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Marketable securities (Tables) | 3 Months Ended
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Mar. 31, 2013
Investments Debt And Equity Securities [Abstract] |
Schedule of Marketable Securities |
|  | Market value |  |  | Cost basis |  |  | Unrealized gains, net |
|  | (In millions) |
December 31, 2012: |  |  |  |  |  |  |  |  |  |  |  |
Current assets: |  | $ | .9 |  |  | $ | .9 |  |  | $ | — |
Noncurrent assets: |  |  |  |  |  |  |  |  |  |  |  |
The Amalgamated Sugar Company LLC |  | $ | 250.0 |  |  | $ | 250.0 |  |  | $ | — |
Other |  |  | 6.8 |  |  |  | 6.7 |  |  |  | .1 |
Total |  | $ | 256.8 |  |  | $ | 256.7 |  |  | $ | .1 |
March 31, 2013: |  |  |  |  |  |  |  |  |  |  |  |
Current assets |  | $ | .9 |  |  | $ | .9 |  |  | $ | — |
Noncurrent assets: |  |  |  |  |  |  |  |  |  |  |  |
The Amalgamated Sugar Company LLC |  | $ | 250.0 |  |  | $ | 250.0 |  |  | $ | — |
Other |  |  | 6.7 |  |  |  | 6.6 |  |  |  | .1 |
Total |  | $ | 256.7 |  |  | $ | 256.6 |  |  | $ | .1 |

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- Definition Tabular disclosure of marketable securities. This may consist of investments in certain debt and equity securities, short-term investments and other assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27232-111563 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.2,12) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6871852&loc=d3e26626-111562 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27161-111563 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6871852&loc=d3e26610-111562 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.4) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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