3.19.2 html 669 351 1 false 127 0 false 8 false false R1.htm 100000 - Document - Document and Entity Information Sheet http://www.navient.com/20190630/taxonomy/role/DocumentDocumentAndEntityInformation Document and Entity Information Cover 1 false false R2.htm 100010 - Statement - Consolidated Balance Sheets (Unaudited) Sheet http://www.navient.com/20190630/taxonomy/role/StatementConsolidatedBalanceSheetsUnaudited Consolidated Balance Sheets (Unaudited) Statements 2 false false R3.htm 100020 - Statement - Consolidated Balance Sheets (Unaudited) (Parenthetical) Sheet http://www.navient.com/20190630/taxonomy/role/StatementConsolidatedBalanceSheetsUnauditedParenthetical Consolidated Balance Sheets (Unaudited) (Parenthetical) Statements 3 false false R4.htm 100030 - Statement - Consolidated Statements of Income (Unaudited) Sheet http://www.navient.com/20190630/taxonomy/role/StatementConsolidatedStatementsOfIncomeUnaudited Consolidated Statements of Income (Unaudited) Statements 4 false false R5.htm 100040 - Statement - Consolidated Statements of Comprehensive Income (Unaudited) Sheet http://www.navient.com/20190630/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncomeUnaudited Consolidated Statements of Comprehensive Income (Unaudited) Statements 5 false false R6.htm 100050 - Statement - Consolidated Statements of Changes in Stockholders' Equity (Unaudited) Sheet http://www.navient.com/20190630/taxonomy/role/StatementConsolidatedStatementsOfChangesInStockholdersEquityUnaudited Consolidated Statements of Changes in Stockholders' Equity (Unaudited) Statements 6 false false R7.htm 100060 - Statement - Consolidated Statements of Changes in Stockholders' Equity (Unaudited) (Parenthetical) Sheet http://www.navient.com/20190630/taxonomy/role/StatementConsolidatedStatementsOfChangesInStockholdersEquityUnauditedParenthetical Consolidated Statements of Changes in Stockholders' Equity (Unaudited) (Parenthetical) Statements 7 false false R8.htm 100070 - Statement - Consolidated Statements of Cash Flows (Unaudited) Sheet http://www.navient.com/20190630/taxonomy/role/StatementConsolidatedStatementsOfCashFlowsUnaudited Consolidated Statements of Cash Flows (Unaudited) Statements 8 false false R9.htm 100080 - Disclosure - Significant Accounting Policies Sheet http://www.navient.com/20190630/taxonomy/role/DisclosureSignificantAccountingPolicies Significant Accounting Policies Notes 9 false false R10.htm 100090 - Disclosure - Allowance for Loan Losses Sheet http://www.navient.com/20190630/taxonomy/role/DisclosureAllowanceForLoanLosses Allowance for Loan Losses Notes 10 false false R11.htm 100100 - Disclosure - Borrowings Sheet http://www.navient.com/20190630/taxonomy/role/DisclosureBorrowings Borrowings Notes 11 false false R12.htm 100110 - Disclosure - Derivative Financial Instruments Sheet http://www.navient.com/20190630/taxonomy/role/DisclosureDerivativeFinancialInstruments Derivative Financial Instruments Notes 12 false false R13.htm 100120 - Disclosure - Other Assets Sheet http://www.navient.com/20190630/taxonomy/role/DisclosureOtherAssets Other Assets Notes 13 false false R14.htm 100130 - Disclosure - Stockholders' Equity Sheet http://www.navient.com/20190630/taxonomy/role/DisclosureStockholdersEquity Stockholders' Equity Notes 14 false false R15.htm 100140 - Disclosure - Earnings per Common Share Sheet http://www.navient.com/20190630/taxonomy/role/DisclosureEarningsPerCommonShare Earnings per Common Share Notes 15 false false R16.htm 100150 - Disclosure - Fair Value Measurements Sheet http://www.navient.com/20190630/taxonomy/role/DisclosureFairValueMeasurements Fair Value Measurements Notes 16 false false R17.htm 100160 - Disclosure - Commitments and Contingencies Sheet http://www.navient.com/20190630/taxonomy/role/DisclosureCommitmentsAndContingencies Commitments