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 - Summary of Significant Accounting Policies link:presentationLink link:calculationLink link:definitionLink 75050 - Disclosure - Fair Value of Measurements link:presentationLink link:calculationLink link:definitionLink 75060 - Disclosure - Federal Income Tax Status link:presentationLink link:calculationLink link:definitionLink 75070 - Disclosure - Plan Termination link:presentationLink link:calculationLink link:definitionLink 75080 - Disclosure - Related-Party Transactions and Exempt Party-In-Interest Transactions link:presentationLink link:calculationLink link:definitionLink 75090 - Disclosure - Nonexempt Party-In-Interest Transactions link:presentationLink link:calculationLink link:definitionLink 75100 - Disclosure - Schedule of Assets (Held at End of Year) link:presentationLink link:calculationLink link:definitionLink 75110 - Disclosure - Schedule of Delinquent Participant Contributions link:presentationLink link:calculationLink link:definitionLink 75120 - Disclosure - Significant Accounting Policies (Policies) link:presentationLink link:calculationLink link:definitionLink 75130 - Disclosure - Fair Value of Measurements (Tables) link:presentationLink link:calculationLink link:definitionLink 75140 - Disclosure - Schedule of Assets (Held at End of Year) (Tables) link:presentationLink link:calculationLink link:definitionLink 75150 - Disclosure - Schedule of Delinquent Participant Contributions (Tables) link:presentationLink link:calculationLink link:definitionLink 75160 - Disclosure - Description of Plan - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 75170 - Disclosure - Summary of Significant Accounting Policies - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 75180 - Disclosure - Fair Value Measurements - Summary of Plan"s Investments measured at Fair Value on Recurring Basis (Details) link:presentationLink link:calculationLink link:definitionLink 75190 - Disclosure - Fair Value Measurements - Summary of Plan Investments with Reported NAV (Details) link:presentationLink link:calculationLink link:definitionLink 75200 - Disclosure - Federal Income Tax Status - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 75210 - Disclosure - Related-Party Transactions and Exempt Party-In-Interest Transactions - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 75220 - Disclosure - Nonexempt Party-In-Interest Transactions - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 75230 - Disclosure - Schedule of Assets (Held at End of Year) - Schedule of Assets (Details) link:presentationLink link:calculationLink link:definitionLink 75230 - Disclosure - Schedule of Assets (Held at End of Year) - Schedule of Assets (Details) [Default] link:presentationLink link:calculationLink link:definitionLink 75240 - Disclosure - Schedule of Delinquent Participant Contributions (Details) link:presentationLink link:calculationLink link:definitionLink EBP, Change in Net Asset Available for Benefit, Increase [Abstract] ADDITIONS: EBP, Change in Net Asset Available for Benefit, Decrease from Payment to Participant Benefits paid to participants Employee Benefit Plan, Employer Contribution, Variable Matching Percentage Employee benefit plan, employer contribution, variable matching percentage. Variable matching contribution percentage EBP, Employer, Common Stock, Class B [Member] Class B Common Stock Nonexempt Party-In-Interest Transactions [Abstract] Nonexempt Party-In-Interest Transactions. EBP, Receivable [Abstract] Receivables EBP, Related Party and Party-in-Interest Transactions [Line Items] Document Fiscal Period Focus EBP, Employer Contribution, Receivable Employer contributions EBP, Forfeited Nonvested Account, Decrease from Employer Contribution Employee benefit plan, forfeited account, decrease from employer contribution Employee Benefit Plan, Participant Contribution, Pretax, Maximum of Eligible Compensation, Percentage Employee benefit plan, participant contribution, pretax, maximum of eligible compensation percentage. Employee benefit plan, participant contribution, pretax, maximum of eligible compensation percentage EBP, Tax Status [Abstract] Employee Benefit Plan