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Marketable Securities (Tables) | 3 Months Ended
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Mar. 31, 2015
Investments Debt And Equity Securities [Abstract] |
Schedule of Marketable Securities |
| Market value |  |  | Cost basis |  |  | Unrealized losses, net |
| (In millions) |
December 31, 2014: |  |  |  |  |  |  |  |  |  |  |
Current assets | $ | 2.7 |  |  | $ | 2.7 |  |  | $ | — |
Noncurrent assets: |  |  |  |  |  |  |  |  |  |  |
The Amalgamated Sugar Company LLC | $ | 250.0 |  |  | $ | 250.0 |  |  | $ | — |
Other |  | 5.6 |  |  |  | 5.8 |  |  |  | (.2 | )
Total | $ | 255.6 |  |  | $ | 255.8 |  |  | $ | (.2 | )
March 31, 2015: |  |  |  |  |  |  |  |  |  |  |
Current assets | $ | .9 |  |  | $ | .9 |  |  | $ | — |
Noncurrent assets: |  |  |  |  |  |  |  |  |  |  |
The Amalgamated Sugar Company LLC | $ | 250.0 |  |  | $ | 250.0 |  |  | $ | — |
Other |  | 5.6 |  |  |  | 5.7 |  |  |  | (.1 | )
Total | $ | 255.6 |  |  | $ | 255.7 |  |  | $ | (.1 | )

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