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Payments for Repurchase of Convertible Notes

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Shares Received From Exercise Of Note Hedge

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Exercise price per share or per unit of warrants or rights outstanding.

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The number of shares issued in exchange for the original debt being converted in a noncash (or part noncash) transaction. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or payments in the period.

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Percentage points added to the reference rate to compute the variable rate on the debt instrument.

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The price per share of the conversion feature embedded in the debt instrument.

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Minimum percentage of common stock price to conversion price of convertible debt instruments to determine eligibility of conversion.

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

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Contractual interest rate for funds borrowed, under the debt agreement.

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Percentage price of original principal amount of debt at which debt can be redeemed by the issuer.

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Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The amount of the liability for the conversion option reclassified to stockholders' equity when the embedded option no longer required separation from the host instrument.

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Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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The cash inflow from the issuance of a long-term debt instrument which can be exchanged for a specified amount of another security, typically the entity's common stock, at the option of the issuer or the holder.

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Debt - Narrative (Details)		1 Months Ended		12 Months Ended
Debt - Narrative (Details)	Oct. 01, 2021 USD ($)	May 31, 2020 USD ($) shares	Nov. 30, 2018 USD ($) d $ / shares shares	Dec. 31, 2021 USD ($) d trading_day shares	Dec. 31, 2020 USD ($) shares	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Jun. 30, 2017 USD ($)
Debt Instrument [Line Items]
Repurchase of convertible notes		$ 282,600,000		$ 0	$ 282,600,000	$ 0
Repurchase and conversions of Notes (in shares) \| shares		1,953,067
Loss on extinguishment of debt				(1,500,000)	(5,900,000)	0
Proceeds from issuance of convertible notes, net of issuance costs				0	1,188,800,000	$ 0
Equity component of 2025 Notes issuance, net of issuance costs					289,400,000
Senior Notes
Debt Instrument [Line Items]
Total principal amount				1,999,800,000	2,057,500,000
Senior Notes \| Convertible Notes due 2023
Debt Instrument [Line Items]
Total principal amount			$ 850,000,000	792,300,000	850,000,000.0
Interest rate on convertible notes (as a percent)			0.75%
Principal amount exercised				57,700,000
Loss on extinguishment of debt				$ 1,400,000
Proceeds from issuance of convertible notes, net of issuance costs			$ 836,600,000
Conversion ratio			0.0060869
Conversion price of convertible notes (USD per share) \| $ / shares			$ 164.29
Benefit of note hedge upon conversions of 2023 Notes (in shares) \| shares				241,845
Holder's repurchase price percentage in event of fundamental change (as a percent)				100.00%
Number of trading days \| d			60
Proportion of conversion price (as a percent)				130.00%
Redemption price (as a percent)				100.00%
Stock counterparties to acquire with warrants purchased (shares) \| shares			5,200,000
Proceeds from sale of warrants			$ 183,800,000
Exercise price of warrants or rights (USD per share) \| $ / shares			$ 198.38
Senior Notes \| Convertible Notes due 2022
Debt Instrument [Line Items]
Total principal amount		$ 260,000,000						$ 400,000,000
Interest rate on convertible notes (as a percent)								0.75%
Principal amount exercised				$ 140,000,000
Loss on extinguishment of debt					5,900,000
Senior Notes \| Convertible Notes due 2025
Debt Instrument [Line Items]
Total principal amount		$ 1,210,000,000		$ 1,207,500,000	1,207,500,000
Interest rate on convertible notes (as a percent)		0.25%
Proceeds from issuance of convertible notes, net of issuance costs		$ 1,190,000,000
Conversion ratio		600.42	0.0016655
Recognized additional paid-in capital from cash conversion option					$ 289,400,000
