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Investments - Investment Segment (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Dec. 31, 2021
Schedule of Investments [Line Items]      
Investments $ 7,397   $ 9,151
Securities sold, not yet purchased, at fair value 4,776   5,340
Total Assets 27,829   27,746
Total liabilities 18,071   18,403
Total revenues 4,084 $ 3,384  
Net sales 2,968 2,218  
Cost of goods sold 2,538 2,139  
Net income 885 599  
Net (loss) income attributable to investee shareholders 323 162  
Investment Segment      
Schedule of Investments [Line Items]      
Investments 7,276   8,952
Securities sold, not yet purchased, at fair value 4,776   5,340
Portion of unrealized (losses) gains that relates to equity and debt securities still held 403 1,122  
Total Assets 17,173   17,135
Total liabilities 6,889   7,745
Total revenues 931 943  
Net sales 0 0  
Cost of goods sold 0 $ 0  
Investment Segment | Equity securities      
Schedule of Investments [Line Items]      
Investments 7,164   8,838
Investment Segment | Debt securities      
Schedule of Investments [Line Items]      
Investments 112   114
Investment Segment | Consumer, cyclical      
Schedule of Investments [Line Items]      
Investments 959   1,281
Securities sold, not yet purchased, at fair value 813   848
Investment Segment | Energy      
Schedule of Investments [Line Items]      
Investments 1,956   3,184
Securities sold, not yet purchased, at fair value 1,581   2,028
Investment Segment | Utilities      
Schedule of Investments [Line Items]      
Investments 1,097   992
Securities sold, not yet purchased, at fair value 813   659
Investment Segment | Healthcares      
Schedule of Investments [Line Items]      
Investments 842   1,009
Securities sold, not yet purchased, at fair value 990   1,049
Investment Segment | Technology      
Schedule of Investments [Line Items]      
Investments 845   931
Investment Segment | Basic materials      
Schedule of Investments [Line Items]      
Investments 185   194
Securities sold, not yet purchased, at fair value 282   365
Investment Segment | Industrial      
Schedule of Investments [Line Items]      
Investments 937   895
Securities sold, not yet purchased, at fair value 297   391
Investment Segment | Communication      
Schedule of Investments [Line Items]      
Investments $ 343   $ 352