Annual report pursuant to Section 13 and 15(d)

Long-Term Debt - Additional Information (Detail)

v3.10.0.1
Long-Term Debt - Additional Information (Detail)
1 Months Ended 3 Months Ended 12 Months Ended
Jan. 01, 2019
USD ($)
Aug. 16, 2018
USD ($)
Apr. 24, 2018
Feb. 15, 2017
USD ($)
Mar. 09, 2016
USD ($)
May 04, 2015
Aug. 31, 2018
USD ($)
Mar. 31, 2018
USD ($)
$ / shares
Feb. 28, 2014
USD ($)
$ / shares
Mar. 31, 2014
USD ($)
Dec. 31, 2018
USD ($)
Day
$ / shares
Dec. 31, 2017
USD ($)
Dec. 31, 2016
USD ($)
Sep. 30, 2018
USD ($)
Mar. 09, 2011
USD ($)
Debt Instrument [Line Items]                              
Outstanding principal amount                     $ 2,622,900,000        
Credit facility, amount repaid                     1,231,900,000 $ 483,100,000      
Loss on extinguishment of debt                     48,500,000        
Interest expense                     181,000,000 160,800,000 $ 99,300,000    
Amortization of deferred financing costs                     7,300,000 8,400,000 7,900,000    
Stock split conversion ratio     2                        
Paid-in-capital in excess of par value                     341,500,000 407,300,000      
Long-term debt                     2,453,800,000 2,268,100,000      
Convertible notes paid                     582,500,000        
Letters of credit issued but undrawn                     38,200,000        
Capped call transactions [Member]                              
Debt Instrument [Line Items]                              
Capped call transactions with financial institutions                 $ 123,800,000            
Prepaid forward share repurchase transactions [Member]                              
Debt Instrument [Line Items]                              
Forward share repurchase transactions amount                 685,800,000 $ 685,800,000          
Convertible Senior Notes Due 2019 [Member]                              
Debt Instrument [Line Items]                              
Outstanding principal amount                 1,150,000,000   675,000,000 1,150,000,000      
Deferred financing costs                   26,600,000          
Aggregate principal amount of convertible senior notes issued                 1,000,000,000            
Interest expense                     48,500,000 68,200,000 65,300,000    
Non-cash interest expense                     29,800,000 41,200,000 38,600,000    
Amortization of deferred financing costs                     $ 2,900,000 4,000,000 3,800,000    
Additional principal amount of convertible notes                 $ 150,000,000            
Convertible notes, interest rate                 2.00%   2.00%        
Convertible notes maturity                 Aug. 15, 2019   Aug. 15, 2019        
Convertible notes, conversion feature                     Holders of the 2019 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 2019 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 2019 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 2019 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 2019 Convertible Notes at any time, regardless of the foregoing circumstances.        
Convertible notes, number of trading days of threshold limit (whether or not consecutive) | Day                     20        
Convertible notes, number of trading days of threshold limit in consecutive days | Day                     30        
Minimum percentage of common share price over conversion price for conversion                 130.00%            
Principal amount of convertible notes                 $ 1,000   $ 1,000        
Minimum percentage of the product of common share price and conversion rate for convertible notes                 98.00%            
Convertible notes conversion rate                 23.1816   23.2245        
Convertible notes conversion price | $ / shares                 $ 43.14   $ 43.06        
Stock split conversion ratio                 2            
Closing price of common shares | $ / shares                     $ 58.95        
Paid-in-capital in excess of par value                 $ 219,100,000 5,100,000          
Long-term debt                 $ 930,900,000            
Effective interest rate on convertible notes                 6.20%            
Convertible notes paid               $ 583,500,000              
Accrued interest               1,000,000              
Fair value of liability to convertible notes                     $ 662,100,000 1,066,000,000      
Unamortized debt discount and debt issuance costs                     18,600,000 80,000,000      
Convertible senior notes, carrying value of liability component                     656,400,000 1,070,000,000      
Convertible Senior Notes Due 2019 [Member] | Repurchase of 2019 Convertible Notes [Member]                              
Debt Instrument [Line Items]                              
Loss on extinguishment of debt               13,100,000              
Repurchase of convertible notes               475,000,000              
Fair value of liability to convertible notes               459,400,000              
Fair value of equity component to convertible notes               123,000,000              
Reduction to long-term debt representing liability component of convertible notes               446,400,000              
Reduction to additional paid-in capital representing equity component               123,000,000              
