Condensed Consolidated Statements of Cash Flows - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	[1]
Cash Flows from Operating Activities
Net income	$ 783	$ 564
Adjustments to reconcile net income to net cash provided by (used for) operating activities:
Share-based compensation	50	52
Depreciation and amortization	73	65
Premium amortization, net, on available for sale securities and held to maturity securities	96	72
Other	36	12
Net change in:
Investments segregated and on deposit for regulatory purposes	853	(550)
Receivables from brokers, dealers, and clearing organizations	(245)	11
Receivables from brokerage clients	(595)	424
Other securities owned	39	(115)
Other assets	(16)	4
Payables to brokers, dealers, and clearing organizations	(325)	(346)
Payables to brokerage clients	(155)	(1,627)
Accrued expenses and other liabilities	(346)	(143)
Net cash provided by (used for) operating activities	248	(1,577)
Cash Flows from Investing Activities
Purchases of available for sale securities	(4,631)	(1,992)
Proceeds from sales of available for sale securities	0	1,064
Principal payments on available for sale securities	2,695	3,067
Purchases of held to maturity securities	(8,235)	(9,301)
Principal payments on held to maturity securities	3,548	1,731
Net change in bank loans	74	(134)
Purchases of equipment, office facilities, and property	(122)	(80)
Proceeds from sales of Federal Home Loan Bank stock	172	64
Other investing activities	(40)	(6)
Net cash provided by (used for) investing activities	(6,539)	(5,587)
Cash Flows from Financing Activities
Net change in bank deposits	20,528	3,435
Net change in short-term borrowings	(15,000)	600
Issuance of long-term debt	0	643
Repayment of long-term debt	(627)	(2)
Dividends paid	(184)	(158)
Proceeds from stock options exercised and other	49	58
Other financing activities	(10)	(8)
Net cash provided by (used for) financing activities	4,756	4,568
Increase (Decrease) in Cash and Cash Equivalents, including Amounts Restricted	(1,535)	(2,596)
Cash and Cash Equivalents, including Amounts Restricted at Beginning of Period	19,160	17,873
Cash and Cash Equivalents, including Amounts Restricted at End of Period	17,625	15,277
Supplemental Cash Flow Information
Interest	169	75
Income taxes	3	8
Non-cash investing activity:
Securities purchased during the period but settled after period end	$ 160	$ 581

[1] Adjusted for the retrospective adoption of ASU 2016-18. See Note 2.