Finance Receivables and Loans, Net (Financing Receivable Credit Quality Indicators Consumer) (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Financing Receivable, Credit Quality Indicator [Line Items]
Total finance receivables and loans	$ 135,748	$ 122,268
Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
Total finance receivables and loans	106,610	98,226
Consumer | Excludes fair value option elected other loans
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, originated, current fiscal year	40,946	46,869
Year two, originated, fiscal year before current fiscal year	34,750	20,088
Year three, originated, two years before current fiscal year	12,893	13,015
Year four, originated, three years before current fiscal year	7,698	7,800
Year five, originated, four years before current fiscal year	4,071	4,661
Originated, more than five years before current fiscal year	4,994	4,562
Revolving loans	1,794	1,197
Revolving loans converted to term	21	27
Total finance receivables and loans	107,167	98,219
Consumer | Consumer automotive, excludes basis adjustment
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, originated, current fiscal year	37,114
Year two, originated, fiscal year before current fiscal year	23,415
Year three, originated, two years before current fiscal year	10,893
Year four, originated, three years before current fiscal year	6,872
Year five, originated, four years before current fiscal year	3,480
Originated, more than five years before current fiscal year	2,072
Revolving loans	0
Revolving loans converted to term	0
Total finance receivables and loans	83,846
Basis adjustment for active hedge	560
Consumer | Automotive
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, originated, current fiscal year		35,802
Year two, originated, fiscal year before current fiscal year		17,736
Year three, originated, two years before current fiscal year		12,010
Year four, originated, three years before current fiscal year		7,028
Year five, originated, four years before current fiscal year		3,610
Originated, more than five years before current fiscal year		2,066
Revolving loans		0
Revolving loans converted to term		0
Total finance receivables and loans	83,286	78,252
Consumer | Consumer mortgage
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, originated, current fiscal year	2,309	10,227
Year two, originated, fiscal year before current fiscal year	10,927	2,215
Year three, originated, two years before current fiscal year	1,950	986
Year four, originated, three years before current fiscal year	821	767
Year five, originated, four years before current fiscal year	590	1,050
Originated, more than five years before current fiscal year	2,922	2,496
Revolving loans	195	244
Revolving loans converted to term	21	27
Total finance receivables and loans	19,735	18,012
Consumer | Mortgage Finance
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, originated, current fiscal year	2,309	10,227
Year two, originated, fiscal year before current fiscal year	10,927	2,215
Year three, originated, two years before current fiscal year	1,950	986
Year four, originated, three years before current fiscal year	821	767
Year five, originated, four years before current fiscal year	590	1,050
Originated, more than five years before current fiscal year	2,848	2,399
Revolving loans	0	0
Revolving loans converted to term	0	0
Total finance receivables and loans	19,445	17,644
Consumer | Mortgage - Legacy
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, originated, current fiscal year	0	0
Year two, originated, fiscal year before current fiscal year	0	0
Year three, originated, two years before current fiscal year	0	0
Year four, originated, three years before current fiscal year	0	0
Year five, originated, four years before current fiscal year	0	0
Originated, more than five years before current fiscal year	74	97
Revolving loans	195	244
Revolving loans converted to term	21	27
Total finance receivables and loans	290	368
Consumer | Other
Financing Receivable, Credit Quality Indicator [Line Items]
Total finance receivables and loans	3,589	1,962
Fair value, option, carrying amount, financing receivable	3	7
Consumer | Other | Excludes fair value option elected other loans
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, originated, current fiscal year	1,523	840
Year two, originated, fiscal year before current fiscal year	408	137
Year three, originated, two years before current fiscal year	50	19
Year four, originated, three years before current fiscal year	5	5
Year five, originated, four years before current fiscal year	1	1
Originated, more than five years before current fiscal year	0	0
Revolving loans	1,599	953
Revolving loans converted to term	0	0
Total finance receivables and loans	3,586	1,955
Consumer | Personal Lending
Financing Receivable, Credit Quality Indicator [Line Items]
Total finance receivables and loans	1,990	1,009
Consumer | Personal Lending | Excludes fair value option elected other loans
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, originated, current fiscal year	1,523	840
Year two, originated, fiscal year before current fiscal year	408	137
