Net Income Per Common Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Basic net income per share:
Net income attributable to AGCO Corporation and subsidiaries	$ 67.1	$ 65.0	$ 204.3	$ 332.8
Weighted average number of common shares outstanding, shares	86.6	93.5	87.7	94.2
Basic net income per share attributable to AGCO Corporation and subsidiaries, dollars per share	$ 0.77	$ 0.70	$ 2.33	$ 3.53
Diluted net income per share:
Dilutive SSARs, performance share awards and restricted stock awards, shares	0.1	0.2	0.1	0.3
Weighted average assumed conversion of contingently convertible senior subordinated notes, shares	0.0	0.1	0.0	0.7
Weighted average number of common shares and common share equivalents outstanding for purposes of computing diluted income per share, shares	86.7	93.8	87.8	95.2
Diluted net income per share attributable to AGCO Corporation and subsidiaries, dollars per share	$ 0.77	$ 0.69	$ 2.33	$ 3.50
Stock Appreciation Rights (SARs) [Member]
Diluted net income per share:
SSARs excluded from earnings per share computation, shares	0.9	1.1	0.9	1.1