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Earnings Per Share - Additional Information (Detail) - shares
3 Months Ended 6 Months Ended
Jun. 27, 2015
Jun. 28, 2014
Jun. 27, 2015
Jun. 28, 2014
Stock options and restricted stock        
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]        
Shares excluded from computation of diluted earnings per share 9,000,000 7,000,000 9,000,000 8,000,000
Nonvested Options and Shares        
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]        
Shares excluded from computation of diluted earnings per share   10,000,000   11,000,000
Nonvested Options and Shares | Maximum        
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]        
Shares excluded from computation of diluted earnings per share 1,000,000   1,000,000