CONDENSED CONSOLIDATED STATEMENT OF CASH FLOWS - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017		Dec. 31, 2016	Dec. 31, 2015
Cash flows from operating activities:
Net income	$ 614		$ 552	$ 268
Adjustments to reconcile net income to net cash provided by operating activities:
Provision (benefit) for loan losses	(168)		(149)	(40)
Depreciation and amortization (including discount amortization and accretion)	262		239	325
(Gains) losses on securities and other, net	(28)		(42)	324
Losses on early extinguishment of debt, net	9		0	37
Share-based compensation	41		30	34
Deferred tax expense (benefit)	450		275	(176)
Other	(7)		(5)	1
Net effect of changes in assets and liabilities:
Decrease (increase) in cash required to be segregated under federal or other regulations	588		(403)	(502)
(Increase) decrease in receivables from brokers, dealers and clearing organizations	(134)		(528)	364
(Increase) decrease in margin receivables	(2,340)		667	277
(Increase) decrease in other assets	(49)		2	(22)
Increase (decrease) in payables to brokers, dealers and clearing organizations	559		(593)	(123)
Increase in customer payables	1,290		1,615	89
Increase (decrease) in other liabilities	34		(14)	(13)
Net cash provided by operating activities	1,121		1,646	843
Cash flows from investing activities:
Purchases of available-for-sale securities	(9,819)		(6,705)	(6,150)
Proceeds from sales of available-for-sale securities	1,645		3,194	3,905
Proceeds from maturities of and principal payments on available-for-sale securities	1,588		1,540	1,667
Purchases of held-to-maturity securities	(10,519)		(4,389)	(2,614)
Proceeds from maturities of and principal payments on held-to-maturity securities	2,556		2,068	1,788
Proceeds from sale of loans	40		0	40
Decrease in loans receivable	983		1,176	1,337
Capital expenditures for property and equipment	(102)		(75)	(70)
Proceeds from sale of real estate owned and repossessed assets	29		20	28
Acquisition of OptionsHouse, net of cash acquired	0		(723)	0
Net cash flow from derivative contracts	66		(109)	(2)
Other	(43)		(1)	73
Net cash (used in) provided by investing activities	(13,576)		(4,004)	2
Cash flows from financing activities:
Increase in deposits	11,060		2,237	4,555
Preferred stock dividends	(25)		0	0
Net decrease in securities sold under agreements to repurchase	0		(82)	(3,590)
Advances from FHLB	1,850		0	960
Payments on advances from FHLB	(1,350)		0	(1,880)
Proceeds from issuance of senior notes	999		0	460
Payments on senior notes	(1,000)		0	(800)
Repurchases of trust preferred securities	0		0	(15)
Proceeds from issuance of preferred stock	300		400	0
Repurchases of common stock	(362)		(452)	(50)
Net cash flow from derivatives hedging liabilities	0		0	(16)
Other	(36)		(28)	(19)
Net cash provided by (used in) financing activities	11,436		2,075	(395)
(Decrease) increase in cash and equivalents	(1,019)		(283)	450
Cash and equivalents, beginning of period	1,950		2,233	1,783
Cash and equivalents, end of period	931		1,950	2,233
Supplemental disclosures:
Cash paid for interest(1)	126	[1]	77	212
Cash paid for income taxes, net of refunds	8		6	8
Non-cash investing and financing activities:
Transfers of loans held-for-investment to loans held-for-sale	57		0	39
Transfers from loans to other real estate owned and repossessed assets	27		34	27
Conversion of convertible debentures to common stock	3		5	30
Transfer of available-for-sale securities to held-to-maturity securities	0		$ 492	0
Early redemption premium on corporate debt	$ 49			$ 75

[1] (1)Includes early redemption premium of $49 million and $75 million paid in connection with debt extinguishment transactions during the year ended December 31, 2017 and 2015, respectively.