Long-Term Debt - Additional Information (Detail) - USD ($)
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1 Months Ended |
3 Months Ended |
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Jun. 30, 2017 |
Sep. 30, 2015 |
May 04, 2015 |
Feb. 15, 2017 |
Feb. 28, 2014 |
Mar. 31, 2017 |
Mar. 31, 2016 |
Mar. 31, 2014 |
Dec. 31, 2016 |
Jul. 26, 2012 |
Mar. 09, 2011 |
| Debt Instrument [Line Items] |
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| Deferred financing costs |
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$ 6,200,000
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| Interest expense |
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$ 32,500,000
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$ 26,000,000
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| Paid-in-capital in excess of par value |
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469,200,000
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$ 467,600,000
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| Long-term debt |
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2,302,800,000
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1,447,900,000
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| Convertible senior notes, carrying value of liability component |
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1,035,800,000
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1,024,800,000
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| Letters of credit issued but undrawn |
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40,000,000
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| Prepaid forward share repurchase transactions [Member] |
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| Debt Instrument [Line Items] |
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| Paid-in-capital in excess of par value |
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$ 31,900,000
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| Forward share repurchase transactions amount |
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$ 685,800,000
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685,800,000
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| Capped call transactions [Member] |
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| Debt Instrument [Line Items] |
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| Capped call transactions with financial institutions |
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123,800,000
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| Senior secured prior revolving credit facility [Member] |
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| Debt Instrument [Line Items] |
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| Credit facility, amount repaid |
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410,000,000
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| Senior secured revolving credit facility [Member] |
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| Debt Instrument [Line Items] |
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| Borrowings under the senior secured credit facility |
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0
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| Term Loan [Member] |
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| Debt Instrument [Line Items] |
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| Interest expense |
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11,200,000
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| Non-cash interest expense |
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600,000
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| Amortization of deferred financing costs |
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400,000
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| Term Loan [Member] | Level 2 [Member] |
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| Debt Instrument [Line Items] |
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| Carrying amount of Term Loan |
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1,257,300,000
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| Debt instrument, fair value |
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1,300,000,000
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| Convertible Debt [Member] |
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| Debt Instrument [Line Items] |
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| Deferred financing costs |
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26,600,000
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| Interest expense |
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16,800,000
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16,100,000
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| Non-cash interest expense |
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10,000,000
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9,400,000
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| Amortization of deferred financing costs |
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1,000,000
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$ 900,000
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| Carrying amount of Term Loan |
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1,150,000,000
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$ 1,150,000,000
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1,150,000,000
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| Aggregate principal amount of convertible senior notes issued |
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1,000,000,000
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| Additional principal amount of convertible notes |
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$ 150,000,000
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| Convertible notes, interest rate |
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2.00%
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| Convertible notes maturity |
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Aug. 15, 2019
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| Convertible notes, conversion feature |
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Holders of the Convertible Notes may convert their notes at their option under the following circumstances: (i) during any calendar quarter commencing after the calendar quarter ending March 31, 2014, if the last reported sale price of the Company’s common shares for at least 20 trading days (whether or not consecutive) in a period of 30 consecutive trading days ending on, and including, the last trading day of the immediately preceding calendar quarter exceeds 130% of the conversion price for the Convertible Notes on each applicable trading day; (ii) during the five business-day period immediately after any five consecutive trading day period, or the measurement period, in which the trading price per $1,000 principal amount of Convertible Notes for each trading day of that measurement period was less than 98% of the product of the last reported sale price of the Company’s common shares and the conversion rate for the Convertible Notes for each such day; or (iii) upon the occurrence of specified corporate events. On and after May 15, 2019, holders may convert their Convertible Notes at any time, regardless of the foregoing circumstances.
