Quarterly report pursuant to Section 13 or 15(d)

Earnings Per Share - Additional Information (Detail)

v2.4.0.8
Earnings Per Share - Additional Information (Detail) (Restricted Stock Units (RSUs) [Member])
In Millions, unless otherwise specified
3 Months Ended
Mar. 31, 2014
Restricted Stock Units (RSUs) [Member]
 
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]  
Antidilutive securities excluded from computation of diluted earnings per common share 0.6