Holder's repurchase price percentage in event of fundamental change (as a percent)				100.00%
Proportion of conversion price (as a percent)				130.00%
Redemption price (as a percent)				100.00%
Senior Notes \| Convertible Notes due 2025 \| Maximum
Debt Instrument [Line Items]
Conversion ratio			0.0023720
Line of Credit
Debt Instrument [Line Items]
Term of debt instrument	5 years
Maximum borrowing capacity of revolving credit agreement				$ 200,000,000.0
Option to increase revolving line of credit	$ 500,000,000
Line of Credit \| Minimum
Debt Instrument [Line Items]
Unused capacity fee (as a percent)				0.175%
Line of Credit \| Maximum
Debt Instrument [Line Items]
Unused capacity fee (as a percent)				0.25%
Common Stock
Debt Instrument [Line Items]
Repurchase and conversions of Notes (in shares) \| shares				400,000	3,400,000
Benefit of note hedge upon conversions of 2023 Notes (in shares) \| shares				(200,000)
Common Stock \| Senior Notes \| Convertible Notes due 2023
Debt Instrument [Line Items]
Repurchase and conversions of Notes (in shares) \| shares				350,778
Treasury stock reissued (in shares) \| shares				198,647
Common Stock \| Senior Notes \| Convertible Notes due 2022
Debt Instrument [Line Items]
Repurchase and conversions of Notes (in shares) \| shares				1,412,497
Additional Paid-In Capital
Debt Instrument [Line Items]
Equity component of 2025 Notes issuance, net of issuance costs					$ 289,400,000
Additional Paid-In Capital \| Senior Notes \| Convertible Notes due 2023
Debt Instrument [Line Items]
Recognized additional paid-in capital from cash conversion option							$ 171,600,000
Debt Instrument Conversion Term One \| Senior Notes \| Convertible Notes due 2023 \| Minimum
Debt Instrument [Line Items]
Number of trading days \| d				20
Proportion of applicable conversion price (as a percent)				130.00%
Debt Instrument Conversion Term One \| Senior Notes \| Convertible Notes due 2023 \| Maximum
Debt Instrument [Line Items]
Number of trading days \| d				30
Debt Instrument Conversion Term One \| Senior Notes \| Convertible Notes due 2025 \| Minimum
Debt Instrument [Line Items]
Number of trading days \| trading_day				20
Proportion of applicable conversion price (as a percent)				130.00%
Debt Instrument Conversion Term One \| Senior Notes \| Convertible Notes due 2025 \| Maximum
Debt Instrument [Line Items]
Number of trading days \| trading_day				30
Debt Instrument Conversion Term Two \| Senior Notes \| Convertible Notes due 2023
Debt Instrument [Line Items]
Number of trading days \| d				5
Debt Instrument Conversion Term Two \| Senior Notes \| Convertible Notes due 2023 \| Maximum
Debt Instrument [Line Items]
Number of trading days \| d				5
Proportion of applicable conversion price (as a percent)				98.00%
Debt Instrument Conversion Term Two \| Senior Notes \| Convertible Notes due 2025
Debt Instrument [Line Items]
Number of trading days \| trading_day				5
Debt Instrument Conversion Term Two \| Senior Notes \| Convertible Notes due 2025 \| Maximum
Debt Instrument [Line Items]
Number of trading days \| trading_day				5
Proportion of applicable conversion price (as a percent)				98.00%
Designated as Hedging Instrument \| Senior Notes \| Convertible Notes due 2023
Debt Instrument [Line Items]
Stock issued upon conversion of senior notes (shares) \| shares			5,200,000
Equity component of 2025 Notes issuance, net of issuance costs			$ 218,900,000
Base Rate \| Line of Credit \| Minimum
Debt Instrument [Line Items]
Basis spread on variable rate (as a percent)				0.375%
Base Rate \| Line of Credit \| Maximum
Debt Instrument [Line Items]
Basis spread on variable rate (as a percent)				1.00%
London Interbank Offered Rate (LIBOR) \| Line of Credit
Debt Instrument [Line Items]
Basis spread on variable rate (as a percent)				1.00%
London Interbank Offered Rate (LIBOR) \| Line of Credit \| Minimum
Debt Instrument [Line Items]
Basis spread on variable rate (as a percent)				1.375%
London Interbank Offered Rate (LIBOR) \| Line of Credit \| Maximum
Debt Instrument [Line Items]
Basis spread on variable rate (as a percent)				2.00%
Simple Risk Free Rate (RFR) \| Line of Credit
Debt Instrument [Line Items]
Basis spread on variable rate (as a percent)				0.0326%
Simple Risk Free Rate (RFR) \| Line of Credit \| Minimum
Debt Instrument [Line Items]
Basis spread on variable rate (as a percent)				1.375%
Simple Risk Free Rate (RFR) \| Line of Credit \| Maximum
Debt Instrument [Line Items]
Basis spread on variable rate (as a percent)				2.00%
Federal Reserve Bank Of New York Rate (NYFRB) \| Line of Credit
Debt Instrument [Line Items]
Basis spread on variable rate (as a percent)				0.50%