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Revenue (Tables)
 9 Months Ended
Sep. 30, 2024
Revenue from Contract with Customer [Abstract]  
Schedule of Disaggregation of Revenue
The following table provides detail of Pinnacle West’s consolidated revenue disaggregated by revenue sources (dollars in thousands):
Three Months Ended September 30,Nine Months Ended September 30,
2024202320242023
Retail Electric Service
Residential$966,557 $883,393 $2,057,407 $1,835,432 
Non-Residential721,644 649,164 1,792,998 1,572,013 
Wholesale Energy Sales39,303 57,801 76,428 180,686 
Transmission Services for Others38,705 43,286 93,958 108,229 
Other Sources2,592 4,115 8,716 8,057 
Total Operating Revenues$1,768,801 $1,637,759 $4,029,507 $3,704,417 
Schedule of Accounts Receivable
The following table provides a rollforward of Pinnacle West’s allowance for doubtful accounts (dollars in thousands):
September 30, 2024December 31, 2023
Balance at beginning of period$22,433 $23,778 
Bad debt expense22,284 23,399 
Actual write-offs(26,370)(24,744)
Balance at end of period$18,347 $22,433