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Earnings Per Share (Details) - shares
3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Earnings Per Share [Abstract]        
Weighted Average Number of Shares Outstanding, Basic 296,136,564 302,225,923 300,173,831 302,225,923
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements 8,889 0 4,873 0
Weighted Average Number of Shares Outstanding, Diluted 296,145,453 302,225,923 300,178,704 302,225,923
Anti-dilutive shares (shares) 946,610   544,292