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Other Income and Other Expense (Details) - USD ($) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019 | Nov. 06, 2020
Other income: |  |  |  |
Interest income | $ 6,726,000 | $ 12,210,000 | $ 10,377,000 |
Investment gains (losses) — net | 0 | 2,358,000 | 0 |
Miscellaneous | 53,000 | 149,000 | 63,000 |
Total other income | 45,100,000 | 56,703,000 | 50,263,000 |
Other expense: |  |  |  |
Non-operating costs | (13,008,000) | (12,400,000) | (10,663,000) |
Investment gains (losses) — net | (1,367,000) | 0 | (1,835,000) |
Miscellaneous | (11,021,000) | (45,376,000) | (5,382,000) |
Total other expense | (25,396,000) | (57,776,000) | (17,880,000) |
Arizona Public Service Company |  |  |  |
Other income: |  |  |  |
Interest income | 4,692,000 | 9,621,000 | 6,998,000 |
Miscellaneous | 40,000 | 148,000 | 63,000 |
Total other income | 43,053,000 | 51,755,000 | 46,884,000 |
Other expense: |  |  |  |
Non-operating costs | (10,080,000) | (10,659,000) | (9,612,000) |
Miscellaneous | (8,817,000) | (43,035,000) | (3,378,000) |
Total other expense | (18,897,000) | (53,694,000) | (12,990,000) |
ACC | Coal Community Transition Plan |  |  |  |
Other expense: |  |  |  |
Amount funded by shareholders |  | 25,200,000 |  | $ 25,000,000
ACC | Navajo Nation, Electrification Projects | Coal Community Transition Plan |  |  |  |
Other expense: |  |  |  |
Amount funded by shareholders |  | 10,000,000 |  | $ 10,000,000
SCR deferral |  |  |  |
Other income: |  |  |  |
Debt return | 14,955,000 | 15,865,000 | 19,541,000 |
SCR deferral | Arizona Public Service Company |  |  |  |
Other income: |  |  |  |
Debt return | 14,955,000 | 15,865,000 | 19,541,000 |
Octotillo modernization project |  |  |  |
Other income: |  |  |  |
Debt return | 23,366,000 | 26,121,000 | 20,282,000 |
Octotillo modernization project | Arizona Public Service Company |  |  |  |
Other income: |  |  |  |
Debt return | $ 23,366,000 | $ 26,121,000 | $ 20,282,000 |

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