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Long-Term Debt - Convertible Senior Notes due 2024 - Additional Information (Detail) |  | 1 Months Ended | 3 Months Ended | 6 Months Ended | 12 Months Ended |  |
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Mar. 15, 2024 USD ($) $ / shares | Aug. 31, 2023 USD ($) | Mar. 31, 2018 USD ($) $ / shares | Jun. 30, 2024 USD ($) | Mar. 31, 2024 | Sep. 30, 2023 USD ($) | Jun. 30, 2023 USD ($) | Dec. 31, 2022 USD ($) | Jun. 30, 2024 USD ($) | Jun. 30, 2023 USD ($) | Dec. 31, 2022 USD ($) | Dec. 31, 2023 USD ($) | Jan. 01, 2022 USD ($)
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Outstanding principal amount |  |  |  | $ 2,422,500,000 |  |  |  |  | $ 2,422,500,000 |  |  |  |
Long-term debt |  |  |  | 2,342,700,000 |  |  |  |  | 2,342,700,000 |  |  | $ 2,562,400,000 |
Paid-in capital in excess of par value |  |  |  | 253,400,000 |  |  |  |  | 253,400,000 |  |  | 233,900,000 |
Retained earnings (accumulated deficit) |  |  |  | (1,033,300,000) |  |  |  |  | (1,033,300,000) |  |  | (1,062,300,000) |
Gain on extinguishment of debt |  |  |  |  |  |  |  |  | (10,500,000) | $ 0 |  |  |
Interest expense |  |  |  | $ 60,400,000 |  |  | $ 41,100,000 |  | $ 102,000,000 | 82,900,000 |  |  |
2.625% Convertible Senior Notes Due 2024 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate principal amount of senior notes issued |  | $ 65,500,000 | $ 550,000,000 |  |  |  |  | $ 277,500,000 |  |  | $ 277,500,000 |  |
Convertible notes, interest rate |  |  | 2.625% | 2.625% |  |  |  |  | 2.625% |  |  |  |
Convertible notes maturity |  |  | Mar. 15, 2024 |  | Mar. 15, 2024 |  |  |  | Mar. 15, 2024 |  |  |  |
Convertible notes, conversion feature |  |  |  |  |  |  |  |  | On and after December 15, 2023, holders could convert their 2024 Convertible Notes at any time, regardless of the circumstances. In December 2021, the Company made an irrevocable election under the indenture governing the 2024 Convertible Notes to require the principal portion of the 2024 Convertible Notes to be settled in cash and any excess in shares or cash. |  |  |  |
Principal amount of convertible notes | $ 1,000,000,000 |  |  |  |  |  |  |  | $ 1,000,000,000 |  |  |  |
Convertible notes conversion rate | 160,467.0000 |  | 16.0056 |  |  |  |  |  |  |  |  |  |
Convertible notes conversion price | $ / shares | $ 62.32 |  | $ 62.48 |  |  |  |  |  |  |  |  |  |
Outstanding principal amount |  |  | $ 550,000,000 |  |  |  |  |  |  |  |  | 197,000,000 |
Amortization of deferred financing costs |  |  |  |  |  |  | 200,000 |  | 200,000 | 500,000 |  |  |
Long-term debt |  |  | 410,100,000 |  |  |  |  |  |  |  |  |  | $ 59,100,000
Paid-in capital in excess of par value |  |  | $ 139,900,000 |  |  |  |  |  |  |  |  |  |
Effective interest rate on convertible notes |  |  | 8.40% |  |  |  |  |  |  |  |  |  | 3.10%
Deferred financing costs |  |  | $ 12,900,000 |  |  |  |  |  |  |  |  |  |
Deferred financing costs recorded as additional paid-in-capital in excess of par value |  |  | 3,300,000 |  |  |  |  |  |  |  |  |  |
Additional Paid in Capital |  |  |  |  |  |  |  |  |  |  |  |  | $ 136,700,000
Repurchase of convertible notes |  |  |  |  |  |  |  |  |  |  | 287,500,000 |  |
Debt instrument , Purchase Price |  | 65,100,000 |  |  |  |  |  |  |  |  | 274,900,000 |  |
Accrued interest |  | 800,000 |  |  |  |  |  | 1,700,000 |  |  | 1,700,000 |  |
Reduction to long term debt representing carrying value of convertible debt | $ 197,000,000 | $ 65,300,000 |  |  |  |  |  |  |  |  | $ 286,000,000 |  |
Gain on extinguishment of debt |  |  |  |  |  | $ 1,000,000 |  | $ 12,800,000 |  |  |  |  |
Repayment of debt | 197,000,000 |  |  |  |  |  |  |  |  |  |  |  |
Accrued interest on debt | $ 2,600,000 |  |  |  |  |  |  |  |  |  |  |  |
Unamortized debt discount and debt issuance costs |  |  |  |  |  |  |  |  |  |  |  | 200,000 |
Convertible senior notes, carrying value |  |  |  | $ 0 |  |  |  |  | 0 |  |  | 196,800,000 |
Fair value of notes |  |  |  |  |  |  |  |  |  |  |  | $ 196,200,000 |
Interest expense |  |  |  |  |  |  | $ 2,000,000 |  | $ 1,200,000 | $ 3,800,000 |  |  |
2.625% Convertible Senior Notes Due 2024 [Member] | Debt Issuance Costs [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred financing costs |  |  | $ 9,600,000 |  |  |  |  |  |  |  |  |  |
ASU 2020-06 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Retained earnings (accumulated deficit) |  |  |  |  |  |  |  |  |  |  |  |  | $ 77,600,000

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