Nonexempt Party-In-Interest Transactions [Text Block] Employee Benefit Plan Nonexempt Party-In-Interest Transactions. Nonexempt Party-In-Interest Transactions EBP, Forfeited Nonvested Account Employee benefit plan, forfeitures account 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 ON 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, net of revenue sharing EBP, Description of Plan [Line Items] Employee Benefit Plan Schedule of Assets [Text Block] Employee benefit plan schedule of assets. Schedule of Assets (Held at End of Year) EBP, Employer Contribution, Matching Percentage Fixed matching contribution percentage EBP, Investment, Issuer Name [Extensible Enumeration] EBP, Investment, Fair Value and NAV [Abstract] EBP, Accounting Policy [Line Items] Employee Benefit Plan, Contribution Limitations Percentage Employee benefit plan, contribution limitations percentage. Employee benefit plan contribution limitations percentage EBP 005 [Member] EBP 005 EBP 005. Nonexempt Party-In-Interest Transactions [Line Items] Nonexempt Party-In-Interest Transactions. 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, Participant Contribution, Aftertax, Minimum Annual Compensation to Compensation, Percentage Employee benefit plan, participant contribution, aftertax, minimum annual compensation to compensation, percentage. Employee benefit plan, participant contribution, after tax, minimum annual compensation to total compensation, percentage Common Collective Trust [Member] Collective Trust Funds Amendment Flag EBP, Change in Net Asset Available for Benefit, Increase from Employer Contribution, Cash and Noncash EBP, Change in Net Asset Available for Benefit, Increase from Employer Contribution, Cash and Noncash, Total Employer contributions EBP, Change in Net Asset Available for Benefit, Decrease [Abstract] DEDUCTIONS: Employee Benefit Plan, Schedule of Delinquent Participant Contribution [Text Block] Employee benefit plan, schedule of delinquent participant contribution. Schedule of Delinquent Participant Contributions EBP, Note Receivable from Participant, Account, Minimum Borrowing, Amount Employee benefit plan, notes receivable from participant, account, minimum borrowing, amount EBP, Payment to Participant [Policy Text Block] Payments of Benefits EBP, Schedule of Delinquent Participant Contribution [Line Items] Employee Benefit Plan Employer Contribution Variable Matching, Amount Employee benefit plan employer contribution variable matching, amount. Employee benefit plan employer contribution variable matching amount EBP, Schedule of Asset Held for Investment [Line Items] Fair Value Hierarchy and NAV [Axis] EBP, Employer, Common Stock Fund [Member] Common Stock EBP, Investment, Current Value, Type [Extensible Enumeration] Investment Type [Axis] Employee Benefit Plan, Employer Contribution, Additional Variable Matching Percentage Employee benefit plan, employer contribution, additional variable matching percentage. Additional variable matching contribution percentage Employee Benefit Plan, Participant Contribution, Aftertax, Maximum Annual Compensation to Compensation, Percentage Employee benefit plan, participant contribution, aftertax, maximum annual compensation to compensation, percentage. Employee benefit plan, participant contribution, after tax, maximum annual compensation to total compensation, percentage Document Type EBP, Participant-Directed [Member] Participant-directed investments Entity Central Index Key EBP, Investment [Policy Text Block] Investment Valuation and Income Recognition EBP, Contribution, Participating Employer [Axis] EBP, Accounting Policy [Table] EBP, Basis of Accounting [Policy Text Block] Basis of Accounting Salaried Employees and Non-union Hourly Employees. Salaried Employees and Non-union Hourly Employees Salaried Employees and Non-union Hourly Employees [Member] EBP, Description of Plan [Table] EBP, Participant-Directed and Nonparticipant-Directed Status [Axis] EBP, Change in Net Asset Available for Benefit, Increase from Interest and Dividend Income on Investment Interest and dividend income EBP, Change in Net Asset Available for Benefit, Increase from Interest and Dividend Income on