Annual report pursuant to Section 13 and 15(d)

FAIR VALUES OF ASSETS AND LIABILITIES - Recurring basis (Details)

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FAIR VALUES OF ASSETS AND LIABILITIES - Recurring basis (Details) - USD ($)
$ in Millions
Dec. 31, 2019
Dec. 31, 2018
Assets measured at fair value on a recurring basis    
Loans held for sale $ 781 $ 613
Consumer loans 81 79
Derivative assets gross 856 500
Derivative assets netting (404) (291)
Derivative assets 452 209
Liabilities measured at fair value on a recurring basis    
Gross amounts of recognized liabilities 521 404
Derivative liabilities netting (417) (217)
Derivative liabilities 104 187
Recurring    
Assets measured at fair value on a recurring basis    
Loans held for sale 781 613
Trading account securities 99 105
Available-for-sale securities 14,149 13,780
Other Securities, Fair Value 54 22
MSRs 7 10
Derivative assets netting (404) (291)
Derivative assets 452 209
Liabilities measured at fair value on a recurring basis    
Derivative liabilities netting (417) (217)
Derivative liabilities 104 187
Recurring | U.S. Treasury securities    
Assets measured at fair value on a recurring basis    
Available-for-sale securities 10 5
Recurring | Residential CMOs    
Assets measured at fair value on a recurring basis    
Available-for-sale securities 5,085 6,999
Recurring | Residential MBS    
Assets measured at fair value on a recurring basis    
Available-for-sale securities 4,222 1,255
Recurring | Commercial MBS    
Assets measured at fair value on a recurring basis    
Available-for-sale securities 976 1,583
Recurring | Other agencies    
Assets measured at fair value on a recurring basis    
Trading account securities 4  
Available-for-sale securities 165 126
Recurring | Municipal securities    
Assets measured at fair value on a recurring basis    
Trading account securities 63 28
Available-for-sale securities 3,055 3,440
Recurring | Private-label CMO    
Assets measured at fair value on a recurring basis    
Available-for-sale securities 2  
Recurring | Asset-backed securities    
Assets measured at fair value on a recurring basis    
Available-for-sale securities 579 315
Recurring | Corporate debt    
Assets measured at fair value on a recurring basis    
Available-for-sale securities 51 53
Recurring | Other securities/Sovereign debt    
Assets measured at fair value on a recurring basis    
Trading account securities 32 77
Available-for-sale securities 4 4
Recurring | Level 1    
Assets measured at fair value on a recurring basis    
Loans held for sale 0 0
Trading account securities 30 78
Available-for-sale securities 10 5
Other Securities, Fair Value 54 22
Consumer loans 0 0
MSRs 0 0
Derivative assets gross 0 21
Liabilities measured at fair value on a recurring basis    
Gross amounts of recognized liabilities 0 11
Recurring | Level 1 | U.S. Treasury securities    
Assets measured at fair value on a recurring basis    
Available-for-sale securities 10 5
Recurring | Level 1 | Residential CMOs    
Assets measured at fair value on a recurring basis    
Available-for-sale securities 0 0
Recurring | Level 1 | Residential MBS    
Assets measured at fair value on a recurring basis    
Available-for-sale securities 0  
Recurring | Level 1 | Commercial MBS    
Assets measured at fair value on a recurring basis    
Available-for-sale securities 0  
Recurring | Level 1 | Other agencies    
Assets measured at fair value on a recurring basis    
Available-for-sale securities 0 0
Recurring | Level 1 | Municipal securities    
Assets measured at fair value on a recurring basis    
Trading account securities 0 1
Available-for-sale securities 0 0
Recurring | Level 1 | Private-label CMO    
Assets measured at fair value on a recurring basis    
Available-for-sale securities 0  
Recurring | Level 1 | Asset-backed securities    
Assets measured at fair value on a recurring basis    
Available-for-sale securities 0 0
Recurring | Level 1 | Corporate debt    
Assets measured at fair value on a recurring basis    
Available-for-sale securities 0 0
Recurring | Level 1 | Other securities/Sovereign debt    
Assets measured at fair value on a recurring basis    
Trading account securities 30 77
Available-for-sale securities 0 0
Recurring | Level 2    
Assets measured at fair value on a recurring basis    
Loans held for sale 781 613
Trading account securities 69 27
Available-for-sale securities 11,090 10,610
Consumer loans 55 49
MSRs 0 0
Derivative assets gross 848 474
Liabilities measured at fair value on a recurring basis    
Gross amounts of recognized liabilities 519 390
Recurring | Level 2 | U.S. Treasury securities    
Assets measured at fair value on a recurring basis    
Available-for-sale securities 0 0
Recurring | Level 2 | Residential CMOs    
Assets measured at fair value on a recurring basis    
Available-for-sale securities 5,085 6,999
Recurring | Level 2 | Residential MBS    
Assets measured at fair value on a recurring basis    
Available-for-sale securities 4,222 1,255
Recurring | Level 2 | Commercial MBS    
Assets measured at fair value on a recurring basis    
Available-for-sale securities 976 1,583
Recurring | Level 2 | Other agencies    
Assets measured at fair value on a recurring basis    
Trading account securities 4  
Available-for-sale securities 165 126
Recurring | Level 2 | Municipal securities    
Assets measured at fair value on a recurring basis    
Trading account securities 63 27
Available-for-sale securities 56 275
Recurring | Level 2 | Private-label CMO    
Assets measured at fair value on a recurring basis    
Available-for-sale securities 0  
Recurring | Level 2 | Asset-backed securities    
Assets measured at fair value on a recurring basis    
Available-for-sale securities 531 315
Recurring | Level 2 | Corporate debt    
Assets measured at fair value on a recurring basis    
Available-for-sale securities 51 53
Recurring | Level 2 | Other securities/Sovereign debt    
Assets measured at fair value on a recurring basis    
Trading account securities 2 0
Available-for-sale securities 4 4
Recurring | Level 3    
Assets measured at fair value on a recurring basis    
Loans held for sale 0 0
Trading account securities   0
Available-for-sale securities 3,049 3,165
Consumer loans 26 30
MSRs 7 10
Derivative assets gross 8 5
Liabilities measured at fair value on a recurring basis    
Gross amounts of recognized liabilities 2 3
Recurring | Level 3 | U.S. Treasury securities    
Assets measured at fair value on a recurring basis    
Available-for-sale securities 0 0
Recurring | Level 3 | Residential CMOs    
Assets measured at fair value on a recurring basis    
Available-for-sale securities 0 0
Recurring | Level 3 | Residential MBS    
Assets measured at fair value on a recurring basis    
Available-for-sale securities 0 0
Recurring | Level 3 | Commercial MBS    
Assets measured at fair value on a recurring basis    
Available-for-sale securities 0 0
Recurring | Level 3 | Other agencies    
Assets measured at fair value on a recurring basis    
Available-for-sale securities 0 0
Recurring | Level 3 | Municipal securities    
Assets measured at fair value on a recurring basis    
Trading account securities 0 0
Available-for-sale securities 2,999 3,165
Recurring | Level 3 | Private-label CMO    
Assets measured at fair value on a recurring basis    
Available-for-sale securities 2  
Recurring | Level 3 | Asset-backed securities    
Assets measured at fair value on a recurring basis    
Available-for-sale securities 48 0
Recurring | Level 3 | Corporate debt    
Assets measured at fair value on a recurring basis    
Available-for-sale securities 0 0
Recurring | Level 3 | Other securities/Sovereign debt    
Assets measured at fair value on a recurring basis    
Trading account securities 0 0
Available-for-sale securities $ 0 $ 0