Quarterly report pursuant to Section 13 or 15(d)

Long-Term Debt - Additional Information (Detail)

v3.19.2
Long-Term Debt - Additional Information (Detail)
1 Months Ended 3 Months Ended 6 Months Ended 12 Months Ended
Aug. 16, 2018
USD ($)
Feb. 15, 2017
USD ($)
Mar. 09, 2016
USD ($)
May 04, 2015
Aug. 31, 2018
USD ($)
Mar. 31, 2018
USD ($)
$ / shares
Feb. 28, 2014
USD ($)
$ / shares
Jun. 30, 2019
USD ($)
$ / shares
Dec. 31, 2018
USD ($)
Day
Jun. 30, 2018
USD ($)
Mar. 31, 2014
USD ($)
Jun. 30, 2019
USD ($)
Day
d
$ / shares
Jun. 30, 2018
USD ($)
Dec. 31, 2018
USD ($)
Sep. 30, 2018
USD ($)
Mar. 09, 2011
USD ($)
Debt Instrument [Line Items]                                
Outstanding principal amount               $ 2,612,700,000       $ 2,612,700,000        
Loss on extinguishment of debt                         $ 13,100,000      
Borrowings under the senior secured credit facility               974,500,000 $ 983,600,000     974,500,000   $ 983,600,000    
Interest expense               42,400,000   $ 49,100,000   84,800,000 93,700,000      
Paid-in-capital in excess of par value               354,500,000 341,500,000     354,500,000   341,500,000    
Long-term debt               2,469,900,000 2,453,800,000     2,469,900,000   2,453,800,000    
Convertible notes paid                         582,500,000      
Letters of credit issued but undrawn               38,000,000.0       38,000,000.0        
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             1,150,000,000 675,000,000.0 $ 675,000,000.0     675,000,000.0   675,000,000.0    
Deferred financing costs                     26,600,000          
Aggregate principal amount of convertible senior notes issued             1,000,000,000                  
Interest expense               10,900,000   10,400,000   21,600,000 27,400,000      
Non-cash interest expense               6,800,000   6,400,000   13,500,000 16,800,000      
Amortization of deferred financing costs               $ 600,000   600,000   $ 1,300,000 1,600,000      
Additional principal amount of convertible notes             $ 150,000,000                  
Convertible notes, interest rate             2.00% 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     20        
Convertible notes, number of trading days of threshold limit in consecutive days | Day                 30     30        
Minimum percentage of common share price over conversion price for conversion             130.00%   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       $ 43.06        
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           1,000,000.0                    
Fair value of liability to convertible notes               $ 671,900,000 $ 662,100,000     $ 671,900,000   662,100,000    
Unamortized debt discount and debt issuance costs               3,800,000 18,600,000     3,800,000   18,600,000    
Convertible senior notes, carrying value of liability component               671,200,000 656,400,000     671,200,000   656,400,000    
Convertible Senior Notes Due 2019 [Member] | Repurchase of 2019 Convertible Notes [Member]                                
Debt Instrument [Line Items]                                
Loss on extinguishment of debt           13,100,000             13,100,000      
Repurchase of convertible notes           475,000,000.0             475,000,000.0      
Fair value of liability to convertible notes           459,400,000                    
Fair value of equity component to convertible notes           123,000,000.0                    
Reduction to long-term debt representing liability component of convertible notes           446,400,000                    
Reduction to additional paid-in capital representing equity component           123,000,000.0                    
Convertible Senior Notes Due 2019 [Member] | Debt Issuance Costs [Member]                                
Debt Instrument [Line Items]                                
Deferred financing costs                     $ 21,500,000          
Convertible Senior Notes Due 2024 [Member]                                
Debt Instrument [Line Items]                                
Outstanding principal amount               550,000,000.0 550,000,000.0     550,000,000.0   550,000,000.0    
Deferred financing costs           12,900,000                    
Aggregate principal amount of convertible senior notes issued           $ 550,000,000                    
Interest expense               8,900,000   8,500,000   17,700,000 9,300,000      
Non-cash interest expense               4,900,000   4,500,000   9,800,000 5,000,000.0      
Amortization of deferred financing costs               $ 400,000   300,000   $ 700,000 300,000      
Convertible notes, interest rate           2.625%   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) | d                       20        
Convertible notes, number of trading days of threshold limit in consecutive days | d                       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       $ 62.36        
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               $ 464,100,000 448,100,000     $ 464,100,000   448,100,000    
