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Contingencies And Other Disclosures (Narrative I) (Details) shares in Millions | 1 Months Ended | 3 Months Ended | 9 Months Ended | 36 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
Oct. 31, 2014 USD ($) | Sep. 30, 2015 USD ($) number shares | Sep. 30, 2014 USD ($) | Sep. 30, 2015 USD ($) number shares | Sep. 30, 2014 USD ($) | Dec. 31, 2007 number | Sep. 25, 2015 USD ($) | Sep. 30, 2013 USD ($) | Mar. 31, 2008 shares
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |
Estimated Litigation Liability |  | $ 17,100,000 |  | $ 17,100,000 |  |  |  |  |
Number of GSEs to which conventional conforming single-family mortgage loans were predominately sold to | number |  | 2 |  | 2 |  |  |  |  |
Percent Of Repurchase Make Whole Claims Related To Private Whole Loan Sales |  |  |  | 47.00% |  |  |  |  |
Loan-to-value ratio at origination |  |  |  | 80.00% |  |  |  |  |
Accrued losses on loan repurchase exposure |  | $ 115,500,000 | $ 126,200,000 | $ 115,500,000 | $ 126,200,000 |  |  |  |
Unpaid principal balance of servicing portfolio |  | 214,800,000 |  | 214,800,000 |  |  |  | $ 15,000,000,000 |
Litigation and regulatory matters |  | 10,922,000 | 35,390,000 | 173,422,000 | (2,720,000) |  |  |  |
Fha Insured [Member] |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |
Amount Of Insurance Recoveries Company Is Pursuing |  | 75,000,000 |  | 75,000,000 |  |  |  |  |
Litigation Settlement Expense |  |  |  | 212,500,000 |  |  |  |  |
Mortgage Securitization Litigation [Member] |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |
Investment in proprietary securitizations subject to lawsuits |  |  |  | 145,700,000 |  |  |  |  |
Investment in proprietary securitizations subject to indemnifications |  |  |  | 613,900,000 |  |  |  |  |
F H Proprietary Securitization [Member] |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |
Number of securitization trusts active | number |  |  |  |  |  | 80 |  |  |
Remaining balance in mortgage loans |  | $ 5,200,000,000 |  | $ 5,200,000,000 |  |  |  |  |
Visa Class B Shares [Member] |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |
Number of Visa Class B shares | shares |  | 1.1 |  | 1.1 |  |  |  |  | 2.4
Additional amount deposited into escrow account by Visa |  |  | 450,000,000 |  | 450,000,000 |  |  |  |
Cash payment to counterparty | $ 2,400,000 |  |  |  |  |  |  |  |
Estimated conversion ratio |  | 165.00% |  | 165.00% |  |  |  |  |
Contingent liability |  | $ 800,000 |  | $ 800,000 |  |  |  |  |
Derivative liability |  | 4,800,000 | $ 7,600,000 | 4,800,000 | $ 7,600,000 |  |  |  |
Historical cost |  | 0 |  | 0 |  |  |  |  |
Amount disputed related to various items for transfers of subservicers |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |
Actual damages sought by plaintiff |  |  |  | 8,600,000 |  |  |  |  |
Subservicer expenditure reimbursement amount disputed |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |
Actual damages sought by plaintiff |  |  |  | 34,900,000 |  |  |  |  |
Arbitration Matter [Member] |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |
Litigation Settlement Expense |  |  |  | 11,600,000 |  |  |  |  |
Litigation and regulatory matters |  |  |  | 11,600,000 |  |  |  |  |
Alt-A [Member] | F H Proprietary Securitization [Member] |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |
Remaining balance in mortgage loans |  | 3,700,000,000 |  | 3,700,000,000 |  |  |  |  |
Jumbo Mortgage Loans [Member] | F H Proprietary Securitization [Member] |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |
Remaining balance in mortgage loans |  | 1,500,000,000 |  | 1,500,000,000 |  |  |  |  |
Minimum |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |
Estimated reasonably possible losses in excess of currently established liabilities |  | 0 |  | 0 |  |  |  |  |
Minimum | Debit Transaction Sequencing Matter [Member] |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |
Actual damages sought by plaintiff |  |  |  | 5,000,000 |  |  |  |  |
Maximum |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |
Estimated reasonably possible losses in excess of currently established liabilities |  | $ 70,000,000 |  | $ 70,000,000 |  |  |  |  |
Investments Subject To Lawsuits [Member] | Mortgage Securitization Litigation [Member] |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |
Ending certificate balance of the investments subject to lawsuits |  |  |  |  |  |  | $ 204,700,000 |  |
Investments percentage performing |  |  |  |  |  |  | 85.00% |  |
Cumulative losses on investments, percentage of unpaid balance |  |  |  |  |  |  | 7.00% |  |

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