v3.26.1
FINANCIAL INSTRUMENTS - Summary of Cash and Available-For-Sale Securities (Details) - USD ($)
$ in Millions
Jun. 30, 2026
Dec. 31, 2025
Debt Securities, Available-for-sale [Line Items]    
Cash and cash equivalents $ 2,760.4 $ 3,368.0
Total 6,237.4  
Gross Unrealized Gains 6.3 41.3
Gross Unrealized Losses (21.5) (1.7)
Allowance for Credit Loss (0.1) (0.1)
Fair Value 6,222.1  
Short- term Investments 2,455.8 2,566.9
Long- term Investments 3,409.3 3,099.2
Total assets measured at fair value, amortized cost 8,640.8 8,994.6
Total assets measured at fair value, fair value 8,625.5 9,034.1
Cash    
Debt Securities, Available-for-sale [Line Items]    
Cash and cash equivalents 601.0 514.9
Fair Value 601.0 514.9
Level 1    
Debt Securities, Available-for-sale [Line Items]    
Cash and cash equivalents 2,156.2 2,852.1
Total 7,250.5 7,981.3
Gross Unrealized Gains 5.9 39.0
Gross Unrealized Losses (15.2) (0.9)
Allowance for Credit Loss 0.0 0.0
Fair Value 7,241.2 8,019.4
Short- term Investments 2,163.7 2,345.5
Long- term Investments 2,921.3 2,821.8
Level 1 | Money market funds    
Debt Securities, Available-for-sale [Line Items]    
Cash and cash equivalents 1,802.4 2,287.0
Fair Value 1,802.4 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 353.8 565.1
Total 5,448.1 5,694.3
Gross Unrealized Gains 5.9 39.0
Gross Unrealized Losses (15.2) (0.9)
Allowance for Credit Loss 0.0 0.0
Fair Value 5,438.8 5,732.4
Short- term Investments 2,163.7 2,345.5
Long- term Investments 2,921.3 2,821.8
Level 2    
Debt Securities, Available-for-sale [Line Items]    
Cash and cash equivalents 3.2 1.0
Total 789.3 498.4
Gross Unrealized Gains 0.4 2.3
Gross Unrealized Losses (6.3) (0.8)
Allowance for Credit Loss (0.1) (0.1)
Fair Value 783.3 499.8
Short- term Investments 292.1 221.4
Long- term Investments 488.0 277.4
Level 2 | Corporate debt securities    
Debt Securities, Available-for-sale [Line Items]    
Cash and cash equivalents 3.2 1.0
Total 499.6 167.8
Gross Unrealized Gains 0.0 0.0
Gross Unrealized Losses (6.0) (0.7)
Allowance for Credit Loss (0.1) (0.1)
Fair Value 493.5 167.0
Short- term Investments 52.0 78.4
Long- term Investments 438.3 87.6
Level 2 | U.S. government agencies    
Debt Securities, Available-for-sale [Line Items]    
Cash and cash equivalents 0.0 0.0
Total 289.7 330.6
Gross Unrealized Gains 0.4 2.3
Gross Unrealized Losses (0.3) (0.1)
Allowance for Credit Loss 0.0 0.0
Fair Value 289.8 332.8
Short- term Investments 240.1 143.0
Long- term Investments $ 49.7 $ 189.8