Annual report pursuant to Section 13 and 15(d)

Shareholders' Deficit - Additional Information (Detail)

v3.10.0.1
Shareholders' Deficit - Additional Information (Detail)
 1 Months Ended 3 Months Ended 12 Months Ended
Apr. 24, 2018
Oct. 30, 2018
USD ($)
May 31, 2018
USD ($)
$ / shares
shares
Oct. 31, 2017
USD ($)
$ / shares
shares
Feb. 28, 2014
USD ($)
$ / shares
shares
Mar. 31, 2014
USD ($)
Dec. 31, 2018
USD ($)
$ / shares
shares
Dec. 31, 2017
USD ($)
$ / shares
shares
Dec. 31, 2016
USD ($)
shares
Stockholders Equity [Line Items]                  
Common shares, shares outstanding | shares             142,800,000 164,700,000 186,300,000
Preference shares authorized | shares             7,500,000    
Preference shares par value | $ / shares             $ 0.002    
Dividends paid             $ 0 $ 0 $ 0
Share repurchase program authorized amount   $ 1,500,000,000         1,500,000,000    
Share repurchase program, remaining authorized capacity   $ 113,300,000         $ 1,500,000,000    
Share repurchase program expiration date   Feb. 21, 2020         Oct. 30, 2023    
Forward counterparties shares purchased and subsequently retired | shares             13,900,000    
Accumulated deficit             $ (526,300,000) $ (248,100,000)  
Repurchase of common stock, shares | shares             14,300,000 25,400,000 400,000
Treasury stock shares, at cost | shares             10,000,000 10,000,000  
Shares repurchases, inclusive of transaction costs and issuance of CVR value             $ 600,700,000 $ 795,300,000 $ 0
Withheld for tax purpose for share-based compensation plans             145,400,000 60,400,000 13,200,000
Shares repurchases, value             746,100,000 855,700,000 13,200,000
Payments for share repurchases             750,300,000 844,200,000 13,200,000
Payments for share repurchases from prior period liability             4,200,000    
Share repurchases for which subsequent payment to be made               4,200,000  
Stock split conversion ratio 2                
Terminating result of portion of capped call transactions cash received             55,900,000    
Other comprehensive income (loss) before foreign currency translation adjustments reclassifications, Tax expense (benefit)             2,700,000 5,700,000 5,200,000
Other comprehensive Unrealized Gain (Loss) on Derivatives before reclassifications, Tax expense (benefit)                 (300,000)
Amounts reclassified from accumulated other comprehensive income (loss) to income, tax expense (benefit), other                 100,000
Convertible Senior Notes Due 2019 [Member]                  
Stockholders Equity [Line Items]                  
Stock split conversion ratio         2        
Capped call transactions [Member]                  
Stockholders Equity [Line Items]                  
Capped call transactions with financial institutions         $ 123,800,000        
Capped call transactions price per common share | $ / shares         $ 60.39        
Increase (decrease) in additional paid-in capital, other           $ (123,800,000)      
Terminating result of portion of capped call transactions cash received             $ 55,900,000    
Capped call transactions [Member] | Convertible Senior Notes Due 2019 [Member]                  
Stockholders Equity [Line Items]                  
Convertible notes conversion price | $ / shares         $ 43.14        
Capped call transactions [Member] | Common Shares [Member]                  
Stockholders Equity [Line Items]                  
Weighted-average adjusted cap price per common share | $ / shares             54.30    
Prepaid forward share repurchase transactions [Member]                  
Stockholders Equity [Line Items]                  
Forward share repurchase transactions amount         $ 685,800,000 685,800,000      
Forward transactions, shares to be purchased | shares         19,900,000        
Average cost per share of shares repurchased | $ / shares         $ 34.51        
Settlement date of forward transactions             Aug. 15, 2019    
Forward counterparties shares purchased and subsequently retired | shares             13,900,000    
Non-cash interest expense relating to unamortized non-cash issuance costs             $ 4,300,000    
Shares outstanding under forward purchasing transactions | shares             6,000,000    
Accumulated deficit           (653,900,000)      
Additional paid-in-capital           (31,900,000)      
Non-cash forward transaction issuance costs           $ 35,800,000      
Non-cash interest expense relating to amortization of non-cash issuance costs             $ 9,200,000 $ 6,500,000 $ 6,500,000
Open market purchases [Member]                  
Stockholders Equity [Line Items]                  
Repurchase of common stock, shares | shares                 0
Open market purchases [Member] | Indirect wholly owned subsidiary [Member]                  
Stockholders Equity [Line Items]                  
Average cost per share of shares repurchased | $ / shares             $ 33.90 $ 32.81  
Repurchase of common stock, shares | shares             8,400 10,000,000  
Repurchase of common stock, value             $ 300,000 $ 328,600,000  
May 2018 Dutch Auction Tender Offer [Member]                  
Stockholders Equity [Line Items]                  
Average cost per share of shares repurchased | $ / shares     $ 52.50            
Repurchase of common stock, shares | shares     11,400,000            
Repurchase of common stock, value     $ 600,000,000            
October 2017 Dutch Auction Tender Offer [Member]                  
Stockholders Equity [Line Items]                  
Forward share repurchase transactions amount             $ 1,600,000    
Average cost per share of shares repurchased | $ / shares       $ 34.00          
Repurchase of common stock, shares | shares       13,500,000          
Repurchase of common stock, value       $ 457,800,000          
Contingent value right agreement term             2 years    
Non-transferable contractual contingent value right agreement initial fair value       $ 7,300,000     $ 15,700,000 6,900,000  
CVR expiration period             2019-08    
Gain (loss) recognized in other expense             $ (8,800,000) $ 400,000  
Dutch Auction Tender Offer [Member]                  
Stockholders Equity [Line Items]                  
Average cost per share of shares repurchased | $ / shares             $ 52.49 $ 33.49  
Repurchase of common stock, shares | shares             11,400,000 23,500,000  
Repurchase of common stock, value             $ 600,300,000 $ 786,400,000