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Loss Contingencies Arising From Representations And Warranties of Our Discontinued Mortgage Operations Loss Contingencies Arising From Representations and Warranties of Our Discontinued Mortgage Operations (Narrative) (Details) (USD $) | 12 Months Ended | 35 Months Ended | 36 Months Ended | 72 Months Ended | 12 Months Ended |  | 12 Months Ended
--- | --- | --- | --- | --- | --- | --- | ---
Apr. 30, 2014 | Nov. 30, 2007 | Apr. 30, 2007 | Apr. 30, 2014 | Apr. 30, 2014 SCC [Member] | Apr. 30, 2013 SCC [Member] | Apr. 30, 2012 SCC [Member] | Apr. 30, 2011 SCC [Member] | Apr. 30, 2014 Leasehold Improvements [Member]
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |
Securitization Transactions |  | 38 |  |  |  |  |  |  |
Percentage of fraud on originated loans |  |  | 68.00% |  |  |  |  |  |
Claims received for loans |  |  |  | $ 2,100,000,000 | $ 70,300,000 | $ 190,000,000 | $ 1,100,000,000 |  |
Incremental provision |  |  |  |  | 25,000,000 | 40,000,000 | 20,000,000 |  |
Increase In Losses Due To Assumed One Percent Increase In Validity Rates And Loss Severities | 16,000,000 |  |  |  |  |  |  |  |
Estimated useful life |  |  |  |  |  |  |  |  | 8 years
Loss Contingency Accrual, at Carrying Value |  |  |  |  | 183,765,000 | 158,765,000 | 130,018,000 | 126,260,000 |
Principal Assets of SCC | $ 520,000,000 |  |  | $ 520,000,000 |  |  |  |  |

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