Quarterly report pursuant to Section 13 or 15(d)

Shareholders' Deficit - Additional Information (Detail)

v3.20.2
Shareholders' Deficit - Additional Information (Detail) - USD ($)
 1 Months Ended 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2020
Oct. 30, 2018
Feb. 28, 2014
Jun. 30, 2020
Jun. 30, 2019
Mar. 31, 2014
Jun. 30, 2020
Jun. 30, 2019
Dec. 31, 2018
Dec. 31, 2019
Stockholders Equity [Line Items]                    
Share repurchase program authorized amount $ 1,500,000,000 $ 1,500,000,000   $ 1,500,000,000     $ 1,500,000,000      
Share repurchase program, remaining authorized capacity 1,482,900,000 $ 113,300,000   1,482,900,000     $ 1,482,900,000      
Share repurchase program expiration date   Feb. 21, 2020         Oct. 30, 2023      
Forward counterparties shares purchased and subsequently retired               2,000,000.0    
Accumulated deficit $ (70,600,000)     (70,600,000)     $ (70,600,000)     $ (215,300,000)
Shares repurchases, value       $ 21,300,000 $ 1,400,000   $ 26,000,000.0 $ 9,000,000.0    
Treasury stock shares, at cost 10,000,000.0     10,000,000.0     10,000,000.0     10,000,000.0
Shares repurchases, inclusive of transaction costs and issuance of CVR value             $ 17,100,000 0    
Withheld for tax purpose for share-based compensation plans             8,900,000 9,000,000.0    
Other comprehensive income (loss) before foreign currency translation adjustments reclassifications, tax expense (benefit)       $ (2,300,000) (1,500,000)   (4,800,000) (1,000,000.0)    
Other comprehensive loss before unrealized gain (loss) on derivatives adjustments reclassifications, tax expense (benefit)             $ (300,000)      
Capped call transactions [Member]                    
Stockholders Equity [Line Items]                    
Capped call transactions with financial institutions     $ 123,800,000              
Capped call transactions price per common share     $ 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     $ 43.14              
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     19,900,000              
Average cost per share of shares repurchased     $ 34.51              
Settlement date of forward transactions             Aug. 15, 2019      
Forward counterparties shares purchased and subsequently retired 19,900,000                  
Shares outstanding under forward purchasing transactions 0     0     0      
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         $ 300,000     $ 1,000,000.0    
Open Market Repurchase Plan                    
Stockholders Equity [Line Items]                    
Average cost per share of shares repurchased             $ 39.27      
Shares repurchases, value             $ 17,100,000      
Repurchase of common stock, shares             400,000 0