$IBM
INTERNATIONAL BUSINESS MACHINES CORP Stock $ibm

$ibm Overview Financials Valuation SEC Filings Company Website

2012 Q4 Form 10-K Financial Statement

#000104746914001302 Filed on February 25, 2014

Income Statement

Concept	2012 Q4	2011 Q4	2011
Revenue	$29.30B	$29.49B	$106.9B
YoY Change	-0.62%	1.61%	7.06%
Cost Of Revenue	$14.14B	$14.76B	$56.78B
YoY Change	-4.25%	-0.19%	5.42%
Gross Profit	$15.17B	$14.72B	$50.14B
YoY Change	3.02%	3.49%	8.96%
Gross Profit Margin	51.76%	49.93%	46.89%
Selling, General & Admin	$6.216B	$5.987B	$23.59B
YoY Change	3.82%	2.62%	8.05%
% of Gross Profit	40.98%	40.67%	47.06%
Research & Development	$1.580B	$1.556B	$6.258B
YoY Change	1.54%	-1.39%	3.85%
% of Gross Profit	10.42%	10.57%	12.48%
Depreciation & Amortization	$1.152B	$1.188B	$3.589B
YoY Change	-3.03%	-3.81%	-1.86%
% of Gross Profit	7.6%	8.07%	7.16%
Operating Expenses	$7.965B	$7.318B	$29.85B
YoY Change	8.84%	2.87%	7.14%
Operating Profit	$7.202B	$7.404B	$20.29B
YoY Change	-2.73%	4.11%	11.76%
Interest Expense	$279.0M	-$114.0M	$411.0M
YoY Change	-344.74%	42.5%	11.68%
% of Operating Profit	3.87%	-1.54%	2.03%
Other Income/Expense, Net	$1.000M
YoY Change
Pretax Income	$7.831B	$7.272B	$21.00B
YoY Change	7.69%	3.99%	6.49%
Income Tax	$1.998B	$1.785B	$5.148B
% Of Pretax Income	25.51%	24.55%	24.51%
Net Earnings	$5.833B	$5.487B	$15.86B
YoY Change	6.31%	3.63%	6.89%
Net Earnings / Revenue	19.91%	18.61%	14.83%
Basic Earnings Per Share			$13.25
Diluted Earnings Per Share	$5.135M	$4.615M	$13.06
COMMON SHARES
Basic Shares Outstanding			1.197B shares
Diluted Shares Outstanding			1.214B shares

Balance Sheet

Concept	2012 Q4	2011 Q4	2011
SHORT-TERM ASSETS
Cash & Short-Term Investments	$11.13B	$11.92B	$11.92B
YoY Change	-6.65%	2.33%	2.33%
Cash & Equivalents	$10.41B	$11.92B	$11.92B
Short-Term Investments	$717.0M	$0.00	$0.00
Other Short-Term Assets	$5.439B	$6.849B	$6.849B
YoY Change	-20.59%	18.29%	18.29%
Inventory	$2.287B	$2.595B	$2.596B
Prepaid Expenses
Receivables	$10.67B	$11.18B	$28.39B
Other Receivables	$1.873B	$1.481B	$1.170B
Total Short-Term Assets	$49.43B	$50.93B	$50.93B
YoY Change	-2.94%	5.84%	5.84%
LONG-TERM ASSETS
Property, Plant & Equipment	$14.00B	$13.88B	$13.88B
YoY Change	0.81%	-1.51%	-1.51%
Goodwill	$29.25B	$26.21B
YoY Change	11.57%	4.28%
Intangibles	$3.787B	$3.392B
YoY Change	11.65%
Long-Term Investments	$120.0M	$131.0M	$4.895B
YoY Change	-8.4%	-97.73%	-15.28%
Other Assets	$5.021B	$4.895B	$6.345B
YoY Change	2.57%	-22.15%	0.91%
Total Long-Term Assets	$69.78B	$65.51B	$65.51B
YoY Change	6.53%	0.26%	0.26%
TOTAL ASSETS
Total Short-Term Assets	$49.43B	$50.93B	$50.93B
Total Long-Term Assets	$69.78B	$65.51B	$65.51B
Total Assets	$119.2B	$116.4B	$116.4B
YoY Change	2.39%	2.63%	2.63%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$7.952B	$8.517B	$8.517B
YoY Change	-6.63%	9.14%	9.14%
Accrued Expenses	$9.592B	$9.634B	$9.634B
YoY Change	-0.44%	-5.4%	-5.4%
Deferred Revenue
YoY Change
Short-Term Debt	$0.00	$0.00	$4.159B
YoY Change			50.63%
Long-Term Debt Due	$5.593B	$4.306B	$4.306B
YoY Change	29.89%	-36.47%	7.19%
Total Short-Term Liabilities	$43.63B	$42.12B	$42.13B
YoY Change	3.57%	3.85%	3.86%
LONG-TERM LIABILITIES
Long-Term Debt	$24.09B	$22.86B	$22.86B
YoY Change	5.39%	4.63%	4.63%
Other Long-Term Liabilities	$7.607B	$8.996B	$30.67B
YoY Change	-15.44%	-67.72%	11.55%
Total Long-Term Liabilities	$31.70B	$31.85B	$53.53B
YoY Change	-0.5%	-35.93%	8.49%
TOTAL LIABILITIES
Total Short-Term Liabilities	$43.63B	$42.12B	$42.13B
Total Long-Term Liabilities	$31.70B	$31.85B	$53.53B
Total Liabilities	$100.2B	$96.20B	$96.30B
YoY Change	4.19%	6.56%	6.52%
SHAREHOLDERS EQUITY
Retained Earnings	$117.6B	$104.9B
YoY Change	12.19%
Common Stock
YoY Change
Preferred Stock
YoY Change
Treasury Stock (at cost)	$123.1B	$111.0B
YoY Change	10.97%
Treasury Stock Shares	1.080B shares	1.019B shares
Shareholders Equity	$18.86B	$20.14B	$20.14B
YoY Change
Total Liabilities & Shareholders Equity	$119.2B	$116.4B	$116.4B
YoY Change	2.39%	2.63%	2.63%

