Changes in Stockholders' Equity (Reclassifications out of Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Cost of goods sold	$ 1,297.3	$ 1,244.6
Interest expense, net	10.7	10.5
Income before income taxes and equity in net earnings of affiliates	8.1	2.4
Income tax provision (benefit)	11.1	(0.4)
Net income attributable to AGCO Corporation and subsidiaries	10.1	(7.8)
Net losses reclassified from accumulated other comprehensive loss into income	4.2	2.4
Deferred Net (Losses) Gains on Derivatives [Member]
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Net losses reclassified from accumulated other comprehensive loss into income	1.3
Reclassification from AOCI, Current Period, Tax	0.0
Net losses reclassified from accumulated other comprehensive loss into income	1.3
Accumulated Defined Benefit Plans Adjustment, Net Gain (Loss) Attributable to Parent [Member]
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Net losses reclassified from accumulated other comprehensive loss into income	3.0	2.6
Accumulated Defined Benefit Plans Adjustment, Net Prior Service Attributable to Parent [Member]
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Net losses reclassified from accumulated other comprehensive loss into income	0.4	0.3
Defined Benefit Pension Plans [Member]
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Net losses reclassified from accumulated other comprehensive loss into income	3.4	2.9
Reclassification from AOCI, Current Period, Tax	(0.5)	(0.7)
Net losses reclassified from accumulated other comprehensive loss into income	2.9	2.2
Reclassification out of Accumulated Other Comprehensive Income [Member] | Deferred Net (Losses) Gains on Derivatives [Member]
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Income before income taxes and equity in net earnings of affiliates	1.3	0.4
Income tax provision (benefit)	0.0	(0.2)
Net income attributable to AGCO Corporation and subsidiaries	1.3	0.2
Foreign Exchange Contract [Member] | 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	0.7	0.0
Interest Rate Contract [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member] | Deferred Net (Losses) Gains on Derivatives [Member]
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Interest expense, net	$ 0.6	$ 0.4