Annual report pursuant to Section 13 and 15(d)

FAIR VALUES OF ASSETS AND LIABILITIES - Fair Value Option (Details)

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FAIR VALUES OF ASSETS AND LIABILITIES - Fair Value Option (Details) - USD ($)
$ in Millions
Dec. 31, 2022
Dec. 31, 2021
Fair Value, Option, Quantitative Disclosures [Line Items]    
Loans held for sale, fair value $ 520 $ 1,270
Loans held for investment, fair value 185 171
Fair Value, Recurring    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Loans held for sale, fair value 520 1,270
Loans held for investment, fair value 185 171
Fair Value, Recurring | Loans held for sale    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Loans held for sale, aggregate unpaid principal 513 1,237
Difference 7 33
Fair Value, Recurring | Loans held for investment    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Loans held for investment, fair value 185 171
Loans held for investment, aggregate unpaid principal 190 177
Difference (5) (6)
Fair Value, Recurring | 90 or more days | Loans held for sale    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Loans held for sale, fair value 0 0
Loans held for sale, aggregate unpaid principal 0 0
Difference 0 0
Fair Value, Recurring | 90 or more days | Loans held for investment    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Loans held for investment, fair value 11 4
Loans held for investment, aggregate unpaid principal 11 4
Difference $ 0 $ 0