Cashflow Statement

Concept	2012 Q4	2011 Q4	2011
OPERATING ACTIVITIES
Net Income	$5.833B	$5.487B	$15.86B
YoY Change	6.31%	3.63%	6.89%
Depreciation, Depletion And Amortization	$1.152B	$1.188B	$3.589B
YoY Change	-3.03%	-3.81%	-1.86%
Cash From Operating Activities	$6.345B	$7.097B	$19.85B
YoY Change	-10.6%	4.44%	1.52%
INVESTING ACTIVITIES
Capital Expenditures	-$1.159B	-$1.186B	$4.108B
YoY Change	-2.28%	-36.68%	-1.84%
Acquisitions			$1.811B
YoY Change			-69.42%
Other Investing Activities	-$2.933B	-$2.318B	$271.0M
YoY Change	26.53%	4.93%	-107.22%
Cash From Investing Activities	-$4.092B	-$3.504B	-$4.396B
YoY Change	16.78%	-14.16%	-48.32%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net			$15.05B
YoY Change			-2.14%
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-3.791B	-2.810B	-13.70B
YoY Change	34.91%	51.16%	10.19%
NET CHANGE
Cash From Operating Activities	6.345B	7.097B	19.85B
Cash From Investing Activities	-4.092B	-3.504B	-4.396B
Cash From Financing Activities	-3.791B	-2.810B	-13.70B
Net Change In Cash	-1.538B	783.0M	1.755B
YoY Change	-296.42%	-8.31%	-226.53%
FREE CASH FLOW
Cash From Operating Activities	$6.345B	$7.097B	$19.85B
Capital Expenditures	-$1.159B	-$1.186B	$4.108B
Free Cash Flow	$7.504B	$8.283B	$15.74B
YoY Change	-9.4%	-4.44%	2.44%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2013	us-gaap	Cost Of Goods Sold CostOfGoodsSold	12572000000	USD
CY2013	ibm	Expense And Other Income ExpenseAndOtherIncome	28981000000	USD
CY2013Q4	us-gaap	Marketable Securities Current MarketableSecuritiesCurrent	350000000	USD
CY2013	us-gaap	Revenues Revenues	99751000000	USD
CY2013	us-gaap	Cost Of Services CostOfServices	37564000000	USD
CY2013	ibm	Other Income And Expense OtherIncomeAndExpense	-327000000	USD
CY2013	us-gaap	Profit Loss ProfitLoss	16483000000	USD
CY2013	us-gaap	Financial Services Costs FinancialServicesCosts	1110000000	USD
CY2013	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax	43000000	USD
CY2013	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Before Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentBeforeTax	-1335000000	USD
CY2013	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax	-8767000000	USD
CY2013	us-gaap	Other Comprehensive Income Loss Before Tax OtherComprehensiveIncomeLossBeforeTax	7301000000	USD
CY2013	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Before Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesBeforeTax	-123000000	USD
CY2013	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Net Unamortized Gain Loss Arising During Period Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax	5369000000	USD
CY2013	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax	-3499000000	USD
CY2013	us-gaap	Other Comprehensive Income Loss Amortization Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Prior Service Cost Credit Before Tax OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditBeforeTax	-114000000	USD
CY2013	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesBeforeTax	166000000	USD
CY2013	us-gaap	Other Comprehensive Income Loss Finalization Of Pension And Non Pension Postretirement Plan Valuation Before Tax OtherComprehensiveIncomeLossFinalizationOfPensionAndNonPensionPostretirementPlanValuationBeforeTax	-3000000	USD
CY2012Q4	us-gaap	Marketable Securities Current MarketableSecuritiesCurrent	717000000	USD
CY2013Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	10465000000	USD
CY2013Q4	us-gaap	Other Receivables Net Current OtherReceivablesNetCurrent	1584000000	USD
CY2013Q4	us-gaap	Deferred Tax Assets Net Current DeferredTaxAssetsNetCurrent	1651000000	USD
CY2013Q4	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	4488000000	USD
CY2013Q4	us-gaap	Assets Current AssetsCurrent	51350000000	USD
CY2013Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	40475000000	USD
CY2013Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	26654000000	USD
CY2013Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	13821000000	USD
CY2013Q4	us-gaap	Prepaid Pension Costs PrepaidPensionCosts	5551000000	USD
CY2013Q4	us-gaap	Deferred Tax Assets Net Noncurrent DeferredTaxAssetsNetNoncurrent	3051000000	USD
CY2013Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	3871000000	USD
CY2013Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	4639000000	USD
CY2013Q4	us-gaap	Assets Assets	126223000000	USD
CY2012Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	10667000000	USD
CY2012Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	26505000000	USD
CY2012Q4	us-gaap	Assets Assets	119213000000	USD
CY2012Q4	us-gaap	Assets Current AssetsCurrent	49433000000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Net Current DeferredTaxAssetsNetCurrent	1415000000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Net Noncurrent DeferredTaxAssetsNetNoncurrent	3973000000	USD
CY2012Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	3787000000	USD
CY2012Q4	us-gaap	Notes And Loans Receivable Net Current NotesAndLoansReceivableNetCurrent	18038000000	USD
CY2012Q4	us-gaap	Notes And Loans Receivable Net Noncurrent NotesAndLoansReceivableNetNoncurrent	12812000000	USD
CY2012Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	5021000000	USD
CY2012Q4	us-gaap	Other Receivables Net Current OtherReceivablesNetCurrent	1873000000	USD
CY2012Q4	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	4024000000	USD
CY2012Q4	us-gaap	Prepaid Pension Costs PrepaidPensionCosts	945000000	USD
CY2012Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	40501000000	USD
CY2013	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	19524000000	USD
CY2013	us-gaap	Sales Revenue Goods Net SalesRevenueGoodsNet	40049000000	USD
CY2013	us-gaap	Financial Services Revenue FinancialServicesRevenue	2047000000	USD
CY2013Q4	ibm	Business Acquisition Accrued Payment BusinessAcquisitionAccruedPayment	205000000	USD
CY2013	us-gaap	Cost Of Revenue CostOfRevenue	51246000000	USD
CY2013	us-gaap	Gross Profit GrossProfit	48505000000	USD
CY2013	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	23502000000	USD
CY2013	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	6226000000	USD
CY2013	ibm	Intellectual Property And Custom Development Income IntellectualPropertyAndCustomDevelopmentIncome	822000000	USD
CY2013Q4	us-gaap	Available For Sale Securities Equity Securities Noncurrent AvailableForSaleSecuritiesEquitySecuritiesNoncurrent	18000000	USD
CY2013Q4	us-gaap	Derivative Fair Value Of Derivative Asset DerivativeFairValueOfDerivativeAsset	719000000	USD
CY2013Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	4687500000	shares
CY2013Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	2207522548	shares
CY2012Q4	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	256000000	USD
CY2012Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	13996000000	USD
CY2013	ibm	Common Stock Issued Under Employee Plan Value CommonStockIssuedUnderEmployeePlanValue	1216000000	USD
CY2013	ibm	Purchases Sales Treasury Stock Under Employee Plans Net PurchasesSalesTreasuryStockUnderEmployeePlansNet	-142000000	USD
CY2013Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	291000000	USD
CY2013Q4	us-gaap	Allowance For Notes And Loans Receivable Current AllowanceForNotesAndLoansReceivableCurrent	308000000	USD
CY2013Q4	us-gaap	Allowance For Doubtful Other Receivables Current AllowanceForDoubtfulOtherReceivablesCurrent	36000000	USD
CY2013Q4	us-gaap	Allowance For Notes And Loans Receivable Noncurrent AllowanceForNotesAndLoansReceivableNoncurrent	80000000	USD
CY2012Q4	us-gaap	Allowance For Doubtful Other Receivables Current AllowanceForDoubtfulOtherReceivablesCurrent	17000000	USD
CY2012Q4	us-gaap	Allowance For Notes And Loans Receivable Noncurrent AllowanceForNotesAndLoansReceivableNoncurrent	66000000	USD
CY2012Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	255000000	USD
CY2012Q4	us-gaap	Allowance For Notes And Loans Receivable Current AllowanceForNotesAndLoansReceivableCurrent	288000000	USD
CY2013Q4	us-gaap	Taxes Payable Current TaxesPayableCurrent	4633000000	USD
CY2013Q4	us-gaap	Debt Current DebtCurrent	6862000000	USD
CY2013Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	7461000000	USD
CY2013Q4	us-gaap	Deferred Compensation Liability Current DeferredCompensationLiabilityCurrent	3893000000	USD
CY2013Q4	us-gaap	Deferred Revenue Current DeferredRevenueCurrent	12557000000	USD
CY2013Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	4748000000	USD
CY2013Q4	us-gaap	Liabilities Current LiabilitiesCurrent	40154000000	USD
CY2013Q4	us-gaap	Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent	16242000000	USD
CY2013Q4	us-gaap	Deferred Revenue Noncurrent DeferredRevenueNoncurrent	4108000000	USD
CY2013Q4	us-gaap	Liabilities Liabilities	103294000000	USD
CY2013Q4	us-gaap	Common Stocks Including Additional Paid In Capital CommonStocksIncludingAdditionalPaidInCapital	51594000000	USD
CY2013Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	130042000000	USD
CY2013Q4	us-gaap	Treasury Stock Value TreasuryStockValue	137242000000	USD
CY2013Q4	us-gaap	Stockholders Equity StockholdersEquity	22792000000	USD
CY2013Q4	us-gaap	Minority Interest MinorityInterest	137000000	USD
CY2013Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	22929000000	USD
CY2013Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	126223000000	USD
CY2013Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.2
CY2013Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	1153131611	shares
CY2012Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.2
CY2012Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	4687500000	shares
CY2012Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	2197561159	shares
CY2012Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	1080193483	shares
CY2012Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	7952000000	USD
CY2012Q4	us-gaap	Common Stocks Including Additional Paid In Capital CommonStocksIncludingAdditionalPaidInCapital	50110000000	USD
CY2012Q4	us-gaap	Debt Current DebtCurrent	9181000000	USD
CY2012Q4	us-gaap	Deferred Compensation Liability Current DeferredCompensationLiabilityCurrent	4745000000	USD
CY2012Q4	us-gaap	Deferred Revenue Current DeferredRevenueCurrent	11952000000	USD
CY2012Q4	us-gaap	Deferred Revenue Noncurrent DeferredRevenueNoncurrent	4491000000	USD
CY2012Q4	us-gaap	Liabilities Liabilities	100229000000	USD
CY2012Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	119213000000	USD
CY2012Q4	us-gaap	Liabilities Current LiabilitiesCurrent	43625000000	USD
CY2012Q4	us-gaap	Minority Interest MinorityInterest	124000000	USD
CY2012Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	4847000000	USD
CY2012Q4	us-gaap	Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent	20418000000	USD
CY2012Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	117641000000	USD
CY2012Q4	us-gaap	Stockholders Equity StockholdersEquity	18860000000	USD
CY2012Q4	us-gaap	Taxes Payable Current TaxesPayableCurrent	4948000000	USD
CY2012Q4	us-gaap	Treasury Stock Value TreasuryStockValue	123131000000	USD
CY2013Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	7000000	USD
CY2013Q4	ibm	Available For Sale Debt Securities Gross Unrealized Gain Accumulated In Investment AvailableForSaleDebtSecuritiesGrossUnrealizedGainAccumulatedInInvestment	1000000	USD
CY2013Q4	us-gaap	Available For Sale Securities Debt Securities Noncurrent AvailableForSaleSecuritiesDebtSecuritiesNoncurrent	9000000	USD
CY2013Q4	us-gaap	Available For Sale Equity Securities Amortized Cost Basis AvailableForSaleEquitySecuritiesAmortizedCostBasis	20000000	USD
CY2013Q4	ibm	Available For Sale Equity Securities Gross Unrealized Gain Accumulated In Investment AvailableForSaleEquitySecuritiesGrossUnrealizedGainAccumulatedInInvestment	2000000	USD
CY2013Q4	ibm	Available For Sale Equity Investments Gross Unrealized Losses AvailableForSaleEquityInvestmentsGrossUnrealizedLosses	4000000	USD
CY2012Q4	us-gaap	Available For Sale Securities Equity Securities Noncurrent AvailableForSaleSecuritiesEquitySecuritiesNoncurrent	34000000	USD
CY2012Q4	us-gaap	Available For Sale Securities Debt Securities Noncurrent AvailableForSaleSecuritiesDebtSecuritiesNoncurrent	10000000	USD
CY2012Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	8000000	USD
CY2012Q4	ibm	Available For Sale Debt Securities Gross Unrealized Gain Accumulated In Investment AvailableForSaleDebtSecuritiesGrossUnrealizedGainAccumulatedInInvestment	2000000	USD
CY2012Q4	us-gaap	Available For Sale Equity Securities Amortized Cost Basis AvailableForSaleEquitySecuritiesAmortizedCostBasis	31000000	USD
CY2012Q4	ibm	Available For Sale Equity Securities Gross Unrealized Gain Accumulated In Investment AvailableForSaleEquitySecuritiesGrossUnrealizedGainAccumulatedInInvestment	4000000	USD
CY2012Q4	ibm	Available For Sale Equity Investments Gross Unrealized Losses AvailableForSaleEquityInvestmentsGrossUnrealizedLosses	1000000	USD
CY2013	ibm	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax And Subsequent Changes OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTaxAndSubsequentChanges	0	USD
CY2012Q4	us-gaap	Derivative Fair Value Of Derivative Asset DerivativeFairValueOfDerivativeAsset	918000000	USD
CY2013Q4	us-gaap	Financial Liabilities Fair Value Disclosure FinancialLiabilitiesFairValueDisclosure	6802000000	USD
CY2012Q4	us-gaap	Financial Liabilities Fair Value Disclosure FinancialLiabilitiesFairValueDisclosure	4116000000	USD
CY2013	us-gaap	Derivative Gain Loss On Derivative Net DerivativeGainLossOnDerivativeNet	-347000000	USD
CY2013	us-gaap	Change In Unrealized Gain Loss On Hedged Item In Fair Value Hedge1 ChangeInUnrealizedGainLossOnHedgedItemInFairValueHedge1	340000000	USD
CY2013	us-gaap	Derivative Instruments Gain Loss Recognized In Other Comprehensive Income Effective Portion Net DerivativeInstrumentsGainLossRecognizedInOtherComprehensiveIncomeEffectivePortionNet	216000000	USD
CY2013	us-gaap	Derivative Instruments Gain Loss Reclassified From Accumulated Oci Into Income Effective Portion Net DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet	167000000	USD
CY2013	us-gaap	Derivative Instruments Gain Loss Recognized In Income Ineffective Portion And Amount Excluded From Effectiveness Testing Net DerivativeInstrumentsGainLossRecognizedInIncomeIneffectivePortionAndAmountExcludedFromEffectivenessTestingNet	3000000	USD
CY2013Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	365000000	USD
CY2013Q4	us-gaap	Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment	93000000	USD
CY2013Q4	us-gaap	Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1	272000000	USD
CY2012Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	318000000	USD
CY2013Q4	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	318000000	USD
CY2013Q4	us-gaap	Financing Receivable Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	23219000000	USD
CY2012Q4	ibm	Financing Receivables Gross FinancingReceivablesGross	22510000000	USD
CY2012Q4	us-gaap	Financing Receivable Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	22254000000	USD
CY2011Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	307000000	USD
CY2012	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	15000000	USD
CY2012	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	-28000000	USD
CY2012	ibm	Financing Receivable Allowance For Credit Losses Other FinancingReceivableAllowanceForCreditLossesOther	2000000	USD
CY2012Q4	us-gaap	Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment	98000000	USD
CY2012Q4	us-gaap	Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1	220000000	USD
CY2013Q4	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	191000000	USD
CY2012Q4	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	139000000	USD
CY2013Q4	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	201000000	USD
CY2013Q4	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	183000000	USD
CY2013	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	0	USD
CY2013	us-gaap	Impaired Financing Receivable Interest Income Cash Basis Method ImpairedFinancingReceivableInterestIncomeCashBasisMethod	0	USD
CY2013	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	173000000	USD
CY2013Q4	us-gaap	Financing Receivable Recorded Investment Equal To Greater Than90 Days Past Due FinancingReceivableRecordedInvestmentEqualToGreaterThan90DaysPastDue	68000000	USD
CY2013Q4	ibm	Financing Receivables Current FinancingReceivablesCurrent	23469000000	USD
CY2013Q4	ibm	Financing Receivables Gross FinancingReceivablesGross	23537000000	USD
CY2013Q4	us-gaap	Financing Receivable Recorded Investment90 Days Past Due And Still Accruing FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing	41000000	USD
CY2012Q4	us-gaap	Financing Receivable Recorded Investment Equal To Greater Than90 Days Past Due FinancingReceivableRecordedInvestmentEqualToGreaterThan90DaysPastDue	82000000	USD
CY2012Q4	ibm	Financing Receivables Current FinancingReceivablesCurrent	22428000000	USD
CY2012Q4	us-gaap	Financing Receivable Recorded Investment90 Days Past Due And Still Accruing FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing	52000000	USD
CY2013Q4	us-gaap	Receivables Held For Sale Amount ReceivablesHeldForSaleAmount	0	USD
CY2012Q4	us-gaap	Receivables Held For Sale Amount ReceivablesHeldForSaleAmount	0	USD
CY2012Q4	us-gaap	Financing Receivable Modifications Recorded Investment FinancingReceivableModificationsRecordedInvestment	0	USD
CY2013Q4	us-gaap	Financing Receivable Modifications Recorded Investment FinancingReceivableModificationsRecordedInvestment	0	USD
CY2013Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	6930000000	USD
