75000 - Document - Document and Entity Information link:presentationLink link:calculationLink link:definitionLink 75010 - Statement - Statements of Net Assets Available for Benefits link:presentationLink link:calculationLink link:definitionLink 75020 - Statement - Statement of Changes in Net Assets Available For Benefits link:presentationLink link:calculationLink link:definitionLink 75030 - Disclosure - Description of Plan link:presentationLink link:calculationLink link:definitionLink 75040 - Disclosure - Significant Accounting Policies link:presentationLink link:calculationLink link:definitionLink 75050 - Disclosure - Fair Value of Measurements link:presentationLink link:calculationLink link:definitionLink 75060 - Disclosure - Investment in Master Trust link:presentationLink link:calculationLink link:definitionLink 75070 - Disclosure - Related Party and Party-in-Interest Transactions link:presentationLink link:calculationLink link:definitionLink 75080 - Disclosure - Income Tax Status link:presentationLink link:calculationLink link:definitionLink 75090 - Disclosure - Reconciliation of Financial Statements to Form 5500 link:presentationLink link:calculationLink link:definitionLink 75100 - Disclosure - Schedule of Assets (Held at End of Year) link:presentationLink link:calculationLink link:definitionLink 75110 - Disclosure - Significant Accounting Policies (Policies) link:presentationLink link:calculationLink link:definitionLink 75120 - Disclosure - Description of Plan (Tables) link:presentationLink link:calculationLink link:definitionLink 75130 - Disclosure - Fair Value of Measurements (Tables) link:presentationLink link:calculationLink link:definitionLink 75140 - Disclosure - Investment in Master Trust (Tables) link:presentationLink link:calculationLink link:definitionLink 75150 - Disclosure - Reconciliation OF Financial Statements to Form 5500 (Tables) link:presentationLink link:calculationLink link:definitionLink 75160 - Disclosure - Schedule of Assets (Held at End of Year) (Tables) link:presentationLink link:calculationLink link:definitionLink 75170 - Disclosure - Description of Plan - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 75180 - Disclosure - Description of Plan - Schedule of Matching Contributions Fully Vested (Details) link:presentationLink link:calculationLink link:definitionLink 75190 - Disclosure - Description of Plan - Schedule of Matching Contributions Fully Vested (Parenthetical) (Details) link:presentationLink link:calculationLink link:definitionLink 75200 - Disclosure - Fair Value Measurements - Summary of Plan"s Investments at Fair and Contact Value Based on Valuation Inputs (Details) link:presentationLink link:calculationLink link:definitionLink 75210 - Disclosure - Investment in Master Trust - Schedule of Total of Investments in Master Trust (Details) link:presentationLink link:calculationLink link:definitionLink 75220 - Disclosure - Investment in Master Trust - Schedule of Investment Income for Master Trust (Details) link:presentationLink link:calculationLink link:definitionLink 75230 - Disclosure - Investment in Master Trust - Schedule of Investment Income for Master Trust (Details) 2 link:presentationLink link:calculationLink link:definitionLink 75240 - Disclosure - Related Party and Party-in-Interest Transactions - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 75250 - Disclosure - Income Tax Status - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 75260 - Disclosure - Reconciliation OF Financial Statements to Form 5500 - Summary of Reconciliation of Net Assets Available for Benefits from the Financial Statements to the Form 5500 (Details) link:presentationLink link:calculationLink link:definitionLink 75270 - Disclosure - Reconciliation OF Financial Statements to Form 5500 - Summary of Reconciliation of Change in Net Assets Available for Benefits from Financial Statements to Form 5500 (Details) link:presentationLink link:calculationLink link:definitionLink 75280 - Disclosure - Schedule of Assets (Held at End of Year) - Schedule of Assets (Details) link:presentationLink link:calculationLink link:definitionLink 75280 - Disclosure - Schedule of Assets (Held at End of Year) - Schedule of Assets (Details) [Default] link:presentationLink link:calculationLink link:definitionLink EBP, Change