Financing receivables that are equal to or greater than 90 days past due. No authoritative reference available. Defined Benefit Plan Fair Value Of Plan Assets Unfunded Commitments 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. Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Reinvested Dividends In Period 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. Financing Receivable Fair Value No authoritative reference available. This item represents the fair value of debt securities which are expected to mature after three years and through five years from the balance sheet date and which are categorized as marketable. 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. 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. For each plan, identification of the award pricing model or other valuation method used in calculating the weighted average fair values disclosed. The model is also used to calculate the compensation expense that is shown within the balance sheet, income statement, and cash flow. Examples of valuation techniques are lattice models (binomial model), closed-form models (Black-Scholes-Merton formula), and a Monte Carlo simulation technique. Fair value is the amount at which an asset (or liability) could be bought (or incurred) or sold (or settled) in a current transaction between willing parties, that is, other than in a forced or liquidation sale. May include disclosures about the assumptions underlying application of the method selected. No authoritative reference available. This item represents the total of all debt securities grouped by maturity dates, at fair value, which are categorized as marketable. 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. Percentage Of Employer Common Stock To Plan Assets No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Long lived, depreciable structure held for productive use, including office, production, storage and distribution facilities. 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. 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. 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. Financing receivables that are current. No authoritative reference available. No authoritative reference available. No authoritative reference available. Stock repurchase program, authorized amount No authoritative reference available. No authoritative reference available. No authoritative reference available. Share Based Compensation Arrangement By Share Based Payment Award Options Expire Duration No authoritative reference available. Defined Benefit Plan, Fair Value of Plan Assets, Benefits Paid No authoritative reference available. No authoritative reference available. No authoritative reference available. Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Weighted Average Remaining Vesting Term 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. Unrecognized Tax Benefits Reconciliation, Table [Text Block] No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Contractual Commitments [Text Block] No authoritative reference available. No authoritative reference available. No authoritative reference available. Gain Loss On Sale Of Business Before Tax No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Number of Ground Mechanics No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Debt Instrument, Weighted Average Interest Rate No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Share-based Compensation, Options Outstanding, Exercise Price Range, Lower Range Limit 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. Share-based Compensation, Options Outstanding, Exercise Price Range, Upper Range Limit No authoritative reference available. No authoritative reference available. No authoritative reference available. Stock repurchase program, remaining authorized repurchase amount No authoritative reference available. Earnings Per Share Computation. No authoritative reference available. Discussion of Debt Securities Interest Rate No authoritative reference available. Quarterly Financial Information Table [Text Block] No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Minimum Applicable Margin Rate No authoritative reference available. Defined Benefit Plan, Accumulated Other Comprehensive Income, Deferred Tax Asset 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. Long lived, depreciable property, plant or equipment held for lease to others under contractual agreements meeting the criteria for operating lease classification. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Debt Instrument Earliest Callable Period No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Expected to Vest, Number No authoritative reference available. Pension and Postretirement Plan Assets By Fair Value Hierarchy [Text Block] No authoritative reference available. Insurance And Self Insurance 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. Realized Securities Gross Losses No authoritative reference available. No authoritative reference available. No authoritative reference available. Financing Receivable Credit Quality Indicators Table Commercial Portfolio [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. Financing Receivables Past Due [Text Block] No authoritative reference available. No authoritative reference available. No authoritative reference available. Fair Value Hedges Gains (Losses) Recognized in Income [Text Block] No authoritative reference available. No authoritative reference available. No authoritative reference available. This item represents the fair value of debt securities which are expected to mature after one year and through three years from the balance sheet date and which are categorized as marketable. No authoritative reference available. No authoritative reference available. No authoritative reference available. Letters Of Credit Outstanding 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. Notional Amounts of Outstanding Derivative Positions Disclosure [Text Block] No authoritative reference available. The net change during the reporting period for accrued known and estimated losses incurred as of the balance sheet date for which no insurance coverage exists, and for which a claim has been made or is probable of being asserted, typically arising from workmen's' compensation-type of incidents and personal injury to nonemployees from accidents on the entity's property. 