December 31, 2023	$	66	$	76	$	(54)	$	44
Accrual	79		34		31		14
Weather-related damages	(850)		(40)		(804)		(6)
Balance at December 31, 2024	$	(705)	$	70	$	(827)	$	52

The traditional electric operating companies accrued the following amounts related to storm damage recovery in 2022:


	Southern Company		Alabama Power		Georgia Power		Mississippi Power
	(in millions)
2022	$	239	$	19	$	213	$	7

During 2024, 2023, and 2022, Alabama Power and Mississippi Power accrued the following amounts to their reliability reserves:


	Southern Company		Alabama Power		Mississippi Power
	(in millions)
2024	$	84	$	63	$	21
2023	63		52		11
2022	191		166		25

Details of regulatory assets and (liabilities) reflected in the balance sheets at December 31, 2024 and 2023 are provided in the following tables:


	Southern Company		Alabama Power		Georgia Power		Mississippi Power		Southern Company Gas
	(in millions)
At December 31, 2024
AROs(*)	$	5,810	$	1,906	$	3,658	$	248	$	—
Retiree benefit plans(*)	2,605		680		892		134		44
Remaining net book value of retired assets	1,198		454		729		15		—
Deferred income tax charges	927		264		634		27		—
Storm damage	859		—		827		32		—
Deferred depreciation	535		286		249		—		—
Environmental remediation(*)	249		—		16		—		233
Vacation pay(*)	224		85		112		12		15
Loss on reacquired debt	219		32		183		4		—
Software and cloud computing costs	200		76		116		4		4
Under recovered regulatory clause revenues	167		119		—		17		31
Regulatory clauses	162		82		—		—		80
Nuclear outage	92		39		53		—		—
Fuel-hedging (realized and unrealized) losses	69		23		29		17		—
Qualifying repairs of natural gas distribution systems	53		—		—		—		53
Long-term debt fair value adjustment	52		—		—		—		52
Plant Daniel Units 3 and 4	23		—		—		23		—
Other regulatory assets	184		42		40		30		72
Deferred income tax credits	(4,536)		(1,398)		(2,149)		(219)		(755)
Other cost of removal obligations	(1,176)		24		816		(170)		(1,846)
Over recovered regulatory clause revenues	(285)		(29)		(52)		—		(204)
Reliability reserves	(188)		(131)		—		(57)		—
Storm/property damage reserves	(122)		(70)		—		(52)		—
Nuclear fuel disposal cost recovery	(100)		(100)		—		—		—
Other regulatory liabilities	(180)		(28)		(14)		(6)		(31)
Total regulatory assets (liabilities), net	$	7,041	$	2,356	$	6,139	$	59	$	(2,252)


	Southern Company		Alabama Power		Georgia Power		Mississippi Power		Southern Company Gas
	(in millions)
At December 31, 2023
AROs(*)	$	5,733	$	1,936	$	3,505	$	247	$	—
Retiree benefit plans(*)	3,011		815		976		140		146
Remaining net book value of retired assets	1,357		499		841		17		—
Deferred income tax charges	897		262		605		28		—
Under recovered regulatory clause revenues	413		381		—		12		20
Fuel-hedging (realized and unrealized) losses	270		100		121		49		—
Deferred depreciation	270		143		127		—		—
Environmental remediation(*)	255		—		20		—		235
Loss on reacquired debt	238		35		197		5		1
Vacation pay(*)	217		83		107		11		16
Software and cloud computing costs	150		59		84		2		5
Regulatory clauses	140		112		—		—		28
Storm damage	92		—		54		38		—
Nuclear outage	83		50		33		—		—
Long-term debt fair value adjustment	60		—		—		—		60
Qualifying repairs of natural gas distribution systems	40		—		—		—		40
Plant Daniel Units 3 and 4	25		—		—		25		—
Other regulatory assets	189		39		33		25		93
Deferred income tax credits	(4,686)		(1,506)		(2,161)		(241)		(759)
Other cost of removal obligations	(1,312)		28		617		(186)		(1,771)
Over recovered regulatory clause revenues	(287)		(3)		(46)		—		(238)
Reliability reserves	(179)		(143)		—		(36)		—
Storm/property damage reserves	(120)		(76)		—		(44)		—
Other regulatory liabilities	(333)		(94)		(23)		(2)		(101)
Total regulatory assets (liabilities), net	$	6,523	$	2,720	$	5,090	$	90	$	(2,225)

(*)Generally not earning a return as they are excluded from rate base or are offset in rate base by a corresponding asset or liability.

