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Consolidated Balance Sheets (Parenthetical) - $ / shares
Dec. 31, 2019
Dec. 31, 2018
Statement Of Financial Position [Abstract]    
Common stock, shares authorized (in shares) 810,000,000 810,000,000
Common stock , par value (USD per share) $ 0.01 $ 0.01
Common stock, shares Issued (in shares) 188,893,478 187,204,567
Common stock, shares outstanding (in shares) 163,574,243 170,780,474
Treasury stock (in shares) 25,319,235 16,424,093