Convertible Senior Notes Due 2019 [Member] | Debt Issuance Costs [Member]                              
Debt Instrument [Line Items]                              
Deferred financing costs                   $ 21,500,000          
Convertible Senior Notes Due 2019 [Member] | Subsequent Event [Member]                              
Debt Instrument [Line Items]                              
Reclassification of difference between aggregate principal amount and carrying value from additional paid in capital to temporary equity $ 18,600,000                            
Convertible Senior Notes Due 2024 [Member]                              
Debt Instrument [Line Items]                              
Outstanding principal amount                     550,000,000        
Deferred financing costs               12,900,000              
Aggregate principal amount of convertible senior notes issued               $ 550,000,000              
Interest expense                     26,600,000        
Non-cash interest expense                     14,500,000        
Amortization of deferred financing costs                     $ 1,000,000        
Convertible notes, interest rate               2.625%     2.625%        
Convertible notes maturity               Mar. 15, 2024     Mar. 15, 2024        
Convertible notes, conversion feature                     Holders of the 2024 Convertible Notes may convert their notes at their option under the following circumstances: (i) during any calendar quarter commencing after the calendar quarter ending June 30, 2018, 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 2024 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 2024 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 2024 Convertible Notes for each such day; (iii) if the Company calls the 2024 Convertible Notes for redemption; or (iv) upon the occurrence of specified corporate events. On and after December 15, 2023, holders may convert their 2024 Convertible Notes at any time, regardless of the foregoing circumstances.        
Convertible notes, number of trading days of threshold limit (whether or not consecutive) | Day                     20        
Convertible notes, number of trading days of threshold limit in consecutive days | Day                     30        
Minimum percentage of common share price over conversion price for conversion               130.00%              
Principal amount of convertible notes               $ 1,000     $ 1,000        
Minimum percentage of the product of common share price and conversion rate for convertible notes               98.00%              
Convertible notes conversion rate               16.0056     16.0352        
Convertible notes conversion price | $ / shares               $ 62.48     $ 62.36        
Stock split conversion ratio     2                        
Paid-in-capital in excess of par value               $ 139,900,000              
Long-term debt               $ 410,100,000              
Effective interest rate on convertible notes               8.40%              
Fair value of liability to convertible notes                     $ 448,100,000        
Unamortized debt discount and debt issuance costs                     134,000,000        
Convertible senior notes, carrying value of liability component                     416,000,000        
Deferred financing costs recorded as additional paid-in-capital in excess of par value               $ 3,300,000              
Convertible Senior Notes Due 2024 [Member] | Debt Issuance Costs [Member]                              
Debt Instrument [Line Items]                              
Deferred financing costs               $ 9,600,000              
Senior Notes Due 2026 [Member]                              
Debt Instrument [Line Items]                              
Outstanding principal amount                     400,000,000        
Deferred financing costs                     5,200,000     $ 5,400,000  
Aggregate principal amount of convertible senior notes issued             $ 400,000,000                
Interest expense                     11,100,000        
Amortization of deferred financing costs                     $ 200,000        
Convertible notes, interest rate             7.25%       7.25%        
Convertible notes maturity             Aug. 15, 2026       Aug. 15, 2026        
Senior notes, redemption price, percentage             100.00%                
Senior notes, redemption price percentage with equity offerings             107.25%                
Carrying amount                     $ 394,800,000        
Fair value of notes                     394,600,000        
Senior Notes Due 2026 [Member] | Debt Issuance Costs [Member]                              
Debt Instrument [Line Items]                              
Deferred financing costs                           $ 5,400,000  
Minimum [Member] | Convertible Senior Notes Due 2019 [Member]                              
Debt Instrument [Line Items]                              
Outstanding principal amount                     $ 249,100,000        
Maximum [Member] | Senior Notes Due 2026 [Member]                              
Debt Instrument [Line Items]                              
Percentage of aggregate pricipal amount of senior notes being redeemed             40.00%                
2011 Credit Facility [Member]                              
