v3.26.1
Schedule of Assets (Held at End of Year) - Schedule of Assets (Details) - EBP 003
12 Months Ended
Dec. 31, 2025
USD ($)
EBP, Schedule of Asset Held for Investment [Line Items]  
Entity Tax Identification Number 34-0367600
EBP, Plan Number 003
Notes receivable from participants $ 20,426,375
Total assets held for investment purposes 1,589,325,674
Investment, Identifier [Axis]: Artisan International Small-Mid Artisan International Small-Mid  
EBP, Schedule of Asset Held for Investment [Line Items]  
Current Value $ 11,079,054
EBP, Investment, Issuer Name [Extensible Enumeration] Artisan International Small-Mid [Member]
EBP, Investment, Current Value, Type [Extensible Enumeration] Artisan International Small-Mid [Member]
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Investment, Identifier [Axis]: Baird Aggregate Bond Fund Baird Aggregate Bond Inst.  
EBP, Schedule of Asset Held for Investment [Line Items]  
Current Value $ 90,648,128
EBP, Investment, Issuer Name [Extensible Enumeration] Baird Aggregate Bond Fund [Member]
EBP, Investment, Current Value, Type [Extensible Enumeration] Baird Aggregate Bond Fund Class Institutional [Member]
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Investment, Identifier [Axis]: Berkshire Hathaway Class B Stock Fund Berkshire Hathaway Class B Stock Fund  
EBP, Schedule of Asset Held for Investment [Line Items]  
Current Value $ 100,972,202
EBP, Investment, Issuer Name [Extensible Enumeration] Berkshire Hathaway Class B Stock Fund [Member]
EBP, Investment, Current Value, Type [Extensible Enumeration] Berkshire Hathaway Class B Common Stock Fund [Member]
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
EBP, Asset Held for Investment, Party-in-Interest [true false] true
Investment, Identifier [Axis]: DFA Emerging Markets Core Equity 2 DFA Emerging Markets Core Equity 2  
EBP, Schedule of Asset Held for Investment [Line Items]  
Current Value $ 7,154,491
EBP, Investment, Issuer Name [Extensible Enumeration] DFA Emerging Markets Core Equity 2 [Member]
EBP, Investment, Current Value, Type [Extensible Enumeration] DFA Emerging Markets Core Equity 2 [Member]
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Investment, Identifier [Axis]: Federated Hermes MDT Mid Cap Growth Federated Hermes MDT Mid Cap Growth CL P  
EBP, Schedule of Asset Held for Investment [Line Items]  
Current Value $ 30,566,769
EBP, Investment, Issuer Name [Extensible Enumeration] Federated Hermes MDT Mid Cap Growth [Member]
EBP, Investment, Current Value, Type [Extensible Enumeration] Federated Hermes MDT Mid Cap Growth CL P [Member]
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Investment, Identifier [Axis]: Fidelity Advisor® Diversified Intl Fidelity Advisor® Diversified Intl  
EBP, Schedule of Asset Held for Investment [Line Items]  
Current Value $ 33,692,883
EBP, Investment, Issuer Name [Extensible Enumeration] Fidelity Advisor Diversified Intl [Member]
EBP, Investment, Current Value, Type [Extensible Enumeration] Fidelity Advisor Diversified Intl [Member]
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Investment, Identifier [Axis]: Goldman Sachs Asset Management Interest-bearing cash  
EBP, Schedule of Asset Held for Investment [Line Items]  
Current Value $ 3,099,392
EBP, Investment, Issuer Name [Extensible Enumeration] Goldman Sachs Asset Management [Member]
EBP, Investment, Current Value, Type [Extensible Enumeration] Stable Value Fund Interest-bearing Cash [Member]
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Investment, Identifier [Axis]: Goldman Sachs Asset Management Stable Value Fund: Synthetic GICs  
EBP, Schedule of Asset Held for Investment [Line Items]  
Current Value $ 121,066,889
EBP, Investment, Issuer Name [Extensible Enumeration] Goldman Sachs Asset Management [Member]
EBP, Investment, Current Value, Type [Extensible Enumeration] Synthetic GICs [Member]
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Investment, Identifier [Axis]: Hartford Small Cap Growth Hartford Small Cap Growth  
EBP, Schedule of Asset Held for Investment [Line Items]  
Current Value $ 17,406,900
EBP, Investment, Issuer Name [Extensible Enumeration] Hartford Small Cap Growth [Member]
EBP, Investment, Current Value, Type [Extensible Enumeration] Hartford Small Cap Growth [Member]
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Investment, Identifier [Axis]: Nomura Small Cap Value Fund Nomura Small Cap Value Fund  
EBP, Schedule of Asset Held for Investment [Line Items]  
