Changes In Equity And Comprehensive Income (Total Comprehensive Income (Loss) (Details) (USD $) In Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Net income (loss)	$ 133.9	$ 62.8	$ 215.5	$ 72.8
Unrealized gain (loss) on derivatives			8.0
Noncontrolling Interests [Member]
Net income (loss)	0.2	(0.1)	1.8	(0.2)
Foreign currency translation adjustments	0.1	(0.1)	0.1	(0.1)
Total comprehensive income (loss)	0.3	(0.2)	1.9	(0.3)
Noncontrolling Interests [Member] | AGCO Corporation And Subsidiaries [Member]
Net income (loss)			1.8
Foreign currency translation adjustments			0.1
AGCO Corporation And Subsidiaries [Member]
Net income (loss)	133.7	62.9	213.7	73.0
Foreign currency translation adjustments	75.4	(76.8)	168.0	(151.1)
Defined benefit pension plans	1.5	1.7	3.1	3.3
Unrealized gain (loss) on derivatives	1.2	(5.5)	5.3	(6.2)
Unrealized gain on derivatives held by affiliates		0.1		0.2
Total comprehensive income (loss)	$ 211.8	$ (17.6)	$ 390.1	$ (80.8)