Loans Receivable, Net (Details - Allowance) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Financing Receivables, Allowance for Credit Losses [Line Items]
Allowance for loan losses, beginning of period	$ 353	$ 404
Provision (benefit) for loan losses	(34)	5
Charge-offs	(8)	(14)
Recoveries	11	7
Charge-offs, net	3	(7)
Allowance for loan losses, end of period	322	402
Repurchase Settlements Amount	3
Increase (Decrease) in Finance Receivables	$ 300
Financing Receivable, Allowance for Credit Losses, Percentage of Gross Loans Receivable	6.90%		7.10%
One- To Four-Family [Member]
Financing Receivables, Allowance for Credit Losses [Line Items]
Allowance for loan losses, beginning of period	$ 40	27
Provision (benefit) for loan losses	8	5
Charge-offs	(1)	(1)
Recoveries	2	0
Charge-offs, net	1	(1)
Allowance for loan losses, end of period	49	31
Home Equity [Member]
Financing Receivables, Allowance for Credit Losses [Line Items]
Allowance for loan losses, beginning of period	307	367
Provision (benefit) for loan losses	(42)	(2)
Charge-offs	(5)	(10)
Recoveries	7	5
Charge-offs, net	2	(5)
Allowance for loan losses, end of period	267	360
Consumer And Other [Member]
Financing Receivables, Allowance for Credit Losses [Line Items]
Allowance for loan losses, beginning of period	6	10
Provision (benefit) for loan losses	0	2
Charge-offs	(2)	(3)
Recoveries	2	2
Charge-offs, net	0	(1)
Allowance for loan losses, end of period	$ 6	$ 11