Consolidated Statement of Income - USD ($) shares in Thousands, $ in Millions		12 Months Ended
		Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Financing revenue and other interest income
Interest and fees on finance receivables and loans		$ 11,020	$ 8,099	$ 6,468
Interest on loans held-for-sale		34	31	18
Interest and dividends on investment securities and other earning assets		1,022	841	600
Interest on cash and cash equivalents		332	54	15
Operating leases		1,550	1,596	1,550
Total financing revenue and other interest income		13,958	10,621	8,651
Interest expense
Interest on deposits		5,819	1,987	1,045
Interest on short-term borrowings		73	107	1
Interest on long-term debt		1,001	763	860
Interest on other		4	0	8
Total interest expense		6,897	2,857	1,914
Net depreciation expense on operating lease assets		860	914	570
Net financing revenue and other interest income		6,201	6,850	6,167
Other revenue
Insurance premiums and service revenue earned		1,271	1,151	1,117
Gain on mortgage and automotive loans, net		16	52	87
Loss on extinguishment of debt		0	0	(136)
Other gain (loss) on investments, net		144	(120)	285
Other income, net of losses		582	495	686
Total other revenue		2,013	1,578	2,039
Total net revenue		8,214	8,428	8,206
Provision for credit losses		1,968	1,399	241
Noninterest expense
Compensation and benefits expense		1,901	1,900	1,643
Insurance losses and loss adjustment expenses		422	280	261
Goodwill impairment		149	0	0
Other operating expenses		2,691	2,507	2,206
Total noninterest expense		5,163	4,687	4,110
Income (loss) from continuing operations before income tax expense		1,083	2,342	3,855
Income tax expense from continuing operations		61	627	790
Net income from continuing operations	[1]	1,022	1,715	3,065
Loss from discontinued operations, net of tax		(2)	(1)	(5)
Net income		1,020	1,714	3,060
Net income from continuing operations attributable to common stockholders	[1]	912	1,605	3,008
Loss from discontinued operations, net of tax	[1]	(2)	(1)	(5)
Net income attributable to common stockholders	[1]	$ 910	$ 1,604	$ 3,003
Basic weighted-average common shares outstanding (in shares)	[1],[2]	303,751	316,690	362,583
Diluted weighted-average common shares outstanding (in shares)	[1],[2]	305,135	318,629	365,180
Basic earnings per common share
Net income from continuing operations (in dollars per share)	[1]	$ 3.00	$ 5.07	$ 8.30
Loss from discontinued operations, net of tax (in dollars per share)	[1]	(0.01)	0	(0.01)
Net income (in dollars per share)	[1]	3.00	5.06	8.28
Diluted earnings per common share
Net income from continuing operations (in dollars per share)	[1]	2.99	5.04	8.24
Loss from discontinued operations, net of tax (in dollars per share)	[1]	(0.01)	0	(0.01)
Net income (in dollars per share)	[1]	2.98	5.03	8.22
Cash dividends declared per common share (in dollars per share)	[1]	$ 1.20	$ 1.20	$ 0.88

[1] Figures in the table may not recalculate exactly due to rounding. Earnings per share is calculated based on unrounded numbers.

[2] Includes shares related to share-based compensation that vested but were not yet issued.