Loans Receivable, Net (Details - TDRs Accrual and Nonaccrual) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Financing Receivable, Impaired [Line Items]
Recorded Investment in TDRs	$ 488	$ 533
Financing Receivable, Troubled Debt Restructurings, Modifications, Total1	334	354
Financing Receivable, Troubled Debt Restructurings, Bankruptcy Notifications	154	179
Performing Financial Instruments [Member]
Financing Receivable, Impaired [Line Items]
Accrual TDRs	226	248
Nonperforming Financial Instruments [Member]
Financing Receivable, Impaired [Line Items]
Nonaccrual TDRs, Current	148	162
Nonaccrual TDRs, 30-89 Days Delinquent	30	38
Nonaccrual TDRs, 90-179 Days Delinquent	16	18
Nonaccrual TDRs, 180 Plus Days Delinquent	68	67
One- To Four-Family [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment in TDRs	286	316
TDR unpaid principal balance	283	314
One- To Four-Family [Member] | Performing Financial Instruments [Member]
Financing Receivable, Impaired [Line Items]
Accrual TDRs	106	121
One- To Four-Family [Member] | Nonperforming Financial Instruments [Member]
Financing Receivable, Impaired [Line Items]
Nonaccrual TDRs, Current	106	111
Nonaccrual TDRs, 30-89 Days Delinquent	19	24
Nonaccrual TDRs, 90-179 Days Delinquent	8	12
Nonaccrual TDRs, 180 Plus Days Delinquent	47	48
Home Equity [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment in TDRs	202	217
Home Equity [Member] | Performing Financial Instruments [Member]
Financing Receivable, Impaired [Line Items]
Accrual TDRs	120	127
Home Equity [Member] | Nonperforming Financial Instruments [Member]
Financing Receivable, Impaired [Line Items]
Nonaccrual TDRs, Current	42	51
Nonaccrual TDRs, 30-89 Days Delinquent	11	14
Nonaccrual TDRs, 90-179 Days Delinquent	8	6
Nonaccrual TDRs, 180 Plus Days Delinquent	$ 21	$ 19