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Representations and Warranties Obligations and Corporate Guarantees (Details) (USD $)
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12 Months Ended | 4 Months Ended | 8 Months Ended | 12 Months Ended | 60 Months Ended | 0 Months Ended | 12 Months Ended | 12 Months Ended | 12 Months Ended | 0 Months Ended | 12 Months Ended | 1 Months Ended | ||||||||||||||||||||||||||||||||||
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Dec. 31, 2012
payment
RescissionNotices
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Dec. 31, 2011
RescissionNotices
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Dec. 31, 2012
Minimum [Member]
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Dec. 31, 2012
Maximum [Member]
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Dec. 31, 2012
Federal National Mortgage Association FNMA [Member]
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Dec. 31, 2011
Bank Of New York Mellon As Trustee [Member]
Group
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Aug. 31, 2011
Bank Of New York Mellon As Trustee [Member]
Group
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Dec. 31, 2012
Bank Of New York Mellon As Trustee [Member]
Investor
trust
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Dec. 31, 2008
Bank Of New York Mellon As Trustee [Member]
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Jun. 28, 2011
Bank Of New York Mellon As Trustee [Member]
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Apr. 14, 2011
Assured Guaranty [Member]
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Dec. 31, 2012
Assured Guaranty [Member]
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Dec. 31, 2011
Assured Guaranty [Member]
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Dec. 31, 2012
Government sponsored enterprise obligations [Member]
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Dec. 31, 2010
Government sponsored enterprise obligations [Member]
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Dec. 31, 2012
Other Non Government Sponsored Entites [Member]
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Dec. 31, 2012
Monoline [Member]
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Dec. 31, 2011
Monoline [Member]
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Dec. 31, 2011
Pending Litigation [Member]
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Dec. 31, 2011
Government sponsored enterprise obligations [Member]
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Dec. 31, 2012
Indemnification Agreement [Member]
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Dec. 31, 2011
Indemnification Agreement [Member]
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Dec. 31, 2012
Unpaid Principal Balance Of Loan Guarantees Satisfied [Member]
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Dec. 31, 2011
Unpaid Principal Balance Of Loan Guarantees Satisfied [Member]
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Jun. 28, 2011
Second Mortgage [Member]
Bank Of New York Mellon As Trustee [Member]
trust
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Apr. 14, 2011
Second Mortgage [Member]
Assured Guaranty [Member]
trust
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Jun. 28, 2011
First Mortgage [Member]
Bank Of New York Mellon As Trustee [Member]
trust
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Apr. 14, 2011
First Mortgage [Member]
Assured Guaranty [Member]
trust
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Dec. 31, 2012
First Lien Mortgages Serviced for Others [Member]
RescissionNotices
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Dec. 31, 2012
Loans held for investment [Member]
RescissionNotices
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Dec. 31, 2012
Resolved Through Acceptance [Member]
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Dec. 31, 2012
Resolved Through Reinstatement of Coverage or Payment of Claim [Member]
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Dec. 31, 2012
Resolved Through Settlement, Policy Commutation or Similar Arrangement [Member]
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Dec. 31, 2012
Implicated by Ongoing Litigation [Member]
RescissionNotices
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Dec. 31, 2012
