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Equity (Details) (USD $) In Millions, except Share data, unless otherwise specified | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2012 | Sep. 30, 2011 | Sep. 30, 2012 | Sep. 30, 2011
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Tax |  |  |  |  | $ 13.7 |  |  |
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Tax Effect |  |  |  |  | 2.8 |  |  |
Common Stock, Dividends, Per Share, Declared |  |  |  |  | $ 0.09 |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Total equity, beginning balance |  |  |  |  | 1,304.1 |  |  |
Net Income | 94.6 |  | 90.9 |  | 329.5 |  | 300.5 |
Stock compensation plans |  |  |  |  | 25.6 |  |  |
Excess tax benefit from share-based compensation |  |  |  |  | 7.4 |  |  |
Shares for benefit plan trust |  |  |  |  | 2.2 |  |  |
Net unrealized pension and other benefit actuarial gains/(losses) and prior service (cost) credits | 4.8 |  | 5.1 |  | 21.0 | [1] | 15.3 |
Unrealized hedging gains/(losses) and other | 3.7 |  | (7.1) |  | 4.6 | [1] | (3.3) |
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax | 13.3 | [2] | (21.8) | [2] | (4.9) | [1],[2] | 6.2 | [2]
Dividends |  |  |  |  | (37.3) |  |  |
Repurchases of common stock |  |  |  |  | (144.9) |  | (110.0) |
Distributions to noncontrolling interests |  |  |  |  | (15.4) |  | (12.9) |
Total equity, ending balance | 1,488.1 |  |  |  | 1,488.1 |  |  |
Dividends, payment date | Oct. 18, 2012 |  |  |  |  |  |  |
Dividends payable, current | 12.4 |  |  |  | 12.4 |  |  |
Dividends, record date | Sep. 28, 2012 |  |  |  |  |  |  |
Dividends paid |  |  |  |  | 35.4 | [3] | 30.6 | [3]
Authorized repurchase amount | 250 |  |  |  |  |  |  |
Remaining authorized repurchase amount |  |  |  |  | 244.8 |  |  |
Shares repurchased | 3,072,540 |  |  |  |  |  |  |
Treasury Stock, Value, Acquired, Cost Method | 144.9 |  |  |  |  |  |  |
Shares repurchased, value |  |  |  |  | (148.7) |  |  |
FMC's Stockholders' Equity |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Total equity, beginning balance |  |  |  |  | 1,240.6 |  |  |
Net Income |  |  |  |  | 314.0 |  |  |
Stock compensation plans |  |  |  |  | 25.6 |  |  |
Excess tax benefit from share-based compensation |  |  |  |  | 7.4 |  |  |
Shares for benefit plan trust |  |  |  |  | 2.2 |  |  |
Net unrealized pension and other benefit actuarial gains/(losses) and prior service (cost) credits |  |  |  |  | 21.0 | [1] |  |
Unrealized hedging gains/(losses) and other |  |  |  |  | 4.6 | [1] |  |
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax |  |  |  |  | (4.8) | [1] |  |
Dividends |  |  |  |  | (37.3) |  |  |
Distributions to noncontrolling interests |  |  |  |  | 0 |  |  |
Total equity, ending balance | 1,424.6 |  |  |  | 1,424.6 |  |  |
Shares repurchased, value |  |  |  |  | (148.7) |  |  |
Non-controlling Interest |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Total equity, beginning balance |  |  |  |  | 63.5 |  |  |
Net Income |  |  |  |  | 15.5 |  |  |
Stock compensation plans |  |  |  |  | 0 |  |  |
Excess tax benefit from share-based compensation |  |  |  |  | 0 |  |  |
Shares for benefit plan trust |  |  |  |  | 0 |  |  |
Net unrealized pension and other benefit actuarial gains/(losses) and prior service (cost) credits |  |  |  |  | 0 | [1] |  |
Unrealized hedging gains/(losses) and other |  |  |  |  | 0 | [1] |  |
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax |  |  |  |  | (0.1) | [1] |  |
Dividends |  |  |  |  | 0 |  |  |
Distributions to noncontrolling interests |  |  |  |  | (15.4) |  |  |
Total equity, ending balance | 63.5 |  |  |  | 63.5 |  |  |
Shares repurchased, value |  |  |  |  | $ 0 |  |  |
[1] | See Condensed Consolidated Statements of Comprehensive Income.
[2] | Income taxes are not provided on the equity in undistributed earnings of our foreign subsidiaries or affiliates since it is our intention that such earnings will remain invested in those affiliates permanently.
[3] | See Note 13 regarding quarterly cash dividend.

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- Definition Equity impact of the value of stock that has been repurchased during the period and has not been retired and is not held in treasury. Some state laws may mandate the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 43 -Section B -Paragraph 11A -Chapter 1 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29, 30, 31 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 12 -Paragraph 10 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 + Details
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- Definition The amount authorized by an entity's Board of Directors under a stock repurchase plan. + References No definition available. + Details
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- Definition The remaining repurchase amount authorized by an entity's Board of Directors under a stock repurchase plan. + References No definition available. + Details
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- Definition Number of shares that have been repurchased during the period and are being held in treasury. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29, 30 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 12 -Paragraph 10 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 + Details
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- Definition Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the cost method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=6959260&loc=d3e187085-122770 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6405813&loc=d3e23239-112655 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 12 -Paragraph 10 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 43 -Section B -Paragraph 7 -Subparagraph b -Chapter 1 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 + Details
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