Unless otherwise noted, the following recovery and amortization periods for these regulatory assets and (liabilities) have been approved by the respective state PSC or regulatory agency:

AROs and other cost of removal obligations – Generally recorded over the related property lives, which may range up to 64 years for Alabama Power, 54 years for Georgia Power, 67 years for Mississippi Power, and 85 years for Southern Company Gas. AROs and other cost of removal obligations are settled and trued up following completion of the related activities. Alabama Power is recovering CCR ARO expenditures over a 38-year period ending in 2054 through Rate CNP Compliance. Effective January 1, 2023, Georgia Power is recovering CCR ARO expenditures over four-year periods through its ECCR tariff. Prior to 2023, expenditures were recovered over three-year periods. See "Georgia Power – Rate Plans" herein and Note 6 for additional information.

Retiree benefit plans – Recovered and amortized over the average remaining service period, which may range up to 14 years for Alabama Power, Georgia Power, Mississippi Power, and Southern Company Gas. Southern Company's balances also include amounts at SCS and Southern Nuclear that are allocated to the applicable regulated utilities. See Note 11 for additional information.

Remaining net book value of retired assets –

Alabama Power: Primarily represents the net book value of Plant Gorgas Unit 10 ($419 million at December 31, 2024) being amortized over 13 years (through 2037) and Plant Barry Unit 4 ($35 million at December 31, 2024) being amortized over 10 years (through 2034). See "Alabama Power – Environmental Accounting Order" herein for additional information.

Georgia Power: Net book values of Plant Wansley Units 1 and 2 and Plant Hammond Units 3 and 4 (totaling $418 million and $302 million, respectively, at December 31, 2024) are being amortized over remaining periods between one and 11 years (between 2025 and 2035). Balance also includes unusable materials and supplies inventories, for which the Georgia PSC will determine a recovery period in a future base rate case.

Mississippi Power: Represents net book value of certain environmental compliance assets at Plant Watson and Plant Greene County. The retail portion is being amortized over 10 years (through 2033) and the wholesale portion is being amortized over 10 years (through 2034). See "Mississippi Power – Environmental Compliance Overview Plan" herein for additional information.

Deferred income tax charges and credits – Charges are recovered and credits are primarily amortized over the related property lives, which may range up to 64 years for Alabama Power, 54 years for Georgia Power, 67 years for Mississippi Power, and 85 years for Southern Company Gas. See Note 10 for additional information. These accounts include certain deferred income tax assets and liabilities not subject to normalization, as described further below:

Alabama Power: Related amounts at December 31, 2024 include excess federal deferred income tax liabilities that are available for the benefit of customers in 2025, as discussed under "Alabama Power – Excess Accumulated Deferred Income Tax Accounting Order" herein. Remaining amounts are being recovered and amortized ratably over the related property lives.

Georgia Power: Related amounts at December 31, 2024 include $135 million of deferred income tax assets related to construction costs for Plant Vogtle Units 3 and 4 being recovered over 10 years (through 2034) and $102 million of excess state deferred income tax liabilities that will be returned to customers in 2025. See "Georgia Power – Nuclear Construction – Regulatory Matters" herein for additional information on recovery of costs related to Plant Vogtle Units 3 and 4.

Southern Company Gas: Related amounts at December 31, 2024 include $24 million of deferred income tax liabilities being amortized over periods generally not exceeding five years, primarily related to excess state deferred income tax liabilities. See "Southern Company Gas – Rate Proceedings" herein for additional information.

Storm damage – See "Georgia Power – Storm Damage Recovery" herein and Note 1 under "Storm Damage and Reliability Reserves" for additional information. Mississippi Power's balance represents deferred storm costs associated with Hurricanes Ida and Zeta being recovered through PEP over seven years (through 2029).

Deferred depreciation –

Alabama Power: Represents deferred depreciation for Plant Barry Unit 5 ($114 million at December 31, 2024) and Plant Barry common coal assets ($48 million at December 31, 2024) to be amortized until 2036 beginning when Plant Barry Unit 5 is retired and Plant Gaston Unit 5 coal assets ($124 million at December 31, 2024) to be amortized until 2039 beginning when the assets are retired.

