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Income Taxes (Narrative) (Details) (USD $)
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Income Taxes [Line Items]      
Undistributed earnings of foreign subsidiaries $ 3,300,000,000us-gaap_UndistributedEarningsOfForeignSubsidiaries    
Change in valuation allowance 22,800,000us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance 9,300,000us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance (64,300,000)us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance
Income Tax Reconciliation, Tax Credits, Research     13,100,000us-gaap_IncomeTaxReconciliationTaxCreditsResearch
Deferred Tax Assets, Net 4,200,000us-gaap_DeferredTaxAssetsLiabilitiesNet 9,700,000us-gaap_DeferredTaxAssetsLiabilitiesNet  
Valuation allowance 93,300,000us-gaap_DeferredTaxAssetsValuationAllowance 77,200,000us-gaap_DeferredTaxAssetsValuationAllowance  
Net operating loss carryforwards 265,500,000us-gaap_OperatingLossCarryforwards    
Net operating loss carryforwards not subject to expiration 209,600,000us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsNotSubjectToExpiration    
Income taxes paid 223,600,000us-gaap_IncomeTaxesPaid 174,500,000us-gaap_IncomeTaxesPaid 147,700,000us-gaap_IncomeTaxesPaid
Unrecognized income tax benefits that would affect effective tax rate 130,600,000us-gaap_UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate 122,200,000us-gaap_UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate  
Accrued or deferred taxes relating to uncertain income tax positions 64,700,000us-gaap_LiabilityForUncertainTaxPositionsCurrent 61,900,000us-gaap_LiabilityForUncertainTaxPositionsCurrent  
Accrued interest and penalties related to unrecognized tax benefits 2,300,000agco_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccruedOnProvision    
Accrued interest and penalties relating to unrecognized tax benefits 15,300,000us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued 14,400,000us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued  
UNITED STATES      
Income Taxes [Line Items]      
Change in valuation allowance     13,800,000us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount
/ us-gaap_IncomeTaxAuthorityAxis
= country_US
Foreign      
Income Taxes [Line Items]      
Net operating loss carryforwards 265,500,000us-gaap_OperatingLossCarryforwards
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_ForeignCountryMember		    
2015      
Income Taxes [Line Items]      
Net operating loss carryforwards, by expiration date 900,000us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsSubjectToExpiration
/ agco_OperatingLossCarryforwardsByExpirationDateAxis
= agco_OperatingLossCarryforwardsByExpirationDateDateOneMember		    
2016      
Income Taxes [Line Items]      
Net operating loss carryforwards, by expiration date 23,300,000us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsSubjectToExpiration
/ agco_OperatingLossCarryforwardsByExpirationDateAxis
= agco_OperatingLossCarryforwardsByExpirationDateDateTwoMember		    
2017      
Income Taxes [Line Items]      
Net operating loss carryforwards, by expiration date 31,700,000us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsSubjectToExpiration
/ agco_OperatingLossCarryforwardsByExpirationDateAxis
= agco_OperatingLossCarryforwardsByExpirationDateDateThreeMember		    
UNITED STATES      
Income Taxes [Line Items]      
Change in valuation allowance     $ 54,700,000us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance
/ us-gaap_ValuationAllowanceByDeferredTaxAssetAxis
= country_US