XML 128 R75.htm IDEA: XBRL DOCUMENT
v3.19.3.a.u2

Borrowings - Additional Information (Details) - USD ($) |  |  |  |  |  |  |  | 12 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Feb. 12, 2020 | Jun. 12, 2019 | Mar. 13, 2019 | Feb. 20, 2019 | Sep. 19, 2018 | Jun. 20, 2018 | Mar. 21, 2018 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017 | Feb. 19, 2020 | Apr. 05, 2017
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Amount drawn and outstanding under ABCP facility |  |  |  |  |  |  |  | $ 289,230,000 | $ 0 |  |  |
Total Issued |  |  |  |  |  |  |  | 1,110,000,000 | 1,900,500,000 |  |  |
Unsecured debt issued |  |  |  |  |  |  |  | $ 0 | $ 0 | $ 197,000,000 |  |
Estimated weighted average life of student loans |  |  |  |  |  |  |  | 5 years 4 months 24 days | 5 years 5 months |  |  |
Discretionary uncommitted federal funds line of credit |  |  |  |  |  |  |  | $ 125,000,000 |  |  |  |
Lendable value of collateral |  |  |  |  |  |  |  | 3,200,000,000 | $ 3,100,000,000 |  |  |
Unsecured Debt |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Amount drawn and outstanding under ABCP facility |  |  |  |  |  |  |  | 0 | 0 |  |  |
ABCP borrowings |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Amount drawn and outstanding under ABCP facility |  |  |  |  |  |  |  | $ 289,230,000 | 0 |  |  |
Contractual maturity related to ABCP facility |  |  |  |  |  |  |  | 2 years |  |  |  |
Revolving period of contractual maturity |  |  |  |  |  |  |  | 1 year |  |  |  |
Amortization period of contractual maturity |  |  |  |  |  |  |  | 1 year |  |  |  |
Senior Unsecured Notes Due April 5, 2022 | Unsecured Debt |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total Issued |  |  |  |  |  |  |  | $ 198,000,000 |  |  |  | $ 200,000,000
Interest rate |  |  |  |  |  |  |  |  |  |  |  | 5.125%
Private Education Loans 2019 Term A |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Private education loan term accounted for as a secured financing |  |  | $ 453,000,000 |  |  |  |  |  |  |  |  |
Loans sold to third parties |  |  | $ 453,000,000 |  |  |  |  |  |  |  |  |
Ownership interest percentage on asset-backed financing |  |  | 100.00% |  |  |  |  |  |  |  |  |
Unsecured debt issued |  |  | $ 451,000,000 |  |  |  |  |  |  |  |  |
Loans pledged as collateral |  |  |  |  |  |  |  | 445,000,000 |  |  |  |
Principal amount of collateral |  |  |  |  |  |  |  | 417,000,000 |  |  |  |
Capitalized interest |  |  |  |  |  |  |  | 28,000,000 |  |  |  |
Class A and B Notes |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Estimated weighted average life of student loans |  | 4 years 4 months 28 days | 4 years 3 months 3 days |  | 4 years 3 months 25 days | 4 years 4 months 24 days | 4 years 5 months 4 days |  |  |  |  |
Class A and B Notes | London Interbank Offered Rate (LIBOR) |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate |  | 1.01% | 92.00% |  | 0.77% | 0.76% | 0.78% |  |  |  |  |
Private Education Loans 2019 Term B |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Private education loan term accounted for as a secured financing |  | $ 657,000,000 |  |  |  |  |  |  |  |  |  |
Loans sold to third parties |  | $ 657,000,000 |  |  |  |  |  |  |  |  |  |
Ownership interest percentage on asset-backed financing |  | 100.00% |  |  |  |  |  |  |  |  |  |
Unsecured debt issued |  | $ 655,000,000 |  |  |  |  |  |  |  |  |  |
Loans pledged as collateral |  |  |  |  |  |  |  | 666,000,000 |  |  |  |
Principal amount of collateral |  |  |  |  |  |  |  | 625,000,000 |  |  |  |
Capitalized interest |  |  |  |  |  |  |  | 41,000,000 |  |  |  |
Private Education Loans 2018 Term A |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Private education loan term accounted for as a secured financing |  |  |  |  |  |  | $ 670,000,000 |  |  |  |  |
Loans sold to third parties |  |  |  |  |  |  | $ 670,000,000 |  |  |  |  |
Ownership interest percentage on asset-backed financing |  |  |  |  |  |  | 100.00% |  |  |  |  |
Unsecured debt issued |  |  |  |  |  |  | $ 668,000,000 |  |  |  |  |
Loans pledged as collateral |  |  |  |  |  |  |  | 588,000,000 |  |  |  |
Principal amount of collateral |  |  |  |  |  |  |  | 553,000,000 |  |  |  |
Capitalized interest |  |  |  |  |  |  |  | 35,000,000 |  |  |  |
