Loans Receivable, Net (Details - TDRs Specific Valuation Allowance) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Impaired Financing Receivable With And With No Related Allowance [Line Items]
Specific valuation allowance	$ 15	$ 24
One- To Four-Family [Member]
Impaired Financing Receivable With And With No Related Allowance [Line Items]
Impaired Financing Receivable, With Related Allowance, Recorded Investment	45	50
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	123	137
Impaired Financing Receivable, Recorded Investment	168	187
Specific valuation allowance	5	5
Impaired Financing Receivable, with Related Allowance, Net Investment	40	45
Impaired Financing Receivable, with No Related Allowance, Net Investment	123	137
Impaired Financing Receivables, Net Investment, Total	163	182
Home Equity [Member]
Impaired Financing Receivable With And With No Related Allowance [Line Items]
Impaired Financing Receivable, With Related Allowance, Recorded Investment	45	60
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	67	78
Impaired Financing Receivable, Recorded Investment	112	138
Specific valuation allowance	10	19
Impaired Financing Receivable, with Related Allowance, Net Investment	35	41
Impaired Financing Receivable, with No Related Allowance, Net Investment	67	78
Impaired Financing Receivables, Net Investment, Total	$ 102	$ 119

Amount of net investment in impaired financing receivables for which there is no related allowance for credit losses.

No definition available.

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- Definition

Amount of net investment in impaired financing receivables for which there is a related allowance for credit losses.

+ References

No definition available.

+ Details

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- Definition

Amounf of net investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses.

+ References

No definition available.

+ Details

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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- Definition

Amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 14A
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=118936363&loc=SL6953550-111524

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- Definition

Amount of allowance for credit losses related to recorded investment.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (a)(3)
-URI http://asc.fasb.org/extlink&oid=118936363&loc=d3e5212-111524

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- Definition

Amount of investment in impaired financing receivables for which there is no related allowance for credit losses.

+ References

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- Definition

Amount of investment in impaired financing receivables for which there is a related allowance for credit losses.

+ References

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