CY2013Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	3059000000	USD
CY2013Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Remainder Of Fiscal Year FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear	1267000000	USD
CY2013Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	884000000	USD
CY2013Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	660000000	USD
CY2013Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	477000000	USD
CY2013Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	322000000	USD
CY2012	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	2894000000	USD
CY2012	us-gaap	Goodwill Purchase Accounting Adjustments GoodwillPurchaseAccountingAdjustments	-30000000	USD
CY2012	us-gaap	Goodwill Written Off Related To Sale Of Business Unit GoodwillWrittenOffRelatedToSaleOfBusinessUnit	22000000	USD
CY2012	us-gaap	Goodwill Translation And Purchase Accounting Adjustments GoodwillTranslationAndPurchaseAccountingAdjustments	192000000	USD
CY2013Q4	us-gaap	Goodwill Impaired Accumulated Impairment Loss GoodwillImpairedAccumulatedImpairmentLoss	0	USD
CY2012Q4	us-gaap	Goodwill Impaired Accumulated Impairment Loss GoodwillImpairedAccumulatedImpairmentLoss	0	USD
CY2012	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	USD
CY2013Q4	us-gaap	Loss Contingency Estimate Of Possible Loss LossContingencyEstimateOfPossibleLoss	700000000	USD
CY2013	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	-4000000	USD
CY2013	ibm	Other Comprehensive Income Available For Sale Securities Subsequent Changes In Previously Impaired Securities Arising During Period Before Tax OtherComprehensiveIncomeAvailableForSaleSecuritiesSubsequentChangesInPreviouslyImpairedSecuritiesArisingDuringPeriodBeforeTax	4000000	USD
CY2013	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax	-8000000	USD
CY2013	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	5000000	USD
CY2013	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	614000000	USD
CY2013	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	213000000	USD
CY2013	us-gaap	Allocated Share Based Compensation Expense Net Of Tax AllocatedShareBasedCompensationExpenseNetOfTax	402000000	USD
CY2013	us-gaap	Sales Revenue Services Net SalesRevenueServicesNet	57655000000	USD
CY2013	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	6857000000	USD
CY2012	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	9668000000	USD
CY2011	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	9716000000	USD
CY2013	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	12667000000	USD
CY2012	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	12234000000	USD
CY2011	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	11287000000	USD
CY2013	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	19524000000	USD
CY2012	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	21902000000	USD
CY2011	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	21003000000	USD
CY2010Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	5293000000	USD
CY2013	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	829000000	USD
CY2012	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	401000000	USD
CY2011	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	672000000	USD
CY2013	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	417000000	USD
CY2012	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	215000000	USD
CY2011	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	379000000	USD
CY2013	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	2201000000	USD
CY2012	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	425000000	USD
CY2011	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	538000000	USD
CY2013	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	259000000	USD
CY2011	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	231000000	USD
CY2013	ibm	Rental Expense RentalExpense	1759000000	USD
CY2012	ibm	Rental Expense RentalExpense	1767000000	USD
CY2011	ibm	Rental Expense RentalExpense	1836000000	USD
CY2013Q4	us-gaap	Operating Leases Future Minimum Payments Due Current OperatingLeasesFutureMinimumPaymentsDueCurrent	1492000000	USD
CY2013Q4	us-gaap	Operating Leases Future Minimum Payments Due In Two Years OperatingLeasesFutureMinimumPaymentsDueInTwoYears	1286000000	USD
CY2013Q4	us-gaap	Operating Leases Future Minimum Payments Due In Three Years OperatingLeasesFutureMinimumPaymentsDueInThreeYears	1016000000	USD
CY2013Q4	us-gaap	Operating Leases Future Minimum Payments Due In Four Years OperatingLeasesFutureMinimumPaymentsDueInFourYears	799000000	USD
CY2013Q4	us-gaap	Operating Leases Future Minimum Payments Due In Five Years OperatingLeasesFutureMinimumPaymentsDueInFiveYears	620000000	USD
CY2013Q4	us-gaap	Operating Leases Future Minimum Payments Due Thereafter OperatingLeasesFutureMinimumPaymentsDueThereafter	778000000	USD
CY2013Q4	ibm	Operating Leases Vacant Space Future Minimum Payments Due Current OperatingLeasesVacantSpaceFutureMinimumPaymentsDueCurrent	24000000	USD
CY2013Q4	ibm	Operating Leases Vacant Space Future Minimum Payments Due In Two Years OperatingLeasesVacantSpaceFutureMinimumPaymentsDueInTwoYears	16000000	USD
CY2013Q4	ibm	Operating Leases Vacant Space Future Minimum Payments Due In Three Years OperatingLeasesVacantSpaceFutureMinimumPaymentsDueInThreeYears	6000000	USD
CY2013Q4	ibm	Operating Leases Vacant Space Future Minimum Payments Due In Four Years OperatingLeasesVacantSpaceFutureMinimumPaymentsDueInFourYears	4000000	USD
CY2013Q4	ibm	Operating Leases Vacant Space Future Minimum Payments Due In Five Years OperatingLeasesVacantSpaceFutureMinimumPaymentsDueInFiveYears	1000000	USD
CY2013Q4	ibm	Operating Leases Vacant Space Future Minimum Payments Due Thereafter OperatingLeasesVacantSpaceFutureMinimumPaymentsDueThereafter	0	USD
CY2013Q4	us-gaap	Future Minimum Sublease Rentals Sale Leaseback Transactions Within One Year FutureMinimumSubleaseRentalsSaleLeasebackTransactionsWithinOneYear	22000000	USD
CY2013Q4	us-gaap	Future Minimum Sublease Rentals Sale Leaseback Transactions Within Two Years FutureMinimumSubleaseRentalsSaleLeasebackTransactionsWithinTwoYears	16000000	USD
CY2013Q4	us-gaap	Future Minimum Sublease Rentals Sale Leaseback Transactions Within Three Years FutureMinimumSubleaseRentalsSaleLeasebackTransactionsWithinThreeYears	14000000	USD
CY2013Q4	us-gaap	Future Minimum Sublease Rentals Sale Leaseback Transactions Within Four Years FutureMinimumSubleaseRentalsSaleLeasebackTransactionsWithinFourYears	9000000	USD
CY2013Q4	us-gaap	Future Minimum Sublease Rentals Sale Leaseback Transactions Within Five Years FutureMinimumSubleaseRentalsSaleLeasebackTransactionsWithinFiveYears	4000000	USD
CY2013Q4	us-gaap	Future Minimum Sublease Rentals Sale Leaseback Transactions Thereafter FutureMinimumSubleaseRentalsSaleLeasebackTransactionsThereafter	7000000	USD
CY2013Q4	us-gaap	Capital Leases Future Minimum Payments Due Current CapitalLeasesFutureMinimumPaymentsDueCurrent	16000000	USD
CY2013Q4	us-gaap	Capital Leases Future Minimum Payments Due In Two Years CapitalLeasesFutureMinimumPaymentsDueInTwoYears	12000000	USD
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CY2013Q4	us-gaap	Capital Leases Future Minimum Payments Due In Four Years CapitalLeasesFutureMinimumPaymentsDueInFourYears	3000000	USD
CY2013Q4	us-gaap	Capital Leases Future Minimum Payments Due In Five Years CapitalLeasesFutureMinimumPaymentsDueInFiveYears	9000000	USD
CY2013Q4	us-gaap	Capital Leases Future Minimum Payments Due Thereafter CapitalLeasesFutureMinimumPaymentsDueThereafter	5000000	USD
CY2013	ibm	Scientific Research Software Related Expenses And In Process Research And Development Expenses ScientificResearchSoftwareRelatedExpensesAndInProcessResearchAndDevelopmentExpenses	5959000000	USD
CY2012	ibm	Scientific Research Software Related Expenses And In Process Research And Development Expenses ScientificResearchSoftwareRelatedExpensesAndInProcessResearchAndDevelopmentExpenses	6034000000	USD
CY2011	ibm	Scientific Research Software Related Expenses And In Process Research And Development Expenses ScientificResearchSoftwareRelatedExpensesAndInProcessResearchAndDevelopmentExpenses	5990000000	USD
CY2013	us-gaap	Research And Development Expense Software Excluding Acquired In Process Cost ResearchAndDevelopmentExpenseSoftwareExcludingAcquiredInProcessCost	3077000000	USD
CY2012	us-gaap	Research And Development Expense Software Excluding Acquired In Process Cost ResearchAndDevelopmentExpenseSoftwareExcludingAcquiredInProcessCost	3078000000	USD
CY2011	us-gaap	Research And Development Expense Software Excluding Acquired In Process Cost ResearchAndDevelopmentExpenseSoftwareExcludingAcquiredInProcessCost	3097000000	USD
CY2013	ibm	Product Related Engineering Expenses ProductRelatedEngineeringExpenses	267000000	USD
CY2012	ibm	Product Related Engineering Expenses ProductRelatedEngineeringExpenses	268000000	USD
CY2011	ibm	Product Related Engineering Expenses ProductRelatedEngineeringExpenses	267000000	USD
CY2013	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	1406000000	USD
CY2012	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	1361000000	USD
CY2011	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	268000000	USD
CY2013	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-652000000	USD
CY2012	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	403000000	USD
CY2011	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	909000000	USD
CY2013	us-gaap	Federal Income Tax Expense Benefit Continuing Operations FederalIncomeTaxExpenseBenefitContinuingOperations	754000000	USD
CY2012	us-gaap	Federal Income Tax Expense Benefit Continuing Operations FederalIncomeTaxExpenseBenefitContinuingOperations	1764000000	USD
CY2011	us-gaap	Federal Income Tax Expense Benefit Continuing Operations FederalIncomeTaxExpenseBenefitContinuingOperations	1177000000	USD
CY2013	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	178000000	USD
CY2012	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	134000000	USD
CY2011	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	429000000	USD
CY2013	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-321000000	USD
CY2012	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	289000000	USD
CY2011	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	81000000	USD
CY2013	us-gaap	State And Local Income Tax Expense Benefit Continuing Operations StateAndLocalIncomeTaxExpenseBenefitContinuingOperations	-143000000	USD
CY2012	us-gaap	State And Local Income Tax Expense Benefit Continuing Operations StateAndLocalIncomeTaxExpenseBenefitContinuingOperations	423000000	USD
CY2011	us-gaap	State And Local Income Tax Expense Benefit Continuing Operations StateAndLocalIncomeTaxExpenseBenefitContinuingOperations	510000000	USD
CY2013	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	3067000000	USD
CY2012	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	3006000000	USD
CY2011	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	3239000000	USD
CY2013	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	-637000000	USD
CY2012	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	105000000	USD
CY2011	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	222000000	USD
CY2013	us-gaap	Foreign Income Tax Expense Benefit Continuing Operations ForeignIncomeTaxExpenseBenefitContinuingOperations	2430000000	USD
CY2012	us-gaap	Foreign Income Tax Expense Benefit Continuing Operations ForeignIncomeTaxExpenseBenefitContinuingOperations	3111000000	USD
CY2011	us-gaap	Foreign Income Tax Expense Benefit Continuing Operations ForeignIncomeTaxExpenseBenefitContinuingOperations	3461000000	USD
CY2013	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	3041000000	USD
CY2013	ibm	Taxes Excluding Income Taxes TaxesExcludingIncomeTaxes	4198000000	USD
CY2012	ibm	Taxes Excluding Income Taxes TaxesExcludingIncomeTaxes	4331000000	USD
CY2011	ibm	Taxes Excluding Income Taxes TaxesExcludingIncomeTaxes	4289000000	USD
CY2013	ibm	Taxes Included In Income From Continuing Operations TaxesIncludedInIncomeFromContinuingOperations	7239000000	USD
CY2012	ibm	Taxes Included In Income From Continuing Operations TaxesIncludedInIncomeFromContinuingOperations	9629000000	USD
CY2011	ibm	Taxes Included In Income From Continuing Operations TaxesIncludedInIncomeFromContinuingOperations	9437000000	USD
CY2013Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	626000000	USD
CY2013	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2013
CY2013	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2013	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2013	dei	Entity Registrant Name EntityRegistrantName	INTERNATIONAL BUSINESS MACHINES CORP
CY2013	dei	Entity Central Index Key EntityCentralIndexKey	0000051143
CY2013	dei	Document Type DocumentType	10-K
CY2013	dei	Document Period End Date DocumentPeriodEndDate	2013-12-31
CY2013	dei	Amendment Flag AmendmentFlag	false
CY2013	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2013	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
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CY2011	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesBeforeTax	-511000000	USD
CY2012	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Before Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesBeforeTax	-220000000	USD
CY2011	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax	-266000000	USD
CY2012	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesBeforeTax	253000000	USD
CY2011	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Before Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesBeforeTax	245000000	USD
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CY2012	us-gaap	Other Comprehensive Income Loss Finalization Of Pension And Non Pension Postretirement Plan Valuation Before Tax OtherComprehensiveIncomeLossFinalizationOfPensionAndNonPensionPostretirementPlanValuationBeforeTax	-2000000	USD
CY2011	us-gaap	Other Comprehensive Income Loss Finalization Of Pension And Non Pension Postretirement Plan Valuation Before Tax OtherComprehensiveIncomeLossFinalizationOfPensionAndNonPensionPostretirementPlanValuationBeforeTax	11000000	USD
CY2012	us-gaap	Other Comprehensive Income Loss Amortization Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Prior Service Cost Credit Before Tax OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditBeforeTax	-148000000	USD
CY2011	us-gaap	Other Comprehensive Income Loss Amortization Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Prior Service Cost Credit Before Tax OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditBeforeTax	-157000000	USD
CY2012	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax	-2457000000	USD
CY2011	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax	-1847000000	USD
CY2012	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax	5182000000	USD
CY2011	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax	3790000000	USD
CY2012	us-gaap	Other Comprehensive Income Loss Before Tax OtherComprehensiveIncomeLossBeforeTax	-5460000000	USD
CY2011	us-gaap	Other Comprehensive Income Loss Before Tax OtherComprehensiveIncomeLossBeforeTax	-4479000000	USD
CY2012	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Before Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentBeforeTax	-44000000	USD
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CY2012	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	8000000	USD
CY2011	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	-14000000	USD
CY2012	ibm	Other Comprehensive Income Available For Sale Securities Subsequent Changes In Previously Impaired Securities Arising During Period Before Tax OtherComprehensiveIncomeAvailableForSaleSecuritiesSubsequentChangesInPreviouslyImpairedSecuritiesArisingDuringPeriodBeforeTax	20000000	USD
CY2011	ibm	Other Comprehensive Income Available For Sale Securities Subsequent Changes In Previously Impaired Securities Arising During Period Before Tax OtherComprehensiveIncomeAvailableForSaleSecuritiesSubsequentChangesInPreviouslyImpairedSecuritiesArisingDuringPeriodBeforeTax	4000000	USD
CY2012	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax	-14000000	USD
CY2011	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax	-241000000	USD
CY2013	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	8000000	USD
CY2012	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	42000000	USD
CY2011	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	231000000	USD
CY2012	us-gaap	Sales Revenue Services Net SalesRevenueServicesNet	59453000000	USD
CY2011	us-gaap	Sales Revenue Services Net SalesRevenueServicesNet	60721000000	USD
CY2012	us-gaap	Sales Revenue Goods Net SalesRevenueGoodsNet	43014000000	USD
CY2011	us-gaap	Sales Revenue Goods Net SalesRevenueGoodsNet	44063000000	USD
CY2012	us-gaap	Financial Services Revenue FinancialServicesRevenue	2040000000	USD
CY2011	us-gaap	Financial Services Revenue FinancialServicesRevenue	2132000000	USD
CY2012	us-gaap	Cost Of Services CostOfServices	39166000000	USD
CY2011	us-gaap	Cost Of Services CostOfServices	40740000000	USD
CY2012	us-gaap	Cost Of Goods Sold CostOfGoodsSold	13956000000	USD
CY2011	us-gaap	Cost Of Goods Sold CostOfGoodsSold	14973000000	USD
CY2012	us-gaap	Financial Services Costs FinancialServicesCosts	1087000000	USD
CY2011	us-gaap	Financial Services Costs FinancialServicesCosts	1065000000	USD
CY2012	us-gaap	Cost Of Revenue CostOfRevenue	54209000000	USD
CY2011	us-gaap	Cost Of Revenue CostOfRevenue	56778000000	USD
CY2012	us-gaap	Gross Profit GrossProfit	50298000000	USD
CY2011	us-gaap	Gross Profit GrossProfit	50138000000	USD
