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v3.19.3.a.u2

Investments (Tables) | 12 Months Ended
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Dec. 31, 2019
Investments |
Summary of the estimated fair value of short-term investments classified as trading securities | ​
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​ | ​ | ​ | ​ | December 31, |
(Millions of dollars) | ​ | ​ | 2019 | ​ | ​ | 2018 | ​
Domestic equity securities | ​ | ​ | $ | 706 | ​ | ​ | $ | 632 | ​
Domestic debt securities | ​ | ​ |  | 409 | ​ | ​ |  | 268 | ​
Foreign equity securities | ​ | ​ | ​ | 189 | ​ | ​ | ​ | 218 | ​
High yield securities | ​ | ​ | ​ | 56 | ​ | ​ | ​ | 19 | ​
Foreign debt securities | ​ | ​ | ​ | 43 | ​ | ​ | ​ | 16 | ​
Collateralized loan obligations | ​ | ​ | ​ | 15 | ​ | ​ | ​ | 28 | ​
Money market funds held in trading accounts | ​ | ​ | ​ | 12 | ​ | ​ | ​ | 146 | ​
Other trading securities | ​ | ​ | ​ | 4 | ​ | ​ | ​ | 9 | ​
Total trading short-term investments | ​ | ​ | $ | 1,434 | ​ | ​ | $ | 1,336 | ​

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- Definition Tabular disclosure of investment. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 325 -URI http://asc.fasb.org/topic&trid=2197064 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 321 -URI http://asc.fasb.org/topic&trid=75115024 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -URI http://asc.fasb.org/topic&trid=2196928 Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -URI http://asc.fasb.org/topic&trid=2196965 + Details
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