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FINANCIAL INSTRUMENTS - Summary of Cash and Available-For-Sale Securities (Details) - USD ($)
$ in Millions
Mar. 31, 2023
Dec. 31, 2022
Debt Securities, Available-for-sale [Line Items]    
Cash and cash equivalents $ 2,143.0 $ 1,581.2
Total 4,586.8  
Gross Unrealized Gains 0.0 0.0
Gross Unrealized Losses (150.1) (198.5)
Allowance for Credit Loss (1.1) (1.1)
Fair Value 4,435.6  
Short- term Investments 2,549.2 2,536.7
Long- term Investments 1,886.4 2,623.6
Total assets measured at fair value, amortized cost 6,729.8 6,941.1
Total assets measured at fair value, fair value 6,578.6 6,741.5
Cash    
Debt Securities, Available-for-sale [Line Items]    
Cash and cash equivalents 605.2 497.2
Fair Value 605.2 497.2
Level 1    
Debt Securities, Available-for-sale [Line Items]    
Cash and cash equivalents 1,537.8 1,084.0
Total 3,816.8 3,799.2
Gross Unrealized Gains 0.0 0.0
Gross Unrealized Losses (69.7) (96.6)
Allowance for Credit Loss 0.0 0.0
Fair Value 3,747.1 3,702.6
Short- term Investments 1,522.6 1,542.4
Long- term Investments 686.7 1,076.2
Level 1 | Money market funds    
Debt Securities, Available-for-sale [Line Items]    
Cash and cash equivalents 1,537.8 1,084.0
Fair Value 1,537.8 1,084.0
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 0.0 0.0
Total 2,279.0 2,715.2
Gross Unrealized Gains 0.0 0.0
Gross Unrealized Losses (69.7) (96.6)
Allowance for Credit Loss 0.0 0.0
Fair Value 2,209.3 2,618.6
Short- term Investments 1,522.6 1,542.4
Long- term Investments 686.7 1,076.2
Level 2    
Debt Securities, Available-for-sale [Line Items]    
Cash and cash equivalents 0.0 0.0
Total 2,307.8 2,644.7
Gross Unrealized Gains 0.0 0.0
Gross Unrealized Losses (80.4) (101.9)
Allowance for Credit Loss (1.1) (1.1)
Fair Value 2,226.3 2,541.7
Short- term Investments 1,026.6 994.3
Long- term Investments 1,199.7 1,547.4
Level 2 | Commercial paper    
Debt Securities, Available-for-sale [Line Items]    
Cash and cash equivalents   0.0
Total   20.0
Gross Unrealized Gains   0.0
Gross Unrealized Losses   0.0
Allowance for Credit Loss   0.0
Fair Value   20.0
Short- term Investments   20.0
Long- term Investments   0.0
Level 2 | Corporate debt securities    
Debt Securities, Available-for-sale [Line Items]    
Cash and cash equivalents 0.0 0.0
Total 1,789.2 2,022.0
Gross Unrealized Gains 0.0 0.0
Gross Unrealized Losses (60.3) (76.0)
Allowance for Credit Loss (1.1) (1.1)
Fair Value 1,727.8 1,944.9
Short- term Investments 769.6 651.8
Long- term Investments 958.2 1,293.1
Level 2 | U.S. government agencies    
Debt Securities, Available-for-sale [Line Items]    
Cash and cash equivalents 0.0 0.0
Total 400.4 447.2
Gross Unrealized Gains 0.0 0.0
Gross Unrealized Losses (15.3) (19.9)
Allowance for Credit Loss 0.0 0.0
Fair Value 385.1 427.3
Short- term Investments 210.5 247.8
Long- term Investments 174.6 179.5
Level 2 | Municipal securities    
Debt Securities, Available-for-sale [Line Items]    
Cash and cash equivalents 0.0 0.0
Total 118.2 155.5
Gross Unrealized Gains 0.0 0.0
Gross Unrealized Losses (4.8) (6.0)
Allowance for Credit Loss 0.0 0.0
Fair Value 113.4 149.5
Short- term Investments 46.5 74.7
Long- term Investments $ 66.9 $ 74.8