Quarterly report pursuant to Section 13 or 15(d)

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

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LOANS / LEASES AND ALLOWANCE FOR CREDIT LOSSES - ALLL Attributable to Loans by Portfolio Segment (Details) - USD ($)
$ in Millions
Sep. 30, 2018
Jun. 30, 2018
Dec. 31, 2017
Sep. 30, 2017
Jun. 30, 2017
Dec. 31, 2016
Portion of ALLL balance:            
Attributable to loans individually evaluated for impairment $ 56   $ 41      
Attributable to loans collectively evaluated for impairment 705   650      
Total ALLL balance 761 $ 741 691 $ 675 $ 668 $ 638
Portion of loan and lease ending balance:            
Collectively evaluated for impairment 72,068   68,760      
Individually evaluated for impairment 1,221   1,223      
Financing Receivable Evaluated For Impairment 73,289   70,024      
Commercial            
Portion of ALLL balance:            
Attributable to loans individually evaluated for impairment 46   32      
Attributable to loans collectively evaluated for impairment 497   450      
Total ALLL balance 543 531 482 474 475 451
Portion of loan and lease ending balance:            
Collectively evaluated for impairment 35,646   34,684      
Individually evaluated for impairment 623   607      
Financing Receivable Evaluated For Impairment 36,269   35,332      
Consumer            
Portion of ALLL balance:            
Attributable to loans individually evaluated for impairment 10   9      
Attributable to loans collectively evaluated for impairment 208   200      
Total ALLL balance 218 $ 210 209 $ 201 $ 193 $ 187
Portion of loan and lease ending balance:            
Collectively evaluated for impairment 36,422   34,076      
Individually evaluated for impairment 598   616      
Financing Receivable Evaluated For Impairment $ 37,020   34,692      
Purchased credit-impaired            
Portion of loan and lease ending balance:            
Collectively evaluated for impairment     41      
Purchased credit-impaired | Commercial            
Portion of loan and lease ending balance:            
Collectively evaluated for impairment     41      
Purchased credit-impaired | Consumer            
Portion of loan and lease ending balance:            
Collectively evaluated for impairment     $ 0