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Investments and Variable Interest Entities (Schedule of Investments) (Details) - USD ($)
$ in Millions
Jun. 30, 2022
Dec. 31, 2021
Investments [Abstract]    
Equity method $ 5,824 $ 6,111
Marketable equity securities 130 406
Nonmarketable equity securities 1,753 1,735
Other investments 1,658 803
Total investments 9,364 9,055
Less: Current investments 1,124 368
Less: Investment securing collateralized obligation 642 605
Noncurrent investments $ 7,598 $ 8,082