CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Millions		6 Months Ended
		Jun. 30, 2020	Jun. 30, 2019
OPERATING ACTIVITIES
Net income		$ 287	$ 892
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for credit losses		1,064	182
Net change in loans held for sale		(737)	(471)
Depreciation, amortization and accretion		310	270
Amortization of intangibles		6	5
Deferred income taxes		(208)	(10)
Share-based compensation		23	32
Net gain on sales of:
Debt securities		(3)	(16)
Premises and equipment		0	(7)
Increase in other assets		(2,454)	(221)
Increase (decrease) in other liabilities		299	(79)
Net cash (used in) provided by operating activities		(1,413)	577
Investment securities:
Purchases of debt securities available for sale		(3,308)	(3,502)
Proceeds from maturities and paydowns of debt securities available for sale		2,521	1,625
Proceeds from sales of debt securities available for sale		0	1,250
Proceeds from maturities and paydowns of debt securities held to maturity		349	171
Net (increase) decrease in equity securities, at fair value		(3)	134
Net decrease in equity securities, at cost		200	128
Net increase in interest-bearing deposits in banks		(178)	(38)
Acquisitions, net of cash acquired		(3)	(129)
Net increase in loans and leases		(7,014)	(806)
Capital expenditures, net		(53)	(10)
Other		(110)	(111)
Net cash used in investing activities		(7,599)	(1,288)
FINANCING ACTIVITIES
Net increase in deposits		18,305	4,429
Net (decrease) increase in short-term borrowed funds		(18)	123
Proceeds from issuance of long-term borrowed funds		8,309	4,500
Repayments of long-term borrowed funds		(13,253)	(9,005)
Treasury stock purchased		(270)	(320)
Net proceeds from issuance of preferred stock		395	293
Dividends declared and paid to common stockholders		(336)	(297)
Dividends declared and paid to preferred stockholders		(45)	(30)
Payments of employee tax withholding for share-based compensation		(15)	(21)
Net cash provided by (used in) financing activities		13,072	(328)
(Decrease) increase in cash and cash equivalents	[1]	4,060	(1,039)
Cash and cash equivalents at beginning of period	[1]	3,386	4,074
Cash and cash equivalents at end of period	[1]	$ 7,446	$ 3,035

[1] Cash and cash equivalents includes cash and due from banks and interest-bearing cash and due from banks as reflected on the Consolidated Balance Sheets.