$IBM
INTERNATIONAL BUSINESS MACHINES CORP Stock $ibm

$ibm Overview Financials Valuation SEC Filings Company Website

2015 Q4 Form 8-K Financial Statement

#000110465916126857 Filed on June 13, 2016

Income Statement

Concept	2015 Q4	2015	2014 Q4
Revenue	$22.06B	$49.91B	$24.11B
YoY Change	-8.52%	-46.21%	-11.95%
Cost Of Revenue	$10.65B	$41.06B	$11.25B
YoY Change	-5.32%	-11.49%	-13.77%
Gross Profit	$11.41B	$40.68B	$12.86B
YoY Change	-11.31%	-12.33%	-10.29%
Gross Profit Margin	51.71%	81.51%	53.34%
Selling, General & Admin	$5.101B	$19.51B	$5.375B
YoY Change	-5.1%	-15.82%	-9.48%
% of Gross Profit	44.72%	47.96%	41.79%
Research & Development	$1.362B	$3.064B	$1.320B
YoY Change	3.18%	-43.65%	-9.09%
% of Gross Profit	11.94%	7.53%	10.26%
Depreciation & Amortization	$990.0M	$2.662B	$1.046B
YoY Change	-5.35%	-15.36%	-13.84%
% of Gross Profit	8.68%	6.54%	8.13%
Operating Expenses	$6.285B	$3.064B	$5.162B
YoY Change	21.76%	-89.29%	-28.39%
Operating Profit	$5.122B	$37.62B	$7.700B
YoY Change	-33.48%	111.47%	8.01%
Interest Expense	-$13.00M	$468.0M	-$27.00M
YoY Change	-51.85%	-3.31%	145.45%
% of Operating Profit	-0.25%	1.24%	-0.35%
Other Income/Expense, Net	$2.000M	$1.000M
YoY Change
Pretax Income	$5.099B	$5.915B	$7.095B
YoY Change	-28.13%	-70.4%	-0.1%
Income Tax	$638.0M	$2.581B	$1.579B
% Of Pretax Income	12.51%	43.63%	22.26%
Net Earnings	$4.464B	$13.19B	$5.485B
YoY Change	-18.61%	9.72%	-11.32%
Net Earnings / Revenue	20.24%	26.43%	22.75%
Basic Earnings Per Share		$13.48
Diluted Earnings Per Share	$4.588M	$13.42	$5.513M
COMMON SHARES
Basic Shares Outstanding		978.7M shares
Diluted Shares Outstanding		982.7M shares

Balance Sheet

Concept	2015 Q4	2015	2014 Q4
SHORT-TERM ASSETS
Cash & Short-Term Investments	$8.200B	$8.200B	$8.500B
YoY Change	-3.53%	-3.53%	-23.44%
Cash & Equivalents	$7.686B	$7.686B	$8.476B
Short-Term Investments	$514.0M	$514.0M	$24.00M
Other Short-Term Assets	$4.199B	$4.199B	$4.943B
YoY Change	-15.05%	-15.05%	-18.99%
Inventory	$1.551B	$1.551B	$2.103B
Prepaid Expenses
Receivables	$8.333B	$8.333B	$9.090B
Other Receivables	$1.201B	$20.22B	$2.906B
Total Short-Term Assets	$42.50B	$42.50B	$47.38B
YoY Change	-10.29%	-10.29%	-7.74%
LONG-TERM ASSETS
Property, Plant & Equipment	$10.73B	$10.73B	$10.77B
YoY Change	-0.41%	-0.41%	-22.07%
Goodwill	$32.02B		$30.56B
YoY Change	4.79%		-2.01%
Intangibles	$3.487B		$3.104B
YoY Change	12.34%		-19.81%
Long-Term Investments	$82.00M	$475.0M	$98.00M
YoY Change	-16.33%	-20.03%	-10.91%
Other Assets	$5.187B	$10.75B	$5.520B
YoY Change	-6.03%	-18.86%	18.99%
Total Long-Term Assets	$67.99B	$67.99B	$69.89B
YoY Change	-2.72%	-2.72%	-5.92%
TOTAL ASSETS
Total Short-Term Assets	$42.50B	$42.50B	$47.38B
Total Long-Term Assets	$67.99B	$67.99B	$69.89B
Total Assets	$110.5B	$110.5B	$117.3B
YoY Change	-5.78%	-5.78%	-6.66%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$6.028B	$6.028B	$6.864B
YoY Change	-12.18%	-12.18%	-8.0%
Accrued Expenses	$7.913B	$7.913B	$10.03B
YoY Change	-21.07%	-21.07%	16.02%
Deferred Revenue
YoY Change
Short-Term Debt	$1.190B	$1.190B	$1.130B
YoY Change	5.31%	5.31%	-62.45%
Long-Term Debt Due	$5.271B	$5.271B	$4.601B
YoY Change	14.56%	14.56%	19.38%
Total Short-Term Liabilities	$34.27B	$34.27B	$39.58B
YoY Change	-13.42%	-13.42%	-1.43%
LONG-TERM LIABILITIES
Long-Term Debt	$33.43B	$33.43B	$34.99B
YoY Change	-4.47%	-4.47%	6.5%
Other Long-Term Liabilities	$8.099B	$28.12B	$8.733B
YoY Change	-7.26%	-7.97%	-12.09%
Total Long-Term Liabilities	$41.53B	$61.55B	$43.72B
YoY Change	-5.02%	-6.1%	2.18%
TOTAL LIABILITIES
Total Short-Term Liabilities	$34.27B	$34.27B	$39.58B
Total Long-Term Liabilities	$41.53B	$61.55B	$43.72B
Total Liabilities	$96.07B	$96.23B	$105.3B
YoY Change	-8.73%	-8.7%	1.9%
SHAREHOLDERS EQUITY
Retained Earnings	$146.1B		$137.8B
YoY Change	6.05%		5.96%
Common Stock
YoY Change
Preferred Stock
YoY Change
Treasury Stock (at cost)	$155.5B		$150.7B
YoY Change	3.19%		9.82%
Treasury Stock Shares	1.255B shares		1.225B shares
Shareholders Equity	$14.26B	$14.26B	$11.87B
YoY Change
Total Liabilities & Shareholders Equity	$110.5B	$110.5B	$117.3B
YoY Change	-5.78%	-5.78%	-7.09%

