Changes in Stockholders' Equity and Temporary Equity (Reclassifications out of Accumulated Other Comprehensive Income) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended			9 Months Ended
	Sep. 30, 2014		Sep. 30, 2013	Sep. 30, 2014		Sep. 30, 2013
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Cost of goods sold	$ 1,732.9		$ 1,919.7	$ 5,670.2		$ 6,127.6
Amortization of net actuarial loss				6.6
Amortization of prior service cost				(0.8)
Income before income taxes and equity in net earnings of affiliates	(84.7)		(173.6)	(453.4)		(638.1)
Income tax provision	34.2		62.5	163.8		219.8
Net income attributable to AGCO Corporation and subsidiaries	(65.0)		(126.2)	(332.8)		(457.9)
Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Net income attributable to AGCO Corporation and subsidiaries	2.3	[1]		6.0	[1]
Reclassification out of Accumulated Other Comprehensive Income [Member] | Deferred Gains on Derivatives [Member]
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Cost of goods sold	0.3	[1]		0.2	[1]
Income tax provision	0.1	[1]		0.2	[1]
Net income attributable to AGCO Corporation and subsidiaries	0.4	[1]		0.4	[1]
Reclassification out of Accumulated Other Comprehensive Income [Member] | Defined Benefit Pension Plans [Member]
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Amortization of net actuarial loss	2.2	[1],[2]		6.6	[1],[2]
Amortization of prior service cost	0.3	[1],[2]		0.8	[1],[2]
Income before income taxes and equity in net earnings of affiliates	2.5	[1]		7.4	[1]
Income tax provision	(0.6)	[1]		(1.8)	[1]
Net income attributable to AGCO Corporation and subsidiaries	$ 1.9	[1]		$ 5.6	[1]

[1] (Gains) losses included within the Condensed Consolidated Statements of Operations for the three and nine months ended September 30, 2014.

[2] These accumulated other comprehensive loss components are included in the computation of net periodic pension and postretirement benefit cost. See Note 13 to the Company’s Condensed Consolidated Financial Statements.