CY2012	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	23553000000	USD
CY2011	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	23594000000	USD
CY2012	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	6302000000	USD
CY2011	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	6258000000	USD
CY2012	us-gaap	Revenues Revenues	104507000000	USD
CY2011	us-gaap	Revenues Revenues	106916000000	USD
CY2012	ibm	Intellectual Property And Custom Development Income IntellectualPropertyAndCustomDevelopmentIncome	1074000000	USD
CY2011	ibm	Intellectual Property And Custom Development Income IntellectualPropertyAndCustomDevelopmentIncome	1108000000	USD
CY2012	ibm	Other Income And Expense OtherIncomeAndExpense	-843000000	USD
CY2011	ibm	Other Income And Expense OtherIncomeAndExpense	-20000000	USD
CY2011	us-gaap	Interest Expense InterestExpense	411000000	USD
CY2012	ibm	Expense And Other Income ExpenseAndOtherIncome	28396000000	USD
CY2011	ibm	Expense And Other Income ExpenseAndOtherIncome	29135000000	USD
CY2012	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	21902000000	USD
CY2011	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	21003000000	USD
CY2012	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	5298000000	USD
CY2011	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	5148000000	USD
CY2012	us-gaap	Profit Loss ProfitLoss	16604000000	USD
CY2013Q4	us-gaap	Notes And Loans Receivable Net Current NotesAndLoansReceivableNetCurrent	19787000000	USD
CY2013Q4	us-gaap	Notes And Loans Receivable Net Noncurrent NotesAndLoansReceivableNetNoncurrent	12755000000	USD
CY2013Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-21602000000	USD
CY2012Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-25759000000	USD
CY2013Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2012Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2013	us-gaap	Use Of Estimates UseOfEstimates	<div><p style='text-align:left;margin-top:0pt;margin-bottom:0pt;' ><font style='font-family:Times New Roman;font-size:10pt;font-weight:bold;margin-left:0pt;' >Use of Estimates</font></p><p style='text-align:left;margin-top:0pt;margin-bottom:0pt;' ><font style='font-family:Times New Roman;font-size:10pt;margin-left:0pt;' > </font></p><p style='text-align:left;margin-top:0pt;margin-bottom:0pt;' ><font style='font-family:Times New Roman;font-size:10pt;margin-left:0pt;' >The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the amounts of assets,</font><font style='font-family:Times New Roman;font-size:10pt;' > liabilities, revenue, costs, expenses and other comprehensive income/(loss) (OCI) that are reported in the Consolidated Financial Statements and accompanying disclosures. These estimates are based on management’s best knowledge of current events, historic</font><font style='font-family:Times New Roman;font-size:10pt;' >al experience, actions that the company may undertake in the future and on various other assumptions that are believed to be reasonable under the circumstances. As a result, actual results may be different from these estimates. See “Critical Accounting Est</font><font style='font-family:Times New Roman;font-size:10pt;' >imates” on pages 67</font><font style='font-family:Times New Roman;font-size:10pt;' > to 70</font><font style='font-family:Times New Roman;font-size:10pt;' > </font><font style='font-family:Times New Roman;font-size:10pt;' >for a discussion of the company’s critical accounting estimates.</font></p></div>
CY2013	us-gaap	Revenue Recognition Multiple Element Arrangements RevenueRecognitionMultipleElementArrangements	<div><p style='text-align:left;margin-top:0pt;margin-bottom:0pt;' ><font style='font-family:Times New Roman;font-size:10pt;margin-left:0pt;' > </font></p><p style='text-align:left;margin-top:0pt;margin-bottom:0pt;' ><font style='font-family:Times New Roman;font-size:10pt;font-weight:bold;margin-left:0pt;' >Multiple-Deliverable Arrangements</font></p><p style='text-align:left;margin-top:0pt;margin-bottom:0pt;' ><font style='font-family:Times New Roman;font-size:10pt;margin-left:0pt;' > </font></p><p style='text-align:left;margin-top:0pt;margin-bottom:0pt;' ><font style='font-family:Times New Roman;font-size:10pt;margin-left:0pt;' >The company enters into revenue arrangements that may consist of multiple deliverables of its products and services based on the n</font><font style='font-family:Times New Roman;font-size:10pt;' >eeds of its clients. These arrangements may include any combination of services, software, hardware and/or financing. For example, a client may purchase a server that includes operating system software. In addition, the arrangement may include post-contrac</font><font style='font-family:Times New Roman;font-size:10pt;' >t support for the software and a contract for post-warranty maintenance service for the hardware. These types of arrangements can also include financing provided by the company. These arrangements consist of multiple deliverables, with the hardware and sof</font><font style='font-family:Times New Roman;font-size:10pt;' >tware delivered in one reporting period and the software support and hardware maintenance services delivered across multiple reporting periods. In another example, a client may outsource the running of its datacenter operations to the company on a long-ter</font><font style='font-family:Times New Roman;font-size:10pt;' >m, multiple-year basis and periodically purchase servers and/or software products from the company to upgrade or expand its facility. The outsourcing services are provided on a continuous basis across multiple reporting periods and the hardware and softwar</font><font style='font-family:Times New Roman;font-size:10pt;' >e products are delivered in one reporting period. To the extent that a deliverable in a multiple-deliverable arrangement is subject to specific accounting guidance that deliverable is accounted for in accordance with such specific guidance. Examples of suc</font><font style='font-family:Times New Roman;font-size:10pt;' >h arrangements may include leased hardware which is subject to specific leasing guidance or software which is subject to specific software revenue recognition guidance on whether and/or how to separate multiple-deliverable arrangements into separate units </font><font style='font-family:Times New Roman;font-size:10pt;' >of accounting (separability) and how to allocate the arrangement consideration among those separate units of accounting (allocation). For all other deliverables in multiple-deliverable arrangements, the guidance below is applied for separability and alloca</font><font style='font-family:Times New Roman;font-size:10pt;' >tion. A multiple-deliverable arrangement is separated into more than one unit of accounting if the following criteria are met:</font></p><p style='text-align:left;margin-top:0pt;margin-bottom:0pt;' ><font style='font-family:Times New Roman;font-size:10pt;margin-left:0pt;' > </font></p><p style='text-align:left;margin-top:0pt;margin-bottom:0pt;' ><font style='font-family:Symbol;font-size:10pt;margin-left:0pt;' ></font><font style='font-family:Times New Roman;font-size:3pt;' >                  </font><font style='font-family:Times New Roman;font-size:10pt;' >The delivered item(s) has value to the client on a stand-alone basis; and</font></p><p style='text-align:left;margin-top:0pt;margin-bottom:0pt;' ><font style='font-family:Symbol;font-size:10pt;margin-left:0pt;' ></font><font style='font-family:Times New Roman;font-size:3pt;' >                  </font><font style='font-family:Times New Roman;font-size:10pt;' >If the arrangem</font><font style='font-family:Times New Roman;font-size:10pt;' >ent includes a general right of return relative to the delivered item(s), delivery or performance of the undelivered item(s) is considered probable and substantially in the control of the company.</font></p><p style='text-align:left;margin-top:0pt;margin-bottom:0pt;' ><font style='font-family:Times New Roman;font-size:10pt;margin-left:0pt;' > </font></p><p style='text-align:left;margin-top:0pt;margin-bottom:0pt;' ><font style='font-family:Times New Roman;font-size:10pt;margin-left:0pt;' >If these criteria are not met, the arrangement is account</font><font style='font-family:Times New Roman;font-size:10pt;' >ed for as one unit of accounting which would result in revenue being recognized ratably over the contract term or being deferred until the earlier of when such criteria are met or when the last undelivered element is delivered. If these criteria are met fo</font><font style='font-family:Times New Roman;font-size:10pt;' >r each element and there is a relative selling price for all units of accounting in an arrangement, the arrangement consideration is allocated to the separate units of accounting based on each unit’s relative selling price. The following revenue policies a</font><font style='font-family:Times New Roman;font-size:10pt;' >re then applied to each unit of accounting, as applicable.</font></p><p style='text-align:left;margin-top:0pt;margin-bottom:0pt;' ><font style='font-family:Times New Roman;font-size:10pt;margin-left:0pt;' > </font></p><p style='text-align:left;margin-top:0pt;margin-bottom:0pt;' ><font style='font-family:Times New Roman;font-size:10pt;margin-left:16pt;' >Revenue from the company’s business analytics, Smarter Planet and cloud offerings follow the specific revenue recognition policies for multiple deliverable arrangements and for each major categor</font><font style='font-family:Times New Roman;font-size:10pt;' >y of revenue depending on the type of offering which can be comprised of services, hardware and/or software.</font></p></div>
CY2013	us-gaap	Revenue Recognition Sales Of Services RevenueRecognitionSalesOfServices	<div><p style='text-align:left;margin-top:0pt;margin-bottom:0pt;' ><font style='font-family:Times New Roman;font-size:10pt;font-weight:bold;margin-left:0pt;' >Services</font></p><p style='text-align:left;margin-top:0pt;margin-bottom:0pt;' ><font style='font-family:Times New Roman;font-size:10pt;margin-left:0pt;' > </font></p><p style='text-align:left;margin-top:0pt;margin-bottom:0pt;' ><font style='font-family:Times New Roman;font-size:10pt;margin-left:0pt;' >The company’s primary services offerings include information technology (IT) datacenter and business process outsourcing, application </font><font style='font-family:Times New Roman;font-size:10pt;' >management services, consulting and systems integration, technology infrastructure and system maintenance, Web hosting and the design and development of complex IT systems to a client’s specifications (design and build). These services are provided on a ti</font><font style='font-family:Times New Roman;font-size:10pt;' >me-and-material basis, as a fixed-price contract or as a fixed-price per measure of output contract and the contract terms range from less than one year to over 10 years.</font></p><p style='text-align:left;margin-top:0pt;margin-bottom:0pt;' ><font style='font-family:Times New Roman;font-size:10pt;margin-left:0pt;' > </font></p><p style='text-align:left;margin-top:0pt;margin-bottom:0pt;' ><font style='font-family:Times New Roman;font-size:10pt;margin-left:16pt;' >Revenue from IT datacenter and business process outsourcing contracts is recognized</font><font style='font-family:Times New Roman;font-size:10pt;' > in the period the services are provided using either an objective measure of output or on a straight-line basis over the term of the contract. Under the output method, the amount of revenue recognized is based on the services delivered in the period.</font></p><p style='text-align:left;margin-top:0pt;margin-bottom:0pt;' ><font style='font-family:Times New Roman;font-size:10pt;margin-left:0pt;' > </font></p><p style='text-align:left;margin-top:0pt;margin-bottom:0pt;' ><font style='font-family:Times New Roman;font-size:10pt;margin-left:16pt;' >Re</font><font style='font-family:Times New Roman;font-size:10pt;' >venue from application management services, technology infrastructure and system maintenance and Web hosting contracts is recognized on a straight-line basis over the terms of the contracts. Revenue from time-and-material contracts is recognized as labor h</font><font style='font-family:Times New Roman;font-size:10pt;' >ours are delivered and direct expenses are incurred. Revenue related to extended warranty and product maintenance contracts is recognized on a straight-line basis over the delivery period.</font></p><p style='text-align:left;margin-top:0pt;margin-bottom:0pt;' ><font style='font-family:Times New Roman;font-size:10pt;margin-left:0pt;' > </font></p><p style='text-align:left;margin-top:0pt;margin-bottom:0pt;' ><font style='font-family:Times New Roman;font-size:10pt;margin-left:16pt;' >Revenue from fixed-price design and build contracts is recognized</font><font style='font-family:Times New Roman;font-size:10pt;' > under the percentage-of-completion (POC) method. Under the POC method, revenue is recognized based on the labor costs incurred to date as a percentage of the total estimated labor costs to fulfill the contract. If circumstances arise that change the origi</font><font style='font-family:Times New Roman;font-size:10pt;' >nal estimates of revenues, costs, or extent of progress toward completion, revisions to the estimates are made. These revisions may result in increases or decreases in estimated revenues or costs, and such revisions are reflected in income in the period in</font><font style='font-family:Times New Roman;font-size:10pt;' > which the circumstances that gave rise to the revision become known by the company.</font></p><p style='text-align:left;margin-top:0pt;margin-bottom:0pt;' ><font style='font-family:Times New Roman;font-size:10pt;margin-left:0pt;' > </font></p><p style='text-align:left;margin-top:0pt;margin-bottom:0pt;' ><font style='font-family:Times New Roman;font-size:10pt;margin-left:16pt;' >The company performs ongoing profitability analyses of its services contracts accounted for under the POC method in order to determine whether the latest estimates of re</font><font style='font-family:Times New Roman;font-size:10pt;' >venues, costs and profits require updating. If at any time these estimates indicate that the contract will be unprofitable, the entire estimated loss for the remainder of the contract is recorded immediately. For non-POC method services contracts, any loss</font><font style='font-family:Times New Roman;font-size:10pt;' >es are recorded as incurred.</font></p><p style='text-align:left;margin-top:0pt;margin-bottom:0pt;' ><font style='font-family:Times New Roman;font-size:10pt;margin-left:0pt;' > </font></p><p style='text-align:left;margin-top:0pt;margin-bottom:0pt;' ><font style='font-family:Times New Roman;font-size:10pt;margin-left:16pt;' >In some services contracts, the company bills the client prior to recognizing revenue from performing the services. Deferred income of $</font><font style='font-family:Times New Roman;font-size:10pt;' >7,153 </font><font style='font-family:Times New Roman;font-size:10pt;' >million and $</font><font style='font-family:Times New Roman;font-size:10pt;' >7,281 </font><font style='font-family:Times New Roman;font-size:10pt;' >million at December 31, 2013 and 2012, respectively, is included</font><font style='font-family:Times New Roman;font-size:10pt;' > in the Consolidated Statement of Financial Position. In other services contracts, the company performs the services prior to billing the client. Unbilled accounts receivable of $</font><font style='font-family:Times New Roman;font-size:10pt;' >2,053 </font><font style='font-family:Times New Roman;font-size:10pt;' >million and $</font><font style='font-family:Times New Roman;font-size:10pt;' >1,998 </font><font style='font-family:Times New Roman;font-size:10pt;' >million at December 31, 2013 and 2012, respectively,</font><font style='font-family:Times New Roman;font-size:10pt;' > is included in notes and accounts receivable-trade in the Consolidated Statement of Financial Position.</font></p><p style='text-align:left;margin-top:0pt;margin-bottom:0pt;' ><font style='font-family:Times New Roman;font-size:10pt;margin-left:0pt;' > </font></p><p style='text-align:left;margin-top:0pt;margin-bottom:0pt;' ><font style='font-family:Times New Roman;font-size:10pt;margin-left:16pt;' >Billings usually occur in the month after the company performs the services or in accordance with specific contractual provisions. Unbilled receivabl</font><font style='font-family:Times New Roman;font-size:10pt;' >es are expected to be billed within four months.</font></p></div>