Debt Instrument [Line Items]                              
Credit facility, amount repaid                       410,000,000 429,700,000    
Credit facility, amount borrowed                         200,000,000    
Interest expense                         24,100,000    
Amortization of deferred financing costs                         $ 4,100,000    
2011 Credit Facility [Member] | 2011 Revolving Credit Facility [Member]                              
Debt Instrument [Line Items]                              
Credit facility, maximum amount                             $ 700,000,000
Credit facility amendment date                     May 04, 2015        
Line of credit facility extended maturity period                     1 year        
Amended maturity date of credit facility                     Mar. 09, 2017        
Repayment of prior senior secured credit facility       $ 410,000,000                      
Revolving credit facility termination date                     Feb. 15, 2017        
2011 Credit Facility [Member] | 2011 Revolving Credit Facility [Member] | LIBOR [Member] | Minimum [Member]                              
Debt Instrument [Line Items]                              
Interest rate spread on variable rate           4.00%                  
2011 Credit Facility [Member] | 2011 Revolving Credit Facility [Member] | LIBOR [Member] | Maximum [Member]                              
Debt Instrument [Line Items]                              
Interest rate spread on variable rate           5.00%                  
2011 Credit Facility [Member] | 2011 Revolving Credit Facility [Member] | Base Rate [Member] | Minimum [Member]                              
Debt Instrument [Line Items]                              
Interest rate spread on variable rate           3.00%                  
2011 Credit Facility [Member] | 2011 Revolving Credit Facility [Member] | Base Rate [Member] | Maximum [Member]                              
Debt Instrument [Line Items]                              
Interest rate spread on variable rate           4.00%                  
2011 Credit Facility [Member] | 2011 Term Loan [Member]                              
Debt Instrument [Line Items]                              
Credit facility, maximum amount                             $ 500,000,000
Credit facility amendment date                     Jul. 26, 2012        
Credit facility, maturity date                     Mar. 09, 2016        
Repayment of prior senior secured credit facility         $ 229,700,000                    
2011 Credit Facility [Member] | 2011 Term Loan [Member] | LIBOR [Member] | Minimum [Member]                              
Debt Instrument [Line Items]                              
Interest rate spread on variable rate           2.00%                  
2011 Credit Facility [Member] | 2011 Term Loan [Member] | LIBOR [Member] | Maximum [Member]                              
Debt Instrument [Line Items]                              
Interest rate spread on variable rate           3.00%                  
2011 Credit Facility [Member] | 2011 Term Loan [Member] | Base Rate [Member] | Minimum [Member]                              
Debt Instrument [Line Items]                              
Interest rate spread on variable rate           1.00%                  
2011 Credit Facility [Member] | 2011 Term Loan [Member] | Base Rate [Member] | Maximum [Member]                              
Debt Instrument [Line Items]                              
Interest rate spread on variable rate           2.00%                  
2017 Credit Facility [Member]                              
Debt Instrument [Line Items]                              
Credit facility, maximum amount       1,450,000,000                      
Credit Facility amended, effective date                     Mar. 16, 2018        
Deferred financing costs       $ 22,600,000                      
Credit facility, amount repaid   $ 1,178,100,000                 $ 1,226,900,000 $ 73,100,000      
Long-term debt, weighted average interest rate                       6.79%      
Credit facility, amount borrowed                       $ 1,300,000,000      
Borrowings under the senior secured credit facility                       1,226,900,000      
Foreign currency borrowings, outstanding                       0      
2017 Credit Facility [Member] | Other Expense (Income), Net [Member]                              
Debt Instrument [Line Items]                              
Loss on extinguishment of debt                     $ 35,400,000        
2017 Credit Facility [Member] | LIBOR [Member]                              
Debt Instrument [Line Items]                              
Interest rate spread on variable rate       1.00%                      
2017 Credit Facility [Member] | Base Rate [Member]                              
Debt Instrument [Line Items]                              
Base rate interest rate floor       1.75%                      
2017 Credit Facility [Member] | Federal Funds Rate [Member]                              
Debt Instrument [Line Items]                              
Interest rate spread on variable rate       0.50%                      
2017 Credit Facility [Member] | 2017 Revolving Credit Facility [Member]                              
Debt Instrument [Line Items]                              