Current Value $ 13,386,901
EBP, Investment, Issuer Name [Extensible Enumeration] Nomura Small Cap Value Fund [Member]
EBP, Investment, Current Value, Type [Extensible Enumeration] Nomura Small Cap Value Fund [Member]
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Investment, Identifier [Axis]: Self-Directed  
EBP, Schedule of Asset Held for Investment [Line Items]  
Current Value $ 5,788,987
EBP, Investment, Issuer Name [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanSelfDirectedBrokerageAccountMember
EBP, Investment, Current Value, Type [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanSelfDirectedBrokerageAccountMember
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Investment, Identifier [Axis]: State Street Global All Cap Equity State Street Global All Cap Equity  
EBP, Schedule of Asset Held for Investment [Line Items]  
Current Value $ 69,859,501
EBP, Investment, Issuer Name [Extensible Enumeration] State Street Global All Cap Equity [Member]
EBP, Investment, Current Value, Type [Extensible Enumeration] State Street Global All Cap Equity [Member]
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Investment, Identifier [Axis]: State Street Investment Management Trust Company Russell Large Cap Growth Index Fund  
EBP, Schedule of Asset Held for Investment [Line Items]  
Current Value $ 108,117,051
EBP, Investment, Issuer Name [Extensible Enumeration] State Street Investment Management Trust Company [Member]
EBP, Investment, Current Value, Type [Extensible Enumeration] Russell Large Cap Growth Index Fund [Member]
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Investment, Identifier [Axis]: State Street Investment Management Trust Company Russell Large Cap Value Index Fund  
EBP, Schedule of Asset Held for Investment [Line Items]  
Current Value $ 67,873,013
EBP, Investment, Issuer Name [Extensible Enumeration] State Street Investment Management Trust Company [Member]
EBP, Investment, Current Value, Type [Extensible Enumeration] Russell Large Cap Value Index Fund [Member]
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Investment, Identifier [Axis]: State Street Investment Management Trust Company Russell Small Mid Cap Index Fund  
EBP, Schedule of Asset Held for Investment [Line Items]  
Current Value $ 24,729,848
EBP, Investment, Issuer Name [Extensible Enumeration] State Street Investment Management Trust Company [Member]
EBP, Investment, Current Value, Type [Extensible Enumeration] Russell Small Mid Cap Index Fund [Member]
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Investment, Identifier [Axis]: State Street Investment Management Trust Company S&P 500 Index Fund  
EBP, Schedule of Asset Held for Investment [Line Items]  
Current Value $ 320,013,858
EBP, Investment, Issuer Name [Extensible Enumeration] State Street Investment Management Trust Company [Member]
EBP, Investment, Current Value, Type [Extensible Enumeration] S and P Five Hundred Index Fund [Member]
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Investment, Identifier [Axis]: State Street Investment Management Trust Company Target Retirement 2025 Fund  
EBP, Schedule of Asset Held for Investment [Line Items]  
Current Value $ 13,695,462
EBP, Investment, Issuer Name [Extensible Enumeration] State Street Investment Management Trust Company [Member]
EBP, Investment, Current Value, Type [Extensible Enumeration] Target Retirement Two Thousand Twenty Five Fund [Member]
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Investment, Identifier [Axis]: State Street Investment Management Trust Company Target Retirement 2030 Fund  
EBP, Schedule of Asset Held for Investment [Line Items]  
Current Value $ 119,799,457
EBP, Investment, Issuer Name [Extensible Enumeration] State Street Investment Management Trust Company [Member]
EBP, Investment, Current Value, Type [Extensible Enumeration] Target Retirement Two Thousand Thirty Fund [Member]
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Investment, Identifier [Axis]: State Street Investment Management Trust Company Target Retirement 2035 Fund  
EBP, Schedule of Asset Held for Investment [Line Items]  
Current Value $ 18,485,805
EBP, Investment, Issuer Name [Extensible Enumeration] State Street Investment Management Trust Company [Member]
EBP, Investment, Current Value, Type [Extensible Enumeration] Target Retirement Two Thousand Thirty Five Fund [Member]
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Investment, Identifier [Axis]: State Street Investment Management Trust Company Target Retirement 2040 Fund  