CY2013	us-gaap	Revenue Recognition Sales Of Goods RevenueRecognitionSalesOfGoods	<div><p style='text-align:left;margin-top:0pt;margin-bottom:0pt;' ><font style='font-family:Times New Roman;font-size:10pt;font-weight:bold;margin-left:0pt;' >Hardware</font></p><p style='text-align:left;margin-top:0pt;margin-bottom:0pt;' ><font style='font-family:Times New Roman;font-size:10pt;margin-left:0pt;' > </font></p><p style='text-align:left;margin-top:0pt;margin-bottom:0pt;' ><font style='font-family:Times New Roman;font-size:10pt;margin-left:0pt;' >The company’s hardware offerings include the sale or lease of system servers, storage solutions and the sale of semiconductors. The company also offers installation services for its more complex</font><font style='font-family:Times New Roman;font-size:10pt;' > hardware products.</font></p><p style='text-align:left;margin-top:0pt;margin-bottom:0pt;' ><font style='font-family:Times New Roman;font-size:10pt;margin-left:0pt;' > </font></p><p style='text-align:left;margin-top:0pt;margin-bottom:0pt;' ><font style='font-family:Times New Roman;font-size:10pt;margin-left:16pt;' >Revenue from hardware sales and sales-type leases is recognized when risk of loss has transferred to the client and there are no unfulfilled company obligations that affect the client’s final acceptance of the arrangement. Any cost of</font><font style='font-family:Times New Roman;font-size:10pt;' > standard warranties and remaining obligations that are inconsequential or perfunctory are accrued when the corresponding revenue is recognized. Revenue from rentals and operating leases is recognized on a straight-line basis over the term of the rental or</font><font style='font-family:Times New Roman;font-size:10pt;' > lease.</font></p></div>
CY2013	us-gaap	Revenue Recognition Software RevenueRecognitionSoftware	<div><p style='text-align:left;margin-top:0pt;margin-bottom:0pt;' ><font style='font-family:Times New Roman;font-size:10pt;font-weight:bold;margin-left:0pt;' >Software</font></p><p style='text-align:left;margin-top:0pt;margin-bottom:0pt;' ><font style='font-family:Times New Roman;font-size:10pt;margin-left:0pt;' > </font></p><p style='text-align:left;margin-top:0pt;margin-bottom:0pt;' ><font style='font-family:Times New Roman;font-size:10pt;margin-left:0pt;' >Revenue from perpetual (one-time charge) license software is recognized at the inception of the license term if all revenue recognition criteria have been met. Revenue from term (recurring license charge) license software </font><font style='font-family:Times New Roman;font-size:10pt;' >is recognized on a straight-line basis over the period that the client is entitled to use the license. Revenue from post-contract support, which may include unspecified upgrades on a when-and-if-available basis, is recognized on a straight-line basis over </font><font style='font-family:Times New Roman;font-size:10pt;' >the period such items are delivered. In multiple-deliverable arrangements that include software that is more than incidental to the products or services as a whole (software multiple-deliverable arrangements), software and software-related elements are acc</font><font style='font-family:Times New Roman;font-size:10pt;' >ounted for in accordance with software revenue recognition guidance. Software-related elements include software products and services for which a software deliverable is essential to its functionality. Tangible products containing software components and n</font><font style='font-family:Times New Roman;font-size:10pt;' >on-software components that function together to deliver the tangible product’s essential functionality are not within the scope of software revenue recognition guidance and are accounted for based on other applicable revenue recognition guidance.</font></p><p style='text-align:left;margin-top:0pt;margin-bottom:0pt;' ><font style='font-family:Times New Roman;font-size:10pt;margin-left:0pt;' > </font></p><p style='text-align:left;margin-top:0pt;margin-bottom:0pt;' ><font style='font-family:Times New Roman;font-size:10pt;margin-left:16pt;' >A soft</font><font style='font-family:Times New Roman;font-size:10pt;' >ware multiple-deliverable arrangement is separated into more than one unit of accounting if all of the following criteria are met:</font></p><p style='text-align:left;margin-top:0pt;margin-bottom:0pt;' ><font style='font-family:Times New Roman;font-size:10pt;margin-left:0pt;' > </font></p><p style='text-align:left;margin-top:0pt;margin-bottom:0pt;' ><font style='font-family:Symbol;font-size:10pt;margin-left:0pt;' ></font><font style='font-family:Times New Roman;font-size:3pt;' >                  </font><font style='font-family:Times New Roman;font-size:10pt;' >The functionality of the delivered element(s) is not dependent on the undelivered element(s);</font></p><p style='text-align:left;margin-top:0pt;margin-bottom:0pt;' ><font style='font-family:Symbol;font-size:10pt;margin-left:0pt;' ></font><font style='font-family:Times New Roman;font-size:3pt;' >         </font><font style='font-family:Times New Roman;font-size:3pt;' >         </font><font style='font-family:Times New Roman;font-size:10pt;' >There is vendor-specific objective evidence (VSOE) of fair value of the undelivered element(s). VSOE of fair value is based on the price charged when the deliverable is sold separately by the company on a regular basis and not as part of the multi</font><font style='font-family:Times New Roman;font-size:10pt;' >ple-deliverable arrangement; and</font></p><p style='text-align:left;margin-top:0pt;margin-bottom:0pt;' ><font style='font-family:Symbol;font-size:10pt;margin-left:0pt;' ></font><font style='font-family:Times New Roman;font-size:3pt;' >                  </font><font style='font-family:Times New Roman;font-size:10pt;' >Delivery of the delivered element(s) represents the culmination of the earnings process for that element(s).</font></p><p style='text-align:left;margin-top:0pt;margin-bottom:0pt;' ><font style='font-family:Times New Roman;font-size:10pt;margin-left:18pt;' > </font></p><p style='text-align:left;margin-top:0pt;margin-bottom:0pt;' ><font style='font-family:Times New Roman;font-size:10pt;margin-left:0pt;' >If any one of these criteria is not met, the arrangement is accounted for as one unit of acco</font><font style='font-family:Times New Roman;font-size:10pt;' >unting which would result in revenue being recognized ratably over the contract term or being deferred until the earlier of when such criteria are met or when the last undelivered element is delivered. If these criteria are met for each element and there i</font><font style='font-family:Times New Roman;font-size:10pt;' >s VSOE of fair value for all units of accounting in an arrangement, the arrangement consideration is allocated to the separate units of accounting based on each unit’s relative VSOE of fair value. There may be cases, however, in which there is VSOE of fair</font><font style='font-family:Times New Roman;font-size:10pt;' > value of the undelivered item(s) but no such evidence for the delivered item(s). In these cases, the residual method is used to allocate the arrangement consideration. Under the residual method, the amount of consideration allocated to the delivered item(</font><font style='font-family:Times New Roman;font-size:10pt;' >s) equals the total arrangement consideration less the aggregate VSOE of fair value of the undelivered elements.</font></p><p style='text-align:left;margin-top:0pt;margin-bottom:0pt;' ><font style='font-family:Times New Roman;font-size:10pt;margin-left:0pt;' > </font></p><p style='text-align:left;margin-top:0pt;margin-bottom:0pt;' ><font style='font-family:Times New Roman;font-size:10pt;margin-left:16pt;' >The company’s multiple-deliverable arrangements may have a stand-alone software deliverable that is subject to the existing software revenue </font><font style='font-family:Times New Roman;font-size:10pt;' >recognition guidance. The revenue for these multiple-deliverable arrangements is allocated to the software deliverable and the non-software deliverables based on the relative selling prices of all of the deliverables in the arrangement using the hierarchy:</font><font style='font-family:Times New Roman;font-size:10pt;' > VSOE, third-party evidence (TPE) or best estimate of selling price (BESP). In the limited circumstances where the company cannot determine VSOE or TPE of the selling price for all of the deliverables in the arrangement, including the software deliverable,</font><font style='font-family:Times New Roman;font-size:10pt;' > BESP is used for the purpose of performing this allocation.</font></p></div>
CY2011	us-gaap	Other Comprehensive Income Defined Benefit Plan Net Prior Service Cost Credit Arising During Period Before Tax OtherComprehensiveIncomeDefinedBenefitPlanNetPriorServiceCostCreditArisingDuringPeriodBeforeTax	28000000	USD
CY2011Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	20236000000	USD
CY2012	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	-3773000000	USD
CY2012	ibm	Common Stock Issued Under Employee Plan Value CommonStockIssuedUnderEmployeePlanValue	1532000000	USD
CY2012	ibm	Purchases Sales Treasury Stock Under Employee Plans Net PurchasesSalesTreasuryStockUnderEmployeePlansNet	-208000000	USD
CY2012	us-gaap	Stockholders Equity Other StockholdersEquityOther	-448000000	USD
CY2012	us-gaap	Minority Interest Period Increase Decrease MinorityInterestPeriodIncreaseDecrease	27000000	USD
CY2012Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	18984000000	USD
CY2013	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	-4058000000	USD
CY2013	us-gaap	Stockholders Equity Other StockholdersEquityOther	-268000000	USD
CY2013	us-gaap	Minority Interest Period Increase Decrease MinorityInterestPeriodIncreaseDecrease	13000000	USD
CY2013	us-gaap	Other Comprehensive Income Loss Foreign Currency Translation Adjustment Tax OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax	66000000	USD
CY2013	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	-2000000	USD
CY2013	ibm	Other Comprehensive Income Available For Sale Securities Subsequent Changes In Previously Impaired Securities Arising During Period Tax OtherComprehensiveIncomeAvailableForSaleSecuritiesSubsequentChangesInPreviouslyImpairedSecuritiesArisingDuringPeriodTax	-1000000	USD
CY2013	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax	-3000000	USD
CY2013	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax	15000000	USD
CY2013	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesTax	-47000000	USD
CY2013	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Benefit Plan Improvement Tax Effect OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansBenefitPlanImprovementTaxEffect	0	USD
CY2013	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax	1974000000	USD
CY2013	us-gaap	Other Comprehensive Income Finalization Of Pension And Non Pension Postretirement Plan Valuation Tax OtherComprehensiveIncomeFinalizationOfPensionAndNonPensionPostretirementPlanValuationTax	-1000000	USD
CY2013	us-gaap	Other Comprehensive Income Loss Amortization Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Prior Service Cost Credit Tax OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditTax	-40000000	USD
CY2013	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax	-1195000000	USD
CY2013	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	-3128000000	USD
CY2013	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	-1401000000	USD
CY2013	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-3000000	USD
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CY2013	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-5000000	USD
CY2013	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	28000000	USD
CY2013	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Net Of Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax	-76000000	USD
CY2013	us-gaap	Other Comprehensive Income Defined Benefit Plan Net Prior Service Costs Credit Arising During Period Net Of Tax OtherComprehensiveIncomeDefinedBenefitPlanNetPriorServiceCostsCreditArisingDuringPeriodNetOfTax	-16000000	USD
CY2013	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax	3395000000	USD
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CY2013	us-gaap	Other Comprehensive Income Loss Amortization Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Prior Service Cost Credit Net Of Tax OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax	-75000000	USD
CY2013	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax	-2304000000	USD
CY2013	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-5639000000	USD
CY2012	us-gaap	Other Comprehensive Income Loss Foreign Currency Translation Adjustment Tax OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax	-10000000	USD
CY2012	ibm	Other Comprehensive Income Available For Sale Securities Subsequent Changes In Previously Impaired Securities Arising During Period Tax OtherComprehensiveIncomeAvailableForSaleSecuritiesSubsequentChangesInPreviouslyImpairedSecuritiesArisingDuringPeriodTax	-8000000	USD
CY2012	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax	-5000000	USD
CY2012	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax	27000000	USD
CY2012	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesTax	-59000000	USD
CY2012	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax	-2327000000	USD
CY2012	us-gaap	Other Comprehensive Income Finalization Of Pension And Non Pension Postretirement Plan Valuation Tax OtherComprehensiveIncomeFinalizationOfPensionAndNonPensionPostretirementPlanValuationTax	0	USD
CY2012	us-gaap	Other Comprehensive Income Loss Amortization Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Prior Service Cost Credit Tax OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditTax	-59000000	USD
CY2012	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax	-874000000	USD
CY2012	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	1513000000	USD
CY2011	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	-162000000	USD
CY2011	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Net Of Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax	167000000	USD
CY2011	us-gaap	Other Comprehensive Income Defined Benefit Plan Net Prior Service Costs Credit Arising During Period Net Of Tax OtherComprehensiveIncomeDefinedBenefitPlanNetPriorServiceCostsCreditArisingDuringPeriodNetOfTax	22000000	USD
CY2011	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax	-3566000000	USD
CY2013	ibm	Available For Sale Debt Securities Maximum Maturities AvailableForSaleDebtSecuritiesMaximumMaturities	P1Y
CY2012	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	-34000000	USD
CY2012	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	4000000	USD
CY2012	ibm	Other Comprehensive Income Available For Sale Securities Subsequent Changes In Previously Impaired Securities Arising During Period Net OtherComprehensiveIncomeAvailableForSaleSecuritiesSubsequentChangesInPreviouslyImpairedSecuritiesArisingDuringPeriodNet	12000000	USD
CY2012	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-9000000	USD
CY2012	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	5000000	USD
CY2012	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Net Of Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax	-161000000	USD
CY2012	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax	-5162000000	USD
CY2012	us-gaap	Other Comprehensive Income Loss Finalization Of Pension And Non Pension Postretirement Plan Valuation Net Of Tax OtherComprehensiveIncomeLossFinalizationOfPensionAndNonPensionPostretirementPlanValuationNetOfTax	-2000000	USD
CY2012	us-gaap	Other Comprehensive Income Loss Amortization Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Prior Service Cost Credit Net Of Tax OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax	-89000000	USD
CY2012	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax	-1583000000	USD
CY2012	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	3669000000	USD
CY2011	us-gaap	Other Comprehensive Income Loss Foreign Currency Translation Adjustment Tax OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax	18000000	USD
CY2011	ibm	Other Comprehensive Income Available For Sale Securities Subsequent Changes In Previously Impaired Securities Arising During Period Tax OtherComprehensiveIncomeAvailableForSaleSecuritiesSubsequentChangesInPreviouslyImpairedSecuritiesArisingDuringPeriodTax	-1000000	USD
CY2011	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax	-91000000	USD
CY2011	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax	-105000000	USD
CY2011	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesTax	77000000	USD
CY2011	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Benefit Plan Improvement Tax Effect OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansBenefitPlanImprovementTaxEffect	7000000	USD
CY2011	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax	-1897000000	USD
CY2011	us-gaap	Other Comprehensive Income Finalization Of Pension And Non Pension Postretirement Plan Valuation Tax OtherComprehensiveIncomeFinalizationOfPensionAndNonPensionPostretirementPlanValuationTax	3000000	USD
CY2011	us-gaap	Other Comprehensive Income Loss Amortization Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Prior Service Cost Credit Tax OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditTax	-62000000	USD
CY2011	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax	-619000000	USD
CY2011	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	1343000000	USD
CY2011	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	-711000000	USD
CY2011	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-9000000	USD
CY2011	ibm	Other Comprehensive Income Available For Sale Securities Subsequent Changes In Previously Impaired Securities Arising During Period Net OtherComprehensiveIncomeAvailableForSaleSecuritiesSubsequentChangesInPreviouslyImpairedSecuritiesArisingDuringPeriodNet	3000000	USD
CY2011	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-150000000	USD
CY2011	us-gaap	Other Comprehensive Income Loss Finalization Of Pension And Non Pension Postretirement Plan Valuation Net Of Tax OtherComprehensiveIncomeLossFinalizationOfPensionAndNonPensionPostretirementPlanValuationNetOfTax	7000000	USD
