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Condensed Consolidating Financial Information - Schedule of Condensed Consolidating Balance Sheet - Additional Information (Details) - $ / shares
Mar. 31, 2019
Dec. 31, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]    
Common stock, par value (in usd per share) $ 0.01 $ 0.01
Common stock, shares authorized (in shares) 900,000,000 900,000,000
Common stock, shares issued (in shares) 324,829,258 320,469,049
Common stock, shares outstanding (in shares) 322,051,268 318,377,161
Treasury stock, shares (in shares) 2,777,990 2,091,888