Annual report pursuant to Section 13 and 15(d)

Cash, Cash Equivalents, Restricted Cash and Investments - Schedule of 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, Restricted Cash and Investments - Schedule of Cash, Cash Equivalents, Short-term Investments and Long-term Investments Measured at Fair Value on Recurring Basis (Details) - USD ($)
$ in Millions
Dec. 31, 2024
Dec. 31, 2023
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total cash and cash equivalents $ 211 $ 501
Total short-term and long-term investments 1,012 847
U.S. Treasury securities    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total short-term and long-term investments 728 769
U.S. Treasury securities | Level 2    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total short-term and long-term investments 728 769
Commercial paper    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total short-term and long-term investments 132 54
Commercial paper | Level 2    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total short-term and long-term investments 132 54
Corporate bonds and notes    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total short-term and long-term investments 152 24
Corporate bonds and notes | Level 2    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total short-term and long-term investments 152 24
Bank deposits | Level 1    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total cash and cash equivalents 1 0
Money market funds | Level 1    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total cash and cash equivalents 165 220
U.S. Treasury securities | Level 2    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total cash and cash equivalents 40 251
Commercial paper | Level 2    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total cash and cash equivalents $ 5 $ 30