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Other Income and Other Expense | 12 Months Ended
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Dec. 31, 2019
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 2019, 2018 and 2017 (dollars in thousands):
| 2019 |  | 2018 |  | 2017
Other income: |  |  |  |  |  |  |  |
Interest income | $ | 10,377 |  |  | $ | 8,647 |  |  | $ | 3,497 |
Debt return on Four Corners SCR deferral (Note 4) | 19,541 |  |  | 16,153 |  |  | 354 |
Debt return on Ocotillo modernization project (Note 4) | 20,282 |  |  | — |  |  | — |
Miscellaneous | 63 |  |  | 96 |  |  | 155 |
Total other income | $ | 50,263 |  |  | $ | 24,896 |  |  | $ | 4,006 |
Other expense: |  |  |  |  |  |  |  |
Non-operating costs | $ | (10,663 | ) |  | $ | (10,076 | ) |  | $ | (11,749 | )
Investment losses — net | (1,835 | ) |  | (417 | ) |  | (4,113 | )
Miscellaneous | (5,382 | ) |  | (7,473 | ) |  | (5,677 | )
Total other expense | $ | (17,880 | ) |  | $ | (17,966 | ) |  | $ | (21,539 | )
Other Income and Other Expense - APS The following table provides detail of APS’s other income and other expense for 2019, 2018 and 2017 (dollars in thousands):
| 2019 |  | 2018 |  | 2017
Other income: |  |  |  |  |  |  |  |
Interest income | $ | 6,998 |  |  | $ | 6,496 |  |  | $ | 2,504 |
Debt return on Four Corners SCR deferral (Note 4) | 19,541 |  |  | 16,153 |  |  | 354 |
Debt return on Ocotillo modernization project (Note 4) | 20,282 |  |  | — |  |  | — |
Miscellaneous | 63 |  |  | 97 |  |  | 155 |
Total other income | $ | 46,884 |  |  | $ | 22,746 |  |  | $ | 3,013 |
Other expense: |  |  |  |  |  |  |  |
Non-operating costs | $ | (9,612 | ) |  | $ | (9,462 | ) |  | $ | (10,825 | )
Miscellaneous | (3,378 | ) |  | (5,830 | ) |  | (3,088 | )
Total other expense | $ | (12,990 | ) |  | $ | (15,292 | ) |  | $ | (13,913 | )

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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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