The net change during the reporting period in the aggregate value of all materials and supplies held by the reporting entity, associated with underlying transactions that are classified as operating activities. No authoritative reference available. No authoritative reference available. No authoritative reference available. Cash flow impact from Accounts Receivable Sales Program classified as Financing Activities. No authoritative reference available. The aggregate sum of gross carrying value of a major finite-lived intangible liability class, less accumulated amortization and any impairment charges. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Effects Of Derivative Instruments Gains And Losses Text Block. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Schedule of amounts recorded in the statement of financial position for derivative transactions, net of any master netting arrangements. No authoritative reference available. No authoritative reference available. No authoritative reference available. The amount of acquisition cost of a business combination allocated to unapplied materials and supplies to be used in the performance or support of carrier operations acquired in a business combination. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. The charge against earnings in the period to increase environmental loss contingency reserves, net of any adjustments to reduce previously estimated charges. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Change In Other Comprehensive Income Of Equity Method Investees. No authoritative reference available. No authoritative reference available. No authoritative reference available. Components of accumulated other comprehensive income (loss). No authoritative reference available. No authoritative reference available. No authoritative reference available. Describes an entity's accounting policy for rail grinding costs. No authoritative reference available. No authoritative reference available. No authoritative reference available. The payments made in the period which reduced personal injury loss contingency reserves. No authoritative reference available. No authoritative reference available. No authoritative reference available. The calculated weighted-average amortization period of a major class of finite-lived intangible liabilities acquired during the current period either individually or as part of a group of liabilities (in either an asset acquisition or business combination). A major class is composed of intangible liabilities that can be grouped together because they are similar, either by their nature or by their use in the operations of a company. No authoritative reference available. Additional debt securities authorized for issuance by the Board of Managers. No authoritative reference available. No authoritative reference available. No authoritative reference available. Senior unsecured debt ratings for BNSF. No authoritative reference available. Sum of operating profit (loss) and non-operating income (expense) before income taxes. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. The net change during the reporting period in the amount of noncurrent costs accrued for casualty, environmental and other loss contingencies. No authoritative reference available. Number of fair value hedge separate swap agreements No authoritative reference available. Expiry date of long-term revolving bank credit facility. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Number of shares related to restricted stock activity and associated tax benefit (expense) during the period as a result of the share-based compensation plan. No authoritative reference available. Amount of cash, without interest, each share of common stock converted into the right to receive if cash was paid as consideration. No authoritative reference available. Capacity to sell undivided interests to investors under the accounts receivable sales facilities. No authoritative reference available. No authoritative reference available. No authoritative reference available. Capital lease terms of obligations entered into during the period, Maximum. No authoritative reference available. Number of Accounts receivable sales facilities. No authoritative reference available. Accumulated impairment losses resulting from the write-down of goodwill after comparing the implied fair value of reporting unit goodwill with the carrying amount of that goodwill. No authoritative reference available. Noncurrent portion of costs accrued as of the balance sheet date for casualty, environmental and other loss contingencies. No authoritative reference available. Maximum Recourse Amount. No authoritative reference available. No authoritative reference available. No authoritative reference available. Common stock shares of Predecessor owned by acquiring company prior to the Merger. No authoritative reference available. No authoritative reference available. No authoritative reference available. Third-party investments of BNSF IC classified as cash and cash equivalents. No authoritative reference available. Projected percentage of future unasserted asbestos claims filed within next 25 years. No authoritative reference available. No authoritative reference available. No authoritative reference available. The amount of amortization of intangible liabilities expected to be recognized during the fourth year following the current year. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Fuel costs as a percent of total operating expenses. No authoritative reference available. BNSF ownership percentage of non-consolidated entities for which BNSF guarantees debt or other obligations. No authoritative reference available. No authoritative reference available. No authoritative reference available. Fuel-derivative position coverage of future years based on the average annual locomotive fuel consumption over the past three years. No authoritative reference available. No authoritative reference available. No authoritative reference available. The amount of amortization expense expected to be recognized during the second year following the current year. