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Earnings Per Share and Equity - Narrative (Details) - USD ($)
 12 Months Ended
Dec. 01, 2014
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Jun. 07, 2020
Nov. 30, 2018
Nov. 15, 2018
Mar. 31, 2017
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]                
Anti-dilutive shares (in shares)   800,000 800,000 600,000        
Amount remaining to be repurchased under the stock repurchase program   $ 1,295,800,000 $ 1,361,100,000 $ 1,500,000,000.0        
Common stock repurchased   65,300,000 138,900,000 315,000,000.0        
Payments of tax withholding for restricted shares   $ 20,000,000.0 33,500,000 31,600,000        
Shares reissued or retired (in shares)   0            
Noncontrolling interest balance   $ 19,600,000 22,400,000          
Income attributable to non-controlling interests   2,200,000 2,200,000 2,500,000        
Dividend to non-controlling shareholder   $ 5,000,000.0 $ 2,300,000 $ 2,200,000        
Rights Agreement | Series B Preferred Stock                
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]                
Exercise price, warrants (in dollars per share)         $ 100.80      
Dividend declared (in shares)         1      
Preferred stock par value (in dollars per share)         $ 0.01      
Minimum beneficial ownership to trigger exercise option         15.00%      
Leshan                
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]                
Ownership percentage   80.00%            
Noncontrolling interest balance   $ 19,600,000            
OSA                
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]                
Ownership percentage   100.00%   60.00%        
Additional ownership percentage acquired   40.00%   50.00%        
Equity interest value       $ 24,600,000        
Settlement of purchase price   $ 26,000,000.0            
Treasury Stock                
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]                
Shares withheld for payment of taxes (in shares)   1,062,377 1,620,543 1,343,961        
Noncontrolling Interest                
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]                
Dividend to non-controlling shareholder   $ 5,000,000.0 $ 2,300,000 $ 2,200,000        
2014 Program                
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]                
Cash allocation policy, target percentage to return to shareholders 80.00%              
Authorized repurchases $ 1,000,000,000.0              
Period in which the company intends to repurchase the shares 4 years              
Amount remaining to be repurchased under the stock repurchase program           $ 288,200,000    
Common stock repurchased       $ 315,000,000.0        
2018 Program                
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]                
Authorized repurchases             $ 1,500,000,000  
Amount remaining to be repurchased under the stock repurchase program   1,295,800,000            
Common stock repurchased   $ 65,300,000 $ 138,900,000          
1.00% Notes | Convertible Debt                
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]                
Debt instrument, interest rate   1.00%            
Exercise price, warrants (in dollars per share)   $ 25.96            
1.625% Notes | Convertible Debt                
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]                
Debt instrument, interest rate   1.625% 1.625%         1.625%
Exercise price, warrants (in dollars per share)   $ 30.70            
Conversion price per share (in dollars per share)   $ 20.72           $ 20.72