v3.22.0.1
Commitments, Contingencies and Guarantees - Commitments (Detail) - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Commitment Liabilities [Line Items]    
Total lending $ 211,552 $ 171,575
Risk participations 10,016 8,054
Collateralized agreement 101,031 55,278
Collateralized financing 29,561 35,402
Investment 11,381 6,456
Other 9,143 8,203
Total commitments 372,684 284,968
Maturities, Year 1 [Member]    
Commitment Liabilities [Line Items]    
Total lending 61,964  
Risk participations 1,598  
Collateralized agreement 99,455  
Collateralized financing 29,561  
Investment 6,130  
Other 8,801  
Total commitments 207,509  
Maturities, Year 2 and Year 3 [Member]    
Commitment Liabilities [Line Items]    
Total lending 59,705  
Risk participations 6,340  
Collateralized agreement 1,576  
Collateralized financing 0  
Investment 1,965  
Other 297  
Total commitments 69,883  
Maturities, Year 3 and Year 4 [Member]    
Commitment Liabilities [Line Items]    
Total lending 74,956  
Risk participations 1,880  
Collateralized agreement 0  
Collateralized financing 0  
Investment 1,082  
Other 0  
Total commitments 77,918  
Maturities, Year 5 and Thereafter [Member]    
Commitment Liabilities [Line Items]    
Total lending 14,927  
Risk participations 198  
Collateralized agreement 0  
Collateralized financing 0  
Investment 2,204  
Other 45  
Total commitments 17,374  
Investment Grade Commercial Lending [Member]    
Commitment Liabilities [Line Items]    
Total lending 95,585 83,801
Investment Grade Commercial Lending [Member] | Maturities, Year 1 [Member]    
Commitment Liabilities [Line Items]    
Total lending 19,095  
Investment Grade Commercial Lending [Member] | Maturities, Year 2 and Year 3 [Member]    
Commitment Liabilities [Line Items]    
Total lending 29,347  
Investment Grade Commercial Lending [Member] | Maturities, Year 3 and Year 4 [Member]    
Commitment Liabilities [Line Items]    
Total lending 46,021  
Investment Grade Commercial Lending [Member] | Maturities, Year 5 and Thereafter [Member]    
Commitment Liabilities [Line Items]    
Total lending 1,122  
Non Investment Grade Commercial Lending [Member]    
Commitment Liabilities [Line Items]    
Total lending 69,644 56,757
Non Investment Grade Commercial Lending [Member] | Maturities, Year 1 [Member]    
Commitment Liabilities [Line Items]    
Total lending 5,353  
Non Investment Grade Commercial Lending [Member] | Maturities, Year 2 and Year 3 [Member]    
Commitment Liabilities [Line Items]    
Total lending 24,008  
Non Investment Grade Commercial Lending [Member] | Maturities, Year 3 and Year 4 [Member]    
Commitment Liabilities [Line Items]    
Total lending 26,878  
Non Investment Grade Commercial Lending [Member] | Maturities, Year 5 and Thereafter [Member]    
Commitment Liabilities [Line Items]    
Total lending 13,405  
Warehouse Financing [Member]    
Commitment Liabilities [Line Items]    
Total lending 10,391 9,377
Warehouse Financing [Member] | Maturities, Year 1 [Member]    
Commitment Liabilities [Line Items]    
Total lending 1,584  
Warehouse Financing [Member] | Maturities, Year 2 and Year 3 [Member]    
Commitment Liabilities [Line Items]    
Total lending 6,350  
Warehouse Financing [Member] | Maturities, Year 3 and Year 4 [Member]    
Commitment Liabilities [Line Items]    
Total lending 2,057  
Warehouse Financing [Member] | Maturities, Year 5 and Thereafter [Member]    
Commitment Liabilities [Line Items]    
Total lending 400  
Credit cards [Member]    
Commitment Liabilities [Line Items]    
Total lending 35,932 $ 21,640
Credit cards [Member] | Maturities, Year 1 [Member]    
Commitment Liabilities [Line Items]    
Total lending 35,932  
Credit cards [Member] | Maturities, Year 2 and Year 3 [Member]    
Commitment Liabilities [Line Items]    
Total lending 0  
Credit cards [Member] | Maturities, Year 3 and Year 4 [Member]    
Commitment Liabilities [Line Items]    
Total lending 0  
Credit cards [Member] | Maturities, Year 5 and Thereafter [Member]    
Commitment Liabilities [Line Items]    
Total lending $ 0