Quarterly report [Sections 13 or 15(d)]

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

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Cash, Cash Equivalents, Restricted Cash and Investments - Schedule of Cash, Cash Equivalents and Short-term Investments Measured at Fair Value on Recurring Basis (Details) - USD ($)
$ in Millions
Mar. 31, 2025
Dec. 31, 2024
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total cash and cash equivalents $ 170 $ 211
Total short-term investments 989 1,012
U.S. Treasury securities    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total short-term investments 721 728
U.S. Treasury securities | Level 2    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total short-term investments 721 728
Commercial paper    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total short-term investments 100 132
Commercial paper | Level 2    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total short-term investments 100 132
Corporate bonds and notes    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total short-term investments 168 152
Corporate bonds and notes | Level 2    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total short-term investments 168 152
Bank deposits | Level 1    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total cash and cash equivalents 1 1
Money market funds | Level 1    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total cash and cash equivalents 164 165
U.S. Treasury securities | Level 2    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total cash and cash equivalents 5 40
Commercial paper | Level 2    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total cash and cash equivalents $ 0 $ 5