Summary of Significant Accounting Policies	6 Months Ended
Jun. 30, 2016
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Summary of Significant Accounting Policies Basis of Presentation The condensed consolidated financial statements include our accounts and the accounts of our consolidated subsidiaries, including certain special-purpose financing entities utilized in secured financing transactions, which are considered variable interest entities ("VIEs"). All intercompany transactions and balances have been eliminated in consolidation. The interim period consolidated financial statements, including the notes thereto, are condensed and do not include all disclosures required by generally accepted accounting principles ("GAAP") in the United States of America. These interim period condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements that are included in our Annual Report on Form 10-K filed on February 3, 2016 ("Form 10-K"). The condensed consolidated financial statements at June 30, 2016, and for the three and six months ended June 30, 2016 and 2015, are unaudited and, in management’s opinion, include all adjustments, consisting of normal recurring adjustments, necessary for a fair presentation of the results for such interim periods. The results for interim periods are not necessarily indicative of results for a full year. Segment Information We are the wholly-owned captive finance subsidiary of General Motors Company ("GM"). We offer substantially similar products and services throughout many different regions, subject to local regulations and market conditions. We evaluate our business in two operating segments. The North America Segment includes our operations in the U.S. and Canada. The International Segment includes our operations in all other countries. For additional financial information regarding our business segments, see Note 13 - "Segment Reporting." Accounting Standards Not Yet Adopted In February 2016 the Financial Accounting Standards Board ("FASB") issued ASU 2016-02, “Leases” (ASU 2016-02), which requires the lessee to recognize most leases on the balance sheet thereby resulting in the recognition of lease assets and liabilities for those leases currently classified as operating leases. The accounting for lessors is largely unchanged. ASU 2016-02 is effective for annual reporting periods beginning after December 15, 2018 with early adoption permitted. We are currently assessing the impact the adoption of ASU 2016-02 will have on our consolidated financial statements. In June 2016 ASU 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments (ASU 2016-13), was issued and requires entities to use a current expected credit loss ("CECL") model which is a new impairment model based on expected losses rather than incurred losses. Under this model an entity would recognize an impairment allowance equal to its current estimate of all contractual cash flows that the entity does not expect to collect from financial assets measured at amortized cost. The entity's estimate would consider relevant information about past events, current conditions, and reasonable and supportable forecasts, which will result in recognition of lifetime expected credit losses upon loan origination. ASU 2016-13 is effective for interim and annual reporting periods beginning after December 15, 2019, with early adoption permitted for annual reporting periods beginning after December 15, 2018. We are currently assessing the impact the adoption of ASU 2016-13 will have on our consolidated financial statements.

Summary of Significant Accounting Policies

Basis of Presentation

The condensed consolidated financial statements include our accounts and the accounts of our consolidated subsidiaries, including certain special-purpose financing entities utilized in secured financing transactions, which are considered variable interest entities ("VIEs"). All intercompany transactions and balances have been eliminated in consolidation.

The interim period consolidated financial statements, including the notes thereto, are condensed and do not include all disclosures required by generally accepted accounting principles ("GAAP") in the United States of America. These interim period condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements that are included in our Annual Report on Form 10-K filed on February 3, 2016 ("Form 10-K").

The condensed consolidated financial statements at June 30, 2016, and for the three and six months ended June 30, 2016 and 2015, are unaudited and, in management’s opinion, include all adjustments, consisting of normal recurring adjustments, necessary for a fair presentation of the results for such interim periods. The results for interim periods are not necessarily indicative of results for a full year.

Segment Information

We are the wholly-owned captive finance subsidiary of General Motors Company ("GM"). We offer substantially similar products and services throughout many different regions, subject to local regulations and market conditions. We evaluate our business in two operating segments. The North America Segment includes our operations in the U.S. and Canada. The International Segment includes our operations in all other countries. For additional financial information regarding our business segments, see Note 13 - "Segment Reporting."

Accounting Standards Not Yet Adopted

In February 2016 the Financial Accounting Standards Board ("FASB") issued ASU 2016-02, “Leases” (ASU 2016-02), which requires the lessee to recognize most leases on the balance sheet thereby resulting in the recognition of lease assets and liabilities for those leases currently classified as operating leases. The accounting for lessors is largely unchanged. ASU 2016-02 is effective for annual reporting periods beginning after December 15, 2018 with early adoption permitted. We are currently assessing the impact the adoption of ASU 2016-02 will have on our consolidated financial statements.

In June 2016 ASU 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments (ASU 2016-13), was issued and requires entities to use a current expected credit loss ("CECL") model which is a new impairment model based on expected losses rather than incurred losses. Under this model an entity would recognize an impairment allowance equal to its current estimate of all contractual cash flows that the entity does not expect to collect from financial assets measured at amortized cost. The entity's estimate would consider relevant information about past events, current conditions, and reasonable and supportable forecasts, which will result in recognition of lifetime expected credit losses upon loan origination. ASU 2016-13 is effective for interim and annual reporting periods beginning after December 15, 2019, with early adoption permitted for annual reporting periods beginning after December 15, 2018. We are currently assessing the impact the adoption of ASU 2016-13 will have on our consolidated financial statements.