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LEASES (Tables) | 12 Months Ended
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Dec. 31, 2023
Leases [Abstract] |
Major categories of lease obligations | The major categories of lease obligations are as follows:
| Southern Company | Alabama Power | Georgia Power | Mississippi Power | Southern Power | Southern Company Gas
| (in millions)
At December 31, 2023 |  |  |  |  |  |
Electric generating units(*) | $ | 670 |  | $ | 58 |  | $ | 1,028 |  | $ | — |  | $ | — |  | $ | — |
Real estate/land | 871 |  | 4 |  | 54 |  | 2 |  | 546 |  | 28 |
Communication towers | 123 |  | 1 |  | 4 |  | — |  | — |  | 23 |
Railcars | 64 |  | 32 |  | 27 |  | 5 |  | — |  | — |
Other | 60 |  | 3 |  | 2 |  | 18 |  | — |  | — |
Total | $ | 1,788 |  | $ | 98 |  | $ | 1,115 |  | $ | 25 |  | $ | 546 |  | $ | 51 |
At December 31, 2022 |  |  |  |  |  |
Electric generating units(*) | $ | 760 |  | $ | 59 |  | $ | 1,163 |  | $ | — |  | $ | — |  | $ | — |
Real estate/land | 885 |  | 4 |  | 54 |  | 2 |  | 542 |  | 36 |
Communication towers | 141 |  | 2 |  | 4 |  | — |  | — |  | 23 |
Railcars | 34 |  | 12 |  | 18 |  | 3 |  | — |  | — |
Other | 79 |  | 4 |  | 1 |  | 21 |  | — |  | 1 |
Total | $ | 1,899 |  | $ | 81 |  | $ | 1,240 |  | $ | 26 |  | $ | 542 |  | $ | 60 |
(*)Amounts related to affiliate leases are eliminated in consolidation for Southern Company. See "Contracts that Contain a Lease" herein for additional information.
Balance sheet amounts recorded for operating and financing leases | Balance sheet amounts recorded for operating and finance leases are as follows:
| Southern Company | Alabama Power | Georgia Power | Mississippi Power | Southern Power | Southern Company Gas
| (in millions)
At December 31, 2023 |  |  |  |  |  |
Operating Leases |  |  |  |  |  |
Operating lease ROU assets, net | $ | 1,432 |  | $ | 87 |  | $ | 884 |  | $ | 9 |  | $ | 488 |  | $ | 47 |
Operating lease obligations - current | $ | 183 |  | $ | 12 |  | $ | 135 |  | $ | 3 |  | $ | 29 |  | $ | 11 |
Operating lease obligations - non-current | 1,307 |  | 81 |  | 740 |  | 6 |  | 517 |  | 40 |
Total operating lease obligations(*) | $ | 1,490 |  | $ | 93 |  | $ | 875 |  | $ | 9 |  | $ | 546 |  | $ | 51 |
Finance Leases |  |  |  |  |  |
Finance lease ROU assets, net | $ | 272 |  | $ | 5 |  | $ | 203 |  | $ | 15 |  | $ | — |  | $ | — |
Finance lease obligations - current | $ | 11 |  | $ | 2 |  | $ | 18 |  | $ | 1 |  | $ | — |  | $ | — |
Finance lease obligations - non-current | 287 |  | 3 |  | 222 |  | 15 |  | — |  | — |
Total finance lease obligations | $ | 298 |  | $ | 5 |  | $ | 240 |  | $ | 16 |  | $ | — |  | $ | — |
At December 31, 2022 |  |  |  |  |  |
Operating Leases |  |  |  |  |  |
Operating lease ROU assets, net | $ | 1,531 |  | $ | 71 |  | $ | 1,007 |  | $ | 9 |  | $ | 489 |  | $ | 57 |
Operating lease obligations - current | $ | 197 |  | $ | 9 |  | $ | 151 |  | $ | 4 |  | $ | 28 |  | $ | 9 |
Operating lease obligations - non-current | 1,388 |  | 67 |  | 851 |  | 5 |  | 514 |  | 51 |
Total operating lease obligations(*) | $ | 1,585 |  | $ | 76 |  | $ | 1,002 |  | $ | 9 |  | $ | 542 |  | $ | 60 |
Finance Leases |  |  |  |  |  |
Finance lease ROU assets, net | $ | 292 |  | $ | 5 |  | $ | 205 |  | $ | 16 |  | $ | — |  | $ | — |
Finance lease obligations - current | $ | 18 |  | $ | 2 |  | $ | 16 |  | $ | 1 |  | $ | — |  | $ | — |
Finance lease obligations - non-current | 296 |  | 3 |  | 222 |  | 16 |  | — |  | — |
Total finance lease obligations | $ | 314 |  | $ | 5 |  | $ | 238 |  | $ | 17 |  | $ | — |  | $ | — |
(*)Includes operating lease obligations related to PPAs at Southern Company, Alabama Power, and Georgia Power totaling $566 million, $58 million, and $813 million, respectively, at December 31, 2023 and $652 million, $59 million, and $952 million, respectively, at December 31, 2022.