Cashflow Statement

Concept	2015 Q4	2015	2014 Q4
OPERATING ACTIVITIES
Net Income	$4.464B	$13.19B	$5.485B
YoY Change	-18.61%	9.72%	-11.32%
Depreciation, Depletion And Amortization	$990.0M	$2.662B	$1.046B
YoY Change	-5.35%	-15.36%	-13.84%
Cash From Operating Activities	$5.278B	$17.26B	$6.058B
YoY Change	-12.88%	2.29%	-7.2%
INVESTING ACTIVITIES
Capital Expenditures	-$1.074B	$3.579B	-$1.054B
YoY Change	1.9%	-4.3%	-10.3%
Acquisitions		$3.349B
YoY Change		410.52%
Other Investing Activities	-$4.371B	-$4.008B	-$182.0M
YoY Change	2301.65%	-439.09%	-89.47%
Cash From Investing Activities	-$5.445B	-$8.159B	-$1.236B
YoY Change	340.53%	171.88%	-57.42%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net		$4.609B
YoY Change		-66.31%
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-1.348B	-9.413B	-5.699B
YoY Change	-76.35%	-39.08%	89.15%
NET CHANGE
Cash From Operating Activities	5.278B	17.26B	6.058B
Cash From Investing Activities	-5.445B	-8.159B	-1.236B
Cash From Financing Activities	-1.348B	-9.413B	-5.699B
Net Change In Cash	-1.515B	7.842B	-877.0M
YoY Change	72.75%	-594.76%	-243.3%
FREE CASH FLOW
Cash From Operating Activities	$5.278B	$17.26B	$6.058B
Capital Expenditures	-$1.074B	$3.579B	-$1.054B
Free Cash Flow	$6.352B	$13.68B	$7.112B
YoY Change	-10.69%	4.17%	-7.67%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2015Q4	us-gaap	Goodwill Impaired Accumulated Impairment Loss GoodwillImpairedAccumulatedImpairmentLoss	0	USD
CY2014Q4	us-gaap	Goodwill Impaired Accumulated Impairment Loss GoodwillImpairedAccumulatedImpairmentLoss	0	USD
CY2014	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	USD
CY2015	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	-54000000	USD
CY2015	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax	32000000	USD
CY2015	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	-53000000	USD
CY2015	us-gaap	Sales Revenue Services Net SalesRevenueServicesNet	49911000000	USD
CY2015	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	5915000000	USD
CY2014	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	7509000000	USD
CY2013	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	7577000000	USD
CY2015	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	10030000000	USD
CY2014	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	12477000000	USD
CY2013	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	12667000000	USD
CY2012Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	5672000000	USD
CY2015	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	464000000	USD
CY2014	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	697000000	USD
CY2013	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	829000000	USD
CY2015	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	569000000	USD
CY2014	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	586000000	USD
CY2013	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	417000000	USD
CY2015	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	1348000000	USD
CY2014	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	579000000	USD
CY2013	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	2201000000	USD
CY2015	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	215000000	USD
CY2013	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	259000000	USD
CY2015	ibm	Rental Expense RentalExpense	1474000000	USD
CY2014	ibm	Rental Expense RentalExpense	1592000000	USD
CY2013	ibm	Rental Expense RentalExpense	1759000000	USD
CY2015Q4	us-gaap	Operating Leases Future Minimum Payments Due Current OperatingLeasesFutureMinimumPaymentsDueCurrent	1347000000	USD
CY2015Q4	us-gaap	Operating Leases Future Minimum Payments Due In Two Years OperatingLeasesFutureMinimumPaymentsDueInTwoYears	1231000000	USD
CY2015Q4	us-gaap	Operating Leases Future Minimum Payments Due In Three Years OperatingLeasesFutureMinimumPaymentsDueInThreeYears	1107000000	USD
CY2015Q4	us-gaap	Operating Leases Future Minimum Payments Due In Four Years OperatingLeasesFutureMinimumPaymentsDueInFourYears	985000000	USD
CY2015Q4	us-gaap	Operating Leases Future Minimum Payments Due In Five Years OperatingLeasesFutureMinimumPaymentsDueInFiveYears	776000000	USD
CY2015Q4	us-gaap	Operating Leases Future Minimum Payments Due Thereafter OperatingLeasesFutureMinimumPaymentsDueThereafter	988000000	USD
CY2015Q4	ibm	Operating Leases Vacant Space Future Minimum Payments Due Current OperatingLeasesVacantSpaceFutureMinimumPaymentsDueCurrent	14000000	USD
CY2015Q4	ibm	Operating Leases Vacant Space Future Minimum Payments Due In Two Years OperatingLeasesVacantSpaceFutureMinimumPaymentsDueInTwoYears	4000000	USD
CY2015Q4	ibm	Operating Leases Vacant Space Future Minimum Payments Due In Three Years OperatingLeasesVacantSpaceFutureMinimumPaymentsDueInThreeYears	1000000	USD
CY2015Q4	us-gaap	Future Minimum Sublease Rentals Sale Leaseback Transactions Within One Year FutureMinimumSubleaseRentalsSaleLeasebackTransactionsWithinOneYear	11000000	USD
CY2015Q4	us-gaap	Future Minimum Sublease Rentals Sale Leaseback Transactions Within Two Years FutureMinimumSubleaseRentalsSaleLeasebackTransactionsWithinTwoYears	7000000	USD
CY2015Q4	us-gaap	Future Minimum Sublease Rentals Sale Leaseback Transactions Within Three Years FutureMinimumSubleaseRentalsSaleLeasebackTransactionsWithinThreeYears	5000000	USD
CY2015Q4	us-gaap	Future Minimum Sublease Rentals Sale Leaseback Transactions Within Four Years FutureMinimumSubleaseRentalsSaleLeasebackTransactionsWithinFourYears	4000000	USD
CY2015Q4	us-gaap	Future Minimum Sublease Rentals Sale Leaseback Transactions Within Five Years FutureMinimumSubleaseRentalsSaleLeasebackTransactionsWithinFiveYears	1000000	USD
CY2015Q4	us-gaap	Future Minimum Sublease Rentals Sale Leaseback Transactions Thereafter FutureMinimumSubleaseRentalsSaleLeasebackTransactionsThereafter	1000000	USD
CY2015Q4	us-gaap	Capital Leases Future Minimum Payments Due Current CapitalLeasesFutureMinimumPaymentsDueCurrent	7000000	USD
CY2015Q4	us-gaap	Capital Leases Future Minimum Payments Due In Two Years CapitalLeasesFutureMinimumPaymentsDueInTwoYears	2000000	USD
CY2015Q4	us-gaap	Capital Leases Future Minimum Payments Due In Three Years CapitalLeasesFutureMinimumPaymentsDueInThreeYears	2000000	USD
CY2015Q4	us-gaap	Capital Leases Future Minimum Payments Due In Four Years CapitalLeasesFutureMinimumPaymentsDueInFourYears	2000000	USD
CY2015Q4	us-gaap	Capital Leases Future Minimum Payments Due In Five Years CapitalLeasesFutureMinimumPaymentsDueInFiveYears	1000000	USD
CY2015	ibm	Scientific Research Software Related Expenses And In Process Research And Development Expenses ScientificResearchSoftwareRelatedExpensesAndInProcessResearchAndDevelopmentExpenses	5178000000	USD
CY2014	ibm	Scientific Research Software Related Expenses And In Process Research And Development Expenses ScientificResearchSoftwareRelatedExpensesAndInProcessResearchAndDevelopmentExpenses	5595000000	USD
CY2013	ibm	Scientific Research Software Related Expenses And In Process Research And Development Expenses ScientificResearchSoftwareRelatedExpensesAndInProcessResearchAndDevelopmentExpenses	5959000000	USD
CY2015	us-gaap	Research And Development Expense Software Excluding Acquired In Process Cost ResearchAndDevelopmentExpenseSoftwareExcludingAcquiredInProcessCost	3064000000	USD
CY2014	us-gaap	Research And Development Expense Software Excluding Acquired In Process Cost ResearchAndDevelopmentExpenseSoftwareExcludingAcquiredInProcessCost	3064000000	USD
CY2013	us-gaap	Research And Development Expense Software Excluding Acquired In Process Cost ResearchAndDevelopmentExpenseSoftwareExcludingAcquiredInProcessCost	3077000000	USD
CY2015	ibm	Product Related Engineering Expenses ProductRelatedEngineeringExpenses	267000000	USD
CY2014	ibm	Product Related Engineering Expenses ProductRelatedEngineeringExpenses	211000000	USD
CY2013	ibm	Product Related Engineering Expenses ProductRelatedEngineeringExpenses	267000000	USD
CY2015	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	-321000000	USD
CY2014	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	1134000000	USD
CY2013	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	1694000000	USD
CY2015	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	553000000	USD
CY2014	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	105000000	USD
CY2013	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-708000000	USD
CY2015	us-gaap	Federal Income Tax Expense Benefit Continuing Operations FederalIncomeTaxExpenseBenefitContinuingOperations	232000000	USD
CY2014	us-gaap	Federal Income Tax Expense Benefit Continuing Operations FederalIncomeTaxExpenseBenefitContinuingOperations	1239000000	USD
CY2013	us-gaap	Federal Income Tax Expense Benefit Continuing Operations FederalIncomeTaxExpenseBenefitContinuingOperations	986000000	USD
CY2015	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	128000000	USD
CY2014	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	541000000	USD
CY2013	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	277000000	USD
CY2015	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	116000000	USD
CY2014	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-105000000	USD
CY2013	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-330000000	USD
CY2015	us-gaap	State And Local Income Tax Expense Benefit Continuing Operations StateAndLocalIncomeTaxExpenseBenefitContinuingOperations	244000000	USD
CY2014	us-gaap	State And Local Income Tax Expense Benefit Continuing Operations StateAndLocalIncomeTaxExpenseBenefitContinuingOperations	436000000	USD
CY2013	us-gaap	State And Local Income Tax Expense Benefit Continuing Operations StateAndLocalIncomeTaxExpenseBenefitContinuingOperations	-53000000	USD
CY2015	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	2101000000	USD
CY2014	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	2825000000	USD
CY2013	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	3067000000	USD
CY2015	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	4000000	USD
CY2014	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	-266000000	USD
CY2013	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	-637000000	USD
CY2015	us-gaap	Foreign Income Tax Expense Benefit Continuing Operations ForeignIncomeTaxExpenseBenefitContinuingOperations	2105000000	USD
CY2014	us-gaap	Foreign Income Tax Expense Benefit Continuing Operations ForeignIncomeTaxExpenseBenefitContinuingOperations	2559000000	USD
CY2013	us-gaap	Foreign Income Tax Expense Benefit Continuing Operations ForeignIncomeTaxExpenseBenefitContinuingOperations	2430000000	USD
CY2015	ibm	Taxes Excluding Income Taxes TaxesExcludingIncomeTaxes	3497000000	USD
CY2014	ibm	Taxes Excluding Income Taxes TaxesExcludingIncomeTaxes	4068000000	USD
CY2013	ibm	Taxes Excluding Income Taxes TaxesExcludingIncomeTaxes	4198000000	USD
CY2015	ibm	Taxes Included In Income From Continuing Operations TaxesIncludedInIncomeFromContinuingOperations	5961000000	USD
CY2014	ibm	Taxes Included In Income From Continuing Operations TaxesIncludedInIncomeFromContinuingOperations	6685000000	USD
CY2013	ibm	Taxes Included In Income From Continuing Operations TaxesIncludedInIncomeFromContinuingOperations	7238000000	USD
CY2015Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	742000000	USD
CY2015	dei	Entity Registrant Name EntityRegistrantName	INTERNATIONAL BUSINESS MACHINES CORP
CY2015	dei	Amendment Flag AmendmentFlag	false
CY2015	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2014	ibm	Intellectual Property And Custom Development Income IntellectualPropertyAndCustomDevelopmentIncome	742000000	USD
CY2014	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax	958000000	USD
CY2013	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax	43000000	USD
CY2014	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesBeforeTax	97000000	USD
CY2013	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesBeforeTax	166000000	USD
CY2014	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Before Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesBeforeTax	861000000	USD
CY2013	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Before Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesBeforeTax	-123000000	USD
CY2014	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Net Unamortized Gain Loss Arising During Period Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax	-9799000000	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
CY2014	us-gaap	Other Comprehensive Income Loss Finalization Of Pension And Non Pension Postretirement Plan Valuation Before Tax OtherComprehensiveIncomeLossFinalizationOfPensionAndNonPensionPostretirementPlanValuationBeforeTax	24000000	USD
CY2013	us-gaap	Other Comprehensive Income Loss Finalization Of Pension And Non Pension Postretirement Plan Valuation Before Tax OtherComprehensiveIncomeLossFinalizationOfPensionAndNonPensionPostretirementPlanValuationBeforeTax	-3000000	USD
CY2014	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 Amortization Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Prior Service Cost Credit Before Tax OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditBeforeTax	-114000000	USD
CY2014	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax	-2531000000	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
CY2014	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax	7357000000	USD
CY2013	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax	-8767000000	USD
CY2014	us-gaap	Other Comprehensive Income Loss Before Tax OtherComprehensiveIncomeLossBeforeTax	-8156000000	USD
CY2013	us-gaap	Other Comprehensive Income Loss Before Tax OtherComprehensiveIncomeLossBeforeTax	7301000000	USD
CY2014	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Before Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentBeforeTax	-1636000000	USD
CY2013	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Before Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentBeforeTax	-1335000000	USD
