| **BORROWINGS**                 | 3 Months Ended                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       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| **Debt Disclosure [Abstract]** |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        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| BORROWINGS                     | BORROWINGSTotal borrowings and other debt obligations at March 31, 2016 was $50.8 billion, compared to $49.1 billion at December 31, 2015. The Company's debt agreements impose certain limitations on dividends, other payments and transactions. The Company is currently in compliance with these limitations. Periodically, as part of the Company's wholesale funding management, it opportunistically repurchases outstanding borrowings in the open market and subsequently retires the obligations. The Company did not repurchase any outstanding borrowings during the three-month period endedMarch 31, 2016 or March 31, 2015. On February 22, 2016, the Company issued $1.5 billion of Senior Unsecured Floating Rate Notes to Santander. The notes have a floating rate equal to three-month LIBOR plus 218 basis points with a maturity of August 22, 2017. The proceeds of the notes will be used for general corporate purposes. The Company has the ability to call these notes at par with no prepayment penalty.During the first quarter of 2016, the Company terminated $1.3 billion of FHLB advances. As a consequence, the Company incurred costs of $32.9 million through the loss on debt extinguishment. On April 18, 2016, the Company terminated $125.0 million in FHLB advances with prepayment fees of $4.8 million. On May 10, 2016, the Company terminated $250.0 million in FHLB advances with prepayment fees of $7.5 million.Parent Company Borrowings and Debt ObligationsThe following table presents information regarding the Parent Company borrowings and other debt obligations at the dates indicated: March 31, 2016 December 31, 2015 Balance EffectiveRate Balance EffectiveRate (dollars in thousands)4.625% senior notes, due April 2016 $475,982 4.85% $475,723 4.85%Senior notes with related party, due August 2017(1)1,500,000 2.80% — —%3.45% senior notes, due August 2018497,999 3.62% 497,800 3.62%2.65% senior notes, due April 2020993,527 2.82% 993,151 2.82%4.50% senior notes, due July 20251,094,599 4.56% 1,094,483 4.56%Junior subordinated debentures - Capital Trust VI, due June 203669,781 7.91% 69,775 7.91%Common securities - Capital Trust VI10,000 7.91% 10,000 7.91%Junior subordinated debentures - Capital Trust IX, due July 2036149,411 2.43% 149,404 2.18%Common securities - Capital Trust IX4,640 2.43% 4,640 2.18%     Total Parent Company borrowings and other debt obligations$4,795,939 3.57% $3,294,976 3.91%(1)  These notes will bear interest at a rate equal to three-month LIBOR plus 218 basis points per annum.NOTE 10. BORROWINGS (continued)Bank Borrowings and Debt ObligationsThe following table presents information regarding the Bank's borrowings and other debt obligations at the dates indicated:  March 31, 2016 December 31, 2015 Balance EffectiveRate Balance EffectiveRate (dollars in thousands)2.00% senior notes, due January 2018$746,818 2.24% $746,381 2.24%Senior notes, due January 2018(1)249,486 1.72% 249,415 1.31%Overnight federal funds purchased100,000 0.35% — —%8.750% subordinated debentures, due May 2018498,346 8.92% 498,175 8.92%Subordinated term loan, due February 2019124,979 6.53% 130,899 6.15%FHLB advances, maturing through July 201912,835,000 1.24% 13,885,000 1.40%REIT preferred, due May 2020155,310 13.48% 154,930 13.66%Subordinated term loan, due August 202230,445 8.28% 30,344 7.89%     Total Bank borrowings and other debt obligations$14,740,384 1.74% $15,695,144 1.85%(1)  These notes will bear interest at a rate equal to three-month LIBOR plus 93 basis points per annum.Revolving Credit FacilitiesThe following tables present information regarding SC's credit facilities as of March 31, 2016 and December 31, 2015: March 31, 2016 Balance EffectiveRate Assets Pledged Restricted Cash Pledged (dollars in thousands)Warehouse line, maturing on various dates(1)$898,785 1.65% $1,268,593 $33,876Warehouse line, due June 2016328,484 1.53% 470,935 —Warehouse line, due November 2016(2)175,000 1.99% — —Warehouse line, due November 2016(2)250,000 1.99% — 2,502Warehouse line, due July 2017(3)1,136,620 1.26% 1,327,405 39,890Warehouse line, due July 2017(4)2,151,543 1.37% 3,301,792 59,169Warehouse line, due December 20171,342,277 1.59% 1,903,553 45,797Warehouse line, due January 201873,000 3.13% 102,309 —Warehouse line, due March 2018(5)886,199 1.26% 1,287,618 28,733Repurchase facility, due December 2016(6)1,147,361 2.51% — 44,767Line of credit with related party, due December 2016(7)500,000 2.74% — —Line of credit with related party, due December 2016(7)1,000,000 2.70% — —Line of credit with related party, due December 2018(7)975,000 2.94% — —     Total SC revolving credit facilities$10,864,269 1.89% $9,662,205 $254,734(1)  As of March 31, 2016, half of the outstanding balance on this facility matures in March 2017 and half matures in March 2018. (2)  These lines are collateralized by residuals retained by SC.(3)  This line is held exclusively for financing Chrysler Capital Loans.(4)  This line is held exclusively for financing Chrysler Capital Leases.(5)  As of December 31, 2015 this warehouse line was due at September 2017.(6)  This repurchase facility is collateralized by securitization notes payable retained by SC. No portion of this facility is unsecured. This facility has rolling 30-day and 90-day maturities.