Georgia Power: Represents deferred depreciation for Plant Scherer Units 1 through 3 ($139 million at December 31, 2024) to be amortized over six years beginning in 2029 and Plant Bowen Units 1 and 2 ($80 million at December 31, 2024) to be amortized over four years beginning in 2031, both as approved under Georgia Power's 2022 ARP, and Plant Vogtle Unit 3 and common facilities ($29 million at December 31, 2024) being amortized over 10 years (through 2034). See "Georgia Power – Nuclear Construction – Regulatory Matters" herein for additional information on recovery of costs related to Plant Vogtle Units 3 and 4.

Environmental remediation – Effective January 1, 2023, Georgia Power is recovering $5 million annually for environmental remediation under the 2022 ARP. Southern Company Gas' costs are recovered through environmental cost recovery mechanisms when the remediation work is performed. See Note 3 under "Environmental Remediation" for additional information.

Vacation pay – Recorded as earned by employees and recovered as paid, generally within one year. Includes both vacation and banked holiday pay, if applicable.

Loss on reacquired debt – Recovered over either the remaining life of the original issue or, if refinanced, over the remaining life of the new issue. At December 31, 2024, the remaining amortization periods do not exceed 23 years for Alabama Power, 28 years for Georgia Power, 17 years for Mississippi Power, and three years for Southern Company Gas.

Software and cloud computing costs – Represents certain deferred operations and maintenance costs associated with software and cloud computing projects. For Alabama Power, costs are amortized ratably over the life of the related software, which ranges up to 10 years (through 2034). For Georgia Power, costs incurred through 2022 are being amortized over five years (through 2027), and the recovery period for costs incurred after 2022 will be determined in its next base rate case. For Mississippi Power, the recovery period will be determined in Mississippi Power's annual PEP filing process following the completion of the projects and is expected to begin no earlier than 2026. For Southern Company Gas, costs are being amortized ratably over the life of the related software, which ranges up to 10 years (through 2034).

Under and over recovered regulatory clause revenues –

Alabama Power: Balances are recorded monthly and expected to be recovered over periods of up to six years, with the majority expected to be recovered within one year. See "Alabama Power – Rate CNP PPA," " – Rate CNP Compliance," and " – Rate ECR" herein for additional information.

Georgia Power: Balances are recorded monthly and expected to be recovered or returned within two years. See "Georgia Power – Rate Plans" herein for additional information.

Mississippi Power: At December 31, 2024, $17 million is expected to be recovered through various rate recovery mechanisms over a period to be determined in future rate filings. See "Mississippi Power – Ad Valorem Tax Adjustment" herein for additional information.

Southern Company Gas: Balances are recorded and recovered or amortized over periods generally not exceeding five years. In addition to natural gas cost recovery mechanisms, the natural gas distribution utilities have various other cost recovery mechanisms for the recovery of costs, including those related to infrastructure replacement programs.

Regulatory clauses –

Alabama Power: Effective January 1, 2023, balance is being amortized through Rate RSE over a five-year period ending in 2027.

Southern Company Gas: Represents amounts related to Nicor Gas' volume balancing adjustment rider expected to be recovered over a period of less than two years.

Nuclear outage – Costs are deferred to a regulatory asset when incurred and amortized over a subsequent period of 18 months for Alabama Power and up to 24 months for Georgia Power. See Note 5 for additional information.

Fuel-hedging (realized and unrealized) losses and gains – Assets and liabilities are recorded over the life of the underlying hedged purchase contracts. Upon final settlement, actual costs incurred are recovered through the applicable traditional electric operating company's fuel cost recovery mechanism. Purchase contracts generally do not exceed three and a half years for Alabama Power, three years for Georgia Power, and four years for Mississippi Power. Immaterial amounts for fuel-hedging gains at December 31, 2024 and 2023 are included in other regulatory liabilities.

Qualifying repairs of natural gas distribution systems – Represents deferred costs of certain repairs at Atlanta Gas Light being amortized over 20 years.

Long-term debt fair value adjustment – Recovered over the remaining lives of the original debt issuances at acquisition, which range up to 14 years at December 31, 2024.

