Significant Accounting Policies	9 Months Ended
Sep. 30, 2015
Accounting Policies [Abstract]
Significant Accounting Policies	Significant Accounting Policies Basis of Presentation The accompanying unaudited, consolidated financial statements of SLM Corporation (“we,” “us,” “our,” “Sallie Mae,” or the “Company”) have been prepared in accordance with generally accepted accounting principles in the United States of America (“GAAP”) for interim financial information. Accordingly, they do not include all the information and footnotes required by GAAP for complete consolidated financial statements. The consolidated financial statements include the accounts of SLM Corporation and its majority-owned and controlled subsidiaries after eliminating the effects of intercompany accounts and transactions. In the opinion of management, all adjustments considered necessary for a fair statement of the results for the interim periods have been included. The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. Actual results could differ from those estimates. Operating results for the three and nine months ended September 30, 2015 are not necessarily indicative of the results for the year ending December 31, 2015 or for any other period. These unaudited financial statements should be read in conjunction with the audited financial statements and related notes included in our Annual Report on Form 10-K for the year ended December 31, 2014 (the “2014 Form 10-K”). On April 30, 2014, we completed our plan to legally separate into two distinct publicly traded entities - an education loan management, servicing and asset recovery business, Navient Corporation (“Navient”), and a consumer banking business, SLM Corporation. The separation of Navient from SLM Corporation (the “Spin-Off”) was preceded by an internal corporate reorganization, which was the first step to separate the education loan management, servicing and asset recovery business from the consumer banking business. For periods before the Spin-Off, the financial statements are presented on a basis of accounting that reflects a change in reporting entity and have been adjusted for the effects of the Spin-Off. These carved-out financial statements and selected financial information represent only those operations, assets, liabilities and equity that form Sallie Mae on a stand-alone basis. Because the Spin-Off occurred on April 30, 2014, the balances before that date include the carved-out financial results. Consolidation The consolidated financial statements include the accounts of the Company and its majority-owned and controlled subsidiaries after eliminating the effects of intercompany accounts and transactions. Restricted Cash and Investments Restricted cash and investments primarily includes amounts held in student loan securitization trusts and other secured borrowings. This cash must be used to make payments related to trust obligations. Amounts on deposit in these accounts are primarily the result of timing differences between when principal and interest is collected on the trust assets and when principal and interest is paid on trust liabilities. Recently Issued Accounting Pronouncements On February 18, 2015, the FASB issued Accounting Standards Update (“ASU”) No. 2015-02, “Consolidation (Topic 810): Amendments to the Consolidation Analysis,” which amends the current consolidation guidance. The amendments reduce the number of consolidation models through the elimination of the indefinite deferral of ASC 810 and place more emphasis on risk of loss when determining a controlling financial interest. The standard is effective January 1, 2016, with early adoption permitted during an interim period in fiscal year 2015. In the third quarter of 2015, we elected to early adopt the new accounting guidance retrospectively to July 1, 2015. The early adoption of this standard had no impact on our consolidated financial statements.

Significant Accounting Policies

Basis of Presentation

The accompanying unaudited, consolidated financial statements of SLM Corporation (“we,” “us,” “our,” “Sallie Mae,” or the “Company”) have been prepared in accordance with generally accepted accounting principles in the United States of America (“GAAP”) for interim financial information. Accordingly, they do not include all the information and footnotes required by GAAP for complete consolidated financial statements. The consolidated financial statements include the accounts of SLM Corporation and its majority-owned and controlled subsidiaries after eliminating the effects of intercompany accounts and transactions. In the opinion of management, all adjustments considered necessary for a fair statement of the results for the interim periods have been included. The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. Actual results could differ from those estimates. Operating results for the three and nine months ended September 30, 2015 are not necessarily indicative of the results for the year ending December 31, 2015 or for any other period. These unaudited financial statements should be read in conjunction with the audited financial statements and related notes included in our Annual Report on Form 10-K for the year ended December 31, 2014 (the “2014 Form 10-K”).

On April 30, 2014, we completed our plan to legally separate into two distinct publicly traded entities - an education loan management, servicing and asset recovery business, Navient Corporation (“Navient”), and a consumer banking business, SLM Corporation. The separation of Navient from SLM Corporation (the “Spin-Off”) was preceded by an internal corporate reorganization, which was the first step to separate the education loan management, servicing and asset recovery business from the consumer banking business.

For periods before the Spin-Off, the financial statements are presented on a basis of accounting that reflects a change in reporting entity and have been adjusted for the effects of the Spin-Off. These carved-out financial statements and selected financial information represent only those operations, assets, liabilities and equity that form Sallie Mae on a stand-alone basis. Because the Spin-Off occurred on April 30, 2014, the balances before that date include the carved-out financial results.

Consolidation

The consolidated financial statements include the accounts of the Company and its majority-owned and controlled subsidiaries after eliminating the effects of intercompany accounts and transactions.

Restricted Cash and Investments

Restricted cash and investments primarily includes amounts held in student loan securitization trusts and other secured borrowings. This cash must be used to make payments related to trust obligations. Amounts on deposit in these accounts are primarily the result of timing differences between when principal and interest is collected on the trust assets and when principal and interest is paid on trust liabilities.

Recently Issued Accounting Pronouncements

On February 18, 2015, the FASB issued Accounting Standards Update (“ASU”) No. 2015-02, “Consolidation (Topic 810): Amendments to the Consolidation Analysis,” which amends the current consolidation guidance. The amendments reduce the number of consolidation models through the elimination of the indefinite deferral of ASC 810 and place more emphasis on risk of loss when determining a controlling financial interest. The standard is effective January 1, 2016, with early adoption permitted during an interim period in fiscal year 2015. In the third quarter of 2015, we elected to early adopt the new accounting guidance retrospectively to July 1, 2015. The early adoption of this standard had no impact on our consolidated financial statements.