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VALUATION AND QUALIFYING ACCOUNTS | 12 Months Ended
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Dec. 31, 2023
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract] |
VALUATION AND QUALIFYING ACCOUNTS | SCHEDULE II — VALUATION AND QUALIFYING ACCOUNTS FOR THE YEARS ENDED DECEMBER 31, 2023, 2022, AND 2021
|  |  | Additions |  |  |
Description | Balance at Beginning of Period |  | Charged to Income |  | Charged to Other Accounts |  | Deductions(a) |  | Balance at End of Period
| (in millions)
Provision for uncollectible accounts: |  |  |  |  |  |  |  |  |
Southern Company(b) |  |  |  |  |  |  |  |  |
2023 | $ | 71 |  |  | $ | 87 |  |  | $ | 3 |  |  | $ | 93 |  |  | $ | 68 |
2022 | 78 |  |  | 71 |  |  | (1) |  |  | 77 |  |  | 71 |
2021 | 118 |  |  | 51 |  |  | (23) |  |  | 68 |  |  | 78 |
Alabama Power |  |  |  |  |  |  |  |  |
2023 | $ | 14 |  |  | $ | 16 |  |  | $ | — |  |  | $ | 14 |  |  | $ | 16 |
2022 | 14 |  |  | 10 |  |  | — |  |  | 10 |  |  | 14 |
2021 | 43 |  |  | (7) |  |  | — |  |  | 22 |  |  | 14 |
Georgia Power(b) |  |  |  |  |  |  |  |  |
2023 | $ | 3 |  |  | $ | 26 |  |  | $ | — |  |  | $ | 25 |  |  | $ | 4 |
2022 | 2 |  |  | 21 |  |  | — |  |  | 20 |  |  | 3 |
2021 | 26 |  |  | 16 |  |  | (23) |  |  | 17 |  |  | 2 |
Mississippi Power |  |  |  |  |  |  |  |  |
2023 | $ | 1 |  |  | $ | 2 |  |  | $ | — |  |  | $ | 2 |  |  | $ | 1 |
2022 | 1 |  |  | 1 |  |  | 1 |  |  | 2 |  |  | 1 |
2021 | 1 |  |  | 1 |  |  | — |  |  | 1 |  |  | 1 |
Southern Power |  |  |  |  |  |  |  |  |
2023 | $ | 1 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 1 |
2022 | 5 |  |  | (2) |  |  | — |  |  | 2 |  |  | 1 |
2021 | — |  |  | 5 |  |  | — |  |  | — |  |  | 5 |
Southern Company Gas |  |  |  |  |  |  |  |  |
2023 | $ | 50 |  |  | $ | 43 |  |  | $ | 3 |  |  | $ | 52 |  |  | $ | 44 |
2022 | 39 |  |  | 55 |  |  | — |  |  | 44 |  |  | 50 |
2021 | 40 |  |  | 26 |  |  | — |  |  | 27 |  |  | 39 |
(a)Deductions represent write-offs of accounts considered to be uncollectible, less recoveries of amounts previously written off. (b)During 2020, Georgia Power recorded $23 million of expected bad debt related to the COVID-19 pandemic to a regulatory asset in accordance with orders from the Georgia PSC. During 2021, based on a review of bad debt amounts under a Georgia PSC-approved methodology, Georgia Power reversed substantially all of the amount recorded in 2020. SCHEDULE II — VALUATION AND QUALIFYING ACCOUNTS (CONTINUED) FOR THE YEARS ENDED DECEMBER 31, 2023, 2022, AND 2021
|  |  | Additions |  |  |
Description | Balance at Beginning of Period |  | Charged to Income |  | Charged to Other Accounts |  | Deductions |  | Balance at End of Period
| (in millions)
Tax valuation allowance (net state): |  |  |  |  |  |  |  |  |
Southern Company(a)(b) |  |  |  |  |  |  |  |  |
2023 | $ | 207 |  |  | $ | (14) |  |  | $ | (25) |  |  | $ | — |  |  | $ | 168 |
2022 | 169 |  |  | 68 |  |  | (30) |  |  | — |  |  | 207 |
2021 | 112 |  |  | 57 |  |  | — |  |  | — |  |  | 169 |
Georgia Power(a) |  |  |  |  |  |  |  |  |
2023 | $ | 98 |  |  | $ | (15) |  |  | $ | (23) |  |  | $ | — |  |  | $ | 60 |
2022 | 58 |  |  | 70 |  |  | (30) |  |  | — |  |  | 98 |
2021 | 28 |  |  | 30 |  |  | — |  |  | — |  |  | 58 |
Mississippi Power(b) |  |  |  |  |  |  |  |  |
2023 | $ | 32 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 32 |
2022 | 32 |  |  | — |  |  | — |  |  | — |  |  | 32 |
2021 | 32 |  |  | — |  |  | — |  |  | — |  |  | 32 |
Southern Power(b) |  |  |  |  |  |  |  |  |
2023 | $ | 21 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 21 |
2022 | 21 |  |  | — |  |  | — |  |  | — |  |  | 21 |
2021 | 27 |  |  | (6) |  |  | — |  |  | — |  |  | 21 |
Southern Company Gas(b) |  |  |  |  |  |  |  |  |
2023 | $ | 7 |  |  | $ | — |  |  | $ | (2) |  |  | $ | — |  |  | $ | 5 |
2022 | 7 |  |  | — |  |  | — |  |  | — |  |  | 7 |
2021 | 4 |  |  | 3 |  |  | — |  |  | — |  |  | 7 |
(a)In 2018, Georgia Power established a valuation allowance for certain Georgia state tax credits expected to expire prior to being fully utilized, which has been adjusted in subsequent years as a result of changes in projected state taxable income. (b)Associated with a state net operating loss carryforward expected to expire prior to being fully utilized. See Note 10 to the financial statements in Item 8 herein for additional information.

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- Definition The entire disclosure for valuation and qualifying accounts and reserves. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name Regulation S-X (SX) -Number 210 -Section 12 -Subsection 09 -Publisher SEC Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480678/235-10-S99-4 + Details
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