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Other Income and Other Expense (Tables)
 12 Months Ended
Dec. 31, 2023
Other Income and Expenses [Abstract]  
Schedule of other income and other expense
The following table provides detail of Pinnacle West’s Consolidated other income and other expense for 2023, 2022 and 2021 (dollars in thousands):
 202320222021
Other income:   
Interest income$27,242 (a)$7,326 $6,726 
Gain on Sale of BCE (Note 20)
6,205 — — 
Debt return on Four Corners SCR deferral (Note 3)
— — 14,955 
Debt return on Ocotillo modernization project (Note 3)
— — 23,366 
Miscellaneous219 590 53 
Total other income$33,666 $7,916 $45,100 
Other expense:   
Non-operating costs$(15,260)$(18,619)$(13,008)
Investment gains (losses) — net(3,402)(20,537)(b)(1,367)
Miscellaneous(6,394)(13,229)(c)(11,021)
Total other expense$(25,056)$(52,385)$(25,396)
(a)The 2023 interest income is primarily related to PSA Interest. See Note 3.
(b)The 2022 investment loss is primarily related to an impairment of PNW Power’s Clear Creek wind farm investment. See Note 10.
(c)The 2022 miscellaneous amount includes donations of $7 million to the APS Foundation.
The following table provides detail of APS’s other income and other expense for 2023, 2022 and 2021 (dollars in thousands):
 202320222021
Other income:   
Interest income$26,853 (a)$5,332 $4,692 
Debt return on Four Corners SCR deferral (Note 3)
— — 14,955 
Debt return on Ocotillo modernization project (Note 3)
— — 23,366 
Miscellaneous219 556 40 
Total other income$27,072 $5,888 $43,053 
Other expense:   
Non-operating costs$(14,070)$(15,579)$(10,080)
Miscellaneous(4,194)(10,529)(b)(8,817)
Total other expense$(18,264)$(26,108)$(18,897)
(a)The 2023 interest income is primarily related to PSA Interest. See Note 3.
(b)The 2022 miscellaneous amount includes donations of $7 million to the APS Foundation.