Debt - Schedule of Credit Facilities (Details) (USD $)	6 Months Ended		12 Months Ended
	Jun. 30, 2014		Dec. 31, 2013
Line Of Credit Facility [Line Items]
Utilized Balance	$ 7,762,950,000	[1]	$ 8,099,773,000
Committed Amount	15,707,974,000		15,273,673,000
Assets Pledged	5,788,302,000		4,490,044,000
Restricted Cash Pledged	103,287,000		89,118,000
Line of Credit Warehouse Facility One
Line Of Credit Facility [Line Items]
Maturity Date	2014-07	[2]	2014-06
Utilized Balance	109,461,000	[2]	483,738,000
Committed Amount	500,000,000	[2]	500,000,000
Effective Rate	2.05%	[2]	0.82%
Assets Pledged	158,591,000	[2]	757,352,000
Restricted Cash Pledged	172,000	[2]	0
Line of Credit Warehouse Facility Two
Line Of Credit Facility [Line Items]
Maturity Date	Various (b)	[3]	Various
Utilized Balance	552,268,000		159,300,000
Committed Amount	1,235,038,000		1,219,474,000
Effective Rate	1.14%		3.62%
Assets Pledged	816,330,000		232,015,000
Restricted Cash Pledged	25,768,000		3,667,000
Line of Credit Warehouse Facility Three
Line Of Credit Facility [Line Items]
Maturity Date	2016-01	[4]	2015-04
Utilized Balance	1,318,088,000	[4]	613,600,000
Committed Amount	4,550,000,000	[4]	4,550,000,000
Effective Rate	1.15%	[4]	2.12%
Assets Pledged	1,756,086,000	[4]	745,759,000
Restricted Cash Pledged	35,685,000	[4]	15,184,000
Line of Credit Warehouse Facility Four
Line Of Credit Facility [Line Items]
Maturity Date	2015-12		2015-06
Utilized Balance	464,037,000		1,360,070,000
Committed Amount	2,000,000,000		2,000,000,000
Effective Rate	2.18%		0.96%
Assets Pledged	570,306,000		1,672,082,000
Restricted Cash Pledged	11,993,000		42,510,000
Line of Credit Warehouse Facility Five
Line Of Credit Facility [Line Items]
Maturity Date	2015-07		2015-07
Utilized Balance	153,515,000		495,786,000
Committed Amount	500,000,000		500,000,000
Effective Rate	1.64%		0.85%
Assets Pledged	191,391,000		598,754,000
Restricted Cash Pledged	7,532,000		25,056,000
Line of Credit Warehouse Facility Six
Line Of Credit Facility [Line Items]
Maturity Date	2015-09	[5]	2015-09
Utilized Balance	196,880,000	[5]	73,080,000
Committed Amount	200,000,000	[5]	200,000,000
Effective Rate	1.97%	[5]	2.84%
Assets Pledged	290,043,000	[5]	76,807,000
Restricted Cash Pledged	12,054,000	[5]	2,701,000
Repurchase Facilities
Line Of Credit Facility [Line Items]
Maturity Date	Various	[6]	Various
Utilized Balance	747,342,000	[6]	879,199,000
Committed Amount	747,342,000	[6]	879,199,000
Effective Rate	1.52%	[6]	1.59%
Assets Pledged	844,305,000	[6]	0
Restricted Cash Pledged	0	[6]	0
Line of Credit Warehouse Facility Seven
Line Of Credit Facility [Line Items]
Maturity Date	2015-12		2015-12
Utilized Balance	495,765,000		210,000,000
Committed Amount	750,000,000		750,000,000
Effective Rate	0.91%		1.84%
Assets Pledged	675,143,000		302,632,000
Restricted Cash Pledged	10,083,000		0
Line of Credit Warehouse Facility Eight
Line Of Credit Facility [Line Items]
Maturity Date	2016-11	[7]	2016-11
Utilized Balance	175,000,000	[7]	175,000,000
Committed Amount	175,000,000	[7]	175,000,000
Effective Rate	1.71%	[7]	1.72%
Assets Pledged	0	[7]
Restricted Cash Pledged	0	[7]	0
Line of Credit Warehouse Facility Nine
Line Of Credit Facility [Line Items]
Maturity Date	2015-03	[8]
Utilized Balance	250,594,000	[8]
Committed Amount	250,594,000	[8]
Effective Rate	0.99%	[8]
Assets Pledged	296,929,000	[8]
Restricted Cash Pledged	0	[8]
Total Facilities with Third Parties