In Process of Review [Member]
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Dec. 31, 2012
Reviewed and Being Contested [Member]
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Dec. 31, 2012
Subject of Ongoing Litigation [Member]
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Dec. 31, 2012
Federal National Mortgage Association FNMA [Member]
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Jan. 06, 2013
Federal National Mortgage Association FNMA [Member]
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Dec. 31, 2012
Federal National Mortgage Association FNMA [Member]
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Dec. 31, 2012
Federal National Mortgage Association FNMA [Member]
First Lien Mortgages Serviced for Others [Member]
RescissionNotices
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Jul. 17, 2012
Syncora Holdings Ltd [Member]
second_lien_trust
trust
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Dec. 31, 2012
Federal National Mortgage Association FNMA [Member]
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Dec. 31, 2012
Subject of Ongoing Litigation [Member]
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Jan. 31, 2013
Subsequent Event [Member]
Federal National Mortgage Association FNMA [Member]
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Jan. 06, 2013
Subsequent Event [Member]
Federal National Mortgage Association FNMA [Member]
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| Guarantor Obligations [Line Items] | ||||||||||||||||||||||||||||||||||||||||||||||
| Period of Defaulted Loans Leading to an Increase in Claims | 18 months | |||||||||||||||||||||||||||||||||||||||||||||
| Repurchase Claims, Trend of Number of Payments Made By Borrower, Defaulted Loans | 25 | |||||||||||||||||||||||||||||||||||||||||||||
| Number of First Lien R M B S Trusts with Outstanding or Potential Repurchase Claims | 8 | |||||||||||||||||||||||||||||||||||||||||||||
| Number of Second Lien RMBS Trusts with Outstanding or Potential Repurchase Claims | 6 | |||||||||||||||||||||||||||||||||||||||||||||
| Original Principal Balance of First Lien Mortgages Included in Settlement Agreement | $ 9,600,000,000 | |||||||||||||||||||||||||||||||||||||||||||||
| Original Principal Balance of Second Lien Mortgages Included in Settlement Agreement | 7,700,000,000 | |||||||||||||||||||||||||||||||||||||||||||||
| Litigation Settlement to be Paid in Cash | 375,000,000 | |||||||||||||||||||||||||||||||||||||||||||||
| Percentage of loans underlying outstanding repurchase demands | 26.00% | 28.00% | ||||||||||||||||||||||||||||||||||||||||||||
| Number Of Trusts Involved In Settlement Agreement | 5 | 8 | 525 | 21 | ||||||||||||||||||||||||||||||||||||||||||
| Original Principal Balance Of Loans Originated | 424,000,000,000 | 35,800,000,000 | 1,400,000,000,000 | |||||||||||||||||||||||||||||||||||||||||||
| Outstanding Principal Balance of Residential Mortgage Loans Included in Settlement Agreement | 300,000,000,000 | |||||||||||||||||||||||||||||||||||||||||||||
| Unresolved Repurchase Claims Submitted for Alleged Breaches of Selling Representations and Warranties | 12,200,000,000 | |||||||||||||||||||||||||||||||||||||||||||||
| Original Principal Balance of Loans Originated During Period | 409,000,000,000 | |||||||||||||||||||||||||||||||||||||||||||||
| Principal Amount Outstanding On Loans Securitized In Default | 220,000,000,000 | |||||||||||||||||||||||||||||||||||||||||||||
| Principal Amount Outstanding On Loans Securitized In Default During Period | 217,000,000,000 | |||||||||||||||||||||||||||||||||||||||||||||
| Number Of Institutional Investors Involved In Settlement Agreement | 22 | |||||||||||||||||||||||||||||||||||||||||||||
| Outstanding Claims, From Mortgage Insurance Recission Notices | 2,300,000,000 | 1,200,000,000 | 1,900,000,000 | |||||||||||||||||||||||||||||||||||||||||||
| Settlement Payment | 8,500,000,000 | 1,100,000,000 | ||||||||||||||||||||||||||||||||||||||||||||
| Estimated Litigation Liability | 100,000,000 | |||||||||||||||||||||||||||||||||||||||||||||
| Private Placements From Which Plaintiffs Purchased Mortgage Backed Securities Issued By Country Wide Financial Corporation Related Entities | 6 | |||||||||||||||||||||||||||||||||||||||||||||
