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Share Capital - Narrative (Details) - USD ($)
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Dec. 07, 2021
Mar. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Common stock authorized (shares) 190,000,000        
Common stock, par value (USD per share) $ 0.001 $ 0.001      
Share repurchase program, stock repurchased (shares)     4,800,000    
Share repurchase program, aggregate purchase price $ (48,000,000) $ (30,000,000) $ (24,000,000)    
Common stock, dividends declared (USD per share) $ 1.00        
Common stock, dividends paid $ 79,000,000 $ 0 0    
Preferred stock authorized (shares) 10,000,000,000,000        
Preferred stock, par value (USD per share) $ 0.001        
Preferred stock issued (shares) 0 0      
Preferred stock outstanding (shares) 0 0      
December 2021 Share Repurchase Program          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Share repurchase program, authorized amount (in shares)       10,000,000  
Share repurchase program, authorized amount       $ 100,000,000  
Share repurchase program, stock repurchased (shares) 0        
March 2020 Share Repurchase Program          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Share repurchase program, authorized amount $ 100,000,000       $ 100,000,000
Share repurchase program, stock repurchased (shares) 4,600,000 6,900,000      
Average price of treasury stock acquired (USD per share) $ 10.64 $ 4.28      
Share repurchase program, authorized maximum percentage of common stock to be repurchased (as a percent)         15.00%
May 2012 Share Repurchase Program          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Share repurchase program, authorized amount     $ 150,000,000    
Share repurchase program, stock repurchased (shares)     4,800,000    
Average price of treasury stock acquired (USD per share)     $ 4.98    
Share repurchase program, aggregate purchase price     $ (24,000,000)    
Dividend Declared          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Share-based compensation expense $ 3,000,000        
Increase in deficit 2,000,000        
Increase in additional paid-in capital 2,000,000        
Increase in liabilities 3,000,000        
Treasury Stock          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Share repurchase program, aggregate purchase price     (24,000,000)    
Treasury Stock | March 2020 Share Repurchase Program          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Share repurchase program, aggregate purchase price $ (48,000,000)        
Incentive Plans          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Stock authorized for issuance as stock incentive awards (shares) 14,320,960        
Share-based compensation expense $ 38,000,000 $ 14,000,000 $ 2,000,000    
Incentive Plans | March 2020 Share Repurchase Program          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Share repurchase program, aggregate purchase price   $ (30,000,000)