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Earnings Per Share (Narrative) (Detail)
In Millions, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Earnings Per Share [Abstract]        
Average options excluded from computation of diluted earnings per share 0.6 0 0.5 0.9