Lease costs and other information | Lease costs for 2023, 2022, and 2021, which includes both amounts recognized as operations and maintenance expense and amounts capitalized as part of the cost of another asset, are as follows:
| Southern Company | Alabama Power | Georgia Power | Mississippi Power | Southern Power | Southern Company Gas
| (in millions)
2023 |  |  |  |  |
Lease cost |  |  |  |  |  |
Operating lease cost(*) | $ | 252 |  | $ | 16 |  | $ | 192 |  | $ | 5 |  | $ | 34 |  | $ | 12 |
Finance lease cost: |  |  |  |  |  |
Amortization of ROU assets | 24 |  | 2 |  | 19 |  | 1 |  | — |  | — |
Interest on lease obligations | 14 |  | — |  | 17 |  | — |  | — |  | — |
Total finance lease cost | 38 |  | 2 |  | 36 |  | 1 |  | — |  | — |
Short-term lease costs | 40 |  | 16 |  | 16 |  | — |  | — |  | — |
Variable lease cost | 47 |  | — |  | 74 |  | — |  | 4 |  | — |
Sublease income | — |  | — |  | — |  | — |  | — |  | — |
Total lease cost | $ | 377 |  | $ | 34 |  | $ | 318 |  | $ | 6 |  | $ | 38 |  | $ | 12 |
2022 |  |  |  |  |  |
Lease cost |  |  |  |  |  |
Operating lease cost(*) | $ | 297 |  | $ | 59 |  | $ | 198 |  | $ | 5 |  | $ | 32 |  | $ | 15 |
Finance lease cost: |  |  |  |  |  |
Amortization of ROU assets | 23 |  | 1 |  | 15 |  | 1 |  | — |  | — |
Interest on lease obligations | 13 |  | — |  | 17 |  | 1 |  | — |  | — |
Total finance lease cost | 36 |  | 1 |  | 32 |  | 2 |  | — |  | — |
Short-term lease costs | 64 |  | 44 |  | 13 |  | — |  | — |  | — |
Variable lease cost | 125 |  | 13 |  | 105 |  | — |  | 5 |  | — |
Sublease income | (1) |  | — |  | — |  | — |  | — |  | — |
Total lease cost | $ | 521 |  | $ | 117 |  | $ | 348 |  | $ | 7 |  | $ | 37 |  | $ | 15 |
2021 |  |  |  |  |  |
Lease cost |  |  |  |  |  |
Operating lease cost(*) | $ | 313 |  | $ | 58 |  | $ | 208 |  | $ | 2 |  | $ | 33 |  | $ | 19 |
Finance lease cost: |  |  |  |  |  |
Amortization of ROU assets | 21 |  | 1 |  | 11 |  | 1 |  | — |  | — |
Interest on lease obligations | 11 |  | — |  | 16 |  | 1 |  | — |  | — |
Total finance lease cost | 32 |  | 1 |  | 27 |  | 2 |  | — |  | — |
Short-term lease costs | 48 |  | 15 |  | 24 |  | — |  | — |  | — |
Variable lease cost | 96 |  | 4 |  | 83 |  | — |  | 5 |  | — |
Sublease income | 1 |  | — |  | — |  | — |  | — |  | — |
Total lease cost | $ | 490 |  | $ | 78 |  | $ | 342 |  | $ | 4 |  | $ | 38 |  | $ | 19 |
(*)Includes operating lease costs related to PPAs at Southern Company, Alabama Power, and Georgia Power totaling $112 million, $4 million, and $174 million, respectively, in 2023, $162 million, $48 million, and $180 million, respectively, in 2022, and $165 million, $47 million, and $184 million, respectively, in 2021. Other information with respect to cash and noncash activities related to leases, as well as weighted-average lease terms and discount rates, is as follows:
