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) (USD $)
In Millions, except Per Share data, unless otherwise specified
3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Earnings Per Share [Abstract]    
Equity grants with anti-dilutive effect 2.0 4.2
Convertible notes initial conversion price $ 86.28