Finance Receivables - Credit Quality and Impaired Receivables (Details) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivables	$ 113,705,000,000	$ 101,358,000,000
Finance receivables before unearned interest supplements	7,793,000,000	6,765,000,000
Related Party Transaction, Expenses from Transactions with Related Party	(408,000,000)	(307,000,000)
Finance receivables, net	7,347,000,000	6,423,000,000
Sales-type Lease, Interest Income, Unguaranteed Residual Asset	2,910,000,000	2,389,000,000
Deferred Costs, Leasing, Gross	96,000,000	79,000,000
Sales-Type and Direct Financing Lease, Gross	4,787,000,000	4,297,000,000
Sales Type and Direct Financing Lease Revenue	$ 381,000,000	303,000,000	$ 345,000,000
Non-Accrual of Revenue	90
Finance Leases Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Allowance for Credit Loss	$ (38,000,000)	(35,000,000)
Wholesale and Dealer Loans [Member] | Financing Receivable [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivables	33,000,000	9,000,000
Consumer Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivables	78,392,000,000	71,503,000,000
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	947,000,000	942,000,000
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	2,424,000,000	2,640,000,000
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	7,562,000,000	6,265,000,000
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	11,497,000,000	14,091,000,000
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	20,536,000,000	18,579,000,000
Financing Receivable, Year One, Originated, Current Fiscal Year	$ 35,426,000,000	28,986,000,000
Financing Receivable, Credit Quality, Range of Dates Ratings Updated	to 120 days
Consumer Segment [Member] | Percent of Total
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivables	$ 1.000	1.000
Consumer Segment [Member] | 31-60 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivables	690,000,000	649,000,000
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	40,000,000	41,000,000
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	49,000,000	60,000,000
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	130,000,000	91,000,000
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	125,000,000	181,000,000
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	187,000,000	150,000,000
Financing Receivable, Year One, Originated, Current Fiscal Year	159,000,000	126,000,000
Consumer Segment [Member] | 31-60 Days Past Due [Member] | Percent of Total
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivables	0.009	0.009
Consumer Segment [Member] | Financing Receivables, 61-120 Days past due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivables	195,000,000	149,000,000
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	9,000,000	9,000,000
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	11,000,000	12,000,000
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	30,000,000	20,000,000
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	37,000,000	39,000,000
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	58,000,000	40,000,000
Financing Receivable, Year One, Originated, Current Fiscal Year	50,000,000	29,000,000
Consumer Segment [Member] | Financing Receivables, 61-120 Days past due [Member] | Percent of Total
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivables	0.002	0.002
Consumer Segment [Member] | Greater Than 120 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivables	43,000,000	38,000,000
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	7,000,000	9,000,000
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	4,000,000	4,000,000
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	7,000,000	5,000,000
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	10,000,000	7,000,000
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	10,000,000	7,000,000
Financing Receivable, Year One, Originated, Current Fiscal Year	5,000,000	6,000,000
Consumer Segment [Member] | Greater Than 120 Days Past Due [Member] | Percent of Total
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivables	0.001	0.001
Consumer Segment [Member] | Total past due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivables	928,000,000	836,000,000
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	56,000,000	59,000,000
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	64,000,000	76,000,000
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	167,000,000	116,000,000
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	172,000,000	227,000,000
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	255,000,000	197,000,000
Financing Receivable, Year One, Originated, Current Fiscal Year	214,000,000	161,000,000
Consumer Segment [Member] | Total past due [Member] | Percent of Total
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivables	0.012	0.012
Consumer Segment [Member] | Financial Asset, 1 to 29 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivables	77,464,000,000	70,667,000,000
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	891,000,000	883,000,000
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	2,360,000,000	2,564,000,000
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	7,395,000,000	6,149,000,000
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	11,325,000,000	13,864,000,000
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	20,281,000,000	18,382,000,000
Financing Receivable, Year One, Originated, Current Fiscal Year	35,212,000,000	28,825,000,000
Consumer Segment [Member] | Financial Asset, 1 to 29 Days Past Due [Member] | Percent of Total
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivables	$ 0.988	0.988
Consumer Segment [Member] | Pass [Member] | Maximum [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Finance Receivables Credit Quality Ratings Term Range	60 days
Consumer Segment [Member] | Substandard [Member] | Minimum [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Finance Receivables Credit Quality Ratings Term Range	120 days
Non-Consumer Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivables	$ 35,313,000,000	29,855,000,000
Financing Receivable, Revolving	32,262,000,000	27,261,000,000
Non-Consumer Segment [Member] | Group I [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivables	30,132,000,000	25,303,000,000
Financing Receivable, Revolving	29,095,000,000	24,242,000,000
Non-Consumer Segment [Member] | Group I [Member] | Percent of Total
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivables	0.903	0.891
Non-Consumer Segment [Member] | Group II [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivables	2,900,000,000	2,823,000,000
Financing Receivable, Revolving	2,834,000,000	2,751,000,000
Non-Consumer Segment [Member] | Group II [Member] | Percent of Total
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivables	0.087	0.099
Non-Consumer Segment [Member] | Group III [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivables	301,000,000	243,000,000
Financing Receivable, Revolving	292,000,000	233,000,000
Non-Consumer Segment [Member] | Group III [Member] | Percent of Total
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivables	0.009	0.009
Non-Consumer Segment [Member] | Group IV [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivables	44,000,000	39,000,000
Financing Receivable, Revolving	41,000,000	35,000,000
Non-Consumer Segment [Member] | Group IV [Member] | Percent of Total
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivables	0.001	0.001
Non-Consumer Segment [Member] | Dealer Loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	399,000,000	404,000,000
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	31,000,000	169,000,000
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	59,000,000	36,000,000
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	159,000,000	72,000,000
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	64,000,000	187,000,000
Financing Receivable, Year One, Originated, Current Fiscal Year	403,000,000	279,000,000
Financing Receivable Total	1,115,000,000	1,147,000,000
Non-Consumer Segment [Member] | Dealer Loan | Group I [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	383,000,000	402,000,000
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	30,000,000	148,000,000
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	58,000,000	35,000,000
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	156,000,000	67,000,000
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	61,000,000	185,000,000
Financing Receivable, Year One, Originated, Current Fiscal Year	349,000,000	224,000,000
Financing Receivable Total	1,037,000,000	1,061,000,000
Non-Consumer Segment [Member] | Dealer Loan | Group II [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	16,000,000	2,000,000
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	0	21,000,000
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	1,000,000	0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	3,000,000	5,000,000
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	2,000,000	2,000,000
Financing Receivable, Year One, Originated, Current Fiscal Year	44,000,000	42,000,000
Financing Receivable Total	66,000,000	72,000,000
Non-Consumer Segment [Member] | Dealer Loan | Group III [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	0	0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	0	0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	0	0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	0	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	1,000,000	0
Financing Receivable, Year One, Originated, Current Fiscal Year	8,000,000	10,000,000
Financing Receivable Total	9,000,000	10,000,000
Non-Consumer Segment [Member] | Dealer Loan | Group IV [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	0	0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	1,000,000	0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	0	1,000,000
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	0	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	0	0
Financing Receivable, Year One, Originated, Current Fiscal Year	2,000,000	3,000,000
Financing Receivable Total	3,000,000	4,000,000
Non-Consumer Segment [Member] | Non-Consumer Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivables	33,377,000,000	28,408,000,000
Non-Consumer Segment [Member] | Non-Consumer Segment [Member] | Percent of Total
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivables	1.000	1.000
Non-Consumer Segment [Member] | Wholesale and Dealer Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivables	$ 33,377,000,000	$ 28,408,000,000