XML 43 R29.htm IDEA: XBRL DOCUMENT v3.7.0.1
THE MERGER (Details) - USD ($)
3 Months Ended
Oct. 14, 2016
Apr. 20, 2016
Mar. 31, 2017
Mar. 31, 2016
Certain Internal Labor and Associated Costs        
The Merger        
Merger related expenses     $ 1,000,000 $ 3,000,000
External Legal, Advisory and Financial Services Fees        
The Merger        
Merger related expenses       $ 10,000,000
GIC Private Limited        
The Merger        
Ownership percentage of minority investor upon completion of merger   19.90%    
Business acquisition, cash consideration   $ 1,228,000,000    
ITC Holdings        
The Merger        
Cash per common share $ 22.57      
Fortis stock per common share $ 0.7520      
Ownership percentage of Fortis after close of merger 27.00%      
Merger consideration share-based compensation awards $ 45.72