Loans Receivable, Net (Details - Allowance) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Financing Receivables, Allowance for Credit Losses [Line Items]
Allowance for loan losses, beginning of period	$ 404	$ 453	$ 481
Provision (benefit) for loan losses	(40)	36	143
Charge-offs	(44)	(126)	(231)
Recoveries	33	41	60
Charge-offs, net	(11)	(85)	(171)
Allowance for loan losses, end of period	353	$ 404	453
Increase (Decrease) in Finance Receivables	$ 1,400
Financing Receivable, Allowance for Credit Losses, Percentage of Gross Loans Receivable	7.00%	6.00%
Repurchase Settlements	$ 2	$ 11
One- To Four-Family [Member]
Financing Receivables, Allowance for Credit Losses [Line Items]
Allowance for loan losses, beginning of period	27	102	184
Provision (benefit) for loan losses	15	(42)	(55)
Charge-offs	(2)	(44)	(41)
Recoveries	0	11	14
Charge-offs, net	(2)	(33)	(27)
Allowance for loan losses, end of period	40	27	102
Home Equity [Member]
Financing Receivables, Allowance for Credit Losses [Line Items]
Allowance for loan losses, beginning of period	367	326	257
Provision (benefit) for loan losses	(55)	82	192
Charge-offs	(31)	(65)	(157)
Recoveries	26	24	34
Charge-offs, net	(5)	(41)	(123)
Allowance for loan losses, end of period	307	367	326
Consumer And Other [Member]
Financing Receivables, Allowance for Credit Losses [Line Items]
Allowance for loan losses, beginning of period	10	25	40
Provision (benefit) for loan losses	0	(4)	6
Charge-offs	(11)	(17)	(33)
Recoveries	7	6	12
Charge-offs, net	(4)	(11)	(21)
Allowance for loan losses, end of period	$ 6	$ 10	$ 25