Investment, Total Dividends and interest EBP, Investment, Excluding Plan Interest in Master Trust, Cost Amount of shares held EBP, Investment, Number of Shares Number of shares held Summary of Plan Investments with Reported NAV [Table Text Block] Summary of plan investments with reported NAV. Summary of Plan Investments with Reported NAV Minimum [Member] Minimum EBP, Related Party and Party-in-Interest Transactions [Text Block] Related-Party Transactions and Exempt Party-In-Interest Transactions EBP, Change in Net Asset Available for Benefit, Increase Total additions EBP, Change in Net Asset Available for Benefit, Increase from Contribution Total contributions EBP, Investment Sold, Excluding Plan Interest in Master Trust, Selling Price Master trust recorded sales amount Sales amount EBP, Expense [Policy Text Block] Administrative Expenses Fair Value Measured at Net Asset Value Per Share [Member] Fair Value Measured at NAV Per Share EBP, Statement of Net Asset Available for Benefit [Abstract] EBP, Change in Net Asset Available for Benefit, Increase from Participant Contribution, Excluding Rollover Participant contributions Employee Benefit Plan Schedule of Delinquent Participant Contribution Corrected Thru VFCP Employee benefit plan schedule of delinquent participant contribution corrected Thru VFCP Contributions Corrected thru VFCP Fair Value, Inputs, Level 1, Level 2, and Level 3 [Member] Level 1, Level 2 and Level 3 EBP, Change in Net Asset Available for Benefit, Increase from Contribution [Abstract] CONTRIBUTIONS: EBP, Tax Determination Letter, Date Tax determination letter, date EBP, Participant Contribution, Automatic, Deferral Rate Employee benefit plan participant contribution, automatic, deferral rate EBP, Contribution, Participating Employer [Domain] EBP, Related Party and Party-in-Interest Transactions [Abstract] EBP, Investment, Excluding Plan Interest in Master Trust, Fair Value EBP, Investment, Excluding Plan Interest in Master Trust, Fair Value, Ending Balance EBP, Investment, Excluding Plan Interest in Master Trust, Fair Value, Beginning Balance EBP, Investment, Excluding Plan Interest in Master Trust, Fair Value, Total Total investments at fair value Investments 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 Purchases amount EBP, Summary of Accounting Policy [Text Block] Summary of 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] 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] EBP, Risk and Uncertainty [Policy Text Block] Risks and Uncertainties EBP, Tax Determination Letter, Obtained [true false] Tax determination letter, obtained EBP, Related Party and Party-in-Interest Transactions [Table] EBP, Plan Termination [Text Block] Plan Termination Employee Benefit Plan, Annual Fees Per Participant Employee benefit plan, annual fees per participant. Employee benefit plan, annual fees per participant. Employee benefit plan, notes receivable from participants loan term Employee Benefit Plan, Notes Receivable from Participants Loan Term Employee benefit plan, notes receivable from participants loan term. EBP, Participant-Directed and Nonparticipant-Directed Status [Domain] EBP, Schedule of Delinquent Participant Contribution, Corrected Total Fully Corrected Under VFCP and PTE 2002-51 Cover [Abstract] Investments [Domain] INVESTMENT INCOME: EBP, Change in Net Asset Available for Benefit, Increase (Decrease) from Income (Loss) on Investment [Abstract] EBP, Net Asset Available for Benefit End of year Beginning of year Net assets available for benefits from the financial statements NET ASSETS AVAILABLE FOR BENEFITS 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 measured at Fair Value on Recurring Basis Employee Benefit Plan, Minimum Participants With Vested Balances Employee benefit plan, minimum participants with vested balances. Employee benefit plan, minimum participants with vested balances EBP, Net Asset Available for Benefit [Abstract] NET ASSETS AVAILABLE FOR BENEFITS: EBP, Schedule of Asset Held for Investment [Abstract] EBP, Asset Held for Investment, Plan Interest in Master Trust, Participation Status [Extensible Enumeration] Participant contributions and loan payments Participant