XML 67 R56.htm IDEA: XBRL DOCUMENT v3.21.1
DEBT - Convertible Senior Notes due in 2026 Narrative (Details)
$ / shares in Units, shares in Millions
3 Months Ended
Mar. 01, 2021
USD ($)
trading_day
$ / shares
shares
Mar. 09, 2020
trading_day
Mar. 31, 2021
USD ($)
Mar. 31, 2020
USD ($)
Mar. 12, 2021
USD ($)
Debt Instrument [Line Items]          
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        
Debt issuance costs 10,000,000.0        
Unamortized debt issuance costs 8,100,000   $ 7,900,000    
Debt issuance costs, allocated to capital $ 2,000,000.0        
Effective percentage rate     4.44%    
Unamortized discount     $ 121,700,000    
Remaining discount amortization period     4 years 10 months 24 days    
Conversion shares (in shares) | shares 2.1        
Payment for bonds hedge $ 124,600,000        
Proceeds from sale of warrants $ 97,400,000        
Warrants issued, strike price (in USD per share) | $ / shares $ 397.91        
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