Annual report pursuant to Section 13 and 15(d)

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

v3.22.0.1
FAIR VALUES OF ASSETS AND LIABILITIES - Significant Unobservable Level 3 Inputs (Details)
$ in Millions
Dec. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]    
Derivative assets gross $ 1,065 $ 1,946
Recurring    
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]    
MSRs 351 210
Recurring | Level 3    
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]    
MSRs 351 210
Derivative assets gross $ 10 $ 43
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 0.23 0.24
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 0.08 0.08
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 0.12 0.17
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 0.11 0.11
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 0.03 0.04
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 0.05
Derivative Assets | Measurement Input, Net Market Price | Recurring | Maximum | Valuation Technique, Consensus Pricing Model | Level 3    
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]    
Derivative Asset, Measurement Input 0.08 0.11
Derivative Assets | Measurement Input, Net Market Price | Recurring | Minimum | Valuation Technique, Consensus Pricing Model | Level 3    
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]    
Derivative Asset, Measurement Input (0.04) (0.04)
Loans held for investment, Measurement Input 0.01  
Derivative Assets | Measurement Input, Net Market Price | Recurring | Weighted Average | Valuation Technique, Consensus Pricing Model | Level 3    
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]    
Derivative Asset, Measurement Input   0.03
Derivative Assets | Measurement Input, Estimated Pull Thru | Recurring | Maximum | Valuation Technique, Consensus Pricing Model | Level 3    
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]    
Derivative Asset, Measurement Input 1 1
Derivative Assets | Measurement Input, Estimated Pull Thru | Recurring | Minimum | Consensus Pricing | Level 3    
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]    
Loans held for investment, Measurement Input 0.92  
Derivative Assets | Measurement Input, Estimated Pull Thru | Recurring | Minimum | Valuation Technique, Consensus Pricing Model | Level 3    
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]    
Derivative Asset, Measurement Input 0.06 0.01
Derivative Assets | Measurement Input, Estimated Pull Thru | Recurring | Weighted Average | Valuation Technique, Consensus Pricing Model | Level 3    
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]    
Derivative Asset, Measurement Input   0.88
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 0.02 0.01
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 0
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 0.01 0.01
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 0.39
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 0.05 0.04
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 0.80 0.80
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 0.05 0.05
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 0.23 0.25