contributions and loan payments Employee benefit plan participant contribution vesting description. Employee Benefit Plan Participant Contribution Vesting Description Employee benefit plan contribution vesting description EBP, Note Receivable from Participant [Policy Text Block] Notes Receivable from Participants EBP, Schedule of Asset Held for Investment [Table Text Block] Schedule of Assets EBP, Investment, Purchased, Number of Shares Purchases of shares EBP, Statement of Net Asset Available for Benefit [Table] Document Fiscal Year Focus EBP, Change in Net Asset Available for Benefit, Increase (Decrease) from Gain (Loss) on Investment EBP, Change in Net Asset Available for Benefit, Increase (Decrease) from Gain (Loss) on Investment, Total Net appreciation in fair value of investments EBP, Employer Contribution, Participant Compensation Matched, Percentage Percentage on employee eligible compensation Common Stock and Money Market Fund [Member] Common Stock and Money Market Fund. Common Stock and Money Market Fund EBP, Statement of Change in Net Asset Available for Benefit [Table] Employee benefit plan note receivable from participant interest rate. Employee Benefit Plan Note Receivable From Participant Interest Rate Employee benefit plan note receivable from participant interest rate Contributions EBP, Contribution [Policy Text Block] Employee Benefit Plan Note Receivable From Participant Prime Rate Employee benefit plan note receivable from participant prime rate. Employee benefit plan, note receivable from participant prime rate EBP, Schedule of Delinquent Participant Contribution [Abstract] EBP, Participant Contribution, Pretax, Maximum Annual Compensation to Total Compensation, Percentage Employee benefit plan, participant contribution, pre-tax, maximum annual compensation to total compensation, percentage Money Market Funds [Member] Money Market Fund EBP, Plan Number EBP, Investment, Fair Value and NAV [Line Items] Legal Entity [Axis] EBP, Plan Name Nonexempt Party-In-Interest Transactions [Table] Nonexempt Party-In-Interest Transactions. EBP, Asset [Abstract] ASSETS EBP, Change in Net Asset Available for Benefit, Increase (Decrease) from Income (Loss) on Investment Plan interest in BNSF 401(k) Plans Master Trust investment income (Note 4) Total investment income Employee Benefit Plan Fair Value Investment Net Asset Value Redemption Frequency Employee benefit plan fair value investment net asset value redemption frequency. Redemption Frequency Employee Benefit Plan, Participant Contribution, Pretax, Minimum Annual Compensation to Compensation, Percentage Employee benefit plan, participant contribution, pretax, minimum annual compensation to compensation, percentage. Employee Benefit Plan Participant Contribution Pre taxMinimumAnnualCompensationToTotalCompensationPercentage Employee benefit plan, participant contribution, pre tax, minimum annual compensation to total compensation, percentage EBP, Investment, Fair Value and NAV [Table] Rollover contributions EBP, Change in Net Asset Available for Benefit, Increase from Participant Contribution, Rollover EBP, Accounting Policy, Accounting Standard Update, and Change in Accounting Principle [Abstract] EBP, Asset Held for Investment TOTAL EBP, Tax Status [Text Block] Federal Income Tax Status EBP, Investment, Sold, Number of Shares Sales of shares EBP, Schedule of Delinquent Participant Contribution, Not Corrected Contributions Not Corrected Maximum [Member] Maximum Statistical Measurement [Axis] EBP, Statement of Change in Net Asset Available for Benefit [Abstract] EBP, Schedule of Delinquent Participant Contribution, Corrected Outside VFCP Contributions Corrected Outside VFCP Entity Registrant Name Employee Benefit Plan, Participant Contribution in Pretax and Roth Contributions Percentage Employee benefit plan, participant contribution in pre-tax and roth contributions percentage. Employee benefit plan, participant contribution in pre-tax and roth contributions percentage EBP, Receivable Total receivables EBP, Asset Held for Investment, Participant Loan, Interest Rate Employee benefit plan, asset held for investment, participant loan, interest rate Employee Benefit