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Investments and Related Matters (Tables) | 12 Months Ended
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Dec. 31, 2018
Investment Segment |
Investment and Related Matters [Line Items] |
Investment |
| December 31,
| 2018 |  | 2017
Assets | (in millions)
Investments: |  |  |
Equity securities: |  |  |
Basic materials | $ | 414 |  |  | $ | 1,170 |
Consumer, non-cyclical | 2,161 |  |  | 2,551 |
Consumer, cyclical | 1,161 |  |  | 777 |
Energy | 1,598 |  |  | 1,489 |
Financial | 167 |  |  | 2,185 |
Technology | 1,040 |  |  | 833 |
Other | 145 |  |  | 372 |
| 6,686 |  |  | 9,377 |
Corporate debt securities | 181 |  |  | 155 |
| $ | 6,867 |  |  | $ | 9,532 |
Liabilities |  |  |
Securities sold, not yet purchased, at fair value: |  |  |
Equity securities: |  |  |
Consumer, non-cyclical | $ | 57 |  |  | $ | 101 |
Consumer, cyclical | 106 |  |  | 667 |
Energy | 305 |  |  | 110 |
Industrial | — |  |  | 110 |
| 468 |  |  | 988 |
Corporate debt securities | — |  |  | 35 |
| $ | 468 |  |  | $ | 1,023 |
Other Segments and Holding Company |
Investment and Related Matters [Line Items] |
Investment |
| December 31,
| 2018 |  | 2017
| (in millions)
Equity method investments | $ | 143 |  |  | $ | 83 |
Other investments (measured at fair value) | 1,327 |  |  | 400 |
| $ | 1,470 |  |  | $ | 483 |

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- Definition A table of investments, shown as a text block. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 6 -Section 10 -Paragraph (c) -Subparagraph (1) + Details
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