CY2011	us-gaap	Other Comprehensive Income Loss Amortization Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Prior Service Cost Credit Net Of Tax OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax	-94000000	USD
CY2011	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax	-1227000000	USD
CY2011	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	2448000000	USD
CY2010Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-18743000000	USD
CY2011	us-gaap	Other Comprehensive Income Loss Before Reclassifications Net Of Tax OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax	-4461000000	USD
CY2011	us-gaap	Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax	-1319000000	USD
CY2011Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-21885000000	USD
CY2012	us-gaap	Other Comprehensive Income Loss Before Reclassifications Net Of Tax OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax	-5177000000	USD
CY2012	us-gaap	Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax	-1303000000	USD
CY2013	us-gaap	Other Comprehensive Income Loss Before Reclassifications Net Of Tax OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax	2036000000	USD
CY2013	us-gaap	Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax	-2121000000	USD
CY2011	us-gaap	Available For Sale Securities Gross Realized Gains Losses Sale Proceeds AvailableForSaleSecuritiesGrossRealizedGainsLossesSaleProceeds	405000000	USD
CY2011	us-gaap	Available For Sale Securities Gross Realized Gains AvailableForSaleSecuritiesGrossRealizedGains	232000000	USD
CY2012	us-gaap	Available For Sale Securities Gross Realized Gains Losses Sale Proceeds AvailableForSaleSecuritiesGrossRealizedGainsLossesSaleProceeds	112000000	USD
CY2012	us-gaap	Available For Sale Securities Gross Realized Gains AvailableForSaleSecuritiesGrossRealizedGains	45000000	USD
CY2012	us-gaap	Available For Sale Securities Gross Realized Losses AvailableForSaleSecuritiesGrossRealizedLosses	1000000	USD
CY2013	us-gaap	Available For Sale Securities Gross Realized Gains Losses Sale Proceeds AvailableForSaleSecuritiesGrossRealizedGainsLossesSaleProceeds	41000000	USD
CY2013	us-gaap	Available For Sale Securities Gross Realized Gains AvailableForSaleSecuritiesGrossRealizedGains	13000000	USD
CY2013	us-gaap	Available For Sale Securities Gross Realized Losses AvailableForSaleSecuritiesGrossRealizedLosses	5000000	USD
CY2012	ibm	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax And Subsequent Changes OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTaxAndSubsequentChanges	17000000	USD
CY2013Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	32856000000	USD
CY2012Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	24088000000	USD
CY2012Q4	ibm	Deferred Services Transition And Setup Costs Noncurrent DeferredServicesTransitionAndSetupCostsNoncurrent	1630000000	USD
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CY2012Q4	us-gaap	Equity Method Investments EquityMethodInvestments	120000000	USD
CY2012Q4	ibm	Non Equity Method Investment NonEquityMethodInvestment	226000000	USD
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CY2013Q4	us-gaap	Equity Method Investments EquityMethodInvestments	110000000	USD
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CY2013Q4	us-gaap	Other Assets Miscellaneous Noncurrent OtherAssetsMiscellaneousNoncurrent	738000000	USD
CY2012Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	6679000000	USD
CY2012Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	2892000000	USD
CY2013	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	2246000000	USD
CY2013	us-gaap	Goodwill Purchase Accounting Adjustments GoodwillPurchaseAccountingAdjustments	61000000	USD
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CY2013	us-gaap	Goodwill Translation And Purchase Accounting Adjustments GoodwillTranslationAndPurchaseAccountingAdjustments	-363000000	USD
CY2013	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	USD
CY2012Q4	us-gaap	Commercial Paper CommercialPaper	1800000000	USD
CY2012Q4	us-gaap	Short Term Bank Loans And Notes Payable ShortTermBankLoansAndNotesPayable	1789000000	USD
CY2012Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	5593000000	USD
CY2013Q4	us-gaap	Commercial Paper CommercialPaper	2458000000	USD
CY2013Q4	us-gaap	Short Term Bank Loans And Notes Payable ShortTermBankLoansAndNotesPayable	551000000	USD
CY2012Q4	us-gaap	Debt Instrument Unamortized Discount DebtInstrumentUnamortizedDiscount	865000000	USD
CY2012Q4	us-gaap	Deferred Gain Loss On Discontinuation Of Interest Rate Fair Value Hedge DeferredGainLossOnDiscontinuationOfInterestRateFairValueHedge	-886000000	USD
CY2012Q4	us-gaap	Long Term Debt LongTermDebt	29680000000	USD
CY2013Q4	us-gaap	Debt Instrument Unamortized Discount DebtInstrumentUnamortizedDiscount	872000000	USD
CY2013Q4	us-gaap	Deferred Gain Loss On Discontinuation Of Interest Rate Fair Value Hedge DeferredGainLossOnDiscontinuationOfInterestRateFairValueHedge	-546000000	USD
CY2013Q4	us-gaap	Long Term Debt LongTermDebt	36710000000	USD
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CY2013Q4	us-gaap	Liability For Uncertain Tax Positions Noncurrent LiabilityForUncertainTaxPositionsNoncurrent	3189000000	USD
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CY2013Q4	ibm	Defined Contribution Pension Plan Liabilities Noncurrent DefinedContributionPensionPlanLiabilitiesNoncurrent	1673000000	USD
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CY2013Q4	us-gaap	Supplemental Unemployment Benefits Disability Related Benefits SupplementalUnemploymentBenefitsDisabilityRelatedBenefits	699000000	USD
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CY2013Q4	us-gaap	Product Warranty Accrual Noncurrent ProductWarrantyAccrualNoncurrent	171000000	USD
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CY2013Q4	us-gaap	Asset Retirement Obligations Noncurrent AssetRetirementObligationsNoncurrent	129000000	USD
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CY2013Q4	us-gaap	Other Sundry Liabilities Noncurrent OtherSundryLiabilitiesNoncurrent	644000000	USD
CY2012Q4	us-gaap	Other Sundry Liabilities Noncurrent OtherSundryLiabilitiesNoncurrent	691000000	USD
CY2013Q4	ibm	Deferred Services Transition And Setup Costs DeferredServicesTransitionAndSetupCosts	2402000000	USD
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CY2013	us-gaap	Marketing And Advertising Expense MarketingAndAdvertisingExpense	1294000000	USD
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CY2013	ibm	Minimum Percentage Of Tax Positions Expected To Be Realized Upon Settlement MinimumPercentageOfTaxPositionsExpectedToBeRealizedUponSettlement	0.5	pure
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CY2013Q4	us-gaap	Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Number Of Exercisable Options ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions	5622951	shares
CY2013Q4	us-gaap	Sharebased Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Outstanding Options Weighted Average Exercise Price Beginning Balance1 SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1	97
CY2013Q4	us-gaap	Sharebased Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Exercisable Options Weighted Average Exercise Price1 SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1	97
CY2012Q4	us-gaap	Sharebased Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Exercisable Options Weighted Average Exercise Price1 SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1	94
CY2011Q4	us-gaap	Sharebased Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Exercisable Options Weighted Average Exercise Price1 SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1	90
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CY2013	us-gaap	Sharebased Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Outstanding Options Weighted Average Remaining Contractual Term2 SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageRemainingContractualTerm2	P1Y1M
CY2013Q4	us-gaap	Derivative Net Liability Position Aggregate Fair Value DerivativeNetLiabilityPositionAggregateFairValue	216000000	USD
CY2013Q4	ibm	Derivative Net Asset Position Aggregate Fair Value DerivativeNetAssetPositionAggregateFairValue	719000000	USD
CY2012Q4	ibm	Derivative Net Asset Position Aggregate Fair Value DerivativeNetAssetPositionAggregateFairValue	918000000	USD
CY2013Q4	us-gaap	Collateral Already Posted Aggregate Fair Value CollateralAlreadyPostedAggregateFairValue	0	USD
CY2012Q4	us-gaap	Collateral Already Posted Aggregate Fair Value CollateralAlreadyPostedAggregateFairValue	0	USD
CY2013	ibm	Derivative Collateral Cash Received DerivativeCollateralCashReceived	29000000	USD
CY2013Q4	us-gaap	Derivative Collateral Obligation To Return Cash DerivativeCollateralObligationToReturnCash	29000000	USD
CY2013Q4	ibm	Cash Collateral Rehypothecated CashCollateralRehypothecated	0	USD
CY2012Q4	ibm	Cash Collateral Rehypothecated CashCollateralRehypothecated	0	USD
CY2012	us-gaap	Derivative Gain Loss On Derivative Net DerivativeGainLossOnDerivativeNet	-81000000	USD
CY2011	us-gaap	Derivative Gain Loss On Derivative Net DerivativeGainLossOnDerivativeNet	880000000	USD
CY2012	us-gaap	Change In Unrealized Gain Loss On Hedged Item In Fair Value Hedge1 ChangeInUnrealizedGainLossOnHedgedItemInFairValueHedge1	108000000	USD
CY2011	us-gaap	Change In Unrealized Gain Loss On Hedged Item In Fair Value Hedge1 ChangeInUnrealizedGainLossOnHedgedItemInFairValueHedge1	-206000000	USD
CY2013Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	1054390937	shares
CY2013Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	150000000	shares
CY2013Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.01
CY2013Q4	ibm	Treasury Stocks Acquired Repurchase Authorization TreasuryStocksAcquiredRepurchaseAuthorization	14659000000	USD
CY2012	us-gaap	Derivative Instruments Gain Loss Recognized In Other Comprehensive Income Effective Portion Net DerivativeInstrumentsGainLossRecognizedInOtherComprehensiveIncomeEffectivePortionNet	6000000	USD
CY2012	us-gaap	Derivative Instruments Gain Loss Reclassified From Accumulated Oci Into Income Effective Portion Net DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet	253000000	USD
CY2012	us-gaap	Derivative Instruments Gain Loss Recognized In Income Ineffective Portion And Amount Excluded From Effectiveness Testing Net DerivativeInstrumentsGainLossRecognizedInIncomeIneffectivePortionAndAmountExcludedFromEffectivenessTestingNet	14000000	USD
CY2011	us-gaap	Derivative Instruments Gain Loss Recognized In Other Comprehensive Income Effective Portion Net DerivativeInstrumentsGainLossRecognizedInOtherComprehensiveIncomeEffectivePortionNet	-221000000	USD
CY2011	us-gaap	Derivative Instruments Gain Loss Reclassified From Accumulated Oci Into Income Effective Portion Net DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet	-511000000	USD
CY2011	us-gaap	Derivative Instruments Gain Loss Recognized In Income Ineffective Portion And Amount Excluded From Effectiveness Testing Net DerivativeInstrumentsGainLossRecognizedInIncomeIneffectivePortionAndAmountExcludedFromEffectivenessTestingNet	-12000000	USD
CY2013Q4	us-gaap	Defined Benefit Plan Expected Future Benefit Payments Year Five DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive	6087000000	USD
CY2013Q4	us-gaap	Defined Benefit Plan Expected Future Benefit Payments Five Fiscal Years Thereafter DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter	31706000000	USD
CY2012	us-gaap	Net Cash Provided By Used In Operating Activities Continuing Operations NetCashProvidedByUsedInOperatingActivitiesContinuingOperations	19586000000	USD
CY2011	us-gaap	Net Cash Provided By Used In Operating Activities Continuing Operations NetCashProvidedByUsedInOperatingActivitiesContinuingOperations	19846000000	USD
CY2012	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	12008000000	USD
CY2013	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	13993000000	USD
CY2013	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	33000000	USD
CY2013	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	-84000000	USD
CY2013	ibm	Financing Receivable Allowance For Credit Losses Other FinancingReceivableAllowanceForCreditLossesOther	5000000	USD
CY2012Q4	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	160000000	USD
CY2012Q4	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	143000000	USD
CY2012	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	156000000	USD
CY2012	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	0	USD
CY2012	us-gaap	Impaired Financing Receivable Interest Income Cash Basis Method ImpairedFinancingReceivableInterestIncomeCashBasisMethod	0	USD
CY2012	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	25000000	USD
CY2012Q4	us-gaap	Loans And Leases Receivable Collateral For Secured Borrowings LoansAndLeasesReceivableCollateralForSecuredBorrowings	650000000	USD
CY2013Q4	us-gaap	Loans And Leases Receivable Collateral For Secured Borrowings LoansAndLeasesReceivableCollateralForSecuredBorrowings	769000000	USD
CY2013Q4	us-gaap	Defined Benefit Plan Expected Future Benefit Payments Next Twelve Months DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths	5910000000	USD
CY2013Q4	us-gaap	Defined Benefit Plan Expected Future Benefit Payments Year Two DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo	5945000000	USD
CY2013Q4	us-gaap	Defined Benefit Plan Expected Future Benefit Payments Year Three DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree	6022000000	USD
CY2013Q4	us-gaap	Defined Benefit Plan Expected Future Benefit Payments Year Four DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour	6073000000	USD
CY2011	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	1513000000	USD
CY2011	us-gaap	Pension And Other Postretirement Benefit Expense PensionAndOtherPostretirementBenefitExpense	1832000000	USD
CY2013	us-gaap	Pension And Other Postretirement Benefit Expense PensionAndOtherPostretirementBenefitExpense	2876000000	USD
CY2012	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	1506000000	USD
CY2012	us-gaap	Pension And Other Postretirement Benefit Expense PensionAndOtherPostretirementBenefitExpense	2389000000	USD
CY2013	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	1384000000	USD
CY2013Q4	ibm	Defined Benefit Plan Plans With Plan Assets In Excess Of Benefit Obligation Funded Status DefinedBenefitPlanPlansWithPlanAssetsInExcessOfBenefitObligationFundedStatus	5544000000	USD
CY2013Q4	ibm	Defined Benefit Plan Plans With Benefit Obligations In Excess Of Plan Assets Funded Status DefinedBenefitPlanPlansWithBenefitObligationsInExcessOfPlanAssetsFundedStatus	16977000000	USD
CY2012Q4	ibm	Defined Benefit Plan Plans With Plan Assets In Excess Of Benefit Obligation Funded Status DefinedBenefitPlanPlansWithPlanAssetsInExcessOfBenefitObligationFundedStatus	945000000	USD
CY2012Q4	ibm	Defined Benefit Plan Plans With Benefit Obligations In Excess Of Plan Assets Funded Status DefinedBenefitPlanPlansWithBenefitObligationsInExcessOfPlanAssetsFundedStatus	21134000000	USD
CY2013	us-gaap	Net Cash Provided By Used In Operating Activities Continuing Operations NetCashProvidedByUsedInOperatingActivitiesContinuingOperations	17485000000	USD
CY2013	ibm	Common Stock Issued Under Employee Plan Shares CommonStockIssuedUnderEmployeePlanShares	9961389	shares
CY2012	ibm	Common Stock Issued Under Employee Plan Shares CommonStockIssuedUnderEmployeePlanShares	15091320	shares
CY2011	ibm	Common Stock Issued Under Employee Plan Shares CommonStockIssuedUnderEmployeePlanShares	20669785	shares
CY2013	ibm	Purchases Treasury Stock Under Employee Plans Shares PurchasesTreasuryStockUnderEmployeePlansShares	1666069	shares
CY2012	ibm	Purchases Treasury Stock Under Employee Plans Shares PurchasesTreasuryStockUnderEmployeePlansShares	2406007	shares
CY2011	ibm	Purchases Treasury Stock Under Employee Plans Shares PurchasesTreasuryStockUnderEmployeePlansShares	1717246	shares
CY2013	ibm	Sales Treasury Stock Under Employee Plans Shares SalesTreasuryStockUnderEmployeePlansShares	1849883	shares
CY2012	ibm	Sales Treasury Stock Under Employee Plans Shares SalesTreasuryStockUnderEmployeePlansShares	2746169	shares
CY2011	ibm	Sales Treasury Stock Under Employee Plans Shares SalesTreasuryStockUnderEmployeePlansShares	4920198	shares
CY2013	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	73121942	shares
CY2012	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	61246371	shares
CY2011	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	88683716	shares
CY2013	ibm	Unrecognized Tax Benefits Offsets UnrecognizedTaxBenefitsOffsets	556000000	USD
CY2012	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Expense UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense	134000000	USD
CY2012Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	533000000	USD
CY2013Q4	us-gaap	Significant Change In Unrecognized Tax Benefits Is Reasonably Possible Amount Of Unrecorded Benefit SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleAmountOfUnrecordedBenefit	101000000	USD
CY2012	ibm	Deferred Payments In Excess Of Fair Value Of Acquired Assets DeferredPaymentsInExcessOfFairValueOfAcquiredAssets	51000000	USD
CY2013Q2	dei	Entity Public Float EntityPublicFloat	209300000000	USD
CY2014Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	1041340758	shares
CY2012Q4	us-gaap	Derivative Collateral Obligation To Return Cash DerivativeCollateralObligationToReturnCash	69000000	USD
CY2011Q4	us-gaap	Goodwill Goodwill	26213000000	USD
CY2011Q4	us-gaap	Standard Product Warranty Accrual StandardProductWarrantyAccrual	407000000	USD
