Annual report pursuant to Section 13 and 15(d)

PREMISES AND EQUIPMENT (Details)

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PREMISES AND EQUIPMENT (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Property, Plant and Equipment, Net, by Type [Abstract]      
Premises and equipment, gross $ 1,742 $ 1,709  
Less accumulated depreciation and amortization (878) (893)  
Net premises and equipment 864 816  
Property Plant and Equipment Income Statement Disclosures [Abstract]      
Total depreciation and amortization of premises and equipment 123 126 $ 86
Rental income credited to occupancy expense 14 13 $ 13
Land and land improvements      
Property, Plant and Equipment, Net, by Type [Abstract]      
Premises and equipment, gross 193 199  
Buildings      
Property, Plant and Equipment, Net, by Type [Abstract]      
Premises and equipment, gross 563 523  
Leasehold improvements      
Property, Plant and Equipment, Net, by Type [Abstract]      
Premises and equipment, gross 240 265  
Equipment      
Property, Plant and Equipment, Net, by Type [Abstract]      
Premises and equipment, gross $ 746 $ 722