Consolidated Statements of Cash Flows - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Gain (Loss) on Sale of Securities, Net	$ 4	$ 14
Cash Flows from Operating Activities:
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	944	916
Adjustments to reconcile net income/(loss) to net cash provided by operating activities:
Depreciation, Amortization and Accretion, Net	349	404
Payments to Acquire Mortgage Servicing Rights (MSR)	(110)	(117)
Provisions For Credit Losses And Foreclosed Properties	249	87
Stock Option Compensation And Amortization Of Restricted Stock Compensation	56	49
Excess Tax Benefit from Share-based Compensation, Operating Activities	(14)	(17)
Gain (Loss) on Sale of Loans and Leases	241	114
Net decrease/(increase) in loans held for sale	(472)	191
Increase (Decrease) in Trading Securities	(372)	(220)
Net (increase)/decrease in other assets	(61)	(310)
Increase (Decrease) in Other Operating Liabilities	(345)	(45)
Gain (Loss) on Extinguishment of Debt	0	0
Net Cash Provided by (Used in) Operating Activities	(21)	810
Cash Flows from Investing Activities:
Proceeds from Maturities, Prepayments and Calls of Available-for-sale Securities	2,283	3,194
Proceeds from sales of securities available for sale	0	1,477
Purchases of securities available for sale	(3,400)	(5,302)
Proceeds from sales of auction rate securities	0	0
Proceeds from (payments for) Originations and Purchases of Loans Held-for-investment	(5,777)	(894)
Proceeds from sales of loans	278	1,886
Payments for (Proceeds from) Mortgage Servicing Rights	75	112
Capital expenditures	(66)	(36)
Payments related to acquisitions, including contingent consideration	(23)	(30)
Proceeds from Divestiture of Businesses	0	0
Proceeds from Sale of Other Real Estate	118	126
Net Cash Provided by (Used in) Investing Activities	(6,662)	309
Cash Flows from Financing Activities:
Net (decrease)/increase in total deposits	2,921	4,370
Net increase/(decrease) in funds purchased, securities sold under agreements to repurchase, and other short-term borrowings	230	(3,069)
Proceeds from Issuance of Long-term Debt	4,892	1,195
Repayment of long-term debt	(1,034)	(3,987)
Payments for Repurchase of Common Stock	(326)	(290)
Payments for Repurchase of Warrants	(24)	0
Common and preferred dividends paid	(274)	(261)
Payments Related to Tax Withholding for Share-based Compensation	(46)	(31)
Net Cash Provided by (Used in) Financing Activities	6,349	(2,060)
Cash and Cash Equivalents, Period Increase (Decrease)	(334)	(941)
Cash and cash equivalents	5,599	8,229
Cash and cash equivalents	5,265	7,288
Proceeds from the exercise of stock options	10	13
Supplemental Disclosures:
Transfer of Loans Held-for-sale to Portfolio Loans	10	651
Transfer of Portfolio Loans and Leases to Held-for-sale	162	1,700
Transfer to Other Real Estate	29	35
Non-cash impact of debt acquired by purchaser in leverage lease sale	74	190
Provision for Mortgage Loan Repurchase Losses	$ 0	$ 0