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Convertible Senior Notes - Narrative (Details) - USD ($)	1 Months Ended			9 Months Ended
	Sep. 30, 2020	Mar. 31, 2020	Mar. 31, 2018	Sep. 30, 2022
Convertible Debt
Debt Instrument [Line Items]
Debt redemption price (percentage)				100.00%
2023 Notes | Convertible Debt
Debt Instrument [Line Items]
Principal			$ 460,000,000
Debt instrument, interest rate (percentage)			0.00%
Proceeds from issuance debt, net of discounts and issuance costs			$ 449,500,000
2025 Notes
Debt Instrument [Line Items]
Principal				$ 1,000,000,000
2025 Notes | Convertible Debt
Debt Instrument [Line Items]
Principal		$ 1,000,000,000
Debt instrument, interest rate (percentage)		0.00%
Proceeds from issuance debt, net of discounts and issuance costs		$ 986,500,000
2026 Notes
Debt Instrument [Line Items]
Principal				$ 650,000,000
2026 Notes | Convertible Debt
Debt Instrument [Line Items]
Principal	$ 650,000,000
Debt instrument, interest rate (percentage)	0.00%
Proceeds from issuance debt, net of discounts and issuance costs	$ 640,200,000

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Face (par) amount of debt instrument at time of issuance.

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