Consolidated Statement of Cash Flows - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2023	Mar. 31, 2022
Operating activities
Net income		$ 319	$ 655
Reconciliation of net income to net cash provided by operating activities
Depreciation and amortization		317	339
Provision for credit losses		446	167
Gain on mortgage and automotive loans, net		(4)	(14)
Other gain on investments, net		(74)	(5)
Originations and purchases of loans held-for-sale		(844)	(1,355)
Proceeds from sales and repayments of loans held-for-sale		1,068	1,465
Net change in
Deferred income taxes		24	183
Interest payable		351	92
Other assets		(43)	214
Other liabilities		(208)	(122)
Other, net		80	22
Net cash provided by operating activities		1,432	1,641
Investing activities
Purchases of equity securities		(45)	(349)
Proceeds from sales of equity securities		87	548
Purchases of available-for-sale securities		(152)	(3,962)
Proceeds from sales of available-for-sale securities		307	474
Proceeds from repayments of available-for-sale securities		477	1,508
Proceeds from repayments of held-to-maturity securities		15	59
Purchases of finance receivables and loans held-for-investment		(818)	(1,364)
Proceeds from sales of finance receivables and loans initially held-for-investment		4	1
Originations and repayments of finance receivables and loans held-for-investment and other, net		(103)	(2,240)
Purchases of operating lease assets		(741)	(946)
Disposals of operating lease assets		706	865
Net change in nonmarketable equity investments		(2)	(116)
Other, net		(117)	(163)
Net cash used in investing activities		(382)	(5,685)
Financing activities
Net change in short-term borrowings		(944)	3,950
Net increase in deposits		1,715	916
Proceeds from issuance of long-term debt		3,129	1,059
Repayments of long-term debt		(426)	(2,222)
Repurchases of common stock		(27)	(584)
Common stock dividends paid		(96)	(104)
Preferred stock dividends paid		(28)	(28)
Net cash provided by financing activities		3,323	2,987
Effect of exchange-rate changes on cash and cash equivalents and restricted cash		0	2
Net increase (decrease) in cash and cash equivalents and restricted cash		4,373	(1,055)
Cash and cash equivalents and restricted cash at beginning of year		6,222	5,670
Cash and cash equivalents and restricted cash at March 31,		10,595	4,615
Cash paid (received) for
Interest		1,085	292
Income taxes		(150)	21
Noncash items
Loans held-for-sale transferred to finance receivables and loans held-for-investment		75	25
Additional Cash Flow Elements and Supplemental Cash Flow Information [Abstract]
Cash and cash equivalents on the Condensed Consolidated Balance Sheet		9,780	3,932
Restricted cash included in other assets on the Condensed Consolidated Balance Sheet	[1]	815	683
Total cash and cash equivalents and restricted cash in the Condensed Consolidated Statement of Cash Flows		$ 10,595	$ 4,615

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