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Financing and Leases (Tables) | 6 Months Ended
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Jun. 30, 2023
Debt Disclosure [Abstract] |
Schedule of Credit Arrangements | At June 30, 2023, committed credit arrangements with banks were as follows:
|  | Expires |  |  |  |  |  |  |  |
Company |  | 2024 | 2025 | 2026 | 2028 |  | Total |  | Unused |  |  |  |  |  |  |  | Expires within One Year
|  | (in millions)
Southern Company parent(a) |  | $ | 150 |  | $ | — |  | $ | — |  | $ | 1,850 |  |  | $ | 2,000 |  |  | $ | 1,998 |  |  |  |  |  |  |  |  | $ | 150 |
Alabama Power |  | 550 |  | — |  | — |  | 700 |  |  | 1,250 |  |  | 1,250 |  |  |  |  |  |  |  |  | — |
Georgia Power |  | — |  | — |  | — |  | 1,750 |  |  | 1,750 |  |  | 1,726 |  |  |  |  |  |  |  |  | — |
Mississippi Power |  | — |  | 125 |  | 150 |  | — |  |  | 275 |  |  | 275 |  |  |  |  |  |  |  |  | — |
Southern Power(a)(b) |  | — |  | — |  | — |  | 600 |  |  | 600 |  |  | 589 |  |  |  |  |  |  |  |  | — |
Southern Company Gas(c) |  | 100 |  | — |  | — |  | 1,500 |  |  | 1,600 |  |  | 1,598 |  |  |  |  |  |  |  |  | 100 |
SEGCO |  | 30 |  | — |  | — |  | — |  |  | 30 |  |  | 30 |  |  |  |  |  |  |  |  | 30 |
Southern Company |  | $ | 830 |  | $ | 125 |  | $ | 150 |  | $ | 6,400 |  |  | $ | 7,505 |  |  | $ | 7,466 |  |  |  |  |  |  |  |  | $ | 280 |
(a)Arrangement expiring in 2028 represents a $2.45 billion combined arrangement for Southern Company and Southern Power as borrowers. Pursuant to the combined facility, the allocations between Southern Company and Southern Power may be adjusted. (b)Does not include Southern Power Company's $75 million and $100 million continuing letter of credit facilities for standby letters of credit, expiring in 2025 and 2026, respectively, of which $9 million and $16 million, respectively, was unused at June 30, 2023. In March 2023, Southern Power amended the $100 million letter of credit facility, which, among other things, extended the expiration date from 2025 to 2026 and increased the amount from $75 million. Southern Power's subsidiaries are not parties to its bank credit arrangements or letter of credit facilities. (c)Southern Company Gas, as the parent entity, guarantees the obligations of Southern Company Gas Capital, which is the borrower of $800 million of the credit arrangement expiring in 2028. Southern Company Gas' committed credit arrangement expiring in 2028 also includes $700 million for which Nicor Gas is the borrower and which is restricted for working capital needs of Nicor Gas. Pursuant to the multi-year credit arrangement expiring in 2028, the allocations between Southern Company Gas Capital and Nicor Gas may be adjusted. Nicor Gas is also the borrower under a $100 million credit arrangement expiring in 2024.
Schedule of Shares Used to Compute Diluted Earnings Per Share | Shares used to compute diluted EPS were as follows:
| Three Months Ended June 30, | Six Months Ended June 30,
| 2023 | 2022 | 2023 | 2022
| (in millions)
As reported shares | 1,092 |  | 1,065 |  | 1,092 |  | 1,064 |
Effect of stock-based compensation | 6 |  | 5 |  | 6 |  | 5 |
Effect of equity units | — |  | 2 |  | — |  | 1 |
Diluted shares | 1,098 |  | 1,072 |  | 1,098 |  | 1,070 |

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- Definition Tabular disclosure of short-term or long-term contractual arrangements with lenders, including letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 + Details
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