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Subsequent Event (Details) - USD ($) $ in Millions | Jul. 13, 2016 | May 26, 2016
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Private Education Loans |  |
Subsequent Event [Line Items] |  |
Total loan amount securitized at inception for the 2016 on-balance sheet term securitization |  | $ 551
Proceeds from loan securitization sold to third parties |  | $ 501
Private Education Loans | Subsequent Event |  |
Subsequent Event [Line Items] |  |
Total loan amount securitized at inception for the 2016 on-balance sheet term securitization | $ 657 |
Proceeds from loan securitization sold to third parties | 605 |
AAA Rated Notes | Subsequent Event |  |
Subsequent Event [Line Items] |  |
Amount of loan securitization sold to third parties | $ 607 |
Class B Notes |  |
Subsequent Event [Line Items] |  |
Ownership interest percentage |  | 100.00%
Class B Notes | Subsequent Event |  |
Subsequent Event [Line Items] |  |
Ownership interest percentage | 100.00% |

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- Definition Loans Securitized or Asset-Backed Financing Arrangement, Ownership Interest, Percentage + References No definition available. + Details
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- Definition Principal amount of transferred financial assets in which the transferor has continuing involvement with the assets underlying the transaction. Continuing involvement includes, but is not limited to, servicing, recourse, and restrictions on transferor's interests in transferred financial assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=64830801&loc=d3e107314-111719 + Details
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- Definition This is the principal amount outstanding for loans which are in the process of being securitized as of the date of the statement of financial position (across all types of loans). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=64830801&loc=d3e107314-111719 + Details
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- Definition The cash inflow from the issuance of long-term debt that is not secured by collateral. Excludes proceeds from tax exempt unsecured debt. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3255-108585 + Details
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- Definition Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event. + References No definition available. + Details
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- Details
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- Details
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- Details
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- Details
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