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. Tangible asset calculation used in debt covenant compliance test. No authoritative reference available. No authoritative reference available. No authoritative reference available. Revenue by Geography [Text Block] No authoritative reference available. Share based Compensation Arrangement by Share based Payment Award, Equity Instruments Other than Options, Nonvested, Total Intrinsic Value No authoritative reference available. Debt Instrument Earliest Putable Period No authoritative reference available. No authoritative reference available. No authoritative reference available. Net worth calculation used in debt covenant compliance test. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Impaired Asset At Carrying Value, Net No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Contractual Commitments Future Minimum Payments Due In Two Years No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Long lived, depreciable assets used for the primary purpose of air transportation. 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. Operating Leases, Future Minimum Payments, Due in Five Years and Thereafter No authoritative reference available. Defined Benefit Plan, Accumulated Other Comprehensive Income, Gross Unrecognized Cost No authoritative reference available. Debt Instrument, Decrease, Maturities No authoritative reference available. No authoritative reference available. No authoritative reference available. Maximum length of time over which the entity is hedging its exposure to the variability in future cash flows for forecasted transactions, excluding those forecasted transactions related to the payment of variable interest on existing financial instruments. No authoritative reference available. This item represents debt securities, at cost, net of adjustments made for accretion, amortization, other-than-temporary impairments, and hedging, if any, which are expected to mature after one year and through three years from the balance sheet date and which are categorized as marketable. 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. Defined Contribution Plan Cost Expected To Be Recognized 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. Acquisitions, Goodwill and Intangible Assets Disclosure No authoritative reference available. No authoritative reference available. No authoritative reference available. Disclosure of cash, cash equivalents and investments 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 Teamsters 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. No authoritative reference available. No authoritative reference available. Contractual Commitments Future Minimum Payments Due In Five 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. 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. Debt Instrument, Interest Rate, Implied Percentage Rate Range, Minimum No authoritative reference available. Surety Bonds No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Commitment To Fund Partnership Equity Investments Period No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Components of accumulated other comprehensive income. No authoritative reference available. Employee Benefit Payments Period in Years No authoritative reference available. This item represents debt securities, at cost, net of adjustments made for accretion, amortization, other-than-temporary impairments, and hedging, if any, which are expected to mature within one year of the balance sheet date and which are categorized as marketable. 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. Debt Instrument Interest Rate Below One Month LIBOR Rate 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. Restructuring charges, Net of Tax 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. Plans With Accumulated And Projected Benefit Obligations In Excess Of The Fair Value Of Plan Assets, Disclosure [Text Block] No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Unrecognized Tax Benefits Reductions Resulting From Changes Based On Facts And Circumstances No authoritative reference available. This item represents the excess of amortized cost basis over fair value of securities in a loss position and which are categorized neither as held-to-maturity nor trading securities. No authoritative reference available. No authoritative reference available. No authoritative reference available. Auction rate securities, at Fair Value 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. Pension and Postretirement Plan Assets By Fair Value Hierarchy, Unobservable Input Reconciliation [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. Fair Value Measurements And Disclosures Policy [Text Block] No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Minimum Net Worth Required 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. Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Expected To Vest Aggregate Intrinsic Value 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. Maximum Applicable Margin Rate No authoritative reference available. No authoritative reference available. No authoritative reference available. Recent accounting pronouncements , Policy [Text Block] No authoritative reference available. No authoritative reference available. No authoritative reference available. Investments classified by contractual maturity date. 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. Increase Decrease In Deferred Tax 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. Schedule of Components of Provision (Benefit) for Income Taxes [Text Block] No authoritative reference available. No authoritative reference available. No authoritative reference available. Accumulated appreciation or loss, pre-tax, in value of unsold auction rate securities at the end of an accounting period. No authoritative reference available. Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Expected to Vest, Weighted Average Grant Date Fair Value No authoritative reference available. Business Acquisition, Cost of Acquired Entity, Cash To Be Paid No authoritative reference available. Perpetual Preferred Securities, and Auction Rate Securities at Cost No authoritative reference available. No authoritative reference available. No authoritative reference available. Reclassifications Policy [Text Block] No authoritative reference available. No authoritative reference available. No authoritative reference available. Number of shares required to settle deferred compensation obligations included in share calculation for basic earnings 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. 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. 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. Pending Accounting Pronouncements Policy [Text Block] No authoritative reference available. No authoritative reference available. No authoritative reference available. Amount of long-lived assets other than financial instruments, long-term customer relationships of a financial institution, mortgage and other servicing rights, deferred policy acquisition costs, and deferred tax assets, located worldwide. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Expected To Vest Weighted Average Remaining Contractual Term 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. Debt Covenant Tangible Asset Percentage No authoritative reference available. This item represents the cost of debt and equity securities, which are categorized neither as held-to-maturity nor trading, net of adjustments made for accretion, amortization, other-than-temporary impairments, and hedging, if any. No authoritative reference available. Financing receivables that are less than 90 days past due but more than 59 days past due. No authoritative reference available. Pension and Other Postretirement Benefits, Recognized in Accumulated Comprehensive Income (Loss) Disclosure [Text Block] No authoritative reference available. Financing Receivable Unfunded Loan Commitment 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. Use Of Estimates 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. Basis of Presentation Policy [Text Block] No authoritative reference available. Debt Instrument, Maximum Borrowing Capacity, Amount 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. Par value of auction rate securities successfully auctioned during the period. No authoritative reference available. Financing Receivable, by Contractual Maturity [Text Block] No authoritative reference available. No authoritative reference available. No authoritative reference available. Impaired Financing Receivables Table [Text Block] No authoritative reference available. The realized gain or loss on the sale of divested businesses, included both in continuing operations as well as in discontinued operations, net of income taxes. No authoritative reference available. Contractual Commitments Future Minimum Payments Due Current No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. This item represents debt securities, at cost, net of adjustments made for accretion, amortization, other-than-temporary impairments, and hedging, if any, which are expected to mature after three years and through five years from the balance sheet date and which are categorized as marketable. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Restricted Performance Units Activity [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. This item represents the unrealized losses on debt or equity securities categorized neither as held-to-maturity nor trading securities. No authoritative reference available. No authoritative reference available. No authoritative reference available. Debt Instrument Incremental Issuance Amount 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 item represents the total of all debt securities grouped by maturity dates, at cost, net of adjustments made for accretion, amortization, other-than-temporary impairments, and hedging, if any, which are classified as marketable. 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. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Schedule of U.S. and non-U.S. components of income before income tax expense/(benefit) [Text Block] No authoritative reference available. No authoritative reference available. No authoritative reference available. Expected Decrease in Number of Employees Due to Restructuring No authoritative reference available. No authoritative reference available. No authoritative reference available. Defined Benefit Plan, Contributions by Employee, Impact On Plan Assets No authoritative reference available. Income Taxes Interest Receivable No authoritative reference available. Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements No authoritative reference available. No authoritative reference available. No authoritative reference available. The estimated net amount of existing gains (losses) on cash flow hedges at the reporting date expected to be reclassified to earnings within the next 12 months. 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. Deferred Tax Assets Operating Loss And Tax Credit Carry forwards Foreign 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 item represents the fair value of debt securities which are expected to mature within one year of the balance sheet date and which are categorized as marketable. 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, Currency and Other 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. Defined Benefit Plan Amortization Of, Other 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. Debt Instrument, Interest Rate, Implied Percentage Rate Range, Maximum No authoritative reference available. Unrealized Loss Position Investments [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. Available-for-sale Securities, Continuous Unrealized Losses, Less than Twelve Months. No authoritative reference available. Long lived, depreciable assets used primarily for road transportation. No authoritative reference available. No authoritative reference available. No authoritative reference available. Defined Benefit Plan Increase Decrease Accumulated Other Comprehensive Income Loss Net Of Tax No authoritative reference available. No authoritative reference available. No authoritative reference available. Increase