Condensed Consolidated Statement of Cash Flows (unaudited) - USD ($) $ in Millions		6 Months Ended
		Jun. 30, 2024	Jun. 30, 2023
Operating activities
Net income		$ 451	$ 648
Reconciliation of net income to net cash provided by operating activities
Depreciation and amortization		616	613
Provision for credit losses		964	873
Gain on mortgage and automotive loans, net		(12)	(9)
Other gain on investments, net		(22)	(100)
Originations and purchases of loans held-for-sale		(1,074)	(1,327)
Proceeds from sales and repayments of loans held-for-sale		1,311	1,660
Net change in
Deferred income taxes		(44)	53
Interest payable		290	547
Other assets		184	30
Other liabilities		115	(42)
Other, net		137	74
Net cash provided by operating activities		2,916	3,020
Investing activities
Purchases of equity securities		(457)	(102)
Proceeds from sales of equity securities		459	127
Purchases of available-for-sale securities		(246)	(285)
Proceeds from sales of available-for-sale securities		63	333
Proceeds from repayments of available-for-sale securities		898	1,024
Proceeds from repayments of held-to-maturity securities		229	32
Purchases of finance receivables and loans held-for-investment		(1,718)	(2,035)
Proceeds from sales of finance receivables and loans initially held-for-investment		1,067	9
Originations and repayments of finance receivables and loans held-for-investment and other, net		47	(1,368)
Purchases of operating lease assets		(1,609)	(1,501)
Disposals of operating lease assets		1,968	1,580
Proceeds from sale of a business unit, net		1,956	0
Net change in nonmarketable equity investments		77	(39)
Other, net		(340)	(255)
Net cash provided by (used in) investing activities		2,394	(2,480)
Financing activities
Net change in short-term borrowings		(175)	(205)
Net (decrease) increase in deposits		(2,545)	2,003
Proceeds from issuance of long-term debt		549	4,051
Repayments of long-term debt		(2,175)	(1,704)
Repurchases of common stock		(30)	(29)
Common stock dividends paid		(188)	(187)
Preferred stock dividends paid		(56)	(56)
Net cash (used in) provided by financing activities		(4,620)	3,873
Effect of exchange-rate changes on cash and cash equivalents and restricted cash		(5)	3
Net increase in cash and cash equivalents and restricted cash		685	4,416
Cash and cash equivalents and restricted cash at beginning of year		7,439	6,222
Cash and cash equivalents and restricted cash at June 30,		8,124	10,638
Cash paid (received) for
Interest		3,455	2,548
Income taxes		45	(71)
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		18	208
Finance receivables and loans held-for-investment transferred to loans held-for-sale		1,390	0
Additional Cash Flow Elements and Supplemental Cash Flow Information [Abstract]
Cash and cash equivalents on the Condensed Consolidated Balance Sheet		7,369	9,972
Restricted cash and cash equivalents and restricted cash held for securitization trusts included in other assets on the Condensed Consolidated Balance Sheet	[1]	755	666
Total cash and cash equivalents and restricted cash in the Condensed Consolidated Statement of Cash Flows		$ 8,124	$ 10,638

[1] Refer to Note 11 for additional details describing the nature of restricted cash and cash equivalent balances.