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Operations and Summary of Significant Accounting Policies (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2006
Sep. 11, 2014
Accounting Policies [Line Items]          
Number of Independent Dealers and Distributors 3,100agco_NumberOfIndependentDealersAndDistributors        
Investment in affiliates $ 424.1us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures $ 416.1us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures $ 390.3us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures    
Time period in which remaining installment balance is generally due 12 months        
Cash and Cash Equivalents [Abstract]          
Cash 215.3us-gaap_Cash 465.2us-gaap_Cash      
Cash Equivalents, at Carrying Value 148.4us-gaap_CashEquivalentsAtCarryingValue 582.0us-gaap_CashEquivalentsAtCarryingValue      
Impairment charge 0us-gaap_GoodwillAndIntangibleAssetImpairment 0us-gaap_GoodwillAndIntangibleAssetImpairment 22.4us-gaap_GoodwillAndIntangibleAssetImpairment    
Goodwill, Impaired, Accumulated Impairment Loss 180.5us-gaap_GoodwillImpairedAccumulatedImpairmentLoss        
Goodwill, Impairment Loss     9.1us-gaap_GoodwillImpairmentLoss (171.4)us-gaap_GoodwillImpairmentLoss  
Goodwill, Subsequent Recognition of Deferred Tax Asset   $ 8.0us-gaap_GoodwillSubsequentRecognitionOfDeferredTaxAsset $ 7.8us-gaap_GoodwillSubsequentRecognitionOfDeferredTaxAsset    
Equipment Sales | United States and Canada          
Revenue Recognition [Abstract]          
Payment period on product sales 12 months        
Large Seasonal Products | United States and Canada          
Revenue Recognition [Abstract]          
Payment period on product sales 6 months        
Replacement Parts | United States and Canada          
Revenue Recognition [Abstract]          
Payment period on product sales 30 days        
Grain Storage and Protein Production Systems | United States and Canada          
Revenue Recognition [Abstract]          
Payment period on product sales 30 days        
Minimum          
Accounting Policies [Line Items]          
Ownership percentage 20.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
       
Revenue Recognition [Abstract]          
Interest Income Period On Installment Agreements 6 months        
Payment period on product sales 1 month        
Interest Free Period on Receivables 1 month        
Minimum | Equipment Sales | International          
Revenue Recognition [Abstract]          
Payment period on product sales 30 days        
Minimum | Replacement Parts | International          
Revenue Recognition [Abstract]          
Payment period on product sales 30 days        
Maximum          
Revenue Recognition [Abstract]          
Interest Income Period On Installment Agreements 12 months        
Payment period on product sales 12 months        
Interest Free Period on Receivables 12 months        
Maximum | Equipment Sales | International          
Revenue Recognition [Abstract]          
Payment period on product sales 180 days        
Maximum | Large Seasonal Products          
Revenue Recognition [Abstract]          
Interest Free Period on Receivables 23 months        
Maximum | Large Seasonal Products | International          
Revenue Recognition [Abstract]          
Payment period on product sales 6 months        
Maximum | Replacement Parts | International          
Revenue Recognition [Abstract]          
Payment period on product sales 90 days        
GIMA          
Accounting Policies [Line Items]          
Ownership percentage 50.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ dei_LegalEntityAxis
= agco_GimaMember
50.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ dei_LegalEntityAxis
= agco_GimaMember
     
Rabobank | Co-venturer          
Accounting Policies [Line Items]          
Ownership interest of controlling interest 51.00%agco_OwnershipInterestOfControllingInterest
/ dei_LegalEntityAxis
= agco_RabobankMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_CoVenturerMember
       
Santal          
Accounting Policies [Line Items]          
Company acquired, percent         39.00%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired
/ us-gaap_BusinessAcquisitionAxis
= agco_SantalMember