(7)  These lines are also collateralized by securitization notes payable and residuals retained by SC. As of March 31, 2016, $1.6 billion of the aggregate outstanding balances on these credit facilities was unsecured. NOTE 10. BORROWINGS (continued) December 31, 2015 Balance EffectiveRate Assets Pledged Restricted Cash Pledged (dollars in thousands)Warehouse line, maturing on various dates(1)$808,135 1.29% $1,137,257 $24,942Warehouse line, due June 2016378,301 1.48% 535,737 —Warehouse line, due November 2016(2)175,000 1.90% — —Warehouse line, due November 2016(2)250,000 1.90% — 2,501Warehouse line, due July 2017(3)682,720 1.35% 809,185 20,852Warehouse line, due July 2017(4)2,247,443 1.41% 3,412,321 48,589Warehouse line, due September 2017565,399 1.20% 824,327 15,759Warehouse line, due December 2017 (5)944,877 1.56% 1,345,051 32,038Repurchase facility, due December 2016(6)850,904 2.07% — 34,166Line of credit with related party, due December 2016(7)500,000 2.65% — —Line of credit with related party, due December 2016(7)1,000,000 2.61% — —Line of credit with related party, due December 2018(7)800,000 2.84% — —     Total SC revolving credit facilities$9,202,779 1.81% $8,063,878 $178,847(1)  As of December 31, 2015, half of the outstanding balance on this facility matured in March 2016 and half matured in March 2017. On March 29, 2016, the facility was amended to, among other changes, extend the maturity for half of the balance to March 2017 and half to March 2018.(2)  These lines are collateralized by residuals retained by SC.(3)  This line is held exclusively for financing Chrysler Capital Loans.(4)  This line is held exclusively for financing Chrysler Capital Leases.(5)  In December 2015, the commitment on this warehouse line was amended to extend the commitment termination date to December 2017.(6)  This repurchase facility is collateralized by securitization notes payable retained by SC. No portion of this facility is unsecured. This facility has rolling 30-day and 90-day maturities.(7)  These lines are also collateralized by securitization notes payable and residuals retained by SC. As of December 31, 2015, $1.4 billion of the aggregate outstanding balances on these credit facilities was unsecured.Secured Structured FinancingsThe following tables present information regarding SC's secured structured financings as of March 31, 2016 and December 31, 2015: March 31, 2016 Balance Initial Note Amounts Issued Initial Weighted Average Interest Rate Range Collateral Restricted Cash (dollars in thousands)SC public securitizations, maturing on various dates(1)$12,565,678 $26,563,082 0.89% - 2.44% $16,452,180 $1,396,275SC privately issued amortizing notes, maturing on various dates(1)7,790,231 11,535,991 0.88% - 2.81% 11,029,245 498,836     Total SC secured structured financings$20,355,909 $38,099,073 0.88% - 2.81% $27,481,425 $1,895,111(1)  SC has entered into various securitization transactions involving its retail automotive installment loans and leases. These transactions are accounted for as secured financings and therefore both the securitized RICs, and the related securitization debt issued by SPEs, remain on the Condensed Consolidated Balance Sheets. The maturity of this debt is based on the timing of repayments from the securitized assets.NOTE 10. BORROWINGS (continued) December 31, 2015 Balance Initial Note Amounts Issued Initial Weighted Average Interest Rate Range Collateral Restricted Cash (dollars in thousands)SC public securitizations, maturing on various dates(1)$12,679,987 $24,923,292 0.89% - 2.29% $16,256,067 $1,242,857SC privately issued amortizing notes, maturing on various dates(1)8,213,217 11,729,171 0.88% - 2.81% 11,495,352 457,840     Total SC secured structured financings$20,893,204 $36,652,463 0.88% - 2.81% $27,751,419 $1,700,697(1)  SC has entered into various securitization transactions involving its retail automotive installment loans and leases. These transactions are accounted for as secured financings and therefore both the securitized RICs, and the related securitization debt issued by SPEs, remain on the Condensed Consolidated Balance Sheets. The maturity of this debt is based on the timing of repayments from the securitized assets.Most of the SC's secured structured financings are in the form of public, SEC-registered securitizations. The Company also executes private securitizations under Rule 144A of the Securities Act of 1933, as amended (the "Securities Act"), and periodically issues private term amortizing notes, which are structured similarly to securitizations but are acquired by banks and conduits. The Company's securitizations and private issuances are collateralized by RICs or vehicle leases.   |

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| - Definition
The entire disclosure for information about short-term and long-term debt arrangements, which includes amounts of borrowings under each line of credit, note payable, commercial paper issue, bonds indenture, debenture issue, own-share lending arrangements and any other contractual agreement to repay funds, and about the underlying arrangements, rationale for a classification as long-term, including repayment terms, interest rates, collateral provided, restrictions on use of assets and activities, whether or not in compliance with debt covenants, and other matters important to users of the financial statements, such as the effects of refinancing and noncompliance with debt covenants.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21475-112644Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19,20,22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682
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