Unamortized debt discount and debt issuance costs               123,600,000 134,000,000.0     123,600,000   134,000,000.0    
Convertible senior notes, carrying value of liability component               426,400,000 416,000,000.0     426,400,000   416,000,000.0    
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               400,000,000.0 400,000,000.0     400,000,000.0   400,000,000.0    
Deferred financing costs               5,000,000.0 5,200,000     5,000,000.0   5,200,000 $ 5,400,000  
Aggregate principal amount of convertible senior notes issued         $ 400,000,000                      
Interest expense               7,400,000       14,800,000        
Amortization of deferred financing costs               $ 200,000       $ 300,000        
Convertible notes, interest rate         7.25%     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               $ 395,000,000.0 394,800,000     $ 395,000,000.0   394,800,000    
Fair value of notes               $ 402,100,000 $ 394,600,000     $ 402,100,000   394,600,000    
Senior Notes Due 2026 [Member] | Debt Issuance Costs [Member]                                
Debt Instrument [Line Items]                                
Deferred financing costs                             $ 5,400,000  
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] | 2011 Revolving Credit Facility [Member]                                
Debt Instrument [Line Items]                                
Credit facility, maximum amount                               $ 700,000,000.0
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   $ 410,000,000.0                            
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                               $ 500,000,000.0
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   1,450,000,000.0                            
Credit Facility amended, effective date                       Mar. 16, 2018        
Deferred financing costs   $ 22,600,000                            
Credit facility, amount repaid $ 1,178,100,000                     $ 48,800,000        
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   $ 150,000,000.0                            
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%                            
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   $ 1,300,000,000.0                            
Senior secured credit facility, discount percentage   2.00%                            
Senior secured credit facility, discount amount   $ 26,000,000.0                            
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                       $ 10,000,000.0        
Line of credit facility, frequency of interest payments                       quarterly        
Long-term debt, weighted average interest rate               5.72% 6.80%     5.72%   6.80%    
Borrowings under the senior secured credit facility               $ 985,000,000.0 $ 995,000,000.0     $ 985,000,000.0   $ 995,000,000.0    
Foreign currency borrowings, outstanding               0 0     0   0    
2018 Credit Facility [Member] | Minimum [Member] | 2024 Convertible Notes Exceeds 350 Million [Member]                                
Debt Instrument [Line Items]                                
Outstanding principal amount $ 350,000,000.0                              
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 $ 250,000,000.0                              
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 0     0   0    
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 $ 250,000,000.0                              
Borrowings under the senior secured credit facility               240,600,000 246,900,000     240,600,000   246,900,000    
2018 Credit Facility [Member] | 2018 Term Loan A [Member] | Level 2 [Member]                                
Debt Instrument [Line Items]                                
Outstanding principal amount               239,300,000 245,400,000     239,300,000   245,400,000    
Debt instrument, fair value               240,900,000 240,700,000     240,900,000   240,700,000    
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 $ 750,000,000.0                              
Senior secured credit facility, discount percentage 0.25%                              
Senior secured credit facility, discount amount $ 1,900,000                              
Borrowings under the senior secured credit facility               744,400,000 748,100,000     744,400,000   748,100,000    
2018 Credit Facility [Member] | 2018 Term Loan B [Member] | Level 2 [Member]                                
Debt Instrument [Line Items]                                
Outstanding principal amount               735,200,000 738,200,000     735,200,000   738,200,000    
Debt instrument, fair value               745,300,000 $ 729,300,000     745,300,000   $ 729,300,000    
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               14,900,000   24,900,000   29,900,000 49,100,000      
Non-cash interest expense               100,000   1,200,000   100,000 2,300,000      
Amortization of deferred financing costs               $ 400,000   $ 1,100,000   $ 800,000 $ 2,100,000