Annual report pursuant to Section 13 and 15(d)

FAIR VALUES OF ASSETS AND LIABILITIES - Significant Unobservable Level 3 Inputs (Details)

v3.24.0.1
FAIR VALUES OF ASSETS AND LIABILITIES - Significant Unobservable Level 3 Inputs (Details)
$ in Millions
Dec. 31, 2023
USD ($)
Dec. 31, 2022
USD ($)
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]    
Derivative assets gross $ 1,723 $ 2,164
Recurring    
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]    
MSRs 515 494
Recurring | Level 3    
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]    
MSRs 515 494
Derivative assets gross $ 3 $ 3
Residential MBS | Measurement Input, Constant Prepayment Rate | Recurring | Maximum | Valuation Technique, Discounted Cash Flow | Level 3    
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]    
Servicing Asset, Measurement Input 0.37 0.40
Residential MBS | Measurement Input, Constant Prepayment Rate | Recurring | Minimum | Valuation Technique, Discounted Cash Flow | Level 3    
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]    
Servicing Asset, Measurement Input 0.04 0.05
Residential MBS | Measurement Input, Constant Prepayment Rate | Recurring | Weighted Average | Valuation Technique, Discounted Cash Flow | Level 3    
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]    
Servicing Asset, Measurement Input 0.09 0.07
Residential MBS | Measurement Input, Option Adjusted Spread | Recurring | Maximum | Valuation Technique, Discounted Cash Flow | Level 3    
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]    
Servicing Asset, Measurement Input 0.13 0.13
Residential MBS | Measurement Input, Option Adjusted Spread | Recurring | Minimum | Valuation Technique, Discounted Cash Flow | Level 3    
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]    
Servicing Asset, Measurement Input 0.05 0.05
Residential MBS | Measurement Input, Option Adjusted Spread | Recurring | Weighted Average | Valuation Technique, Discounted Cash Flow | Level 3    
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]    
Servicing Asset, Measurement Input 0.05 0.06
Corporate obligations | Measurement Input, Discount Rate | Recurring | Maximum | Valuation Technique, Discounted Cash Flow | Level 3    
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]    
Debt Securities, Available-for-sale, Measurement Input 0.06 0.05
Corporate obligations | Measurement Input, Discount Rate | Recurring | Minimum | Valuation Technique, Discounted Cash Flow | Level 3    
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]    
Debt Securities, Available-for-sale, Measurement Input 0.04 0.05
Corporate obligations | Measurement Input, Discount Rate | Recurring | Weighted Average | Valuation Technique, Discounted Cash Flow | Level 3    
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]    
Debt Securities, Available-for-sale, Measurement Input 0.05 0.05
Corporate obligations | Measurement Input, Default Rate | Recurring | Maximum | Valuation Technique, Discounted Cash Flow | Level 3    
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]    
Debt Securities, Available-for-sale, Measurement Input 0.64 0.64
Corporate obligations | Measurement Input, Default Rate | Recurring | Minimum | Valuation Technique, Discounted Cash Flow | Level 3    
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]    
Debt Securities, Available-for-sale, Measurement Input 0 0
Corporate obligations | Measurement Input, Default Rate | Recurring | Weighted Average | Valuation Technique, Discounted Cash Flow | Level 3    
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]    
Debt Securities, Available-for-sale, Measurement Input 0.06 0.07
Corporate obligations | Measurement Input, Loss Severity | Recurring | Maximum | Valuation Technique, Discounted Cash Flow | Level 3    
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]    
Debt Securities, Available-for-sale, Measurement Input 0.20 0.20
Corporate obligations | Measurement Input, Loss Severity | Recurring | Minimum | Valuation Technique, Discounted Cash Flow | Level 3    
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]    
Debt Securities, Available-for-sale, Measurement Input 0.20 0.20
Corporate obligations | Measurement Input, Loss Severity | Recurring | Weighted Average | Valuation Technique, Discounted Cash Flow | Level 3    
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]    
Debt Securities, Available-for-sale, Measurement Input 0.20 0.20