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Investments (Equity Investments Without Readily Determinable Fair Values Assessed Under the Measurement Alternative) (Details) - USD ($)
$ in Millions
Jun. 30, 2022
Apr. 08, 2022
Dec. 31, 2021
Other Investment Not Readily Marketable [Line Items]      
Equity investments without readily determinable fair value $ 637   $ 496
Equity securities without readily determinable fair value, cumulative upward adjustment 9    
Equity securities without readily determinable fair value, cumulative impairments $ 88    
WarnerMedia      
Other Investment Not Readily Marketable [Line Items]      
Equity investments without readily determinable fair value   $ 156