Consolidated Statements Of Cash Flows - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Real Estate Owned, Transfer to Real Estate Owned	$ 2	$ 1	$ 4	$ 7
Transfer of Portfolio Loans and Leases to Held-for-sale	12	2	23	4
Available for sale securities purchased, not settled	0	0	56	0
Held to Maturity Securities Purchased, Not Settled	0	0	31	0
CASH FLOWS FROM OPERATING ACTIVITIES
Net income for the period	168	114	308	204
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Provision for credit losses	10	31	28	67
Depreciation and amortization	47	29	84	54
Share-based Compensation	5	5	17	16
Deferred income tax expense (benefit)	(5)	(6)	8	(11)
Net decrease (increase) in trading securities	(22)	(53)	54	(71)
Net decrease (increase) in loans held for sale	53	(36)	89	3
Change in other liabilities	(63)	145	(21)	163
Change in other assets	12	(225)	33	(218)
Other, net	(10)	(8)	(24)	(5)
Net cash provided by (used in) operating activities	195	(4)	576	202
CASH FLOWS FROM INVESTING ACTIVITIES
Net decrease in money market investments	530	1,850	385	3,952
Proceeds from maturities and paydowns of investment securities held-to-maturity	75	10	166	32
Purchases of investment securities held-to-maturity	(66)	(92)	(73)	(200)
Proceeds from sales, maturities, and paydowns of investment securities available-for-sale	630	476	1,160	2,574
Purchases of investment securities available-for-sale	(353)	(1,244)	(3,466)	(4,367)
Net change in loans and leases	(919)	(1,105)	(1,036)	(1,898)
Net change in other noninterest-bearing investments	(29)	9	(103)	(3)
Purchases of premises and equipment	(44)	(52)	(94)	(92)
Proceeds from sales of other real estate owned	1	5	4	9
Other, net	2	1	4	3
Net cash provided by (used in) investing activities	(173)	(142)	(3,053)	10
CASH FLOWS FROM FINANCING ACTIVITIES
Net increase (decrease) in deposits	(1,099)	407	(858)	(79)
Net change in short-term funds borrowed	205	38	2,015	(77)
Proceeds from debt over 90 days and up to one year	1,250	0	1,750	0
Repayments of debt over 90 days and up to one year	(250)	0	(250)	0
Cash paid for preferred stock redemption	(144)	(126)	(144)	(126)
Repayments of long-term debt	0	(104)	(153)	(115)
Proceeds from Issuance of Common Stock	9	2	18	3
Dividends paid on common and preferred stock	(26)	(23)	(55)	(50)
Company common stock repurchased and retired	(52)	(5)	(102)	(6)
Net cash provided by (used in) financing activities	(107)	189	2,221	(450)
Net increase (decrease) in cash and due from banks	(85)	43	(256)	(238)
Cash and due from banks at beginning of period	566	517	737	798
Cash and due from banks at end of period	481	560	481	560
Cash paid for interest	30	25	52	43
Net cash paid for income taxes	$ 128	$ 102	$ 122	$ 101