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Investments (Tables) | 3 Months Ended
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Mar. 31, 2022
Investment Segment |
Schedule of Investments [Line Items] |
Investment | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | March 31, | ​ | December 31,
​ |  | 2022 |  | 2021
​ | ​ | (in millions)
Assets | ​ | ​ | ​ | ​ | ​ | ​
Investments: |  | ​ |  |  | ​ |
Equity securities: |  | ​ |  |  | ​ |
Communications | ​ | $ | 343 | ​ | $ | 352
Consumer, cyclical | ​ |  | 959 | ​ |  | 1,281
Energy | ​ |  | 1,956 | ​ |  | 3,184
Utilities | ​ |  | 1,097 | ​ |  | 992
Healthcare | ​ |  | 842 | ​ |  | 1,009
Technology | ​ |  | 845 | ​ |  | 931
Materials | ​ |  | 185 | ​ |  | 194
Industrial | ​ |  | 937 | ​ |  | 895
​ | ​ |  | 7,164 | ​ |  | 8,838
Corporate debt securities | ​ |  | 112 | ​ |  | 114
​ | ​ | $ | 7,276 | ​ | $ | 8,952
Liabilities | ​ |  |  | ​ |  |
Securities sold, not yet purchased, at fair value: | ​ |  |  | ​ |  |
Equity securities: | ​ |  |  | ​ |  |
Consumer, cyclical | ​ | $ | 813 | ​ | $ | 848
Energy | ​ |  | 1,581 | ​ |  | 2,028
Utilities | ​ |  | 813 | ​ |  | 659
Healthcare | ​ |  | 990 | ​ |  | 1,049
Materials | ​ |  | 282 | ​ |  | 365
Industrial | ​ | ​ | 297 | ​ | ​ | 391
​ | ​ | $ | 4,776 | ​ | $ | 5,340
Other Segments and Holding Company |
Schedule of Investments [Line Items] |
Investment | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | March 31, | ​ | December 31,
​ |  | 2022 |  | 2021
​ | ​ | (in millions)
Equity method investments | ​ | $ | 78 | ​ | $ | 79
Other investments measured at fair value | ​ |  | 43 | ​ |  | 120
​ | ​ | $ | 121 | ​ | $ | 199

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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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