LOANS AND ALLOWANCE FOR CREDIT LOSSES (Narrative) (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2020		Jun. 30, 2020		Jun. 30, 2019	Mar. 31, 2020	Jan. 01, 2020	Dec. 31, 2019		Mar. 31, 2019	Dec. 31, 2018
Loans Receivable [Line Items]
Loans pledged as collateral		$ 56,100,000		$ 56,100,000					$ 53,900,000
LHFS	[1]	5,439,364		5,439,364					1,420,223
LHFS		241,300		241,300					289,000
Accrued interest receivable		711,900		711,900					545,148
Financing receivable, allowance for credit loss, period increase (decrease)		489,000		3,500,000
Financing receivable, allowance for credit loss		7,112,739	[2]	7,112,739	[2]	$ 3,783,833	$ 6,623,736		3,646,189	[2]	$ 3,843,095	$ 3,897,130
Financing receivable, allowance for credit loss, increase for business drivers				$ 542,000
Percentage of payment needed on past due loans for qualification				90.00%
TDRs, number of days past due after modification considered to have subsequently defaulted				90 days
Subsidiaries
Loans Receivable [Line Items]
LHFS		2,600,000		$ 2,600,000
SC | Chrysler Capital Loans
Loans Receivable [Line Items]
Loans purchased/originated				$ 7,300,000		$ 5,900,000
SC | Chrysler Capital Loans | Accounts Receivable | Credit Concentration Risk
Loans Receivable [Line Items]
Percentage of loan origination				62.00%		54.00%
Loans receivable
Loans Receivable [Line Items]
Accrued interest receivable		711,900		$ 711,900					497,700
Retail installment contracts
Loans Receivable [Line Items]
TDRs, number of days past due after modification considered to have subsequently defaulted				120 days
Consumer
Loans Receivable [Line Items]
Financing receivable, allowance for credit loss		6,031,617		$ 6,031,617		$ 3,290,007	$ 5,712,273		3,199,612		$ 3,348,356	$ 3,409,021
Consumer | Subsidiaries
Loans Receivable [Line Items]
LHFS		998,600		998,600
Consumer | Personal unsecured loans
Loans Receivable [Line Items]
LHFS		1,000,000		1,000,000					$ 1,000,000
Consumer | Retail installment contracts | Subsidiaries
Loans Receivable [Line Items]
LHFS		$ 1,600,000		1,600,000
COVID-19
Loans Receivable [Line Items]
Financing receivable, allowance for credit loss, reserves				$ 651,000
ASU 2016-13
Loans Receivable [Line Items]
Financing receivable, allowance for credit loss								$ 2,500,000

[1] Includes $241.3 million and $289.0 million of loans recorded at the FVO at June 30, 2020 and December 31, 2019, respectively.

[2] The Company has interests in certain Trusts that are considered VIEs for accounting purposes. At June 30, 2020 and December 31, 2019, LHFI included $22.5 billion and $26.5 billion, Operating leases assets, net included $16.2 billion and $16.5 billion, restricted cash included $1.6 billion and $1.6 billion, other assets included $703.2 million and $625.4 million, Borrowings and other debt obligations included $32.3 billion and $34.2 billion, and Other liabilities included $101.1 million and $188.1 million of assets or liabilities that were included within VIEs, respectively. See Note 7 to these Condensed Consolidated Financial Statements for additional information.