Annual report pursuant to Section 13 and 15(d)

Commitments and Contingencies - Other Commitments (Details)

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Commitments and Contingencies - Other Commitments (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Liquefied Natural Gas Commodities    
Loss Contingencies [Line Items]    
Other commitments $ 582 $ 830
Resale and Forward-Dated Resale and Securities Borrowing Agreements    
Loss Contingencies [Line Items]    
Other commitments 66,500 97,200
Forward-Dated Repurchase and Securities Lending Agreements    
Loss Contingencies [Line Items]    
Other commitments 32,100 24,900
Auto Loans and Leases    
Loss Contingencies [Line Items]    
Other commitment, due in next twelve months $ 3,900 3,300
Other commitment, termination prior notice period 12 months  
Residential and Commercial Portfolio Segments | Residential and Commercial Financing Receivable | Loan Purchase Commitments    
Loss Contingencies [Line Items]    
Other commitments $ 93 86
Commercial | Loan Purchase Commitments    
Loss Contingencies [Line Items]    
Other commitments $ 645 $ 1,100