in Net Asset Available for Benefit, Increase [Abstract] Additions to net assets: EBP, Change in Net Asset Available for Benefit, Decrease from Payment to Participant Benefit payments to participants EBP, Employer, Common Stock, Class B [Member] Class B Common Stock Employee Benefit Plan Mandatory Lump Sum Distributions Transferred to Individual Retirement Account Employee benefit plan mandatory lump sum distributions transferred to individual retirement account. Employee benefit plan mandatory lump sum distributions transferred to individual retirement account EBP, Reconciliation to Form 5500, Change in Net Asset Available for Benefit, Current Period, Decrease from Deemed Distribution Deemed distributions of participant loans for the current year Deemed distributions of participant loans for the current year EBP, Master Trust [Table Text Block] Schedule of Total of Investments in Master Trust EBP, Receivable [Abstract] Receivables Fair Value, Inputs, Level 2 [Member] Level 2 Inputs EBP, Related Party and Party-in-Interest Transactions [Line Items] Document Fiscal Period Focus EBP, Master Trust [Line Items] Mutual Funds EBP, Investment, Contract Value EBP, Investment, Contract Value, Total Investments measured at contract value Investment in BNSF 401(k) Plans Master Trust relating to fully benefit-responsive contracts (Note 4) EBP, Form 5500 Caption, Net Income (Loss) EBP, Form 5500 Caption, Net Income (Loss), Total Net increase in net assets available for benefits per the Form 5500 EBP, Tax Status [Abstract] EBP, Forfeited Nonvested Account Employee benefit plan, unused forfeited balances EBP, Description of Plan [Text Block] Description of Plan EBP, Change in Net Asset Available for Benefit, Increase from Interest Income on Note Receivable from Participant Interest income from notes receivable from participants Investment, Identifier [Axis] EBP, Change in Net Asset Available for Benefit, Decrease from Administrative Expense Administrative expenses paid on behalf of the plan Administrative expenses EBP, Description of Plan [Line Items] Employee Benefit Plan Participant Loan Years of Maturity Employee benefit plan participant loan years of maturity. Employee benefit plan participant loan, years of maturity EBP, Master Trust [Abstract] EBP, Employer Contribution, Matching Percentage Matching contribution percentage EBP, Investment, Issuer Name [Extensible Enumeration] EBP, Investment, Fair Value and NAV [Abstract] EBP, Liability [Abstract] LIABILITIES EBP, Accounting Policy [Line Items] EBP, Change in Net Asset Available for Benefit, Transfer to (from) Plan Asset transfers to other plans, net Asset transfers to other plans, net Net investment appreciation EBP, Master Trust [Table] EBP, Schedule of Asset Held for Investment [Table] EBP, Statement of Net Asset Available for Benefit [Line Items] EBP, Note Receivable from Participant, Account, Maximum Borrowing, Amount Employee benefit plan, notes receivable from participant, account, maximum borrowing, amount Employee Benefit Plan Tranche One [Member] Employee benefit plan tranche one. Less than 1 Year Employee Benefit Plan Percentage of Investment Income from Master Trust Employee benefit plan percentage of investment income from master trust. Plan's percentage of investment income from the Master Trust Common Collective Trust [Member] Common / Collective Trusts Amendment Flag EBP, Change in Net Asset Available for Benefit, Increase from Employer Contribution, Cash and Noncash, Total EBP, Change in Net Asset Available for Benefit, Increase from Employer Contribution, Cash and Noncash Employer Deductions from net assets EBP, Change in Net Asset Available for Benefit, Decrease [Abstract] EBP, Note Receivable from Participant, Account, Minimum Borrowing, Amount Employee benefit plan, notes receivable from participant, account, minimum borrowing, amount Benefit Payments to Participants EBP, Payment to Participant [Policy Text Block] EBP, Master Trust [Policy Text Block] Transfers EBP, Schedule of Asset Held for Investment [Line Items] Fair Value Hierarchy and NAV [Axis] EBP, Nonconsolidated, Master Trust and Plan Interest in Master Trust [Domain] EBP, Employer, Common Stock Fund [Member] Company Stock Fund Investment Type [Axis] EBP, Investment, Fair Value EBP, Investment, Fair Value, Total