CY2014	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	-29000000	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
CY2014	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax	-24000000	USD
CY2013	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax	-8000000	USD
CY2013	us-gaap	Revenues Revenues	98367000000	USD
CY2015Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2014Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2015	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	-86000000	USD
CY2014	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	-5000000	USD
CY2013	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	8000000	USD
CY2014	us-gaap	Sales Revenue Services Net SalesRevenueServicesNet	55673000000	USD
CY2013	us-gaap	Sales Revenue Services Net SalesRevenueServicesNet	57655000000	USD
CY2014	us-gaap	Sales Revenue Goods Net SalesRevenueGoodsNet	35063000000	USD
CY2013	us-gaap	Sales Revenue Goods Net SalesRevenueGoodsNet	38666000000	USD
CY2014	us-gaap	Financial Services Revenue FinancialServicesRevenue	2057000000	USD
CY2013	us-gaap	Financial Services Revenue FinancialServicesRevenue	2047000000	USD
CY2014	us-gaap	Cost Of Services CostOfServices	36034000000	USD
CY2013	us-gaap	Cost Of Services CostOfServices	37564000000	USD
CY2014	us-gaap	Cost Of Goods Sold CostOfGoodsSold	9312000000	USD
CY2013	us-gaap	Cost Of Goods Sold CostOfGoodsSold	11009000000	USD
CY2014	us-gaap	Financial Services Costs FinancialServicesCosts	1040000000	USD
CY2013	us-gaap	Financial Services Costs FinancialServicesCosts	1110000000	USD
CY2014	us-gaap	Cost Of Revenue CostOfRevenue	46386000000	USD
CY2013	us-gaap	Cost Of Revenue CostOfRevenue	49683000000	USD
CY2014	us-gaap	Gross Profit GrossProfit	46407000000	USD
CY2013	us-gaap	Gross Profit GrossProfit	48684000000	USD
CY2014	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	23180000000	USD
CY2013	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	23451000000	USD
CY2014	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	5437000000	USD
CY2013	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	5743000000	USD
CY2014	us-gaap	Revenues Revenues	92793000000	USD
CY2013	ibm	Intellectual Property And Custom Development Income IntellectualPropertyAndCustomDevelopmentIncome	822000000	USD
CY2014	ibm	Other Income And Expense OtherIncomeAndExpense	-1938000000	USD
CY2013	ibm	Other Income And Expense OtherIncomeAndExpense	-333000000	USD
CY2013	us-gaap	Interest Expense InterestExpense	402000000	USD
CY2014	ibm	Expense And Other Income ExpenseAndOtherIncome	26421000000	USD
CY2013	ibm	Expense And Other Income ExpenseAndOtherIncome	28440000000	USD
CY2014	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	19986000000	USD
CY2013	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	20244000000	USD
CY2014	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	4234000000	USD
CY2013	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	3363000000	USD
CY2015Q4	us-gaap	Notes And Loans Receivable Net Current NotesAndLoansReceivableNetCurrent	19020000000	USD
CY2015Q4	us-gaap	Notes And Loans Receivable Net Noncurrent NotesAndLoansReceivableNetNoncurrent	10013000000	USD
CY2015Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-29607000000	USD
CY2014Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-27875000000	USD
CY2015	us-gaap	Use Of Estimates UseOfEstimates	<div><p style='text-align:left;margin-top:0pt;margin-bottom:0pt;line-height:12pt;' ><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;line-height:12pt;' ><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;line-height:12pt;' ><font style='font-family:Times New Roman;font-size:10pt;margin-left:0pt;' >The preparation of financial statements in conformity wi</font><font style='font-family:Times New Roman;font-size:10pt;' >th GAAP requires management to make estimates and assumptions that affect the amounts of assets, liabilities, revenue, costs, expenses and other comprehensive income/(loss) (OCI) that are reported in the Consolidated Financial Statements and accompanying d</font><font style='font-family:Times New Roman;font-size:10pt;' >isclosures. These estimates are based on management’s best knowledge of current events, historical experience, actions that the company may undertake in the future and on various other assumptions that are believed to be reasonable under the circumstances.</font><font style='font-family:Times New Roman;font-size:10pt;' > As a result, actual results may be different from these estimates. See “Critical Accounting Estimates” on pages 48 to 51 for a discussion of the company’s critical accounting estimates.</font></p></div>
CY2015	us-gaap	Revenue Recognition Multiple Element Arrangements RevenueRecognitionMultipleElementArrangements	<div><p style='text-align:left;margin-top:0pt;margin-bottom:0pt;line-height:12pt;' ><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;line-height:12pt;' ><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;line-height:12pt;' ><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;line-height:12pt;' ><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</font><font style='font-family:Times New Roman;font-size:10pt;' > services based on the needs 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 </font><font style='font-family:Times New Roman;font-size:10pt;' >may include post-contract 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, w</font><font style='font-family:Times New Roman;font-size:10pt;' >ith the hardware and software 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 t</font><font style='font-family:Times New Roman;font-size:10pt;' >he company on a long-term, 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 </font><font style='font-family:Times New Roman;font-size:10pt;' >the hardware and software 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 g</font><font style='font-family:Times New Roman;font-size:10pt;' >uidance. Examples of such 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 arrangeme</font><font style='font-family:Times New Roman;font-size:10pt;' >nts into separate units of accounting (</font><font style='font-family:Times New Roman;font-size:10pt;' >separability</font><font style='font-family:Times New Roman;font-size:10pt;' >) 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</font><font style='font-family:Times New Roman;font-size:10pt;' > </font><font style='font-family:Times New Roman;font-size:10pt;' >separability</font><font style='font-family:Times New Roman;font-size:10pt;' > and allocation. 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;line-height:12pt;' ><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;line-height:12pt;' ><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;line-height:12pt;' ><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;' >If the arrangement 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;line-height:12pt;' ><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;line-height:12pt;' ><font style='font-family:Times New Roman;font-size:10pt;margin-left:0pt;' >If these criteria are not met, the arrangement is accounted for as one unit of accounting which would result in revenue being recognized </font><font style='font-family:Times New Roman;font-size:10pt;' >ratably</font><font style='font-family:Times New Roman;font-size:10pt;' > over the contract term or being deferred until the earlier of when such criteria are met or when the last undel</font><font style='font-family:Times New Roman;font-size:10pt;' >ivered element is delivered. If these criteria are met for 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</font><font style='font-family:Times New Roman;font-size:10pt;' > relative selling price. The following revenue policies are then applied to each unit of accounting, as applicable.</font></p><p style='text-align:left;margin-top:0pt;margin-bottom:0pt;line-height:12pt;' ><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;line-height:12pt;' ><font style='font-family:Times New Roman;font-size:10pt;margin-left:16pt;' >Revenue from the company’s cloud, analytics, mobile, security, and cognitive offerings follow the specific revenue recognition policies fo</font><font style='font-family:Times New Roman;font-size:10pt;' >r multiple deliverable arrangements and for each major category of revenue depending on the type of offering which can be comprised of services, hardware and/or software.</font></p></div>
CY2015	us-gaap	Revenue Recognition Sales Of Services RevenueRecognitionSalesOfServices	<div><p style='text-align:left;margin-top:0pt;margin-bottom:0pt;line-height:12pt;' ><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;line-height:12pt;' ><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;line-height:12pt;' ><font style='font-family:Times New Roman;font-size:10pt;margin-left:0pt;' >The company’s primary services offerings include information technology </font><font style='font-family:Times New Roman;font-size:10pt;' >(IT) datacenter and business process outsourcing, application management services, consulting and systems integration, technology infrastructure and system maintenance, hosting and the design and development of complex IT systems to a client’s specificati</font><font style='font-family:Times New Roman;font-size:10pt;' >ons (design and build). </font><font style='font-family:Times New Roman;font-size:10pt;' >Many of these services can be delivered entirely or partially through the cloud. </font><font style='font-family:Times New Roman;font-size:10pt;' >These services are provided on a time-and-material basis, as a fixed-price contract or as a fixed-price per measure of output contract and the contrac</font><font style='font-family:Times New Roman;font-size:10pt;' >t terms range from less than one year to over 10 years.</font></p><p style='text-align:left;margin-top:0pt;margin-bottom:0pt;line-height:12pt;' ><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;line-height:12pt;' ><font style='font-family:Times New Roman;font-size:10pt;margin-left:16pt;' >Revenue from IT datacenter and business process outsourcing contracts is recognized in the period the services are provided using either an objective measure of output or on a straight-line basis ov</font><font style='font-family:Times New Roman;font-size:10pt;' >er 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;line-height:12pt;' ><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;line-height:12pt;' ><font style='font-family:Times New Roman;font-size:10pt;margin-left:16pt;' >Revenue from application management services, technology infrastructure and system maintenance and hosting contracts </font><font style='font-family:Times New Roman;font-size:10pt;' >is recognized on a straight-line basis over the terms of the contracts. Revenue from time-and-material contracts is recognized as </font><font style='font-family:Times New Roman;font-size:10pt;' >labor</font><font style='font-family:Times New Roman;font-size:10pt;' > hours are delivered and direct expenses are incurred. Revenue related to extended warranty and product maintenance contr</font><font style='font-family:Times New Roman;font-size:10pt;' >acts is recognized on a straight-line basis over the delivery period.</font></p><p style='text-align:left;margin-top:0pt;margin-bottom:0pt;line-height:12pt;' ><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;line-height:12pt;' ><font style='font-family:Times New Roman;font-size:10pt;margin-left:16pt;' >Revenue from fixed-price design and build contracts is recognized under the percentage-of-completion (POC) method. Under the POC method, revenue is recognized based on the </font><font style='font-family:Times New Roman;font-size:10pt;' >labor</font><font style='font-family:Times New Roman;font-size:10pt;' > costs </font><font style='font-family:Times New Roman;font-size:10pt;' >incurred to date as a percentage of the total estimated </font><font style='font-family:Times New Roman;font-size:10pt;' >labor</font><font style='font-family:Times New Roman;font-size:10pt;' > costs to fulfill the contract. If circumstances arise that change the original estimates of revenues, costs, or extent of progress toward completion, revisions to the estimates are made. These r</font><font style='font-family:Times New Roman;font-size:10pt;' >evisions may result in increases or decreases in estimated revenues or costs, and such revisions are reflected in income in the period in 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;line-height:12pt;' ><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;line-height:12pt;' ><font style='font-family:Times New Roman;font-size:10pt;margin-left:16pt;' >The company performs ongoing pro</font><font style='font-family:Times New Roman;font-size:10pt;' >fitability analyses of its services contracts accounted for under the POC method in order to determine whether the latest estimates of revenues, costs and profits require updating. If at any time these estimates indicate that the contract will be unprofita</font><font style='font-family:Times New Roman;font-size:10pt;' >ble, the entire estimated loss for the remainder of the contract is recorded immediately. For non-POC method services contracts, any losses are recorded as incurred.</font></p><p style='text-align:left;margin-top:0pt;margin-bottom:0pt;line-height:12pt;' ><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;line-height:12pt;' ><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 fr</font><font style='font-family:Times New Roman;font-size:10pt;' >om performing the services. Deferred income of $</font><font style='font-family:Times New Roman;font-size:10pt;' >6,039</font><font style='font-family:Times New Roman;font-size:10pt;' > million and $</font><font style='font-family:Times New Roman;font-size:10pt;' >6,352 </font><font style='font-family:Times New Roman;font-size:10pt;' >million at December 31, 2015 and 2014, respectively, is included in the Consolidated Statement of Financial Position. In other services contracts, the company performs the services pr</font><font style='font-family:Times New Roman;font-size:10pt;' >ior to billing the client. Unbilled accounts receivable of $</font><font style='font-family:Times New Roman;font-size:10pt;' >1,630 </font><font style='font-family:Times New Roman;font-size:10pt;' >million and $</font><font style='font-family:Times New Roman;font-size:10pt;' >1,833 </font><font style='font-family:Times New Roman;font-size:10pt;' >million at December 31, 2015 and 2014, respectively, 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;line-height:12pt;' ><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;line-height:12pt;' ><font style='font-family:Times New Roman;font-size:10pt;margin-left:16pt;' >Billings usu</font><font style='font-family:Times New Roman;font-size:10pt;' >ally occur in the month after the company performs the services or in accordance with specific contractual provisions. Unbilled receivables are expected to be billed within four months.</font></p></div>
