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Investments and Related Matters (Tables) | 3 Months Ended
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Mar. 31, 2016
Investment Segment [Member] |
Investment and Related Matters [Line Items] |
Investment |
| March 31, 2016 |  | December 31, 2015
Assets | (in millions)
Investments: |  |  |
Equity securities: |  |  |
Basic materials | $ | 860 |  |  | $ | 563 |
Communications | 218 |  |  | 407 |
Consumer, non-cyclical | 3,035 |  |  | 3,684 |
Consumer, cyclical | 163 |  |  | 115 |
Diversified | 16 |  |  | 17 |
Energy | 1,292 |  |  | 1,461 |
Financial | 1,921 |  |  | 2,094 |
Industrial | 222 |  |  | 188 |
Technology | 1,274 |  |  | 5,795 |
| 9,001 |  |  | 14,324 |
Corporate debt: |  |  |
Consumer, cyclical | 116 |  |  | 55 |
Financial | 4 |  |  | 4 |
Sovereign debt | — |  |  | 13 |
Utilities | 12 |  |  | — |
| 132 |  |  | 72 |
Mortgage-backed securities: |  |  |
Financial | 138 |  |  | 157 |
| $ | 9,271 |  |  | $ | 14,553 |
Liabilities |  |  |
Securities sold, not yet purchased, at fair value: |  |  |
Equity securities: |  |  |
Consumer, non-cyclical | $ | — |  |  | $ | 794 |
Consumer, cyclical | 847 |  |  | — |
Financial | 151 |  |  | — |
| 998 |  |  | 794 |
Debt securities: |  |  |
Consumer, cyclical | 54 |  |  | — |
| $ | 1,052 |  |  | $ | 794 |
Other Segments [Member] |
Investment and Related Matters [Line Items] |
Investment | Other Segments The carrying value of investments held by our other segments and our Holding Company consist of the following:
| March 31, 2016 |  | December 31, 2015
| (in millions)
Equity method investments | $ | 340 |  |  | $ | 323 |
Other investments | 415 |  |  | 475 |
| $ | 755 |  |  | $ | 798 |

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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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