Condensed Consolidated Statement of Cash Flows - USD ($) $ in Millions		9 Months Ended
		Sep. 30, 2022	Sep. 30, 2021
Operating activities
Net income		$ 1,436	$ 2,408
Reconciliation of net income to net cash provided by operating activities
Depreciation and amortization		1,000	931
Provision for credit losses		909	31
Gain on mortgage and automotive loans, net		(28)	(73)
Other loss (gain) on investments, net		173	(212)
Loss on extinguishment of debt		0	126
Originations and purchases of loans held-for-sale		(3,394)	(3,136)
Proceeds from sales and repayments of loans held-for-sale		3,118	3,186
Net change in
Deferred income taxes		447	(558)
Interest payable		274	10
Other assets		1,120	19
Other liabilities		(88)	419
Other, net		107	(68)
Net cash provided by operating activities		5,074	3,083
Investing activities
Purchases of equity securities		(515)	(1,117)
Proceeds from sales of equity securities		808	1,280
Purchases of available-for-sale securities		(6,346)	(17,211)
Proceeds from sales of available-for-sale securities		768	4,870
Proceeds from repayments of available-for-sale securities		3,720	8,725
Purchases of held-to-maturity securities		(47)	(201)
Proceeds from repayments of held-to-maturity securities		133	303
Purchases of finance receivables and loans held-for-investment		(6,360)	(5,466)
Proceeds from sales of finance receivables and loans initially held-for-investment		12	376
Originations and repayments of finance receivables and loans held-for-investment and other, net		(5,050)	8,669
Purchases of operating lease assets		(2,840)	(4,231)
Disposals of operating lease assets		2,449	2,618
Net change in nonmarketable equity investments		(261)	104
Other, net		(379)	(294)
Net cash used in investing activities		(13,908)	(1,575)
Financing activities
Net change in short-term borrowings		7,200	(2,136)
Net increase in deposits		4,166	2,398
Proceeds from issuance of long-term debt		4,867	253
Repayments of long-term debt		(5,314)	(4,812)
Purchases of land and buildings in satisfaction of finance lease liabilities		(44)	(391)
Repurchases of common stock		(1,599)	(1,400)
Preferred stock issuance		0	2,324
Trust preferred securities redemption		0	(2,513)
Common stock dividends paid		(298)	(237)
Preferred stock dividends paid		(83)	(29)
Net cash provided by (used in) financing activities		8,895	(6,543)
Effect of exchange-rate changes on cash and cash equivalents and restricted cash		(9)	0
Net decrease (increase) in cash and cash equivalents and restricted cash		52	(5,035)
Cash and cash equivalents and restricted cash at beginning of year		5,670	16,574
Cash and cash equivalents and restricted cash at September 30,		5,722	11,539
Cash paid (received) for
Interest		1,342	1,422
Income taxes		(427)	1,235
Noncash items
Loans held-for-sale transferred to finance receivables and loans held-for-investment		92	5
Additions of property and equipment		0	46
Finance receivables and loans held-for-investment transferred to loans held-for-sale		4	414
Transfer of equity-method investments to equity securities		40	0
Transfer of nonmarketable equity investments to equity securities		1	0
Additional Cash Flow Elements and Supplemental Cash Flow Information [Abstract]
Cash and cash equivalents on the Condensed Consolidated Balance Sheet		5,004	10,915
Restricted cash included in other assets on the Consolidated Balance Sheet	[1]	718	624
Total cash and cash equivalents and restricted cash in the Condensed Consolidated Statement of Cash Flows		$ 5,722	$ 11,539

[1] Restricted cash balances relate primarily to our securitization arrangements. Refer to Note 11 for additional details describing the nature of restricted cash balances.