Changes in Stockholders' Equity (Reclassifications out of Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Cost of goods sold	$ 2,054.4	$ 1,808.2
Reclassification before tax	186.1	180.3
Income tax provision	60.2	43.6
Other expense, net	17.5	11.5
Net income attributable to AGCO Corporation and subsidiaries	151.8	150.8
Reclassification out of Accumulated Other Comprehensive Income
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Net income attributable to AGCO Corporation and subsidiaries	0.8	7.6
Reclassification out of Accumulated Other Comprehensive Income | Derivatives
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Reclassification before tax	(1.2)	3.4
Income tax provision	0.3	0.3
Net income attributable to AGCO Corporation and subsidiaries	(0.9)	3.7
Reclassification out of Accumulated Other Comprehensive Income | Amortization of net actuarial losses
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Other expense, net	2.2	4.0
Reclassification out of Accumulated Other Comprehensive Income | Amortization of prior service cost
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Other expense, net	0.2	0.5
Reclassification out of Accumulated Other Comprehensive Income | Defined benefit plans
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Reclassification before tax	2.4	4.5
Income tax provision	(0.7)	(0.6)
Net income attributable to AGCO Corporation and subsidiaries	1.7	3.9
Foreign currency contracts | Reclassification out of Accumulated Other Comprehensive Income | Derivatives
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Cost of goods sold	0.1	3.4
Commodity contracts | Reclassification out of Accumulated Other Comprehensive Income | Derivatives
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Cost of goods sold	$ (1.3)	$ 0.0