EBP, Schedule of Asset Held for Investment [Line Items]  
Current Value $ 133,205,907
EBP, Investment, Issuer Name [Extensible Enumeration] State Street Investment Management Trust Company [Member]
EBP, Investment, Current Value, Type [Extensible Enumeration] Target Retirement Two Thousand Forty Fund [Member]
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Investment, Identifier [Axis]: State Street Investment Management Trust Company Target Retirement 2045 Fund  
EBP, Schedule of Asset Held for Investment [Line Items]  
Current Value $ 14,597,377
EBP, Investment, Issuer Name [Extensible Enumeration] State Street Investment Management Trust Company [Member]
EBP, Investment, Current Value, Type [Extensible Enumeration] Target Retirement Two Thousand Forty Five Fund [Member]
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Investment, Identifier [Axis]: State Street Investment Management Trust Company Target Retirement 2050 Fund  
EBP, Schedule of Asset Held for Investment [Line Items]  
Current Value $ 128,357,935
EBP, Investment, Issuer Name [Extensible Enumeration] State Street Investment Management Trust Company [Member]
EBP, Investment, Current Value, Type [Extensible Enumeration] Target Retirement Two Thousand Fifty Fund [Member]
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Investment, Identifier [Axis]: State Street Investment Management Trust Company Target Retirement 2055 Fund  
EBP, Schedule of Asset Held for Investment [Line Items]  
Current Value $ 11,418,043
EBP, Investment, Issuer Name [Extensible Enumeration] State Street Investment Management Trust Company [Member]
EBP, Investment, Current Value, Type [Extensible Enumeration] Target Retirement Two Thousand Fifty Five Fund [Member]
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Investment, Identifier [Axis]: State Street Investment Management Trust Company Target Retirement 2060 Fund  
EBP, Schedule of Asset Held for Investment [Line Items]  
Current Value $ 32,252,028
EBP, Investment, Issuer Name [Extensible Enumeration] State Street Investment Management Trust Company [Member]
EBP, Investment, Current Value, Type [Extensible Enumeration] Target Retirement Two Thousand Sixty Fund [Member]
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Investment, Identifier [Axis]: State Street Investment Management Trust Company Target Retirement 2065 Fund  
EBP, Schedule of Asset Held for Investment [Line Items]  
Current Value $ 1,126,380
EBP, Investment, Issuer Name [Extensible Enumeration] State Street Investment Management Trust Company [Member]
EBP, Investment, Current Value, Type [Extensible Enumeration] Target Retirement Two Thousand Sixty Five Fund [Member]
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Investment, Identifier [Axis]: State Street Investment Management Trust Company Target Retirement 2070 Fund  
EBP, Schedule of Asset Held for Investment [Line Items]  
Current Value $ 468,796
EBP, Investment, Issuer Name [Extensible Enumeration] State Street Investment Management Trust Company [Member]
EBP, Investment, Current Value, Type [Extensible Enumeration] Target Retirement Two Thousand Seventy Fund [Member]
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Investment, Identifier [Axis]: State Street Investment Management Trust Company Target Retirement Income Fund  
EBP, Schedule of Asset Held for Investment [Line Items]  
Current Value $ 51,006,912
EBP, Investment, Issuer Name [Extensible Enumeration] State Street Investment Management Trust Company [Member]
EBP, Investment, Current Value, Type [Extensible Enumeration] Target Retirement Income Fund [Member]
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Investment, Identifier [Axis]: T Rowe Price Mid Cap Val Equity T Rowe Price Mid-Cap Val Equity Trust D  
EBP, Schedule of Asset Held for Investment [Line Items]  
Current Value $ 19,029,331
EBP, Investment, Issuer Name [Extensible Enumeration] T Rowe Price Mid Cap Val Equity [Member]
EBP, Investment, Current Value, Type [Extensible Enumeration] T Rowe Price Mid Cap Val Equity Trust D [Member]
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Minimum  
EBP, Schedule of Asset Held for Investment [Line Items]  
Employee benefit plan, asset held for investment, participant loan, interest rate 4.25%
Maximum  
EBP, Schedule of Asset Held for Investment [Line Items]  
Employee benefit plan, asset held for investment, participant loan, interest rate 9.50%