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Cash, Cash Equivalents, and Marketable Securities (Details) - USD ($)
$ in Millions
Jun. 30, 2023
Dec. 31, 2022
Jun. 30, 2022
Dec. 31, 2021
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]        
Cash, Cash Equivalents, and Short-term Investments $ 8,362 $ 8,207    
Total cash and cash equivalents 11,461 10,393    
Restricted Cash 131 127    
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents 11,592 10,520 $ 6,406 $ 11,091
Fair Value, Recurring [Member]        
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]        
Cash and cash equivalents 3,099 2,186    
Fair Value, Recurring [Member] | Level 2 [Member]        
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]        
Marketable securities 1,606 1,493    
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 1,252 1,045    
Marketable securities 281 187    
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 650 150    
Marketable securities 319 221    
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 441 199    
Marketable securities 577 658    
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 756 792    
Marketable securities 271 266    
Other Debt Obligations [Member] | Fair Value, Recurring [Member] | Level 2 [Member]        
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]        
Marketable securities $ 158 $ 161