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Condensed Consolidated Balance Sheets (Parenthetical) - $ / shares
Jun. 30, 2019
Mar. 31, 2019
Statement of Financial Position [Abstract]    
Common stock, par value (in dollars per share) $ 0.01 $ 0.01
Common stock, authorized (in shares) 600,000,000 600,000,000
Common stock, issued (in shares) 160,244,219 159,924,825
Common stock, outstanding (in shares) 140,218,119 140,027,853
Treasury stock (in shares) 20,026,100 19,896,972