v3.26.3
FINANCIAL INSTRUMENTS - Summary of Cash and Available-For-Sale Securities (Details) - USD ($)
$ in Millions
Sep. 30, 2026
Dec. 31, 2025
Debt Securities, Available-for-sale [Line Items]    
Cash and cash equivalents $ 2,978.1 $ 3,368.0
Total 4,331.3  
Gross Unrealized Gains 0.3 41.3
Gross Unrealized Losses (59.7) (1.7)
Allowance for Credit Loss (0.1) (0.1)
Fair Value 4,271.8  
Short- term Investments 1,064.4 2,566.9
Long- term Investments 2,757.9 3,099.2
Total assets measured at fair value, amortized cost 6,859.9 8,994.6
Total assets measured at fair value, fair value 6,800.4 9,034.1
Cash    
Debt Securities, Available-for-sale [Line Items]    
Cash and cash equivalents 649.4 514.9
Fair Value 649.4 514.9
Level 1    
Debt Securities, Available-for-sale [Line Items]    
Cash and cash equivalents 2,328.7 2,852.1
Total 5,569.7 7,981.3
Gross Unrealized Gains 0.3 39.0
Gross Unrealized Losses (45.7) (0.9)
Allowance for Credit Loss 0.0 0.0
Fair Value 5,524.3 8,019.4
Short- term Investments 862.3 2,345.5
Long- term Investments 2,333.3 2,821.8
Level 1 | Money market funds    
Debt Securities, Available-for-sale [Line Items]    
Cash and cash equivalents 1,879.2 2,287.0
Fair Value 1,879.2 2,287.0
Short- term Investments 0.0 0.0
Long- term Investments 0.0 0.0
Level 1 | U.S. treasuries    
Debt Securities, Available-for-sale [Line Items]    
Cash and cash equivalents 449.5 565.1
Total 3,690.5 5,694.3
Gross Unrealized Gains 0.3 39.0
Gross Unrealized Losses (45.7) (0.9)
Allowance for Credit Loss 0.0 0.0
Fair Value 3,645.1 5,732.4
Short- term Investments 862.3 2,345.5
Long- term Investments 2,333.3 2,821.8
Level 2    
Debt Securities, Available-for-sale [Line Items]    
Cash and cash equivalents 0.0 1.0
Total 640.8 498.4
Gross Unrealized Gains 0.0 2.3
Gross Unrealized Losses (14.0) (0.8)
Allowance for Credit Loss (0.1) (0.1)
Fair Value 626.7 499.8
Short- term Investments 202.1 221.4
Long- term Investments 424.6 277.4
Level 2 | Corporate debt securities    
Debt Securities, Available-for-sale [Line Items]    
Cash and cash equivalents 0.0 1.0
Total 459.5 167.8
Gross Unrealized Gains 0.0 0.0
Gross Unrealized Losses (13.4) (0.7)
Allowance for Credit Loss (0.1) (0.1)
Fair Value 446.0 167.0
Short- term Investments 33.1 78.4
Long- term Investments 412.9 87.6
Level 2 | U.S. government agencies    
Debt Securities, Available-for-sale [Line Items]    
Cash and cash equivalents 0.0 0.0
Total 181.3 330.6
Gross Unrealized Gains 0.0 2.3
Gross Unrealized Losses (0.6) (0.1)
Allowance for Credit Loss 0.0 0.0
Fair Value 180.7 332.8
Short- term Investments 169.0 143.0
Long- term Investments $ 11.7 $ 189.8