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Acquisitions Investments (Details) - USD ($)
$ in Millions
12 Months Ended
Jul. 13, 2020
Dec. 31, 2021
Jun. 30, 2020
Investment Holdings [Line Items]      
Equity Method Investment, Ownership Percentage     100.00%
Huatai Group [Member]      
Investment Holdings [Line Items]      
Equity Method Investment, Ownership Percentage     30.90%
Huatai Group [Member] | CHINA | Subsequent Event [Member]      
Investment Holdings [Line Items]      
Equity method investment, additional ownership agreed to be purchased   22.40%  
Amount agreed to acquire 22.4 percent of Huatai Group   $ 1,550  
Equity method investment, additional 15.3 ownership percentage obtained 15.30%    
Portion one of payments to acquire 22.4% of Huatai Group   $ 1,100  
Equity method investment, additional 7.1 percentage obtained   7.10%  
Portion two of payments to acquire equity method investments   $ 493