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Representations and Warranties Obligations and Corporate Guarantees (Details) (USD $)
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3 Months Ended | 6 Months Ended | 6 Months Ended | 0 Months Ended | 12 Months Ended | 6 Months Ended | 3 Months Ended | 6 Months Ended | 3 Months Ended | 6 Months Ended | ||||||||||||||||||||||||||||||
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Jun. 30, 2014
RescissionNotices
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Jun. 30, 2013
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Jun. 30, 2014
RescissionNotices
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Jun. 30, 2013
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Jun. 28, 2014
lawsuit
trust
trustee
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Dec. 31, 2013
RescissionNotices
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Jun. 30, 2014
First-Lien Mortgages Serviced for Others [Member]
RescissionNotices
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Jun. 30, 2014
Loans Held-for-Investment [Member]
RescissionNotices
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Jun. 30, 2014
Implicated by Ongoing Litigation [Member]
RescissionNotices
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Jun. 30, 2014
Resolved Through Acceptance [Member]
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Jun. 30, 2014
Resolved Through Reinstatement of Coverage or Payment of Claim [Member]
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Jun. 30, 2014
Resolved Through Settlement, Policy Commutation or Similar Arrangement [Member]
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Jun. 30, 2014
In Process of Review [Member]
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Jun. 30, 2014
Reviewed and Being Contested [Member]
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Jun. 30, 2014
Subject of Ongoing Litigation [Member]
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Jun. 30, 2014
Minimum [Member]
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Jun. 30, 2014
FGIC Settlement [Member]
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Mar. 31, 2014
FGIC Settlement [Member]
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Mar. 25, 2014
Federal Housing Finance Agency (FHFA) [Member]
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Jun. 30, 2014
Federal Housing Finance Agency (FHFA) [Member]
First-Lien Mortgages Serviced for Others [Member]
RescissionNotices
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Dec. 31, 2013
Federal National Mortgage Association FNMA [Member]
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Jun. 30, 2014
Whole-loan investors, private-label securitization trustees, third-party securitization sponsors and other [Member]
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Dec. 31, 2013
Whole-loan investors, private-label securitization trustees, third-party securitization sponsors and other [Member]
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Jun. 30, 2014
Indemnification Agreement [Member]
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Jun. 30, 2013
Indemnification Agreement [Member]
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Jun. 30, 2014
Indemnification Agreement [Member]
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Jun. 30, 2013
Indemnification Agreement [Member]
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Jun. 30, 2014
Obligation to Repurchase Receivables Sold [Member]
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Jun. 30, 2013
Obligation to Repurchase Receivables Sold [Member]
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Jun. 30, 2014
Obligation to Repurchase Receivables Sold [Member]
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Jun. 30, 2013
Obligation to Repurchase Receivables Sold [Member]
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Jul. 15, 2014
Subsequent Event [Member]
BAC vs. United Guaranty Entities [Member]
rescission_notice
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| Guarantor Obligations [Line Items] | ||||||||||||||||||||||||||||||||||||||||
| Representations and warranties claims or lawsuits in response to statue of limitations rulings | 6 | |||||||||||||||||||||||||||||||||||||||
| Trustees involved in representations and warranties claims or lawsuits in response to statue of limitations rulings | 6 | |||||||||||||||||||||||||||||||||||||||
| RMBS trusts covered in representations and warranties claims or lawsuits in response to statue of limitations rulings | 2,200 | |||||||||||||||||||||||||||||||||||||||
| Amount of repurchase demands not included in unresolved repurchase claims | $ 1,200,000,000 | $ 1,200,000,000 | $ 1,200,000,000 | |||||||||||||||||||||||||||||||||||||
| Percentage of loans resolved through repurchase or make whole payments | 16.00% | |||||||||||||||||||||||||||||||||||||||
| Percentage of loans resolved through rescission or payment in full by borrower | 47.00% | |||||||||||||||||||||||||||||||||||||||
| Timetable to reach a settlement once a breach of representations and warranties is confirmed | 60 days | |||||||||||||||||||||||||||||||||||||||
| Inactive Claims, Threshold Period of Inactivity after Denial | 6 months | |||||||||||||||||||||||||||||||||||||||
| Notional amount of unresolved repurchase claims | 20,500,000,000 | |||||||||||||||||||||||||||||||||||||||
| Outstanding Claims By Counterparty | 20,551,000,000 | [1],[2],[3] | 17,953,000,000 | [1],[2],[3] | ||||||||||||||||||||||||||||||||||||
| Outstanding monoline repurchase claims resolved | 450,000,000 | |||||||||||||||||||||||||||||||||||||||
| Number of Open Mortgage Insurance Rescission Notices | 91,000 | 91,000 | 101,000 | 30,000 | 8,000 | 53,000 | 20,000 | |||||||||||||||||||||||||||||||||
| Percent of Mortgage Insurance Recission Notes Received Which Are Resolved | 49.00% | 49.00% | 12.00% | 52.00% | 36.00% | |||||||||||||||||||||||||||||||||||
| Percent of Mortgage Insurance Recission Notes Received Which Are Not Yet Resolved | 51.00% | 51.00% | 58.00% | 5.00% | 95.00% | 29.00% | ||||||||||||||||||||||||||||||||||
| Litigation Settlement, Number of Rescission Notices Resolved | 14,000 | |||||||||||||||||||||||||||||||||||||||
| Representations Warranties And Guarantees Maximum Exposure Above Existing Accruals | 4,000,000,000.0 | |||||||||||||||||||||||||||||||||||||||
| Payments For Loan Guarantees | 146,000,000 | 250,000,000 | 236,000,000 | 758,000,000 | ||||||||||||||||||||||||||||||||||||
| Unpaid Principal Balance Of Loan Guarantees | 203,000,000 | 284,000,000 | 361,000,000 | 848,000,000 | ||||||||||||||||||||||||||||||||||||
| Loss On Loan Guarantees | 103,000,000 | 171,000,000 | 154,000,000 | 298,000,000 | ||||||||||||||||||||||||||||||||||||
| Payments for Legal Settlements | 950,000,000 | 9,500,000,000 | 3,600,000,000 | |||||||||||||||||||||||||||||||||||||
| Residential mortgage-backed securities received, fair value | 3,200,000,000 | |||||||||||||||||||||||||||||||||||||||
| FHFA Settlement, net cost | $ 6,300,000,000 | |||||||||||||||||||||||||||||||||||||||
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