XML 95 R77.htm IDEA: XBRL DOCUMENT
v3.20.4

Allowance for Credit Losses - Loan Status and Aging of Past Due TDR Loans (Details) - Student Loan - Consumer Portfolio Segment - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | --- | ---
TDR loans in repayment and percentage of each status: |  |  |
Total Private Education Loans in repayment, 2020 | $ 2,052,521 |  |
Total | 13,898,948 | $ 16,315,651 | $ 14,289,705
Troubled Debt Restructured Loans |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
TDR loans in in-school/grace/deferment | 88,750 | 87,749 |
TDR loans in repayment and percentage of each status: |  |  |
Total Private Education Loans in forbearance, 2020 | 76,704 | 99,054 |
Loans current | 971,880 | 1,230,954 |
Total Private Education Loans in repayment, 2020 | $ 1,109,136 | $ 1,395,163 |
Loans current, in percentage | 87.70% | 88.20% |
Total TDR loans in repayment(3) | 100.00% | 100.00% |
Total | $ 1,274,590 | $ 1,581,966 |
Loans delinquent 31-60 days |  |  |
TDR loans in repayment and percentage of each status: |  |  |
Total | 205,528 | 288,051 | 231,216
Loans delinquent 31-60 days | Troubled Debt Restructured Loans |  |  |
TDR loans in repayment and percentage of each status: |  |  |
Loans delinquent | $ 59,249 | $ 85,555 |
Loans delinquent (in percentage) | 5.30% | 6.10% |
Loans delinquent 61-90 days |  |  |
TDR loans in repayment and percentage of each status: |  |  |
Total | $ 119,643 | $ 121,302 | 95,105
Loans delinquent 61-90 days | Troubled Debt Restructured Loans |  |  |
TDR loans in repayment and percentage of each status: |  |  |
Loans delinquent | $ 43,576 | $ 49,626 |
Loans delinquent (in percentage) | 3.90% | 3.60% |
Loans delinquent greater than 90 days |  |  |
TDR loans in repayment and percentage of each status: |  |  |
Total | $ 80,702 | $ 62,666 | $ 50,830
Loans delinquent greater than 90 days | Troubled Debt Restructured Loans |  |  |
TDR loans in repayment and percentage of each status: |  |  |
Loans delinquent | $ 34,431 | $ 29,028 |
Loans delinquent (in percentage) | 3.10% | 2.10% |

X
- Definition Financing Receivable, Loans In Forbearance, Originated In Current Fiscal Year + References No definition available. + Details
Name: | slm_FinancingReceivableLoansInForbearanceOriginatedInCurrentFiscalYear
Namespace Prefix: | slm_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Loan status in school grace and deferment recorded investment. + References No definition available. + Details
Name: | slm_LoanStatusInSchoolGraceAndDefermentRecordedInvestment
Namespace Prefix: | slm_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Loans in repayment and percentage of each status. + References No definition available. + Details
Name: | slm_LoansInRepaymentAndPercentageOfEachStatusAbstract
Namespace Prefix: | slm_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Loans in repayment current in percentage. + References No definition available. + Details
Name: | slm_LoansInRepaymentCurrentInPercentage
Namespace Prefix: | slm_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Total loans in repayment, in percentage. + References No definition available. + Details
Name: | slm_LoansInRepaymentInPercentage
Namespace Prefix: | slm_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Total loans in repayment. + References No definition available. + Details
Name: | slm_LoansInRepaymentOriginatedInCurrentFiscalYear
Namespace Prefix: | slm_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_AccountsNotesAndLoansReceivableLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of financing receivable balance that is past due. + References No definition available. + Details
Name: | us-gaap_FinancingReceivablePercentPastDue1
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount of financing receivable not past due. + References Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7A -URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953401-111524 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 55 -Paragraph 80 -URI http://asc.fasb.org/extlink&oid=121647567&loc=SL82922355-210448 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 14 -URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919253-210447 + Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentCurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of financing receivable past due. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 55 -Paragraph 80 -URI http://asc.fasb.org/extlink&oid=121647567&loc=SL82922355-210448 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 14 -URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919253-210447 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7A -URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953401-111524 + Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentPastDue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount, before allowance for credit loss, of financing receivable. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 55 -Paragraph 79 -URI http://asc.fasb.org/extlink&oid=121647567&loc=SL82922352-210448 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 5 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919230-210447 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 55 -Paragraph 80 -URI http://asc.fasb.org/extlink&oid=121647567&loc=SL82922355-210448 + Details
Name: | us-gaap_NotesReceivableGross
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_StudentLoanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_ConsumerPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis=slm_TroubledDebtRestructuredLoansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablesPeriodPastDueAxis=slm_FinancingReceivables31to60DaysPastDueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablesPeriodPastDueAxis=slm_FinancingReceivables61to90DaysPastDueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablesPeriodPastDueAxis=slm_FinancingReceivablesGreaterThan90DaysPastDueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |