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Investments | 12 Months Ended
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Dec. 31, 2017
Investments |
Investments | Note 2 - Investments The following is a summary of the amortized cost and estimated fair value of short-term investments categorized as trading securities at the end of each year:
|  | December 31, 2017 |  | December 31, 2016 |
|  | Amortized |  | Fair |  | Amortized |  | Fair |
(Millions of dollars) |  | Cost |  | Value |  | Cost |  | Value |
Domestic equity securities |  |  | 619 |  |  | 752 |  |  | 444 |  |  | 482 |
Domestic debt securities held in mutual funds/ETFs/U.S. Treasuries |  |  | 438 |  |  | 439 |  |  | 437 |  |  | 437 |
Foreign equity securities |  |  | 266 |  |  | 319 |  |  | 198 |  |  | 199 |
Collateralized loan obligations |  |  | 29 |  |  | 29 |  |  | 25 |  |  | 26 |
High yield securities |  |  | 20 |  |  | 21 |  |  | 114 |  |  | 115 |
Money market funds held in trading accounts |  |  | 10 |  |  | 10 |  |  | 13 |  |  | 13 |
Other trading securities |  |  | 5 |  |  | 6 |  |  | 5 |  |  | 5 |
Total trading short-term investments |  | $ | 1,387 |  | $ | 1,576 |  | $ | 1,236 |  | $ | 1,277 |
The change in unrealized gains (losses) related to trading securities still held at the end of the respective reporting period was $146 million, $49 million and $(12) million for the years ended December 31, 2017, 2016 and 2015, respectively. Seaboard had $114 million of equity securities denominated in foreign currencies at December 31, 2017, with $48 million in euros, $25 million in Japanese yen, $20 million in the British pound, $6 million in the Swiss franc and the remaining $15 million in various other currencies. Seaboard had $91 million of equity securities denominated in foreign currencies at December 31, 2016, with $35 million in euros, $20 million in Japanese yen, $16 million in the British pound, $6 million in the Swiss franc and the remaining $14 million in various other currencies. Also, money market funds included less than $1 million and $1 million denominated in various foreign currencies at December 31, 2017 and 2016, respectively. Subsequent to year-end, Seaboard sold $314 million of its domestic debt securities to fund an acquisition in January 2018. See Note 12 for further information on this acquisition. In addition to its short-term investments, Seaboard also has trading securities related to Seaboard’s deferred compensation plans classified in other current assets on the consolidated balance sheets. See Note 8 for information on the types of trading securities held related to the deferred compensation plans. See Note 9 for a discussion of assets held in conjunction with investments related to Seaboard’s defined benefit pension plan. Seaboard had $6 million and $28 million of cost method investments classified in other non-current assets on the consolidated balance sheets as of December 31, 2017 and 2016, respectively. During 2017, Seaboard increased its ownership interest in a grain trading and poultry business in Morocco to 19.4%, which resulted in the original $18 million being reclassified as an equity method investment.

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- Definition The entire disclosure for investments in certain debt and equity securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -URI http://asc.fasb.org/topic&trid=2196928 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 320 -URI http://asc.fasb.org/subtopic&trid=4738149 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 940 -SubTopic 320 -URI http://asc.fasb.org/subtopic&trid=2176304 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 320 -URI http://asc.fasb.org/subtopic&trid=2324412 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 320 -URI http://asc.fasb.org/subtopic&trid=2209399 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 954 -SubTopic 320 -URI http://asc.fasb.org/subtopic&trid=2289146 + Details
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