Net Income Per Common Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Net Income (Loss) Attributable to Parent	$ 157.3	$ 7.6	$ 291.7	$ 213.5
Basic net income per share:
Weighted average number of common shares outstanding (in shares)	74.9	76.1	75.0	76.4
Basic net income per share attributable to AGCO Corporation and subsidiaries (in dollars per share)	$ 2.10	$ 0.10	$ 3.89	$ 2.79
Diluted net income per share:
Dilutive SSARs, performance share awards and RSUs (in shares)	0.5	0.6	0.5	0.7
Weighted average number of common shares and common share equivalents outstanding for purposes of computing diluted income per share (in shares)	75.4	76.7	75.5	77.1
Diluted net income per share attributable to AGCO Corporation and subsidiaries (in dollars per share)	$ 2.09	$ 0.10	$ 3.86	$ 2.77
Stock-Settled Appreciation Rights
Diluted net income per share:
SSARs excluded from earnings per share computation (in shares)	0.5	0.2	0.7	0.4