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Bank Premises and Equipment (Bank Premises and Equipment (Detail)) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Property, Plant and Equipment    
Land and improvements [1] $ 586 $ 644
Buildings [1] 1,547 1,679
Equipment 1,987 1,876
Leasehold improvements 403 399
Construction in progress [1] 81 93
Land and improvements held for sale 25 17
Buildings held for sale 14 9
Equipment held for sale 3 1
Accumulated depreciation and amortization (2,785) (2,715)
Total bank premises and equipment [2] $ 1,861 $ 2,003
Building | Upper Limit    
Property, Plant and Equipment    
Useful life 30 years  
Building | Lower limit    
Property, Plant and Equipment    
Useful life 2 years  
Equipment | Upper Limit    
Property, Plant and Equipment    
Useful life 20 years  
Equipment | Lower limit    
Property, Plant and Equipment    
Useful life 2 years  
Leasehold Improvements | Upper Limit    
Property, Plant and Equipment    
Useful life 30 years  
Leasehold Improvements | Lower limit    
Property, Plant and Equipment    
Useful life 1 year  
[1]

(a) At December 31, 2018 and 2017 , land and improvements, buildings and construction in progress included $55 and $91, respectively, associated with parcels of undeveloped land intended for future branch expansion.

[2]
  • Includes $ 42 and $ 27 of bank premises and equipment held for sale at December 31, 2018 and 2017 , respectively. For further information refer to N ote 7 .