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DEBT - Convertible Senior Notes due in 2026 Narrative (Details)
$ / shares in Units, shares in Millions
6 Months Ended
Mar. 01, 2021
USD ($)
trading_day
$ / shares
shares
Jun. 30, 2021
USD ($)
Jun. 30, 2020
USD ($)
Mar. 12, 2021
USD ($)
Dec. 31, 2020
USD ($)
Debt Instrument [Line Items]          
Deferred taxes   $ 130,571,000     $ 92,904,000
Payment for bonds hedge   286,235,000 $ 89,056,000    
Proceeds from sale of warrants   220,800,000 $ 71,552,000    
Convertible Notes | Convertible Senior Notes Due 2026          
Debt Instrument [Line Items]          
Debt instrument face amount $ 575,000,000.0     $ 57,500,000  
Interest rate 0.00%        
Proceeds from convertible debt $ 623,000,000.0        
Conversion ratio 0.0032523        
Debt conversion price (in USD per share) | $ / shares $ 307.47        
Convertible note, liability component $ 509,000,000.0        
Convertible note, equity component 123,500,000        
Deferred taxes   40,000,000.0      
Debt issuance costs 10,000,000.0        
Unamortized debt issuance costs 8,000,000.0 $ 7,500,000      
Debt issuance costs, allocated to capital $ 2,000,000.0        
Effective percentage rate   4.44%      
Unamortized discount   $ 116,100,000      
Remaining discount amortization period   4 years 8 months 12 days      
Conversion shares (in shares) | shares 2.1        
Payment for bonds hedge $ 124,600,000        
Warrants issued, strike price (in USD per share) | $ / shares $ 397.91        
Proceeds from sale of warrants $ 97,400,000        
Convertible Notes | Convertible Senior Notes Due 2026 | Discount rate          
Debt Instrument [Line Items]          
Measurement input 0.0444        
Period One | Convertible Notes | Convertible Senior Notes Due 2026          
Debt Instrument [Line Items]          
Threshold percentage 130.00%        
Stock trigger price (in USD per share) | $ / shares $ 399.71        
Number of threshold trading days | trading_day 20        
Number of consecutive trading days | trading_day 30        
Measurement period percentage of stock price trigger 98.00%        
Period Two | Convertible Notes | Convertible Senior Notes Due 2026          
Debt Instrument [Line Items]          
Threshold percentage 100.00%        
Number of consecutive trading days | trading_day 5        
Business day period after measurement period 5 days