| Southern Company | Alabama Power | Georgia Power | Mississippi Power | Southern Power | Southern Company Gas
| (in millions)
2023 |  |  |  |  |  |
Other information |  |  |  |  |  |
Cash paid for amounts included in the measurements of lease obligations: |  |  |  |  |  |
Operating cash flows from operating leases | $ | 253 |  | $ | 17 |  | $ | 199 |  | $ | 5 |  | $ | 33 |  | $ | 12 |
Operating cash flows from finance leases | 15 |  | — |  | 22 |  | — |  | — |  | — |
Financing cash flows from finance leases | 18 |  | 2 |  | 16 |  | 1 |  | — |  | — |
ROU assets obtained under operating leases | 100 |  | 30 |  | 26 |  | 1 |  | 7 |  | 7 |
ROU assets obtained under finance leases | 3 |  | 3 |  | 18 |  | — |  | — |  | — |
2022 |  |  |  |  |  |
Other information |  |  |  |  |  |
Cash paid for amounts included in the measurements of lease obligations: |  |  |  |  |  |
Operating cash flows from operating leases | $ | 303 |  | $ | 58 |  | $ | 206 |  | $ | 5 |  | $ | 30 |  | $ | 14 |
Operating cash flows from finance leases | 11 |  | — |  | 20 |  | 1 |  | — |  | — |
Financing cash flows from finance leases | 16 |  | 1 |  | 10 |  | 1 |  | — |  | — |
ROU assets obtained under operating leases | 56 |  | 10 |  | 17 |  | 9 |  | — |  | 3 |
Reassessment of ROU assets under operating leases | 16 |  | — |  | — |  | — |  | 16 |  | — |
ROU assets obtained under finance leases | 118 |  | 2 |  | 116 |  | — |  | — |  | — |
2021 |  |  |  |  |  |
Other information |  |  |  |  |  |
Cash paid for amounts included in the measurements of lease obligations: |  |  |  |  |  |
Operating cash flows from operating leases | $ | 308 |  | $ | 58 |  | $ | 211 |  | $ | 2 |  | $ | 28 |  | $ | 19 |
Operating cash flows from finance leases | 9 |  | — |  | 17 |  | 1 |  | — |  | — |
Financing cash flows from finance leases | 17 |  | 1 |  | 9 |  | 1 |  | — |  | — |
ROU assets obtained under operating leases | 64 |  | 3 |  | 9 |  | — |  | 72 |  | 7 |
ROU assets obtained under finance leases | 3 |  | — |  | — |  | — |  | — |  | — |
| Southern Company | Alabama Power | Georgia Power | Mississippi Power | Southern Power | Southern Company Gas
At December 31, 2023 |  |  |  |  |  |
Weighted-average remaining lease term in years: |  |  |  |  |  |
Operating leases | 17.2 | 11.1 | 7.5 | 4.6 | 33.1 | 7.0
Finance leases | 16.7 | 4.3 | 10.6 | 11.9 | N/A | N/A
Weighted-average discount rate: |  |  |  |  |  |
Operating leases | 4.68 | % | 5.02 | % | 4.58 | % | 3.67 | % | 4.89 | % | 3.80 | %
Finance leases | 4.85 | % | 3.93 | % | 5.95 | % | 2.74 | % | N/A | N/A
At December 31, 2022 |  |  |  |  |  |
Weighted-average remaining lease term in years: |  |  |  |  |  |
Operating leases | 17.3 | 13.0 | 8.1 | 4.7 | 34.0 | 11.0
Finance leases | 17.4 | 6.4 | 11.8 | 12.9 | N/A | N/A
Weighted-average discount rate: |  |  |  |  |  |
Operating leases | 4.51 | % | 4.87 | % | 4.52 | % | 3.49 | % | 4.86 | % | 3.79 | %
