Condensed Consolidated Statements of Cash Flows - USD ($) $ in Millions		6 Months Ended
		Jun. 30, 2020	Jun. 30, 2019
Cash flows from operating activities
Net (loss) income		$ (429)	$ 1,479
Adjustments to reconcile net income to net cash provided by operating activities
Provision for credit losses	[1],[2]	3,853	1,596	[3]
Deferred income taxes		(531)	(50)
Depreciation and amortization		246	202
Amortization of deferred revenues and accretion of accretable yield on acquired loans		(165)	(201)
Net (gain) loss on investments and other assets		(51)	21
Other, net		68	39
Changes in assets and liabilities
Decrease (increase) in other assets		388	(23)
(Decrease) increase in accrued expenses and other liabilities		(112)	850
Net cash provided by operating activities		3,267	3,913
Cash flows from investing activities
Purchases of other short-term investments		(2,548)	(1,000)
Maturities of available-for-sale investment securities		438	70
Purchases of available-for-sale investment securities		0	(4,115)
Maturities of held-to-maturity investment securities		18	12
Purchases of held-to-maturity investment securities		(30)	(34)
Net principal repaid (disbursed) on loans originated for investment		5,614	(950)
Proceeds from sale of other investments		94	0
Purchases of other investments		(40)	(21)
Purchases of premises and equipment		(153)	(151)
Net cash provided by (used for) investing activities		3,393	(6,189)
Cash flows from financing activities
Proceeds from issuance of securitized debt		0	1,234
Maturities and repayment of securitized debt		(1,666)	(4,070)
Proceeds from issuance of other long-term borrowings		495	595
Maturities and repayment of other long-term borrowings		(1,753)	(7)
Proceeds from issuance of common stock		5	4
Purchases of treasury stock		(343)	(948)
Net increase in deposits		4,601	1,955
Proceeds from issuance of preferred stock		493	0
Dividends paid on common and preferred stock		(289)	(279)
Net cash provided by (used for) financing activities		1,543	(1,516)
Net increase (decrease) in cash, cash equivalents and restricted cash		8,203	(3,792)
Cash, cash equivalents and restricted cash, at beginning of period		6,964	15,145
Cash, cash equivalents and restricted cash, at end of period		15,167	11,353
Reconciliation of cash, cash equivalents and restricted cash
Cash and cash equivalents		15,138	10,313
Restricted cash		$ 29	$ 1,040

[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.