Annual report pursuant to Section 13 and 15(d)

BORROWINGS - Schedule of Short-Term Debt (Details)

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BORROWINGS - Schedule of Short-Term Debt (Details) - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Short-term Debt [Line Items]    
Total short-term borrowings $ 334 $ 183
Federal funds purchased and securities sold under agreements to repurchase    
Short-term Debt [Line Items]    
Total short-term borrowings 320 71
Other borrowings    
Short-term Debt [Line Items]    
Total short-term borrowings $ 14 $ 112