v3.24.0.1
COMMITMENTS AND CONTINGENCIES (Tables)
 12 Months Ended
Dec. 31, 2023
Commitments and Contingencies Disclosure [Abstract]  
Commitments
As of December 31, 2023, TEP had the following commitments:
(in millions)20242025202620272028ThereafterTotal
Minimum Purchase Commitments
Fuel, Including Transportation$68 $67 $63 $63 $54 $226 $541 
Purchased Power26 4 — — — — 30 
Transmission28 26 9 1 1 2 67 
Purchase Commitments
Renewable Power Purchase Agreements and Other84 84 79 79 79 689 1,094 
RES Performance-Based Incentives7 5 5 4 4 15 40 
Total Commitments$213 $186 $156 $147 $138 $932 $1,772