Stock Option Activity (Detail) shares in Thousands	9 Months Ended
	Oct. 02, 2018 $ / shares shares
Options Outstanding, Shares
Outstanding, Beginning Balance | shares	1,311
Granted | shares	177
Exercised | shares	(864)
Forfeited | shares	(23)
Outstanding, Ending Balance | shares	601
Options Outstanding, Weighted Average Exercise Price
Outstanding, Beginning Balance | $ / shares	$ 32.68
Granted | $ / shares	37.77
Exercised | $ / shares	29.74
Forfeited | $ / shares	39.71
Outstanding, Ending Balance | $ / shares	$ 38.12
Options Exercisable, Shares
Options Exercisable Outstanding, Beginning Balance | shares	926
Options Exercisable Outstanding, Ending Balance | shares	198
Options Exercisable, Weighted Average Exercise Price
Options Exercisable, Beginning Balance | $ / shares	$ 30.02
Options Exercisable, Ending Balance | $ / shares	$ 37.33