Finance leases | 4.87 | % | 3.00 | % | 8.06 | % | 2.74 | % | N/A | N/A
Maturities of operating lease liabilities | Maturities of lease liabilities are as follows:
| At December 31, 2023
| Southern Company | Alabama Power | Georgia Power | Mississippi Power | Southern Power | Southern Company Gas
| (in millions)
Maturity Analysis |  |  |  |  |  |
Operating leases: |  |  |  |  |  |
2024 | $ | 230 |  | $ | 16 |  | $ | 172 |  | $ | 4 |  | $ | 36 |  | $ | 12 |
2025 | 203 |  | 14 |  | 147 |  | 3 |  | 29 |  | 12 |
2026 | 180 |  | 12 |  | 142 |  | 2 |  | 29 |  | 9 |
2027 | 159 |  | 10 |  | 141 |  | — |  | 29 |  | 4 |
2028 | 143 |  | 7 |  | 135 |  | — |  | 30 |  | 3 |
Thereafter | 1,378 |  | 64 |  | 303 |  | 1 |  | 1,000 |  | 18 |
Total | 2,293 |  | 123 |  | 1,040 |  | 10 |  | 1,153 |  | 58 |
Less: Present value discount | 803 |  | 30 |  | 165 |  | 1 |  | 607 |  | 7 |
Operating lease obligations | $ | 1,490 |  | $ | 93 |  | $ | 875 |  | $ | 9 |  | $ | 546 |  | $ | 51 |
Finance leases: |  |  |  |  |  |
2024 | $ | 22 |  | $ | 2 |  | $ | 27 |  | $ | 2 |  | $ | — |  | $ | — |
2025 | 27 |  | 1 |  | 36 |  | 2 |  | — |  | — |
2026 | 27 |  | 1 |  | 36 |  | 2 |  | — |  | — |
2027 | 27 |  | 1 |  | 36 |  | 2 |  | — |  | — |
2028 | 26 |  | 1 |  | 37 |  | 1 |  | — |  | — |
Thereafter | 320 |  | — |  | 153 |  | 10 |  | — |  | — |
Total | 449 |  | 6 |  | 325 |  | 19 |  | — |  | — |
Less: Present value discount | 151 |  | 1 |  | 85 |  | 3 |  | — |  | — |
Finance lease obligations | $ | 298 |  | $ | 5 |  | $ | 240 |  | $ | 16 |  | $ | — |  | $ | — |
Maturities of finance lease liabilities | Maturities of lease liabilities are as follows:
| At December 31, 2023
| Southern Company | Alabama Power | Georgia Power | Mississippi Power | Southern Power | Southern Company Gas
| (in millions)
Maturity Analysis |  |  |  |  |  |
Operating leases: |  |  |  |  |  |
2024 | $ | 230 |  | $ | 16 |  | $ | 172 |  | $ | 4 |  | $ | 36 |  | $ | 12 |
2025 | 203 |  | 14 |  | 147 |  | 3 |  | 29 |  | 12 |
2026 | 180 |  | 12 |  | 142 |  | 2 |  | 29 |  | 9 |
2027 | 159 |  | 10 |  | 141 |  | — |  | 29 |  | 4 |
2028 | 143 |  | 7 |  | 135 |  | — |  | 30 |  | 3 |
Thereafter | 1,378 |  | 64 |  | 303 |  | 1 |  | 1,000 |  | 18 |
Total | 2,293 |  | 123 |  | 1,040 |  | 10 |  | 1,153 |  | 58 |
Less: Present value discount | 803 |  | 30 |  | 165 |  | 1 |  | 607 |  | 7 |
Operating lease obligations | $ | 1,490 |  | $ | 93 |  | $ | 875 |  | $ | 9 |  | $ | 546 |  | $ | 51 |
Finance leases: |  |  |  |  |  |
2024 | $ | 22 |  | $ | 2 |  | $ | 27 |  | $ | 2 |  | $ | — |  | $ | — |
2025 | 27 |  | 1 |  | 36 |  | 2 |  | — |  | — |
2026 | 27 |  | 1 |  | 36 |  | 2 |  | — |  | — |
2027 | 27 |  | 1 |  | 36 |  | 2 |  | — |  | — |
2028 | 26 |  | 1 |  | 37 |  | 1 |  | — |  | — |
Thereafter | 320 |  | — |  | 153 |  | 10 |  | — |  | — |
Total | 449 |  | 6 |  | 325 |  | 19 |  | — |  | — |