CY2015	us-gaap	Revenue Recognition Sales Of Goods RevenueRecognitionSalesOfGoods	<div><p style='text-align:left;margin-top:0pt;margin-bottom:0pt;line-height:12pt;' ><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;line-height:12pt;' ><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;line-height:12pt;' ><font style='font-family:Times New Roman;font-size:10pt;margin-left:0pt;' >The company’s hardware offerings include the sale or leas</font><font style='font-family:Times New Roman;font-size:10pt;' >e of system servers, storage solutions and the sale of semiconductors. The company also offers installation services for its more complex hardware products.</font></p><p style='text-align:left;margin-top:0pt;margin-bottom:0pt;line-height:12pt;' ><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;line-height:12pt;' ><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</font><font style='font-family:Times New Roman;font-size:10pt;' > to the client and there are no unfulfilled company obligations that affect the client’s final acceptance of the arrangement. Any cost of standard warranties and remaining obligations that are inconsequential or perfunctory are accrued when the correspondi</font><font style='font-family:Times New Roman;font-size:10pt;' >ng revenue is recognized. Revenue from rentals and operating leases is recognized on a straight-line basis over the term of the rental or lease.</font></p></div>
CY2015	us-gaap	Revenue Recognition Software RevenueRecognitionSoftware	<div><p style='text-align:left;margin-top:0pt;margin-bottom:0pt;line-height:12pt;' ><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;line-height:12pt;' ><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;line-height:12pt;' ><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 </font><font style='font-family:Times New Roman;font-size:10pt;' >license term if all revenue recognition criteria have been met. Revenue from term (recurring license charge) license software is recognized on a straight-line basis over the period that the client is entitled to use the license. Revenue from post-contract </font><font style='font-family:Times New Roman;font-size:10pt;' >support, which may include unspecified upgrades on a when-and-if-available basis, is recognized on a straight-line basis over the period such items are delivered. Revenue from software hosting or Software-as-a-Service arrangements is recognized as the serv</font><font style='font-family:Times New Roman;font-size:10pt;' >ice is delivered, generally on a straight-line basis, over the longer of the term of the arrangement or the expected period of the customer relationship. In software hosting arrangements, the rights provided to the customer (e.g., ownership of a license, c</font><font style='font-family:Times New Roman;font-size:10pt;' >ontract termination provisions and the feasibility of the customer to operate the software) are considered in determining whether the arrangement includes a license. In arrangements which include a software license, the associated revenue is recognized ac</font><font style='font-family:Times New Roman;font-size:10pt;' >cording to whether the license is perpetual or term, subject to the guidance above. </font></p><p style='text-align:left;line-height:12pt;' ></p><p style='text-align:left;margin-top:0pt;margin-bottom:0pt;line-height:12pt;' ><font style='font-family:Times New Roman;font-size:10pt;margin-left:15.85pt;' >In multiple-deliverable arrangements that include software that is more than incidental to the products or services as a whole (software multiple-deliverable arrangemen</font><font style='font-family:Times New Roman;font-size:10pt;' >ts), software and software-related elements are accounted 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. Tan</font><font style='font-family:Times New Roman;font-size:10pt;' >gible products containing software components and non-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 othe</font><font style='font-family:Times New Roman;font-size:10pt;' >r applicable revenue recognition guidance.</font></p><p style='text-align:left;margin-top:0pt;margin-bottom:0pt;line-height:12pt;' ><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;line-height:12pt;' ><font style='font-family:Times New Roman;font-size:10pt;margin-left:16pt;' >A software 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;line-height:12pt;' ><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;line-height:12pt;' ><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 </font><font style='font-family:Times New Roman;font-size:10pt;' >dependent on the undelivered element(s);</font></p><p style='text-align:left;margin-top:0pt;margin-bottom:0pt;line-height:12pt;' ><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;' >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 comp</font><font style='font-family:Times New Roman;font-size:10pt;' >any on a regular basis and not as part of the multiple-deliverable arrangement; and</font></p><p style='text-align:left;margin-top:0pt;margin-bottom:0pt;line-height:12pt;' ><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;line-height:12pt;' ><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;line-height:12pt;' ><font style='font-family:Times New Roman;font-size:10pt;margin-left:0pt;' >If any one of these criteria is not met, t</font><font style='font-family:Times New Roman;font-size:10pt;' >he arrangement is accounted for as one unit of accounting which would result in revenue being recognized </font><font style='font-family:Times New Roman;font-size:10pt;' >ratably</font><font style='font-family:Times New Roman;font-size:10pt;' > 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 </font><font style='font-family:Times New Roman;font-size:10pt;' >these criteria are met for each element and there is 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 ma</font><font style='font-family:Times New Roman;font-size:10pt;' >y be cases, however, in which there is VSOE of fair 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 amoun</font><font style='font-family:Times New Roman;font-size:10pt;' >t of consideration allocated to the delivered item(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;line-height:12pt;' ><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;line-height:12pt;' ><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 deliverabl</font><font style='font-family:Times New Roman;font-size:10pt;' >e that is subject to the existing software revenue 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 d</font><font style='font-family:Times New Roman;font-size:10pt;' >eliverables in the arrangement using the hierarchy: VSOE, third-party evidence (TPE) or best estimate of </font><font style='font-family:Times New Roman;font-size:10pt;' >selling price (BESP). In circumstances where the company cannot determine VSOE or TPE of the selling price for all of the deliverables in the arrangeme</font><font style='font-family:Times New Roman;font-size:10pt;' >nt, including the software deliverable, BESP is used for the purpose of performing this allocation.</font></p></div>
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CY2014Q4	us-gaap	Liability For Uncertain Tax Positions Noncurrent LiabilityForUncertainTaxPositionsNoncurrent	3146000000	USD
CY2015Q4	ibm	Defined Contribution Pension Plan Liabilities Noncurrent DefinedContributionPensionPlanLiabilitiesNoncurrent	1445000000	USD
CY2014Q4	ibm	Defined Contribution Pension Plan Liabilities Noncurrent DefinedContributionPensionPlanLiabilitiesNoncurrent	1658000000	USD
CY2015Q4	us-gaap	Supplemental Unemployment Benefits Disability Related Benefits SupplementalUnemploymentBenefitsDisabilityRelatedBenefits	590000000	USD
CY2014Q4	us-gaap	Supplemental Unemployment Benefits Disability Related Benefits SupplementalUnemploymentBenefitsDisabilityRelatedBenefits	675000000	USD
CY2015Q4	us-gaap	Derivative Liabilities Noncurrent DerivativeLiabilitiesNoncurrent	22000000	USD
CY2014Q4	us-gaap	Derivative Liabilities Noncurrent DerivativeLiabilitiesNoncurrent	31000000	USD
CY2015Q4	ibm	Workforce Reductions Noncurrent WorkforceReductionsNoncurrent	407000000	USD
CY2014Q4	ibm	Workforce Reductions Noncurrent WorkforceReductionsNoncurrent	469000000	USD
CY2015Q4	us-gaap	Deferred Tax Liabilities Noncurrent DeferredTaxLiabilitiesNoncurrent	253000000	USD
CY2014Q4	us-gaap	Deferred Tax Liabilities Noncurrent DeferredTaxLiabilitiesNoncurrent	129000000	USD
CY2015Q4	us-gaap	Accrued Environmental Loss Contingencies Noncurrent AccruedEnvironmentalLossContingenciesNoncurrent	270000000	USD
CY2014Q4	us-gaap	Accrued Environmental Loss Contingencies Noncurrent AccruedEnvironmentalLossContingenciesNoncurrent	240000000	USD
CY2014Q4	us-gaap	Product Warranty Accrual Noncurrent ProductWarrantyAccrualNoncurrent	91000000	USD
CY2015Q4	us-gaap	Asset Retirement Obligations Noncurrent AssetRetirementObligationsNoncurrent	134000000	USD
CY2014Q4	us-gaap	Asset Retirement Obligations Noncurrent AssetRetirementObligationsNoncurrent	136000000	USD
CY2015Q4	us-gaap	Other Sundry Liabilities Noncurrent OtherSundryLiabilitiesNoncurrent	519000000	USD
CY2014Q4	us-gaap	Other Sundry Liabilities Noncurrent OtherSundryLiabilitiesNoncurrent	536000000	USD
CY2015Q4	ibm	Deferred Services Transition And Setup Costs DeferredServicesTransitionAndSetupCosts	2144000000	USD
CY2014Q4	ibm	Deferred Services Transition And Setup Costs DeferredServicesTransitionAndSetupCosts	2230000000	USD
CY2015	ibm	Future Amortization Expense Of Deferred Services Transition And Setup Costs Year One FutureAmortizationExpenseOfDeferredServicesTransitionAndSetupCostsYearOne	653000000	USD
CY2015	ibm	Future Amortization Expense Of Deferred Services Transition And Setup Costs Year Two FutureAmortizationExpenseOfDeferredServicesTransitionAndSetupCostsYearTwo	522000000	USD
CY2015	ibm	Future Amortization Expense Of Deferred Services Transition And Setup Costs Year Three FutureAmortizationExpenseOfDeferredServicesTransitionAndSetupCostsYearThree	366000000	USD
CY2015	ibm	Future Amortization Expense Of Deferred Services Transition And Setup Costs Year Four FutureAmortizationExpenseOfDeferredServicesTransitionAndSetupCostsYearFour	254000000	USD
CY2013Q4	us-gaap	Sharebased Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Outstanding Options Weighted Average Exercise Price Beginning Balance1 SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1	97
CY2014Q4	us-gaap	Sharebased Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Outstanding Options Weighted Average Exercise Price Beginning Balance1 SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1	97
CY2012Q4	us-gaap	Sharebased Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Outstanding Options Weighted Average Exercise Price Beginning Balance1 SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1	94
CY2012Q4	us-gaap	Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Number Of Outstanding Options ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions	11389721	shares
CY2013Q4	us-gaap	Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Number Of Outstanding Options ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions	5622951	shares
CY2014Q4	us-gaap	Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Number Of Outstanding Options ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions	1750949	shares
CY2013Q4	us-gaap	Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Number Of Exercisable Options ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions	5622951	shares
CY2014Q4	us-gaap	Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Number Of Exercisable Options ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions	1750949	shares
CY2015Q4	us-gaap	Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Number Of Outstanding Options ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions	479774	shares
CY2015Q4	us-gaap	Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Number Of Exercisable Options ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions	479774	shares
CY2014	us-gaap	Derivative Gain Loss On Derivative Net DerivativeGainLossOnDerivativeNet	-263000000	USD
CY2013	us-gaap	Derivative Gain Loss On Derivative Net DerivativeGainLossOnDerivativeNet	-347000000	USD
CY2014	us-gaap	Change In Unrealized Gain Loss On Hedged Item In Fair Value Hedge1 ChangeInUnrealizedGainLossOnHedgedItemInFairValueHedge1	-241000000	USD
CY2013	us-gaap	Change In Unrealized Gain Loss On Hedged Item In Fair Value Hedge1 ChangeInUnrealizedGainLossOnHedgedItemInFairValueHedge1	340000000	USD
CY2015	ibm	Future Amortization Expense Of Deferred Services Transition And Setup Costs Thereafter FutureAmortizationExpenseOfDeferredServicesTransitionAndSetupCostsThereafter	349000000	USD
CY2015	ibm	Deferred Payments In Excess Of Fair Value Of Acquired Assets DeferredPaymentsInExcessOfFairValueOfAcquiredAssets	184000000	USD