Plant Daniel Units 3 and 4 – Represents the difference between Mississippi Power's revenue requirement for Plant Daniel Units 3 and 4 under purchase accounting and operating lease accounting. At December 31, 2024, consists of the $16 million retail portion being amortized through 2039 over the remaining life of the related property and the $8 million wholesale portion being amortized over 10 years (through 2034).

Other regulatory assets – Comprised of numerous immaterial components with remaining amortization periods at December 31, 2024 generally not exceeding 19 years for Alabama Power, 10 years for Georgia Power, 10 years for Mississippi Power, and 15 years for Southern Company Gas.

Reliability reserves and storm/property damage reserves – Utilized as related expenses are incurred. See "Alabama Power – Rate NDR" and " – Reliability Reserve Accounting Order," "Georgia Power – Storm Damage Recovery," and "Mississippi Power – System Restoration Rider" and " – Reliability Reserve Accounting Order" herein and Note 1 under "Storm Damage and Reliability Reserves" for additional information.

Nuclear fuel disposal cost recovery – Represents award resulting from litigation related to nuclear fuel disposal costs. See Note 3 under "Nuclear Fuel Disposal Costs" for additional information.

Other regulatory liabilities – Comprised of numerous immaterial components with remaining amortization periods at December 31, 2024 generally not exceeding one year for Alabama Power, three years for Georgia Power, one year for Mississippi Power, and 20 years for Southern Company Gas.

The following table illustrates Southern Company Gas' authorized ratemaking amounts that are not recognized on its balance sheets. These amounts are primarily comprised of an allowed equity rate of return on assets associated with certain regulatory infrastructure programs. These amounts will be recognized as revenues in Southern Company Gas' financial statements in the periods they are billable to customers, the majority of which will be recovered by 2025.



	December 31, 2024		December 31, 2023
	(in millions)
Atlanta Gas Light	$	11	$	23
Virginia Natural Gas	10		10
Chattanooga Gas	7		7
Nicor Gas	—		3
Total	$	28	$	43

Schedule of regulatory liabilities

Details of regulatory assets and (liabilities) reflected in the balance sheets at December 31, 2024 and 2023 are provided in the following tables:


	Southern Company		Alabama Power		Georgia Power		Mississippi Power		Southern Company Gas
	(in millions)
At December 31, 2024
AROs(*)	$	5,810	$	1,906	$	3,658	$	248	$	—
Retiree benefit plans(*)	2,605		680		892		134		44
Remaining net book value of retired assets	1,198		454		729		15		—
Deferred income tax charges	927		264		634		27		—
Storm damage	859		—		827		32		—
Deferred depreciation	535		286		249		—		—
Environmental remediation(*)	249		—		16		—		233
Vacation pay(*)	224		85		112		12		15
Loss on reacquired debt	219		32		183		4		—
Software and cloud computing costs	200		76		116		4		4
Under recovered regulatory clause revenues	167		119		—		17		31
Regulatory clauses	162		82		—		—		80
Nuclear outage	92		39		53		—		—
Fuel-hedging (realized and unrealized) losses	69		23		29		17		—
Qualifying repairs of natural gas distribution systems	53		—		—		—		53
Long-term debt fair value adjustment	52		—		—		—		52
Plant Daniel Units 3 and 4	23		—		—		23		—
Other regulatory assets	184		42		40		30		72
Deferred income tax credits	(4,536)		(1,398)		(2,149)		(219)		(755)
Other cost of removal obligations	(1,176)		24		816		(170)		(1,846)
Over recovered regulatory clause revenues	(285)		(29)		(52)		—		(204)
Reliability reserves	(188)		(131)		—		(57)		—
Storm/property damage reserves	(122)		(70)		—		(52)		—
Nuclear fuel disposal cost recovery	(100)		(100)		—		—		—
Other regulatory liabilities	(180)		(28)		(14)		(6)		(31)
Total regulatory assets (liabilities), net	$	7,041	$	2,356	$	6,139	$	59	$	(2,252)


