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Income Taxes (Details) (USD $)
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Components of income before income taxes [Abstract]      
U.S. operations $ 294,000,000us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic $ 219,000,000us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic $ 664,000,000us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic
Foreign operations 786,000,000us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign 636,000,000us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign 178,000,000us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign
Income from continuing operations before income taxes 1,080,000,000us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments 855,000,000us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments 842,000,000us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
Current [Abstract]      
U.S. federal 70,000,000us-gaap_CurrentFederalTaxExpenseBenefit 0us-gaap_CurrentFederalTaxExpenseBenefit 97,000,000us-gaap_CurrentFederalTaxExpenseBenefit
U.S. state and local 4,000,000us-gaap_CurrentStateAndLocalTaxExpenseBenefit 11,000,000us-gaap_CurrentStateAndLocalTaxExpenseBenefit 7,000,000us-gaap_CurrentStateAndLocalTaxExpenseBenefit
Foreign 231,000,000us-gaap_CurrentForeignTaxExpenseBenefit 166,000,000us-gaap_CurrentForeignTaxExpenseBenefit 137,000,000us-gaap_CurrentForeignTaxExpenseBenefit
Total Current Income Taxes 305,000,000us-gaap_CurrentIncomeTaxExpenseBenefit 177,000,000us-gaap_CurrentIncomeTaxExpenseBenefit 241,000,000us-gaap_CurrentIncomeTaxExpenseBenefit
Deferred [Abstract]      
U.S. federal 0us-gaap_DeferredFederalIncomeTaxExpenseBenefit 31,000,000us-gaap_DeferredFederalIncomeTaxExpenseBenefit (37,000,000)us-gaap_DeferredFederalIncomeTaxExpenseBenefit
U.S. state and local (3,000,000)us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit 2,000,000us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit (2,000,000)us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit
Foreign (44,000,000)us-gaap_DeferredForeignIncomeTaxExpenseBenefit (14,000,000)us-gaap_DeferredForeignIncomeTaxExpenseBenefit (45,000,000)us-gaap_DeferredForeignIncomeTaxExpenseBenefit
Total Deferred Income Taxes (47,000,000)us-gaap_DeferredIncomeTaxExpenseBenefit 19,000,000us-gaap_DeferredIncomeTaxExpenseBenefit (84,000,000)us-gaap_DeferredIncomeTaxExpenseBenefit
Income tax provision 258,000,000us-gaap_IncomeTaxExpenseBenefit 196,000,000us-gaap_IncomeTaxExpenseBenefit 157,000,000us-gaap_IncomeTaxExpenseBenefit
Effective income tax rate reconciliation [Abstract]      
U.S. federal statutory rate (in hundredths) 35.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate 35.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate 35.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate
State and local income taxes (in hundredths) 0.00%us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes 1.00%us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes 0.40%us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes
Foreign statutory rate differential (in hundredths) (10.70%)us-gaap_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential (11.60%)us-gaap_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential (10.20%)us-gaap_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential
Change in valuation allowance on deferred tax assets (in hundredths) 3.40%us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance (1.70%)us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance 6.60%us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance
Nondeductible expenses (in hundredths) (0.10%)us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpense 1.10%us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpense 0.90%us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpense
Net U.S. tax on foreign source income (in hundredths) (2.90%)us-gaap_EffectiveIncomeTaxRateReconciliationRepatriationOfForeignEarnings (3.20%)us-gaap_EffectiveIncomeTaxRateReconciliationRepatriationOfForeignEarnings (12.20%)us-gaap_EffectiveIncomeTaxRateReconciliationRepatriationOfForeignEarnings
All other (in hundredths) (0.80%)us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments 2.30%us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments (1.90%)us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments
Total (in hundredths) 23.90%us-gaap_EffectiveIncomeTaxRateContinuingOperations 22.90%us-gaap_EffectiveIncomeTaxRateContinuingOperations 18.60%us-gaap_EffectiveIncomeTaxRateContinuingOperations
