Condensed Consolidated Statements of Cash Flows - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Cash Flows from Operating Activities
Net income	$ 1,757	$ 1,367
Adjustments to reconcile net income to net cash provided by (used for) operating activities:
Provision for loan losses	0	(5)
Share-based compensation	111	101
Depreciation and amortization	200	173
Premium amortization, net, on available for sale securities and held to maturity securities	240	181
Other	35	25
Net change in:
Cash and investments segregated and on deposit for regulatory purposes	6,241	(479)
Receivables from brokers, dealers, and clearing organizations	61	(370)
Receivables from brokerage clients	(1,310)	928
Other securities owned	22	(325)
Other assets	(76)	(61)
Payables to brokers, dealers, and clearing organizations	(957)	(111)
Payables to brokerage clients	(4,414)	(224)
Accrued expenses and other liabilities	(82)	(226)
Net cash provided by (used for) operating activities	1,828	974
Cash Flows from Investing Activities
Purchases of available for sale securities	(6,375)	(22,782)
Proceeds from sales of available for sale securities	5,773	4,645
Principal payments on available for sale securities	6,532	8,652
Purchases of held to maturity securities	(19,886)	(19,439)
Principal payments on held to maturity securities	7,927	3,841
Net increase in bank loans	(829)	(600)
Purchases of equipment, office facilities, and property	(267)	(272)
Purchases of Federal Home Loan Bank stock	(160)	(152)
Proceeds from sales of Federal Home Loan Bank stock	106	88
Other investing activities	(52)	(25)
Net cash used for investing activities	(7,231)	(26,044)
Cash Flows from Financing Activities
Net change in bank deposits	1,809	20,128
Net proceeds from short-term borrowings	5,000	3,001
Issuance of long-term debt	643	0
Repayment of long-term debt	(256)	(5)
Net proceeds from preferred stock offering	0	725
Dividends paid	(456)	(365)
Proceeds from stock options exercised and other	98	31
Other financing activities	(10)	8
Net cash provided by financing activities	6,828	23,523
Increase (Decrease) in Cash and Cash Equivalents	1,425	(1,547)
Cash and Cash Equivalents at Beginning of Period	10,828	11,978
Cash and Cash Equivalents at End of Period	12,253	10,431
Cash paid during the period for:
Interest	233	141
Income taxes	890	757
Non-cash investing activity:
Securities purchased during the period but settled after period end	$ 3,977	$ 1,021