and Contingencies Notes 17 false false R18.htm 100170 - Disclosure - Revenue from Contracts with Customers Accounted for in Accordance with ASC 606 Sheet http://www.navient.com/20190630/taxonomy/role/DisclosureRevenueFromContractsWithCustomersAccountedForInAccordanceWithASC606 Revenue from Contracts with Customers Accounted for in Accordance with ASC 606 Notes 18 false false R19.htm 100180 - Disclosure - Segment Reporting Sheet http://www.navient.com/20190630/taxonomy/role/DisclosureSegmentReporting Segment Reporting Notes 19 false false R20.htm 100190 - Disclosure - Significant Accounting Policies (Policies) Sheet http://www.navient.com/20190630/taxonomy/role/DisclosureSignificantAccountingPoliciesPolicies Significant Accounting Policies (Policies) Policies http://www.navient.com/20190630/taxonomy/role/DisclosureSignificantAccountingPolicies 20 false false R21.htm 100200 - Disclosure - Allowance for Loan Losses (Tables) Sheet http://www.navient.com/20190630/taxonomy/role/DisclosureAllowanceForLoanLossesTables Allowance for Loan Losses (Tables) Tables http://www.navient.com/20190630/taxonomy/role/DisclosureAllowanceForLoanLosses 21 false false R22.htm 100210 - Disclosure - Borrowings (Tables) Sheet http://www.navient.com/20190630/taxonomy/role/DisclosureBorrowingsTables Borrowings (Tables) Tables http://www.navient.com/20190630/taxonomy/role/DisclosureBorrowings 22 false false R23.htm 100220 - Disclosure - Derivative Financial Instruments (Tables) Sheet http://www.navient.com/20190630/taxonomy/role/DisclosureDerivativeFinancialInstrumentsTables Derivative Financial Instruments (Tables) Tables http://www.navient.com/20190630/taxonomy/role/DisclosureDerivativeFinancialInstruments 23 false false R24.htm 100230 - Disclosure - Other Assets (Tables) Sheet http://www.navient.com/20190630/taxonomy/role/DisclosureOtherAssetsTables Other Assets (Tables) Tables http://www.navient.com/20190630/taxonomy/role/DisclosureOtherAssets 24 false false R25.htm 100240 - Disclosure - Stockholders' Equity (Tables) Sheet http://www.navient.com/20190630/taxonomy/role/DisclosureStockholdersEquityTables Stockholders' Equity (Tables) Tables http://www.navient.com/20190630/taxonomy/role/DisclosureStockholdersEquity 25 false false R26.htm 100250 - Disclosure - Earnings per Common Share (Tables) Sheet http://www.navient.com/20190630/taxonomy/role/DisclosureEarningsPerCommonShareTables Earnings per Common Share (Tables) Tables http://www.navient.com/20190630/taxonomy/role/DisclosureEarningsPerCommonShare 26 false false R27.htm 100260 - Disclosure - Fair Value Measurements (Tables) Sheet http://www.navient.com/20190630/taxonomy/role/DisclosureFairValueMeasurementsTables Fair Value Measurements (Tables) Tables http://www.navient.com/20190630/taxonomy/role/DisclosureFairValueMeasurements 27 false false R28.htm 100270 - Disclosure - Revenue from Contracts with Customers Accounted for in Accordance with ASC 606 (Tables) Sheet http://www.navient.com/20190630/taxonomy/role/DisclosureRevenueFromContractsWithCustomersAccountedForInAccordanceWithASC606Tables Revenue from Contracts with Customers Accounted for in Accordance with ASC 606 (Tables) Tables http://www.navient.com/20190630/taxonomy/role/DisclosureRevenueFromContractsWithCustomersAccountedForInAccordanceWithASC606 28 false false R29.htm 100280 - Disclosure - Segment Reporting (Tables) Sheet http://www.navient.com/20190630/taxonomy/role/DisclosureSegmentReportingTables Segment Reporting (Tables) Tables http://www.navient.com/20190630/taxonomy/role/DisclosureSegmentReporting 29 false false R30.htm 100290 - Disclosure - Significant Accounting Policies - Additional Information (Detail) Sheet http://www.navient.com/20190630/taxonomy/role/DisclosureSignificantAccountingPoliciesAdditionalInformationDetail Significant Accounting Policies - Additional