Total income taxes paid 353,000,000us-gaap_IncomeTaxesPaid 329,000,000us-gaap_IncomeTaxesPaid 240,000,000us-gaap_IncomeTaxesPaid
Deferred tax liabilities [Abstract]      
Plant and equipment (190,000,000)us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment (171,000,000)us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment  
Intangible assets (221,000,000)us-gaap_DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets (251,000,000)us-gaap_DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets  
Other (9,000,000)us-gaap_DeferredTaxLiabilitiesOther (16,000,000)us-gaap_DeferredTaxLiabilitiesOther  
Total deferred tax liabilities (420,000,000)us-gaap_DeferredTaxLiabilities (438,000,000)us-gaap_DeferredTaxLiabilities  
Deferred tax assets [Abstract]      
Inventory 48,000,000us-gaap_DeferredTaxAssetsInventory 20,000,000us-gaap_DeferredTaxAssetsInventory  
Postretirement benefits other than pensions 3,000,000us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPostretirementBenefits 12,000,000us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPostretirementBenefits  
Reserves and accruals 160,000,000us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals 93,000,000us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals  
Net operating losses and tax credits 259,000,000us-gaap_DeferredTaxAssetsOperatingLossCarryforwards 246,000,000us-gaap_DeferredTaxAssetsOperatingLossCarryforwards  
Pensions 38,000,000us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPensions 16,000,000us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPensions  
Other 27,000,000us-gaap_DeferredTaxAssetsOther 17,000,000us-gaap_DeferredTaxAssetsOther  
Total deferred tax assets 535,000,000us-gaap_DeferredTaxAssetsGross 404,000,000us-gaap_DeferredTaxAssetsGross  
Valuation allowance (79,000,000)us-gaap_DeferredTaxAssetsValuationAllowance (59,000,000)us-gaap_DeferredTaxAssetsValuationAllowance (84,000,000)us-gaap_DeferredTaxAssetsValuationAllowance
Net deferred tax assets (liabilities) 36,000,000us-gaap_DeferredTaxAssetsLiabilitiesNet (93,000,000)us-gaap_DeferredTaxAssetsLiabilitiesNet  
Changes in unrecognized tax benefits [Roll Forward]      
Balance at beginning of year 103,000,000us-gaap_UnrecognizedTaxBenefits 121,000,000us-gaap_UnrecognizedTaxBenefits 148,000,000us-gaap_UnrecognizedTaxBenefits
Decreases in estimates for tax positions taken prior to the current year 0us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions 0us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions (11,000,000)us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions
Increases due to tax positions taken during the current year 6,000,000us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions 3,000,000us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions 0us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions
Decreases relating to settlements with tax authorities (10,000,000)us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities (19,000,000)us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities (10,000,000)us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities
Decreases resulting from the lapse of applicable statutes of limitation 0us-gaap_UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations 0us-gaap_UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations (7,000,000)us-gaap_UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations
Net increases (decreases) due to translation and interest (2,000,000)cam_UnrecognizedTaxBenefitsChangeTranslationAndInterest (2,000,000)cam_UnrecognizedTaxBenefitsChangeTranslationAndInterest 1,000,000cam_UnrecognizedTaxBenefitsChangeTranslationAndInterest
Balance at end of year 97,000,000us-gaap_UnrecognizedTaxBenefits 103,000,000us-gaap_UnrecognizedTaxBenefits 121,000,000us-gaap_UnrecognizedTaxBenefits
Unrecognized tax benefits expected to settle within twelve months 97,000,000us-gaap_SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleAmountOfUnrecordedBenefit    
Valuation Allowance [Abstract]      
Balance at beginning of year 59,000,000us-gaap_DeferredTaxAssetsValuationAllowance 84,000,000us-gaap_DeferredTaxAssetsValuationAllowance 30,000,000us-gaap_DeferredTaxAssetsValuationAllowance
Valuation allowances for unutilized net operating losses and excess foreign tax credits generated in the current year 25,000,000cam_ValuationAllowancesForUnutilizedNetOperatingLossesAndExcessForeignTaxCreditsGeneratedInCurrentYear 11,000,000cam_ValuationAllowancesForUnutilizedNetOperatingLossesAndExcessForeignTaxCreditsGeneratedInCurrentYear 36,000,000cam_ValuationAllowancesForUnutilizedNetOperatingLossesAndExcessForeignTaxCreditsGeneratedInCurrentYear
