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Earnings Per Share (Reconciliation Of Weighted-Average Shares Used In Earnings Per Share Computations) (Details) - shares
3 Months Ended 6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Earnings Per Share [Abstract]        
Weighted-average shares - basic (in shares) 284,600,000 232,100,000 258,500,000 232,000,000
Potentially dilutive share options (in shares) 0 100,000 0 100,000
Weighted-average shares - diluted (in shares) 284,600,000 232,200,000 258,500,000 232,100,000
Antidilutive share options excluded from computation of diluted earnings per share (in shares) 500,000 500,000 600,000 500,000