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CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Unaudited) - USD ($)
$ in Millions
Total
Common Stock and Additional Paid-In Capital ( in shares )
Common Stock and Additional Paid-In Capital
Accumulated Deficit
AOCI Attributable to Parent [Member]
Balance (in shares) at Dec. 31, 2017   69,818,392      
Balance at Dec. 31, 2017 $ 206   $ 583 $ (377) $ 0
Net income 54     54  
Other comprehensive income (1)       (1)
Issuance of common stock from vested restricted stock units (in shares)   610,266      
Issuance of common stock from exercise of stock options (in shares)   206,430      
Issuance of common stock from exercise of stock options 3   3    
Stock-based compensation expense 9   9    
Repurchase of common stock (in shares)   (160,033)      
Repurchase of common stock (8)     (8)  
Awards effectively repurchased for required employee withholding taxes (in shares)   (111,804)      
Awards effectively repurchased for required employee withholding taxes (4)     (4)  
Balance (in shares) at Mar. 31, 2018   70,363,251      
Balance at Mar. 31, 2018 262   595 (332) (1)
Cumulative effect of accounting change 3     3  
Balance (in shares) at Dec. 31, 2018   70,596,559      
Balance at Dec. 31, 2018 375   $ 641 (266) 0
Net income 63     63  
Issuance of common stock from vested restricted stock units (in shares)     286,719    
Issuance of common stock from exercise of stock options (in shares)   81,282      
Issuance of common stock from exercise of stock options 1   $ 1    
Stock-based compensation expense $ 9   9    
Repurchase of common stock (in shares) (782,909) (782,909)      
Repurchase of common stock $ (38)     (38)  
Awards effectively repurchased for required employee withholding taxes (in shares)   (101,904)      
Awards effectively repurchased for required employee withholding taxes (4)     (4)  
Balance (in shares) at Mar. 31, 2019   70,079,747      
Balance at Mar. 31, 2019 $ 406   $ 651 $ (245) $ 0