Information (Detail) Details 30 false false R31.htm 100300 - Disclosure - Allowance for Loan Losses - Additional Information (Detail) Sheet http://www.navient.com/20190630/taxonomy/role/DisclosureAllowanceForLoanLossesAdditionalInformationDetail Allowance for Loan Losses - Additional Information (Detail) Details 31 false false R32.htm 100310 - Disclosure - Allowance for Loan Losses - Allowance for Credit Losses and Recorded Investments in Loans (Detail) Sheet http://www.navient.com/20190630/taxonomy/role/DisclosureAllowanceForLoanLossesAllowanceForCreditLossesAndRecordedInvestmentsInLoansDetail Allowance for Loan Losses - Allowance for Credit Losses and Recorded Investments in Loans (Detail) Details 32 false false R33.htm 100320 - Disclosure - Allowance for Loan Losses - Allowance for Credit Losses and Recorded Investments in Loans (Parenthetical) (Detail) Sheet http://www.navient.com/20190630/taxonomy/role/DisclosureAllowanceForLoanLossesAllowanceForCreditLossesAndRecordedInvestmentsInLoansParentheticalDetail Allowance for Loan Losses - Allowance for Credit Losses and Recorded Investments in Loans (Parenthetical) (Detail) Details 33 false false R34.htm 100330 - Disclosure - Allowance for Loan Losses - Age Analysis of Past Due Loans Delinquencies (Detail) Sheet http://www.navient.com/20190630/taxonomy/role/DisclosureAllowanceForLoanLossesAgeAnalysisOfPastDueLoansDelinquenciesDetail Allowance for Loan Losses - Age Analysis of Past Due Loans Delinquencies (Detail) Details 34 false false R35.htm 100340 - Disclosure - Allowance for Loan Losses - Private Education Loan Portfolio Stratified by Key Credit Quality Indicators (Detail) Sheet http://www.navient.com/20190630/taxonomy/role/DisclosureAllowanceForLoanLossesPrivateEducationLoanPortfolioStratifiedByKeyCreditQualityIndicatorsDetail Allowance for Loan Losses - Private Education Loan Portfolio Stratified by Key Credit Quality Indicators (Detail) Details 35 false false R36.htm 100350 - Disclosure - Allowance for Loan Losses - Private Education Loan Portfolio Stratified by Key Credit Quality Indicators (Parenthetical) (Detail) Sheet http://www.navient.com/20190630/taxonomy/role/DisclosureAllowanceForLoanLossesPrivateEducationLoanPortfolioStratifiedByKeyCreditQualityIndicatorsParentheticalDetail Allowance for Loan Losses - Private Education Loan Portfolio Stratified by Key Credit Quality Indicators (Parenthetical) (Detail) Details 36 false false R37.htm 100360 - Disclosure - Allowance for Loan Losses - Receivable for Partially Charged-Off Private Education Loans (Detail) Sheet http://www.navient.com/20190630/taxonomy/role/DisclosureAllowanceForLoanLossesReceivableForPartiallyChargedOffPrivateEducationLoansDetail Allowance for Loan Losses - Receivable for Partially Charged-Off Private Education Loans (Detail) Details 37 false false R38.htm 100370 - Disclosure - Allowance for Loan Losses - Recorded Investment, Unpaid Principal Balance and Related Allowance for TDR Loans (Detail) Sheet http://www.navient.com/20190630/taxonomy/role/DisclosureAllowanceForLoanLossesRecordedInvestmentUnpaidPrincipalBalanceAndRelatedAllowanceForTDRLoansDetail Allowance for Loan Losses - Recorded Investment, Unpaid Principal Balance and Related Allowance for TDR Loans (Detail) Details 38 false false R39.htm 100380 - Disclosure - Allowance for Loan Losses - Average Recorded Investment and Interest Income Recognized for TDR (Detail) Sheet http://www.navient.com/20190630/taxonomy/role/DisclosureAllowanceForLoanLossesAverageRecordedInvestmentAndInterestIncomeRecognizedForTDRDetail Allowance for Loan Losses - Average Recorded Investment and Interest Income Recognized for TDR (Detail) Details 39 false false R40.htm 100390 - Disclosure - Allowance for Loan Losses - Loans Modified Accounts for TDR (Detail) Sheet