CY2015	ibm	Future Amortization Expense Of Payments In Excess Of Fair Value Of Acquired Assets Year Two FutureAmortizationExpenseOfPaymentsInExcessOfFairValueOfAcquiredAssetsYearTwo	41000000	USD
CY2015	ibm	Future Amortization Expense Of Payments In Excess Of Fair Value Of Acquired Assets Year Three FutureAmortizationExpenseOfPaymentsInExcessOfFairValueOfAcquiredAssetsYearThree	39000000	USD
CY2015	us-gaap	Marketing And Advertising Expense MarketingAndAdvertisingExpense	1290000000	USD
CY2014	us-gaap	Marketing And Advertising Expense MarketingAndAdvertisingExpense	1307000000	USD
CY2013	us-gaap	Marketing And Advertising Expense MarketingAndAdvertisingExpense	1294000000	USD
CY2015	ibm	Minimum Percentage Of Tax Positions Expected To Be Realized Upon Settlement MinimumPercentageOfTaxPositionsExpectedToBeRealizedUponSettlement	0.5	pure
CY2015	ibm	Maturity Period Of Derivatives Used In Determining Its Nature MaturityPeriodOfDerivativesUsedInDeterminingItsNature	P12M
CY2015	ibm	Realization Period For Debt Securities Classified As Current Assets RealizationPeriodForDebtSecuritiesClassifiedAsCurrentAssets	P1Y
CY2015	ibm	Days After Which Receivables Considered Past Due DaysAfterWhichReceivablesConsideredPastDue	P90D
CY2015Q4	us-gaap	Sharebased Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Outstanding Options Weighted Average Exercise Price Beginning Balance1 SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1	94
CY2015Q4	us-gaap	Sharebased Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Exercisable Options Weighted Average Exercise Price1 SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1	94
CY2014Q4	us-gaap	Sharebased Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Exercisable Options Weighted Average Exercise Price1 SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1	97
CY2013Q4	us-gaap	Sharebased Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Exercisable Options Weighted Average Exercise Price1 SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1	97
CY2015Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Outstanding Aggregate Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue	20973745	USD
CY2015	us-gaap	Sharebased Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Outstanding Options Weighted Average Remaining Contractual Term2 SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageRemainingContractualTerm2	P11M
CY2015Q4	us-gaap	Derivative Net Liability Position Aggregate Fair Value DerivativeNetLiabilityPositionAggregateFairValue	28000000	USD
CY2015Q4	ibm	Derivative Net Asset Position Aggregate Fair Value DerivativeNetAssetPositionAggregateFairValue	994000000	USD
CY2014Q4	ibm	Derivative Net Asset Position Aggregate Fair Value DerivativeNetAssetPositionAggregateFairValue	1432000000	USD
CY2015Q4	us-gaap	Collateral Already Posted Aggregate Fair Value CollateralAlreadyPostedAggregateFairValue	0	USD
CY2014Q4	us-gaap	Collateral Already Posted Aggregate Fair Value CollateralAlreadyPostedAggregateFairValue	0	USD
CY2015Q4	ibm	Cash Collateral Rehypothecated CashCollateralRehypothecated	0	USD
CY2014Q4	ibm	Cash Collateral Rehypothecated CashCollateralRehypothecated	0	USD
CY2015Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	965728725	shares
CY2015Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	150000000	shares
CY2015Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.01
CY2015Q4	ibm	Treasury Stocks Acquired Repurchase Authorization TreasuryStocksAcquiredRepurchaseAuthorization	5563000000	USD
CY2014	us-gaap	Derivative Instruments Gain Loss Recognized In Other Comprehensive Income Effective Portion Net DerivativeInstrumentsGainLossRecognizedInOtherComprehensiveIncomeEffectivePortionNet	2095000000	USD
CY2014	us-gaap	Derivative Instruments Gain Loss Reclassified From Accumulated Oci Into Income Effective Portion Net DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet	97000000	USD
CY2014	us-gaap	Derivative Instruments Gain Loss Recognized In Income Ineffective Portion And Amount Excluded From Effectiveness Testing Net DerivativeInstrumentsGainLossRecognizedInIncomeIneffectivePortionAndAmountExcludedFromEffectivenessTestingNet	-1000000	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
CY2015	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	62000000	USD
CY2015	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	141000000	USD
CY2015	ibm	Financing Receivable Allowance For Credit Losses Other FinancingReceivableAllowanceForCreditLossesOther	51000000	USD
CY2014Q4	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	353000000	USD
CY2014Q4	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	340000000	USD
CY2014	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	276000000	USD
CY2014	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	0	USD
CY2014	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	-3000000	USD
CY2014Q4	us-gaap	Loans And Leases Receivable Collateral For Secured Borrowings LoansAndLeasesReceivableCollateralForSecuredBorrowings	642000000	USD
CY2015Q4	us-gaap	Loans And Leases Receivable Collateral For Secured Borrowings LoansAndLeasesReceivableCollateralForSecuredBorrowings	545000000	USD
CY2013	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	1384000000	USD
CY2013	us-gaap	Pension And Other Postretirement Benefit Expense PensionAndOtherPostretirementBenefitExpense	2876000000	USD
CY2015	us-gaap	Pension And Other Postretirement Benefit Expense PensionAndOtherPostretirementBenefitExpense	2572000000	USD
CY2014	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	1253000000	USD
CY2014	us-gaap	Pension And Other Postretirement Benefit Expense PensionAndOtherPostretirementBenefitExpense	1974000000	USD
CY2015	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	1138000000	USD
CY2015Q4	ibm	Defined Benefit Plan Plans With Plan Assets In Excess Of Benefit Obligation Funded Status DefinedBenefitPlanPlansWithPlanAssetsInExcessOfBenefitObligationFundedStatus	1734000000	USD
CY2015Q4	ibm	Defined Benefit Plan Plans With Benefit Obligations In Excess Of Plan Assets Funded Status DefinedBenefitPlanPlansWithBenefitObligationsInExcessOfPlanAssetsFundedStatus	17247000000	USD
CY2014Q4	ibm	Defined Benefit Plan Plans With Plan Assets In Excess Of Benefit Obligation Funded Status DefinedBenefitPlanPlansWithPlanAssetsInExcessOfBenefitObligationFundedStatus	2159000000	USD
CY2014Q4	ibm	Defined Benefit Plan Plans With Benefit Obligations In Excess Of Plan Assets Funded Status DefinedBenefitPlanPlansWithBenefitObligationsInExcessOfPlanAssetsFundedStatus	19091000000	USD
CY2015	us-gaap	Net Cash Provided By Used In Operating Activities Continuing Operations NetCashProvidedByUsedInOperatingActivitiesContinuingOperations	17008000000	USD
CY2014	us-gaap	Net Cash Provided By Used In Operating Activities Continuing Operations NetCashProvidedByUsedInOperatingActivitiesContinuingOperations	16868000000	USD
CY2013	us-gaap	Net Cash Provided By Used In Operating Activities Continuing Operations NetCashProvidedByUsedInOperatingActivitiesContinuingOperations	17485000000	USD
CY2014	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	13395000000	USD
CY2015	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	4701000000	USD
CY2015	ibm	Common Stock Issued Under Employee Plan Shares CommonStockIssuedUnderEmployeePlanShares	6013875	shares
CY2014	ibm	Common Stock Issued Under Employee Plan Shares CommonStockIssuedUnderEmployeePlanShares	7687026	shares
CY2013	ibm	Common Stock Issued Under Employee Plan Shares CommonStockIssuedUnderEmployeePlanShares	9961389	shares
CY2015	ibm	Purchases Treasury Stock Under Employee Plans Shares PurchasesTreasuryStockUnderEmployeePlansShares	1625820	shares
CY2014	ibm	Purchases Treasury Stock Under Employee Plans Shares PurchasesTreasuryStockUnderEmployeePlansShares	1313569	shares
CY2013	ibm	Purchases Treasury Stock Under Employee Plans Shares PurchasesTreasuryStockUnderEmployeePlansShares	1666069	shares
CY2015	ibm	Sales Treasury Stock Under Employee Plans Shares SalesTreasuryStockUnderEmployeePlansShares	1155558	shares
CY2014	ibm	Sales Treasury Stock Under Employee Plans Shares SalesTreasuryStockUnderEmployeePlansShares	1264232	shares
CY2013	ibm	Sales Treasury Stock Under Employee Plans Shares SalesTreasuryStockUnderEmployeePlansShares	1849883	shares
CY2015	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	30338647	shares
CY2014	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	71504867	shares
CY2013	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	73121942	shares
CY2015	ibm	Unrecognized Tax Benefits Offsets UnrecognizedTaxBenefitsOffsets	850000000	USD
CY2014Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	593000000	USD
CY2014	ibm	Deferred Payments In Excess Of Fair Value Of Acquired Assets DeferredPaymentsInExcessOfFairValueOfAcquiredAssets	64000000	USD
CY2013Q4	us-gaap	Standard Product Warranty Accrual StandardProductWarrantyAccrual	376000000	USD
CY2014	us-gaap	Standard Product Warranty Accrual Warranties Issued StandardProductWarrantyAccrualWarrantiesIssued	240000000	USD
CY2014	us-gaap	Standard Product Warranty Accrual Preexisting Increase Decrease StandardProductWarrantyAccrualPreexistingIncreaseDecrease	-120000000	USD
CY2014	us-gaap	Standard Product Warranty Accrual Payments StandardProductWarrantyAccrualPayments	298000000	USD
CY2014Q4	us-gaap	Standard Product Warranty Accrual StandardProductWarrantyAccrual	197000000	USD
CY2015	us-gaap	Standard Product Warranty Accrual Warranties Issued StandardProductWarrantyAccrualWarrantiesIssued	173000000	USD
CY2015	us-gaap	Standard Product Warranty Accrual Preexisting Increase Decrease StandardProductWarrantyAccrualPreexistingIncreaseDecrease	7000000	USD
CY2015	us-gaap	Standard Product Warranty Accrual Payments StandardProductWarrantyAccrualPayments	196000000	USD
CY2015Q4	us-gaap	Standard Product Warranty Accrual StandardProductWarrantyAccrual	181000000	USD
CY2015Q4	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	38820000000	USD
CY2014Q4	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	39737000000	USD
CY2015	ibm	Derivative Credit Risk Related Contingent Features Triggering Circumstances Basis Point Spread DerivativeCreditRiskRelatedContingentFeaturesTriggeringCircumstancesBasisPointSpread	0.025	pure
CY2015	us-gaap	Impairment Of Intangible Assets Excluding Goodwill ImpairmentOfIntangibleAssetsExcludingGoodwill	0	USD
CY2014	us-gaap	Impairment Of Intangible Assets Excluding Goodwill ImpairmentOfIntangibleAssetsExcludingGoodwill	0	USD
CY2015	ibm	Common Stock Issued Under Employee Plan Stock Option Exercises Acquired And Non Us Employees CommonStockIssuedUnderEmployeePlanStockOptionExercisesAcquiredAndNonUSEmployees	1155558	shares
CY2013	ibm	Common Stock Issued Under Employee Plan Stock Option Exercises Acquired And Non Us Employees CommonStockIssuedUnderEmployeePlanStockOptionExercisesAcquiredAndNonUSEmployees	1849883	shares
CY2014	ibm	Common Stock Issued Under Employee Plan Stock Option Exercises Acquired And Non Us Employees CommonStockIssuedUnderEmployeePlanStockOptionExercisesAcquiredAndNonUSEmployees	1264232	shares
CY2015	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	3037001	shares
CY2015	us-gaap	Incremental Common Shares Attributable To Contingently Issuable Shares IncrementalCommonSharesAttributableToContingentlyIssuableShares	918744	shares
CY2015	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	13190000000	USD
CY2015	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	13189000000	USD
CY2014Q4	us-gaap	Derivative Net Liability Position Aggregate Fair Value DerivativeNetLiabilityPositionAggregateFairValue	21000000	USD
CY2015	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	2657000000	USD
CY2015	us-gaap	Interest Paid Net InterestPaidNet	995000000	USD
CY2015	us-gaap	Capital Lease Obligations Incurred CapitalLeaseObligationsIncurred	4000000	USD
CY2014	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	5748000000	USD
CY2013	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	4024000000	USD
CY2014	us-gaap	Interest Paid Net InterestPaidNet	1061000000	USD
CY2013	us-gaap	Interest Paid Net InterestPaidNet	982000000	USD
CY2014	us-gaap	Capital Lease Obligations Incurred CapitalLeaseObligationsIncurred	2000000	USD
CY2013	us-gaap	Capital Lease Obligations Incurred CapitalLeaseObligationsIncurred	14000000	USD
CY2015	us-gaap	Proceeds From Issuance Of Long Term Debt And Capital Securities Net ProceedsFromIssuanceOfLongTermDebtAndCapitalSecuritiesNet	5540000000	USD
CY2015	us-gaap	Repayments Of Long Term Debt And Capital Securities RepaymentsOfLongTermDebtAndCapitalSecurities	5622000000	USD
CY2015	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	101000000	USD
CY2015	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	4609000000	USD
CY2015	us-gaap	Proceeds From Issuance Or Sale Of Equity ProceedsFromIssuanceOrSaleOfEquity	322000000	USD
CY2015	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	4897000000	USD
CY2015	us-gaap	Net Cash Provided By Used In Financing Activities Continuing Operations NetCashProvidedByUsedInFinancingActivitiesContinuingOperations	-9166000000	USD
CY2015	us-gaap	Effect Of Exchange Rate On Cash And Cash Equivalents Continuing Operations EffectOfExchangeRateOnCashAndCashEquivalentsContinuingOperations	-473000000	USD
CY2014	us-gaap	Effect Of Exchange Rate On Cash And Cash Equivalents Continuing Operations EffectOfExchangeRateOnCashAndCashEquivalentsContinuingOperations	-655000000	USD
CY2013	us-gaap	Effect Of Exchange Rate On Cash And Cash Equivalents Continuing Operations EffectOfExchangeRateOnCashAndCashEquivalentsContinuingOperations	28000000	USD
CY2014	us-gaap	Proceeds From Issuance Of Long Term Debt And Capital Securities Net ProceedsFromIssuanceOfLongTermDebtAndCapitalSecuritiesNet	8180000000	USD
CY2013	us-gaap	Proceeds From Issuance Of Long Term Debt And Capital Securities Net ProceedsFromIssuanceOfLongTermDebtAndCapitalSecuritiesNet	16353000000	USD
CY2014	us-gaap	Repayments Of Long Term Debt And Capital Securities RepaymentsOfLongTermDebtAndCapitalSecurities	4644000000	USD
