Quarterly report pursuant to Section 13 or 15(d)

Subsequent Events - Additional Information (Detail)

v2.4.0.8
Subsequent Events - Additional Information (Detail) (Subsequent Event [Member], USD $)
In Millions, unless otherwise specified
0 Months Ended
Apr. 25, 2014
Subsequent Event [Member]
 
Subsequent Event [Line Items]  
Shares repurchased through open market purchases, aggregate cost $ 255
Repurchase of common shares 4.5