Quarterly report pursuant to Section 13 or 15(d)

Securitizations and Other Variable Interest Entities - Other Variable Interest Entities, Additional Information (Details)

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Securitizations and Other Variable Interest Entities - Other Variable Interest Entities, Additional Information (Details) - USD ($)
 3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Dec. 31, 2017
Variable Interest Entity [Line Items]      
Total assets $ 2,328,478,000,000 $ 2,247,794,000,000 $ 2,281,234,000,000
Consolidated VIEs      
Variable Interest Entity [Line Items]      
Total assets 52,083,000,000   56,155,000,000
Customer Vehicles      
Variable Interest Entity [Line Items]      
Maximum loss exposure 2,300,000,000   2,300,000,000
Liquidity commitments to unconsolidated securitization trusts 225,000,000   442,000,000
Collateralized Debt Obligations      
Variable Interest Entity [Line Items]      
Maximum loss exposure 390,000,000   358,000,000
Investment Vehicles      
Variable Interest Entity [Line Items]      
Maximum loss exposure 6,800,000,000   5,700,000,000
Investment Vehicles | Consolidated VIEs      
Variable Interest Entity [Line Items]      
Total assets 287,000,000   249,000,000
Investment Vehicles | Unconsolidated VIEs      
Variable Interest Entity [Line Items]      
Total assets 22,900,000,000   20,300,000,000
Leveraged Lease Trusts | Consolidated VIEs      
Variable Interest Entity [Line Items]      
Total assets 2,000,000,000   2,000,000,000
Tax Credit Vehicles      
Investments in Affordable Housing Projects [Abstract]      
Unfunded commitments $ 3,200,000,000   3,100,000,000
Unfunded commitment payment period 5 years    
Tax credits and other benefits $ 248,000,000 251,000,000  
Expected tax benefits recognized, as a percentage 25.00%    
Tax Credit Vehicles | Other income      
Investments in Affordable Housing Projects [Abstract]      
Pretax losses $ 208,000,000 $ 196,000,000  
Tax Credit Vehicles | Other assets      
Investments in Affordable Housing Projects [Abstract]      
Investments in affordable housing project investments 8,100,000,000   8,000,000,000
Tax Credit Vehicles | Unconsolidated VIEs      
Variable Interest Entity [Line Items]      
Maximum loss exposure $ 13,900,000,000   $ 13,800,000,000