Net Income Per Common Share (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014
Basic net income per share:
Net income attributable to AGCO Corporation and subsidiaries	$ 30.1us-gaap_NetIncomeLoss	$ 99.6us-gaap_NetIncomeLoss
Weighted average number of common shares outstanding, shares	88.8	95.3
Basic net income per share attributable to AGCO Corporation and subsidiaries, dollars per share	$ 0.34us-gaap_EarningsPerShareBasic	$ 1.05us-gaap_EarningsPerShareBasic
Diluted net income per share:
Dilutive SSARs, performance share awards and restricted stock awards, shares	0.2	0.4
Weighted average assumed conversion of contingently convertible senior subordinated notes, shares	0	0.9
Weighted average number of common shares and common share equivalents outstanding for purposes of computing diluted income per share, shares	89.0	96.6
Diluted net income per share attributable to AGCO Corporation and subsidiaries, dollars per share	$ 0.34us-gaap_EarningsPerShareDiluted	$ 1.03us-gaap_EarningsPerShareDiluted
Stock Appreciation Rights (SARs) [Member]
Diluted net income per share:
SSARs excluded from earnings per share computation, shares	1.3	1.1

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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