Loans Receivable, Net (Details - TDRs Specific Valuation Allowance) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Impaired Financing Receivable With And With No Related Allowance [Line Items]
Recorded Investment in TDRs	$ 488	$ 533
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	61	66
One- To Four-Family [Member]
Impaired Financing Receivable With And With No Related Allowance [Line Items]
Impaired Financing Receivable, With Related Allowance, Recorded Investment	72	88
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	214	228
Recorded Investment in TDRs	286	316
Impaired Financing Receivable, Related Allowance	9	9
Impaired Financing Receivable, with Related Allowance, Net Investment	63	79
Impaired Financing Receivable, with No Related Allowance, Net Investment	214	228
Impaired Financing Receivables, Net Investment, Total	277	307
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	9	9
Home Equity [Member]
Impaired Financing Receivable With And With No Related Allowance [Line Items]
Impaired Financing Receivable, With Related Allowance, Recorded Investment	111	118
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	91	99
Recorded Investment in TDRs	202	217
Impaired Financing Receivable, Related Allowance	52	57
Impaired Financing Receivable, with Related Allowance, Net Investment	59	61
Impaired Financing Receivable, with No Related Allowance, Net Investment	91	99
Impaired Financing Receivables, Net Investment, Total	150	160
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	$ 52	$ 57

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

No definition available.

Name:	etfc_ImpairedFinancingReceivableWithNoRelatedAllowanceNetImpaired
Namespace Prefix:	etfc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

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

+ References

No definition available.

+ Details

Name:	etfc_ImpairedFinancingReceivableWithRelatedAllowanceNetInvestment
Namespace Prefix:	etfc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- 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

Name:	etfc_ImpairedFinancingReceivablesNetInvestmentTotal
Namespace Prefix:	etfc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of valuation allowance for financing receivables that are expected to be uncollectible that were individually evaluated for impairment.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (g)
-URI http://asc.fasb.org/extlink&oid=49124121&loc=SL6953423-111524

+ Details

Name:	us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- 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

Name:	us-gaap_FinancingReceivableImpairedLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- 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://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 14A
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=49124121&loc=SL6953550-111524

+ Details

Name:	us-gaap_ImpairedFinancingReceivableRecordedInvestment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of allowance for credit losses related to recorded investment.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (a)(3)
-URI http://asc.fasb.org/extlink&oid=49124121&loc=d3e5212-111524

+ Details

Name:	us-gaap_ImpairedFinancingReceivableRelatedAllowance
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

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

+ References

+ Details

Name:	us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

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

+ References

+ Details

Name:	us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_RealEstateLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_HomeEquityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: