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Other Income and Other Expense | 12 Months Ended
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Dec. 31, 2021
Other Income and Expenses [Abstract] |
Other Income and Other Expense | Other Income and Other Expense The following table provides detail of Pinnacle West’s Consolidated other income and other expense for 2021, 2020 and 2019 (dollars in thousands):
| 2021 |  | 2020 |  | 2019
Other income: |  |  |  |  |
Interest income | $ | 6,726 |  |  | $ | 12,210 |  |  | $ | 10,377 |
Investment gains (losses) — net | — |  |  | 2,358 |  |  | — |
Debt return on Four Corners SCR deferral (Note 4) | 14,955 |  |  | 15,865 |  |  | 19,541 |
Debt return on Ocotillo modernization project (Note 4) | 23,366 |  |  | 26,121 |  |  | 20,282 |
Miscellaneous | 53 |  |  | 149 |  |  | 63 |
Total other income | $ | 45,100 |  |  | $ | 56,703 |  |  | $ | 50,263 |
Other expense: |  |  |  |  |
Non-operating costs | $ | (13,008) |  |  | $ | (12,400) |  |  | $ | (10,663) |
Investment gains (losses) — net | (1,367) |  |  | — |  |  | (1,835) |
Miscellaneous | (11,021) |  |  | (45,376) |  | (a) | (5,382) |
Total other expense | $ | (25,396) |  |  | $ | (57,776) |  |  | $ | (17,880) |
(a)The 2020 miscellaneous amount includes donations of approximately $10 million to the APS Foundation and approximately $25.2 million related to the CCT plan. See Note 4. Other Income and Other Expense - APS The following table provides detail of APS’s other income and other expense for 2021, 2020 and 2019 (dollars in thousands):
| 2021 |  | 2020 |  | 2019
Other income: |  |  |  |  |
Interest income | $ | 4,692 |  |  | $ | 9,621 |  |  | $ | 6,998 |
Debt return on Four Corners SCR deferral (Note 4) | 14,955 |  |  | 15,865 |  |  | 19,541 |
Debt return on Ocotillo modernization project (Note 4) | 23,366 |  |  | 26,121 |  |  | 20,282 |
Miscellaneous | 40 |  |  | 148 |  |  | 63 |
Total other income | $ | 43,053 |  |  | $ | 51,755 |  |  | $ | 46,884 |
Other expense: |  |  |  |  |
Non-operating costs | $ | (10,080) |  |  | $ | (10,659) |  |  | $ | (9,612) |
Miscellaneous | (8,817) |  |  | (43,035) |  | (a) | (3,378) |
Total other expense | $ | (18,897) |  |  | $ | (53,694) |  |  | $ | (12,990) |
(a)The 2020 miscellaneous amount includes donations of approximately $10 million to the APS Foundation and approximately $25.2 million related to the CCT plan. See Note 4.

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- Definition The entire disclosure for other income or other expense items (both operating and nonoperating). Sources of nonoperating income or nonoperating expense that may be disclosed, include amounts earned from dividends, interest on securities, profits (losses) on securities, net and miscellaneous other income or income deductions. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 720 -URI http://asc.fasb.org/topic&trid=2122503 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 610 -URI http://asc.fasb.org/topic&trid=49130413 + Details
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