Annual report pursuant to Section 13 and 15(d)

LOANS AND LEASES AND ALLOWANCE FOR CREDIT LOSSES - ALLL Attributable to Loans by Portfolio Segment (Details)

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LOANS AND LEASES AND ALLOWANCE FOR CREDIT LOSSES - ALLL Attributable to Loans by Portfolio Segment (Details) - USD ($)
$ in Millions
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Attributable to loans collectively evaluated for impairment $ 714 $ 729    
Attributable to loans individually evaluated for impairment 69 43    
Total ALLL balance: 783 772 $ 691 $ 638
Collectively evaluated for impairment 74,149 73,714    
Financing Receivable Evaluated For Impairment 75,323 74,821    
Individually evaluated for impairment 1,174 1,107    
Commercial Portfolio Segment [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Attributable to loans collectively evaluated for impairment 491 509    
Attributable to loans individually evaluated for impairment 61 33    
Total ALLL balance: 552 542 482 451
Collectively evaluated for impairment 36,738 36,931    
Financing Receivable Evaluated For Impairment 37,338 37,447    
Individually evaluated for impairment 600 516    
Consumer        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Attributable to loans collectively evaluated for impairment 223 220    
Attributable to loans individually evaluated for impairment 8 10    
Total ALLL balance: 231 230 $ 209 $ 187
Collectively evaluated for impairment 37,411 36,783    
Financing Receivable Evaluated For Impairment 37,985 37,374    
Individually evaluated for impairment $ 574 $ 591