Credit facility, maximum amount       $ 150,000,000                      
Credit facility, maturity date                     Feb. 15, 2022        
Repayment of prior senior secured credit facility   1,178,100,000                          
Credit facility LIBOR minimum floor rate interest       0.75%                      
Borrowings under the senior secured credit facility                       0      
2017 Credit Facility [Member] | 2017 Revolving Credit Facility [Member] | Base Rate [Member] | Scenario Leverage Ratio One [Member]                              
Debt Instrument [Line Items]                              
Interest rate spread on variable rate       3.50%                      
2017 Credit Facility [Member] | 2017 Revolving Credit Facility [Member] | Base Rate [Member] | Scenario Leverage Ratio Two [Member]                              
Debt Instrument [Line Items]                              
Interest rate spread on variable rate       3.75%                      
2017 Credit Facility [Member] | 2017 Revolving Credit Facility [Member] | Eurodollar [Member] | Scenario Leverage Ratio One [Member]                              
Debt Instrument [Line Items]                              
Interest rate spread on variable rate       4.50%                      
2017 Credit Facility [Member] | 2017 Revolving Credit Facility [Member] | Eurodollar [Member] | Scenario Leverage Ratio Two [Member]                              
Debt Instrument [Line Items]                              
Interest rate spread on variable rate       4.75%                      
2017 Credit Facility [Member] | 2017 Term Loan B [Member]                              
Debt Instrument [Line Items]                              
Credit facility, maturity date                     Feb. 15, 2023        
Outstanding principal amount       $ 1,300,000,000                      
Senior secured credit facility, discount percentage       2.00%                      
Senior secured credit facility, discount amount       $ 26,000,000                      
Borrowings under the senior secured credit facility                       1,226,900,000      
2017 Credit Facility [Member] | 2017 Term Loan B [Member] | Level 2 [Member]                              
Debt Instrument [Line Items]                              
Outstanding principal amount                       1,190,200,000      
Debt instrument, fair value                       1,226,100,000      
2017 Credit Facility [Member] | 2017 Term Loan B [Member] | Base Rate [Member]                              
Debt Instrument [Line Items]                              
Interest rate spread on variable rate       4.50%                      
2017 Credit Facility [Member] | 2017 Term Loan B [Member] | Eurodollar [Member]                              
Debt Instrument [Line Items]                              
Interest rate spread on variable rate       5.50%                      
2017 Credit Facility [Member] | 2017 Term Loan B [Member] | 2017 Revolving Credit Facility [Member]                              
Debt Instrument [Line Items]                              
Revolving credit facility termination date                     Aug. 16, 2018        
2018 Credit Facility [Member]                              
Debt Instrument [Line Items]                              
Credit facility, maximum amount   1,250,000,000                          
Deferred financing costs   11,700,000                          
Credit facility, amount repaid                     $ 5,000,000        
Line of credit facility, frequency of interest payments                     quarterly        
Long-term debt, weighted average interest rate                     6.80%        
Credit facility, amount borrowed                     $ 1,000,000,000        
Borrowings under the senior secured credit facility                     995,000,000        
Foreign currency borrowings, outstanding                     0        
2018 Credit Facility [Member] | Minimum [Member] | 2019 Convertible Notes Exceeds 350 Million [Member]                              
Debt Instrument [Line Items]                              
Outstanding principal amount   350,000,000                          
2018 Credit Facility [Member] | Minimum [Member] | 2024 Convertible Notes Exceeds 350 Million [Member]                              
Debt Instrument [Line Items]                              
Outstanding principal amount   $ 350,000,000                          
2018 Credit Facility [Member] | LIBOR [Member]                              
Debt Instrument [Line Items]                              
Interest rate spread on variable rate   1.00%                          
2018 Credit Facility [Member] | Base Rate [Member]                              
Debt Instrument [Line Items]                              
Base rate interest rate floor   1.00%                          
2018 Credit Facility [Member] | Federal Funds Rate [Member]                              
Debt Instrument [Line Items]                              
Interest rate spread on variable rate   0.50%                          
2018 Credit Facility [Member] | 2018 Revolving Credit Facility [Member]                              
Debt Instrument [Line Items]                              
Credit facility, maximum amount   $ 250,000,000                          
