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Representations and Warranties Obligations and Corporate Guarantees (Details) (USD $)
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3 Months Ended | 6 Months Ended | 3 Months Ended | 6 Months Ended | 3 Months Ended | 6 Months Ended | 3 Months Ended | 6 Months Ended | 3 Months Ended | |||||||||||||||||||||
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Jun. 30, 2012
RescissionNotices
Payment
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Jun. 30, 2011
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Jun. 30, 2012
RescissionNotices
Payment
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Jun. 30, 2011
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Dec. 31, 2011
RescissionNotices
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Jun. 30, 2012
Other Non Government Sponsored Entites [Member]
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Jun. 30, 2012
Monoline [Member]
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Jun. 30, 2012
Indemnification Agreement [Member]
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Jun. 30, 2011
Indemnification Agreement [Member]
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Jun. 30, 2012
Indemnification Agreement [Member]
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Jun. 30, 2011
Indemnification Agreement [Member]
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Jun. 30, 2012
Unpaid Principal Balance Of Loan Guarantees Satisfied [Member]
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Jun. 30, 2011
Unpaid Principal Balance Of Loan Guarantees Satisfied [Member]
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Jun. 30, 2012
Unpaid Principal Balance Of Loan Guarantees Satisfied [Member]
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Jun. 30, 2011
Unpaid Principal Balance Of Loan Guarantees Satisfied [Member]
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Jun. 30, 2012
Obligation to Repurchase Receivables Sold [Member]
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Jun. 30, 2011
Obligation to Repurchase Receivables Sold [Member]
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Jun. 30, 2012
Obligation to Repurchase Receivables Sold [Member]
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Jun. 30, 2011
Obligation to Repurchase Receivables Sold [Member]
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Jun. 30, 2012
Resolved Through Acceptance [Member]
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Jun. 30, 2012
Resolved Through Reinstatement of Coverage or Payment of Claim [Member]
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Jun. 30, 2012
Resolved Through Settlement, Policy Commutation or Similar Arrangement [Member]
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Jun. 30, 2012
Implicated by Ongoing Litigation [Member]
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Jun. 30, 2012
In Process of Review [Member]
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Jun. 30, 2012
Reviewed and Being Contested [Member]
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Jun. 30, 2012
Subject of Ongoing Litigation [Member]
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Jun. 30, 2012
Minimum [Member]
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Jun. 30, 2012
Maximum [Member]
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Jun. 28, 2011
First Mortgage [Member]
Bank Of New York Mellon As Trustee [Member]
Trust
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Jun. 28, 2011
Second Mortgage [Member]
Bank Of New York Mellon As Trustee [Member]
Trust
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| Guarantor Obligations [Line Items] | ||||||||||||||||||||||||||||||
| Number of Payments Made By Borrower | 25 | 25 | ||||||||||||||||||||||||||||
| Percentage of loans underlying outstanding repurchase demands | 27.00% | 27.00% | 28.00% | |||||||||||||||||||||||||||
| Number Of Trusts Involved In Settlement Agreement | 525 | 5 | ||||||||||||||||||||||||||||
| Number of Open Mortgage Insurance Rescission Notices | 106,000 | 106,000 | 90,000 | |||||||||||||||||||||||||||
| Percent of Mortgage Insurance Recission Notes Received Which Are Resolved | 28.00% | 28.00% | 21.00% | 51.00% | 28.00% | |||||||||||||||||||||||||
| Percent of Mortgage Insurance Recission Notes Received Which Are Not Yet Resolved | 72.00% | 72.00% | 44.00% | 37.00% | 63.00% | 23.00% | ||||||||||||||||||||||||
| Cash Paid for Repurchases | $ 591,000,000 | $ 1,560,000,000 | $ 1,014,000,000 | $ 2,137,000,000 | ||||||||||||||||||||||||||
| Unpaid Principal Balance | 723,000,000 | 1,866,000,000 | 1,255,000,000 | 2,589,000,000 | ||||||||||||||||||||||||||
| Loss | 145,000,000 | 1,006,000,000 | 409,000,000 | 1,352,000,000 | ||||||||||||||||||||||||||
| Provision | 395,000,000 | 14,037,000,000 | 677,000,000 | 15,050,000,000 | ||||||||||||||||||||||||||
| Representations Warranties And Guarantees Maximum Exposure Above Existing Accruals | 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 | 8,300,000,000 | 3,100,000,000 | ||||||||||||||||||||||||||||
| Unpaid principal balance of loans without repurchase requests | 7,100,000,000 | |||||||||||||||||||||||||||||
| Principal Balance of Loans Without Repurchase Requests Settled Through Litigation Subsequent to Period End | 1,800,000,000 | 1,800,000,000 | ||||||||||||||||||||||||||||
| Percentage of loans resolved through repurchase or make whole payments | 25.00% | |||||||||||||||||||||||||||||
| Private Label Securitization Trust Related Repurchase Claims | 51.00% | |||||||||||||||||||||||||||||
| Private Label Securitization Trust Related Repurchase Claims | $ 3,700,000,000 | $ 5,300,000,000 | ||||||||||||||||||||||||||||
| 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 | ||||||||||||||||||||||||||||