CY2012	us-gaap	Standard Product Warranty Accrual Warranties Issued StandardProductWarrantyAccrualWarrantiesIssued	394000000	USD
CY2012	us-gaap	Standard Product Warranty Accrual Preexisting Increase Decrease StandardProductWarrantyAccrualPreexistingIncreaseDecrease	-15000000	USD
CY2012	us-gaap	Standard Product Warranty Accrual Payments StandardProductWarrantyAccrualPayments	392000000	USD
CY2012Q4	us-gaap	Standard Product Warranty Accrual StandardProductWarrantyAccrual	394000000	USD
CY2013	us-gaap	Standard Product Warranty Accrual Warranties Issued StandardProductWarrantyAccrualWarrantiesIssued	346000000	USD
CY2013	us-gaap	Standard Product Warranty Accrual Preexisting Increase Decrease StandardProductWarrantyAccrualPreexistingIncreaseDecrease	22000000	USD
CY2013	us-gaap	Standard Product Warranty Accrual Payments StandardProductWarrantyAccrualPayments	387000000	USD
CY2013Q4	us-gaap	Standard Product Warranty Accrual StandardProductWarrantyAccrual	376000000	USD
CY2011Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	5575000000	USD
CY2012Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	5672000000	USD
CY2012	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	94000000	USD
CY2011Q4	us-gaap	Assets Assets	116433000000	USD
CY2013Q4	us-gaap	Derivative Fair Value Of Derivative Liability Amount Not Offset Against Collateral DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral	251000000	USD
CY2012	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Writedown Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForWritedownOfSecuritiesNetOfTax	2000000	USD
CY2013Q4	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	37036000000	USD
CY2012Q4	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	29660000000	USD
CY2013	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition1 EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1	P3Y
CY2013	ibm	Derivative Credit Risk Related Contingent Features Triggering Circumstances Basis Point Spread DerivativeCreditRiskRelatedContingentFeaturesTriggeringCircumstancesBasisPointSpread	0.025	pure
CY2013Q4	us-gaap	Derivative Collateral Right To Reclaim Cash DerivativeCollateralRightToReclaimCash	0	USD
CY2012Q4	us-gaap	Derivative Collateral Right To Reclaim Cash DerivativeCollateralRightToReclaimCash	0	USD
CY2013	us-gaap	Impairment Of Intangible Assets Excluding Goodwill ImpairmentOfIntangibleAssetsExcludingGoodwill	0	USD
CY2012	us-gaap	Impairment Of Intangible Assets Excluding Goodwill ImpairmentOfIntangibleAssetsExcludingGoodwill	0	USD
CY2013	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	5
CY2012Q4	us-gaap	Restructuring Reserve Current RestructuringReserveCurrent	30000000	USD
CY2013	us-gaap	Payments For Restructuring PaymentsForRestructuring	30000000	USD
CY2013	ibm	Restructuring Reserve Translation And Other Adjustment Current RestructuringReserveTranslationAndOtherAdjustmentCurrent	28000000	USD
CY2013Q4	us-gaap	Restructuring Reserve Current RestructuringReserveCurrent	27000000	USD
CY2013	ibm	Restructuring Reserve Translation And Other Adjustment Noncurrent RestructuringReserveTranslationAndOtherAdjustmentNoncurrent	10000000	USD
CY2013	ibm	Common Stock Issued Under Employee Plan Stock Option Exercises Acquired And Non Us Employees CommonStockIssuedUnderEmployeePlanStockOptionExercisesAcquiredAndNonUSEmployees	1849883	shares
CY2011	ibm	Common Stock Issued Under Employee Plan Stock Option Exercises Acquired And Non Us Employees CommonStockIssuedUnderEmployeePlanStockOptionExercisesAcquiredAndNonUSEmployees	4920198	shares
CY2012	ibm	Common Stock Issued Under Employee Plan Stock Option Exercises Acquired And Non Us Employees CommonStockIssuedUnderEmployeePlanStockOptionExercisesAcquiredAndNonUSEmployees	2746169	shares
CY2013Q4	ibm	Share Based Compensation Arrangement By Share Based Payment Award Additional Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardAdditionalOptionsOutstandingWeightedAverageExercisePrice	67
CY2013Q4	ibm	Share Based Compensation Arrangement By Share Based Payment Award Additional Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardAdditionalOptionsOutstandingNumber	600000	shares
CY2013Q4	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	995000000	USD
CY2012Q4	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	1101000000	USD
CY2013	us-gaap	Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount	0	USD
CY2012	us-gaap	Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount	0	USD
CY2011	us-gaap	Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount	0	USD
CY2013Q4	ibm	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Additional Authorization ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAdditionalAuthorization	66200000	shares
CY2013Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Available For Grant ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant	118600000	shares
CY2013Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Authorized ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized	274100000	shares
CY2013	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	1094486604	shares
CY2013	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	6751240	shares
CY2013	us-gaap	Incremental Common Shares Attributable To Contingently Issuable Shares IncrementalCommonSharesAttributableToContingentlyIssuableShares	1804313	shares
CY2013	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	1103042156	shares
CY2013	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	16483000000	USD
CY2013	us-gaap	Dilutive Securities DilutiveSecurities	1000000	USD
CY2013	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	16483000000	USD
CY2013	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	14.94
CY2013	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	15.06
CY2013	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	8797	shares
CY2012Q4	us-gaap	Derivative Net Liability Position Aggregate Fair Value DerivativeNetLiabilityPositionAggregateFairValue	94000000	USD
CY2012Q4	us-gaap	Derivative Fair Value Of Derivative Liability Amount Not Offset Against Collateral DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral	262000000	USD
CY2013Q4	us-gaap	Derivative Collateral Obligation To Return Securities DerivativeCollateralObligationToReturnSecurities	0	USD
CY2012Q4	us-gaap	Derivative Collateral Obligation To Return Securities DerivativeCollateralObligationToReturnSecurities	31000000	USD
CY2011	us-gaap	Payments To Acquire Software PaymentsToAcquireSoftware	559000000	USD
CY2013	us-gaap	Payments To Acquire Investments PaymentsToAcquireInvestments	4608000000	USD
CY2012	us-gaap	Payments To Acquire Investments PaymentsToAcquireInvestments	4109000000	USD
CY2013Q4	us-gaap	Derivative Assets DerivativeAssets	439000000	USD
CY2012Q4	us-gaap	Derivative Assets DerivativeAssets	587000000	USD
CY2013Q4	us-gaap	Derivative Liabilities DerivativeLiabilities	250000000	USD
CY2012Q4	us-gaap	Derivative Liabilities DerivativeLiabilities	242000000	USD
CY2012	ibm	Derivative Collateral Cash Received DerivativeCollateralCashReceived	69000000	USD
CY2013	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	4024000000	USD
CY2013	us-gaap	Interest Paid Net InterestPaidNet	982000000	USD
CY2013	us-gaap	Capital Lease Obligations Incurred CapitalLeaseObligationsIncurred	14000000	USD
CY2012	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	3169000000	USD
CY2011	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	4168000000	USD
CY2012	us-gaap	Interest Paid Net InterestPaidNet	1009000000	USD
CY2011	us-gaap	Interest Paid Net InterestPaidNet	956000000	USD
CY2012	us-gaap	Capital Lease Obligations Incurred CapitalLeaseObligationsIncurred	10000000	USD
CY2011	us-gaap	Capital Lease Obligations Incurred CapitalLeaseObligationsIncurred	39000000	USD
CY2013	us-gaap	Proceeds From Issuance Of Long Term Debt And Capital Securities Net ProceedsFromIssuanceOfLongTermDebtAndCapitalSecuritiesNet	16353000000	USD
CY2013	us-gaap	Repayments Of Long Term Debt And Capital Securities RepaymentsOfLongTermDebtAndCapitalSecurities	10013000000	USD
CY2013	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	621000000	USD
CY2013	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	13859000000	USD
CY2013	us-gaap	Proceeds From Issuance Or Sale Of Equity ProceedsFromIssuanceOrSaleOfEquity	1074000000	USD
CY2013	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	4058000000	USD
CY2013	us-gaap	Net Cash Provided By Used In Financing Activities Continuing Operations NetCashProvidedByUsedInFinancingActivitiesContinuingOperations	-9883000000	USD
CY2013	us-gaap	Effect Of Exchange Rate On Cash And Cash Equivalents Continuing Operations EffectOfExchangeRateOnCashAndCashEquivalentsContinuingOperations	28000000	USD
CY2013	us-gaap	Net Cash Provided By Used In Continuing Operations NetCashProvidedByUsedInContinuingOperations	304000000	USD
CY2012	us-gaap	Net Cash Provided By Used In Continuing Operations NetCashProvidedByUsedInContinuingOperations	-1511000000	USD
CY2012	us-gaap	Effect Of Exchange Rate On Cash And Cash Equivalents Continuing Operations EffectOfExchangeRateOnCashAndCashEquivalentsContinuingOperations	-116000000	USD
CY2011	us-gaap	Effect Of Exchange Rate On Cash And Cash Equivalents Continuing Operations EffectOfExchangeRateOnCashAndCashEquivalentsContinuingOperations	-493000000	USD
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CY2012	us-gaap	Proceeds From Issuance Of Long Term Debt And Capital Securities Net ProceedsFromIssuanceOfLongTermDebtAndCapitalSecuritiesNet	12242000000	USD
CY2011	us-gaap	Proceeds From Issuance Of Long Term Debt And Capital Securities Net ProceedsFromIssuanceOfLongTermDebtAndCapitalSecuritiesNet	9996000000	USD
CY2012	us-gaap	Repayments Of Long Term Debt And Capital Securities RepaymentsOfLongTermDebtAndCapitalSecurities	9549000000	USD
CY2011	us-gaap	Repayments Of Long Term Debt And Capital Securities RepaymentsOfLongTermDebtAndCapitalSecurities	8947000000	USD
CY2012	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	-441000000	USD
CY2011	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	1321000000	USD
CY2012	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	11995000000	USD
CY2011	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	15046000000	USD
CY2012	us-gaap	Proceeds From Issuance Or Sale Of Equity ProceedsFromIssuanceOrSaleOfEquity	1540000000	USD
CY2011	us-gaap	Proceeds From Issuance Or Sale Of Equity ProceedsFromIssuanceOrSaleOfEquity	2453000000	USD
CY2012	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	3773000000	USD
CY2011	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	3473000000	USD
CY2012	us-gaap	Net Cash Provided By Used In Financing Activities Continuing Operations NetCashProvidedByUsedInFinancingActivitiesContinuingOperations	-11976000000	USD
CY2011	us-gaap	Net Cash Provided By Used In Financing Activities Continuing Operations NetCashProvidedByUsedInFinancingActivitiesContinuingOperations	-13696000000	USD
CY2013	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	3623000000	USD
CY2012	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	4082000000	USD
CY2011	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	4108000000	USD
CY2013	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	372000000	USD
CY2012	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	410000000	USD
CY2011	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	608000000	USD
CY2013	us-gaap	Payments To Acquire Software PaymentsToAcquireSoftware	517000000	USD
CY2012	us-gaap	Payments To Acquire Software PaymentsToAcquireSoftware	635000000	USD
CY2011	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	28000000	USD
CY2013	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-529000000	USD
CY2012	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	16604000000	USD
CY2011	us-gaap	Payments To Acquire Investments PaymentsToAcquireInvestments	1594000000	USD
CY2013	us-gaap	Proceeds From Sale Maturity And Collections Of Investments ProceedsFromSaleMaturityAndCollectionsOfInvestments	4873000000	USD
CY2012	us-gaap	Proceeds From Sale Maturity And Collections Of Investments ProceedsFromSaleMaturityAndCollectionsOfInvestments	3142000000	USD
CY2011	us-gaap	Proceeds From Sale Maturity And Collections Of Investments ProceedsFromSaleMaturityAndCollectionsOfInvestments	3345000000	USD
CY2013	ibm	Non Operating Finance Receivables Net NonOperatingFinanceReceivablesNet	-1063000000	USD
CY2012	ibm	Non Operating Finance Receivables Net NonOperatingFinanceReceivablesNet	-608000000	USD
CY2011	ibm	Non Operating Finance Receivables Net NonOperatingFinanceReceivablesNet	-291000000	USD
CY2013	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	3056000000	USD
CY2012	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	3722000000	USD
CY2011	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	1811000000	USD
CY2013	us-gaap	Proceeds From Divestiture Of Businesses Net Of Cash Divested ProceedsFromDivestitureOfBusinessesNetOfCashDivested	297000000	USD
CY2012	us-gaap	Proceeds From Divestiture Of Businesses Net Of Cash Divested ProceedsFromDivestitureOfBusinessesNetOfCashDivested	599000000	USD
CY2011	us-gaap	Proceeds From Divestiture Of Businesses Net Of Cash Divested ProceedsFromDivestitureOfBusinessesNetOfCashDivested	14000000	USD
CY2013	us-gaap	Net Cash Provided By Used In Investing Activities Continuing Operations NetCashProvidedByUsedInInvestingActivitiesContinuingOperations	-7326000000	USD
CY2012	us-gaap	Net Cash Provided By Used In Investing Activities Continuing Operations NetCashProvidedByUsedInInvestingActivitiesContinuingOperations	-9004000000	USD
CY2011	us-gaap	Net Cash Provided By Used In Investing Activities Continuing Operations NetCashProvidedByUsedInInvestingActivitiesContinuingOperations	-4396000000	USD
CY2013	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	1407000000	USD
CY2012	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	2230000000	USD
CY2011	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	1279000000	USD
CY2013	ibm	Increase Decrease In Retirement Related Assets And Liabilities IncreaseDecreaseInRetirementRelatedAssetsAndLiabilities	-294000000	USD
CY2012	ibm	Increase Decrease In Retirement Related Assets And Liabilities IncreaseDecreaseInRetirementRelatedAssetsAndLiabilities	1008000000	USD
CY2011	ibm	Increase Decrease In Retirement Related Assets And Liabilities IncreaseDecreaseInRetirementRelatedAssetsAndLiabilities	1371000000	USD
CY2013	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	57000000	USD
CY2012	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-280000000	USD
CY2011	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	163000000	USD
CY2013	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	747000000	USD
CY2012	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	-733000000	USD
CY2012	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-224000000	USD
CY2011	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	451000000	USD
CY2013	us-gaap	Depreciation Depreciation	3327000000	USD
CY2012	us-gaap	Depreciation Depreciation	3392000000	USD
CY2011	us-gaap	Depreciation Depreciation	3589000000	USD
CY2013	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	1351000000	USD
CY2012	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	1284000000	USD
CY2011	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	1226000000	USD
CY2013	us-gaap	Share Based Compensation ShareBasedCompensation	614000000	USD
CY2012	us-gaap	Share Based Compensation ShareBasedCompensation	688000000	USD
CY2011	us-gaap	Share Based Compensation ShareBasedCompensation	697000000	USD
CY2013	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-1610000000	USD
CY2012	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	797000000	USD
CY2011	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	1212000000	USD
CY2013	us-gaap	Gain Loss On Sale Of Other Assets GainLossOnSaleOfOtherAssets	236000000	USD
CY2012	us-gaap	Gain Loss On Sale Of Other Assets GainLossOnSaleOfOtherAssets	729000000	USD
CY2011	us-gaap	Gain Loss On Sale Of Other Assets GainLossOnSaleOfOtherAssets	342000000	USD
CY2013Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	3854000000	USD
CY2012	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	14.37
CY2011	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	13.06
CY2012	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	14.53
CY2011	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	13.25
CY2011	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	15855000000	USD
CY2012	us-gaap	Dilutive Securities DilutiveSecurities	1000000	USD
CY2011	us-gaap	Dilutive Securities DilutiveSecurities	0	USD
CY2012	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	16603000000	USD
CY2011	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	15855000000	USD
CY2012	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	1142508521	shares
CY2011	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	1196951006	shares
CY2012	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	10868426	shares
CY2011	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	14241131	shares
CY2012	us-gaap	Incremental Common Shares Attributable To Contingently Issuable Shares IncrementalCommonSharesAttributableToContingentlyIssuableShares	2072370	shares
CY2011	us-gaap	Incremental Common Shares Attributable To Contingently Issuable Shares IncrementalCommonSharesAttributableToContingentlyIssuableShares	2575848	shares
CY2012	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	1155449317	shares
CY2011	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	1213767985	shares
