Label	Element	Value
Restatement Adjustment [Member]
Selling, General and Administrative Expense	us-gaap_SellingGeneralAndAdministrativeExpense	$ 832,000,000
Selling, General and Administrative Expense	us-gaap_SellingGeneralAndAdministrativeExpense	(248,000,000)
Selling, General and Administrative Expense	us-gaap_SellingGeneralAndAdministrativeExpense	$ 245,000,000
Earnings Per Share, Basic	us-gaap_EarningsPerShareBasic	$ (2.02)
Earnings Per Share, Basic	us-gaap_EarningsPerShareBasic	0.69
Earnings Per Share, Basic	us-gaap_EarningsPerShareBasic	$ (0.50)
Accumulated Other Comprehensive Income (Loss), Net of Tax	us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax	$ 4,962,000,000
Accumulated Other Comprehensive Income (Loss), Net of Tax	us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax	5,257,000,000
Increase (Decrease) in Other Operating Liabilities	us-gaap_IncreaseDecreaseInOtherOperatingLiabilities	(505,000,000)
Increase (Decrease) in Other Operating Liabilities	us-gaap_IncreaseDecreaseInOtherOperatingLiabilities	(590,000,000)
Increase (Decrease) in Other Operating Liabilities	us-gaap_IncreaseDecreaseInOtherOperatingLiabilities	(341,000,000)
Other Comprehensive Income (Loss), Tax	us-gaap_OtherComprehensiveIncomeLossTax	$ 2,400,000,000
Earnings Per Share, Diluted	us-gaap_EarningsPerShareDiluted	$ (1.98)
Earnings Per Share, Diluted	us-gaap_EarningsPerShareDiluted	0.68
Earnings Per Share, Diluted	us-gaap_EarningsPerShareDiluted	$ (0.50)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax	us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	$ 9,000,000
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax	us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	4,000,000
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax	us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	0
Deferred Income Tax Expense (Benefit)	us-gaap_DeferredIncomeTaxExpenseBenefit	(954,000,000)
Deferred Income Tax Expense (Benefit)	us-gaap_DeferredIncomeTaxExpenseBenefit	(307,000,000)
Deferred Income Tax Expense (Benefit)	us-gaap_DeferredIncomeTaxExpenseBenefit	(431,000,000)
Defined Benefit Plan, Actuarial Gain (Loss)	us-gaap_DefinedBenefitPlanActuarialGainLoss	(2,624,000,000)
Defined Benefit Plan, Actuarial Gain (Loss)	us-gaap_DefinedBenefitPlanActuarialGainLoss	(179,000,000)
Defined Benefit Plan, Actuarial Gain (Loss)	us-gaap_DefinedBenefitPlanActuarialGainLoss	(985,000,000)
Research and Development Expense	us-gaap_ResearchAndDevelopmentExpense	245,000,000
Research and Development Expense	us-gaap_ResearchAndDevelopmentExpense	(46,000,000)
Research and Development Expense	us-gaap_ResearchAndDevelopmentExpense	83,000,000
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	us-gaap_ProfitLoss	(1,243,000,000)
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	us-gaap_ProfitLoss	410,000,000
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	us-gaap_ProfitLoss	(295,000,000)
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Unamortized Gain (Loss) Arising During Period, Net of Tax	us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax	1,578,000,000
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Unamortized Gain (Loss) Arising During Period, Net of Tax	us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax	10,000,000
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Unamortized Gain (Loss) Arising During Period, Net of Tax	us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax	621,000,000
Increase (Decrease) in Other Operating Assets	us-gaap_IncreaseDecreaseInOtherOperatingAssets	(161,000,000)
Increase (Decrease) in Other Operating Assets	us-gaap_IncreaseDecreaseInOtherOperatingAssets	(363,000,000)
Increase (Decrease) in Other Operating Assets	us-gaap_IncreaseDecreaseInOtherOperatingAssets	(178,000,000)
Net Income (Loss) Available to Common Stockholders, Basic	us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic	(1,243,000,000)
Net Income (Loss) Available to Common Stockholders, Basic	us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic	410,000,000
Net Income (Loss) Available to Common Stockholders, Basic	us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic	(295,000,000)
Cost of Goods Sold	us-gaap_CostOfGoodsSold	951,000,000
Cost of Goods Sold	us-gaap_CostOfGoodsSold	(196,000,000)
Cost of Goods Sold	us-gaap_CostOfGoodsSold	235,000,000
Other Nonoperating Income (Expense)	us-gaap_OtherNonoperatingIncomeExpense	83,000,000
Other Nonoperating Income (Expense)	us-gaap_OtherNonoperatingIncomeExpense	55,000,000
Other Nonoperating Income (Expense)	us-gaap_OtherNonoperatingIncomeExpense	96,000,000
