CONDENSED CONSOLIDATED STATEMENT OF INCOME - USD ($) shares in Thousands, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Revenue:
Interest income	$ 409	$ 560	$ 852	$ 1,115
Interest expense	(21)	(70)	(64)	(133)
Net interest income	388	490	788	982
Gains (losses) on securities and other, net	23	(64)	43	(53)
Other revenue	11	12	24	24
Total non-interest income	328	195	635	458
Total net revenue	716	685	1,423	1,440
Provision (benefit) for credit losses	(1)	(8)	5	(20)
Non-interest expense:
Compensation and benefits	176	168	344	332
Advertising and market development	64	48	120	102
Clearing and servicing	47	32	91	62
Professional services	30	26	53	48
Occupancy and equipment	37	32	73	64
Communications	35	29	64	44
Depreciation and amortization	24	21	47	42
FDIC insurance premiums	3	4	7	8
Amortization of other intangibles	15	15	30	30
Restructuring and acquisition-related activities	2	0	18	0
Other non-interest expenses	20	23	51	41
Total non-interest expense	453	398	898	773
Income before income tax expense	264	295	520	687
Income tax expense	68	76	143	178
Net income	196	219	377	509
Preferred stock dividends	0	0	20	20
Net income available to common stockholders	$ 196	$ 219	$ 357	$ 489
Basic earnings per common share (in dollars per share)	$ 0.89	$ 0.90	$ 1.61	$ 2.00
Diluted earnings per common share (in dollars per share)	$ 0.88	$ 0.90	$ 1.61	$ 2.00
Basic (in thousands)	221,438	243,007	221,866	244,620
Diluted (in thousands)	221,693	243,465	222,218	245,190
Commissions [Member]
Non-interest Income
Revenue	$ 89	$ 121	$ 160	$ 243
Fees and service charges [Member]
Non-interest Income
Revenue	$ 205	$ 126	$ 408	$ 244