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VALUATION AND QUALIFYING ACCOUNTS | 12 Months Ended
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Dec. 31, 2021
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, 2021, 2020, AND 2019
|  |  | 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) |  |  |  |  |  |  |  |  |
2021 | $ | 118 |  |  | $ | 51 |  |  | $ | (23) |  |  | $ | 68 |  |  | $ | 78 |
2020 | 49 |  |  | 78 |  |  | 27 |  |  | 36 |  |  | 118 |
2019 | 50 |  |  | 68 |  |  | — |  |  | 69 |  |  | 49 |
Alabama Power |  |  |  |  |  |  |  |  |
2021 | $ | 43 |  |  | $ | (7) |  |  | $ | — |  |  | $ | 22 |  |  | $ | 14 |
2020 | 22 |  |  | 25 |  |  | — |  |  | 4 |  |  | 43 |
2019 | 10 |  |  | 24 |  |  | — |  |  | 12 |  |  | 22 |
Georgia Power(b) |  |  |  |  |  |  |  |  |
2021 | $ | 26 |  |  | $ | 16 |  |  | $ | (23) |  |  | $ | 17 |  |  | $ | 2 |
2020 | 2 |  |  | 14 |  |  | 23 |  |  | 13 |  |  | 26 |
2019 | 2 |  |  | 13 |  |  | — |  |  | 13 |  |  | 2 |
Mississippi Power |  |  |  |  |  |  |  |  |
2021 | $ | 1 |  |  | $ | 1 |  |  | $ | — |  |  | $ | 1 |  |  | $ | 1 |
2020 | 1 |  |  | 1 |  |  | — |  |  | 1 |  |  | 1 |
2019 | 1 |  |  | 2 |  |  | — |  |  | 2 |  |  | 1 |
Southern Power |  |  |  |  |  |  |  |  |
2021 | $ | — |  |  | $ | 5 |  |  | $ | — |  |  | $ | — |  |  | $ | 5 |
2020 | — |  |  | — |  |  | — |  |  | — |  |  | — |
2019 | — |  |  | — |  |  | — |  |  | — |  |  | — |
Southern Company Gas |  |  |  |  |  |  |  |  |
2021 | $ | 40 |  |  | $ | 26 |  |  | $ | — |  |  | $ | 27 |  |  | $ | 39 |
2020 | 18 |  |  | 35 |  |  | 4 |  |  | 17 |  |  | 40 |
2019 | 30 |  |  | 29 |  |  | — |  |  | 41 |  |  | 18 |
(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. See Note 2 to the financial statements under "Georgia Power – Deferral of Incremental COVID-19 Costs" in Item 8 herein for additional information. SCHEDULE II — VALUATION AND QUALIFYING ACCOUNTS (CONTINUED) FOR THE YEARS ENDED DECEMBER 31, 2021, 2020, AND 2019
|  |  | 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)(c) |  |  |  |  |  |  |  |  |
2021 | $ | 112 |  |  | $ | 57 |  |  | $ | — |  |  | $ | — |  |  | $ | 169 |
2020 | 113 |  |  | — |  |  | — |  |  | 1 |  |  | 112 |
2019 | 100 |  |  | 13 |  |  | — |  |  | — |  |  | 113 |
Georgia Power(a) |  |  |  |  |  |  |  |  |
2021 | $ | 28 |  |  | $ | 30 |  |  | $ | — |  |  | $ | — |  |  | $ | 58 |
2020 | 28 |  |  | — |  |  | — |  |  | — |  |  | 28 |
2019 | 33 |  |  | (5) |  |  | — |  |  | — |  |  | 28 |
Mississippi Power(b) |  |  |  |  |  |  |  |  |
2021 | $ | 32 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 32 |
2020 | 32 |  |  | — |  |  | — |  |  | — |  |  | 32 |
2019 | 32 |  |  | — |  |  | — |  |  | — |  |  | 32 |
Southern Power |  |  |  |  |  |  |  |  |
2021 | $ | 27 |  |  | $ | (6) |  |  | $ | — |  |  | $ | — |  |  | $ | 21 |
2020 | 29 |  |  | (1) |  |  | — |  |  | 1 |  |  | 27 |
2019 | 22 |  |  | 7 |  |  | — |  |  | — |  |  | 29 |
Southern Company Gas(c) |  |  |  |  |  |  |  |  |
2021 | $ | 4 |  |  | $ | 3 |  |  | $ | — |  |  | $ | — |  |  | $ | 7 |
2020 | 4 |  |  | — |  |  | — |  |  | — |  |  | 4 |
2019 | 12 |  |  | (8) |  |  | — |  |  | — |  |  | 4 |
(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 of Mississippi net operating loss carryforward expected to expire prior to being fully utilized. (c)In 2019, Southern Company Gas reversed a $13 million valuation allowance for a federal deferred tax asset in connection with the sale of Triton. Additionally, in 2019, a $5 million valuation allowance was established for a state net operating loss carryforward expected to expire prior to being fully utilized. See Note 15 to the financial statements under "Southern Company Gas" in Item 8 herein for additional information. 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 -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 12 -Subsection 09 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e24092-122690 + Details
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