	Southern Company		Alabama Power		Georgia Power		Mississippi Power		Southern Company Gas
	(in millions)
At December 31, 2023
AROs(*)	$	5,733	$	1,936	$	3,505	$	247	$	—
Retiree benefit plans(*)	3,011		815		976		140		146
Remaining net book value of retired assets	1,357		499		841		17		—
Deferred income tax charges	897		262		605		28		—
Under recovered regulatory clause revenues	413		381		—		12		20
Fuel-hedging (realized and unrealized) losses	270		100		121		49		—
Deferred depreciation	270		143		127		—		—
Environmental remediation(*)	255		—		20		—		235
Loss on reacquired debt	238		35		197		5		1
Vacation pay(*)	217		83		107		11		16
Software and cloud computing costs	150		59		84		2		5
Regulatory clauses	140		112		—		—		28
Storm damage	92		—		54		38		—
Nuclear outage	83		50		33		—		—
Long-term debt fair value adjustment	60		—		—		—		60
Qualifying repairs of natural gas distribution systems	40		—		—		—		40
Plant Daniel Units 3 and 4	25		—		—		25		—
Other regulatory assets	189		39		33		25		93
Deferred income tax credits	(4,686)		(1,506)		(2,161)		(241)		(759)
Other cost of removal obligations	(1,312)		28		617		(186)		(1,771)
Over recovered regulatory clause revenues	(287)		(3)		(46)		—		(238)
Reliability reserves	(179)		(143)		—		(36)		—
Storm/property damage reserves	(120)		(76)		—		(44)		—
Other regulatory liabilities	(333)		(94)		(23)		(2)		(101)
Total regulatory assets (liabilities), net	$	6,523	$	2,720	$	5,090	$	90	$	(2,225)

(*)Generally not earning a return as they are excluded from rate base or are offset in rate base by a corresponding asset or liability.

Unless otherwise noted, the following recovery and amortization periods for these regulatory assets and (liabilities) have been approved by the respective state PSC or regulatory agency:

Remaining net book value of retired assets –

Deferred depreciation –

Vacation pay – Recorded as earned by employees and recovered as paid, generally within one year. Includes both vacation and banked holiday pay, if applicable.

Under and over recovered regulatory clause revenues –

Georgia Power: Balances are recorded monthly and expected to be recovered or returned within two years. See "Georgia Power – Rate Plans" herein for additional information.

Regulatory clauses –

Alabama Power: Effective January 1, 2023, balance is being amortized through Rate RSE over a five-year period ending in 2027.

Southern Company Gas: Represents amounts related to Nicor Gas' volume balancing adjustment rider expected to be recovered over a period of less than two years.

Qualifying repairs of natural gas distribution systems – Represents deferred costs of certain repairs at Atlanta Gas Light being amortized over 20 years.

Long-term debt fair value adjustment – Recovered over the remaining lives of the original debt issuances at acquisition, which range up to 14 years at December 31, 2024.

Nuclear fuel disposal cost recovery – Represents award resulting from litigation related to nuclear fuel disposal costs. See Note 3 under "Nuclear Fuel Disposal Costs" for additional information.

At December 31, 2024 and 2023, the environmental remediation liability and the balance of under recovered environmental remediation costs were reflected in the balance sheets of Southern Company, Georgia Power, and Southern Company Gas as shown in the table below. Alabama Power and Mississippi Power did not have environmental remediation liabilities at December 31, 2024 or 2023.


	Southern Company		Georgia Power		Southern Company Gas
	(in millions)
December 31, 2024:
Environmental remediation liability:
Other current liabilities	$	37	$	13	$	24
Accrued environmental remediation	198		—		198
Under recovered environmental remediation costs:
Other regulatory assets, current	$	37	$	5	$	32
Other regulatory assets, deferred	212		11		201

December 31, 2023:
Environmental remediation liability:
Other current liabilities	$	44	$	14	$	30
Accrued environmental remediation	192		—		192
Under recovered environmental remediation costs:
Other regulatory assets, current	$	45	$	5	$	40
Other regulatory assets, deferred	210		15		195

Public utilities general disclosures

Details of tariff adjustments are provided in the following table:


Tariff	2023		2024		2025
	(in millions)
Traditional base(a)	$	194	$	275	$	194
ECCR	(21)		(99)		126
DSM	37		10		(22)
MFF	6		5		9
Total(b)	$	216	$	191	$	306

(a)For 2025, net of $122 million related to the Georgia state tax rate reduction.

