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SHARE-BASED COMPENSATION (Tables)
12 Months Ended
Dec. 31, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Disclosure of Share-based Compensation Arrangements by Share-based Payment Award [Table Text Block]
UNS Energy awarded PSUs and RSUs as follows:
 
2016
 
2015
PSUs
66,974

 
47,776
RSUs
33,488

 
23,888