Other Borrowings and Corporate Debt (Details - Other Borrowings) $ in Millions	Jun. 30, 2020 USD ($)
Revolving Credit Facility [Member] | Parent Company [Member] | June 2024 Maturity [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Fair Value of Amount Outstanding	$ 0
Line of Credit Facility, Maximum Borrowing Capacity	300
Revolving Credit Facility [Member] | E TRADE Securities [Member] | June 2021 Maturity [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Fair Value of Amount Outstanding	0
Line of Credit Facility, Maximum Borrowing Capacity	550
FHLB secured credit facility [Member] | E TRADE Bank [Member] | Determined at Trade [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Fair Value of Amount Outstanding	0
Line of Credit Facility, Maximum Borrowing Capacity	5,960
Federal Reserve Bank discount window [Member] | E TRADE Bank [Member] | Overnight [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Fair Value of Amount Outstanding	0
Line of Credit Facility, Maximum Borrowing Capacity	1,077
Secured Committed Line of Credit [Member] | E TRADE Securities [Member] | June 2021 Maturity [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Fair Value of Amount Outstanding	0
Line of Credit Facility, Maximum Borrowing Capacity	175
Unsecured Uncommitted Line of Credit [Member] | E TRADE Securities [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Fair Value of Amount Outstanding	0
Line of Credit Facility, Maximum Borrowing Capacity	75
Line Of Credit Not Renewed	50
Secured Uncommitted Line of Credit [Member] | E TRADE Securities [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Fair Value of Amount Outstanding	0
Line of Credit Facility, Maximum Borrowing Capacity	$ 425