Decrease in Earnings Per Share Basic and Diluted No authoritative reference available. No authoritative reference available. No authoritative reference available. Pension and Other Postretirement Benefits, Changes in Benefit Obligation and Fair Value of Plan Assets Disclosure [Text Block] No authoritative reference available. No authoritative reference available. No authoritative reference available. Share Based Compensation, Options Activity, Disclosure [Text Block] No authoritative reference available. The tax effect on elements that Includes the accumulated change in the value of either the projected benefit obligation or the plans assets resulting from experience different from that assumed or from a change in an actuarial assumption, after tax. Also includes the cost or benefit resulting from a plan amendment that occurred during the period, after tax. These amounts have not been recognized in net periodic benefit cost pursuant to SFAS 87 and 106. No authoritative reference available. No authoritative reference available. No authoritative reference available. Stock Issued, Employee Stock Purchase Plan, Average Price Per Share No authoritative reference available. No authoritative reference available. No authoritative reference available. Fair value option and measurement. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Reinvested Dividends In Period Weighted Average Grant Date Fair Value 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. Pension and Other Postretirement Benefits, Net Periodic Benefit Costs Weighted Average Assumptions Disclosure [Text Block] No authoritative reference available. The entire disclosure for financing receivables. Examples of financing receivables include, but are not limited to, loans, trade accounts receivables, notes receivable, credit cards, and receivables relating to a lessor's right(s) to payment(s) from a lease other than an operating lease that is recognized as assets. 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. Sensitivity Analysis Of Projected Benefit Obligations, Impact Of 1 Percentage Point Increase In Discount Rate 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. Increase Decrease in Earnings Per Share Diluted 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. Pension and Other Postretirement Benefits, Funded Status Disclosure [TextBlock] No authoritative reference available. Number of Countries in which Product is Sold No authoritative reference available. No authoritative reference available. No authoritative reference available. Reversal of deferred tax asset valuation allowance 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 item represents the total of all equity securities, at cost, net of adjustments made for accretion, amortization, other-than-temporary impairments, and hedging, if any, which are classified as marketable. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Postretirement Medical Benefits Number Of Years Of Service For Eligibility No authoritative reference available. Number Of Credit Facilities 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. This item represents the unrealized gain on debt or equity securities categorized neither as held-to-maturity nor trading securities. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Reduction In Number Of Regions No authoritative reference available. No authoritative reference available. No authoritative reference available. Current portion of the carrying amount of accrued known and estimated losses incurred as of the balance sheet date for which no insurance coverage exists, and for which a claim has been made or is probable of being asserted, typically arising from workmen's' compensation-type of incidents and personal injury to nonemployees from accidents on the entity's property. No authoritative reference available. No authoritative reference available. No authoritative reference available. Contractual Commitments Future Minimum Payments Due No authoritative reference available. Redemption Notice Period Upper Limit No authoritative reference available. Debt Redemption Price, Description No authoritative reference available. No authoritative reference available. No authoritative reference available. Contractual Commitments Future Minimum Payments Due In Three Years No authoritative reference available. Basis Point Increase In Pension And Postretirement Benefits Discount Rate No authoritative reference available. No authoritative reference available. No authoritative reference available. Number of Pilots No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Defined Benefit Plan, Assets Target Allocations, Total No authoritative reference available. Number Of Employees Offered Voluntary Severance Packages 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. Common Stock And Capital Surplus[Text Block] No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Multiemployer Plan Withdrawal Expense No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Benefit Obligations Weighted Average Assumptions Disclosure [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. Other Comprehensive Income, Net Actuarial Gains (Losses) And Prior Service Cost Arising During Period, Net Of Tax 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. Debt Instrument, Decrease, Redemption No authoritative reference available. No authoritative reference available. No authoritative reference available. Reconciliation Of Statutory Federal Tax Rate [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. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Contractual Commitments Future Minimum Payments Due In Four Years No authoritative reference available. No authoritative reference available. No authoritative reference available. Redemption Notice Period, Lower Limit No authoritative reference available. Perpetual Preferred Securities, and Auction Rate Securities at Fair Value No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Financing receivables that are less than 60 days past due but more than 29 days past due. No authoritative reference available. No authoritative reference available. No authoritative reference available. Defined Benefit Plans Period Over Which Investment Gains and Losses are Recognized for Market Related Value of Assets No authoritative reference available. No authoritative reference available. No authoritative reference available. Share Based Compensation Arrangement by Share Based Payment Award Stock Purchase Rights Grants in Period Weighted Average Grant Date Fair Value No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. This item represents debt securities, at cost, net of adjustments made for accretion, amortization, other-than-temporary impairments, and hedging, if any, which are expected to mature after five years from the balance sheet date and which are categorized as marketable. No authoritative reference available. Auction rate securities, at Cost No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Pension and Other Postretirement Benefits, Expected Benefit Payments Disclosure [Text Block] No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Percentage Of Unrecognized Gains Or Losses Of Greater Of Projected Benefit t Obligation Or Market Related Value Of Plan Assets Amortized No authoritative reference available. Financing Receivables Table [Text Block] No authoritative reference available. No authoritative reference available. No authoritative reference available. Impaired Asset At Fair Value 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. Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases No authoritative reference available. Medical Coverage Required Age No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Restricted Stock Units Activity [Text Block] No authoritative reference available. Accumulated appreciation or loss, net of tax, in value of unsold auction rate securities at the end of an accounting period. 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. Long lived, depreciable assets used in the creation, maintenance and utilization of information systems which include computers and peripherals. No authoritative reference available. No authoritative reference available. No authoritative reference available. Deferred Tax Liabilities, Gross 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. Pension And Postretirement Plan 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. No authoritative reference available. No authoritative reference available. Share Based Compensation Arrangement By Share Based Payment Award Exercisable Price Percentage Of Closing Price Of Another Class Of 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. 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. Debt Not Subject To Early Redemption No authoritative reference available. Common Stock, Votes 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. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Settlement due to customers. No authoritative reference available. Employee Service Share Based Compensation Unrecognized Compensation Costs For Nonvested Awards Weighted Average Period Of Recognition 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. Contractual Commitments Future Minimum Payments Due Thereafter 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. Defined Benefit Plan, Service Cost Impact On Benefit Obligation 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. Defined Benefit Plan, Other Benefit Obligations 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. 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. Increase Decrease In Earnings Per Share Basic 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. No authoritative reference available. No authoritative reference available. Effect of a One-Percentage Point Change in Assumed Health Care Cost Trend Rates Disclosure [Text Block] No authoritative reference available. Increase (Decrease) In Net Income Loss 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. Reduction In Number Of Districts No authoritative reference available. No authoritative reference available. No authoritative reference available. This item represents the total of all equity securities, at fair value, which are categorized as marketable. No authoritative reference available. No authoritative reference available. No authoritative reference available. Debt Instrument, Principal Amount, Redeemed 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. Incremental Common Shares Attributable to Restricted Performance Units No authoritative reference available. Realized Securities Gross Gains No authoritative reference available. No authoritative reference available. No authoritative reference available. Tabular disclosure of financing receivables (examples of financing receivables include loans, trade accounts receivable and notes receivable) and activity in the allowance for credit losses account. No authoritative reference available. Defined Benefit Plan Assets With Unobservable Inputs Purchases No authoritative reference available. Defined Benefit Plan, Other No authoritative reference available. Components of Deferred Tax Assets and Liabilities [Text Block] No authoritative reference available. Share Based Compensation Arrangement By Share Based Payment Award Percentage Of Shares Vested No authoritative reference available. No authoritative reference available. No authoritative reference available. Schedule of Derivative Instruments Recognized in Other Comprehensive Income No authoritative reference available. Defined Benefit Plan, Pension Plans With Projected Benefit Obligations In Excess Of Plan Assets, Aggregate Accumulated Benefit Obligation 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. Long-lived, depreciable addition, improvement, or renovation to a productive facility, such as interior masonry, interior flooring, electrical, and plumbing. 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. Available-for-sale Securities, Continuous Unrealized Losses, Twelve Months or Longer. No authoritative reference available. Debentures 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. Defined Benefit Plan, Benefit Obligation, Interest Cost No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. This item represents the fair value of debt securities which are expected to mature after five years from the balance sheet date which are categorized as marketable. No authoritative reference available.