Year three, originated, two years before current fiscal year	50	19
Year four, originated, three years before current fiscal year	5	5
Year five, originated, four years before current fiscal year	1	1
Originated, more than five years before current fiscal year	0	0
Revolving loans	0	0
Revolving loans converted to term	0	0
Total finance receivables and loans	1,987	1,002
Consumer | Credit card receivables
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, originated, current fiscal year	0	0
Year two, originated, fiscal year before current fiscal year	0	0
Year three, originated, two years before current fiscal year	0	0
Year four, originated, three years before current fiscal year	0	0
Year five, originated, four years before current fiscal year	0	0
Originated, more than five years before current fiscal year	0	0
Revolving loans	1,599	953
Revolving loans converted to term	0	0
Total finance receivables and loans	1,599	953
Current | Consumer | Consumer automotive, excludes basis adjustment
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, originated, current fiscal year	36,127
Year two, originated, fiscal year before current fiscal year	22,102
Year three, originated, two years before current fiscal year	10,341
Year four, originated, three years before current fiscal year	6,451
Year five, originated, four years before current fiscal year	3,237
Originated, more than five years before current fiscal year	1,890
Revolving loans	0
Revolving loans converted to term	0
Total finance receivables and loans	80,148
Current | Consumer | Automotive
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, originated, current fiscal year		35,222
Year two, originated, fiscal year before current fiscal year		17,218
Year three, originated, two years before current fiscal year		11,512
Year four, originated, three years before current fiscal year		6,692
Year five, originated, four years before current fiscal year		3,403
Originated, more than five years before current fiscal year		1,911
Revolving loans		0
Revolving loans converted to term		0
Total finance receivables and loans		75,958
Current | Consumer | Mortgage Finance
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, originated, current fiscal year	2,292	10,169
Year two, originated, fiscal year before current fiscal year	10,893	2,212
Year three, originated, two years before current fiscal year	1,946	977
Year four, originated, three years before current fiscal year	815	744
Year five, originated, four years before current fiscal year	577	1,041
Originated, more than five years before current fiscal year	2,805	2,363
Revolving loans	0	0
Revolving loans converted to term	0	0
Total finance receivables and loans	19,328	17,506
Current | Consumer | Mortgage - Legacy
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, originated, current fiscal year	0	0
Year two, originated, fiscal year before current fiscal year	0	0
Year three, originated, two years before current fiscal year	0	0
Year four, originated, three years before current fiscal year	0	0
Year five, originated, four years before current fiscal year	0	0
Originated, more than five years before current fiscal year	62	79
Revolving loans	191	238
Revolving loans converted to term	18	23
Total finance receivables and loans	271	340
Current | Consumer | Personal Lending | Excludes fair value option elected other loans
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, originated, current fiscal year	1,492	821
Year two, originated, fiscal year before current fiscal year	392	133
Year three, originated, two years before current fiscal year	48	18
Year four, originated, three years before current fiscal year	5	5
Year five, originated, four years before current fiscal year	1	1
Originated, more than five years before current fiscal year	0	0
Revolving loans	0	0
Revolving loans converted to term	0	0
Total finance receivables and loans	1,938	978
Current | Consumer | Credit card receivables
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, originated, current fiscal year	0	0
Year two, originated, fiscal year before current fiscal year	0	0
Year three, originated, two years before current fiscal year	0	0
Year four, originated, three years before current fiscal year	0	0
Year five, originated, four years before current fiscal year	0	0
Originated, more than five years before current fiscal year	0	0
Revolving loans	1,518	932
Revolving loans converted to term	0	0
Total finance receivables and loans	1,518	932
Financing receivables, 30 to 59 days past due | Consumer | Consumer automotive, excludes basis adjustment
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, originated, current fiscal year	707
Year two, originated, fiscal year before current fiscal year	878
Year three, originated, two years before current fiscal year	370
Year four, originated, three years before current fiscal year	284
Year five, originated, four years before current fiscal year	165
Originated, more than five years before current fiscal year	120
Revolving loans	0
Revolving loans converted to term	0
Total finance receivables and loans	2,524
Financing receivables, 30 to 59 days past due | Consumer | Automotive
