Changes in Stockholders' Equity (Reclassifications out of Accumulated Other Comprehensive Income) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2015		Mar. 31, 2014
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Cost of goods sold	$ 1,354.7		$ 1,818.5
Amortization of net actuarial loss	2.8
Amortization of prior service cost	(0.1)
Income before income taxes and equity in net earnings of affiliates	(26.8)		(130.6)
Income tax provision	10.6		46.4
Net income attributable to AGCO Corporation and subsidiaries	(30.1)		(99.6)
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	2.5	[1]	1.9	[1]
Reclassification out of Accumulated Other Comprehensive Income [Member] | Deferred Net (Losses) Gains on Derivatives [Member]
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Cost of goods sold	0.3	[1]	0.1	[1]
Income tax provision	0	[1]	0	[1]
Net income attributable to AGCO Corporation and subsidiaries	0.3	[1]	0.1	[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	2.8	[1],[2]	2.2	[1],[2]
Amortization of prior service cost	0.1	[1],[2]	0.2	[1],[2]
Income before income taxes and equity in net earnings of affiliates	2.9	[1]	2.4	[1]
Income tax provision	(0.7)	[1]	(0.6)	[1]
Net income attributable to AGCO Corporation and subsidiaries	$ 2.2	[1]	$ 1.8	[1]

[1] Losses included within the Condensed Consolidated Statements of Operations for the three months ended March 31, 2015

[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.