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Debt - Summary of Conversion and Redemption Options and Details Related to Capped Call Confirmations (Details) - Convertible Debt
9 Months Ended
Sep. 30, 2020
$ / shares
1.375% convertible senior notes due 2026  
Debt Instrument [Line Items]  
Debt instrument, conversion rate shares 0.0229830
Conversion Price per Share (usd per share) $ 43.51
Initial cap price (usd per share) $ 80.5750
Cap Price Premium 150.00%
2.75% convertible senior notes due 2025  
Debt Instrument [Line Items]  
Debt instrument, conversion rate shares 0.0148810
Conversion Price per Share (usd per share) $ 67.20
0.75% convertible senior notes due 2024  
Debt Instrument [Line Items]  
Debt instrument, conversion rate shares 0.0229830
Conversion Price per Share (usd per share) $ 43.51
Initial cap price (usd per share) $ 72.5175
Cap Price Premium 125.00%
1.50% convertible senior notes due 2023  
Debt Instrument [Line Items]  
Debt instrument, conversion rate shares 0.0127592
Conversion Price per Share (usd per share) $ 78.37
Initial cap price (usd per share) $ 105.45
Cap Price Premium 85.00%
2.00% convertible senior notes due 2021  
Debt Instrument [Line Items]  
Debt instrument, conversion rate shares 0.0190985
Conversion Price per Share (usd per share) $ 52.36
Initial cap price (usd per share) $ 69.19
Cap Price Premium 85.00%