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SHARE-BASED COMPENSATION (Tables)
9 Months Ended
Sep. 30, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Disclosure of Share-based Compensation Arrangements by Share-based Payment Award [Table Text Block]
On March 8, 2017, ITC Holdings granted the following number of PBUs and SBUs under the Plan:
 
 
Total
PBUs
 
333,579

SBUs
 
259,053