Annual report pursuant to Section 13 and 15(d)

Cash, Cash Equivalents and Investments - Cash, Cash Equivalents, Short-term Investments and Long-term Investments Measured at Fair Value on Recurring Basis (Details)

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Cash, Cash Equivalents and Investments - Cash, Cash Equivalents, Short-term Investments and Long-term Investments Measured at Fair Value on Recurring Basis (Details) - USD ($)
$ in Millions
Dec. 31, 2023
Dec. 31, 2022
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total cash and cash equivalents $ 501 $ 262
Total short-term and long-term investments 847 839
U.S. Treasury securities    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total short-term and long-term investments 769 839
U.S. Treasury securities | Level 2    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total short-term and long-term investments 769 839
Commercial Paper    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total short-term and long-term investments 54  
Commercial Paper | Level 2    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total short-term and long-term investments 54 0
Corporate Bonds and Notes    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total short-term and long-term investments 24  
Corporate Bonds and Notes | Level 2    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total short-term and long-term investments 24 0
Bank deposits | Level 1    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total cash and cash equivalents 0 1
Money market funds | Level 1    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total cash and cash equivalents 220 204
U.S. Treasury securities | Level 2    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total cash and cash equivalents 251 57
Commercial Paper | Level 2    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total cash and cash equivalents $ 30 $ 0