Loans Receivable, Net Loans Receivable, Net (Details - Modifications Delinquency) - USD ($) $ in Millions	Mar. 31, 2016	Dec. 31, 2015
Financing Receivable, Modifications [Line Items]
Financing Receivable, Troubled Debt Restructuring, Modification, Recorded Investment, Current	$ 282	$ 277
Financing Receivable, Troubled Debt Restructuring, Modification, Recorded Investment, 30 To 89 Days Past Due	18	19
Financing Receivable, Troubled Debt Restructuring, Modification, Recorded Investment, 90 To 179 Days Past Due	9	11
Financing Receivable, Troubled Debt Restructuring, Modification, Recorded Investment, 180 Plus Days Past Due	26	27
Financing Receivable, Troubled Debt Restructuring, Modification, Recorded Investment	335	334
Financing Receivable, Troubled Debt Restructuring, Modification And Bankruptcy Notification, Recorded Investment	43	42
One- To Four-Family [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Troubled Debt Restructuring, Modification, Recorded Investment, Current	137	138
Financing Receivable, Troubled Debt Restructuring, Modification, Recorded Investment, 30 To 89 Days Past Due	9	11
Financing Receivable, Troubled Debt Restructuring, Modification, Recorded Investment, 90 To 179 Days Past Due	4	5
Financing Receivable, Troubled Debt Restructuring, Modification, Recorded Investment, 180 Plus Days Past Due	13	16
Financing Receivable, Troubled Debt Restructuring, Modification, Recorded Investment	163	170
Home Equity [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Troubled Debt Restructuring, Modification, Recorded Investment, Current	145	139
Financing Receivable, Troubled Debt Restructuring, Modification, Recorded Investment, 30 To 89 Days Past Due	9	8
Financing Receivable, Troubled Debt Restructuring, Modification, Recorded Investment, 90 To 179 Days Past Due	5	6
Financing Receivable, Troubled Debt Restructuring, Modification, Recorded Investment, 180 Plus Days Past Due	13	11
Financing Receivable, Troubled Debt Restructuring, Modification, Recorded Investment	$ 172	$ 164