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Marketable Securities | 9 Months Ended
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Sep. 30, 2017
Investments Debt And Equity Securities [Abstract] |
Marketable Securities | Note 6—Marketable securities:
| Market value |  |  | Cost basis |  |  | Unrealized losses, net |
| (In millions) |
December 31, 2016: |  |  |  |  |  |  |  |  |  |  |
Current assets | $ | 4.4 |  |  | $ | 4.4 |  |  | $ | — |
Noncurrent assets: |  |  |  |  |  |  |  |  |  |  |
The Amalgamated Sugar Company LLC | $ | 250.0 |  |  | $ | 250.0 |  |  | $ | — |
Other |  | 3.5 |  |  |  | 3.7 |  |  |  | (.2 | )
Total | $ | 253.5 |  |  | $ | 253.7 |  |  | $ | (.2 | )
September 30, 2017: |  |  |  |  |  |  |  |  |  |  |
Current assets | $ | .8 |  |  | $ | .8 |  |  | $ | — |
Noncurrent assets: |  |  |  |  |  |  |  |  |  |  |
The Amalgamated Sugar Company LLC | $ | 250.0 |  |  | $ | 250.0 |  |  | $ | — |
Other |  | 6.7 |  |  |  | 6.9 |  |  |  | (.2 | )
Total | $ | 256.7 |  |  | $ | 256.9 |  |  | $ | (.2 | )
All of our marketable securities are accounted for as available-for-sale, which are carried at fair value, with any unrealized gains or losses recognized through accumulated other comprehensive income. Our marketable securities are carried at fair value using quoted market prices, primarily Level 1 inputs as defined by ASC Topic 820, Fair Value Measurements and Disclosures, except for our investment in The Amalgamated Sugar Company LLC (“Amalgamated”). Our investment in Amalgamated is measured using significant unobservable inputs, which are Level 3 inputs. Please refer to Note 6 in our 2016 Annual Report for a complete description of the valuation methodology for our investment in Amalgamated. There have been no changes to the carrying value of this investment during the periods presented. See Note 17.

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