Plan Participant Loan Maturity Year Employee benefit plan participant loan maturity year. Employee benefit plan, asset held for investment, participant loan, maturity year Employee Benefit Plan, Minimum Amount Per Non Hardship in Service Withdrawal Employee benefit plan, minimum amount per non-hardship in-service withdrawal. Employee benefit plan, minimum amount per non-hardship in-service withdrawal EBP, Schedule of Delinquent Participant Contribution [Table Text Block] Schedule of Delinquent Participant Contributions Union Hourly Employees Union Hourly Employees Union Hourly Employees [Member] Redemption Notice Period Employee Benefit Plan Fair Value Investment Net Asset Value Redemption Notice Period Employee benefit plan fair value investment net asset value redemption notice period. Employee Benefit Plan, Revenue Credits Employee benefit plan, revenue credits. Employee benefit plan, revenue credits Employee Benefit Plan, Plan Held Float Income Amount Employee benefit plan, plan held float income amount. Employee benefit plan, plan held float income amount Employee Benefit Plan, Notes Receivable from Participants Loan to Purchase Primary Residence Term Employee benefit plan, notes receivable from participants loan to purchase primary residence term. Employee benefit plan, notes receivable from participants loan to purchase primary residence term EBP, Change in Net Asset Available for Benefit, Decrease Total deductions EBP, Schedule of Delinquent Participant Contribution [Table] Employee Benefit Plan Number of Service in Vesting of Employer Contribution Period Employee benefit plan number of service in vesting of employer contribution period. Years of vesting service Fair Value, Inputs, Level 1 [Member] Active Markets for Identical Assets (Level 1) 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 INCREASE IN NET ASSETS EBP, Tax Status [Table] EBP, Asset Held for Investment, Party-in-Interest [true false] Baillie Gifford International Alpha K. Vanguard Federal Money Market VMMR [Member] Janus Henderson Triton N [Member] Vanguard Windsor II Fund Admiral. Fidelity Small Cap Index. BlackRock Inflation Protected Institutional. Fidelity OTC Pool Class A. Fidelity US Bond Index. T. Rowe Price Retirement 2005 F. PIMCO High Yield Institutional Class [Member] Fidelity Small Cap Index [Member] Janus Henderson Triton N. T. Rowe Price Retirement 2050 F. American Beacon Fund Small Cap Value R5. T. Rowe Price Retirement 2045 F. Dodge & Cox Income Class X [Member] American Funds New World R6. T. Rowe Price Retirement 2030 F. T. Rowe Price Retirement 2055 F. T. Rowe Price Retirement 2065 F. Fidelity Total International Index [Member] Vanguard Windsor II Fund Admiral [Member] T. Rowe Price Retirement 2045 F [Member] Fidelity 500 Index. T. Rowe Price Retirement 2035 F [Member] T. Rowe Price Retirement 2040 F [Member] T. Rowe Price Retirement 2020 F. T. Rowe Price Retirement 2060 F. Berkshire Hathaway B Unitized. T. Rowe Price Retirement 2020 F [Member] T. Rowe Price Retirement 2040 F. Fidelity 500 Index [Member] T. Rowe Price Retirement 2050 F [Member] T. Rowe Price Retirement 2055 F [Member] Fidelity US Bond Index [Member] T. Rowe Price Retirement 2030 F [Member] T. Rowe Price Retirement 2005 F [Member] T. Rowe Price Retirement 2025 F [Member] T. Rowe Price Retirement 2035 F. PIMCO High Yield Institutional Class. Berkshire Hathaway B Unitized [Member] BlackRock Inflation Protected Institutional [Member] Fidelity Mid Cap Index. Fidelity Short-Term Bond Index [Member] Fidelity Total International Index. Fidelity Mid Cap Index [Member] T. Rowe Price Retirement 2010 F. T. Rowe Price Retirement 2065 F [Member] T. Rowe Price Retirement 2015 F. T. Rowe Price Retirement 2025 F. Dodge & Cox Income Class X. T. Rowe Price Retirement 2010 F [Member] Baillie Gifford International Alpha K [Member] T. Rowe Price Retirement 2060 F [Member] T. Rowe Price Retirement 2015 F [Member] Fidelity Short-Term Bond Index. American Beacon Fund Small Cap Value R5 [Member] American Funds New World R6 [Member] Fidelity OTC Pool Class A [Member] Fidelity Low Priced Stock Fund K6 [Member] Fidelity Low Priced Stock Fund K6. Vanguard Federal Money Market VMMR.