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Introduction - Schedule of Other Intangible Assets (Details) - USD ($) $ in Millions | Jun. 30, 2023 | Dec. 31, 2022
--- | --- | ---
Subject to amortization: |  |
Gross Carrying Amount | $ 669 | $ 671
Accumulated Amortization | (358) | (340)
Other Intangible Assets, Net | 311 | 331
Not subject to amortization: |  |
FCC licenses | 75 | 75
Total other intangible assets |  |
Gross Carrying Amount | 744 | 746
Accumulated Amortization | (358) | (340)
Other Intangible Assets, Net | 386 | 406
Customer relationships |  |
Subject to amortization: |  |
Gross Carrying Amount | 212 | 212
Accumulated Amortization | (167) | (162)
Other Intangible Assets, Net | 45 | 50
Total other intangible assets |  |
Accumulated Amortization | (167) | (162)
Trade names |  |
Subject to amortization: |  |
Gross Carrying Amount | 64 | 64
Accumulated Amortization | (49) | (44)
Other Intangible Assets, Net | 15 | 20
Total other intangible assets |  |
Accumulated Amortization | (49) | (44)
PPA fair value adjustments |  |
Subject to amortization: |  |
Gross Carrying Amount | 390 | 390
Accumulated Amortization | (139) | (129)
Other Intangible Assets, Net | 251 | 261
Total other intangible assets |  |
Accumulated Amortization | (139) | (129)
Other |  |
Subject to amortization: |  |
Gross Carrying Amount | 3 | 5
Accumulated Amortization | (3) | (5)
Other Intangible Assets, Net | 0 | 0
Total other intangible assets |  |
Accumulated Amortization | (3) | (5)
SOUTHERN POWER CO |  |
Subject to amortization: |  |
Accumulated Amortization | (139) | (129)
Total other intangible assets |  |
Accumulated Amortization | (139) | (129)
SOUTHERN POWER CO | PPA fair value adjustments |  |
Subject to amortization: |  |
Gross Carrying Amount | 390 | 390
Accumulated Amortization | (139) | (129)
Other Intangible Assets, Net | 251 | 261
Total other intangible assets |  |
Accumulated Amortization | (139) | (129)
SOUTHERN Co GAS |  |
Subject to amortization: |  |
Gross Carrying Amount | 182 | 182
Accumulated Amortization | (161) | (156)
Other Intangible Assets, Net | 21 | 26
Total other intangible assets |  |
Accumulated Amortization | (161) | (156)
Other Intangible Assets, Net | 21 | 26
SOUTHERN Co GAS | Customer relationships |  |
Subject to amortization: |  |
Gross Carrying Amount | 156 | 156
Accumulated Amortization | (142) | (139)
Other Intangible Assets, Net | 14 | 17
Total other intangible assets |  |
Accumulated Amortization | (142) | (139)
SOUTHERN Co GAS | Trade names |  |
Subject to amortization: |  |
Gross Carrying Amount | 26 | 26
Accumulated Amortization | (19) | (17)
Other Intangible Assets, Net | 7 | 9
Total other intangible assets |  |
Accumulated Amortization | $ (19) | $ (17)

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