http://www.navient.com/20190630/taxonomy/role/DisclosureAllowanceForLoanLossesLoansModifiedAccountsForTDRDetail Allowance for Loan Losses - Loans Modified Accounts for TDR (Detail) Details 40 false false R41.htm 100400 - Disclosure - Allowance for Loan Losses - Accrued Interest Receivable (Detail) Sheet http://www.navient.com/20190630/taxonomy/role/DisclosureAllowanceForLoanLossesAccruedInterestReceivableDetail Allowance for Loan Losses - Accrued Interest Receivable (Detail) Details 41 false false R42.htm 100410 - Disclosure - Borrowings - Company's Borrowings (Detail) Sheet http://www.navient.com/20190630/taxonomy/role/DisclosureBorrowingsCompanySBorrowingsDetail Borrowings - Company's Borrowings (Detail) Details 42 false false R43.htm 100420 - Disclosure - Borrowings - Company's Borrowings (Parenthetical) (Detail) Sheet http://www.navient.com/20190630/taxonomy/role/DisclosureBorrowingsCompanySBorrowingsParentheticalDetail Borrowings - Company's Borrowings (Parenthetical) (Detail) Details 43 false false R44.htm 100430 - Disclosure - Borrowings - Financing VIEs (Detail) Sheet http://www.navient.com/20190630/taxonomy/role/DisclosureBorrowingsFinancingViesDetail Borrowings - Financing VIEs (Detail) Details 44 false false R45.htm 100440 - Disclosure - Borrowings - Financing VIEs (Parenthetical) (Detail) Sheet http://www.navient.com/20190630/taxonomy/role/DisclosureBorrowingsFinancingViesParentheticalDetail Borrowings - Financing VIEs (Parenthetical) (Detail) Details 45 false false R46.htm 100450 - Disclosure - Derivative Financial Instruments - Impact of Derivatives on Consolidated Balance Sheet (Detail) Sheet http://www.navient.com/20190630/taxonomy/role/DisclosureDerivativeFinancialInstrumentsImpactOfDerivativesOnConsolidatedBalanceSheetDetail Derivative Financial Instruments - Impact of Derivatives on Consolidated Balance Sheet (Detail) Details 46 false false R47.htm 100460 - Disclosure - Derivative Financial Instruments - Gross Positions without Impact of Master Netting Agreements (Detail) Sheet http://www.navient.com/20190630/taxonomy/role/DisclosureDerivativeFinancialInstrumentsGrossPositionsWithoutImpactOfMasterNettingAgreementsDetail Derivative Financial Instruments - Gross Positions without Impact of Master Netting Agreements (Detail) Details 47 false false R48.htm 100470 - Disclosure - Derivative Financial Instruments - Carrying Value and Related Fair Value Hedging Adjustments of Liabilities (Detail) Sheet http://www.navient.com/20190630/taxonomy/role/DisclosureDerivativeFinancialInstrumentsCarryingValueAndRelatedFairValueHedgingAdjustmentsOfLiabilitiesDetail Derivative Financial Instruments - Carrying Value and Related Fair Value Hedging Adjustments of Liabilities (Detail) Details 48 false false R49.htm 100480 - Disclosure - Derivative Financial Instruments - Additional Information (Detail) Sheet http://www.navient.com/20190630/taxonomy/role/DisclosureDerivativeFinancialInstrumentsAdditionalInformationDetail Derivative Financial Instruments - Additional Information (Detail) Details 49 false false R50.htm 100490 - Disclosure - Derivative Financial Instruments - Derivative Notional Values (Detail) Sheet http://www.navient.com/20190630/taxonomy/role/DisclosureDerivativeFinancialInstrumentsDerivativeNotionalValuesDetail Derivative Financial Instruments - Derivative Notional Values (Detail) Details 50 false false R51.htm 100500 - Disclosure - Derivative Financial Instruments - Mark-to-Market Impact of Derivatives on Consolidated Statements of Income (Detail) Sheet http://www.navient.com/20190630/taxonomy/role/DisclosureDerivativeFinancialInstrumentsMarkToMarketImpactOfDerivativesOnConsolidatedStatementsOfIncomeDetail Derivative Financial Instruments - Mark-to-Market Impact of Derivatives on Consolidated Statements of Income (Detail) Details 51 false false R52.htm 100510 - Disclosure - Derivative Financial Instruments - Collateral Held and Pledged (Detail) Sheet http://www.navient.com/20190630/taxonomy/role/DisclosureDerivativeFinancialInstrumentsCollateralHeldAndPledgedDetail Derivative Financial Instruments - Collateral Held and Pledged (Detail) Details 52 false false R53.htm 100520 - Disclosure - Other Assets - Schedule of Other Assets (Detail) Sheet http://www.navient.com/20190630/taxonomy/role/DisclosureOtherAssetsScheduleOfOtherAssetsDetail Other Assets - Schedule of Other Assets (Detail) Details 53 false false R54.htm 100530 - Disclosure - Stockholders' Equity - Common Share Repurchases and Issuances (Detail) Sheet http://www.navient.com/20190630/taxonomy/role/DisclosureStockholdersEquityCommonShareRepurchasesAndIssuancesDetail Stockholders' Equity - Common Share Repurchases and Issuances (Detail) Details 54 false false R55.htm 100540 - Disclosure - Stockholders' Equity - Additional Information (Detail) Sheet http://www.navient.com/20190630/taxonomy/role/DisclosureStockholdersEquityAdditionalInformationDetail Stockholders' Equity - Additional Information (Detail) Details 55 false false R56.htm 100550 - Disclosure - Earnings per Common Share - Schedule of Earnings per Common Share (Detail) Sheet http://www.navient.com/20190630/taxonomy/role/DisclosureEarningsPerCommonShareScheduleOfEarningsPerCommonShareDetail Earnings per Common Share - Schedule of Earnings per Common Share (Detail) Details 56 false false R57.htm 100560 - Disclosure - Earnings per Common Share - Schedule of Earnings per Common Share (Parenthetical) (Detail) Sheet http://www.navient.com/20190630/taxonomy/role/DisclosureEarningsPerCommonShareScheduleOfEarningsPerCommonShareParentheticalDetail Earnings per Common Share - Schedule of Earnings per Common Share (Parenthetical) (Detail) Details 57 false false R58.htm 100570 - Disclosure - Fair Value Measurements - Valuation of Financial Instruments that are Marked-to-Market on Recurring Basis (Detail) Sheet http://www.navient.com/20190630/taxonomy/role/DisclosureFairValueMeasurementsValuationOfFinancialInstrumentsThatAreMarkedToMarketOnRecurringBasisDetail Fair Value Measurements - Valuation of Financial Instruments that are Marked-to-Market on Recurring Basis (Detail) Details 58 false false R59.htm 100580 - Disclosure - Fair Value Measurements - Change in Balance Sheet Carrying Value Associated with Level 3 Financial Instruments Carried at Fair Value on Recurring Basis (Detail) Sheet http://www.navient.com/20190630/taxonomy/role/DisclosureFairValueMeasurementsChangeInBalanceSheetCarryingValueAssociatedWithLevel3FinancialInstrumentsCarriedAtFairValueOnRecurringBasisDetail Fair Value Measurements - Change in Balance Sheet Carrying Value Associated with Level 3 Financial Instruments Carried at Fair Value on Recurring Basis (Detail) Details 59 false false R60.htm 100590 - Disclosure - Fair Value Measurements - Included in Earnings (Detail) Sheet http://www.navient.com/20190630/taxonomy/role/DisclosureFairValueMeasurementsIncludedInEarningsDetail Fair Value Measurements - Included in Earnings (Detail) Details 60 false false R61.htm 100600 - Disclosure - Fair Value Measurements - Unobservable Data Used in Recurring Valuations of Level 3 (Detail) Sheet http://www.navient.com/20190630/taxonomy/role/DisclosureFairValueMeasurementsUnobservableDataUsedInRecurringValuationsOfLevel3Detail Fair Value Measurements - Unobservable Data Used in Recurring Valuations of Level 3 (Detail) Details 61 false false R62.htm 100610 - Disclosure - Fair Value Measurements - Fair Values of Financial Assets and Liabilities, Including Derivative Financial Instruments (Detail) Sheet http://www.navient.com/20190630/taxonomy/role/DisclosureFairValueMeasurementsFairValuesOfFinancialAssetsAndLiabilitiesIncludingDerivativeFinancialInstrumentsDetail Fair Value