Consolidated Statement of Cash Flows (unaudited) - USD ($) $ in Millions		9 Months Ended
		Sep. 30, 2023	Sep. 30, 2022
Operating activities
Net income		$ 944	$ 1,436
Reconciliation of net income to net cash provided by operating activities
Depreciation and amortization		923	1,000
Provision for credit losses		1,381	909
Gain on mortgage and automotive loans, net		(13)	(28)
Other (gain) loss on investments, net		(59)	173
Originations and purchases of loans held-for-sale		(1,913)	(3,394)
Proceeds from sales and repayments of loans held-for-sale		2,283	3,118
Net change in
Deferred income taxes		(62)	447
Interest payable		1,029	274
Other assets		29	1,120
Other liabilities		52	(88)
Other, net		86	107
Net cash provided by operating activities		4,680	5,074
Investing activities
Purchases of equity securities		(257)	(515)
Proceeds from sales of equity securities		295	808
Purchases of available-for-sale securities		(388)	(6,346)
Proceeds from sales of available-for-sale securities		337	768
Proceeds from repayments of available-for-sale securities		1,631	3,720
Purchases of held-to-maturity securities		0	(47)
Proceeds from repayments of held-to-maturity securities		49	133
Purchases of finance receivables and loans held-for-investment		(3,201)	(6,360)
Proceeds from sales of finance receivables and loans initially held-for-investment		25	12
Originations and repayments of finance receivables and loans held-for-investment and other, net		(2,452)	(5,050)
Purchases of operating lease assets		(2,174)	(2,840)
Disposals of operating lease assets		2,384	2,449
Net change in nonmarketable equity investments		(45)	(261)
Other, net		(419)	(379)
Net cash used in investing activities		(4,215)	(13,908)
Financing activities
Net change in short-term borrowings		11	7,200
Net increase in deposits		525	4,166
Proceeds from issuance of long-term debt		4,893	4,867
Repayments of long-term debt		(2,609)	(5,314)
Purchases of land and buildings in satisfaction of finance lease liabilities		0	(44)
Repurchases of common stock		(29)	(1,599)
Common stock dividends paid		(277)	(298)
Preferred stock dividends paid		(83)	(83)
Net cash provided by financing activities		2,431	8,895
Effect of exchange-rate changes on cash and cash equivalents and restricted cash		0	(9)
Net increase in cash and cash equivalents and restricted cash		2,896	52
Cash and cash equivalents and restricted cash at beginning of year		6,222	5,670
Cash and cash equivalents and restricted cash at September 30,		9,118	5,722
Cash paid (received) for
Interest		3,895	1,342
Income taxes		(42)	(427)
Noncash items
Loans held-for-sale transferred to finance receivables and loans held-for-investment		208	92
Finance receivables and loans held-for-investment transferred to loans held-for-sale		11	4
Transfer of equity-method investments to equity securities		0	40
Transfer of nonmarketable equity investments to equity securities		19	1
Additional Cash Flow Elements and Supplemental Cash Flow Information [Abstract]
Cash and cash equivalents on the Condensed Consolidated Balance Sheet		8,515	5,004
Restricted cash included in other assets on the Condensed Consolidated Balance Sheet	[1]	603	718
Total cash and cash equivalents and restricted cash in the Condensed Consolidated Statement of Cash Flows		$ 9,118	$ 5,722

[1] Restricted cash balances relate primarily to our securitization arrangements. Refer to Note 10 for additional details describing the nature of restricted cash balances.