Condensed Consolidated Statements of Cash Flows - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2020	Mar. 31, 2019
Cash flows from operating activities
Net (loss) income		$ (61)	$ 726
Adjustments to reconcile net income to net cash provided by operating activities
Provision for credit losses	[1],[2]	1,807	809	[3]
Deferred income taxes		(240)	(19)
Depreciation and amortization		123	99
Amortization of deferred revenues and accretion of accretable yield on acquired loans		(86)	(101)
Net (gain) loss on investments and other assets		(23)	10
Other, net		10	18
Changes in assets and liabilities
Decrease (increase) in other assets		429	(29)
(Decrease) increase in accrued expenses and other liabilities		(279)	822
Net cash provided by operating activities		1,680	2,335
Cash flows from investing activities
Purchases of other short-term investments		0	(1,000)
Maturities of available-for-sale investment securities		157	34
Purchases of available-for-sale investment securities		0	(1,856)
Maturities of held-to-maturity investment securities		7	6
Purchases of held-to-maturity investment securities		(14)	(12)
Net principal repaid on loans originated for investment		2,268	1,148
Proceeds from sale of other investments		52	0
Purchases of other investments		(14)	(6)
Purchases of premises and equipment		(59)	(82)
Net cash provided by (used for) investing activities		2,397	(1,768)
Cash flows from financing activities
Proceeds from issuance of securitized debt		0	1,241
Maturities and repayment of securitized debt		(509)	(2,860)
Proceeds from issuance of other long-term borrowings		496	596
Maturities and repayment of other long-term borrowings		(1)	(3)
Proceeds from issuance of common stock		2	2
Purchases of treasury stock		(343)	(487)
Net increase in deposits		663	1,146
Dividends paid on common and preferred stock		(138)	(134)
Net cash provided by (used for) financing activities		170	(499)
Net increase in cash, cash equivalents and restricted cash		4,247	68
Cash, cash equivalents and restricted cash, at beginning of period		6,964	15,145
Cash, cash equivalents and restricted cash, at end of period		11,211	15,213
Reconciliation of cash, cash equivalents and restricted cash
Cash and cash equivalents		10,028	15,169
Restricted cash		$ 1,183	$ 44

[1] Prior to adoption of ASU No. 2016-13 on January 1, 2020, credit losses were estimated using the incurred loss approach.

[2] Prior to adoption of ASU No. 2016-13 on January 1, 2020, credit losses were estimated using the incurred loss approach.

[3] Prior to adoption of ASU No. 2016-13 on January 1, 2020, credit losses were estimated using the incurred loss approach.