v3.26.3
REVENUE (Tables)
9 Months Ended
Sep. 30, 2026
Revenue from Contract with Customer [Abstract]  
Schedule of Disaggregation of Revenue The following table presents the disaggregation of TEP’s Operating Revenues on the Condensed Consolidated Statements of Income by type of service:
Three Months Ended September 30,Nine Months Ended September 30,
(in millions)2026202520262025
Retail$433 $434 $1,006 $994 
Wholesale75 61 165 166 
Other Services30 26 92 75 
Revenues from Contracts with Customers538 521 1,263 1,235 
Alternative Revenues1 14 18 38 
Other27 10 56 44 
Total Operating Revenues$566 $545 $1,337 $1,317