Long-term Debt - Senior Unsecured Notes, Unsecured Convertible Notes, and Covenants (Details)	1 Months Ended	12 Months Ended
	May 31, 2020 USD ($) $ / shares	Dec. 31, 2023 USD ($) shares	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Jul. 01, 2021 USD ($)	Dec. 31, 2020 USD ($)	Jan. 19, 2017 USD ($)
Debt Instrument [Line Items]
(Decrease) increase from adoption		$ 3,199,600,000	$ 3,596,600,000	$ 4,097,100,000		$ 2,655,800,000
Additional Paid-In Capital
Debt Instrument [Line Items]
(Decrease) increase from adoption		4,436,600,000	4,220,200,000	4,239,600,000		3,167,200,000
Retained Earnings (Accumulated Deficit)
Debt Instrument [Line Items]
(Decrease) increase from adoption		$ (335,500,000)	154,500,000	(86,500,000)		$ (507,300,000)
Cumulative Effect, Period of Adoption, Adjustment
Debt Instrument [Line Items]
(Decrease) increase from adoption				(69,300,000)
Cumulative Effect, Period of Adoption, Adjustment | Additional Paid-In Capital
Debt Instrument [Line Items]
(Decrease) increase from adoption				(88,200,000)
Cumulative Effect, Period of Adoption, Adjustment | Retained Earnings (Accumulated Deficit)
Debt Instrument [Line Items]
(Decrease) increase from adoption				$ 18,900,000
Debt Instrument, Redemption, Period One
Debt Instrument [Line Items]
Threshold percentage of stock price	130.00%
Debt Instrument, Redemption, Period Two
Debt Instrument [Line Items]
Threshold percentage of stock price	98.00%
Debt Instrument, Redemption, Period Three
Debt Instrument [Line Items]
Threshold percentage of stock price	100.00%
5.625% Notes due 2027 | Senior notes
Debt Instrument [Line Items]
Debt principal amount							$ 400,000,000
Interest rate		5.625%					5.625%
4.125% Notes due 2029 | Senior notes
Debt Instrument [Line Items]
Debt principal amount					$ 400,000,000
Interest rate		4.125%			4.125%
2.75% Convertible Notes due 2026 | Senior notes | Debt Instrument, Redemption, Period One
Debt Instrument [Line Items]
Debt Instrument, convertible, conversion ratio	0.042735
2.75% Convertible Notes due 2026 | Senior notes | Debt Instrument, Redemption, Period Three
Debt Instrument [Line Items]
Debt Instrument, convertible, conversion ratio	0.0555555
2.75% Convertible Notes due 2026 | Convertible Notes
Debt Instrument [Line Items]
Debt principal amount	$ 330,500,000	$ 330,500,000	330,500,000
Interest rate	2.75%	2.75%
Proceeds from issuance of long-term debt, net of discounts	$ 322,200,000
Conversion price (in dollars per share) | $ / shares	$ 23.40
Number of shares issued upon conversion (in shares) | shares		18,360,815
Amount if-converted value exceeds its principal amount		$ 147,200,000
Debt conversion, converted instrument, amount		$ 0	$ 0
Carrying amount of equity component	$ 91,800,000
Debt issuance costs	10,200,000
Effective yield		3.329%
Remaining term		2 years 4 months 24 days
Convertible Notes Due 2026, Liability Component | Convertible Notes
Debt Instrument [Line Items]
Debt issuance costs	6,600,000
Convertible Notes Due 2026, Equity Component | Convertible Notes
Debt Instrument [Line Items]
Debt issuance costs	$ 3,600,000