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