| Number of Groups With Opportunity to Dispute Legal Settlement | 44 | |||||||||||||||||||||||||||||||||||||||||||||
| Number of Groups With Opportunity to Dispute Legal Settlement, Who Have Withdrawn From Proceedings | 7 | |||||||||||||||||||||||||||||||||||||||||||||
| Number of Motions Denied | 1 | |||||||||||||||||||||||||||||||||||||||||||||
| Principal Amount Outstanding on Loans Securitized or Asset-backed Financing Arrangement | 20,200,000,000 | |||||||||||||||||||||||||||||||||||||||||||||
| Loan Loss Insurance Value Of Reinsurance Arrangement | 470,000,000 | |||||||||||||||||||||||||||||||||||||||||||||
| Loss Contingency Accrual, at Carrying Value | 510,000,000 | 476,000,000 | ||||||||||||||||||||||||||||||||||||||||||||
| Loans and Leases Receivable, Gross, Consumer, Lease Financing | 900,000,000 | 2,200,000,000 | ||||||||||||||||||||||||||||||||||||||||||||
| Agreement Reached To Resolve Repurchase Claims For Residential Mortgage Loans Sold To Gses Related To Legacy Subsidiary Entities | 2,800,000,000 | |||||||||||||||||||||||||||||||||||||||||||||
| Loss On Repurchase Or Reimbursement Of Repurchase Claims For First Lien Mortgages And Home Equity Loans From The Investor Or Securitization Trust | 1,600,000,000 | 1,700,000,000 | ||||||||||||||||||||||||||||||||||||||||||||
| New Purchase Claims | 22,400,000,000 | 10,300,000,000 | 2,300,000,000 | 1,500,000,000 | 295,000,000 | |||||||||||||||||||||||||||||||||||||||||
| Amount of Loan Repurchase Claims Resolved | 6,600,000,000 | |||||||||||||||||||||||||||||||||||||||||||||
| Amount of Loan Repurchase Claims Resolved Through Rescission | 4,600,000,000 | |||||||||||||||||||||||||||||||||||||||||||||
| Amount of Loan Repurchase Claims Resolved Through Repurchase and Make Whole Payments | 2,000,000,000 | |||||||||||||||||||||||||||||||||||||||||||||
| Number of Open Mortgage Insurance Rescission Notices | 110,000 | 90,000 | 49,000 | 11,000 | 50,000 | 27,000 | ||||||||||||||||||||||||||||||||||||||||
| Percent of Mortgage Insurance Recission Notes Received Which Are Resolved | 32.00% | 20.00% | 58.00% | 22.00% | ||||||||||||||||||||||||||||||||||||||||||
| Percent of Mortgage Insurance Recission Notes Received Which Are Not Yet Resolved | 68.00% | 46.00% | 37.00% | 63.00% | 40.00% | |||||||||||||||||||||||||||||||||||||||||
| Cash Paid for Repurchases | 1,755,000,000 | 5,220,000,000 | ||||||||||||||||||||||||||||||||||||||||||||
| Unpaid Principal Balance | 2,075,000,000 | 6,169,000,000 | ||||||||||||||||||||||||||||||||||||||||||||
| Payments for Legal Settlements | 1,800,000,000 | 3,600,000,000 | ||||||||||||||||||||||||||||||||||||||||||||
| Residental Mortgage Loans Repurchased in Settlement | 6,600,000,000 | |||||||||||||||||||||||||||||||||||||||||||||
| Provision | 3,939,000,000 | 15,591,000,000 | (8,600,000,000) | 7,000,000,000 | 500,000,000 | 2,500,000,000 | ||||||||||||||||||||||||||||||||||||||||
| Representations Warranties And Guarantees Maximum Exposure Above Existing Accruals | 4,000,000,000 | 5,000,000,000 | ||||||||||||||||||||||||||||||||||||||||||||
| Percentage of the voting rights of outstanding securities required to investigate loans files and demand repurchase of loans | 25.00% | |||||||||||||||||||||||||||||||||||||||||||||
| Outstanding Claims For Representations And Warranties Unpaid Principal Balance | 12,200,000,000 | 2,400,000,000 | 3,100,000,000 | |||||||||||||||||||||||||||||||||||||||||||
| Unpaid principal balance of loans without repurchase requests | 5,300,000,000 | 4,000,000,000 | ||||||||||||||||||||||||||||||||||||||||||||
| Percentage of loans resolved through repurchase or make whole payments | 15.00% | |||||||||||||||||||||||||||||||||||||||||||||
| Private Label Securitization Trust Related Repurchase Claims | 44.00% | |||||||||||||||||||||||||||||||||||||||||||||
| Private Label Securitization Trust Related Repurchase Claims | $ 8,000,000,000 | |||||||||||||||||||||||||||||||||||||||||||||
| Timeframe To Resolve Repurchase Claims In Dispute | 90 days | 120 days | ||||||||||||||||||||||||||||||||||||||||||||
| Timetable to reach a settlement once a breach of representations and warranties is confirmed | 60 days | 90 days | ||||||||||||||||||||||||||||||||||||||||||||
| Inactive Claims, Threshold Period of Inactivity after Denial | 6 months | |||||||||||||||||||||||||||||||||||||||||||||