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Acquisitions (Summarized Data Of the Result Of Operations) (Details) (USD $) In Millions, except Per Share data, unless otherwise specified | 12 Months Ended
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Dec. 31, 2011
Business Combinations [Abstract] |
Net sales | $ 9,479.1
Net income attributable to AGCO Corporation and subsidiaries | $ 629.5
Net income per common share attributable to AGCO Corporation and subsidaries [Abstract] |
Basic (in dollars per share) | $ 6.58
Diluted (in dollars per share) | $ 6.42

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