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Remaining Term (in years). No authoritative reference available. The portion of the carrying amount as of the balance sheet date of the personal injury loss contingency reserves which is expected to be resolved within one year or the normal operating cycle, if longer. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. The Company's ownership percentage of investment in low-income housing partnership. No authoritative reference available. Aggregate amount of amortization recognized for intangible liabilities during the period. A recognized intangible liability shall be amortized over its estimated useful life to the reporting entity unless that life is determined to be indefinite. If an intangible liability has a finite useful life, but the precise length of that life is not known, that intangible liability shall be amortized over the best estimate of its useful life. No authoritative reference available. The amount of amortization expense expected to be recognized during the fourth year following the current year. No authoritative reference available. The net tax benefit (expense) resulting from the change in accumulated gains and losses from derivative instrument designated and qualifying as the effective portion of cash flow hedges, net of tax effect. No authoritative reference available. Proceeds from the financing related to the construction of a facility that the Company intends to sell to a third party and subsequently lease back. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. The amount of amortization of intangible liabilities expected to be recognized during the third year following the current year. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. The amount of amortization expense expected to be recognized during the remainder of the current year. No authoritative reference available. No authoritative reference available. No authoritative reference available. The compensation expense recognized during the period pertaining to the share-based compensation plan. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Payments for construction costs of a facility that the Company intends to sell to a third party and subsequently lease back. No authoritative reference available. No authoritative reference available. No authoritative reference available. The amount of identifiable intangible liabilities recognized as of the acquisition date. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Value of Predecessor already owned by Berkshire valued at merger price of $100.00 per share. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Summary of Company's accrued obligations for personal injury matters. No authoritative reference available. Principal Amount Guaranteed. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Annual facility fees. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Cash flow impact from Accounts Receivable Sales Program, classified as Operating Activities. No authoritative reference available. No authoritative reference available. No authoritative reference available. Outstanding undivided interests sold to investors under the Accounts Receivable sales program. No authoritative reference available. No authoritative reference available. No authoritative reference available. The amount of amortization expense expected to be recognized during the year following the current year. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. The estimated maximum amount of possible loss from personal injury contingencies. No authoritative reference available. Anticipated period for which the majority of environment related accrued costs will be paid. No authoritative reference available. Guarantee Expiry Range Minimum. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Percentage of total Predecessor issued and outstanding shares of common stock owned by acquiring company prior to the Merger. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. The amount of amortization of intangible liabilities expected to be recognized during the year following the current year. No authoritative reference available. Reflects the amount of loss due to credit risk that, based on the gross fair value of the financial instrument, the entity would incur if parties to the financial instruments that make up the concentration failed completely to perform according to the terms of the contracts and the collateral or other security, if any, for the amount due proved to be of no value to the entity, net of any master netting arrangements. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. The amount of amortization of intangible liabilities expected to be recognized during the remainder of the current year. No authoritative reference available. Accumulated other comprehensive loss of equity method investees. No authoritative reference available. Investment commitments to be paid in 2013. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Cash dividends declared and paid to parent company by the reporting entity. No authoritative reference available. No authoritative reference available. No authoritative reference available. Total debt securities available for issuance during the period, which were authorized by the Board of Managers. No authoritative reference available. Amount of gain recorded for the unwind of interest rate hedges, which will be reflected as a reduction of interest expense over the remaining term of these notes. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Percentage of total merger consideration paid in the form of acquirer common stock. No authoritative reference available. The estimated minimum amount of possible loss from personal injury contingencies. No authoritative reference available. The amount of expense for contract services provided to the Company. No authoritative reference available. The estimated minimum amount of possible loss from environmental contingencies. No authoritative reference available. Percentage of total merger consideration paid in the form of cash. