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Cash, Cash Equivalents, and Marketable Securities (Details) - USD ($)
$ in Millions
Sep. 30, 2022
Dec. 31, 2021
Sep. 30, 2021
Dec. 31, 2020
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]        
Cash, Cash Equivalents, and Short-term Investments $ 5,289 $ 8,920    
Total cash and cash equivalents 6,351 10,963    
Restricted Cash 102 128    
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents 6,453 11,091 $ 13,092 $ 14,996
Fair Value, Recurring [Member]        
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]        
Cash and cash equivalents 1,062 2,043    
Fair Value, Recurring [Member] | Level 2 [Member]        
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]        
Marketable securities 1,845 2,173    
US Government [Member] | Fair Value, Recurring [Member] | Level 1 [Member]        
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]        
Cash and cash equivalents 30 711    
Marketable securities 305 864    
US Government Agencies [Member] | Fair Value, Recurring [Member] | Level 2 [Member]        
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]        
Cash and cash equivalents 0 240    
Marketable securities 245 75    
Debt Security, Government, Non-US [Member] | Fair Value, Recurring [Member] | Level 2 [Member]        
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]        
Cash and cash equivalents 369 152    
Marketable securities 866 697    
Corporate debt [Member] | Fair Value, Recurring [Member] | Level 2 [Member]        
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]        
Cash and cash equivalents 663 940    
Marketable securities 265 304    
Other Debt Obligations [Member] | Fair Value, Recurring [Member] | Level 2 [Member]        
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]        
Marketable securities $ 164 $ 233