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, 2023
Dec. 31, 2022
Assets measured at fair value on a recurring basis    
Available-for-sale securities $ 25,305 $ 23,423
Loans held for sale 506 520
Loans held for investment 174 185
Derivative assets gross 1,723 2,164
Derivative assets netting (1,330) (1,808)
Derivative assets 393 356
Total short-term borrowings 620 2,027
Liabilities measured at fair value on a recurring basis    
Gross amounts of recognized liabilities 1,421 2,337
Derivative liabilities netting (751) (1,345)
Derivative liabilities 670 992
U.S. Treasury securities    
Assets measured at fair value on a recurring basis    
Available-for-sale securities 2,856 103
Residential MBS    
Assets measured at fair value on a recurring basis    
Available-for-sale securities 11,382 12,263
Commercial MBS    
Assets measured at fair value on a recurring basis    
Available-for-sale securities 1,827 1,953
Other agencies    
Assets measured at fair value on a recurring basis    
Available-for-sale securities 155 182
Municipal securities    
Assets measured at fair value on a recurring basis    
Available-for-sale securities 3,373 3,290
Private-label CMO    
Assets measured at fair value on a recurring basis    
Available-for-sale securities 119 128
Asset-backed securities    
Assets measured at fair value on a recurring basis    
Available-for-sale securities 356 372
Corporate debt    
Assets measured at fair value on a recurring basis    
Available-for-sale securities 2,043 2,214
Recurring    
Assets measured at fair value on a recurring basis    
Trading account securities 125  
Available-for-sale securities 25,305 23,423
Other securities 32 32
Loans held for sale 506 520
Loans held for investment 174 185
MSRs 515 494
Derivative assets netting (1,330) (1,808)
Derivative assets 393 356
Assets held in trust for deferred compensation plans 177 155
Liabilities measured at fair value on a recurring basis    
Derivative liabilities netting (751) (1,345)
Derivative liabilities 670 992
Recurring | U.S. Treasury securities    
Assets measured at fair value on a recurring basis    
Trading account securities 91  
Available-for-sale securities 2,856 103
Recurring | Residential CMO    
Assets measured at fair value on a recurring basis    
Available-for-sale securities 3,184 2,914
Recurring | Residential MBS    
Assets measured at fair value on a recurring basis    
Available-for-sale securities 11,382 12,263
Recurring | Commercial MBS    
Assets measured at fair value on a recurring basis    
Available-for-sale securities 1,827 1,953
Recurring | Other agencies    
Assets measured at fair value on a recurring basis    
Trading account securities 2  
Available-for-sale securities 155 182
Recurring | Municipal securities    
Assets measured at fair value on a recurring basis    
Trading account securities 32 19
Available-for-sale securities 3,373 3,290
Recurring | Private-label CMO    
Assets measured at fair value on a recurring basis    
Available-for-sale securities 119 128
Recurring | Asset-backed securities    
Assets measured at fair value on a recurring basis    
Available-for-sale securities 356 372
Recurring | Corporate debt    
Assets measured at fair value on a recurring basis    
Available-for-sale securities 2,043 2,214
Recurring | Other securities/Sovereign debt    
Assets measured at fair value on a recurring basis    
Available-for-sale securities 10 4
Recurring | Level 1    
Assets measured at fair value on a recurring basis    
Trading account securities 91  
Available-for-sale securities 2,856 103
Other securities 30 31
Loans held for sale 0 0
Loans held for investment 0 0
MSRs 0 0
Derivative assets gross 0 0
Assets held in trust for deferred compensation plans 177 155
Liabilities measured at fair value on a recurring basis    
Gross amounts of recognized liabilities 0 0
Recurring | Level 1 | U.S. Treasury securities    
Assets measured at fair value on a recurring basis    
Trading account securities 91  
Available-for-sale securities 2,856 103
Recurring | Level 1 | Residential CMO    
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 0
Recurring | Level 1 | Commercial MBS    
Assets measured at fair value on a recurring basis    
Available-for-sale securities 0 0
Recurring | Level 1 | Other agencies    
Assets measured at fair value on a recurring basis    
Trading account securities 0  
Available-for-sale securities 0 0
Recurring | Level 1 | Municipal securities    
Assets measured at fair value on a recurring basis    
Trading account securities 0 0
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 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    
Available-for-sale securities 0 0
Recurring | Level 2    
Assets measured at fair value on a recurring basis    
Trading account securities 34  
Available-for-sale securities 19,019 19,978
Other securities 2 1
Loans held for sale 506 520
Loans held for investment 120 169
MSRs 0 0
Derivative assets gross 1,720 2,161
Assets held in trust for deferred compensation plans 0 0
Liabilities measured at fair value on a recurring basis    
Gross amounts of recognized liabilities 1,416 2,332
Recurring | Level 2 | U.S. Treasury securities    
Assets measured at fair value on a recurring basis    
Trading account securities 0  
Available-for-sale securities 0 0
Recurring | Level 2 | Residential CMO    
Assets measured at fair value on a recurring basis    
Available-for-sale securities 3,184 2,914
Recurring | Level 2 | Residential MBS    
Assets measured at fair value on a recurring basis    
Available-for-sale securities 11,382 12,263
Recurring | Level 2 | Commercial MBS    
Assets measured at fair value on a recurring basis    
Available-for-sale securities 1,827 1,953
Recurring | Level 2 | Other agencies    
Assets measured at fair value on a recurring basis    
Trading account securities 2  
Available-for-sale securities 155 182
Recurring | Level 2 | Municipal securities    
Assets measured at fair value on a recurring basis    
Trading account securities 32 19
Available-for-sale securities 38 42
Recurring | Level 2 | Private-label CMO    
Assets measured at fair value on a recurring basis    
Available-for-sale securities 99 108
Recurring | Level 2 | Asset-backed securities    
Assets measured at fair value on a recurring basis    
Available-for-sale securities 281 298
Recurring | Level 2 | Corporate debt    
Assets measured at fair value on a recurring basis    
Available-for-sale securities 2,043 2,214
Recurring | Level 2 | Other securities/Sovereign debt    
Assets measured at fair value on a recurring basis    
Available-for-sale securities 10 4
Recurring | Level 3    
Assets measured at fair value on a recurring basis    
Trading account securities 0  
Available-for-sale securities 3,430 3,342
Other securities 0 0
Loans held for sale 0 0
Loans held for investment 54 16
MSRs 515 494
Derivative assets gross 3 3
Assets held in trust for deferred compensation plans 0 0
Liabilities measured at fair value on a recurring basis    
Gross amounts of recognized liabilities 5 5
Recurring | Level 3 | U.S. Treasury securities    
Assets measured at fair value on a recurring basis    
Trading account securities 0  
Available-for-sale securities 0 0
Recurring | Level 3 | Residential CMO    
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    
Trading account securities 0  
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 3,335 3,248
Recurring | Level 3 | Private-label CMO    
Assets measured at fair value on a recurring basis    
Available-for-sale securities 20 20
Recurring | Level 3 | Asset-backed securities    
Assets measured at fair value on a recurring basis    
Available-for-sale securities 75 74
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    
Available-for-sale securities $ 0 $ 0