CY2013	us-gaap	Repayments Of Long Term Debt And Capital Securities RepaymentsOfLongTermDebtAndCapitalSecurities	10013000000	USD
CY2014	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	-1753000000	USD
CY2013	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	621000000	USD
CY2014	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	13679000000	USD
CY2013	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	13859000000	USD
CY2014	us-gaap	Proceeds From Issuance Or Sale Of Equity ProceedsFromIssuanceOrSaleOfEquity	709000000	USD
CY2013	us-gaap	Proceeds From Issuance Or Sale Of Equity ProceedsFromIssuanceOrSaleOfEquity	1074000000	USD
CY2014	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	4265000000	USD
CY2013	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	4058000000	USD
CY2014	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	656000000	USD
CY2013	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	3056000000	USD
CY2015	us-gaap	Net Cash Provided By Used In Investing Activities Continuing Operations NetCashProvidedByUsedInInvestingActivitiesContinuingOperations	-8159000000	USD
CY2014	us-gaap	Net Cash Provided By Used In Investing Activities Continuing Operations NetCashProvidedByUsedInInvestingActivitiesContinuingOperations	-3001000000	USD
CY2013	us-gaap	Net Cash Provided By Used In Investing Activities Continuing Operations NetCashProvidedByUsedInInvestingActivitiesContinuingOperations	-7326000000	USD
CY2015	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	-812000000	USD
CY2014	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	-1270000000	USD
CY2013	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	1407000000	USD
CY2015	ibm	Increase Decrease In Retirement Related Assets And Liabilities IncreaseDecreaseInRetirementRelatedAssetsAndLiabilities	22000000	USD
CY2014	ibm	Increase Decrease In Retirement Related Assets And Liabilities IncreaseDecreaseInRetirementRelatedAssetsAndLiabilities	655000000	USD
CY2014	us-gaap	Net Cash Provided By Used In Financing Activities Continuing Operations NetCashProvidedByUsedInFinancingActivitiesContinuingOperations	-15452000000	USD
CY2013	us-gaap	Net Cash Provided By Used In Financing Activities Continuing Operations NetCashProvidedByUsedInFinancingActivitiesContinuingOperations	-9883000000	USD
CY2015	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	3579000000	USD
CY2014	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	3740000000	USD
CY2013	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	3623000000	USD
CY2015	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	370000000	USD
CY2014	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	404000000	USD
CY2013	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	372000000	USD
CY2015	us-gaap	Payments To Acquire Software PaymentsToAcquireSoftware	572000000	USD
CY2014	us-gaap	Payments To Acquire Software PaymentsToAcquireSoftware	443000000	USD
CY2013	us-gaap	Payments To Acquire Software PaymentsToAcquireSoftware	517000000	USD
CY2015	us-gaap	Payments To Acquire Investments PaymentsToAcquireInvestments	3073000000	USD
CY2014	us-gaap	Payments To Acquire Investments PaymentsToAcquireInvestments	2338000000	USD
CY2013	us-gaap	Payments To Acquire Investments PaymentsToAcquireInvestments	4608000000	USD
CY2015	us-gaap	Proceeds From Sale Maturity And Collections Of Investments ProceedsFromSaleMaturityAndCollectionsOfInvestments	2842000000	USD
CY2014	us-gaap	Proceeds From Sale Maturity And Collections Of Investments ProceedsFromSaleMaturityAndCollectionsOfInvestments	2493000000	USD
CY2013	us-gaap	Proceeds From Sale Maturity And Collections Of Investments ProceedsFromSaleMaturityAndCollectionsOfInvestments	4873000000	USD
CY2015	ibm	Non Operating Finance Receivables Net NonOperatingFinanceReceivablesNet	-398000000	USD
CY2014	ibm	Non Operating Finance Receivables Net NonOperatingFinanceReceivablesNet	-1078000000	USD
CY2013	ibm	Non Operating Finance Receivables Net NonOperatingFinanceReceivablesNet	-1063000000	USD
CY2015	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	3349000000	USD
CY2013	ibm	Increase Decrease In Retirement Related Assets And Liabilities IncreaseDecreaseInRetirementRelatedAssetsAndLiabilities	-294000000	USD
CY2015	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-133000000	USD
CY2014	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	39000000	USD
CY2013	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	57000000	USD
CY2015	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	3448000000	USD
CY2014	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	1886000000	USD
CY2013	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	747000000	USD
CY2015	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	81000000	USD
CY2014	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-456000000	USD
CY2013	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-529000000	USD
CY2015	us-gaap	Depreciation Depreciation	2662000000	USD
CY2014	us-gaap	Depreciation Depreciation	3145000000	USD
CY2013	us-gaap	Depreciation Depreciation	3327000000	USD
CY2015	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	1193000000	USD
CY2014	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	1347000000	USD
CY2013	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	1351000000	USD
CY2015	us-gaap	Share Based Compensation ShareBasedCompensation	468000000	USD
CY2014	us-gaap	Share Based Compensation ShareBasedCompensation	512000000	USD
CY2013	us-gaap	Share Based Compensation ShareBasedCompensation	614000000	USD
CY2015	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	1387000000	USD
CY2014	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-237000000	USD
CY2013	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-1610000000	USD
CY2015	us-gaap	Gain Loss On Sale Of Other Assets GainLossOnSaleOfOtherAssets	-481000000	USD
CY2014	us-gaap	Gain Loss On Sale Of Other Assets GainLossOnSaleOfOtherAssets	1535000000	USD
CY2013	us-gaap	Gain Loss On Sale Of Other Assets GainLossOnSaleOfOtherAssets	236000000	USD
CY2015Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	5271000000	USD
CY2014	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	12022000000	USD
CY2013	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	16483000000	USD
CY2014	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	12020000000	USD
CY2013	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	16483000000	USD
CY2014	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	4332155	shares
CY2013	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	6751240	shares
CY2014	us-gaap	Incremental Common Shares Attributable To Contingently Issuable Shares IncrementalCommonSharesAttributableToContingentlyIssuableShares	1395741	shares
CY2013	us-gaap	Incremental Common Shares Attributable To Contingently Issuable Shares IncrementalCommonSharesAttributableToContingentlyIssuableShares	1804313	shares
CY2013	us-gaap	Available For Sale Securities Gross Realized Losses AvailableForSaleSecuritiesGrossRealizedLosses	5000000	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	ibm	Common Stock Issued Under Employee Plan Value CommonStockIssuedUnderEmployeePlanValue	1216000000	USD
CY2013	ibm	Purchases Sales Treasury Stock Under Employee Plans Net PurchasesSalesTreasuryStockUnderEmployeePlansNet	-142000000	USD
CY2013	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	13993000000	USD
CY2013	us-gaap	Stockholders Equity Other StockholdersEquityOther	-268000000	USD
CY2013	us-gaap	Minority Interest Period Increase Decrease MinorityInterestPeriodIncreaseDecrease	13000000	USD
CY2012Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	10412000000	USD
CY2013Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	10716000000	USD
CY2015Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	7686000000	USD
CY2015	ibm	Purchases Treasury Stock Under Employee Plans Value PurchasesTreasuryStockUnderEmployeePlansValue	248000000	USD
CY2013	ibm	Purchases Treasury Stock Under Employee Plans Value PurchasesTreasuryStockUnderEmployeePlansValue	336000000	USD
CY2014	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	-11000000	USD
CY2013	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	-2000000	USD
CY2013	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	3144000000	USD
CY2015	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	208000000	USD
CY2014	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	-1883000000	USD
CY2015	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-1731000000	USD
CY2014	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-6274000000	USD
CY2013	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	4157000000	USD
CY2015	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	11459000000	USD
CY2014	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	5748000000	USD
CY2013	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	20641000000	USD
CY2015	us-gaap	Other Comprehensive Income Defined Benefit Plan Net Prior Service Cost Credit Arising During Period Before Tax OtherComprehensiveIncomeDefinedBenefitPlanNetPriorServiceCostCreditArisingDuringPeriodBeforeTax	-6000000	USD
CY2015Q4	ibm	Business Acquisition Accrued Payment BusinessAcquisitionAccruedPayment	200000000	USD
CY2014Q4	ibm	Business Acquisition Accrued Payment BusinessAcquisitionAccruedPayment	50000000	USD
CY2015Q4	us-gaap	Goodwill Goodwill	32021000000	USD
CY2015Q4	us-gaap	Restructuring Reserve Noncurrent RestructuringReserveNoncurrent	362000000	USD
CY2014Q4	us-gaap	Restructuring Reserve Noncurrent RestructuringReserveNoncurrent	431000000	USD
CY2015Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	8099000000	USD
CY2014Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	8733000000	USD
CY2015	ibm	Intangible Assets Fully Amortized Retired IntangibleAssetsFullyAmortizedRetired	1809000000	USD
CY2013	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	5000000	USD
CY2014Q4	us-gaap	Long Term Debt Fair Value LongTermDebtFairValue	37524000000	USD
CY2015Q4	us-gaap	Long Term Debt Fair Value LongTermDebtFairValue	35220000000	USD
CY2015Q4	us-gaap	Inventory Finished Goods Net Of Reserves InventoryFinishedGoodsNetOfReserves	352000000	USD
CY2015Q4	us-gaap	Inventory Work In Process And Raw Materials Net Of Reserves InventoryWorkInProcessAndRawMaterialsNetOfReserves	1199000000	USD
CY2014Q4	us-gaap	Inventory Finished Goods Net Of Reserves InventoryFinishedGoodsNetOfReserves	430000000	USD
CY2014Q4	us-gaap	Inventory Work In Process And Raw Materials Net Of Reserves InventoryWorkInProcessAndRawMaterialsNetOfReserves	1674000000	USD
CY2015	us-gaap	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	1117000000	USD
CY2014	us-gaap	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	1239000000	USD
CY2015	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	540000000	USD
CY2014	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	542000000	USD
CY2013	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	587000000	USD
CY2015	us-gaap	Interest Expense Debt Excluding Amortization InterestExpenseDebtExcludingAmortization	481000000	USD
CY2014	us-gaap	Interest Expense Debt Excluding Amortization InterestExpenseDebtExcludingAmortization	484000000	USD
CY2013	us-gaap	Interest Expense Debt Excluding Amortization InterestExpenseDebtExcludingAmortization	405000000	USD
CY2015	ibm	Interest On Investment Derivative Activity InterestOnInvestmentDerivativeActivity	-13000000	USD
CY2014	ibm	Interest On Investment Derivative Activity InterestOnInvestmentDerivativeActivity	0	USD
CY2013	ibm	Interest On Investment Derivative Activity InterestOnInvestmentDerivativeActivity	-3000000	USD
CY2015	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	0	USD
CY2014	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	4000000	USD
CY2013	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	22000000	USD
CY2015	us-gaap	Interest Costs Incurred InterestCostsIncurred	1008000000	USD
CY2014	us-gaap	Interest Costs Incurred InterestCostsIncurred	1030000000	USD
CY2013	us-gaap	Interest Costs Incurred InterestCostsIncurred	1011000000	USD
CY2015Q4	ibm	Other Taxes Payable OtherTaxesPayable	89000000	USD
CY2014Q4	ibm	Other Taxes Payable OtherTaxesPayable	17000000	USD
CY2015Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	4574000000	USD
CY2015Q4	us-gaap	Undistributed Earnings Of Foreign Subsidiaries UndistributedEarningsOfForeignSubsidiaries	68100000000	USD
CY2015Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	3724000000	USD
CY2014Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	4229000000	USD
CY2013Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	3902000000	USD
CY2015	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Expense UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense	141000000	USD
CY2015Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	613000000	USD
CY2015	us-gaap	Unrecognized Tax Benefits Period Increase Decrease UnrecognizedTaxBenefitsPeriodIncreaseDecrease	-530000000	USD
CY2015Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards DeferredTaxAssetsTaxCreditCarryforwards	1149000000	USD
CY2015Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Postretirement Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPostretirementBenefits	4621000000	USD
CY2014Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Postretirement Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPostretirementBenefits	4795000000	USD
CY2015Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	963000000	USD
CY2014Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	1328000000	USD
CY2014Q4	ibm	Deferred Tax Assets Operating Loss Carryforwards And Tax Credit Carryforwards Domestic DeferredTaxAssetsOperatingLossCarryforwardsAndTaxCreditCarryforwardsDomestic	858000000	USD
CY2015Q4	us-gaap	Deferred Tax Assets Deferred Income DeferredTaxAssetsDeferredIncome	762000000	USD
CY2014Q4	us-gaap	Deferred Tax Assets Deferred Income DeferredTaxAssetsDeferredIncome	957000000	USD