Private Education Loans 2018 Term B |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Private education loan term accounted for as a secured financing |  |  |  |  |  | $ 687,000,000 |  |  |  |  |  |
Loans sold to third parties |  |  |  |  |  | $ 687,000,000 |  |  |  |  |  |
Ownership interest percentage on asset-backed financing |  |  |  |  |  | 100.00% |  |  |  |  |  |
Unsecured debt issued |  |  |  |  |  | $ 683,000,000 |  |  |  |  |  |
Loans pledged as collateral |  |  |  |  |  |  |  | 623,000,000 |  |  |  |
Principal amount of collateral |  |  |  |  |  |  |  | 585,000,000 |  |  |  |
Capitalized interest |  |  |  |  |  |  |  | 38,000,000 |  |  |  |
Private Education Loans 2018 Term C |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Private education loan term accounted for as a secured financing |  |  |  |  | $ 544,000,000 |  |  |  |  |  |  |
Loans sold to third parties |  |  |  |  | $ 544,000,000 |  |  |  |  |  |  |
Ownership interest percentage on asset-backed financing |  |  |  |  | 100.00% |  |  |  |  |  |  |
Unsecured debt issued |  |  |  |  | $ 541,000,000 |  |  |  |  |  |  |
Loans pledged as collateral |  |  |  |  |  |  |  | 502,000,000 |  |  |  |
Principal amount of collateral |  |  |  |  |  |  |  | 471,000,000 |  |  |  |
Capitalized interest |  |  |  |  |  |  |  | 31,000,000 |  |  |  |
ABS Transactions |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Private education loan term accounted for as a secured financing |  |  |  |  |  |  |  |  |  | $ 3,900,000,000 |  |
Private Education Loans |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Private education loan term accounted for as a secured financing |  |  |  |  |  |  |  | 2,700,000,000 |  |  |  |
Principal amount of collateral |  |  |  |  |  |  |  | 2,600,000,000 |  |  |  |
Capitalized interest |  |  |  |  |  |  |  | 115,000,000 |  |  |  |
Subsequent Event | Class A and B Notes |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Estimated weighted average life of student loans | 4 years 2 months 4 days |  |  |  |  |  |  |  |  |  |  |
Subsequent Event | Class A and B Notes | London Interbank Offered Rate (LIBOR) |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate | 0.88% |  |  |  |  |  |  |  |  |  |  |
Commercial Paper | ABCP borrowings |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Private education loan funding |  |  |  | $ 750,000,000 |  |  |  |  |  |  |  |
Ownership interest percentage |  |  |  | 100.00% |  |  |  |  |  |  |  |
Amount drawn and outstanding under ABCP facility |  |  |  |  |  |  |  | $ 289,000,000 | $ 0 |  |  |
Commercial Paper | Subsequent Event | ABCP borrowings |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Private education loan funding |  |  |  |  |  |  |  |  |  |  | $ 2,000,000,000 |

X
- Definition Contractual Maturity + References No definition available. + Details
Name: | slm_ContractualMaturity
Namespace Prefix: | slm_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Debt Instrument, Contractual Maturity, Term, Amortization Period + References No definition available. + Details
Name: | slm_DebtInstrumentContractualMaturityTermAmortizationPeriod
Namespace Prefix: | slm_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Debt Instrument, Contractual Maturity, Term, Revolving Period + References No definition available. + Details
Name: | slm_DebtInstrumentContractualMaturityTermRevolvingPeriod
Namespace Prefix: | slm_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Estimated weighted average life of student loans. + References No definition available. + Details
Name: | slm_EstimatedWeightedAverageLifeOfStudentLoans
Namespace Prefix: | slm_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Lendable value of collateral + References No definition available. + Details
Name: | slm_Lendablevalueofcollateral
Namespace Prefix: | slm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Loans Pledged As Collateral, Capitalized Interest + References No definition available. + Details
Name: | slm_LoansPledgedAsCollateralCapitalizedInterest
Namespace Prefix: | slm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Loans Pledged As Collateral, Principal Amount + References No definition available. + Details
Name: | slm_LoansPledgedAsCollateralPrincipalAmount