Measurements - Fair Values of Financial Assets and Liabilities, Including Derivative Financial Instruments (Detail) Details 62 false false R63.htm 100620 - Disclosure - Commitments and Contingencies - Additional Information (Detail) Sheet http://www.navient.com/20190630/taxonomy/role/DisclosureCommitmentsAndContingenciesAdditionalInformationDetail Commitments and Contingencies - Additional Information (Detail) Details 63 false false R64.htm 100630 - Disclosure - Revenue from Contract with Customers Accounted for in Accordance with ASC 606 - Summary of Disaggregation of Revenue from Contracts Accounted Under ASC 606 with Customers (Detail) Sheet http://www.navient.com/20190630/taxonomy/role/DisclosureRevenueFromContractWithCustomersAccountedForInAccordanceWithASC606SummaryOfDisaggregationOfRevenueFromContractsAccountedUnderASC606WithCustomersDetail Revenue from Contract with Customers Accounted for in Accordance with ASC 606 - Summary of Disaggregation of Revenue from Contracts Accounted Under ASC 606 with Customers (Detail) Details 64 false false R65.htm 100640 - Disclosure - Revenue from Contract with Customers Accounted for in Accordance with ASC 606 - Additional Information (Detail) Sheet http://www.navient.com/20190630/taxonomy/role/DisclosureRevenueFromContractWithCustomersAccountedForInAccordanceWithASC606AdditionalInformationDetail Revenue from Contract with Customers Accounted for in Accordance with ASC 606 - Additional Information (Detail) Details 65 false false R66.htm 100650 - Disclosure - Segment Reporting - Additional Information (Detail) Sheet http://www.navient.com/20190630/taxonomy/role/DisclosureSegmentReportingAdditionalInformationDetail Segment Reporting - Additional Information (Detail) Details 66 false false R67.htm 100660 - Disclosure - Segment Reporting - Asset Information for Loans Segment (Detail) Sheet http://www.navient.com/20190630/taxonomy/role/DisclosureSegmentReportingAssetInformationForLoansSegmentDetail Segment Reporting - Asset Information for Loans Segment (Detail) Details 67 false false R68.htm 100670 - Disclosure - Segment Reporting - Segment Results and Reconciliations to GAAP (Detail) Sheet http://www.navient.com/20190630/taxonomy/role/DisclosureSegmentReportingSegmentResultsAndReconciliationsToGAAPDetail Segment Reporting - Segment Results and Reconciliations to GAAP (Detail) Details 68 false false R69.htm 100680 - Disclosure - Segment Reporting - Segment Result and Reconciliations to GAAP - Core Earnings Adjustments (Detail) Sheet http://www.navient.com/20190630/taxonomy/role/DisclosureSegmentReportingSegmentResultAndReconciliationsToGAAPCoreEarningsAdjustmentsDetail Segment Reporting - Segment Result and Reconciliations to GAAP - Core Earnings Adjustments (Detail) Details 69 false false R70.htm 100690 - Disclosure - Segment Reporting - Core Earnings Adjustments to GAAP (Detail) Sheet http://www.navient.com/20190630/taxonomy/role/DisclosureSegmentReportingCoreEarningsAdjustmentsToGAAPDetail Segment Reporting - Core Earnings Adjustments to GAAP (Detail) Details 70 false false R71.htm 100700 - Disclosure - Segment Reporting - Core Earnings Adjustments to GAAP (Parenthetical) (Detail) Sheet http://www.navient.com/20190630/taxonomy/role/DisclosureSegmentReportingCoreEarningsAdjustmentsToGAAPParentheticalDetail Segment Reporting - Core Earnings Adjustments to GAAP (Parenthetical) (Detail) Details 71 false false All Reports Book All Reports navi-10q_20190630.htm navi-20190630.xsd navi-20190630_cal.xml navi-20190630_def.xml navi-20190630_lab.xml navi-20190630_pre.xml navi-ex121_26.htm navi-ex311_54.htm navi-ex312_53.htm navi-ex321_52.htm navi-ex322_51.htm gfvaefeie2jt000001.jpg http://xbrl.sec.gov/dei/2018-01-31 http://fasb.org/srt/2018-01-31 http://xbrl.sec.gov/invest/2013-01-31 http://fasb.org/us-gaap/2018-01-31 true true