CY2015Q4	ibm	Deferred Tax Assets Operating Loss Carryforwards And Tax Credit Carryforwards Foreign DeferredTaxAssetsOperatingLossCarryforwardsAndTaxCreditCarryforwardsForeign	825000000	USD
CY2014Q4	ibm	Deferred Tax Assets Operating Loss Carryforwards And Tax Credit Carryforwards Foreign DeferredTaxAssetsOperatingLossCarryforwardsAndTaxCreditCarryforwardsForeign	686000000	USD
CY2015Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals	528000000	USD
CY2014Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals	529000000	USD
CY2015Q4	us-gaap	Deferred Tax Assets Property Plant And Equipment DeferredTaxAssetsPropertyPlantAndEquipment	329000000	USD
CY2014Q4	us-gaap	Deferred Tax Assets Property Plant And Equipment DeferredTaxAssetsPropertyPlantAndEquipment	329000000	USD
CY2015Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	931000000	USD
CY2014Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	1306000000	USD
CY2015Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	10929000000	USD
CY2014Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	11964000000	USD
CY2015Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	740000000	USD
CY2014Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	646000000	USD
CY2015Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	10189000000	USD
CY2015Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	919000000	USD
CY2014Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	487000000	USD
CY2015Q4	ibm	Deferred Tax Liabilities Tax Deferred Expense Compensation And Benefits Pension And Postretirement Benefits DeferredTaxLiabilitiesTaxDeferredExpenseCompensationAndBenefitsPensionAndPostretirementBenefits	252000000	USD
CY2014Q4	ibm	Deferred Tax Liabilities Tax Deferred Expense Compensation And Benefits Pension And Postretirement Benefits DeferredTaxLiabilitiesTaxDeferredExpenseCompensationAndBenefitsPensionAndPostretirementBenefits	205000000	USD
CY2015Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssets	1407000000	USD
CY2014Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssets	1263000000	USD
CY2015Q4	us-gaap	Deferred Tax Liabilities Leasing Arrangements DeferredTaxLiabilitiesLeasingArrangements	916000000	USD
CY2014Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	11318000000	USD
CY2014Q4	us-gaap	Deferred Tax Liabilities Leasing Arrangements DeferredTaxLiabilitiesLeasingArrangements	912000000	USD
CY2015Q4	us-gaap	Deferred Tax Liabilities Deferred Expense Capitalized Software DeferredTaxLiabilitiesDeferredExpenseCapitalizedSoftware	554000000	USD
CY2014Q4	us-gaap	Deferred Tax Liabilities Deferred Expense Capitalized Software DeferredTaxLiabilitiesDeferredExpenseCapitalizedSoftware	421000000	USD
CY2015Q4	ibm	Deferred Tax Liabilities Deferred Expense Transition Costs DeferredTaxLiabilitiesDeferredExpenseTransitionCosts	395000000	USD
CY2014Q4	ibm	Deferred Tax Liabilities Deferred Expense Transition Costs DeferredTaxLiabilitiesDeferredExpenseTransitionCosts	374000000	USD
CY2015Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	1177000000	USD
CY2014Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	1111000000	USD
CY2015Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	5620000000	USD
CY2014Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	4773000000	USD
CY2015	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.35	pure
CY2014	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.35	pure
CY2013	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.35	pure
CY2015	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.01	pure
CY2014	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.01	pure
CY2013	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0	pure
CY2015	ibm	Effective Income Tax Rate Reconciliation Domestic Incentives EffectiveIncomeTaxRateReconciliationDomesticIncentives	0.02	pure
CY2014	ibm	Effective Income Tax Rate Reconciliation Domestic Incentives EffectiveIncomeTaxRateReconciliationDomesticIncentives	0.02	pure
CY2013	ibm	Effective Income Tax Rate Reconciliation Domestic Incentives EffectiveIncomeTaxRateReconciliationDomesticIncentives	0.03	pure
CY2015	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	-0.01	pure
CY2014	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0.01	pure
CY2013	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	-0.02	pure
CY2015	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.16	pure
CY2014	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.21	pure
CY2013	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.17	pure
CY2015Q4	us-gaap	Number Of Countries In Which Entity Operates NumberOfCountriesInWhichEntityOperates	175	Country
CY2015	ibm	Default Provision On Credit Facility DefaultProvisionOnCreditFacility	500000000	USD
CY2015	us-gaap	Finite Lived Intangible Assets Period Increase Decrease FiniteLivedIntangibleAssetsPeriodIncreaseDecrease	383000000	USD
CY2014	us-gaap	Interest Expense InterestExpense	484000000	USD
CY2015Q4	us-gaap	Defined Benefit Plan Plans With Benefit Obligations In Excess Of Plan Assets Aggregate Benefit Obligation DefinedBenefitPlanPlansWithBenefitObligationsInExcessOfPlanAssetsAggregateBenefitObligation	35054000000	USD
CY2014Q4	us-gaap	Defined Benefit Plan Plans With Benefit Obligations In Excess Of Plan Assets Aggregate Benefit Obligation DefinedBenefitPlanPlansWithBenefitObligationsInExcessOfPlanAssetsAggregateBenefitObligation	40836000000	USD
CY2015Q4	us-gaap	Defined Benefit Plan Plans With Benefit Obligations In Excess Of Plan Assets Aggregate Fair Value Of Plan Assets DefinedBenefitPlanPlansWithBenefitObligationsInExcessOfPlanAssetsAggregateFairValueOfPlanAssets	17807000000	USD
CY2014Q4	us-gaap	Defined Benefit Plan Plans With Benefit Obligations In Excess Of Plan Assets Aggregate Fair Value Of Plan Assets DefinedBenefitPlanPlansWithBenefitObligationsInExcessOfPlanAssetsAggregateFairValueOfPlanAssets	21745000000	USD
CY2015Q4	ibm	Defined Benefit Plan Plans With Plan Assets In Excess Of Benefit Obligation Aggregate Benefit Obligation DefinedBenefitPlanPlansWithPlanAssetsInExcessOfBenefitObligationAggregateBenefitObligation	68053000000	USD
CY2014Q4	ibm	Defined Benefit Plan Plans With Plan Assets In Excess Of Benefit Obligation Aggregate Benefit Obligation DefinedBenefitPlanPlansWithPlanAssetsInExcessOfBenefitObligationAggregateBenefitObligation	71512000000	USD
CY2015Q4	ibm	Defined Benefit Plan Plans With Plan Assets In Excess Of Benefit Obligation Aggregate Fair Value Of Plan Assets DefinedBenefitPlanPlansWithPlanAssetsInExcessOfBenefitObligationAggregateFairValueOfPlanAssets	69786000000	USD
CY2014Q4	ibm	Defined Benefit Plan Plans With Plan Assets In Excess Of Benefit Obligation Aggregate Fair Value Of Plan Assets DefinedBenefitPlanPlansWithPlanAssetsInExcessOfBenefitObligationAggregateFairValueOfPlanAssets	73671000000	USD
CY2015	dei	Entity Central Index Key EntityCentralIndexKey	0000051143
CY2015	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
CY2015	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2015	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2015	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2015	dei	Document Period End Date DocumentPeriodEndDate	2015-12-31
CY2015	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2015
CY2015	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2015	dei	Trading Symbol TradingSymbol	IBM
CY2015	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	13364000000	USD
CY2014	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	15751000000	USD
CY2013	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	16881000000	USD
CY2014	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	-3729000000	USD
CY2013	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	-398000000	USD
CY2015	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	-174000000	USD
CY2015	us-gaap	Profit Loss ProfitLoss	13190000000	USD
CY2014	us-gaap	Profit Loss ProfitLoss	12022000000	USD
CY2013	us-gaap	Profit Loss ProfitLoss	16483000000	USD
CY2014	us-gaap	Other Comprehensive Income Defined Benefit Plan Net Prior Service Cost Credit Arising During Period Before Tax OtherComprehensiveIncomeDefinedBenefitPlanNetPriorServiceCostCreditArisingDuringPeriodBeforeTax	-1000000	USD
CY2014Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	8476000000	USD
CY2015	us-gaap	Discontinued Operation Gain Loss On Disposal Of Discontinued Operation Net Of Tax DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax	-71000000	USD
CY2015	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	-790000000	USD
CY2014	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	-2240000000	USD
CY2013	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	304000000	USD
CY2013Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	22929000000	USD
CY2015	us-gaap	Number Of Businesses Acquired NumberOfBusinessesAcquired	14	Acquisition
CY2015	us-gaap	Business Combination Consideration Transferred1 BusinessCombinationConsiderationTransferred1	3555000000	USD
CY2013	us-gaap	Number Of Businesses Acquired NumberOfBusinessesAcquired	10	Acquisition
CY2013	us-gaap	Business Combination Consideration Transferred1 BusinessCombinationConsiderationTransferred1	3219000000	USD
CY2015Q4	us-gaap	Derivative Liability Not Offset Policy Election Deduction DerivativeLiabilityNotOffsetPolicyElectionDeduction	139000000	USD
CY2015Q4	us-gaap	Derivative Assets DerivativeAssets	726000000	USD
CY2014Q4	us-gaap	Derivative Assets DerivativeAssets	817000000	USD
CY2015Q4	us-gaap	Derivative Liabilities DerivativeLiabilities	47000000	USD
CY2014Q4	us-gaap	Derivative Liabilities DerivativeLiabilities	99000000	USD
CY2015	us-gaap	Goodwill Translation Adjustments GoodwillTranslationAdjustments	-1096000000	USD
CY2014	us-gaap	Goodwill Translation Adjustments GoodwillTranslationAdjustments	-891000000	USD
CY2014	ibm	Purchases Treasury Stock Under Employee Plans Value PurchasesTreasuryStockUnderEmployeePlansValue	236000000	USD
CY2014	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	58000000	USD
CY2015	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	5
CY2015	us-gaap	Dilutive Securities DilutiveSecurities	-1000000	USD
CY2014	us-gaap	Dilutive Securities DilutiveSecurities	-3000000	USD
CY2013	us-gaap	Dilutive Securities DilutiveSecurities	-1000000	USD
CY2014Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	5104000000	USD
CY2013Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	4458000000	USD
CY2013Q4	us-gaap	Goodwill Goodwill	31184000000	USD
CY2014	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Benefit Plan Improvement Tax Effect OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansBenefitPlanImprovementTaxEffect	0	USD
CY2014	us-gaap	Other Comprehensive Income Defined Benefit Plan Net Prior Service Costs Credit Arising During Period Net Of Tax OtherComprehensiveIncomeDefinedBenefitPlanNetPriorServiceCostsCreditArisingDuringPeriodNetOfTax	-1000000	USD
CY2013Q4	us-gaap	Assets Assets	125641000000	USD
CY2015	ibm	Net Income Loss From Continuing Operations Available To Common Stockholders Diluted NetIncomeLossFromContinuingOperationsAvailableToCommonStockholdersDiluted	13363000000	USD
CY2014	ibm	Net Income Loss From Continuing Operations Available To Common Stockholders Diluted NetIncomeLossFromContinuingOperationsAvailableToCommonStockholdersDiluted	15749000000	USD
CY2013	ibm	Net Income Loss From Continuing Operations Available To Common Stockholders Diluted NetIncomeLossFromContinuingOperationsAvailableToCommonStockholdersDiluted	16880000000	USD
CY2014Q4	us-gaap	Goodwill Goodwill	30556000000	USD
CY2013	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	8797	shares
CY2015	ibm	Defined Contribution Plans Estimated Future Employer Contributions In Next Fiscal Year DefinedContributionPlansEstimatedFutureEmployerContributionsInNextFiscalYear	1100000000	USD
CY2015	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	2581000000	USD
CY2015	ibm	Future Amortization Expense Of Payments In Excess Of Fair Value Of Acquired Assets Year One FutureAmortizationExpenseOfPaymentsInExcessOfFairValueOfAcquiredAssetsYearOne	53000000	USD
CY2015	ibm	Future Amortization Expense Of Payments In Excess Of Fair Value Of Acquired Assets Year Four FutureAmortizationExpenseOfPaymentsInExcessOfFairValueOfAcquiredAssetsYearFour	21000000	USD
CY2015	ibm	Future Amortization Expense Of Payments In Excess Of Fair Value Of Acquired Assets Thereafter FutureAmortizationExpenseOfPaymentsInExcessOfFairValueOfAcquiredAssetsThereafter	30000000	USD
CY2014Q4	us-gaap	Derivative Liability Not Offset Policy Election Deduction DerivativeLiabilityNotOffsetPolicyElectionDeduction	97000000	USD
CY2014	ibm	Intangible Assets Fully Amortized Retired IntangibleAssetsFullyAmortizedRetired	724000000	USD
CY2015	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	13.6
CY2014	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	15.59
CY2013	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	15.3
CY2015	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	-0.18
CY2014	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	-3.69
CY2013	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	-0.36
CY2015	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	13.42
CY2014	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	11.9
CY2013	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	14.94
CY2015	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	13.66
CY2014	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	15.68
CY2013	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	15.42
CY2015	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	-0.18
CY2014	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	-3.71
CY2013	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	-0.36
CY2015	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	13.48
CY2014	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	11.97
CY2013	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	15.06
CY2014	us-gaap	Effective Income Tax Rate Reconciliation Disposition Of Business EffectiveIncomeTaxRateReconciliationDispositionOfBusiness	0.009	pure