Credit facility, maturity date   Aug. 16, 2023                          
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage   0.50%                          
Borrowings under the senior secured credit facility                     $ 0        
2018 Credit Facility [Member] | 2018 Revolving Credit Facility [Member] | 2019 Convertible Notes Exceeds 350 Million [Member]                              
Debt Instrument [Line Items]                              
Credit facility, maturity date   Feb. 14, 2019                          
2018 Credit Facility [Member] | 2018 Revolving Credit Facility [Member] | Base Rate [Member]                              
Debt Instrument [Line Items]                              
Interest rate spread on variable rate   2.00%                          
2018 Credit Facility [Member] | 2018 Revolving Credit Facility [Member] | Eurodollar [Member]                              
Debt Instrument [Line Items]                              
Interest rate spread on variable rate   2.00%                          
2018 Credit Facility [Member] | 2018 Term Loan A [Member]                              
Debt Instrument [Line Items]                              
Credit facility, maturity date   Aug. 16, 2023                          
Outstanding principal amount   $ 250,000,000                          
Voluntary prepayment premium percentage                     1.00%        
Borrowings under the senior secured credit facility                     $ 246,900,000        
2018 Credit Facility [Member] | 2018 Term Loan A [Member] | Level 2 [Member]                              
Debt Instrument [Line Items]                              
Outstanding principal amount                     245,400,000        
Debt instrument, fair value                     $ 240,700,000        
2018 Credit Facility [Member] | 2018 Term Loan A [Member] | 2019 Convertible Notes Exceeds 350 Million [Member]                              
Debt Instrument [Line Items]                              
Credit facility, maturity date   Feb. 14, 2019                          
2018 Credit Facility [Member] | 2018 Term Loan A [Member] | Base Rate [Member]                              
Debt Instrument [Line Items]                              
Interest rate spread on variable rate   3.00%                          
2018 Credit Facility [Member] | 2018 Term Loan A [Member] | Eurodollar [Member]                              
Debt Instrument [Line Items]                              
Interest rate spread on variable rate   3.00%                          
2018 Credit Facility [Member] | 2018 Term Loan B [Member]                              
Debt Instrument [Line Items]                              
Credit facility, maturity date   Aug. 18, 2025                          
Outstanding principal amount   $ 750,000,000                          
Senior secured credit facility, discount percentage   0.25%                          
Senior secured credit facility, discount amount   $ 1,900,000                          
Voluntary prepayment premium percentage                     1.00%        
Borrowings under the senior secured credit facility                     $ 748,100,000        
2018 Credit Facility [Member] | 2018 Term Loan B [Member] | Level 2 [Member]                              
Debt Instrument [Line Items]                              
Outstanding principal amount                     738,200,000        
Debt instrument, fair value                     729,300,000        
2018 Credit Facility [Member] | 2018 Term Loan B [Member] | 2019 Convertible Notes Exceeds 350 Million [Member]                              
Debt Instrument [Line Items]                              
Credit facility, maturity date   May 16, 2019                          
2018 Credit Facility [Member] | 2018 Term Loan B [Member] | 2024 Convertible Notes Exceeds 350 Million [Member]                              
Debt Instrument [Line Items]                              
Credit facility, maturity date   Dec. 15, 2023                          
2018 Credit Facility [Member] | 2018 Term Loan B [Member] | Base Rate [Member]                              
Debt Instrument [Line Items]                              
Interest rate spread on variable rate   2.25%                          
2018 Credit Facility [Member] | 2018 Term Loan B [Member] | Eurodollar [Member]                              
Debt Instrument [Line Items]                              
Interest rate spread on variable rate   3.25%                          
Senior Unsecured Notes [Member]                              
Debt Instrument [Line Items]                              
Aggregate principal amount of convertible senior notes issued   $ 400,000,000                          
2018 and 2017 Credit Facility [Member]                              
Debt Instrument [Line Items]                              
Interest expense                     83,600,000        
Non-cash interest expense                     2,900,000        
Amortization of deferred financing costs                     $ 3,200,000        
2017 and 2011 Credit Facility [Member]                              
Debt Instrument [Line Items]                              
Interest expense                       87,000,000      
Non-cash interest expense                       4,200,000      
Amortization of deferred financing costs                       $ 4,400,000