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Investments - Schedule of Investments (Details) - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Investments [Abstract]    
Equity method $ 6,111 $ 6,006
Marketable equity securities 406 460
Nonmarketable equity securities 1,735 1,950
Other investments 803 143
Total investments 9,055 8,559
Less: Current investments 368 292
Less: Investment securing collateralized obligation 605 447
Noncurrent investments $ 8,082 $ 7,820