Total investments measured at fair value Investment in BNSF 401(k) Plans Master Trust (Note 4) Document Type Entity Central Index Key EBP, Investment [Policy Text Block] Income Recognition EBP, Reconciliation to Form 5500, Change in Net Asset Available for Benefit, Prior Period, Increase from Deemed Distribution Deemed distributions of participant loans for the prior year EBP, Accounting Policy [Table] EBP, Basis of Accounting [Policy Text Block] Basis of Accounting Employee Benefit Plan Forfeited Nonvested Amount Used to Offset Employer Matching Contributions Employee benefit plan forfeited nonvested amount used to offset employer matching contributions. Employee benefit plan forfeited nonvested amount used to offset employer matching contributions EBP, Investment, Plan Interest in Master Trust, Fair Value Total investments at fair value Investment in BNSF 401(k) Plans Master Trust (Note 4) EBP, Description of Plan [Table] 1 Year but Less than 2 Years Employee Benefit Plan Tranche Two [Member] Employee Benefit Plan tranche two. EBP, Change in Net Asset Available for Benefit, Increase from Interest and Dividend Income on Investment EBP, Change in Net Asset Available for Benefit, Increase from Interest and Dividend Income on Investment, Total Interest and dividend income Employee Benefit Plan Tranche Six [Member] Employee benefit plan tranche six. 5 Years Or More EBP, Investment, Fair Value [Abstract] Investments, at fair value: Investment in BNSF 401(k) Plans Master Trust (Note 4) EBP, Investment, Fair and Contract Value Total investments EBP, Form 5500 Caption, Net Assets Net assets available for benefits from the Form 5500 Net assets available for benefits from the Form 5500 EBP, Change in Net Asset Available for Benefit, Increase (Decrease) from Investment Income (Loss), before Investment Expense Total Minimum [Member] Minimum EBP, Related Party and Party-in-Interest Transactions [Text Block] Related Party and Party-in-Interest Transactions EBP, Change in Net Asset Available for Benefit, Increase Total additions to net assets EBP, Change in Net Asset Available for Benefit, Increase from Contribution Total contributions Employee Benefit Plan Tranche Five [Member] Employee benefit plan tranche five. 4 Years but Less than 5 Years Employee Benefit Plan Tranche Three [Member] Employee benefit plan tranche three. 2 Years but Less than 3 Years EBP, Investment Sold, Excluding Plan Interest in Master Trust, Selling Price Master trust recorded sales amount EBP, Reconciliation of Financial Statement to Form 5500 [Line Items] EBP, Contribution [Table Text Block] Schedule of Matching Contributions become Fully Vested Employee Benefit Plan Participant Maximum Annual Contribution Amount Employee benefit plan participant maximum annual contribution amount. Employee benefit plan participant maximum annual contribution amount Document Information [Line Items] EBP, Statement of Net Asset Available for Benefit [Abstract] EBP, Change in Net Asset Available for Benefit, Increase from Contribution [Abstract] Contributions: EBP, Tax Determination Letter, Date Tax determination letter, date EBP, Related Party and Party-in-Interest Transactions [Abstract] EBP, Use of Estimate [Policy Text Block] Use of Estimates Mutual Fund [Member] Mutual Funds Entity [Domain] EBP, Investment Acquired, Excluding Plan Interest in Master Trust, Cost Master trust recorded purchases amount Employee Benefit Plan Maximum Annual Catch Up Contribution Limit Amount Employee benefit plan maximum Annual catch up contribution limit amount. Employee benefit plan maximum annual catch-up contributions limit amount EBP, Summary of Accounting Policy [Text Block] Significant Accounting Policies EBP, Investment, Fair Value and NAV [Text Block] Fair Value Measurements Employee Benefit Plan Vested Percentage Employee benefit plan vested percentage. Vest percentage EBP, Description of Plan and Accounting Change [Abstract] Reconciliation of Net Assets EBP, Reconciliation of Financial Statement to Form 5500 [Table Text Block] Employee Benefit Plan Administrative Expenses Employee benefit plan administrative expenses. Administrative expenses paid on behalf of plan EBP, Asset Held for Investment, Participant Loan, after Deemed Distribution Notes receivable from participants EBP, Statement of