CY2011	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	0	shares
CY2012	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	0	shares
CY2012	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	11000000	USD
CY2013	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	7000000	USD
CY2011	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	6000000	USD
CY2012	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	688000000	USD
CY2011	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	697000000	USD
CY2012	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	240000000	USD
CY2011	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	246000000	USD
CY2012	us-gaap	Allocated Share Based Compensation Expense Net Of Tax AllocatedShareBasedCompensationExpenseNetOfTax	448000000	USD
CY2011	us-gaap	Allocated Share Based Compensation Expense Net Of Tax AllocatedShareBasedCompensationExpenseNetOfTax	450000000	USD
CY2011	us-gaap	Available For Sale Securities Gross Realized Losses AvailableForSaleSecuritiesGrossRealizedLosses	0	USD
CY2010Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	23172000000	USD
CY2011	us-gaap	Profit Loss ProfitLoss	15855000000	USD
CY2011	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	-3473000000	USD
CY2011	ibm	Common Stock Issued Under Employee Plan Value CommonStockIssuedUnderEmployeePlanValue	2394000000	USD
CY2011	ibm	Purchases Sales Treasury Stock Under Employee Plans Net PurchasesSalesTreasuryStockUnderEmployeePlansNet	175000000	USD
CY2011	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	15034000000	USD
CY2011	us-gaap	Stockholders Equity Other StockholdersEquityOther	-317000000	USD
CY2011	us-gaap	Minority Interest Period Increase Decrease MinorityInterestPeriodIncreaseDecrease	-29000000	USD
CY2010Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	10661000000	USD
CY2012Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	10412000000	USD
CY2011Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	11922000000	USD
CY2013Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	10716000000	USD
CY2013	ibm	Purchases Treasury Stock Under Employee Plans Value PurchasesTreasuryStockUnderEmployeePlansValue	336000000	USD
CY2012	ibm	Purchases Treasury Stock Under Employee Plans Value PurchasesTreasuryStockUnderEmployeePlansValue	468000000	USD
CY2011	ibm	Purchases Treasury Stock Under Employee Plans Value PurchasesTreasuryStockUnderEmployeePlansValue	289000000	USD
CY2012	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	4000000	USD
CY2011	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	-5000000	USD
CY2011	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	-1339000000	USD
CY2013	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	3144000000	USD
CY2012	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	-1587000000	USD
CY2013	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	4157000000	USD
CY2012	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-3874000000	USD
CY2011	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-3142000000	USD
CY2013	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	20641000000	USD
CY2012	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	12731000000	USD
CY2011	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	12713000000	USD
CY2013	us-gaap	Other Comprehensive Income Defined Benefit Plan Net Prior Service Cost Credit Arising During Period Before Tax OtherComprehensiveIncomeDefinedBenefitPlanNetPriorServiceCostCreditArisingDuringPeriodBeforeTax	-16000000	USD
CY2012Q4	ibm	Business Acquisition Accrued Payment BusinessAcquisitionAccruedPayment	35000000	USD
CY2013Q4	us-gaap	Goodwill Goodwill	31184000000	USD
CY2013Q4	us-gaap	Restructuring Reserve Noncurrent RestructuringReserveNoncurrent	440000000	USD
CY2012Q4	us-gaap	Restructuring Reserve Noncurrent RestructuringReserveNoncurrent	430000000	USD
CY2013Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	9934000000	USD
CY2012Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	7607000000	USD
CY2013	ibm	Intangible Assets Fully Amortized Retired IntangibleAssetsFullyAmortizedRetired	1177000000	USD
CY2012Q4	us-gaap	Goodwill Goodwill	29247000000	USD
CY2013Q4	us-gaap	Derivative Fair Value Of Derivative Liability DerivativeFairValueOfDerivativeLiability	6802000000	USD
CY2012Q4	us-gaap	Derivative Fair Value Of Derivative Liability DerivativeFairValueOfDerivativeLiability	4116000000	USD
CY2011	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	143000000	USD
CY2012Q4	us-gaap	Long Term Debt Fair Value LongTermDebtFairValue	27119000000	USD
CY2013Q4	us-gaap	Long Term Debt Fair Value LongTermDebtFairValue	34555000000	USD
CY2013Q4	us-gaap	Inventory Finished Goods Net Of Reserves InventoryFinishedGoodsNetOfReserves	444000000	USD
CY2013Q4	us-gaap	Inventory Work In Process And Raw Materials Net Of Reserves InventoryWorkInProcessAndRawMaterialsNetOfReserves	1866000000	USD
CY2013Q4	us-gaap	Inventory Net InventoryNet	2310000000	USD
CY2012Q4	us-gaap	Inventory Finished Goods Net Of Reserves InventoryFinishedGoodsNetOfReserves	475000000	USD
CY2012Q4	us-gaap	Inventory Work In Process And Raw Materials Net Of Reserves InventoryWorkInProcessAndRawMaterialsNetOfReserves	1812000000	USD
CY2012Q4	us-gaap	Inventory Net InventoryNet	2287000000	USD
CY2013	us-gaap	Interest Expense InterestExpense	402000000	USD
CY2013	us-gaap	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	1361000000	USD
CY2012	us-gaap	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	1478000000	USD
CY2013	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	587000000	USD
CY2012	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	545000000	USD
CY2011	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	553000000	USD
CY2013	us-gaap	Interest Expense Debt Excluding Amortization InterestExpenseDebtExcludingAmortization	405000000	USD
CY2012	us-gaap	Interest Expense Debt Excluding Amortization InterestExpenseDebtExcludingAmortization	470000000	USD
CY2011	us-gaap	Interest Expense Debt Excluding Amortization InterestExpenseDebtExcludingAmortization	402000000	USD
CY2013	ibm	Interest On Investment Derivative Activity InterestOnInvestmentDerivativeActivity	-3000000	USD
CY2012	ibm	Interest On Investment Derivative Activity InterestOnInvestmentDerivativeActivity	-11000000	USD
CY2011	ibm	Interest On Investment Derivative Activity InterestOnInvestmentDerivativeActivity	9000000	USD
CY2013	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	22000000	USD
CY2012	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	18000000	USD
CY2011	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	9000000	USD
CY2013	us-gaap	Interest Costs Incurred InterestCostsIncurred	1011000000	USD
CY2012	us-gaap	Interest Costs Incurred InterestCostsIncurred	1022000000	USD
CY2011	us-gaap	Interest Costs Incurred InterestCostsIncurred	973000000	USD
CY2013Q4	ibm	Business Divestitures Number Of Divestitures Completed BusinessDivestituresNumberOfDivestituresCompleted	2
CY2011Q2	ibm	Business Divestitures Number Of Divestitures Completed BusinessDivestituresNumberOfDivestituresCompleted	2
CY2013Q4	ibm	Other Taxes Payable OtherTaxesPayable	186000000	USD
CY2012Q4	ibm	Other Taxes Payable OtherTaxesPayable	24000000	USD
CY2013Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	4458000000	USD
CY2013Q4	us-gaap	Undistributed Earnings Of Foreign Subsidiaries UndistributedEarningsOfForeignSubsidiaries	52300000000	USD
CY2013Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	3902000000	USD
CY2012Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	5099000000	USD
CY2011Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	5090000000	USD
CY2013	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Expense UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense	-93000000	USD
CY2011	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Expense UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense	129000000	USD
CY2013Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	417000000	USD
CY2013Q4	ibm	Income Tax Appeals Tax Benefit On Foreign Tax Losses IncomeTaxAppealsTaxBenefitOnForeignTaxLosses	1141000000	USD
CY2013	us-gaap	Unrecognized Tax Benefits Period Increase Decrease UnrecognizedTaxBenefitsPeriodIncreaseDecrease	-1214000000	USD
CY2013Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards DeferredTaxAssetsTaxCreditCarryforwards	1007000000	USD
CY2013Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Postretirement Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPostretirementBenefits	3704000000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Postretirement Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPostretirementBenefits	5870000000	USD
CY2013Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	1262000000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	1666000000	USD
CY2013Q4	ibm	Deferred Tax Assets Operating Loss Carryforwards And Tax Credit Carryforwards Domestic DeferredTaxAssetsOperatingLossCarryforwardsAndTaxCreditCarryforwardsDomestic	982000000	USD
CY2012Q4	ibm	Deferred Tax Assets Operating Loss Carryforwards And Tax Credit Carryforwards Domestic DeferredTaxAssetsOperatingLossCarryforwardsAndTaxCreditCarryforwardsDomestic	954000000	USD
CY2013Q4	us-gaap	Deferred Tax Assets Deferred Income DeferredTaxAssetsDeferredIncome	964000000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Deferred Income DeferredTaxAssetsDeferredIncome	1018000000	USD
CY2013Q4	ibm	Deferred Tax Assets Operating Loss Carryforwards And Tax Credit Carryforwards Foreign DeferredTaxAssetsOperatingLossCarryforwardsAndTaxCreditCarryforwardsForeign	651000000	USD
CY2012Q4	ibm	Deferred Tax Assets Operating Loss Carryforwards And Tax Credit Carryforwards Foreign DeferredTaxAssetsOperatingLossCarryforwardsAndTaxCreditCarryforwardsForeign	681000000	USD
CY2013Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals	592000000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals	586000000	USD
CY2013Q4	us-gaap	Deferred Tax Assets Property Plant And Equipment DeferredTaxAssetsPropertyPlantAndEquipment	382000000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Property Plant And Equipment DeferredTaxAssetsPropertyPlantAndEquipment	456000000	USD
CY2013Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	1774000000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	1659000000	USD
CY2013Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	10311000000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	12890000000	USD
CY2013Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	734000000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	1187000000	USD
CY2013Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	9577000000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	11703000000	USD
CY2013Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	1346000000	USD
CY2012Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	1378000000	USD
CY2013Q4	ibm	Deferred Tax Liabilities Tax Deferred Expense Compensation And Benefits Pension And Postretirement Benefits DeferredTaxLiabilitiesTaxDeferredExpenseCompensationAndBenefitsPensionAndPostretirementBenefits	1219000000	USD
CY2012Q4	ibm	Deferred Tax Liabilities Tax Deferred Expense Compensation And Benefits Pension And Postretirement Benefits DeferredTaxLiabilitiesTaxDeferredExpenseCompensationAndBenefitsPensionAndPostretirementBenefits	257000000	USD
CY2013Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssets	1173000000	USD
CY2012Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssets	957000000	USD
CY2013Q4	us-gaap	Deferred Tax Liabilities Leasing Arrangements DeferredTaxLiabilitiesLeasingArrangements	1119000000	USD
CY2012Q4	us-gaap	Deferred Tax Liabilities Leasing Arrangements DeferredTaxLiabilitiesLeasingArrangements	2216000000	USD
CY2013Q4	us-gaap	Deferred Tax Liabilities Deferred Expense Capitalized Software DeferredTaxLiabilitiesDeferredExpenseCapitalizedSoftware	558000000	USD
CY2012Q4	us-gaap	Deferred Tax Liabilities Deferred Expense Capitalized Software DeferredTaxLiabilitiesDeferredExpenseCapitalizedSoftware	542000000	USD
CY2013Q4	ibm	Deferred Tax Liabilities Deferred Expense Transition Costs DeferredTaxLiabilitiesDeferredExpenseTransitionCosts	424000000	USD
CY2012Q4	ibm	Deferred Tax Liabilities Deferred Expense Transition Costs DeferredTaxLiabilitiesDeferredExpenseTransitionCosts	440000000	USD
CY2013Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	841000000	USD
CY2012Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	993000000	USD
CY2013Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	6680000000	USD
CY2012Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	6783000000	USD
CY2013	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.35	pure
CY2012	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.35	pure
CY2011	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.35	pure
CY2013	ibm	Effective Income Tax Rate Reconciliation Foreign Tax Differential EffectiveIncomeTaxRateReconciliationForeignTaxDifferential	-0.14	pure
CY2012	ibm	Effective Income Tax Rate Reconciliation Foreign Tax Differential EffectiveIncomeTaxRateReconciliationForeignTaxDifferential	-0.11	pure
CY2011	ibm	Effective Income Tax Rate Reconciliation Foreign Tax Differential EffectiveIncomeTaxRateReconciliationForeignTaxDifferential	-0.1	pure
CY2013	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0	pure
CY2012	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.01	pure
CY2011	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.02	pure
CY2013	ibm	Effective Income Tax Rate Reconciliation Domestic Incentives EffectiveIncomeTaxRateReconciliationDomesticIncentives	-0.03	pure
CY2012	ibm	Effective Income Tax Rate Reconciliation Domestic Incentives EffectiveIncomeTaxRateReconciliationDomesticIncentives	-0.01	pure
CY2011	ibm	Effective Income Tax Rate Reconciliation Domestic Incentives EffectiveIncomeTaxRateReconciliationDomesticIncentives	-0.01	pure
CY2013	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	-0.02	pure
CY2012	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0	pure
CY2011	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	-0.01	pure
CY2013	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.16	pure
CY2012	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.24	pure
CY2011	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.25	pure
CY2013Q4	us-gaap	Number Of Countries In Which Entity Operates NumberOfCountriesInWhichEntityOperates	175
CY2013	ibm	Tangible Assets Ratio TangibleAssetsRatio	0.1	pure
CY2013	ibm	Default Provision On Credit Facility DefaultProvisionOnCreditFacility	500000000	USD
CY2013	ibm	Net Interest Expense Ratio NetInterestExpenseRatio	2.20 to 1
CY2013	ibm	Defined Contribution Plans Estimated Future Employer Contributions In Next Fiscal Year DefinedContributionPlansEstimatedFutureEmployerContributionsInNextFiscalYear	1300000000	USD
CY2013	us-gaap	Finite Lived Intangible Assets Period Increase Decrease FiniteLivedIntangibleAssetsPeriodIncreaseDecrease	84000000	USD
CY2012	us-gaap	Interest Expense InterestExpense	459000000	USD
CY2013Q4	us-gaap	Defined Benefit Plan Plans With Benefit Obligations In Excess Of Plan Assets Aggregate Benefit Obligation DefinedBenefitPlanPlansWithBenefitObligationsInExcessOfPlanAssetsAggregateBenefitObligation	46458000000	USD
CY2012Q4	us-gaap	Defined Benefit Plan Plans With Benefit Obligations In Excess Of Plan Assets Aggregate Benefit Obligation DefinedBenefitPlanPlansWithBenefitObligationsInExcessOfPlanAssetsAggregateBenefitObligation	105473000000	USD
CY2013Q4	us-gaap	Defined Benefit Plan Plans With Benefit Obligations In Excess Of Plan Assets Aggregate Fair Value Of Plan Assets DefinedBenefitPlanPlansWithBenefitObligationsInExcessOfPlanAssetsAggregateFairValueOfPlanAssets	29481000000	USD
CY2012Q4	us-gaap	Defined Benefit Plan Plans With Benefit Obligations In Excess Of Plan Assets Aggregate Fair Value Of Plan Assets DefinedBenefitPlanPlansWithBenefitObligationsInExcessOfPlanAssetsAggregateFairValueOfPlanAssets	84338000000	USD
CY2013Q4	ibm	Defined Benefit Plan Plans With Plan Assets In Excess Of Benefit Obligation Aggregate Benefit Obligation DefinedBenefitPlanPlansWithPlanAssetsInExcessOfBenefitObligationAggregateBenefitObligation	58661000000	USD
CY2012Q4	ibm	Defined Benefit Plan Plans With Plan Assets In Excess Of Benefit Obligation Aggregate Benefit Obligation DefinedBenefitPlanPlansWithPlanAssetsInExcessOfBenefitObligationAggregateBenefitObligation	6956000000	USD
CY2013Q4	ibm	Defined Benefit Plan Plans With Plan Assets In Excess Of Benefit Obligation Aggregate Fair Value Of Plan Assets DefinedBenefitPlanPlansWithPlanAssetsInExcessOfBenefitObligationAggregateFairValueOfPlanAssets	64205000000	USD
CY2012Q4	ibm	Defined Benefit Plan Plans With Plan Assets In Excess Of Benefit Obligation Aggregate Fair Value Of Plan Assets DefinedBenefitPlanPlansWithPlanAssetsInExcessOfBenefitObligationAggregateFairValueOfPlanAssets	7901000000	USD
CY2013	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
CY2013	dei	Entity Voluntary Filers EntityVoluntaryFilers	No

Files In Submission

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$IBM
INTERNATIONAL BUSINESS MACHINES CORP Stock $ibm

2012 Q4 Form 10-K Financial Statement

#000104746914001302 Filed on February 25, 2014

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$IBM INTERNATIONAL BUSINESS MACHINES CORP Stock $ibm

2012 Q4 Form 10-K Financial Statement

#000104746914001302 Filed on February 25, 2014

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$IBM
INTERNATIONAL BUSINESS MACHINES CORP Stock $ibm