CY2015	ibm	Effective Income Tax Rate Reconciliation Favorable Geographic Mix Of Pre Tax Income EffectiveIncomeTaxRateReconciliationFavorableGeographicMixOfPreTaxIncome	-0.035	pure
CY2015	ibm	Increase Decrease In Continuing Operations Effective Income Tax Rate IncreaseDecreaseInContinuingOperationsEffectiveIncomeTaxRate	-0.05	pure
CY2015	us-gaap	Effective Income Tax Rate Reconciliation Tax Settlements Domestic EffectiveIncomeTaxRateReconciliationTaxSettlementsDomestic	-0.039	pure
CY2015	us-gaap	Effective Income Tax Rate Reconciliation Disposition Of Business EffectiveIncomeTaxRateReconciliationDispositionOfBusiness	0	pure
CY2013	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	1094486604	shares
CY2013	us-gaap	Other Comprehensive Income Defined Benefit Plan Net Prior Service Cost Credit Arising During Period Before Tax OtherComprehensiveIncomeDefinedBenefitPlanNetPriorServiceCostCreditArisingDuringPeriodBeforeTax	-16000000	USD
CY2015Q4	us-gaap	Inventory Net InventoryNet	1551000000	USD
CY2014Q4	us-gaap	Inventory Net InventoryNet	2103000000	USD
CY2014Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	12014000000	USD
CY2014	us-gaap	Discontinued Operation Gain Loss On Disposal Of Discontinued Operation Net Of Tax DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax	-3381000000	USD
CY2015	ibm	Financing Receivable Number Of Portfolio Segments FinancingReceivableNumberOfPortfolioSegments	2
CY2015	ibm	Financing Receivable Number Of Classes Of Financing Receiveble FinancingReceivableNumberOfClassesOfFinancingReceiveble	2	ClassOfFinancingReceivable
CY2015Q4	us-gaap	Fair Value Assets Level2 To Level1 Transfers Amount FairValueAssetsLevel2ToLevel1TransfersAmount	0	USD
CY2015Q4	us-gaap	Derivative Collateral Obligation To Return Cash DerivativeCollateralObligationToReturnCash	90000000	USD
CY2014Q4	us-gaap	Derivative Collateral Obligation To Return Cash DerivativeCollateralObligationToReturnCash	487000000	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 Plan Net Prior Service Costs Credit Arising During Period Net Of Tax OtherComprehensiveIncomeDefinedBenefitPlanNetPriorServiceCostsCreditArisingDuringPeriodNetOfTax	-16000000	USD
CY2015	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	41380	shares
CY2014	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	17420	shares
CY2013	ibm	Unrecognized Tax Benefits Income Tax Penalties And Interest Benefit UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestBenefit	93000000	USD
CY2014	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Expense UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense	216000000	USD
CY2014	us-gaap	Business Combination Consideration Transferred1 BusinessCombinationConsiderationTransferred1	608000000	USD
CY2014	us-gaap	Number Of Businesses Acquired NumberOfBusinessesAcquired	6	Acquisition
CY2015	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	-0.17	pure
CY2014	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	-0.14	pure
CY2013	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	-0.13	pure
CY2015	us-gaap	Gain Loss On Fair Value Hedge Ineffectiveness Net GainLossOnFairValueHedgeIneffectivenessNet	-2000000	USD
CY2015Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0	shares
CY2015	us-gaap	Sharebased Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Exercisable Options Weighted Average Remaining Contractual Term2 SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageRemainingContractualTerm2	P11M
CY2015Q4	ibm	Divestiture Related Acivities Noncurrent DivestitureRelatedAcivitiesNoncurrent	575000000	USD
CY2014Q4	ibm	Divestiture Related Acivities Noncurrent DivestitureRelatedAcivitiesNoncurrent	1124000000	USD
CY2015	us-gaap	Discontinued Operation Tax Effect Of Discontinued Operation DiscontinuedOperationTaxEffectOfDiscontinuedOperation	-117000000	USD
CY2014	us-gaap	Discontinued Operation Tax Effect Of Discontinued Operation DiscontinuedOperationTaxEffectOfDiscontinuedOperation	-1617000000	USD
CY2013	us-gaap	Discontinued Operation Tax Effect Of Discontinued Operation DiscontinuedOperationTaxEffectOfDiscontinuedOperation	-322000000	USD
CY2015Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Accrued Liabilities DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities	904000000	USD
CY2014Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Accrued Liabilities DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities	1176000000	USD
CY2015Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	3000000	USD
CY2015Q4	us-gaap	Available For Sale Equity Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleEquitySecuritiesAccumulatedGrossUnrealizedGainBeforeTax	6000000	USD
CY2015Q4	us-gaap	Available For Sale Equity Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleEquitySecuritiesAccumulatedGrossUnrealizedLossBeforeTax	0	USD
CY2014Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	3000000	USD
CY2014Q4	us-gaap	Available For Sale Equity Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleEquitySecuritiesAccumulatedGrossUnrealizedGainBeforeTax	2000000	USD
CY2014Q4	us-gaap	Available For Sale Equity Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleEquitySecuritiesAccumulatedGrossUnrealizedLossBeforeTax	31000000	USD
CY2015	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	982700267	shares
CY2014	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	1010000480	shares
CY2013	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	1103042156	shares
CY2015	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	978744523	shares
CY2014	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	1004272584	shares
CY2015Q4	us-gaap	Fair Value Assets Level1 To Level2 Transfers Amount FairValueAssetsLevel1ToLevel2TransfersAmount	0	USD
CY2015	us-gaap	Gain Loss On Discontinuation Of Cash Flow Hedge Due To Forecasted Transaction Probable Of Not Occurring Net GainLossOnDiscontinuationOfCashFlowHedgeDueToForecastedTransactionProbableOfNotOccurringNet	0	USD
CY2015	us-gaap	Gain Loss From Components Excluded From Assessment Of Fair Value Hedge Effectiveness Net GainLossFromComponentsExcludedFromAssessmentOfFairValueHedgeEffectivenessNet	0	USD
CY2014	us-gaap	Gain Loss From Components Excluded From Assessment Of Fair Value Hedge Effectiveness Net GainLossFromComponentsExcludedFromAssessmentOfFairValueHedgeEffectivenessNet	0	USD
CY2014	us-gaap	Gain Loss On Discontinuation Of Cash Flow Hedge Due To Forecasted Transaction Probable Of Not Occurring Net GainLossOnDiscontinuationOfCashFlowHedgeDueToForecastedTransactionProbableOfNotOccurringNet	0	USD
CY2013	us-gaap	Gain Loss From Components Excluded From Assessment Of Fair Value Hedge Effectiveness Net GainLossFromComponentsExcludedFromAssessmentOfFairValueHedgeEffectivenessNet	0	USD
CY2013	us-gaap	Gain Loss On Discontinuation Of Cash Flow Hedge Due To Forecasted Transaction Probable Of Not Occurring Net GainLossOnDiscontinuationOfCashFlowHedgeDueToForecastedTransactionProbableOfNotOccurringNet	0	USD
CY2014	us-gaap	Gain Loss On Fair Value Hedge Ineffectiveness Net GainLossOnFairValueHedgeIneffectivenessNet	4000000	USD
CY2015	ibm	Debt Covenant Limit Based On Net Tangible Assets DebtCovenantLimitBasedOnNetTangibleAssets	0.1	pure
CY2015	ibm	Net Interest Expense Ratio NetInterestExpenseRatio	2.2	pure
CY2015	ibm	Number Of Business Segments To Which Landlord Ownership Is Assigned To When Assets Are Shared NumberOfBusinessSegmentsToWhichLandlordOwnershipIsAssignedToWhenAssetsAreShared	1
CY2015	us-gaap	Dividends Payable Date Of Record Day Month And Year DividendsPayableDateOfRecordDayMonthAndYear	2016-02-10
CY2015	ibm	Discontinuation Of Cash Flow Hedge Additional Time Period After Which Net Gain Loss In Aoci Must Be Reclassified Into Earnings DiscontinuationOfCashFlowHedgeAdditionalTimePeriodAfterWhichNetGainLossInAociMustBeReclassifiedIntoEarnings	P2M
CY2015	us-gaap	Dividends Payable Date Declared Day Month And Year DividendsPayableDateDeclaredDayMonthAndYear	2016-01-26
CY2015	us-gaap	Dividend Payable Date To Be Paid Day Month And Year DividendPayableDateToBePaidDayMonthAndYear	2016-03-10
CY2015Q4	ibm	Deferred Tax Assets Operating Loss Carryforwards And Tax Credit Carryforwards Domestic DeferredTaxAssetsOperatingLossCarryforwardsAndTaxCreditCarryforwardsDomestic	1066000000	USD
CY2015	us-gaap	Financing Receivable Allowance For Credit Losses Policy For Uncollectible Amounts FinancingReceivableAllowanceForCreditLossesPolicyForUncollectibleAmounts	<div><p style='text-align:left;margin-top:0pt;margin-bottom:0pt;line-height:12pt;' ><font style='font-family:Times New Roman;font-size:10pt;margin-left:0pt;' >The company determines its allowance for credit losses based on two portfolio segments: lease receivables and loan receivables, and further segments the portfo</font><font style='font-family:Times New Roman;font-size:10pt;' >lio into two classes: major markets and growth markets.</font></p></div><p style='line-height:20pt;' /><div><p style='text-align:left;margin-top:0pt;margin-bottom:0pt;line-height:12pt;' ><font style='font-family:Times New Roman;font-size:10pt;margin-left:0pt;' >When determining the allowances, financing receivables are evaluated either on an individual or a collective basis. For individually evaluated receivables, the company determines the expected cash flow for the receivable and calculates an estimate of </font><font style='font-family:Times New Roman;font-size:10pt;' >the potential loss and the probability of loss. For those accounts in which the loss is probable, the company records a specific reserve. In addition, the company records an unallocated reserve that is calculated by applying a reserve rate to its different</font><font style='font-family:Times New Roman;font-size:10pt;' > portfolios, excluding accounts that have been specifically reserved. This reserve rate is based upon credit rating, probability of default, term, characteristics (lease/loan) and loss history.</font></p></div>
CY2015Q4	us-gaap	Unamortized Debt Issuance Expense UnamortizedDebtIssuanceExpense	74000000	USD
CY2014Q4	us-gaap	Unamortized Debt Issuance Expense UnamortizedDebtIssuanceExpense	83000000	USD
CY2015	ibm	Effective Income Tax Rate Reconciliation Reduction In Utilization Oftax Credits Foreign EffectiveIncomeTaxRateReconciliationReductionInUtilizationOftaxCreditsForeign	0.025	pure
CY2015	ibm	Effective Income Tax Rate Reconciliation Increase In Tax Charges Related To Intercompany Licensing Of Intellectual Property EffectiveIncomeTaxRateReconciliationIncreaseInTaxChargesRelatedToIntercompanyLicensingOfIntellectualProperty	0.008	pure
CY2013Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	734000000	USD
CY2015Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	1255494724	shares
CY2014Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	1224685815	shares
CY2015Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Authorized ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized	274000000	shares
CY2015Q4	ibm	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Additional Authorization ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAdditionalAuthorization	66200000	shares
CY2015Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Available For Grant ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant	111600000	shares
CY2015Q4	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	871000000	USD
CY2014Q4	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	874000000	USD
CY2015	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition1 EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1	P2Y8M
CY2015	us-gaap	Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount	0	USD
CY2014	us-gaap	Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount	0	USD
CY2013	us-gaap	Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount	0	USD
CY2015Q4	ibm	Share Based Compensation Arrangement By Share Based Payment Award Additional Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardAdditionalOptionsOutstandingNumber	400000	shares
CY2015Q4	ibm	Share Based Compensation Arrangement By Share Based Payment Award Additional Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardAdditionalOptionsOutstandingWeightedAverageExercisePrice	50
CY2013Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	365000000	USD
CY2015	ibm	Proceeds From Payments For Divestiture Of Businesses Net Of Cash Divested ProceedsFromPaymentsForDivestitureOfBusinessesNetOfCashDivested	-401000000	USD
CY2014	ibm	Proceeds From Payments For Divestiture Of Businesses Net Of Cash Divested ProceedsFromPaymentsForDivestitureOfBusinessesNetOfCashDivested	2357000000	USD
CY2013	ibm	Proceeds From Payments For Divestiture Of Businesses Net Of Cash Divested ProceedsFromPaymentsForDivestitureOfBusinessesNetOfCashDivested	297000000	USD
CY2014Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	561000000	USD
CY2015Q4	us-gaap	Decrease In Unrecognized Tax Benefits Is Reasonably Possible DecreaseInUnrecognizedTaxBenefitsIsReasonablyPossible	413000000	USD
CY2015	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Writedown Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForWritedownOfSecuritiesBeforeTax	86000000	USD
CY2014	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Writedown Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForWritedownOfSecuritiesBeforeTax	0	USD
CY2015	dei	Document Type DocumentType	8-K
CY2015	us-gaap	Interest Expense InterestExpense	468000000	USD

Files In Submission

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$IBM
INTERNATIONAL BUSINESS MACHINES CORP Stock $ibm

2015 Q4 Form 8-K Financial Statement

#000110465916126857 Filed on June 13, 2016

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$IBM INTERNATIONAL BUSINESS MACHINES CORP Stock $ibm

2015 Q4 Form 8-K Financial Statement

#000110465916126857 Filed on June 13, 2016

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$IBM
INTERNATIONAL BUSINESS MACHINES CORP Stock $ibm