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Reconciliations of net income to comprehensive income. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. The net cash inflow (outflow) from other operating activities. This element is used when there is not a more specific and appropriate element in the taxonomy. No authoritative reference available. No authoritative reference available. No authoritative reference available. Projected percentage of future unasserted asbestos claims filed within next 10 years. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Summary of Company's accrued obligations for environmental matters. No authoritative reference available. Remaining Term. No authoritative reference available. No authoritative reference available. No authoritative reference available. The net tax benefit (expense) resulting from the adjustment out of other comprehensive income for prior service costs and actual losses recognized as a component of net period benefit cost during the period. No authoritative reference available. The amount of acquisition cost of a business combination allocated to the current portion of deferred income taxes. No authoritative reference available. Net of tax effect of discontinuance of hedge accounting on certain derivative instruments included in accumulated comprehensive income that was recognized in net income during the period. No authoritative reference available. Administrative, Judicial and other mandatory cleanup efforts, Total Sites. No authoritative reference available. Total investment in low-income housing partnership. No authoritative reference available. Outstanding common stock shares acquired. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Investment commitments paid at closing. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. The amount of acquisition cost of a business combination allocated to liabilities assumed and net assets acquired. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Total remaining debt securities authorized for issuance by the Board of Managers. No authoritative reference available. No authoritative reference available. No authoritative reference available. Maximum Recourse Amount for non consolidated entity. No authoritative reference available. No authoritative reference available. No authoritative reference available. Original swap entrance date. No authoritative reference available. No authoritative reference available. No authoritative reference available. Maximum Future Payments for Non Consolidated Entity. No authoritative reference available. No authoritative reference available. No authoritative reference available. Amortized intangible assets and liabilities Text Block. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. The cash outflow associated with the acquisition of equipment which includes locomotive, freight cars and other equipment, some or all of which may be sold and leased back by the Company through either an operating or capital lease. No authoritative reference available. The net tax benefit resulting from the issuance of stock during the period as a result of the exercise of stock options. No authoritative reference available. The amount of acquisition cost of a business combination allocated to an identifiable intangible liabilities that will be amortized. No authoritative reference available. The cash outflow associated with the acquisition of long-lived, physical assets, excluding equipment, that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets. No authoritative reference available. Future amortization of intangible assets and liabilities Text Block. No authoritative reference available. The charge against earnings in the period to increase personal injury loss contingency reserves, net of any adjustments to reduce previously estimated charges. No authoritative reference available. No authoritative reference available. No authoritative reference available. Value of Berkshire equity awards to replace pre-existing Predecessor equity awards. No authoritative reference available. Investment commitments to be paid in 2012. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Capital lease terms of obligations entered into during the period, Minimum. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. The carrying amount of personal injury loss contingency reserves. No authoritative reference available. The cash outflow from the distribution of an entity's earnings in the form of dividends to common shareholders or the parent company. No authoritative reference available. No authoritative reference available. No authoritative reference available. Recorded liability for third party environmental tort claims. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Net contribution from Berkshire Hathaway Inc. No authoritative reference available. Transfers and servicing of financial assets transfers of financial assets policy text block. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Describes an entity's accounting policy for finite-lived intangible assets and liabilities. This accounting policy also may address: (1) the amortization method used (2) the useful lives of such assets or liabilities (3) how the entity assesses and measures impairment of such assets or liabilities. No authoritative reference available. Total merger consideration to acquire the remaining shares of predecessor. