Finance Receivables and Loans, Net (Financing Receivable Gross Charge-Offs) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Financing Receivable, Credit Quality Indicator [Line Items]
2023			$ 102
2022			752
2021			515
2020			152
2019			166
2018 and prior			97
Revolving loans			116
Revolving loans converted to term			7
Total	$ 677	$ 447	1,907	$ 1,079
Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
2023			102
2022			752
2021			515
2020			152
2019			109
2018 and prior			97
Revolving loans			111
Revolving loans converted to term			7
Total			1,845
Consumer | Automotive
Financing Receivable, Credit Quality Indicator [Line Items]
2023			97
2022			693
2021			492
2020			149
2019			109
2018 and prior			94
Revolving loans			0
Revolving loans converted to term			0
Total	602	381	1,634	934
Consumer | Consumer mortgage
Financing Receivable, Credit Quality Indicator [Line Items]
2023			0
2022			0
2021			0
2020			0
2019			0
2018 and prior			3
Revolving loans			0
Revolving loans converted to term			0
Total	0	1	3	3
Consumer | Mortgage Finance
Financing Receivable, Credit Quality Indicator [Line Items]
2023			0
2022			0
2021			0
2020			0
2019			0
2018 and prior			1
Revolving loans			0
Revolving loans converted to term			0
Total			1
Consumer | Mortgage — Legacy
Financing Receivable, Credit Quality Indicator [Line Items]
2023			0
2022			0
2021			0
2020			0
2019			0
2018 and prior			2
Revolving loans			0
Revolving loans converted to term			0
Total			2
Consumer | Other
Financing Receivable, Credit Quality Indicator [Line Items]
2023			5
2022			59
2021			23
2020			3
2019			0
2018 and prior			0
Revolving loans			111
Revolving loans converted to term			7
Total	74	33	208	84
Consumer | Personal Lending
Financing Receivable, Credit Quality Indicator [Line Items]
2023			5
2022			59
2021			23
2020			3
2019			0
2018 and prior			0
Revolving loans			0
Revolving loans converted to term			0
Total			90
Consumer | Credit Card
Financing Receivable, Credit Quality Indicator [Line Items]
2023			0
2022			0
2021			0
2020			0
2019			0
2018 and prior			0
Revolving loans			111
Revolving loans converted to term			7
Total			118
Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
2023			0
2022			0
2021			0
2020			0
2019			57
2018 and prior			0
Revolving loans			5
Revolving loans converted to term			0
Total	$ 1	$ 32	62	$ 58
Commercial | Automotive
Financing Receivable, Credit Quality Indicator [Line Items]
2023			0
2022			0
2021			0
2020			0
2019			0
2018 and prior			0
Revolving loans			5
Revolving loans converted to term			0
Total			5
Commercial | Other
Financing Receivable, Credit Quality Indicator [Line Items]
2023			0
2022			0
2021			0
2020			0
2019			57
2018 and prior			0
Revolving loans			0
Revolving loans converted to term			0
Total			$ 57