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, originated, current fiscal year		424
Year two, originated, fiscal year before current fiscal year		353
Year three, originated, two years before current fiscal year		334
Year four, originated, three years before current fiscal year		226
Year five, originated, four years before current fiscal year		139
Originated, more than five years before current fiscal year		101
Revolving loans		0
Revolving loans converted to term		0
Total finance receivables and loans		1,577
Financing receivables, 30 to 59 days past due | Consumer | Mortgage Finance
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, originated, current fiscal year	15	50
Year two, originated, fiscal year before current fiscal year	29	3
Year three, originated, two years before current fiscal year	4	3
Year four, originated, three years before current fiscal year	3	7
Year five, originated, four years before current fiscal year	4	2
Originated, more than five years before current fiscal year	26	12
Revolving loans	0	0
Revolving loans converted to term	0	0
Total finance receivables and loans	81	77
Financing receivables, 30 to 59 days past due | Consumer | Mortgage - Legacy
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, originated, current fiscal year	0	0
Year two, originated, fiscal year before current fiscal year	0	0
Year three, originated, two years before current fiscal year	0	0
Year four, originated, three years before current fiscal year	0	0
Year five, originated, four years before current fiscal year	0	0
Originated, more than five years before current fiscal year	4	2
Revolving loans	1	1
Revolving loans converted to term	0	0
Total finance receivables and loans	5	3
Financing receivables, 30 to 59 days past due | Consumer | Personal Lending | Excludes fair value option elected other loans
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, originated, current fiscal year	14	9
Year two, originated, fiscal year before current fiscal year	6	2
Year three, originated, two years before current fiscal year	1	0
Year four, originated, three years before current fiscal year	0	0
Year five, originated, four years before current fiscal year	0	0
Originated, more than five years before current fiscal year	0	0
Revolving loans	0	0
Revolving loans converted to term	0	0
Total finance receivables and loans	21	11
Financing receivables, 30 to 59 days past due | Consumer | Credit card receivables
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, originated, current fiscal year	0	0
Year two, originated, fiscal year before current fiscal year	0	0
Year three, originated, two years before current fiscal year	0	0
Year four, originated, three years before current fiscal year	0	0
Year five, originated, four years before current fiscal year	0	0
Originated, more than five years before current fiscal year	0	0
Revolving loans	22	6
Revolving loans converted to term	0	0
Total finance receivables and loans	22	6
Financing receivables, 60 to 89 days past due | Consumer | Consumer automotive, excludes basis adjustment
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, originated, current fiscal year	207
Year two, originated, fiscal year before current fiscal year	324
Year three, originated, two years before current fiscal year	135
Year four, originated, three years before current fiscal year	99
Year five, originated, four years before current fiscal year	55
Originated, more than five years before current fiscal year	38
Revolving loans	0
Revolving loans converted to term	0
Total finance receivables and loans	858
Financing receivables, 60 to 89 days past due | Consumer | Automotive
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, originated, current fiscal year		115
Year two, originated, fiscal year before current fiscal year		114
Year three, originated, two years before current fiscal year		108
Year four, originated, three years before current fiscal year		70
Year five, originated, four years before current fiscal year		41
Originated, more than five years before current fiscal year		28
Revolving loans		0
Revolving loans converted to term		0
Total finance receivables and loans		476
Financing receivables, 60 to 89 days past due | Consumer | Mortgage Finance
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, originated, current fiscal year	2	8
Year two, originated, fiscal year before current fiscal year	4	0
Year three, originated, two years before current fiscal year	0	1
Year four, originated, three years before current fiscal year	1	0
Year five, originated, four years before current fiscal year	1	0
Originated, more than five years before current fiscal year	3	5
Revolving loans	0	0
Revolving loans converted to term	0	0
Total finance receivables and loans	11	14
Financing receivables, 60 to 89 days past due | Consumer | Mortgage - Legacy
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, originated, current fiscal year	0	0
Year two, originated, fiscal year before current fiscal year	0	0
Year three, originated, two years before current fiscal year	0	0
Year four, originated, three years before current fiscal year	0	0
