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Debt - Details of Notes (Details) - Convertible Debt
convertible_unit in Millions
1 Months Ended 3 Months Ended
Mar. 31, 2021
$ / shares
May 31, 2020
Aug. 31, 2018
Mar. 31, 2021
convertible_unit
$ / shares
2023 Notes        
Debt Instrument [Line Items]        
Interest Rate 1.25%     1.25%
Effective Interest Rate 1.86%     1.86%
Initial Conversion Rate per $1,000 Principal     0.0240  
Initial Conversion Price (in dollars per share) | $ / shares $ 41,590     $ 41,590
Number of shares (in millions) (in shares) | convertible_unit       1.1
2025 Notes        
Debt Instrument [Line Items]        
Interest Rate 2.25%     2.25%
Effective Interest Rate 2.88%     2.88%
Initial Conversion Rate per $1,000 Principal   0.0163875    
Initial Conversion Price (in dollars per share) | $ / shares $ 61,020.00     $ 61,020.00
Number of shares (in millions) (in shares) | convertible_unit       3.8
2027 Notes        
Debt Instrument [Line Items]        
Interest Rate 0.25%     0.25%
Effective Interest Rate 0.67%     0.67%
Initial Conversion Rate per $1,000 Principal 0.0096734      
Initial Conversion Price (in dollars per share) | $ / shares $ 103,380     $ 103,380
Number of shares (in millions) (in shares) | convertible_unit       5.8