Less: Present value discount | 151 |  | 1 |  | 85 |  | 3 |  | — |  | — |
Finance lease obligations | $ | 298 |  | $ | 5 |  | $ | 240 |  | $ | 16 |  | $ | — |  | $ | — |
Lease income, operating leases | Lease income for 2023, 2022, and 2021, is as follows:
| Southern Company | Alabama Power | Georgia Power | Mississippi Power | Southern Power | Southern Company Gas
| (in millions)
2023 |  |  |  |  |  |
Lease income - interest income on sales-type leases | $ | 24 |  | $ | — |  | $ | — |  | $ | 14 |  | $ | 10 |  | $ | — |
Lease income - operating leases | 164 |  | 35 |  | 29 |  | 2 |  | 85 |  | 37 |
Variable lease income | 406 |  | 1 |  | — |  | — |  | 437 |  | — |
Total lease income | $ | 594 |  | $ | 36 |  | $ | 29 |  | $ | 16 |  | $ | 532 |  | $ | 37 |
2022 |  |  |  |  |  |
Lease income - interest income on sales-type leases | $ | 25 |  | $ | — |  | $ | — |  | $ | 15 |  | $ | 10 |  | $ | — |
Lease income - operating leases | 208 |  | 77 |  | 32 |  | 2 |  | 85 |  | 36 |
Variable lease income | 417 |  | 1 |  | — |  | — |  | 448 |  | — |
Total lease income | $ | 650 |  | $ | 78 |  | $ | 32 |  | $ | 17 |  | $ | 543 |  | $ | 36 |
2021 |  |  |  |  |  |
Lease income - interest income on sales-type leases | $ | 15 |  | $ | — |  | $ | — |  | $ | 14 |  | $ | 1 |  | $ | — |
Lease income - operating leases | 223 |  | 82 |  | 42 |  | 2 |  | 85 |  | 35 |
Variable lease income | 429 |  | — |  | — |  | — |  | 456 |  | — |
Total lease income | $ | 667 |  | $ | 82 |  | $ | 42 |  | $ | 16 |  | $ | 542 |  | $ | 35 |
Lease income, sales-type leases and Power Purchase Agreements | Lease income for 2023, 2022, and 2021, is as follows:
| Southern Company | Alabama Power | Georgia Power | Mississippi Power | Southern Power | Southern Company Gas
| (in millions)
2023 |  |  |  |  |  |
Lease income - interest income on sales-type leases | $ | 24 |  | $ | — |  | $ | — |  | $ | 14 |  | $ | 10 |  | $ | — |
Lease income - operating leases | 164 |  | 35 |  | 29 |  | 2 |  | 85 |  | 37 |
Variable lease income | 406 |  | 1 |  | — |  | — |  | 437 |  | — |
Total lease income | $ | 594 |  | $ | 36 |  | $ | 29 |  | $ | 16 |  | $ | 532 |  | $ | 37 |
2022 |  |  |  |  |  |
Lease income - interest income on sales-type leases | $ | 25 |  | $ | — |  | $ | — |  | $ | 15 |  | $ | 10 |  | $ | — |
Lease income - operating leases | 208 |  | 77 |  | 32 |  | 2 |  | 85 |  | 36 |
Variable lease income | 417 |  | 1 |  | — |  | — |  | 448 |  | — |
Total lease income | $ | 650 |  | $ | 78 |  | $ | 32 |  | $ | 17 |  | $ | 543 |  | $ | 36 |
2021 |  |  |  |  |  |
Lease income - interest income on sales-type leases | $ | 15 |  | $ | — |  | $ | — |  | $ | 14 |  | $ | 1 |  | $ | — |
Lease income - operating leases | 223 |  | 82 |  | 42 |  | 2 |  | 85 |  | 35 |
Variable lease income | 429 |  | — |  | — |  | — |  | 456 |  | — |
Total lease income | $ | 667 |  | $ | 82 |  | $ | 42 |  | $ | 16 |  | $ | 542 |  | $ | 35 |