Namespace Prefix: | slm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Loans Securitized or Asset-Backed Financing Arrangement, Ownership Interest, Percentage + References No definition available. + Details
Name: | slm_LoansSecuritizedorAssetBackedFinancingArrangementOwnershipInterestPercentage
Namespace Prefix: | slm_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Ownership Interest Percentage + References No definition available. + Details
Name: | slm_OwnershipInterestPercentage
Namespace Prefix: | slm_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Uncommitted Federal Funds + References No definition available. + Details
Name: | slm_UncommittedFederalFunds
Namespace Prefix: | slm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- 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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=118948506&loc=d3e107314-111719 + Details
Name: | us-gaap_ContinuingInvolvementWithTransferredFinancialAssetsPrincipalAmountOutstanding
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Percentage points added to the reference rate to compute the variable rate on the debt instrument. + References No definition available. + Details
Name: | us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Face (par) amount of debt instrument at time of issuance. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28551-108399 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400 + Details
Name: | us-gaap_DebtInstrumentFaceAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
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_DebtInstrumentLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Carrying amount as of the balance sheet date of loans that have been pledged as collateral for borrowings. If the secured party has the right by contract or custom to sell or re-pledge the collateral, then the debtor reclassifies that asset and report that asset in its statement of financial position separately from other assets not so encumbered. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=66007379&loc=d3e113888-111728 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=118936363&loc=d3e5086-111524 + Details
Name: | us-gaap_LoansPledgedAsCollateral
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- 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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118948506&loc=d3e107314-111719 + Details
Name: | us-gaap_PrincipalAmountOutstandingOnLoansHeldForSaleOrSecuritization
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- 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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3255-108585 + Details
Name: | us-gaap_ProceedsFromIssuanceOfUnsecuredDebt
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Reflects the total carrying amount as of the balance sheet date of debt having initial terms less than one year or the normal operating cycle, if longer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(19)(a)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(16)(a)(1)) -URI http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(13)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
Name: | us-gaap_ShortTermBorrowings
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=us-gaap_UnsecuredDebtMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=slm_ABCPBorrowingsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=slm_SeniorUnsecuredNotesDueApril52022Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=slm_PrivateEducationLoans2019TermAMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=slm_ClassAandBNotesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_VariableRateAxis=us-gaap_LondonInterbankOfferedRateLIBORMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=slm_PrivateEducationLoans2019TermBMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=slm_PrivateEducationLoans2018TermAMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=slm_PrivateEducationLoans2018TermBMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=slm_PrivateEducationLoans2018TermCMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=slm_ABSTransactionsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=slm_PrivateEducationLoansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CreditFacilityAxis=us-gaap_CommercialPaperMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |