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Fair Value Measurements - Assets and Liabilities Measured at Fair Value on Nonrecurring Basis (Details) - Fair Value, Nonrecurring - USD ($)
$ in Millions
Dec. 31, 2023
Dec. 31, 2022
ASSETS MEASURED ON A NONRECURRING BASIS    
Collateral-dependent loans $ 104 $ 17
Other intangible assets 0 0
Accrued income and other assets 29 14
Total assets on a recurring basis at fair value 133 31
Level 1    
ASSETS MEASURED ON A NONRECURRING BASIS    
Collateral-dependent loans 0 0
Other intangible assets 0 0
Accrued income and other assets 0 0
Total assets on a recurring basis at fair value 0 0
Level 2    
ASSETS MEASURED ON A NONRECURRING BASIS    
Collateral-dependent loans 0 0
Other intangible assets 0 0
Accrued income and other assets 0 0
Total assets on a recurring basis at fair value 0 0
Level 3    
ASSETS MEASURED ON A NONRECURRING BASIS    
Collateral-dependent loans 104 17
Other intangible assets 0 0
Accrued income and other assets 29 14
Total assets on a recurring basis at fair value $ 133 $ 31