Condensed Consolidated Statement of Cash Flows (unaudited) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2024	Mar. 31, 2023
Operating activities
Net income		$ 157	$ 319
Reconciliation of net income to net cash provided by operating activities
Depreciation and amortization		322	317
Provision for credit losses		507	446
Gain on mortgage and automotive loans, net		(6)	(4)
Other gain on investments, net		(29)	(74)
Originations and purchases of loans held-for-sale		(698)	(844)
Proceeds from sales and repayments of loans held-for-sale		645	1,068
Net change in
Deferred income taxes		(1)	24
Interest payable		260	351
Other assets		142	(43)
Other liabilities		(38)	(208)
Other, net		80	80
Net cash provided by operating activities		1,341	1,432
Investing activities
Purchases of equity securities		(186)	(45)
Proceeds from sales of equity securities		259	87
Purchases of available-for-sale securities		(148)	(152)
Proceeds from sales of available-for-sale securities		46	307
Proceeds from repayments of available-for-sale securities		392	477
Proceeds from repayments of held-to-maturity securities		100	15
Purchases of finance receivables and loans held-for-investment		(1,056)	(818)
Proceeds from sales of finance receivables and loans initially held-for-investment		1,060	4
Originations and repayments of finance receivables and loans held-for-investment and other, net		899	(103)
Purchases of operating lease assets		(709)	(741)
Disposals of operating lease assets		889	706
Proceeds from sale of a business unit, net		1,949	0
Net change in nonmarketable equity investments		141	(2)
Other, net		(135)	(117)
Net cash provided by (used in) investing activities		3,501	(382)
Financing activities
Net change in short-term borrowings		(3,297)	(944)
Net increase in deposits		389	1,715
Proceeds from issuance of long-term debt		123	3,129
Repayments of long-term debt		(699)	(426)
Repurchases of common stock		(29)	(27)
Common stock dividends paid		(97)	(96)
Preferred stock dividends paid		(28)	(28)
Net cash (used in) provided by financing activities		(3,638)	3,323
Effect of exchange-rate changes on cash and cash equivalents and restricted cash		(3)	0
Net increase in cash and cash equivalents and restricted cash		1,201	4,373
Cash and cash equivalents and restricted cash at beginning of year		7,439	6,222
Cash and cash equivalents and restricted cash at March 31,		8,640	10,595
Cash paid (received) for
Interest		1,641	1,085
Income taxes		7	(150)
Noncash items
Held-to-maturity securities received in consideration for loans sold		56	0
Loans held-for-sale transferred to finance receivables and loans held-for-investment		1	75
Finance receivables and loans held-for-investment transferred to loans held-for-sale		1,153	0
Additional Cash Flow Elements and Supplemental Cash Flow Information [Abstract]
Cash and cash equivalents on the Condensed Consolidated Balance Sheet		8,153	9,780
Restricted cash included in other assets on the Consolidated Balance Sheet	[1]	487	815
Total cash and cash equivalents and restricted cash in the Condensed Consolidated Statement of Cash Flows		$ 8,640	$ 10,595

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