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Other Income and Other Expense (Tables)
 12 Months Ended
Dec. 31, 2021
Other Income and Expenses [Abstract]  
Detail of 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):
 
 202120202019
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 
Miscellaneous53 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.
 
The following table provides detail of APS’s other income and other expense for 2021, 2020 and 2019 (dollars in thousands):
 
 202120202019
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 
Miscellaneous40 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.