Change in Net Asset Available for Benefit [Line Items] Statistical Measurement [Domain] EBP, Note Receivable from Participant Notes receivable from participants Document Period End Date Fair Value Hierarchy and NAV [Domain] Risks and Uncertainties EBP, Risk and Uncertainty [Policy Text Block] EBP, Note Receivable from Participant, Account, Maximum Borrowing, to Total Account, Percentage Employee benefit plan, note receivable from participant, account, maximum borrowing, to total account, percentage EBP, Tax Determination Letter, Obtained [true false] Tax determination letter, obtained EBP, Related Party and Party-in-Interest Transactions [Table] Employee Benefit Plan Maximum Annual Compensation Limitation Percentage Employee benefit plan maximum annual compensation limitation percentage. Employee benefit plan maximum annual compensation limitation percentage EBP, Participant Contribution, Pretax, Maximum Annual Compensation, Amount Employee benefit plan, participant contribution, pretax, maximum annual compensation, amount Cover [Abstract] Employee benefit plan note receivable from participant variable rate Employee Benefit Plan Note Receivable from Participant Variable Rate Employee benefit plan note receivable from participant variable rate. Investments [Domain] EBP, Master Trust [Text Block] Investment in Master Trust EBP, Net Asset Available for Benefit Net assets available for benefits from the financial statements NET ASSETS AVAILABLE FOR BENEFITS Beginning of year End of year EBP, Asset Held for Investment, Plan Interest in Master Trust, Current Value Current Value EBP, Investment, Fair Value and NAV [Table Text Block] Summary of Plan"s Investments at Fair and Contact Value Based on Valuation Inputs Employee Benefit Plan Asset Liability For Uncertain Tax Positions Amount recognized for uncertainty in income taxes positions taken or expected to be taken classified as an asset (liability) for employee stock purchase, saving, or similar plan (employee benefit plan (EBP)). (Asset) Liability For Uncertain Tax Positions Employee Benefit Plan Tranche Four [Member] Employee benefit plan tranche four. 3 years but less than 4 years EBP, Net Asset Available for Benefit [Abstract] Net assets available for benefits: EBP, Schedule of Asset Held for Investment [Abstract] EBP, Excess Contribution Payable Contributions owed to participants EBP, Asset Held for Investment, Plan Interest in Master Trust, Participation Status [Extensible Enumeration] Employee Benefit Plan Participant Contribution Vesting Description Employee benefit plan participant contribution vesting description. Employee benefit plan contribution vesting description Burlington Northern Santa Fe, LLC [Member] Burlington Northern Santa Fe, LLC. BNSF EBP, Schedule of Asset Held for Investment [Table Text Block] Schedule of Assets Employee Benefit Plan Minimum Number of Work Hours in which Participant is Compensated Employee benefit plan minimum number of work hours in which participant is compensated. Employee benefit plan minimum number of work hours in which participant is compensated EBP, Statement of Net Asset Available for Benefit [Table] Document Fiscal Year Focus Employee Benefit Plan Employer Contribution Vested Percentage Employee benefit plan employer contribution vested percentage. Vested Percentage EBP, Nonconsolidated, Master Trust [Member] Master Trust EBP, Employer Contribution, Participant Compensation Matched, Percentage Percentage on employee eligible compensation EBP, Investment, Plan Interest in Master Trust, Fair and Contract Value Total investments EBP, Statement of Change in Net Asset Available for Benefit [Table] EBP, Reconciliation to Form 5500, Net Asset Available for Benefit, Allocation to Withdrawing Participant, Not yet Paid Participant loans reduced by deemed distributions in prior years and currently outstanding EBP, Investment, Contract Value [Abstract] Investments, at contract value: EBP, Asset Total assets Employee Benefit Plan Vesting [Axis] Employee benefit plan vesting [Axis] EBP, Plan Number Plan's Investment EBP, Nonconsolidated, Plan Interest in Master Trust [Member] EBP, Investment, Fair Value and NAV [Line Items] Document Information [Table] Legal Entity [Axis] EBP, Plan Name EBP, Reconciliation to Form 5500, Net Asset Available for