Contingencies And Other Disclosures (Narrative I) (Details) shares in Millions	1 Months Ended	6 Months Ended	36 Months Ended
	Oct. 31, 2014 USD ($)	Jun. 30, 2015 USD ($) number shares	Dec. 31, 2007 number	Jun. 25, 2015 USD ($)	Sep. 30, 2014 USD ($)	Jun. 30, 2014 USD ($)	Sep. 30, 2013 USD ($)	Mar. 31, 2008 shares
Loss Contingencies [Line Items]
Estimated Litigation Liability		$ 6,300,000
Number of GSEs to which conventional conforming single-family mortgage loans were predominately sold to | number		2
Percent Of Repurchase Make Whole Claims Related To Private Whole Loan Sales		51.00%
Loan-to-value ratio at origination		80.00%
Accrued losses on loan repurchase exposure		$ 117,200,000				$ 141,600,000
Unpaid principal balance of servicing portfolio		228,500,000					$ 15,000,000,000
Fha Insured [Member]
Loss Contingencies [Line Items]
Amount Of Insurance Recoveries Company Is Pursuing		75,000,000
Litigation Settlement Expense		212,500,000
Mortgage Securitization Litigation [Member]
Loss Contingencies [Line Items]
Investment in proprietary securitizations subject to lawsuits		195,700,000
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		$ 5,500,000,000
Visa Class B Shares [Member]
Loss Contingencies [Line Items]
Number of Visa Class B shares | shares		1.1						2.4
Additional amount deposited into escrow account by Visa					$ 450,000,000
Cash payment to counterparty	$ 2,400,000
Estimated conversion ratio		165.00%
Contingent liability		$ 800,000
Derivative liability		4,800,000				$ 4,700,000
Historical cost		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
Alt-A [Member] | F H Proprietary Securitization [Member]
Loss Contingencies [Line Items]
Remaining balance in mortgage loans		3,900,000,000
Jumbo Mortgage Loans [Member] | F H Proprietary Securitization [Member]
Loss Contingencies [Line Items]
Remaining balance in mortgage loans		1,700,000,000
Minimum
Loss Contingencies [Line Items]
Estimated reasonably possible losses in excess of currently established liabilities		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		$ 75,000,000
Investments Subject To Lawsuits [Member] | Mortgage Securitization Litigation [Member]
Loss Contingencies [Line Items]
Ending certificate balance of the investments subject to lawsuits				$ 229,100,000
Investments percentage performing				85.00%
Cumulative losses on investments, percentage of unpaid balance				7.00%