XML 116 R97.htm IDEA: XBRL DOCUMENT v3.8.0.1
Intangible Assets - Intangible Assets (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Finite-Lived Intangible Assets [Line Items]        
Goodwill $ 9,434 $ 9,344 $ 9,361 $ 9,389
Mortgage servicing rights 2,645 2,591 $ 2,512 $ 2,338
Total $ 12,662 12,647    
Merchant Processing Contracts [Member]        
Finite-Lived Intangible Assets [Line Items]        
Amortization Method SL/AC      
Finite-Lived Intangible Assets $ 89 108    
Core Deposit Benefits [Member]        
Finite-Lived Intangible Assets [Line Items]        
Amortization Method SL/AC      
Finite-Lived Intangible Assets $ 131 161    
Trust Relationships [Member]        
Finite-Lived Intangible Assets [Line Items]        
Amortization Method SL/AC      
Finite-Lived Intangible Assets $ 45 59    
Other Identified Intangibles [Member]        
Finite-Lived Intangible Assets [Line Items]        
Amortization Method SL/AC      
Finite-Lived Intangible Assets $ 318 $ 384    
Straight line method [Member] | Merchant Processing Contracts [Member]        
Finite-Lived Intangible Assets [Line Items]        
Estimated Life 7 years      
Straight line method [Member] | Core Deposit Benefits [Member]        
Finite-Lived Intangible Assets [Line Items]        
Estimated Life 22 years      
Straight line method [Member] | Trust Relationships [Member]        
Finite-Lived Intangible Assets [Line Items]        
Estimated Life 10 years      
Straight line method [Member] | Other Identified Intangibles [Member]        
Finite-Lived Intangible Assets [Line Items]        
Estimated Life 6 years      
Accelerated method [Member] | Merchant Processing Contracts [Member]        
Finite-Lived Intangible Assets [Line Items]        
Estimated Life 8 years      
Accelerated method [Member] | Core Deposit Benefits [Member]        
Finite-Lived Intangible Assets [Line Items]        
Estimated Life 5 years      
Accelerated method [Member] | Trust Relationships [Member]        
Finite-Lived Intangible Assets [Line Items]        
Estimated Life 7 years      
Accelerated method [Member] | Other Identified Intangibles [Member]        
Finite-Lived Intangible Assets [Line Items]        
Estimated Life 4 years