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| Convertible notes, number of trading days of threshold limit (whether or not consecutive) |
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20 days
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| Convertible notes, number of trading days of threshold limit in consecutive days |
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30 days
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| Minimum percentage of common share price over conversion price for conversion |
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130.00%
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| Principal amount of convertible notes |
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$ 1,000
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| Minimum percentage of the product of common share price and conversion rate for convertible notes |
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98.00%
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| Convertible notes initial conversion rate |
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11.5908
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| Convertible notes initial conversion price |
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$ 86.28
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$ 86.28
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| Paid-in-capital in excess of par value |
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$ 219,100,000
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5,100,000
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| Proceeds received from the issuance of the Convertible notes |
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1,150,000,000
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| Long-term debt |
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$ 930,900,000
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| Effective interest rate on convertible notes |
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6.20%
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| Unamortized debt discount and debt issuance costs |
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$ 114,200,000
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125,200,000
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| Convertible senior notes, carrying value of liability component |
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1,035,800,000
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1,024,800,000
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| Fair value of liability to convertible notes |
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$ 1,040,500,000
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$ 961,300,000
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| Convertible Debt [Member] | Debt Issuance Costs [Member] |
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| Debt Instrument [Line Items] |
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| Deferred financing costs |
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$ 21,500,000
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| Convertible Debt [Member] | Capped call transactions [Member] |
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| Debt Instrument [Line Items] |
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| Convertible notes initial conversion price |
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$ 86.28
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| Senior Secured Credit Facility [Member] |
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| Debt Instrument [Line Items] |
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| Credit facility, maximum amount |
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$ 1,450,000,000
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| Credit facility amendment date |
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May 04, 2015
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| Credit facility interest rate description |
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After March 9, 2016, the applicable interest rates on the Company’s borrowings under the Prior Credit Facility increased by 2.00% such that borrowings under the Prior Credit Facility began bearing interest at either LIBOR plus the applicable margin between 4.00% and 5.00% or the base rate plus the applicable margin between 3.00% and 4.00%
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| Deferred financing costs |
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$ 22,600,000
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| Senior secured credit facility, discount percentage |
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2.00%
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| Senior secured credit facility, discount amount |
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$ 26,000,000
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| Repayment of prior senior secured credit facility |
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$ 410,000,000
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| Line of credit facility, frequency of interest payments |
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quarterly
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| Amount required to maintain on consolidated cash and cash equivalents |
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$ 200,000,000
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| Long-term debt, weighted average interest rate |
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5.97%
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4.29%
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| Annual scheduled principal payments of debt, Remainder of 2017 |
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$ 79,300,000
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| Annual scheduled principal payments of debt, 2018 |
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100,400,000
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| Annual scheduled principal payments of debt, 2019 |
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1,247,900,000
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| Annual scheduled principal payments of debt, 2020 |
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97,800,000
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| Annual scheduled principal payments of debt, 2021 |
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97,500,000
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| Annual scheduled principal payments of debt, 2022 |
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97,500,000
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| Annual scheduled principal payments of debt, 2023 |
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$ 739,400,000
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| Senior Secured Credit Facility [Member] | Senior secured prior revolving credit facility [Member] |
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| Debt Instrument [Line Items] |
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| Line of credit facility extended maturity period |
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1 year
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| Credit facility prepayments |
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50,900,000
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| Credit facility, maximum amount |
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$ 425,000,000
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$ 700,000,000
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| Amended maturity date of credit facility |
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Mar. 09, 2017
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| Decreased amount in credit facility borrowing capacity |
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$ (39,100,000)
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(235,900,000)
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| Borrowings under the senior secured credit facility |
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410,000,000
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| Foreign currency borrowings, outstanding |
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$ 0
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$ 0
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| Senior Secured Credit Facility [Member] | Senior secured revolving credit facility [Member] |
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| Debt Instrument [Line Items] |
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| Credit facility, maximum amount |
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$ 150,000,000
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| Credit facility, maturity date |
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Feb. 15, 2022
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| Credit facility LIBOR minimum floor rate interest |
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0.75%
