v3.25.2
Fair Value Measurements - Summary of Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - Fair Value On Recurring Basis - USD ($)
$ in Millions
Jun. 30, 2025
Dec. 31, 2024
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Total assets measured at fair value $ 927 $ 992
Total liabilities measured at fair value   21
Money market funds    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Cash, cash equivalents, and short-term investments 187 120
U.S. treasury securities    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Cash, cash equivalents, and short-term investments 229 251
Corporate securities and commercial paper    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Cash, cash equivalents, and short-term investments 485 592
U.S. government agency securities    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Cash, cash equivalents, and short-term investments 2 5
Certificate of deposit    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Cash, cash equivalents, and short-term investments 24 24
Liability for sale of future royalties    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Total liabilities measured at fair value   21
Level 1    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Total assets measured at fair value 187 120
Total liabilities measured at fair value   0
Level 1 | Money market funds    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Cash, cash equivalents, and short-term investments 187 120
Level 1 | U.S. treasury securities    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Cash, cash equivalents, and short-term investments 0 0
Level 1 | Corporate securities and commercial paper    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Cash, cash equivalents, and short-term investments 0 0
Level 1 | U.S. government agency securities    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Cash, cash equivalents, and short-term investments 0 0
Level 1 | Certificate of deposit    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Cash, cash equivalents, and short-term investments 0 0
Level 1 | Liability for sale of future royalties    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Total liabilities measured at fair value   0
Level 2    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Total assets measured at fair value 740 872
Total liabilities measured at fair value   0
Level 2 | Money market funds    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Cash, cash equivalents, and short-term investments 0 0
Level 2 | U.S. treasury securities    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Cash, cash equivalents, and short-term investments 229 251
Level 2 | Corporate securities and commercial paper    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Cash, cash equivalents, and short-term investments 485 592
Level 2 | U.S. government agency securities    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Cash, cash equivalents, and short-term investments 2 5
Level 2 | Certificate of deposit    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Cash, cash equivalents, and short-term investments 24 24
Level 2 | Liability for sale of future royalties    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Total liabilities measured at fair value   0
Level 3    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Total assets measured at fair value 0 0
Total liabilities measured at fair value   21
Level 3 | Money market funds    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Cash, cash equivalents, and short-term investments 0 0
Level 3 | U.S. treasury securities    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Cash, cash equivalents, and short-term investments 0 0
Level 3 | Corporate securities and commercial paper    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Cash, cash equivalents, and short-term investments 0 0
Level 3 | U.S. government agency securities    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Cash, cash equivalents, and short-term investments 0 0
Level 3 | Certificate of deposit    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Cash, cash equivalents, and short-term investments $ 0 0
Level 3 | Liability for sale of future royalties    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Total liabilities measured at fair value   $ 21