Year five, originated, four years before current fiscal year	0	0
Originated, more than five years before current fiscal year	0	1
Revolving loans	0	0
Revolving loans converted to term	1	1
Total finance receivables and loans	1	2
Financing receivables, 60 to 89 days past due | Consumer | Personal Lending | Excludes fair value option elected other loans
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, originated, current fiscal year	9	6
Year two, originated, fiscal year before current fiscal year	5	1
Year three, originated, two years before current fiscal year	1	1
Year four, originated, three years before current fiscal year	0	0
Year five, originated, four years before current fiscal year	0	0
Originated, more than five years before current fiscal year	0	0
Revolving loans	0	0
Revolving loans converted to term	0	0
Total finance receivables and loans	15	8
Financing receivables, 60 to 89 days past due | Consumer | Credit card receivables
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, originated, current fiscal year	0	0
Year two, originated, fiscal year before current fiscal year	0	0
Year three, originated, two years before current fiscal year	0	0
Year four, originated, three years before current fiscal year	0	0
Year five, originated, four years before current fiscal year	0	0
Originated, more than five years before current fiscal year	0	0
Revolving loans	18	5
Revolving loans converted to term	0	0
Total finance receivables and loans	18	5
Financing receivables, 90 or more days past due | Consumer | Consumer automotive, excludes basis adjustment
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, originated, current fiscal year	73
Year two, originated, fiscal year before current fiscal year	111
Year three, originated, two years before current fiscal year	47
Year four, originated, three years before current fiscal year	38
Year five, originated, four years before current fiscal year	23
Originated, more than five years before current fiscal year	24
Revolving loans	0
Revolving loans converted to term	0
Total finance receivables and loans	316
Financing receivables, 90 or more days past due | Consumer | Automotive
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, originated, current fiscal year		41
Year two, originated, fiscal year before current fiscal year		51
Year three, originated, two years before current fiscal year		56
Year four, originated, three years before current fiscal year		40
Year five, originated, four years before current fiscal year		27
Originated, more than five years before current fiscal year		26
Revolving loans		0
Revolving loans converted to term		0
Total finance receivables and loans		241
Financing receivables, 90 or more days past due | Consumer | Mortgage Finance
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, originated, current fiscal year	0	0
Year two, originated, fiscal year before current fiscal year	1	0
Year three, originated, two years before current fiscal year	0	5
Year four, originated, three years before current fiscal year	2	16
Year five, originated, four years before current fiscal year	8	7
Originated, more than five years before current fiscal year	14	19
Revolving loans	0	0
Revolving loans converted to term	0	0
Total finance receivables and loans	25	47
Financing receivables, 90 or more days past due | Consumer | Mortgage - Legacy
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, originated, current fiscal year	0	0
Year two, originated, fiscal year before current fiscal year	0	0
Year three, originated, two years before current fiscal year	0	0
Year four, originated, three years before current fiscal year	0	0
Year five, originated, four years before current fiscal year	0	0
Originated, more than five years before current fiscal year	8	15
Revolving loans	3	5
Revolving loans converted to term	2	3
Total finance receivables and loans	13	23
Financing receivables, 90 or more days past due | Consumer | Personal Lending | Excludes fair value option elected other loans
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, originated, current fiscal year	8	4
Year two, originated, fiscal year before current fiscal year	5	1
Year three, originated, two years before current fiscal year	0	0
Year four, originated, three years before current fiscal year	0	0
Year five, originated, four years before current fiscal year	0	0
Originated, more than five years before current fiscal year	0	0
Revolving loans	0	0
Revolving loans converted to term	0	0
Total finance receivables and loans	13	5
Financing receivables, 90 or more days past due | Consumer | Credit card receivables
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, originated, current fiscal year	0	0
Year two, originated, fiscal year before current fiscal year	0	0
Year three, originated, two years before current fiscal year	0	0
Year four, originated, three years before current fiscal year	0	0
Year five, originated, four years before current fiscal year	0	0
Originated, more than five years before current fiscal year	0	0
Revolving loans	41	10
Revolving loans converted to term	0	0
Total finance receivables and loans	$ 41	$ 10