Other Operating Income (Expense), Net	us-gaap_OtherOperatingIncomeExpenseNet	14,000,000
Other Operating Income (Expense), Net	us-gaap_OtherOperatingIncomeExpenseNet	39,000,000
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, for Net Gain (Loss), Net of Tax	us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax	344,000,000
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, for Net Gain (Loss), Net of Tax	us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax	424,000,000
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, for Net Gain (Loss), Net of Tax	us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax	326,000,000
Income Tax Expense (Benefit)	us-gaap_IncomeTaxExpenseBenefit	(688,000,000)
Income Tax Expense (Benefit)	us-gaap_IncomeTaxExpenseBenefit	174,000,000
Income Tax Expense (Benefit)	us-gaap_IncomeTaxExpenseBenefit	(172,000,000)
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets	us-gaap_NewAccountingPronouncementOrChangeInAccountingPrincipleCumulativeEffectOfChangeOnEquityOrNetAssets1	4,100,000,000
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest	us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	(1,931,000,000)
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest	us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	584,000,000
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest	us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	(467,000,000)
Operating Expenses	us-gaap_OperatingExpenses	2,014,000,000
Operating Expenses	us-gaap_OperatingExpenses	(529,000,000)
Operating Expenses	us-gaap_OperatingExpenses	563,000,000
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax	us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	(1,234,000,000)
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax	us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	414,000,000
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax	us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	(295,000,000)
Other Comprehensive Income (Loss), Net of Tax	us-gaap_OtherComprehensiveIncomeLossNetOfTax	1,243,000,000
Other Comprehensive Income (Loss), Net of Tax	us-gaap_OtherComprehensiveIncomeLossNetOfTax	(410,000,000)
Other Comprehensive Income (Loss), Net of Tax	us-gaap_OtherComprehensiveIncomeLossNetOfTax	295,000,000
Operating Income (Loss)	us-gaap_OperatingIncomeLoss	(2,014,000,000)
Operating Income (Loss)	us-gaap_OperatingIncomeLoss	529,000,000
Operating Income (Loss)	us-gaap_OperatingIncomeLoss	(563,000,000)
Profit of Consolidated Companies	cat_ProfitOfConsolidatedCompanies	(1,243,000,000)
Profit of Consolidated Companies	cat_ProfitOfConsolidatedCompanies	410,000,000
Profit of Consolidated Companies	cat_ProfitOfConsolidatedCompanies	(295,000,000)
Other Noncash Income (Expense)	us-gaap_OtherNoncashIncomeExpense	83,000,000
Other Noncash Income (Expense)	us-gaap_OtherNoncashIncomeExpense	55,000,000
Other Noncash Income (Expense)	us-gaap_OtherNoncashIncomeExpense	96,000,000
Retained Earnings (Accumulated Deficit)	us-gaap_RetainedEarningsAccumulatedDeficit	(4,962,000,000)
Retained Earnings (Accumulated Deficit)	us-gaap_RetainedEarningsAccumulatedDeficit	$ (5,257,000,000)

Income (Loss) from Continuing Operations less Income Taxes and before Income (Loss) from Equity Method Investments

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Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge.

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Total costs related to goods produced and sold during the reporting period.

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Amount of deferred income tax expense (benefit) pertaining to income (loss) from continuing operations.

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Amount of gain (loss) related to change in benefit obligation resulting from changes in actuarial assumptions, for example, but not limited to, interest, mortality, employee turnover, salary, and temporary deviation from the substantive plan.

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The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Net income after adjustments for dividends on preferred stock (declared in the period) and/or cumulative preferred stock (accumulated for the period).

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Generally recurring costs associated with normal operations except for the portion of these expenses which can be clearly related to production and included in cost of sales or services. Includes selling, general and administrative expense.

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