Net Revenue (Details - Interest Income and Interest Expense) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Interest income:
Cash and equivalents	$ 11	$ 9	$ 7
Cash segregated under federal or other regulations	15	12	6
Investment securities(1)	1,241	962	691
Margin receivables	491	320	249
Loans	128	157	191
Broker-related receivables and other	14	3	1
Subtotal interest income	1,900	1,463	1,145
Other interest revenue(2)	109	108	88
Total interest income	2,009	1,571	1,233
Interest expense:
Deposits	51	4	3
Customer payables	22	5	5
Broker-related payables and other	10	0	0
Other borrowings	25	22	18
Corporate debt	46	48	54
Subtotal interest expense	154	79	80
Interest Expense, Other	9	7	5
Total interest expense	163	86	85
Net interest income	1,846	1,485	1,148
Gain (loss) on interest rate fair value hedge ineffectiveness	$ (19)	$ (14)	$ (6)