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Earnings Per Share and Equity - Narrative (Details) - USD ($)
 12 Months Ended
Dec. 01, 2014
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Nov. 30, 2018
Mar. 31, 2017
Jun. 08, 2015
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]              
Anti-dilutive shares (in shares)   800,000 600,000 200,000      
Amount remaining to be repurchased under the stock repurchase program   $ 1,361,100,000 $ 1,500,000,000.0 $ 603,200,000      
Common stock repurchased   138,900,000 315,000,000.0 25,000,000.0      
Payments of tax withholding for restricted shares   $ 33,500,000 31,600,000 28,100,000      
Shares reissued or retired (in shares)   0          
Noncontrolling interest balance   $ 22,400,000 22,500,000        
Income attributable to non-controlling interests   2,200,000 2,500,000 2,300,000      
Dividend to non-controlling shareholder   $ 2,300,000 $ 2,200,000 $ 1,900,000      
Leshan              
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]              
Ownership percentage   80.00%          
Noncontrolling interest balance   $ 22,400,000          
OSA              
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]              
Ownership percentage   60.00% 50.00%        
Equity interest value     $ 24,600,000        
Required increase in ownership percentage   100.00%          
OSA | FSL              
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]              
Interest held by FSL   40.00%          
Treasury Stock              
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]              
Shares withheld for payment of taxes (in shares)   1,620,543 1,343,961 1,750,182      
Noncontrolling Interest              
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]              
Dividend to non-controlling shareholder   $ 2,300,000 $ 2,200,000 $ 1,900,000      
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 $ 25,000,000.0      
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   1,361,100,000          
Common stock repurchased   $ 138,900,000          
1.00% Notes              
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]              
Debt instrument, interest rate   1.00%          
1.00% Notes | Convertible Debt              
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]              
Debt instrument, interest rate   1.00% 1.00%       1.00%
Average price of common stock to exceed to include effect of additional potential shares (in dollars per share)   $ 25.96          
Conversion price per share (in dollars per share)   $ 18.50         $ 18.50
1.625% Notes              
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]              
Debt instrument, interest rate   1.625%          
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%  
Average price of common stock to exceed to include effect of additional potential shares (in dollars per share)   $ 30.70          
Conversion price per share (in dollars per share)   $ 20.72       $ 20.72