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Segment Reporting (Schedule of Disclosure on Geographic Areas, Long-Lived Assets in Individual Foreign Countries by Country) (Details) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Revenues from External Customers and Long-Lived Assets [Line Items]    
Property, plant and equipment and amortizable intangible assets $ 1,995.2agco_PropertyPlantAndEquipmentAndAmortizableIntangibleAssets $ 2,074.2agco_PropertyPlantAndEquipmentAndAmortizableIntangibleAssets
United States    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Property, plant and equipment and amortizable intangible assets 666.7agco_PropertyPlantAndEquipmentAndAmortizableIntangibleAssets
/ us-gaap_StatementGeographicalAxis
= country_US
634.4agco_PropertyPlantAndEquipmentAndAmortizableIntangibleAssets
/ us-gaap_StatementGeographicalAxis
= country_US
Finland    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Property, plant and equipment and amortizable intangible assets 192.5agco_PropertyPlantAndEquipmentAndAmortizableIntangibleAssets
/ us-gaap_StatementGeographicalAxis
= country_FI
221.3agco_PropertyPlantAndEquipmentAndAmortizableIntangibleAssets
/ us-gaap_StatementGeographicalAxis
= country_FI
Germany    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Property, plant and equipment and amortizable intangible assets 420.8agco_PropertyPlantAndEquipmentAndAmortizableIntangibleAssets
/ us-gaap_StatementGeographicalAxis
= country_DE
498.1agco_PropertyPlantAndEquipmentAndAmortizableIntangibleAssets
/ us-gaap_StatementGeographicalAxis
= country_DE
Brazil    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Property, plant and equipment and amortizable intangible assets 204.1agco_PropertyPlantAndEquipmentAndAmortizableIntangibleAssets
/ us-gaap_StatementGeographicalAxis
= country_BR
218.4agco_PropertyPlantAndEquipmentAndAmortizableIntangibleAssets
/ us-gaap_StatementGeographicalAxis
= country_BR
Italy    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Property, plant and equipment and amortizable intangible assets 101.8agco_PropertyPlantAndEquipmentAndAmortizableIntangibleAssets
/ us-gaap_StatementGeographicalAxis
= country_IT
117.6agco_PropertyPlantAndEquipmentAndAmortizableIntangibleAssets
/ us-gaap_StatementGeographicalAxis
= country_IT
CHINA    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Property, plant and equipment and amortizable intangible assets 138.7agco_PropertyPlantAndEquipmentAndAmortizableIntangibleAssets
/ us-gaap_StatementGeographicalAxis
= country_CN
112.3agco_PropertyPlantAndEquipmentAndAmortizableIntangibleAssets
/ us-gaap_StatementGeographicalAxis
= country_CN
France    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Property, plant and equipment and amortizable intangible assets 83.2agco_PropertyPlantAndEquipmentAndAmortizableIntangibleAssets
/ us-gaap_StatementGeographicalAxis
= country_FR
87.3agco_PropertyPlantAndEquipmentAndAmortizableIntangibleAssets
/ us-gaap_StatementGeographicalAxis
= country_FR
Other    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Property, plant and equipment and amortizable intangible assets $ 187.4agco_PropertyPlantAndEquipmentAndAmortizableIntangibleAssets
/ us-gaap_StatementGeographicalAxis
= agco_RestOfWorldMember
$ 184.8agco_PropertyPlantAndEquipmentAndAmortizableIntangibleAssets
/ us-gaap_StatementGeographicalAxis
= agco_RestOfWorldMember