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Earnings Per Share (Reconciliation Of Weighted-Average Shares Used In Earnings Per Share Computations) (Details) - shares
3 Months Ended 9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Earnings Per Share [Abstract]        
Weighted-average shares - basic (in shares) 298,600,000 232,400,000 272,000,000 232,200,000
Potentially dilutive share options (in shares) 0 (100,000) 0 0
Weighted-average shares - diluted (in shares) 298,600,000 232,500,000 272,000,000 232,200,000
Antidilutive share options excluded from computation of diluted earnings per share (in shares) 1,200,000 900,000 1,200,000 900,000