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Earnings Per Share - Additional Information (Detail) - shares
shares in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2018
Jul. 01, 2017
Jun. 30, 2018
Jul. 01, 2017
Earnings Per Share [Abstract]        
Antidilutive securities excluded from computation of earnings per share 0.1 0.4 0.1 0.5