XML 37 R26.htm IDEA: XBRL DOCUMENT v3.22.0.1
REVENUE (Tables)
 12 Months Ended
Dec. 31, 2021
Revenue from Contract with Customer [Abstract]  
Disaggregation of revenue The following table presents the disaggregation of TEP’s Operating Revenues on the Consolidated Statements of Income by type of service:
Years Ended December 31,
(in millions)202120202019
Retail$1,088 $1,039 $972 
Wholesale278 190 247 
Other Services114 95 124 
Revenues from Contracts with Customers1,480 1,324 1,343 
Alternative Revenues12 48 35 
Other101 53 40 
Total Operating Revenues$1,593 $1,425 $1,418