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Share-Based Compensation - Additional Information (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based awards exercisable 2,110,000    
Unrecognized compensation cost $ 1.8    
Cash received from option exercises 21.1 $ 11.3 $ 35.7
Tax benefit realized from stock options exercised 5.5 1.9 5.5
Intrinsic value of options exercised 8.1 4.4 15.1
Released intrinsic value $ 3.1 1.7 4.7
2009 Omnibus Incentive Compensation Plan      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Authorized shares of common stock 7,450,000    
Common stock available for grant 1,760,495    
Restricted Or Unrestricted Shares Or Other Share-Based Awards | 2009 Omnibus Incentive Compensation Plan      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Authorized shares of common stock 5,400,000    
Restricted Stock      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based awards 307,965,000    
Share based awards forfeited 20,827    
Unrecognized compensation cost $ 17.6    
Expected to be recognized, weighted-average period (In years) 3 years 11 months 19 days    
Fair value, vested $ 14.6 20.5 17.9
Stock Options      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Unrecognized compensation cost $ 7.4    
Expected to be recognized, weighted-average period (In years) 2 years 2 months 12 days    
Stock Options | Maximum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based awards exercisable 185,421    
Share based awards forfeited 270,506    
Performance Units      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based awards 81,016    
Share based awards forfeited 113,141    
Restricted Stock Units (RSUs)      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based awards 109,665    
Employees awards, granted 193,000    
Unrecognized compensation cost $ 2.8    
Expected to be recognized, weighted-average period (In years) 1 year 6 months    
Fair value, vested $ 7.5 $ 2.7 $ 4.6
Cash-settled stock appreciation rights      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Employees awards, granted 93,559    
Cash-settled stock appreciation rights | Employees In Certain Foreign Countries      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Employees awards, granted 5,554    
Cash-settled units      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Employees awards, granted 17,896    
Cash-settled performance units      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Employees awards, granted 49,472