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. The amount of acquisition cost of a business combination allocated to Casualty and Environmental Liabilities. No authoritative reference available. The amount of acquisition cost of a business combination allocated to the noncurrent liability for underfunded plans recognized in the balance sheet that is associated with the defined benefit pension plans and other postretirement defined benefit plans. No authoritative reference available. Future minimum lease payments associated with VIE leases. No authoritative reference available. Number of fair value hedge separate swap agreements. No authoritative reference available. Fair value of a derivative liability that is not designated or qualifying as a hedging instrument, presented on a gross basis even when the derivative instrument is subject to master netting arrangements and qualifies for net presentation in the statement of financial position. No authoritative reference available. No authoritative reference available. No authoritative reference available. The amount of amortization of intangible liabilities expected to be recognized during the second year following the current year. No authoritative reference available. Sum of the gross carrying amounts before accumulated amortization as of the balance sheet date of all intangible liabilities having statutory or estimated useful lives. The aggregate gross carrying amount (including any previously recognized impairment charges) of a major finite-lived intangible liability class. A major class is composed of intangible liabilities that can be grouped together because they are similar, either by their nature or by their use in the operations of a company. No authoritative reference available. Projected percentage of future unasserted asbestos claims filed within next 15 years. No authoritative reference available. The amount of acquisition cost of a business combination allocated to accounts payable and other current liabilities. No authoritative reference available. Consolidation variable interest entity policy text block. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. The amount of amortization expense expected to be recognized during the third year following the current year. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Credit Rating for Counterparties. No authoritative reference available. No authoritative reference available. No authoritative reference available. The adjustment out of other comprehensive income for prior service costs and actuarial losses recognized as a component of net period benefit cost during the period, after tax. No authoritative reference available. No authoritative reference available. No authoritative reference available. Describes how the entity accounts for completed business combinations (purchase method, acquisition method or combination of entities under common control). The policy description may include a general discussion of the purchase method or acquisition method of accounting (including for example, the treatment accorded contingent consideration, the identification of assets and liabilities, the purchase price allocation process, how the fair values of acquired assets and liabilities are determined) and the entity's specific application thereof. An entity that acquires another entity in a leveraged buyout transaction also should disclose the accounting policy followed by the acquiring entity in determining the basis used to value its interest in the acquired entity, and the rationale for that accounting policy. No authoritative reference available. Materials and other operating expenses not separately disclosed. This element is used when other, more specific, elements are not appropriate. No authoritative reference available. The estimated maximum amount of possible loss from environmental contingencies. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Rent paid for freight cars owned by other railroads or private companies, net of rents received, including lease expenses primarily for locomotives, railcars, containers and trailers. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. The unrelated General Partner's ownership percentage of investment in low-income housing partnership. No authoritative reference available. No authoritative reference available. No authoritative reference available. The accumulated amount of amortization of a major finite-lived intangible liability class. A major class is composed of intangible liabilities that can be grouped together because they are similar, either by their nature or by their use in the operations of a company. No authoritative reference available. Effective capacity to sell undivided interest to investors under the Accounts Receivable sales program. No authoritative reference available. Lowest credit rating of financial institutions providing credit for the accounts receivable sales facilities. No authoritative reference available. No authoritative reference available. No authoritative reference available. Principal Amount Guaranteed For Non consolidated Entity. No authoritative reference available. Due date of 10-year notes. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Guarantee Expiry Range Maximum. No authoritative reference available. No authoritative reference available. No authoritative reference available. Numerator amount of the exchange ratio to calculate the amount of acquirer common stock included as the right to receive per share of common stock if the consideration was issued in acquirer stock. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Value of acquiring company common stock issued as merger consideration. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Goodwill and Other Intangible Assets and Liabilities. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. The amount of acquisition cost of a business combination allocated to the noncurrent portion of the deferred income tax liability. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. This element contains a description of interim results as well as any significant changes in accounting policies or principles since the end of the most recent fiscal year. No authoritative reference available. No authoritative reference available. No authoritative reference available. Amortization of intangible assets and liabilities Text Block. No authoritative reference available. Aggregate carrying amount, as of the balance sheet date, of unapplied materials and supplies to be used in the performance or support of carrier operations. No authoritative reference available. Cash payments to parent for income taxes. No authoritative reference available. Administrative, Judicial and other mandatory cleanup efforts, Superfund Sites. No authoritative reference available. No authoritative reference available. No authoritative reference available.