Change in valuation allowances related to prior years (2,000,000)cam_ChangeInValuationAllowancesRelatedToPriorYears (16,000,000)cam_ChangeInValuationAllowancesRelatedToPriorYears 19,000,000cam_ChangeInValuationAllowancesRelatedToPriorYears
Write-off of valuation allowances and associated deferred tax assets for certain losses that have no possibility of being utilized 0cam_WriteOffOfValuationAllowancesAndAssociatedDeferredTaxAssetsForCertainLossesThatHaveNoPossibilityOfBeingUtilized (19,000,000)cam_WriteOffOfValuationAllowancesAndAssociatedDeferredTaxAssetsForCertainLossesThatHaveNoPossibilityOfBeingUtilized 0cam_WriteOffOfValuationAllowancesAndAssociatedDeferredTaxAssetsForCertainLossesThatHaveNoPossibilityOfBeingUtilized
Effect of translation (3,000,000)cam_ValuationAllowanceEffectOfTranslation (1,000,000)cam_ValuationAllowanceEffectOfTranslation (1,000,000)cam_ValuationAllowanceEffectOfTranslation
Balance at ending of year 79,000,000us-gaap_DeferredTaxAssetsValuationAllowance 59,000,000us-gaap_DeferredTaxAssetsValuationAllowance 84,000,000us-gaap_DeferredTaxAssetsValuationAllowance
Tax Credit Carryforward [Line Items]      
Operating loss carryforwards regular income taxes expiration period 2018 - Indefinite    
Tax benefit associated with certain stock benefit plan transactions 6,000,000us-gaap_AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation 10,000,000us-gaap_AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation 12,000,000us-gaap_AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation
Unremitted foreign subsidiary earnings considered permanently reinvested 5,100,000,000us-gaap_UndistributedEarningsOfForeignSubsidiaries    
Tax holiday benefit in Singapore and Malaysia jurisdictions 11,000,000us-gaap_IncomeTaxHolidayAggregateDollarAmount 3,000,000us-gaap_IncomeTaxHolidayAggregateDollarAmount 2,000,000us-gaap_IncomeTaxHolidayAggregateDollarAmount
Minimum [Member]      
Tax Credit Carryforward [Line Items]      
Operating loss carryforwards state income taxes expiration year 2018    
Tax credit carryforward, expiration year 2016    
Maximum [Member]      
Tax Credit Carryforward [Line Items]      
Operating loss carryforwards state income taxes expiration year 2034    
Tax credit carryforward, expiration year 2024    
United States [Member]      
Income Tax Examination [Line Items]      
Earliest years remaining open to examinations 2011    
United Kingdom [Member]      
Income Tax Examination [Line Items]      
Earliest years remaining open to examinations 2012    
Canada [Member]      
Income Tax Examination [Line Items]      
Earliest years remaining open to examinations 2006    
France [Member]      
Income Tax Examination [Line Items]      
Earliest years remaining open to examinations 2012    
Germany [Member]      
Income Tax Examination [Line Items]      
Earliest years remaining open to examinations 2008    
Norway [Member]      
Income Tax Examination [Line Items]      
Earliest years remaining open to examinations 2010    
Singapore [Member]      
Income Tax Examination [Line Items]      
Earliest years remaining open to examinations 2010    
Italy [Member]      
Income Tax Examination [Line Items]      
Earliest years remaining open to examinations 2008    
Domestic Tax Authority [Member]      
Tax Credit Carryforward [Line Items]      
Operating loss carryforwards state income taxes 6,000,000cam_OperatingLossCarryforwardsStateIncomeTaxes
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_DomesticCountryMember		    
Operating loss carryforwards regular income taxes 0cam_OperatingLossCarryforwardsRegularIncomeTaxes
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_DomesticCountryMember		    
Foreign tax credits 93,000,000us-gaap_TaxCreditCarryforwardAmount
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_DomesticCountryMember		    
Foreign Tax Authority [Member]      
Tax Credit Carryforward [Line Items]      
Operating loss carryforwards state income taxes 0cam_OperatingLossCarryforwardsStateIncomeTaxes
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_ForeignCountryMember		    
Operating loss carryforwards regular income taxes 381,000,000cam_OperatingLossCarryforwardsRegularIncomeTaxes
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_ForeignCountryMember		    
Foreign tax credits $ 0us-gaap_TaxCreditCarryforwardAmount
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_ForeignCountryMember