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Other Income and Other Expense
 12 Months Ended
Dec. 31, 2020
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 2020, 2019 and 2018 (dollars in thousands):
 
 202020192018
Other income:   
Interest income$12,210 $10,377 $8,647 
Investment gains (losses) — net2,358 — — 
Debt return on Four Corners SCR deferral (Note 4)26,121 19,541 16,153 
Debt return on Ocotillo modernization project (Note 4)15,865 20,282 — 
Miscellaneous149 63 96 
Total other income$56,703 $50,263 $24,896 
Other expense:   
Non-operating costs$(12,400)$(10,663)$(10,076)
Investment gains (losses) — net— (1,835)(417)
Miscellaneous(45,376)(a)(5,382)(7,473)
Total other expense$(57,776)$(17,880)$(17,966)
 
(a)Miscellaneous includes donation 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 2020, 2019 and 2018 (dollars in thousands):
 
 202020192018
Other income:   
Interest income$9,621 $6,998 $6,496 
Debt return on Four Corners SCR deferral (Note 4)26,121 19,541 16,153 
Debt return on Ocotillo modernization project (Note 4)15,865 20,282 — 
Miscellaneous148 63 97 
Total other income$51,755 $46,884 $22,746 
Other expense:   
Non-operating costs$(10,659)$(9,612)$(9,462)
Miscellaneous(43,035)(a)(3,378)(5,830)
Total other expense$(53,694)$(12,990)$(15,292)
(a)Miscellaneous includes donations of approximately $10 million to the APS Foundation and approximately $25.2 million related to the CCT plan (see Note 4).