(b)Totals may not add due to rounding.

The following table provides regulatory information for Southern Company Gas' natural gas distribution utilities:

Nicor

Gas

Atlanta Gas

Light

Virginia

Natural Gas

Chattanooga

Gas

Authorized ROE at December 31, 2024

9.51%

10.25%

9.70%

9.80%

Weather normalization mechanisms(a)

Decoupled, including straight-fixed-variable rates(b)

Regulatory infrastructure program rate(c)

Bad debt rider(d)

Energy efficiency plan(e)

Annual base rate adjustment mechanism(f)

Year of last base rate case decision

2023

2019

2023

2018

(a)Designed to help stabilize operating results by allowing recovery of costs in the event of unseasonal weather, but are not direct offsets to the potential impacts on earnings of weather and customer consumption.

(b)Allows for recovery of fixed residential customer service costs separately from assumed natural gas volumes used by customers and provides a benchmark level of revenue for recovery.

(c)See "Infrastructure Replacement Programs and Capital Projects" herein for additional information. Chattanooga Gas' pipeline replacement program costs are recovered through its annual base rate review mechanism.

(d)The recovery (refund) of bad debt expense over (under) an established benchmark expense. The gas portion of bad debt expense is recovered through purchased gas adjustment mechanisms. Nicor Gas also has a rider to recover the non-gas portion of bad debt expense.

(e)Recovery of costs associated with plans to achieve specified energy savings goals.

(f)Regulatory mechanism allowing annual adjustments to base rates up or down based on authorized ROE and/or ROE range.

The following table and discussions provide updates on the infrastructure replacement programs and capital projects at the natural gas distribution utilities at December 31, 2024. These programs are risk-based and designed to update and replace cast iron, bare steel, and mid-vintage plastic materials or expand Southern Company Gas' distribution systems to improve reliability and meet operational flexibility and growth.


Utility	Program	Recovery	Capital Expenditures in 2024		Capital Expenditures Since Project Inception		Pipe Installed Since Project Inception	Scope of Program	Program Duration	Last Year of Program
			(in millions)				(miles)	(miles)	(years)
Virginia Natural Gas	SAVE	Rider	$	75	$	561	598	938	18	2029
Atlanta Gas Light	System Reinforcement Rider	Rider	99		279		29	N/A	6	2027
Chattanooga Gas	Pipeline Replacement Program	Rate Base	12		28		24	73	7	2027
Total			$	186	$	868	651	1,011

The following table provides a summary of QIP capital investments during the nine-year program:


Year	Status of QIP Annual Review Proceeding	Capital Investments			Disallowed			Month of Disallowance
		(in millions)
2015 – 2018	Complete	$	1,246		$	—
2019	Complete(a)	415			32			June 2023
2020	Filed March 2021	402		(b)
2021	Filed March 2022	392		(b)
2022	Filed March 2023	408		(b)	6		(c)(d)	November 2023
2023	Filed March 2024	365		(b)	25		(c)(d)	November 2023
		$	3,228		$	63

(a)Petition for leave to appeal filed to the Illinois Supreme Court for $14 million.

(b)Capital investments are subject to the required QIP annual review proceeding; years 2020 through 2023 are pending with the Illinois Commission.

(c)Appealed to the Illinois Appellate Court.

(d)Disallowed in Nicor Gas' 2023 general base rate case proceeding. See "Rate Proceedings – Nicor Gas" herein for additional information regarding the Illinois Commission's disallowance of certain capital investments.

Schedule of revised cost and schedule

Georgia Power's net capital costs incurred through December 31, 2024 in connection with Plant Vogtle Units 3 and 4, and its approximate proportionate share of additional capital costs to be incurred after December 31, 2024, including completion of site demobilization and remaining contractor obligations, is as follows:


	(in millions)


Total project capital cost forecast(a)(b)	$	10,732
Net investment at December 31, 2024(b)	(10,663)
Remaining estimate to complete	$	69

(a)Includes approximately $1.2 billion of costs that are not shared with the other Vogtle Owners. Excludes financing costs capitalized through AFUDC of approximately $440 million accrued through Unit 4's in-service date.

(b)Net of $1.7 billion received from Toshiba under the Guarantee Settlement Agreement and approximately $188 million in related customer refunds.