CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2020	Mar. 31, 2019
OPERATING ACTIVITIES
Net income		$ 34	$ 439
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for credit losses		600	85
Net change in loans held for sale		(860)	116
Depreciation, amortization and accretion		201	132
Amortization of intangibles		3	2
Deferred income taxes		(134)	(1)
Share-based compensation		21	20
Net gain on sales of:
Debt securities		0	(8)
Premises and equipment		0	(6)
Increase in other assets		(1,022)	(96)
Decrease in other liabilities		(170)	(211)
Net cash (used in) provided by operating activities		(1,327)	472
Investment securities:
Purchases of debt securities available for sale		(2,102)	(2,047)
Proceeds from maturities and paydowns of debt securities available for sale		1,010	695
Proceeds from sales of debt securities available for sale		0	821
Proceeds from maturities and paydowns of debt securities held to maturity		131	80
Net increase in equity securities, at fair value		0	(17)
Net (increase) decrease in equity securities, at cost		(120)	230
Net decrease (increase) in interest-bearing deposits in banks		17	(19)
Acquisitions, net of cash acquired		(3)	(129)
Net increase in loans and leases		(7,630)	(1,047)
Capital expenditures, net		(16)	15
Other		(55)	(53)
Net cash used in investing activities		(8,768)	(1,471)
FINANCING ACTIVITIES
Net increase in deposits		8,162	4,341
Net increase (decrease) in short-term borrowed funds		780	(638)
Proceeds from issuance of long-term borrowed funds		6,800	2,750
Repayments of long-term borrowed funds		(4,500)	(7,002)
Treasury stock purchased		(270)	(200)
Net proceeds from issuance of preferred stock		0	292
Dividends declared and paid to common stockholders		(168)	(149)
Dividends declared and paid to preferred stockholders		(23)	(15)
Payments of employee tax withholding for share-based compensation		(14)	(18)
Net cash provided by (used in) financing activities		10,767	(639)
(Decrease) increase in cash and cash equivalents	[1]	672	(1,638)
Cash and cash equivalents at beginning of period	[1]	3,386	4,074
Cash and cash equivalents at end of period	[1]	$ 4,058	$ 2,436

[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.