XML 72 R64.htm IDEA: XBRL DOCUMENT v3.2.0.727
Weighted Average Common Shares - Additional Information (Detail) - shares
shares in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Earnings Per Share [Abstract]        
Anti-dilutive awards excluded from computations of diluted earnings per share 0 0 0 0