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Investments - Equity Investments (Details) - USD ($)
$ in Millions
 6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Increase (Decrease) In Equity Investments [Roll Forward]    
Marketable securities, beginning balance $ 399  
Marketable securities, Purchases 0  
Marketable securities, Sales 0  
Marketable securities, Changes in Fair Value 55  
Marketable Securities, Other 8  
Marketable securities, ending balance 462  
Nonmarketable securities, beginning balance 1,331  
Nonmarketable Securities, Purchases 53  
Nonmarketable Securities, Sales (44)  
Nonmarketable Securities, Changes in Fair Value (144)  
Nonmarketable Securities, Other 6  
Nonmarketable securities, ending balance 1,202  
Total equity investments, beginning balance 1,730  
Total equity investments, Purchases 53  
Total equity investments, Sales (44) $ (6)
Total equity investments, Changes in Fair Value (89)  
Total equity investments, Other 14  
Total equity investments, ending balance $ 1,664