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| Line of Credit Facility, Unused Capacity, Commitment Fee Percentage |
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0.50%
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| Senior Secured Credit Facility [Member] | Prior Term Loan [Member] |
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| Debt Instrument [Line Items] |
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| Credit facility prepayments |
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$ 20,300,000
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| Credit facility, maximum amount |
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$ 500,000,000
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| Credit facility, amount repaid |
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$ 229,700,000
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| Senior Secured Credit Facility [Member] | Term Loan [Member] |
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| Debt Instrument [Line Items] |
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| Credit facility, maximum amount |
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$ 1,300,000,000
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| Credit facility, maturity date |
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Feb. 15, 2023
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| Borrowings under the senior secured credit facility |
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$ 1,300,000,000
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| Senior Secured Credit Facility [Member] | LIBOR [Member] | Senior secured prior revolving credit facility [Member] |
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| Debt Instrument [Line Items] |
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| Credit facility LIBOR minimum floor rate interest |
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0.25%
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| Senior Secured Credit Facility [Member] | Base Rate [Member] |
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| Debt Instrument [Line Items] |
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| Variable rate basis |
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Facility increased by 2.00% such that borrowings under the Prior Credit Facility began bearing interest at either LIBOR plus the applicable margin between 4.00% and 5.00% or the base rate plus the applicable margin between 3.00% and 4.00%
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| Base rate interest rate floor |
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1.75%
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| Senior Secured Credit Facility [Member] | Base Rate [Member] | Term Loan [Member] |
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| Debt Instrument [Line Items] |
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| Interest rate spread on variable rate |
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4.50%
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| Senior Secured Credit Facility [Member] | Eurodollar [Member] | Term Loan [Member] |
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| Debt Instrument [Line Items] |
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| Interest rate spread on variable rate |
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5.50%
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| Senior Secured Credit Facility [Member] | Federal Funds Rate [Member] |
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| Debt Instrument [Line Items] |
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| Interest rate spread on variable rate |
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0.50%
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| Senior Secured Credit Facility [Member] | Adjusted LIBOR [Member] |
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| Debt Instrument [Line Items] |
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| Interest rate spread on variable rate |
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1.00%
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| Until March 9, 2016 [Member] | Senior Secured Credit Facility [Member] |
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| Debt Instrument [Line Items] |
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| Interest rate spread on variable rate increase by percentage |
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0.50%
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| After March 9, 2016 [Member] | Senior Secured Credit Facility [Member] |
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| Debt Instrument [Line Items] |
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| Interest rate increased by percentage |
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2.00%
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| After March 9, 2016 [Member] | Senior Secured Credit Facility [Member] | LIBOR [Member] | Minimum [Member] |
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| Debt Instrument [Line Items] |
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| Interest rate spread on variable rate |
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4.00%
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| After March 9, 2016 [Member] | Senior Secured Credit Facility [Member] | LIBOR [Member] | Maximum [Member] |
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| Debt Instrument [Line Items] |
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| Interest rate spread on variable rate |
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5.00%
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| After March 9, 2016 [Member] | Senior Secured Credit Facility [Member] | Base Rate [Member] | Minimum [Member] |
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| Debt Instrument [Line Items] |
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| Interest rate spread on variable rate |
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3.00%
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| After March 9, 2016 [Member] | Senior Secured Credit Facility [Member] | Base Rate [Member] | Maximum [Member] |
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| Debt Instrument [Line Items] |
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| Interest rate spread on variable rate |
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4.00%
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| Until August 15, 2017 [Member] | Senior Secured Credit Facility [Member] | Base Rate [Member] | Senior secured revolving credit facility [Member] |
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| Debt Instrument [Line Items] |
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| Interest rate spread on variable rate |
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3.75%
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| Until August 15, 2017 [Member] | Senior Secured Credit Facility [Member] | Eurodollar [Member] | Senior secured revolving credit facility [Member] |
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| Debt Instrument [Line Items] |
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| Interest rate spread on variable rate |
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4.75%
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| Scenario Leverage Ratio One [Member] | Senior Secured Credit Facility [Member] | Base Rate [Member] | Senior secured revolving credit facility [Member] | After August 15, 2017 [Member] |
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| Debt Instrument [Line Items] |
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| Interest rate spread on variable rate |
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|
3.50%
|
|
|
|
|
|
|
|
| Scenario Leverage Ratio One [Member] | Senior Secured Credit Facility [Member] | Eurodollar [Member] | Senior secured revolving credit facility [Member] | After August 15, 2017 [Member] |
|
|
|
|
|
|
|
|
|
|
|
| Debt Instrument [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
| Interest rate spread on variable rate |
|
|
|
4.50%
|
|
|
|
|
|
|
|
| Scenario Leverage Ratio Two [Member] | Senior Secured Credit Facility [Member] | Base Rate [Member] | Senior secured revolving credit facility [Member] | After August 15, 2017 [Member] |
|
|
|
|
|
|
|
|
|
|
|
| Debt Instrument [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
| Interest rate spread on variable rate |
|
|
|
3.75%
|
|
|
|
|
|
|
|
| Scenario Leverage Ratio Two [Member] | Senior Secured Credit Facility [Member] | Eurodollar [Member] | Senior secured revolving credit facility [Member] | After August 15, 2017 [Member] |
|
|
|
|
|
|
|
|
|
|
|
| Debt Instrument [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
| Interest rate spread on variable rate |
|
|
|
4.75%
|
|
|
|
|
|
|
|
| Scenario, Forecast | Term Loan [Member] |
|
|
|
|
|
|
|
|
|
|
|
| Debt Instrument [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
| Quarterly periodic payment, Principal |
$ 24,400,000
|
|
|
|
|
|
|
|
|
|
|