Benefit, Deemed Distribution Participant loans reduced by current year deemed distributions EBP, Interest in Master Trust, Percentage Plans's Percentage of Investment in Master Trust Net Assets EBP, Asset [Abstract] ASSETS EBP, Change in Net Asset Available for Benefit, Increase (Decrease) from Income (Loss) on Investment Total Plan interest in BNSF 401(k) Plans Master Trust investment income (Note 4) Employee Benefit Plan Participant Maximum Annual Contribution including Catch Up Contributions Amount Employee benefit plan participant maximum annual contribution including catch up contributions amount. Employee benefit plan participant maximum annual contribution including catch up contributions amount EBP, Investment, Fair Value and NAV [Table] Employee Benefit Plan Vesting [Domain] Employee benefit plan vesting. EBP, Accounting Policy, Accounting Standard Update, and Change in Accounting Principle [Abstract] EBP, Asset Held for Investment Total assets held for investment purposes EBP, Reconciliation of Financial Statement to Form 5500 [Table] EBP, Tax Status [Text Block] Income Tax Status EBP, Nonconsolidated, Master Trust and Plan Interest in Master Trust [Axis] Maximum [Member] Maximum Employee Benefit Plan Maximum Annual Compensation Limitation Amount Employee benefit plan maximum annual compensation limitation amount. Employee benefit plan maximum annual compensation limitation amount Statistical Measurement [Axis] EBP, Statement of Change in Net Asset Available for Benefit [Abstract] Employee Benefit Plan Number of years of Service in Vesting of Employer Contribution Employee benefit plan number of years of service in vesting of employer contribution. Years of vesting service Entity Registrant Name EBP 002 [Member] EBP 002. EBP 002 EBP, Asset Held for Investment, Participant Loan, Interest Rate Employee benefit plan, asset held for investment, participant loan, interest rate Employee Benefit Plan Schedule of Assets Held at End of Year [TextBlock] Employee benefit plan schedule of assets held at end of year. Schedule of Assets (Held at End of Year) EBP, Reconciliation of Financial Statement to Form 5500 [Text Block] Reconciliation of Financial Statements to Form 5500 Employee Benefit Plan Investment Income for Master Trust [Table Text Block] Employee benefit plan investment income for master trust. Schedule of Investment Income for Master Trust Employee Benefit Plan Percentage of Participant Account in Stock Fund Employee benefit plan percentage of participant account in stock fund. Employee benefit plan percentage of participant account in stock fund Employee Benefit Plan Participant Maximum Annual Compensation Percentage Employee benefit plan participant maximum annual compensation percentage. Employee benefit plan participant maximum annual compensation percentage EBP, Related Party and Party-in-Interest [Domain] EBP, Related Party and Party-in-Interest [Axis] EBP, Reconciliation of Financial Statement to Form 5500 [Abstract] Total deductions from net assets EBP, Change in Net Asset Available for Benefit, Decrease EBP, Investment, Plan Interest in Master Trust, Contract Value Investments at contract value Investment in BNSF 401(k) Plans Master Trust relating to fully benefit-responsive contracts (Note 4) Investment in BNSF 401(k) Plans Master Trust relating to fully benefit-responsive contracts (Note 4) Fair Value, Inputs, Level 1 [Member] Level 1 Inputs Employee Benefit Plan Immediate Lump Sum Distributions Transferred to Individual Retirement Account Employee benefit plan immediate lump sum distributions transferred to individual retirement account. Employee benefit plan immediate lump sum distributions transferred to individual retirement account EBP, Change in Net Asset Available for Benefit, Increase from Participant Contribution EBP, Change in Net Asset Available for Benefit, Increase from Participant Contribution, Total Participant EBP, Tax Status [Line Items] Entity Tax Identification Number EBP, Change in Net Asset Available for Benefit, Increase (Decrease) Net increase in net assets available for benefits per the financial statements Net increase in net assets EBP, Tax Status [Table] EBP, Asset Held for Investment, Party-in-Interest [true false] BNSF 401(k) Plans Master Trust. BNSF 401(k) Plans Master Trust [Member]