Quarterly report pursuant to Section 13 or 15(d)

Commitments and Contingencies - Additional Information (Details)

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Commitments and Contingencies - Additional Information (Details) (USD $)
3 Months Ended 3 Months Ended 12 Months Ended 0 Months Ended 3 Months Ended 48 Months Ended 3 Months Ended 0 Months Ended 3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Dec. 31, 2013
Mar. 31, 2014
US Government and Government Agencies and Authorities [Member]
Dec. 31, 2013
Credit Card Cancellation and Identity Theft Consumers [Member]
Mar. 25, 2014
New York Attorney General (NYAG) [Member]
Mar. 31, 2014
522110 Commercial Banking [Member]
Dec. 31, 2013
522110 Commercial Banking [Member]
Mar. 31, 2014
S P Es [Member]
Dec. 31, 2013
S P Es [Member]
Mar. 31, 2014
FGIC Settlement [Member]
trust
Mar. 31, 2014
Federal Housing Finance Agency (FHFA) [Member]
Dec. 31, 2008
Federal Housing Finance Agency (FHFA) [Member]
Mar. 31, 2014
Financial Guarantee [Member]
Guarantee Life Insurance Book Value Protection Derivative [Member]
Dec. 31, 2013
Financial Guarantee [Member]
Guarantee Life Insurance Book Value Protection Derivative [Member]
Mar. 31, 2014
Financial Guarantee [Member]
Guarantee Life Insurance Book Value Protection Derivative [Member]
Maximum [Member]
Dec. 31, 2013
Financial Guarantee [Member]
Guarantee Life Insurance Book Value Protection Derivative [Member]
Maximum [Member]
Mar. 31, 2014
Financial Guarantee [Member]
Guarantee Employee Retirement Protection Derivative [Member]
Dec. 31, 2013
Financial Guarantee [Member]
Guarantee Employee Retirement Protection Derivative [Member]
Mar. 31, 2014
Payment Guarantee [Member]
Dec. 31, 2013
Payment Guarantee [Member]
Mar. 31, 2014
FGIC Settlement [Member]
Mar. 31, 2014
Residential Mortgage Backed Securities [Member]
Apr. 07, 2014
FGIC Settlement [Member]
Mar. 31, 2014
FGIC Settlement [Member]
Apr. 07, 2014
Subsequent Event [Member]
FGIC Settlement [Member]
Second Mortgage [Member]
trust
Guarantor Obligations [Line Items]                                                    
Unfunded equity investment commitments $ 133,000,000   $ 195,000,000                                              
Commitment to purchase equity securities 1,400,000,000   1,400,000,000                                              
Commitment to purchase residential mortgage and commercial real estate loans 2,800,000,000   1,500,000,000                                              
Purchase Commitment, Remaining Minimum Amount Committed                                             3,200,000,000      
Forward Dated Resale and Securities Borrowing Agreements Commitment 93,500,000,000   75,500,000,000                                              
Forward Dated Repurchase And Securities Lending Agreements Commitment 56,500,000,000   38,300,000,000                                              
Operating Leases, Future Minimum Payments Due [Abstract]                                                    
2014 2,200,000,000                                                  
2015 2,500,000,000                                                  
2016 2,200,000,000                                                  
2017 1,700,000,000                                                  
2018 1,300,000,000                                                  
Thereafter 5,700,000,000                                                  
Notional Amount of Derivatives 1,348,481,000,000   1,328,787,000,000       1,700,000,000 1,800,000,000 1,300,000,000 1,300,000,000       13,400,000,000 13,400,000,000 3,100,000,000 3,000,000,000 3,300,000,000 4,600,000,000              
Life Insurance Book Value Protection, Fair Value Liability 35,000,000   39,000,000                                              
Merchant Services Transactions Processed And Settled By Sponsored Entitites 149,400,000,000 148,300,000,000                                                
Losses As Result Of Cardholder Disputed Transactions (4,000,000) (4,000,000)                                                
Noncontrolling Interest, Ownership Percentage by Parent 49.00%                                                  
Merchant escrow deposits held as collateral 114,000,000   203,000,000                                              
Guarantor Obligations, Maximum Exposure, Undiscounted 251,700,000,000   258,500,000,000                                              
Registration Payment Arrangement, Maximum Potential Consideration                                       6,800,000,000 6,900,000,000          
Loss Contingency Accrual, at Carrying Value 413,000,000   381,000,000                                              
Payment Protection Insurance Claims Expense 141,000,000 0                                                
Litigation Settlement, Expense 6,000,000,000 2,200,000,000                   3,600,000,000                            
Loss Contingency, Loss in Period                       103,000,000                            
Loss Contingency, Range of Possible Loss, Minimum 0                                                  
Loss Contingency, Range of Possible Loss, Maximum 5,000,000,000                                                  
Number Of Trusts Involved In Settlement Agreement                                                   7
Loss Contingency, Pending Claims, Number                     2                              
Payments for Legal Settlements       45,000,000 738,000,000           900,000,000                           900,000,000  
Litigation Settlement, Amount           15,000,000                                        
Additional litigation payment subject to settlement completion [Line Items]                                           50,000,000   50,000,000    
Litigation Settlement to be Paid in Cash                       9,500,000,000                            
Proceeds from Legal Settlements                       3,200,000,000                            
FHFA Settlement, net cost 6,300,000,000                                                  
FHFA Settlement, charge 3,700,000,000                                                  
Loss Contingency, MBS Offerings, Securities Issued                         $ 57,500,000,000