CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Operating activities:
Income from continuing operations, net of tax	$ 6,025	$ 2,117	$ 3,770
Loss from discontinued operations, net of tax	(10)	(135)	(19)
Net income	6,015	1,982	3,751
Adjustments to reconcile net income to net cash from operating activities:
Benefit for credit losses	5,856	7,551	6,459
Depreciation and amortization, net	2,396	2,440	2,428
Deferred tax provision (benefit)	714	1,434	(686)
Net securities losses (gains)	209	(65)	11
Gain on sales of loans	(548)	(72)	(80)
Stock-based compensation expense	170	244	239
Other	(125)	(8)	(11)
Loans held for sale:
Originations and purchases	(9,039)	(8,929)	(8,645)
Proceeds from sales and paydowns	8,442	9,595	8,390
Changes in operating assets and liabilities:
Changes in interest receivable	(74)	(157)	(159)
Changes in other assets	476	(714)	(1,907)
Changes in interest payable	45	85	28
Changes in other liabilities	(1,553)	1,157	2,013
Net change from discontinued operations	(6)	(361)	25
Net cash from operating activities	12,978	14,182	11,856
Securities available for sale:
Purchases	(14,022)	(12,412)	(14,154)
Proceeds from paydowns and maturities	7,510	7,213	7,867
Proceeds from sales	6,399	8,181	4,146
Securities held to maturity:
Purchases	(19,166)	(5,885)	(3,787)
Proceeds from paydowns and maturities	2,419	2,594	2,681
Loans:
Net changes in loans held for investment	1,015	(12,315)	(22,036)
Principal recoveries of loans previously charged off	2,503	1,951	1,493
Net purchases of premises and equipment	(874)	(1,018)	(779)
Net cash from acquisition activities	(600)	(3,187)	(629)
Net cash from other investing activities	(802)	(663)	(432)
Net cash from investing activities	(15,618)	(15,541)	(25,630)
Financing activities:
Changes in deposits	6,077	6,993	19,031
Issuance of securitized debt obligations	997	5,983	6,259
Maturities and paydowns of securitized debt obligations	(2,673)	(7,233)	(3,540)
Issuance of senior and subordinated notes and long-term FHLB advances	5,977	35,426	22,984
Maturities and paydowns of senior and subordinated notes and long-term FHLB advances	(14,163)	(36,554)	(24,170)
Changes in other borrowings	8,671	(400)	11
Common stock:
Net proceeds from issuances	175	164	131
Dividends paid	(773)	(780)	(812)
Preferred stock:
Net proceeds from issuances	0	0	1,066
Dividends paid	(265)	(265)	(214)
Purchases of treasury stock	(2,284)	(240)	(3,661)
Proceeds from share-based payment activities	38	124	142
Net cash from financing activities	1,777	3,218	17,227
Changes in cash, cash equivalents and restricted cash for securitization investors	(863)	1,859	3,453
Cash, cash equivalents and restricted cash for securitization investors, beginning of the period	14,352	12,493	9,040
Cash, cash equivalents and restricted cash for securitization investors, end of the period	13,489	14,352	12,493
Non-cash items:
Net transfers from loans held for investment to loans held for sale	855	674	552
Securitized debt obligations assumed in acquisition	0	2,484	0
Loans held for sale acquired by assuming other borrowings	0	283	0
Interest paid	3,933	2,772	2,250
Income tax paid	$ 407	$ 1,187	$ 2,121