Condensed Consolidated Statement of Cash Flows - USD ($) $ in Millions		6 Months Ended
		Jun. 30, 2022	Jun. 30, 2021
Operating activities
Net income		$ 1,137	$ 1,696
Reconciliation of net income to net cash provided by operating activities
Depreciation and amortization		666	640
Provision for credit losses		471	(45)
Gain on mortgage and automotive loans, net		(18)	(55)
Other (loss) gain on investments, net		119	(188)
Loss on extinguishment of debt		0	74
Originations and purchases of loans held-for-sale		(2,484)	(2,154)
Proceeds from sales and repayments of loans held-for-sale		2,277	2,230
Net change in
Deferred income taxes		331	(675)
Interest payable		60	(48)
Other assets		912	2
Other liabilities		(19)	231
Other, net		20	(86)
Net cash provided by operating activities		3,472	1,622
Investing activities
Purchases of equity securities		(499)	(724)
Proceeds from sales of equity securities		720	944
Purchases of available-for-sale securities		(5,495)	(14,376)
Proceeds from sales of available-for-sale securities		716	2,788
Proceeds from repayments of available-for-sale securities		2,675	6,539
Purchases of held-to-maturity securities		(47)	(97)
Proceeds from repayments of held-to-maturity securities		105	223
Purchases of finance receivables and loans held-for-investment		(3,838)	(3,500)
Proceeds from sales of finance receivables and loans initially held-for-investment		3	376
Originations and repayments of finance receivables and loans held-for-investment and other, net		(3,141)	9,095
Purchases of operating lease assets		(1,799)	(3,026)
Disposals of operating lease assets		1,716	1,775
Net change in nonmarketable equity investments		(246)	93
Other, net		(305)	(201)
Net cash used in investing activities		(9,435)	(91)
Financing activities
Net change in short-term borrowings		7,775	(2,136)
Net (decrease) increase in deposits		(1,159)	2,060
Proceeds from issuance of long-term debt		4,216	194
Repayments of long-term debt		(4,292)	(3,800)
Purchases of land and buildings in satisfaction of finance lease liabilities		(44)	0
Repurchases of common stock		(1,184)	(721)
Preferred stock issuance		0	2,326
Trust preferred securities redemption		0	(1,442)
Common stock dividends paid		(203)	(144)
Preferred stock dividends paid		(56)	0
Net cash provided by (used in) financing activities		5,053	(3,663)
Effect of exchange-rate changes on cash and cash equivalents and restricted cash		(1)	3
Net decrease in cash and cash equivalents and restricted cash		(911)	(2,129)
Cash and cash equivalents and restricted cash at beginning of year		5,670	16,574
Cash and cash equivalents and restricted cash at June 30,		4,759	14,445
Cash paid (received) for
Interest		772	1,057
Income taxes		(429)	1,212
Noncash items
Loans held-for-sale transferred to finance receivables and loans held-for-investment		25	5
Additions of property and equipment		0	46
Finance receivables and loans held-for-investment transferred to loans held-for-sale		0	414
Additional Cash Flow Elements and Supplemental Cash Flow Information [Abstract]
Cash and cash equivalents on the Condensed Consolidated Balance Sheet		4,167	13,664
Restricted cash included in other assets on the Consolidated Balance Sheet	[1]	592	781
Total cash and cash equivalents and restricted cash in the Condensed Consolidated Statement of Cash Flows		$ 4,759	$ 14,445

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