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LONG-TERM DEBT (Tables)
12 Months Ended
Dec. 31, 2021
Debt Disclosure [Abstract]  
Schedule of Debt The following is a summary of the 2026 Notes as of December 31, 2021 (in millions):

Fair Value
Principal AmountUnamortized Debt Discounts and Issuance CostsNet Carrying Amount AmountLevel
1.25% convertible senior notes due in December 2026
$2,012.5 $25.7 $1,986.8 $1,984.6 Level 2