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Other Income and Other Expense (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Other income: |  |  |
Interest income | $ 27,242 | $ 7,326 | $ 6,726
Gain on Sale of BCE (Note 20) | 6,205 | 0 | 0
Miscellaneous | 219 | 590 | 53
Total other income | 33,666 | 7,916 | 45,100
Other expense: |  |  |
Non-operating costs | (15,260) | (18,619) | (13,008)
Investment gains (losses) — net | (3,402) | (20,537) | (1,367)
Miscellaneous | (6,394) | (13,229) | (11,021)
Total other expense | (25,056) | (52,385) | (25,396)
Arizona Public Service Company |  |  |
Other income: |  |  |
Interest income | 26,853 | 5,332 | 4,692
Miscellaneous | 219 | 556 | 40
Total other income | 27,072 | 5,888 | 43,053
Other expense: |  |  |
Non-operating costs | (14,070) | (15,579) | (10,080)
Miscellaneous | (4,194) | (10,529) | (8,817)
Total other expense | (18,264) | (26,108) | (18,897)
ACC | Navajo Nation, Electrification Projects | Coal Community Transition Plan |  |  |
Other expense: |  |  |
Amount funded by shareholders |  | 7,000 |
SCR deferral |  |  |
Other income: |  |  |
Debt return |  |  | 14,955
SCR deferral | Arizona Public Service Company |  |  |
Other income: |  |  |
Debt return | 0 | 0 | 14,955
Octotillo modernization project |  |  |
Other income: |  |  |
Debt return |  |  | 23,366
Octotillo modernization project | Arizona Public Service Company |  |  |
Other income: |  |  |
Debt return | $ 0 | $ 0 | $ 23,366

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