Line Of Credit Facility [Line Items]
Utilized Balance	4,462,950,000		4,449,773,000
Committed Amount	10,907,974,000		10,773,673,000
Assets Pledged	5,599,124,000		4,385,401,000
Restricted Cash Pledged	103,287,000		89,118,000
Line of Credit Facility One
Line Of Credit Facility [Line Items]
Maturity Date	2016-12	[9]	2016-12
Utilized Balance	500,000,000	[9]	500,000,000
Committed Amount	500,000,000	[9]	500,000,000
Effective Rate	2.45%	[9]	2.48%
Assets Pledged	1,623,000	[9]	10,674,000
Restricted Cash Pledged	0	[9]	0
Line of Credit Facility Two
Line Of Credit Facility [Line Items]
Maturity Date	2018-12	[9]	2018-12
Utilized Balance	0	[9]
Committed Amount	500,000,000	[9]	500,000,000
Effective Rate	0.25%	[9]	3.10%
Assets Pledged	0	[9]	0
Restricted Cash Pledged	0	[9]	0
Line Of Credit Facility Three
Line Of Credit Facility [Line Items]
Maturity Date	2016-12	[9]	2016-12
Utilized Balance	1,750,000,000	[9]	1,750,000,000
Committed Amount	1,750,000,000	[9]	1,750,000,000
Effective Rate	2.26%	[9]	2.09%
Assets Pledged	0	[9]	0
Restricted Cash Pledged	0	[9]	0
Line Of Credit Facility Four
Line Of Credit Facility [Line Items]
Maturity Date	2018-12	[9]	2018-12
Utilized Balance	750,000,000	[9]	1,400,000,000
Committed Amount	1,750,000,000	[9]	1,750,000,000
Effective Rate	2.59%	[9]	2.58%
Assets Pledged	187,555,000	[9]	93,969,000
Restricted Cash Pledged	0	[9]	0
Line of Credit Facility Five
Line Of Credit Facility [Line Items]
Maturity Date	2017-03	[9]
Utilized Balance	300,000,000	[9]
Committed Amount	300,000,000	[9]
Effective Rate	1.70%	[9]
Assets Pledged	0	[9]
Restricted Cash Pledged	0	[9]
Total Facilities with Santander and Related Subsidiaries
Line Of Credit Facility [Line Items]
Utilized Balance	3,300,000,000	[9]	3,650,000,000
Committed Amount	4,800,000,000	[9]	4,500,000,000	[7],[8]
Assets Pledged	189,178,000	[9]	104,643,000
Restricted Cash Pledged	$ 0	[9]	$ 0

[1] Notes payable — credit facilities — The carrying amount of notes payable related to revolving credit facilities is estimated to approximate fair value as of June 30, 2014 and December 31, 2013. Management believes that the terms of these credit agreements approximate market terms for similar credit agreements. The fair value of notes payable is considered a Level 3 measurement.

[2] In July 2014, the maturity date of this facility was extended to June 2015.

[3] Half of the outstanding balance on this facility matures in March 2015 and half in March 2016.

[4] This line is held exclusively for Chrysler Capital retail loan and lease financing, with lease financing comprising no more than 50% of the outstanding balance upon advance. In July 2014, the committed amount was reduced to $4.3 billion and the maturity date was extended to June 2016.

[5] This line is held exclusively for unsecured consumer term loans.

[6] The repurchase facility is also collateralized by securitization notes payable retained by the Company. No portion of this facility is unsecured. This facility has rolling 30-day and 90-day maturities.

[7] This line is collateralized by residuals retained by the Company.

[8] This line is collateralized by securitization notes payable retained by the Company.

[9] These lines are also collateralized by securitization notes payable and residuals retained by the Company. As of June 30, 2014 and December 31, 2013, $1,569,930 and $1,123,354, respectively, of the aggregate outstanding balances on these facilities were unsecured.