Undiscounted cash flows to be received under tolling arrangements accounted for as sales-type leases | The undiscounted cash flows expected to be received for in-service leased assets under the leases are as follows:
| At December 31, 2023
| Southern Company | Mississippi Power | Southern Power
| (in millions)
2024 | $ | 38 |  | $ | 23 |  | $ | 15 |
2025 | 37 |  | 22 |  | 15 |
2026 | 36 |  | 21 |  | 15 |
2027 | 35 |  | 20 |  | 15 |
2028 | 34 |  | 19 |  | 15 |
Thereafter | 330 |  | 145 |  | 185 |
Total undiscounted cash flows | $ | 510 |  | $ | 250 |  | $ | 260 |
Net investment in sales-type lease(*) | 311 |  | 148 |  | 163 |
Difference between undiscounted cash flows and discounted cash flows | $ | 199 |  | $ | 102 |  | $ | 97 |
(*)For Mississippi Power, included in other current assets and other property and investments on the balance sheets. For Southern Power, included in other current assets ($15 million and $15 million at December 31, 2023 and 2022, respectively) and net investment in sales-type leases ($148 million and $154 million at December 31, 2023 and 2022, respectively) on the balance sheet.
Undiscounted cash flows to be received under PPAs accounted for as operating leases | The undiscounted cash flows to be received under operating leases and contracts accounted for as operating leases are as follows:
| At December 31, 2023
| Southern Company | Alabama Power |  | Southern Power | Southern Company Gas
| (in millions)
2024 | $ | 116 |  | $ | 7 |  |  | $ | 90 |  | $ | 35 |
2025 | 107 |  | 5 |  |  | 75 |  | 29 |
2026 | 108 |  | 5 |  |  | 73 |  | 29 |
2027 | 105 |  | 4 |  |  | 75 |  | 28 |
2028 | 104 |  | 3 |  |  | 76 |  | 28 |
Thereafter | 706 |  | 26 |  |  | 91 |  | 354 |
Total | $ | 1,246 |  | $ | 50 |  |  | $ | 480 |  | $ | 503 |
Summary of the components of income from leveraged leases | The following table provides a summary of the components of income related to leveraged lease investments. Income was impacted in 2021 by the impairment charges discussed below and in Note 15 under "Southern Company." Income in 2021 does not include the impacts of the sale and terminations of leveraged lease projects discussed in Note 15 under "Southern Company."
|  |  |  |  | 2021
|  |  |  |  | (in millions)
Pretax leveraged lease income |  |  |  |  | $ | 17 |
Income tax expense |  |  |  |  | (5) |
Net leveraged lease income |  |  |  |  | $ | 12 |

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- Definition Tabular disclosure of undiscounted cash flows of lessee's operating lease liability. Includes, but is not limited to, reconciliation of undiscounted cash flows to operating lease liability recognized in statement of financial position. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org//1943274/2147478964/842-20-50-6 + Details
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